Logical bad sectors can be said is a soft bad sectors, the disk using the Windows tool can easily be repaired. Specific method is: Go to “My Computer” window, right-click the disk partition bad sectors appear the icon, click the “Properties” menu item, open the disk drive’s “Properties” dialog box, switch to the “Tools” tab , click the “troubleshooting” combo box “Start Error-checking” button that appears “Error-checking disk” dialog box, select “Scan for and attempt recovery of bad sectors” check box, then click “OK” button can. Under Error-checking process 02) How to repair physical bad sectors

How to repair physical bad sectors hard disk?

Repair physical bad sectors on the repair than the logical bad sectors to be more difficult under normal circumstances can only be bad sectors as much as possible into a partition, and then hide the partition, then you can use other sectors of the normal. Physical bad sectors at the beginning, when hidden, first by the hard disk formatting and other methods to determine the approximate location of bad sectors. For example, the disk format for the user to 20%. Time, there has been stagnation, standby and other phenomena, it shows the location of bad sectors in hard disk space, 20%, if the user’s hard drive to 80GB, then the bad sectors on the general position in 16GB.

Then click “Start” a “Control Panel” menu item, in the open “Control Panel” window, double-click “Administrative Tools” icon to open the “Administrative Tools” window, and then double-click in the window, “Computer Management” icon, open ” Computer Management “window, in the VGP-BPL2C battery left pane of the window, click the” store “” Disk Management “option, and then in the right window, select the disk with bad sectors, in accordance with the” main partition “.” extended partition “and” logical partition “in order to delete all partitions. Then again the zoning, there will be bad sectors out of the space program, more attention should designate some space, then the remaining space on the partition and format on it.

03) Hard frequent bad clusters

My hard drive is divided into C, D, E, F in four areas, has long been used well, when the preceding run Lu E Zone disk checker found a bad cluster, did not take too much notice. Format the hard drive to reinstall the system, in use for some time and found some bad clusters, even the C, everything. As the bad cluster to the daily surge, I dare not Jian machine, and ask how this is going on?

The possibility of hard disk a lot of bad clusters, in addition to poor quality of the factors that drive itself, the other with computer hardware and the environment are related, not simply to judge the quality of your hard drive for problems. I suggest you from the following aspects Zhao Zhao reasons:

(1) power supply is stable

In addition to checking the stability of power output than the computer, we must pay attention and power to avoid large appliances (refrigerators, air conditioners, etc.) in the same circuit (the electrical current is very big start, will start the computer pulses generated when a sudden change in voltage it is easy to damage the hard drive).

(2) Check the computer work environment to avoid a shock, smoke, dust and heavy, inappropriate temperature and humidity of the environment.

(3) Check whether the hard disk has bad sectors can be formatted physical examination to determine whether there is a bad cluster, if the physical damage, the best and the dealer to solve the problem.

(4) try to avoid long drives can read and write constantly consider ways to increase vostro 1710 battery the memory to avoid doing the hard disk file system uses swap and keep the hard disk read and write.

(5) Check your hard disk usage

Regularly do disk scan, organize work hard, be noted that the number of hard drive order is too frequent, too often but could easily lead to hard drive damage. Order interval should be based on the hard disk usage to decide if the hard disk usage is not very high, generally you can order two 04 March) Defragment the hard disk any attention?

Disk Defragmenter can improve file access speed, but the blind sort, there may be some unnecessary risk, which requires that we note the following:

(1) Do not organize the data during read and write to disk defragmentation is a very lengthy process, many friends like to order, while listening to songs, playing games, this is very dangerous because when the hard disk defrag in high-speed rotation, read and write data at this time, it could lead to computer crashes, or even damage the hard disk.

(2) not often order

Disk Defragmenter is different from the other computer, the hard drive will speed continuous rotation, if the frequent disk fragmentation, may lead to decreased disk life, the proposed order once a month or so. Preparation work should start before defragging the drive “disk error scan” so that certain files can prevent the system from mistaking logic wrong due files are missing. Concrete action is (to WindowsXP for example): In the “My Computer”, select the drive you want to defragment, click the right mouse button, the pop-up menu, select “Properties”, go to “Tools” tab, click the “troubleshooting ‘column “Start Error-checking” button, then press the prompts.

