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| 1 | Statistical study of the properties of the magnetic field and plasma in the earth's magnetotail near lunar orbit显示文摘基于数据获得了由的磁场和血浆在月亮的轨道附近的 magnetotail 的在 19921995 的 GEOTAIL 和风 in19942009,磁场和血浆性质用迭加的时代分析统计上被学习。结果近显示出那 0 ?? 邬吗?? | TIAN Tian ZONG QiuGang WANG YongFu FEI ZengPing | 2012 | Science China(Technological Sciences)2012，55，9： | 5 |
| 2 | Parameter estimation of chirp signal under low SNR显示文摘Aiming at solving the problem of great difficulty and low accuracy existing in parameter estimation of chirp signal under low signal-to-noise ratio(SNR) condition, an algorithm of accurate parameter estimation of chirp signal is proposed. First, the algorithm extracts ridge frequency of chirp signal based on Short Time Fourier Transform. Second, the protruding glitch frequencies are eliminated through median filter with proper size and the smoothing frequencies are obtained corresponding to the time. Third, the frequency time frequencymodulated(FM) line is fitted coarsely by the least-square linear fitting method, and some frequency points are removed, which are far away from the FM line. Repeat the process several times until the sample correlation coefficient of the fitted line is in high degree when the optimum chirp line is fitted out, so chirp rate and initial frequency are obtained. Simulation shows that the correct rate of parameter estimation is very high. When SNR is not less than –17 d B, the correct rate is 100%, and when the SNR is –18 d B, the correct rate is still capable of up to 99%. This algorithm has a lower SNR threshold of about –17 d B. When the SNR is greater than threshold,parameter estimation accuracy is close to Cramer Rao low bound(CRLB), higher than parameter estimation based on the phase field method. Measured data experiments show that the algorithm can reasonably fit the chirp line of measured chirp signal, which better characterizes the FM features of chirp signal. | WANG JinZhen SU ShaoYing CHEN ZengPing | 2015 | Science China(Information Sciences)2015，58，2： | 5 |
| 3 | Coordinated Modulation Strategy Considering Multi-HVDC Emergency for Enhancing Transient Stability of Hybrid AC/DC Power Systems显示文摘This paper presents a multi-HVDC emergency coordinated modulating strategy to enhance the transient stability of hybrid AC/DC power systems.First,the main factors that affect the unbalanced energy distribution during a fault are analyzed,and the dominant generators are determined online.Next,considering the influence on both generators in the sending and receiving ends,the assessment index that evaluates the effects of DC power support is established.On the basis of this,a dynamic DC power support strategy is put forward,and the DC support sequence table is promptly updated by the changing dominant generators.The AC/DC hybrid power system with multi-DC lines is built and used as a test system.The simulation results of different scenarios demonstrate that the proposed method could follow the dominant generator dynamically and adjust the DC participating in modulation to enhance the transient stability effectively and quickly. | Tong Wang Congcong Li Dengkai Mi Zengping Wang Yuwei Xiang | 2020 | CSEE Journal of Power and Energy Systems2020，6，4： | 4 |
| 4 | Protection dynamic reliability analysis system based on 3RF technique 显示文摘 | DAI Zhihui WANG Zengping | 2011 | IEEE Trans on Power Systems2011，26，3： | 1 |
| 5 | Reliability evaluation of the communication network in wide area protection显示文摘 | DAI Zhihui WANG Zengping JIAO Yanjun | | 0，，04： | 1 |
| 6 | Protection dynamic reliabili- ty analysis system based on 3RF technique显示文摘 | Dai Zhihui Wang Zengping | 2011 | IEEE Trans on Power Systems2011，26，3： | 1 |
| 7 | Simulation Study of the Workspace of the Parallel Machined Tool显示文摘 | Zhang J M HAO Juan Wang Zengping | 2001 | Journal of Beijing Institute of Technology2001，10，2： | 1 |
| 8 | Identifying transformer inrush current based on normalized grille curve显示文摘 | MA Jing WANG Zengping YANG Qixun | 2011 | IEEE Transactions on Power Delivery2011，26，2： | 1 |
| 9 | A two terminal network-based method for discrimination between internal faults and inrush currents显示文摘 | MA Jing WANG Zengping YANG Qixun | 2010 | IEEE Transactions on Power Delivery2010，25，3： | 1 |
| 10 | Reliability evaluation of the communication network in wide-area protection显示文摘 | Dai Zhihui Wang Zengping Jiao Yanjun | 2011 | IEEE Trans on Power Delivery2011，26，4： | 1 |
