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| 1 | Minimum Load-curtailment in Transmission Network Planning Considering Integrated Wind Farms显示文摘提出应用鲁棒线性优化理论来研究电网规划中含多个风电场的最小切负荷量计算问题,为含多个风电场的系统安全性研究提供了一条新的思路。根据Seng-Cheol Kang提出的鲁棒线性优化理论,建立电网规划中考虑风电场影响的最小切负荷量模型。该模型以出力上下限和出力期望值来描述风电场的出力,最终转化为一确定性的线性规划问题并进行求解。在计及或不计及发电机调整的情况下,该模型均能够给出最安全的切负荷方案,除此以外还能给出更多介于最可靠与最经济之间的切负荷方案,实现灵活决策;在计及发电机出力可调的情况下,该模型能够给出相应的发电机出力方案;该模型能够初步给出各种切负荷方案下电网规划方案的可靠程度。基于修正的Garver’s 6节点系统和修正的巴西南部46节点系统算例测试结果验证了该方法的有效性。 | CHEN Yan WEN Jinyu CHENG Shijie | 2011 | 中国电机工程学报2011，31，34： | 14 |
| 2 | Minimum energy storage for power system with high wind power penetration using p-efficient point theory显示文摘Minimum energy storage(ES)and spinning reserve(SR)for day-ahead power system scheduling with high wind power penetration is significant for system operations.A chance-constrained energy storage optimization model based on unit commitment and considering the stochastic nature of both the wind power and load demand is proposed.To solve this proposed chance-constrained model,it is first converted into a deterministic-constrained model using p-efficient point theory.A single stochastic net load variable is developed to represent the stochastic characteristics of both the wind power and load demand for convenient use with the p-efficient point theory.A probability distribution function for netload forecast error is obtained via the Kernel estimation method.The proposed model is applied to a wind-thermal-storage combined power system.A set of extreme scenarios is chosen to validate the effectiveness of the proposed model and method.The results indicate that the scheduled energy storage can effectively compensate for the net load forecast error,and the increasing wind power penetration does not necessarily require a linear increase in energy storage. | LI JingHua WEN JinYu CHENG ShiJie WEI Hua | 2014 | Science China(Information Sciences)2014，57，12： | 9 |
| 3 | Generalized gradient projection neural networks for nonsmooth optimization problems显示文摘Generalized gradient projection neural network models are proposed to solve nonsmooth convex and nonconvex nonlinear programming problems over a closed convex subset of R n . By using Clarke’s generalized gradient, the neural network modeled by a differential inclusion is developed, and its dynamical behavior and optimization capabilities both for convex and nonconvex problems are rigorously analyzed in the framework of nonsmooth analysis and the differential inclusion theory. First for nonconvex optimization problems, the quasi convergence results similar to those achieved by previous work are proved. For convex optimization problems, the global convergence results are proved, i.e. any trajectory of the neural network converges to an asymptotically stable equilibrium point, which is an optimal solution of the primal problem whenever it exists. This result remains valid even if the initial condition is chosen outside the feasible set. In addition, an asymptotic control result involving a Tykhonov like regularization shows that any trajectory of the revised neural network can be forced to converge toward a particular optimal solution of the primal problem. Finally, two simulation optimization algorithms for solving the optimization and control problems are designed respectively, and three typical simulation experiments are illustrated to present the accuracy and efficiency of theoretical convergence results of this paper. | LI GuoCheng SONG ShiJi WU Cheng | 2010 | Science China(Information Sciences)2010，53，5： | 9 |
| 4 | Probabilistic small signal stability analysis of power system with wind power and photovoltaic power based on probability collocation method显示文摘Recently, with increasing improvements in the penetration of wind power and photovoltaic power in the world, probabilistic small signal stability analysis(PSSSA) of a power system consisting of multiple types of renewable energy has become a key problem. To address this problem, this study proposes a probabilistic collocation method(PCM)-based PSSSA for a power system consisting of wind farms and photovoltaic farms. Compared with the conventional Monte Carlo method, the proposed method meets the accuracy and precision requirements and greatly reduces the computation; therefore, it is suitable for the PSSSA of this power system. Case studies are conducted based on a 4-machine 2-area and New England systems, respectively. The simulation results show that, by reducing synchronous generator output to improve the penetration of renewable energy, the probabilistic small signal stability(PSSS) of the system is enhanced. Conversely, by removing part of the synchronous generators to improve the penetration of renewable energy, the PSSS of the system may be either enhanced or deteriorated. | Cai Yan Linli Zhou Wei Yao Jinyu Wen Shijie Cheng | 2019 | Global Energy Interconnection2019，2，1： | 9 |