(4) Do not cross under the two-order system

Many friends have installed Windows98 and WindowsXP dual operating system, but because of system compatibility and other reasons, cross to defrag files may cause the translocation of confusion and even system crashes, the suggestion of friends in order Windows98 Windows98 mini 1000 battery partition, in WindowsXP in order WindowsXP partition.

05) finishing piece to be wrong disk Tridacna gigas

My computer operating system that is Windows XP. The following problems when the recent film finishing operation when the disk affront to the D drive 10 an “as an error, Windows can not complete the collation of the drive asthma action … … ID No. DEFRAG00205″ words. I am prompted to magnetic teeth on the D drive scan (full option) said disk without bad sectors, this is why?

Disk defragmentation is actually necessary to the disk files on the disk to adjust the physical location and movement. In order to ensure that disk defragmentation is complete, all files are able to ensure that documents must be properly deposited in the new location of the cylinders and sectors are not defective.

Therefore, before the general course of defrag, the best to make a disk scan in order to remove or repair the defective region of the disk. Probably because you did not before doing defrag for disk scanning, and in the order were found to have certain shortcomings that make finishing the disk can not continue. Some of the disk defects (not a physical injury) is fixed, so you scan the disk, after that there is no bad sectors.

Recently the use of Windows native defrag functions encounter a strange question, select the. Set by “analysis” button, it says “need to Defrag the hard disk” and then click the “order”, too – after the prompt “order complete”, but distribution of data on the hard disk does not happen any | any change (still very messy ), I cup defrag simply no doubt play a role, how is this going on, hard drive broken? Are there any other way to solve this problem?

We usually install the system files in the C drive, and a lot of software, the default cache (for example, the system cache, IE cache, etc.) will be on the C drive, so the frequency of exchange of C disk files will be very high, which leads to a lot of debris. Work in the system, some key files and system cache can not be moved (defragmentation software will use different colors to identify, observe, Moreover, defragmentation is not necessary to put together all of the files, so also not the most efficient way. Based on the above two points, it may appear you say the “problem” but those will not affect the Yingpan normal use. You can also use Disan Fang Lai Daiti Windows comes with the software Defrag, for example, 0 & 0 Defrag, etc..

17) Hard-chip burning

How to avoid the hard disk on the back of the chip was burned?

Hard on the back of the chip is very important, once burned, the drive can not be identified to the system. Resulting chip burning are many, so take care to protect the chip, used to observe the following several aspects:

① If the power problem, the hard disk and other hardware is likely because of the impact VGP-BPL2 battery of strong currents and burn.

Sometimes the computer chassis ② above with static electricity, excessive static electricity is likely to burn when the hardware, including hard drives.

③ affected by dust, temperature, humidity and other environmental factors, may cause hard disk short circuit.

If the hard drive back in the chip is burned, it will only replace the chip, and find the same type of hard disk and remove the back of the chip, then you can change to the hard disk.

18) hard disk interface damage

I plugged the data line when the careless, the drive pin broke DE interfaces, how to fix it?

If the user when the plug cable carelessness, it will cause the IDE hard disk interface, a curved needle or needle appears the phenomenon will cause the hard disk unusable. If the phenomenon of bending of dollars, should immediately remove the hard drive, using a screwdriver, or needle-nosed pliers to bend needle correction, then the correct IDE cable plug several times, so that curved needle can be quickly corrected. If there is breakage phenomenon, it is more trouble, then the user should first connect the hard drive, hard vostro 1200 battery drive can look normal use (some of the hard disk IDE interface pin is used to connect ground wire, and broken without affecting the hard disk after normal use).

19) hard disk noise too high

My hard drive noise, particularly, how can I do to reduce hard drive noise?

Hard drive noise can be divided into two categories, one is hard to work when the noise, the other is abnormal noise. Hard work, the read and write data will be issued “creak” sound, this is because the head during read and write operation, the head positioning arm drive generated magnetic head is a normal voice. If you find that hard to issue sound like sawing wood when the magnetic head and disk to explain the contact occurred (normally the head and the disk is not contact, but there are some gaps), which will result in disk physical bad sectors appear ,

1.Windows XP installation failure diagnosis and rule out

Compared with other older versions of Windows system, Windows XP installation process has become relatively simple, although simple, but inevitably when the installation fails, there is often a situation of failure to install.