| 11 | Protection dynamic reliability analysis system based on 3RF technique显示文摘 | DAI Zhihui WANG Zengping | 2011 | IEEE Trans on Power Systems2011，26，3： | 1 |
| 12 | Reliability eval-uation of the communication network in wide-area protection显示文摘 | DAI Zhihui WANG Zengping JIAO Yanjun | 2011 | IEEE Transactions on Power Delivery2011，26，4： | 1 |
| 13 | Protection dynamic reliability analysis system based on 3RF technique显示文摘 | DAI Zhihui WANG Zengping | 2011 | IEEE Trans on Power Systems2011，26，3： | 1 |
| 14 | Protection dynamic reliability analysis system based on 3RF technique显示文摘 | DAI Zhihui WANG Zengping | 2011 | IEEE Transactions on Power Systems2011，26，3： | 1 |
| 15 | GM (1,1) grey prediction of Lorenz chaotic system显示文摘 | Zhang Yagang Xu Yan Wang Zengping | 2009 | Chaos Solitons & Fractals2009，42，2： | 1 |
| 16 | Research on Optimization of Recloser Placement of DG-enhanced Distribution Networks显示文摘 | ZHANG Li XU Yuqin WANG Zengping | | 0，，0885： | 1 |
| 17 | The effect of clinical-grade retinal pigment epithelium derived from human embryonic stem cells using different transplantation strategies显示文摘Dear Editor, Many forms of sight-threatening diseases, including retinitis pigmentosa (RP) and age-related macular degeneration (AMD), are caused by the dysfunction, degeneration and loss of the retinal pigment epithelium (RPE)(Strauss, 2005). RPE cell transplantation may potentially recover or halt disease progression, in which human embryonic stem cells (hESCs) could serve as an unlimited donor source for RPE differentiation, and a few clinical trials have shown the safety and effective of transplantation of hESCs-derived RPE (hESC-RPE) for AMD patients (Schwartz et al., 2012;Schwartz etal., 2015;Song etal., 2015;da Cruz et al., 2018;Kashani et al., 2018;Liu et al., 2018). | Lei Wang Wei Wu Qi Gu Zengping Liu Qiyou Li Zhongwen Li Jinhui Fang Wenjing Liu Jun Wu Ying Zhang Liu Wang Haiwei Xu Wei Li Baoyang Hu Qi Zhou Zhengqin Yin Jie Hao | 2019 | Protein & Cell2019，10，6： | 1 |
| 18 | Cadmium isotope compositions of Fe-Mn nodules and surrounding soils: Implications for tracing Cd sources显示文摘Cadmium (Cd) pollution in agricultural soils has become a severe threat to food security and human health in recent years. Stable Cd isotopes are a potentially powerful tool for identifying the sources of Cd in soils. However, many Earth surface processes, including adsorption, leaching, and biogeochemical cycles in plants, may generate Cd isotope fractionation, which can complicate the potential application of Cd isotopes in tracing the sources of Cd pollution in soils. In this work, the Cd isotope compositions of typical Fe-Mn nodules (FMNs) and surrounding soils in two different soil profiles are investigated. Our results show that the FMNs in lower layers (i.e., C and W horizons) are isotopically lighter than the surrounding soils by –0.114‰ to –0.156‰ (Δ114/110CdFMN-soil). We interpret this fractionation as the result of preferential adsorption of isotopically light Cd onto the surface of goethite. In the upper layers (i.e., P and A horizons), the Δ114/110CdFMN-soil values are more negative in the P horizon (–0.213‰ to –0.388‰) but more positive in the A horizon (0.061‰ to 0.204‰). We interpret these fractionations as the result of natural biogeochemical processes (i.e., leaching and biological cycling) during soil development. Soil leaching preferentially releases isotopically heavy Cd into the underlying soil (i.e., P horizon), shifting the topsoil towards lower δ114/110Cd values but the underlying soils towards higher δ114/110Cd values. Moreover, biological cycling contributes isotopically heavy Cd to the topsoil, probably shifting the topsoil towards higher δ114/110Cd values. Our study demonstrates that the formation of Fe oxyhydroxides, leaching, and biological cycling can considerably modify the soil Cd isotope signature, highlighting the need to consider natural biogeochemical processes when using Cd isotopes to trace heavy metal pollution in soils. | Ting Gao Yuhui Liu Yafei Xia Jian-Ming Zhu Zhengrong Wang Meng Qi Yizhang Liu Zengping Ning Qiqi Wu Wenpo Xu Chengshuai Liu | 2021 | Fundamental Research2021，1，3： | 1 |
| 19 | Bayes monte-carlo assessment method of protection systems reliability based on small failure sample data显示文摘 | DAI Zhihui WANG Zengping JIAO Yanjun | 2014 | IEEE Transactions on Power Delivery2014，29，4： | 1 |
| 20 | Protection dynamic reliability analysis system based on 3 RF technique 显示文摘 | DAI Zhihui WANG Zengping | 2011 | IEEE Transactions on Power Delivery2011，26，3： | 1 |
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