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| 1 | Energy-Optimal and Delay-Bounded Computation Offloading in Mobile Edge Computing with Heterogeneous Clouds显示文摘By Mobile Edge Computing(MEC), computation-intensive tasks are offloaded from mobile devices to cloud servers, and thus the energy consumption of mobile devices can be notably reduced. In this paper, we study task offloading in multi-user MEC systems with heterogeneous clouds, including edge clouds and remote clouds. Tasks are forwarded from mobile devices to edge clouds via wireless channels, and they can be further forwarded to remote clouds via the Internet. Our objective is to minimize the total energy consumption of multiple mobile devices, subject to bounded-delay requirements of tasks. Based on dynamic programming, we propose an algorithm that minimizes the energy consumption, by jointly allocating bandwidth and computational resources to mobile devices. The algorithm is of pseudo-polynomial complexity. To further reduce the complexity, we propose an approximation algorithm with energy discretization, and its total energy consumption is proved to be within a bounded gap from the optimum. Simulation results show that, nearly 82.7% energy of mobile devices can be saved by task offloading compared with mobile device execution. | Tianchu Zhao Sheng Zhou Linqi Song Zhiyuan Jiang Xueying Guo Zhisheng Niu | 2020 | China Communications2020，17，5： | 18 |
| 2 | Sub-synchronous frequency domain-equivalent modeling for wind farms based on rotor equivalent resistance characteristics显示文摘The equivalent simplification of large wind farms is essential for evaluating the safety of power systems.However,sub-synchronous oscillations can significantly affect the stability of power systems.Although detailed mathematical models of wind farms can help accurately analyze the oscillation mechanism,the solution process is complicated and may lead to problems such as the“dimensional disaster.”Therefore,this paper proposes a sub-synchronous frequency domain-equivalent modeling method for wind farms based on the nature of the equivalent resistance of the rotor,in order to analyze sub-synchronous oscillations accurately.To this end,Matlab/Simulink is used to simulate a detailed model,a single-unit model,and an equivalent model,considering a wind farm as an example.A simulation analysis is then performed under the sub-synchronous frequency to prove that the model is effective and that the wind farm equivalence model method is valid. | Yanhui Xu Tianchu Gao | 2022 | Global Energy Interconnection2022，5，3： | 4 |
| 3 | Diagnostic role of microRNA expression profile in the serum of pregnant women with fetuses with neural tube defects显示文摘 | Hui Gu Hui Li Li Zhang Hong Luan Tianchu Huang Lili Wang Yang Fan Yi Zhang Xiaomei Liu Weilin Wang Zhengwei Yuan | 2012 | Journal of Neurochemistry2012，，3： | 1 |
| 4 | Context-based Ontology-driven Recommendation Strategies for Tourism in Ubiquitous Computing 显示文摘 | Lin Shi Lin Feiyu Yang Tianchu | 2014 | Wireless Personal Com- munications2014，76，4： | 1 |
| 5 | Improvements and New Evaluation of NIM4 Cesium Fountain Clock and Construction of NIM5 Clock in 2006显示文摘The NIM4 cesium fountain clock has been operating stably and sub-continually since Aug. 2003. In this paper we present improvements on NIM4 in 2005-2006 and the most recent evaluation for its frequency shifts with an uncertainty of 5E-15. A 220 days comparison between NIM4 and GPS showed an agreement of 2E-14. Finally the construction of a NIM5 transportable cesium fountain clock is briefly reported. | Li Tianchu, Li Mingshou, Lin Pingwei, Wang Ping, Chen Weiliang, Liu Nianfen, Lin Yige(National Institute of Metrology (NIM), No.18,Beisanhuandong Rd, Beijing 100013, China) | 2007 | 工程科学(英文版)2007，5，2： | 1 |
| 6 | NIM5 Cs fountain clock and its evaluation显示文摘 | Fang Fang Mingshou Li Pingwei Lin Weiliang Chen Nianfeng Liu Yige Lin Ping Wang Kun Liu Rui Suo Tianchu Li | 2015 | Metrologia2015，，4： | 1 |
| 7 | Cigarette Package Warnings for Adult Smoking Cessation—China,2018显示文摘Summary What is already known about this topic?After the framework convention on tobacco control(FCTC)came into force,the health warnings on cigarette packaging in the mainland of China had been changed in three rounds.But the warning label is still only pure text and without descriptions of specific health consequences caused by tobacco use.What is added by this report?Although there were two rounds of changes from 2010 to 2018,current health warning labels did not work in increasing Chinese smokers’smoking cessation intention compared with the previous one.Large pictorial warning labels were more effective than the current health warning label in stimulating Chinese smoker’s willingness to quit. | Lin Xiao Xinbo Di Yi Nan Tianchu Lyu Yuan Jiang | 2020 | China CDC weekly2020，2，22： | 0 |
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