Common installation failures are:

Fault Diagnosis and Troubleshooting

(1) Set error if using Windos XP installation CD is not in the BIOS to set the drive to start the entry, it will not boot Windows XP installation disc to install the operating system.

(2) hard drives configured as low operating systems and application software will have a minimum hardware requirements of the standard, if the hard disk configuration standard can not meet the minimum requirements to install Windows XP, Windows XP can not install successfully.

(3) hardware is not compatible with Windows XP ACPI specification designed in strict accordance PCGA-BP2V battery with the operating system, if the motherboard’s BIOS does not support ACPI can cause installation failures, of course, if not compatible with other hardware components may also cause installation to fail.

(4) If using the hard disk is not loaded Smartdrv installation method to install Windows, you need the user to manually load the program, if not loaded, the installation process will become very slow.

(5) CUP overclocking too high if the user has the habit of overclocking on the CPU, if the CPU frequency Ultra-over Gao, installing Windows, also there may be crashes, blue screen and other failures, leading to not be installed. This situation should be first restored to the default frequency of the frequency, after installing the system may consider re-overclocking.

Uninstall failure

Driver

2.Windows XP boot failure diagnosis and rule out

And before the operating system than Windows XP, Windows has a very high system performance, although higher than previous versions of Windows may be more stable and have higher performance, but a variety of software failures will still be endless. The system can not boot Windows XP software failure is the common one, the system can not start if the software fails, you can use the following methods to diagnose and exclude:

Troubleshooting specific steps:

(1) with a Windows boot disk using the Windows boot disk, can be solved as the active partition’s boot record or boot files used by the destruction caused by the fault. Make Windows boot disk is in normal running Windows XP computer knowledge to format a removable drive (such as U disk, mobile hard drive) or use the CD, then the system root directory under the Boot, ini, NTLDR, Ntdetect file copy to the storage disk, and then use computers to create a Windows boot disk failure.

(2) use the “Last Known Good Configuration” feature use the Last Known Good Configuration startup system, the operator can cancel any changes made to the registry recently. Used method is to start the system by pressing the F8 key on the keyboard from the Windows Advanced Options menu, select “Last Known Good Configuration” option.

(3) use “System Restore” feature if the system opened a “System Restore” function, when other keys, from the double-Advanced Options menu, select “Safe Mode” into Safe Mode, and then click click on Start / All Programs / Accessories / System Tools / System Restore, select a restore point to start the System Restore program.

(4) use the “Recovery Console” serious failure in Windows, you can start the system using the A1286 battery installation CD, then use the “Recovery Console” to restore the file.

(5) repair partition repair partition boot record contains the operating system boot record information in the file system and a very small machine language program. After the partition boot record damaged, you can use the Recovery Console tool called Fixboot to be repaired.

Repair the master boot sector master boot sector contains the disk partition table and boot code, a name-based small program that is responsible for positioning activities in the partition table, boot disk, partition. Master boot sector is damaged, you can use the Recovery Console tool called Fixmbr to be repaired.

Failure to uninstall the driver for some hardware, some computer to install a new driver, there will not boot into the system situation. After this occurs, you can press the F8 key when the system starts, select the menu that appears, select “Safe Mode” into Windows XP safe mode, there will be trouble uninstall the driver, or use the System Restore tool restore the system to not install the driver of a period.

3.Windows XP Fault Diagnosis and Troubleshooting

Start Windows XP in addition to a variety of fault occurs when the outside during operation may also occur in the software failure. Fault caused by Windows XP are many reasons for the failure phenomenon shown vary, here are some typical simple fault diagnosis and treatment.

Failure incentives Remedy:

(1) third-party software failures caused by running some applications when you install or uninstall Windows XP system settings changes, or mistakenly replace the normal system files or remove, leading to system failure occurs. This failure, just will not quit or uninstall the software compatible; sometimes there may be some software settings caused by improper Windows XP system failure.

(2) viruses, Trojans, malware-induced failure of some malicious programs, viruses, Trojan will install the software bundled through the website or the way people invade your computer, and may modify the Web browser’s home page, self-starting options, security options, etc. settings, pop-up advertisements may also interfere with the normal operation of the user, taking up system resources, causing Windows XP can not access there and can not enter the system, frequent restarting, could not open procedure fault. Against such failures, you latitude D410 battery can install the latest version of antivirus software or firewall, and regularly killing the virus.

