中国已建成世界最大规模4G实验网

与现有的移动通信技术相比，4G的传输速度可提高1000倍，因此在未来，手机不再是传统功能上打电话的工具，而是变成掌上的小电脑，可以实现无线高速上网、看电视等各种多媒体服务。这种功能将直接应用在第四代手机上,将来用第四代手机下载一部DVD电影,只需要10秒钟时间。

中国已经在国内外申请移动通信技术发明专利100余项，在试验网络中采用了分布式无线网络等原创技术，中国已着手开发目前世界上规模最大的第四代移动通信(4G)网络。中国已在第四代移动通信技术上已经处于世界前沿。

10几年的时间里，中国不仅完成了自主的第二代移动通信技术研发，而且提出了被世界认同的第三代移动通信国际标准，到今天中国的第四代移动通信技术也已经与世界同步。

Easy Proof Verification Application - proofSIGN

Be sure your proofs are colour accurate and match ISO or your own standards. Measure and evaluate your proofs quickly and easily with proofSIGN.



Print out the supplied control strip or use a FOGRA media wedge with your job and measure it with the GretagMacbeth Eye-One spectrophotometer. Evaluate the results on screen.

Print out a label and attach it to the proof. Send the proof with the pass to your client and the pressroom with confidence that the proof is absolutely correct. Keep a detailed pdf about the proof for your records or email it for remote proofing purposes.proofSIGN gives you a choice of ISO standard targets:
• ISO Coated - ISO 12647-2 paper types 1/2
• ISO Uncoated - ISO 12647 -2 paper type 4
• ISO Web coated - ISO 12647-2 paper type 3
• ISO Newspaper ISO 12647-3



The proofSIGN screen evaluation and printed label show the deltaE tolerances and the measured results for the paper colour, the primaries and an average for the secondary colours. The pdf gives you a detailed report for each colour on the control strip as well as the paper colour.

详细资料请看: proofSIGN