| 5 | Research progresses of cathodic hydrogen evolution in advanced lead–acid batteries显示文摘Integrating high content carbon into the negative electrodes of advanced lead–acid batteries effectively eliminates the sulfation and improves the cycle life,but brings the problem of hydrogen evolution,which increases inner pressure and accelerates the water loss.In this review,the mechanism of hydrogen evolution reaction in advanced lead–acid batteries,including lead–carbon battery and ultrabattery,is briefly reviewed.The strategies on suppression hydrogen evolution via structure modifications of carbon materials and adding hydrogen evolution inhibitors are summarized as well.The review points out effective ways to inhibit hydrogen evolution and prolong the cycling life of advanced lead–acid battery,especially in high-rate partial-state-of-charge applications. | Feng Wang Chen Hu Min Zhou Kangli Wang Jiali Lian Jie Yan Shijie Cheng Kai Jiang | 2016 | Science Bulletin2016，61，6： | 8 |
| 6 | High temperature SMES for improving power system stabilities显示文摘Superconducting magnetic energy storage (SMES) system has been proven very effective to improve power system stabilities. It is realized with superconductivity technology, power electronics and control theory. In order to promote the applica-tion of such kind control device and to further investigate the properties of the controller, a detail mathematic model of such control device is developed. Based on the developed model, extensive analysis including time domain simulation is carried out to investigate the characteristic of the SMES to compensate the unba- lanced dynamic active and reactive power of AC power system. The capability of SMES to increase power system transient and small signal perturbation stabilities are analyzed. A prototype SMES is developed, in which the conduction cooling and the high temperature superconductive techniques are used. The performance of the prototype is experimentally investigated in a laboratory environment. Very en-couraging results are obtained. After a brief introduction of the SMES control sys-tem and the principle of its capability to improve power system stabilities, the de-tails of the mathematic model, the theoretical analysis, the developed device and the experiment test results are all given in this paper. | CHENG ShiJie TANG YueJin | 2007 | Science China(Technological Sciences)2007，50，4： | 5 |
| 7 | Reverse triple I method of restriction for fuzzy reasoning显示文摘A theory of reverse triple I method of restriction for implication operator R0 is proposed.And the general computation formulas of infimum for fuzzy modus ponens and supremum for fuzzy modus tollens of a-reverse triple I method of restriction are obtained respectively. | SONG Shiji and WU Cheng(Department of Automation, Tsinghua University, Beijing 100084, China) | 2002 | Progress in Natural Science:Materials International2002，12，5： | 3 |
| 8 | Bifurcation analysis for an SMIB power system with series capacitor compensation associated with sub-synchronous resonance显示文摘In this paper,an introduction to the bifurcation theory and its applicability to the study of sub-synchronous resonance (SSR) phenomenon in power system are presented. The continuation and bifurcation analysis software AUTO97 is adopted to investigate SSR for a single-machine-infinite-bus power system with series capacitor compensation. The investigation results show that SSR is the result of unstable limit cycle after bifurcation. When the system exhibits SSR, some complex periodical orbit bifurcations, such as torus bifurcation and periodical fold bifurcation, may happen with the variation of limit cycle. Furthermore, the initial operation condition may greatly influence the ultimate state of the system. The time-domain simulation is carried out to verify the effectiveness of the results obtained from the bifurcation analysis. | DUAN XianZhong WEN JinYu CHENG ShiJie | 2009 | Science China(Technological Sciences)2009，52，2： | 3 |