(3) failure caused by misuse, if the system settings on the Windows XP do not know, incorrectly modify the system settings may cause system failure.

(4) the use of streamlined installation disk failure caused a lot of the rumors now revised to streamline the Windows XP installation disk, these are being modified to install pirated version, most of them have been deleted some not commonly used system files, to streamline Some system functions. Some malicious disc manufacturers may also integrate these discs Trojans, viruses and other harmful system security procedures. So do not install this type of Windows XP, type the security of the operating system simply can not guarantee.

(5) failure caused by hardware drivers without hardware drivers, or drivers Microsoft WHQL certified inherent defects, which may cause Windows XP, blue screen, can not enter the system, CPU occupancy rate of such failure, such failures can occur in a safe mode, the corresponding driver uninstall, then re-install the good drivers.

Software failure occurs, mainly due to software errors, improper operation of the user, system configuration errors caused by incorrect parameters. Software failure mainly in the software installation, commissioning, operation, maintenance failure, failure generally affect the use of a single software, can lead to serious crashes, the majority of software failures can all be repaired, generally not damage to the hardware device.

1.5.1 Software fault diagnosis based on knowledge

All computers in the event of failure, the vast majority of failures are “soft fault”, for computer beginners speaking, only through a number of targeted learning and training, can grasp in a short time a number of software failures diagnosis and exclusion of basic skills.

1. The performance characteristics of software failure

Software failure, compared with the hardware failures, software failures can generally be easier to fix or repair, software failure have the following characteristics:

(1) functional error: is the software problem and the board will not lead to host various components PCGA-BP2E battery of physical damage, but due to functional errors cause the system to loss of function. Therefore, the correct diagnoses in the future, simply set correctly, adjust the return to normal.

(2) hidden: a software fault which appears mostly in the operating system, software failure occurs will result in many beginners no start. In fact, not difficult to solve a software problem, as long as the right medicine, will soon be prescribing the medicine.

(3) Random: software fault has generated more random, no clear rules, such as software failure caused by misuse is fleeting, very short duration.

(4) Recoverability: This is the biggest difference with the hardware failure, software failure can be restored, sometimes you can just restart your computer back to normal, also when you need to install or configure the software to return to normal.

2 reasons for software failure occurs ..

There are many reasons for software failure, common files are missing, the file version does not match, memory conflict, memory exhaustion, resource conflicts, viruses and destruction. The most common is the virus destroyed, as the virus causes most of the software failure can not re-install the operating system under the premise solution, if the system file is damaged, while others need to reinstall the operating system can be completely resolved.

Detailed explanation of the causes of

(1) the occurrence of the virus destroyed the vast majority of software failures caused by virus attack, because the virus destroyed files, thus resulting in error or not run. To resolve this type of software failure, the need for systematic and comprehensive anti-virus.

(2) start the operating system file is missing or applications, the need to use a lot of files, such as various virtual program. Close association with the application of dynamic link libraries, etc., if these files are accidentally deleted or damaged other causes, related equipment and procedures can not work or does not work.

(3) file version does not match the variety of applications install when the application program to the system, Fu Zhi Hui series of new Wen Jian or Genghuan now document which could lead to new and existing software, not software compatibility. Install new software and install the upgrade file, copied to the A1278 battery system in the majority of files are files, but files can not be compatible with existing software is to produce most of the main reasons for the illegal operation.

(4) resource conflicts are now more and more computer peripherals, more and more external devices can often cause the computer system resources reduced, leading to the phenomenon of resource conflicts occur. Resource conflict occurs, the light may cause the sound card, network card. Graphics. Printers and other equipment does not work, serious cases can cause the computer does not start, or crashes during the operation.

3, software fault diagnosis of ideas

To master the software, troubleshooting method, both need to understand computer hardware, system software and they need to be familiar with the relationship between application software. Although the reasons for software failure produced a lot, but some of the time of diagnosis can also follow the organization of writing. Failure in the diagnostic software can generally refer to the following method step by step:

Step diagnostic idea

1: Current computer work calm and observe the situation, for example to see if there are error messages displayed, whether a procedure is hard to read, whether abnormal noise, etc., which have preliminarily determine fault components.

