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like the F-22-mulberry factory shop
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?Monolayer graphene oxide samples China University of Science and Technology in Hefei Microscale Physical Sciences at National Laboratory researchers use atomic force tip induced local catalytic reduction to achieve a draw directly on a single-layer graphene oxide nano-transistor devices. Recently, the results, published online in the internationally renowned academic journal "Nature Communications". Graphene is only the thickness of a single atomic layer of graphite, than the currently used metal conductor having a better conductivity, heat dissipation, is also by far the worlds most thin, the greatest strength material, is expected in the field of microelectronics Alternative silicon become manufacturing hyperfine transistors ideal material. How graphene cropped or preparation of a variety of nano line, people dream to carbon as the main material of the premise of the integrated circuit, and also is one of the most challenging in the direction of the field of graphene research. In response to these challenges, the research group of Professor Wang Xiaoping Hefei the Microscale National Laboratory molecular scale quantum-control research team work closely with the research group of Professor Luo Yi directly prepared by the reduction reaction of the local area, conductive insulating graphene oxide nano line and build into a transistor and interconnect circuits. Researchers use a platinum coated on the surface of the tip of the atomic force localized catalysis under a hydrogen atmosphere, the graphene oxide was heated to 100 degrees Celsius to prepare a minimum width is only 20 nanometers the reduction of graphene strip, its conductivity greater than 104 Siemens / m, 100 times more than graphene oxide. By theoretical calculations, they reveal the microscopic mechanism of the reduction reaction of this local area. Using this approach, they have successfully demonstrated a nano interconnection circuits and field-effect transistor device, its performance was superior to the currently used conductive polymers and amorphous silicon FET devices. Experts point out that the technology can be used to draw nanocircuits directly, controllable circuit line width, the preparation conditions, and can be seamlessly compatible with existing microelectronics processing technology, is expected to promote the graphene nanodevices circuit with integrated ultimately achieve and application.F-20 prototype test flight LONDON, December 17: The United States Air Force Magazine 12 of 2012 published in the magazines editor in chief John · A · Winter Parks article "Here Comes Adversary Stealth". John · A · Winter Park, China and Russia have the test flight of the stealth fighter the stealth capability Shangju doubt, and in many places not yet reached less than the United States defined the standard of the fifth-generation fighter, but they have monopoly to the United States more than 30 years of stealth The advantage of the aircraft poses a challenge. For Russias T-50, the U.S. aviation experts pointed out that the T-50 engine blades may become a big radar reflector - no way to completely invisible from the front of the probe. Its engine vents does not seem to consider the basic low observability design - not typical "zig-zag" characteristics of the U.S. stealth fighter. And in addition to continue to wait for the T-50, Russia, was kind enough to Sukhoi Company signed an agreement to buy 48 Su-35 - Su-27 "Flanker" series Ultimate Improved - as the equipment before the transition of new fighters. John · A · Winter Park pointed out, Chinas J-20 in a shape similar to the F-22, albeit similar to the forward fuselage. Inlet seems to draw on the F-35. Wing and tail completely different with other stealth fighter engine vents also seems not to reduce the radar cross-section and a special design, even though it can see the zigzag structure. It is to reduce the radar cross-section forward. Given the length of the J-20 and the position of the center of gravity, it does not seem to be used as a flexible fighter. This big, long aircraft may be designed as a stealth attack aircraft, but not for close combat. Some people think that the J-20 is actually a stealth attack platform, the design goal is to its stealth capability sufficient to guarantee close to the target, rapid withdrawal After the missile launch,mulberry factory shop. These properties will mean that the J-20 will play the role of anti-base or anti-ship. This is also logical, because the American air operations in the Asia - Pacific theater must rely on aircraft carriers and forward bases. In addition, Chinas military doctrine stressed the weakening U.S. advantage early in the conflict - such as intelligence, surveillance and reconnaissance systems, as well as forward bases. Arms trade show, CAC Group show model J-20 weapons bay opens, exposing the air-to-air missile model, which is almost the same with the F-22. If this model is accurate, this means that J-20 will also perform the interception task may attack fleet attacking salvo of missiles, or as a killer for the E-3 AWACS, large the ISR platform or aerial refueling tanker. Information from China, J-20 will form the initial fighting in 2018. J-20 first flight in January 2011, coinciding with the then U.S. Defense Secretary Robert - Gates to visit China in time coincidence. September 2012, the Shenyang Aircraft Manufacturing Group J-31 (also sometimes referred to as J-21 or F-60) flight test photos appear on the network,Mulberry Women Bags, just U.S. Defense Secretary Lyon-E-Panetta visit to China a few days ago. View of Gates and the story of J-20, which seems to be out pass information - China dedicated aviation enterprises have sufficient resources, both research and development of two or more of the stealth fighter, it will challenge in this area United States. All non-stealth aircraft, J-31 and F-22 in the shape most similar. In addition, the position of the center of gravity of the J-31 obviously means excellent maneuverability - this is another important symbol of the F-22. In fact, a photo appeared in the September 2011 network it with the F-22 is very similar to the information has been leaked. From the front, however, no separation board of J-31 supersonic air intake is obviously modeled on the F-35. Existing before, as the resolution of the photo is not enough to judge whether the J-31 engine fan blades hidden in the internal body, like the F-22, F-35 and B-2. J-31 engine vents few seem to consider the the invisible shape or stealth design. J-31s landing gear is very strong. This is similar to the U.S. Navys legendary F-14 "Tomcat", characterized by using a two-wheeled nose gear. Considering these characteristics, which means that J-31 naval version may have the ability to take off and land on an aircraft carrier. But with the U.S. Navys carrier-based aircraft, the J-31 was unable to folding wing. Chinas stealth fighter, the U.S. Pacific Air Force Commander Herbert J. Carlisle will be said, "First progress has been made to improve the capacity and quality", which means that the U.S. Air Force stealth technology in the past three decades The advantage will not become a future advantage. At the same time, he also said, "in the stealth capability, China lagged behind us ...... but they are being developed and get better, of course we can not stay in the past," Carlisle said, "We will have to become better "Most of the time, U.S. military officials are dismissive of these new fighters, claimed to have a the stealth characteristic appearance of the design from the real low detectability long distance. This is inevitable. With the actual value of stealth performance need to set the contents of a wide range of techniques, tactics, training and skills. F-22 combat effectiveness from design sketch to spend 20 years, and during this period the "Raptor" to withstand a lot of costly setbacks. Similarly, the new F-35 also takes a lot of time. To go through a lot of aspects of the pilot phase of the early stealth systems, |
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发表于 2013-4-2 10:35:27
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ut the window or overcast days can not tell sooner or later the Cowherd and the story is still so young and executed for,