Internet history though short, but it can say is contemporary history one of the most important technology, to people’s life and work to bring earth-shaking changes. With the development of technology and network technology, the Internet has already familiar with the gradual integration of the human club will and each of us daily life. Read More…
A firewall is a network equipment, or software system, which should have the base this function mainly include: right
[0 to access network data filtering; (the) management network access behavior; The door) to through a firewall network access records and storage; (3)) can detect the attack from outside the network and alarm; 0 some firewall has I? Address translation functions. According to the characteristics of realization of data filter firewall can be divided into three categories:,” Read More…
The problem of information security of computer field has now become a new discipline, about computer and network security is the many problems at present computing technology of research in the field of hot point. In the vast information security researchers in the field of information security efforts, the water ping has been improved a lot. Read More…
The Internet is a network network is connected with innumerable network by the formation of the network, this is the essence of Inrernet.
Network is how to connect?
Very clear is that will make the two network connected, there must be in two network connecting two computer, it is in this between two computers must have a cable (or cable, microwave, etc) constitutes a path. But simple cable connected couldn’t finish communication. Read More…
Compared with the ordinary LCD monitor, LCD, more high resolution widescreen with better visual effect, can let the user experience to visual wider realm. So present 16×9 widescreen notebook computer mostly with “better entertainment performance” for selling point. Its real besides these, compared to common “screen LCD, wide screen laptop computers have more advantage.
(1) is more advantageous to the multimedia performance Read More…
50 years ago in the 20th century, the use of fossil fuels has been mainly based on coal, coal consumption reached more than half of total world energy consumption; 50 years, large numbers of cheap oil poured into the fuel market. This fuel cheap, high heat value, ease of use, and thus gradually replacing the position of coal in the fuel. World oil consumption has reached about 49% of the total energy. Read More…
Lignite brown coal use more of a role in only a rock δΈ¨ from the peat into the role of lignite) coal. It is the lightest, 1 cubic meter is only 1.1-1.4 tons of lignite quality, not much heavier than water, lignite most loose, hand-pinch will be broken into powder, just dug out of the lignite mine block, saw the sun will wind into coal. Read More…
First, the characteristics of solar energy
As a new solar energy and conventional energy sources such as fossil fuels (coal, oil, natural gas) and fuel, compared with many unmatched features.
1, solar energy directly or indirectly as energy, human play a very important role: One of the advantages is Read More…
Sea water is salty
Often swim into the sea of people, will find it in the pool or rivers and lakes in the difference. First of all, your body will feel more than easy to float in the pool; Secondly, the occasional drink into a sea water, will feel bitter and salty. Why is this? The original sea water in a large number of dissolved salts. The salty sea water, the Read More…
Solar water heater is a solar energy heating the water devices. Use of solar flat-plate collector, the water can be heated to 40-60 degrees, for families, institutions, corporate life, the production offers a bath, laundry, cooking and crafts, water use can also be used for the sun room, greenhouse, cooling and thermal power and other devices. Solar water heaters generally by the collectors, storage tanks, piping and auxiliary equipment loop composition. Read More…