Second: If the fault belongs to the software, to further confirm what the current environment in which software is running, run the system software or run other applications.

3: repeatedly tested to verify that the failure was inevitable or accidental, and caused a failure to fully pay attention to the environment and conditions.

4: COMS parameter settings carefully examined whether the requirements of the hardware configuration, hardware drivers installed correctly, the hardware resources, the existence of conflict.

5: detailed understanding of the system software version with the application of the match.

6: full points off the failure phenomenon occurs with the virus, killing the Dell mini 12 battery virus in time.

4. How to prevent the occurrence of the software so Chen

Software fault with the hardware failures, as many are preventable, the use of the software should try to do the following:

Notes

-: A new software is installed before you fully examine the compatibility of the software and systems.

2: a new software is installed before the installation of the software should be called good antivirus program operations, to ensure that newly installed software does not carry the virus.

3: in case of illegal operations and blue screen prompts carefully analyzed, according to the information to find fault because of its exclusion.

4: If you feel something wrong, he should observe the system resources occupancy, ferret out suspicious process.

5: When you delete an application, as far as possible to use the program’s uninstaller pulling load or unload from the control panel, should not manually delete the program files.

This stage, the basic orientation of the development of radar technology to improve radar performance and expansion capabilities to meet the economic, social and national security needs. For example, mention Gao radar sensitivity (improved detection and suppression technology background interference), and increase the effective power aperture product of the technology, can increase the detection range or better detection of small targets (including “stealth” target \ the development of more general pulse Le technology, benefit from the strong ground clutter to detect low-flying targets and extract the target parameters; for severe convective weather storm zone three-dimensional structure, only by the Doppler technique can be explored. of the rapidly developing synthetic aperture radar technology, no longer observing the object as a “point” target, Jin measure HP 4210s battery it’s position and movement parameter; Er Shi Chang Jing by Huo De objectives and the image, measured objectives of the other Tezhengcenliang, Ru shape, size, fine Jie Gou Shen Zhi Wu Li properties to extend the range of radar measurement of target parameters. synthetic aperture radar technology has become the first professional application of a new radar features 11 images, and applied to different radar. more progress in radar technology to improve the radar target detection accuracy, resolution, anti-jamming capability, target identification capability.

Advances in radar technology, ranging from system design to the basic component parts of a whole range of progress, but the main radar system technology, microwave antenna, high power transmission technology, high performance receivers and signal processing technology and high-speed data processing technology. For example, in the antenna, since the pulse Doppler radar and other requirements with the high gain antenna and low sidelobe, so Waveguide Slot Array Antenna has been developed rapidly, and its sidelobe levels are better than one 40DB traveling wave slot array antenna array has been developed was successful and practical application; However, the antenna of the most remarkable development is the phased array antenna technology, has developed and applied a passive phased array (only the antenna array access in each unit of a phase shifter, and transmitter and receiver is still centralized), semi-active phased array (except for each antenna array element access to a phase shifter, the will all the cell groups, each group has had a transmitter Dell XPS 1340 battery and receiver end of class front-end) and the Active Phased Array <Array Each unit has a transmitter receiver component of a T / R components). In the transmitter, the operating frequency at 4GHz below (mainly P, L and S band) and solid-state transmitter (usually silicon microwave bipolar power transistors> has matured and gained practical application, to improve the performance of radar systems and reliability. In the receiver, the IF digital technology and high-stability frequency synthesis technology has been widely used, direct digital frequency synthesis (DDS) technology and to the FM receiver is also broadband access to the application.

Radar operating frequency from the microwave band to the ends of extensions: high-end to the millimeter wave and laser direction, low-end to short-wave direction. Have been a millimeter wave radar, laser radar and short-wave OTH radar, to meet some special requirements.