| 9 | Subgradient-based feedback neural networks for non-differentiable convex optimization problems显示文摘This paper developed the dynamic feedback neural network model to solve the convex nonlinear programming problem proposed by Leung et al. and introduced subgradient-based dynamic feedback neural networks to solve non-differentiable convex optimization problems. For unconstrained non-differentiable convex optimization problem, on the assumption that the objective function is convex coercive, we proved that with ar- bitrarily given initial value, the trajectory of the feedback neural network constructed by a projection subgradient converges to an asymptotically stable equilibrium point which is also an optimal solution of the primal unconstrained problem. For constrained non-differentiable convex optimization problem, on the assumption that the objective function is convex coercive and the constraint functions are convex also, the energy func- tions sequence and corresponding dynamic feedback subneural network models based on a projection subgradient are successively constructed respectively, the convergence theorem is then obtained and the stopping condition is given. Furthermore, the effective algorithms are designed and some simulation experiments are illustrated. | LI Guocheng SONG Shiji WU Cheng | 2006 | Science in China(Series F)2006，49，4： | 3 |
| 10 | Characteristics of a prototype CdZnTe detector显示文摘Cadmium zinc telluride(CZT)is a preferred material for X-ray and gamma-ray detector.Thanks to the relatively high atomic number,high density and wide band-gap,CZT detector possesses sharp energy resolution and high detection efficiency without cryogenic cooling.We have developed a CdZnTe detector with an energy resolution of 3.45%(FWHM)at 59.54 keV at room temperature,and it is used for X-ray fluorescence analysis.In this paper, leakage current,energy resolution and long term stability of the CZT detector are discussed. | XU Huichao CHENG Cheng ZHAO Cuilan ZHANG Jinzhou PU Shijie | 2007 | Nuclear Science and Techniques2007，18，6： | 3 |
| 11 | Study on risk analysis of supply chain enterprises显示文摘The sources of supply chain enterprise risk from different aspects including material flow, information flow, cash flow and partner relationship is analyzed. Measures for risk reduction have also been summarized from the aspects of risk sharing, information sharing, change of inventory control mode, and supply chain flexibility. Finally, problems in current research on supply chain risk management are pointed out and a discussion on future research trend is presented. | Wu Xiaohui Zhong Xiaobing Song Shiji Wu Cheng | 2006 | Journal of Systems Engineering and Electronics2006，17，4： | 2 |
| 12 | CO flux of soil respiration in natural recovering karst abandoned farmland in Southwest China显示文摘To estimate carbon sequestration potential in the karst area,soil respiration in a natural recovering karst abandoned farmland in Shawan,Puding,Guizhou,southwest China was continuously and automatically monitored for more than two years.The results show that the CO2flux of soil respiration(2.63±1.89 lmol m^-2s-^1)is higher in the karst area than in non-karst areas under similar conditions but that regional value(1.32 lmol m-2s-1)is lower because of larger rock fragment coverage(~50%).A the same time,the temperature sensitivity of soil respiration(Q10)in this study area is significantly higher than that of non-karst areas under similar conditions.Soil respiration has an obvious temporal variation,which is reflected in a significant exponential relationship between soil respiration and soil temperature,but the relationship between soil respiration and soil moisture is very complex.Especially soil respiration has an obvious spatial variation,which is likely affected by different diffusion or water-rock reaction processes. | Yanwei Wang Weijun Luo Guangneng Zeng Hanling Yang Meifang Wang Yina Lyu Anyun Cheng Lin Zhang Xianli Cai Jia Chen Shijie Wang | 2020 | Acta Geochimica2020，39，4： | 2 |
| 13 | Correlation between cold and hot pattern in traditional Chinese medicine and gene expression profiles in rheumatoid arthritis显示文摘Clinical manifestations of rheumatoid arthritis(RA)are diversified,and based on the manifestations,the patients with RA could be classified into different patterns under traditional Chinese medicine.These patterns decide the selection of herbal prescription,and thus they can help find a subset of rheumatoid arthritis patients for a type of therapy.In the present study,we combine genome-wide expression analysis with methods of systems biology to identify the functional gene networks for the sets of clinical symptoms that comprise the major information for pattern classification.Clinical manifestations in rheumatoid arthritis were clustered with factor analysis,and two factors(similar to cold