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991.
Two waves of technology are dramatically changing daily life: cloud computing and mobile phones. New cloud computing services such as webmail and content rich data search have emerged. However, in order to use these services, a mobile phone must be able to run new applications and handle high network bandwidth. Worldwide, about 3.45 billion mobile phones are low end phones;they have low bandwidth and cannot run new applications. Because of this technology gap, most mobile users are unable to experience cloud computing services with their thumbs. In this paper, a novel platform, Thumb-in-Cloud, is proposed to bridge this gap.Thumb-in-Cloud consists of two subsystems: Thumb-Machine and Thumb-Gateways. Thumb-Machine is a virtual machine built into a low end phone to enable it to run new applications. Thumb-Gateways can tailor cloud computing services by reformatting and compressing the service to fit the phone' s profile. 相似文献
992.
In January 2010, the State Council of China decided to speed up the convergence of the telecommunications network, cable network and Internet network. That means the government led practical exploration of the networks convergence. The convergence is related to the entities in the fields of telecommunications, broadcasting and the Internet industry. The authors apply the static game theory to analyze the games among the players in the fields of telecommunications and broadcasting, and point out that the games would strengthen the network infrastructures, promote the development of related industries, and profoundly influence and change the ways of thinking and social management in China. At last, the paper puts forward some policy recommendations. 相似文献
993.
994.
LiangChao Li JianYu Yang GuoLong Cui ZhengMao Jiang Xin Zheng 《Journal of Infrared, Millimeter and Terahertz Waves》2011,32(1):102-115
This paper mainly deals with the problem of detecting and identifying target in close range, the performance of which will
be effected by the radiometer’s parameters and target’s characteristics. According to the relationship between the range equation
of the Passive Millimeter Wave (PMMW) and these parameters, we present a convenient statistical method based on PMMW image
detection to solve the inherent problem by statistical radiometer parameters, which can be achieved by the W band radiometer
experimental data. Finally, we validate the method by simulation and experiment. The results show that the method is convenient
for detecting and identifying target in close range. 相似文献
995.
996.
A new method for single sinusoidal frequency estimation in closed-form formula is proposed. Since sinusoidal signals are narrow-banded and white noise distribution is statistically equal in the whole spectrum, a narrow-band signal extracted from the Fourier transform of the original signal can be used to approximate the noise-corrupted sinusoidal signal. A concise closed-form formula is then deduced to estimate the frequency based on the narrow-band signal. Performance analysis and simulation results are presented, showing that the new algorithm has close performance to the Cramer-Rao bound, especially under low SNRs. It is also demonstrated that the method can be easily generalized to multi-sinusoidal signals. 相似文献
997.
Zheng S Huang W Gao N Cui R Zhang M Zhao X 《Chemical communications (Cambridge, England)》2011,47(24):6969-6971
One pot asymmetrical double allylations of sodium sulfide catalyzed by an iridium complex along with a combination of caesium fluoride and water in dichloromethane have been realized and the double allylation products with two C-S bond chiral centers were obtained in 67-99% yields with b/l 81/19-99/1, dr 85/15-99/1, and 96-99% ee. 相似文献
998.
Sun Z Wang Y Wei Y Liu R Zhu H Cui Y Zhao Y Gao X 《Chemical communications (Cambridge, England)》2011,47(43):11960-11962
Silver cluster-aptamer hybrids were mineralized via an artificially designed aptamer. The hybrids gave red emission when excited by light, and they successfully targeted the nucleus of live cells. This method is an effective approach to make cell target probes. 相似文献
999.
Highly stable covalently attached multilayer films were constructed by visible-light irradiation of hydrogen-bonding directed multilayer films of poly(allylamine) and poly(4-vinylphenol). 相似文献
1000.
We report a new reducing agent system: hydriodic acid with trifluoroacetic acid, which can chemically convert graphene oxide into reduced graphene oxide at temperatures below 0 °C in solution. This is the first achievement to produce reduced graphene oxide at subzero temperature with a mass production. 相似文献