The spectral efficiency of wireless communication systems, information capacity and transmission rate developments, the proposed antenna more Gao requirements. From the initial mobile devices for portable whip antenna, and now dual-band compact handset antenna, the antenna towards the multi-band wideband, small size, high efficiency, low cost, easy integration direction. With the development of wireless communications, especially after future 3G and Ad-Hoc networks, in order to better improve communication performance against multipath fading and interference with adjacent users in the user terminals on demand has become increasingly smart antenna the more urgent. Some simplified smart antenna that new research and development, such as parasitic antennas and reconfigurable antennas transfer. In order to meet the harsh environment and limited wireless bandwidth spectrum high capacity mobile communications, data rate Gao, Gao coverage, high spectral efficiency, high reliability requirements, in recent years, UWB / SP wireless communication HP 4510s battery technologies has caused a great deal in the international of fever, one difficulty is that the design of ultra-wideband antenna; In addition, more than at home and abroad are being vigorously developed input multiple-output (MIMO) technology is also possible that one of the important technical breakthrough.

Below 7 on the multi-band mobile broadband terminal antenna, reconfigurable antenna, ultra wideband / short-pulse antennas, multiple-input multiple-output mobile terminal antennas for a description of developments.

1. Multi-band mobile broadband antenna justice

To enable communication systems to applications in multiple frequency bands simultaneously, including multiple communication frequency bands, the same communication terminal on a variety of wireless services, such as GPS, Bluetooth, WLAN and other services, multi-frequency / broadband antenna is the key issue. In addition, for a variety of commercial, civil and military needs, mobile communication terminals of conformal antennas, small size, Gao efficiency, low cost, easy integration into a new hotspot. As the antenna bandwidth, size, efficiency, and constraints are interrelated, and therefore taken into account how the three to find the balance point to achieve the best effect, is the design of mobile terminal antenna research focus.

2. Reconfigurable antenna

In the future 4G and Ad-Hoc and other wireless communication systems, wireless access to further enhance the system capacity and performance, has a smart antenna can be used, such as parasitic power transfer antenna. Parasitic tune the antenna is usually only one RF channel, but around the parasitic elements through the electrical resistance changes in the value loaded antenna in the whole plane to within a scan, a low-cost, simple system and so on. Parasitic tune the antenna is a reconfigurable antenna. Reconfigurable antenna, including frequency of reconfiguration, reconfigurable pattern, polarization can be reconstructed and also Lenovo Y650 battery has several characteristics of the antenna can be reconstructed, and its research unit involved in antenna, antenna array and control algorithms. In recent years, international conferences and academic journals which, on the reconfigurable antenna rapid increase in the number of articles, has received considerable attention, and its effective analysis and design theory a lot of work to be done.

Reconfigurable antenna is an important issue is to select superior performance to the antenna switch and integrated them. With the recent high-performance, low power micro-electrical mechanical (MEMS) switches and a number of GaAs PHEMT switches such as the emergence of technology, making the development of reconfigurable antennas have a better future. Switch is the ideal switching characteristics, a high isolation, low power consumption, easy to integrate. Now widely used in mobile communication performance of GaAs switches have also been significantly improved. 3. Ultra-wideband / short-pulse antennas (UWB / SP>

In recent years, ultra-wideband / short-pulse wireless communication technology in the international arena has caused a tremendous research interests. It has the energy in the home, office space and within a short distance to provide high-speed transmission, and without taking up additional spectrum resources and a series of advantages, so as to form personal networks (PAM) 8 and to meet strong global demand for greater bandwidth provided ideal way.

UWB / SP system to deal with the short pulse time domain signal, its spectrum covers a very wide, in order to ensure that the signal received by the antenna radiation and the time domain waveform is not distorted, which called for Gao fidelity, it is not only required for the antenna in the frequency domain UWB, but also to ensure that the antenna phase center with the same characteristics of UWB.

4. Multiple Input Multiple Output (MIMO) antenna next generation mobile communication technology, wireless broadband communications technology, the research group aims to make wireless communications spectrum efficiency, capacity and speed have increased tenfold or even hundredfold. Multiple-input multiple-output (MIMO) technology is probably one of the important technical breakthrough. Systems used in transmitting and receiving end of multi-antenna signal to control the spatial distribution, at the same frequency at the same time under the conditions of use of multiple antennas to provide parallel subchannels to increase system capacity or through spatial Toshiba NB200 battery diversity to enhance the quality of signal transmission Gao.

(1) adaptive MIMO technology.

MIMO technology is an important trend is adaptive multi-antenna technology. Traditional MIMO system requires the same number with the number of antennas the higher the price of RF transceivers. The adaptive MIMO system may use the number of RF transceivers less than the number of antennas with reconfigurable antenna MIMO system based on environment / channel automatically selected conditions, adjust the antenna elements used to obtain a small space correlation channels and large channel capacity.