and hot patterns in traditional Chinese medicine)were found.Microarray technology was used to reveal gene expression profiles in CD4^(+)T cells from 21 rheumatoid arthritis patients.Protein-protein interaction information for these genes from databases and literature data was searched.The highly-connected regions were detected to infer significant complexes or pathways in this protein-protein interaction network.The significant pathways and function were extracted from these subnetworks using the Biological Network Gene Ontology tool.The genes significantly related to hot and cold patterns were identified by correlations analysis.MAPK signalling pathway,Wnt signaling pathway,and insulin signaling pathway were found to be related to hot pattern.Purine metabolism was related to both hot and cold patterns.Alanine,aspartate,and tyrosine metabolism were related to cold pattern,and histindine metabolism and lysine degradation were related to hot pattern.The results suggest that cold and hot patterns in traditional Chinese medicine were related to different pathways,and the network analysis might be used for identifying the pattern classification in other diseases. | Miao Jiang Cheng Xiao Gao Chen Cheng Lu Qinglin Zha Xiaoping Yan Weiping Kong Shijie Xu Dahong Ju Pu Xu Youwen Zou Aiping Lu | 2011 | Frontiers of Medicine2011，5，2： | 2 |
| 14 | Infinitesimal dividing modeling method for dual suppliers inventory model with random lead times显示文摘As one of the basic inventory cost models,the(Q,r)inventory cost model of dual suppliers with random procurement lead time is mostly formulated by using the concepts of'effective lead time'and'lead time demand',which may lead to an imprecise inventory cost.Through the real-time statistic of the inventory quantities, this paper considers the precise(Q,r)inventory cost model of dual supplier procurement by using an infinitesimal dividing method.The traditional modeling method of the inventory cost for dual supplier procurement includes complex procedures.To reduce the complexity effectively,the presented method investigates the statistics properties in real-time of the inventory quantities with the application of the infinitesimal dividing method.It is proved that the optimal holding and shortage costs of dual supplier procurement are less than those of single supplier procurement respectively.With the assumption that both suppliers have the same distribution of lead times,the convexity of the cost function per unit time is proved.So the optimal solution can be easily obtained by applying the classical convex optimization methods.The numerical examples are given to verify the main conclusions. | Ji Pengcheng Song Shiji Wu Cheng | 2009 | Journal of Systems Engineering and Electronics2009，20，3： | 2 |
| 15 | SLC1A1-mediated cellular and mitochondrial influx of R-2-hydroxyglutarate in vascular endothelial cells promotes tumor angiogenesis in IDH1-mutant solid tumors显示文摘Muta nt isocitrate dehydrog en ase 1(mlDH1)drives tumorigenesis via produci ng on cometabolite R-2-hydroxyglutarate(R-2-HG)across various tumor types.However,mlDHl in hibitors appear only effective in hematological tumors.The therapeutic ben efit in solid tumors remains elusive,likely due to the complex tumor microenvironment.In this study,we discover that R-2-HG produced by IDH1-mutant tumor cells is preferentially imported into vascular endothelial cells and remodels mitochondrial respiration to promote tumor angiogenesis,conferring a therapeutic vulnerability in IDH1-mutant solid tumors.Mechanistically,SLC1 Alz a Na'-depe ndent glutamate tran sporter that is prefere ntially expressed in en dothelial cells,facilitates the in flux of R-2-HG from the tumor microenvironment into the endothelial cells as well as the intracellular trafficking of R-2-HG from cytoplasm to mitochondria.R-2-HG hijacks SLC1A1 to promote mitochondrial Na^(+)/Ca^(2+)exchange,which activates the mitochondrial respiratory chain and fuels vascular en dothelial cell migratio n in tumor an giogenesis.SLC1A1 deficiency in mice abolishes mlDHl-promoted tumor an giogenesis as well as the therapeutic benefit of mlDHl in hibitor in solid tumors.Moreover,we report that HH2301,a newly discovered mlDHl inhibitor,shows promising efficacy in treating IDH1-mutant cholangiocarcinoma in preclinical models.Together,we identify a new role of SLC1A1 as a gatekeeper of R-2-HG-mediated crosstalk between IDH1-mutant tumor cells and vascular en dothelial cells,and dem on strate the therapeutic potential of mlDHl in hibitors in treating IDH1-muta nt solid tumors via disrupting R-2-HG-promoted tumor angiogenesis. | Xiaomin Wang Ziqi Chen Jun Xu Shuai Tang Nan An Lei Jiang Yixiang Zhang Shaoying Zhang Qingli Zhang Yanyan Shen Shijie Chen Xiaojing Lan Ting Wang Linhui Zhai Siyuwei Cao Siqi Guo Yingluo Liu Aiwei Bi Yuehong Chen Xiameng Gai Yichen Duan Ying Zheng Yixian Fu Yize Li Liang Yuan Linjiang Tong Kun Mo Mingcheng Wang Shu-Hai Lin Minjia Tan Cheng Luo Yi Chen Jia Liu Qiansen Zhang Leping Li Min Huang | 2022 | Cell Research2022，32，7： | 2 |
