Cloud computing overview / Yushi Shen, Yale Li, Ling Wu, Shaofeng Liu, Qian Wen -- Main components of cloud computing / Yushi Shen, Yale Li, Ling Wu, Shaofeng Liu, Qian Wen -- Cloud infrastructure: virtualization / Yushi Shen, Yale Li, Ling Wu, Shaofeng Liu, Qian Wen -- Trusted cloud initiative...

Taking Zhoukou City in Henan Province as an example, we select the statistics during the period 2000—2009, and use emergy analysis method to research the sustainable use of agricultural land in Zhoukou City. The study results show that: (i) The agricultural input is mainly based on...

This paper considers the controllability of Cauchy problems for linear and semilinear second order differential equations with impulsive condition. A new definition of controllability for second-order system is established. Then, some equivalent conditions for the controllability of linear...