(2) broadband multi-antenna technology miniaturization.

Mobile communication terminal by the mobile terminal multi-antenna systems, especially mobile phone measures only one wavelength or even smaller very strict restrictions, and require smaller antennas and seek with the mobile terminal equipment conformal. If we want such a harsh place multiple antenna size constraints and its corresponding control circuit Yi support adaptive techniques are in the Tian Xian unit, the control circuit miniaturization Tichu extremely difficult requirements. At present mobile communication systems and mobile personal communications systems used by the standard antenna structure is a monopole antenna or the built-in PIFA, the antenna is clearly unable to meet both the need for multiple antenna systems.

Therefore, mobile terminals, particularly in mobile terminals, on one hand required size of the antenna element itself to further miniaturization and high efficiency; the other hand, work to solve the original wide-band single antenna element in the application to multiple antenna system, after some band antenna unit of work becomes narrower, so as to achieve scale mobile broadband multi-antenna systems. In addition, mutual coupling between antenna elements ProBook 4515s battery Yi in isolation is a key indicator of the efficiency impact of the antenna, the antenna matching unit to be good, mutual coupling / isolation determine the antenna efficiency, but also the correlation between antenna elements and antenna The pattern, which directly affects the capacity of MIMO communication systems and quality.

Wireless mouse from there to now have a couple of years, and now the mouse is the most widely used wireless technology Bluetooth and 27MHZ, advantages and disadvantages of the two technologies are very obvious.

First, Bluetooth. This is one of the high-end wireless technology to provide maximum reliability, frequency range, security and scalability. Bluetooth wireless transceiver to connect the computer to receive from the wireless Bluetooth technology devices (such as keyboard and mouse) in the signal. A separate wireless transceiver simultaneously with up to 7 Bluetooth compatible device communication, thus greatly reducing the restriction on multi-cable. If you prefer the wireless desktop, Bluetooth technology is the best choice. In addition to these Pavilion dm3 battery advantages, the Bluetooth technology also provides high-end functionality and features, it’s convenient, reliable wireless connectivity, longer than other wireless technologies, wireless range, wireless transceiver with Bluetooth technology and equipment as much as 9 meters apart.

27MHZ is selling most of the wireless mouse and keyboard products using the technology. 27MHZ refers to the use 27MHZ ISM (Industrial, Scientific, Medical) radio frequency band of a technology. In this frequency band has four channels worldwide: two for the wireless keyboard, wireless mouse for the other two. Keyboard and mouse on the computer to plug the receiver send information. Is a one-way transmission, from the keyboard or mouse to the receiver. Because other types of wireless devices such as cordless phones Portege T130 battery or wireless 〔network equipment) is rarely used 27 off the frequency, so little risk of interference from other devices. Keyboard and mouse each have two channels also reduced with other nearby wireless keyboard or mouse, the interference between the products.

Both techniques are available, 27M already quite mature, the use of this technology for wireless mouse, wireless keyboard and other products are more; and Bluetooth technology, while more mature, but products using this technology, performance, cost, relatively high. With these two advances in technology, cost and performance will be better. Therefore, the wireless mouse and other products in the future will become more popular.

Early computer bulky, and by vacuum tubes and the transformer, often followed by dozens of engineers busy. As technology continues to improve gradually developed to the printed circuit board technology, the current board are using printed circuit board. The careful observation of the motherboard, the top is composed of densely packed copper, large quantities of computer data transfer, must rely on these complex circuits. Those responsible for data transfer ProBook 4710s battery bus line is called the structure of the hard disk from the motherboard and other components outside the received data over the line, then called the bus. Why do so many motherboard bus structure needed? Simply put, a line once the amount of data transmitted is a byte, if the computer is 32 bytes, while each time that it came 32 bytes of data, that is, the CPU on the motherboard , chipsets and memory and other important components, with 32 lines are needed. If the computer is 64 bytes, line naturally increases.

Motherboard chipset is another important component. When fixed in the manufacture of chips on the host, while the different types of chip set will also affect the performance of the host. Simply put, chipsets, motherboards main function is to coordinate the various components, such as CPU and communication between various devices, the bus structure, data transfer, and the various control signals, so it can be likened to the human body “spinal cord.” Select a relatively new chip, motherboard features also supported more.