| 16 | Probabilistic load flow method based on Nataf transformation and Latin hypercube sampling显示文摘 | CHEN Yan WEN Jinyu CHENG Shijie | 2013 | IEEE Trans on Sustainable Energy2013，4，2： | 1 |
| 17 | Ethynyl-linked perylene bisimide based electron acceptors for non-fullerene organic solar cells显示文摘In this work, star-shaped perylene bisimide(PBI) derivatives with spiro-aromatic cores linked with ethynyl units were developed as electron acceptors for non-fullerene organic solar cells. The ethynyl linkers were found to enhance the planarity of the conjugated backbone, resulting in high electron mobilities and near-infrared absorption. The ethynyl-linked PBI acceptors showed high power conversion efficiencies(PCEs) up to 4.27% due to the high short-circuit current density(J_(sc)) of 8.52 mA/cm^2 and fill factor(FF) of 0.59, while the PBI acceptor without ethynyl units provided a low PCE of 3.57% in nonfullerene solar cells. The results demonstrate that ethynyl units can be applied into designing new PBI electron acceptors with improved charge transport properties and photovoltaic performance. | Changshi Yu Yunhua Xu Shijie Liang Xudong Jiang Guitao Feng Cheng Li Weiwei Li | 2018 | Chinese Chemical Letters2018，29，2： | 1 |
| 18 | Amorphous molybdenum sulfide and its Mo-S motifs:Structural characteristics,synthetic strategies,and comprehensive applications显示文摘Amorphous materials are one kind of nonequilibrium materials and have become one of the most active research fields.Compared with crystalline solids,the theory of amorphous materials is still in infancy because their characteristic of atomic arrangement is more like liquid and has no long-range periodicity.Recently,as the representative of amorphous materials,amorphous molybdenum sulfide(a-MoS_(x))with unique physical and chemical properties has been studied extensively.However,considerable debate surrounds the structure–property relationships of a-MoS_(x)owing to its diverse Mo-S motifs.Herein,we summarize recent discoveries and research results regarding a-MoS_(x),whose structural characteristics,synthetic strategies,formation criteria,and comprehensive applications are discussed in detail.Finally,this review is ended with our personal insights and critical outlooks over the development of a-MoS_(x). | Cheng Chang Longlu Wang Lingbin Xie Weiwei Zhao Shujuan Liu Zechao Zhuang Shijie Liu Jianmin Li Xia Liu Qiang Zhao | 2022 | Nano Research2022，15，9： | 1 |
| 19 | Degradation mechanism analysis of LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2) single crystal cathode materials through machine learning显示文摘LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2)(NCM523)has become one of the most popular cathode materials for current lithium-ion batteries due to its high-energy density and cost performance.However,the rapid capacity fading of NCM severely hinders its development and applications.Here,the single crystal NCM523 materials under different degradation states are characterized using scanning transmission electron microscopy(STEM).Then we developed a neural network model with a two-sequential attention block to recognize the crystal structure and locate defects in STEM images.The number of point defects in NCM523 is observed to experience a trend of increasing first and then decreasing in the degradation process.The space between the transition metal columns shrinks obviously,inducing dramatic capacity decay.This analysis sheds light on the defect evolution and chemical transformation correlated with layered material degradation.It also provides interesting hints for researchers to regenerate the electrochemical capacity and design better battery materials with longer life. | Wuxin Sha Yaqing Guo Danpeng Cheng Qigao Han Ping Lou Minyuan Guan Shun Tang Xinfang Zhang Songfeng Lu Shijie Cheng Yuan-Cheng Cao | 2022 | npj Computational Materials2022，，1： | 1 |
| 20 | Home network power-line communication signal processing based on wavelet packet analysis 显示文摘 | He Haibo Cheng Shijie Zhang Youbing | 2005 | IEEE Transactions on Power Delivery2005，20，3： | 1 |
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