The most important computer components-CPU memory, chipset and function cards are placed in the socket and the socket on the motherboard, a closer look, the board covered with dense Ma Ma’s line, these lines despite its small size, is very important, they responsible VGP-BPS7 battery for transmission of information between the various components, such as CPU instructions issued by the various components, as well as receiving and processing the data component. Between the motherboard and hard drive, then through the white flat cable to connect, and transport data. On the motherboard, there are several hosts behind the seen, the screen and keyboard connected all around the socket. Is through this way, all around the motherboard and components are linked, so the main

Board has a name in English is called: “MotherBoard (motherboard)”, which this computer linked to the family members.

August 12, 1981, IBM started joint Microsoft and Intel co-production of civilian micro-computer. The so-called civilian is to give individuals and general business use, this can be a truly personal computer. It’s CPU is only clocked at 4.77MHz memory 64K. The operating system is Microsoft produced DOS1.0, the price of this computer up to 3 005 U.S. dollars. Apple Computer was advertised to the 18 on into the personal computer market welcomed. 18 on the 5150 called the Personal Computer?, It means in English inside the PC, then out of it, the first letter of the two words together, called a PC.

IBM PC’s birth, to the computer industry has brought far-reaching impact. IBM PC, Lenovo Ideapad Y650 battery the significance of the most revolutionary is that it is open standards, IBM open all the technical details and design secrets, where it bought the operating system from Microsoft, and from there to buy the Intel CPU chip, and allow Microsoft and Intel You can sell other companies products again. IBM is willing to disclose all technical documents, sincerely welcome the development of peer-to join the ranks of the PC. For IBM, this step lightly, this giant of the world’s most traditional groups, public renunciation of all hardware and software alone manufacturing strategy, not only the general user Renke the personal computer, and to promote electronic and computer companies around the world competing Transferring PC, copy out the product is IBM PC compatible.

IBM PC appearance, led the personal computer market, a huge development, as the world’s personal computer market has great potential, it has always maintained a fast momentum; also the associated computer-related and other industries, such as software, electronics, materials , network, etc., are driven by its rapid HP ProBook 4311s battery development has made to the world brought great economic benefits.

Apart from the economic and social benefits outside the PC, also known as personal computers, PC on us personally, influence is enormous. Because of its powerful, it changed the way we work, study and live. Now, a person can stay at home work at home, learning, living, as long as there are networked computers at home can be.

Apple’s philosophy is Think Different (extraordinary;). Apple has always insisted on their own ideas, whether software or hardware are doing different, kind of cold the computer image removed from people’s minds, creating a colorful and user-friendly computer age.

In addition to personalized look outside Apple’s performance is very outstanding, TOSHIBA Satellite E105 battery especially in graphics processing. As Apple’s powerful graphics capabilities, often used as a graphics workstation for graphic, video and design work, therefore, its price is also more expensive than the PC computer.

Compared to other companies like Apple with a technology innovator and artist, rather than commercial home disadvantage in the market competition is inevitable, a company against the entire PC industry, and the natural is not a victory. But in recent years, Apple has made great progress, it is the market and the needs of users on the first one, the recent diversification of the business philosophy initial success, iPod and other Apple products, hot drive performance, but that does not Apple represents all accepted by the market, compared to other IT giants, Apple is still not really strong.

The reason why the decline of Apple, is its pride and strength. Apple is not compatible with too many things, from hardware to software, seem to earn their own living one person to control the entire market, while Microsoft and the PC open to ideas to conquer the whole world, the apple is still no such sense of openness, Apple, if not to market to do the greatest degree of compromise, then Apple will never become a mainstream choice, always played in specific VGP-BPS15 battery areas of expertise in the role of the nobility alone.

20th century 90’s, Apple’s Steve Jobs back at the former president, since then, Apple’s image of the fashion alternative to re-cut a striking figure in the II sector, which causes great concern to computer users, Apple’s old and therefore advocate cheered.

January 2006, Apple announced the Macintosh with Intel processors to produce series of personal computers, Apple Computer turning Intel. Apple Computer Inc. said it will end in 2007, have adopted all of its flagship product of the old processor. This shows that Apple started to give up its policy of not opening up the future how, let us wait and see.