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Journal of Modern Power Systems and Clean Energy 2015年第2期3卷 232-239页

作者： Hong LIU Pingliang ZENG jianyi guo Huiyu WU Shaoyun GE Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjin 300072China Electric Power Research Institute of China Beijing 100192China University of Wisconsin Madison MadisonWI 53706USA

Renewable energy,such as wind and photovoltaic(PV),produces intermittent and variable power *** superimposed on the load curve,it transforms the load curve into a‘load belt’,i.e.a ***,the large scale development of electric vehicle(EV)will also have a significant impact on power grid in general and load characteristics in *** paper aims to develop a controlled EV charging strategy to optimize the peak-valley difference of the grid when considering the regional wind and PV power *** probabilistic model of wind and PV power outputs is *** on the probabilistic model,the method of assessing the peak-valley difference of the stochastic load curve is put forward,and a two-stage peak-valley price model is built for controlled EV *** this basis,an optimization model is built,in which genetic algorithms are used to determine the start and end time of the valley price,as well as the peak-valley ***,the effectiveness and rationality of the method are proved by the calculation result of the example.

关键词： Renewable energy Electric vehicle Controlled electric vehicle(EV)charging Demand side response Peak-valley price

Decay-like fracture diagnosis of composite insulator based on small sample virtual expansion and radar graph mapping

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High Voltage 2023年第2期8卷 347-357页

作者： Ben Shang Youping Fan Yuqing Zhang Lei Yang Zijiang Wang Yating Zhang Zian Zeng jianyi guo School of Electrical Engineering and Automation Wuhan UniversityWuhanChina College of Electrical Engineering and New Energy China Three Gorges UniversityYichangChina China Electric Power Research Institute WuhanChina

Due to the complexity of test procedures and the high cost of measurements,the mechanism of the decay-like fracture is unclear,which brings hard concepts and the small sample ***,it is intractable to establish accurate data-driven *** solve the above mentioned problems,this paper proposes a data-driven modeling method based on radar graph mapping models and virtual sample generation(Radar-VSG).The main idea of the proposed method is to construct and select the most appropriate input features by using radar graph mapping,and to generate virtual samples by using the local outlier factor based on the isometric feature mapping algorithm(Isomap-LOF).To verify the effectiveness of our approach,a set of 27 training samples and 127 testing samples from China Southern Power Grid was *** results suggested the accuracy was up to 100%after adding more than 27 virtual samples,with a 4.75%*** the model has the best generalisation ability for 270 virtual samples,with the root mean square error of *** with support vector machine and four advanced VSG methods,the proposed Radar-VSG can achieve better performance.

关键词： mapping virtual fracture

Prediction of Postbuckling Characteristics of Perforated Metamaterial Cylindrical Shells Under Axial Compression

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Acta Mechanica Solida Sinica 2023年第3期36卷 428-442页

作者： Xueqing Cao jianyi guo Yongqi Li Qifeng Zhang Zhenhuan Zhou Jiabin Sun Xinsheng Xu C.W.Lim State Key Laboratory of Structural Analysis for Industrial Equipment and School of Ocean Science and Technology Dalian University of TechnologyPanjin 124221China AVIC Jonhon Optronic Technology Co. Ltd.Luoyang 471003China State Key Laboratory of Structural Analysis for Industrial Equipment and Department of Engineering Mechanics Dalian University of TechnologyDalian 116024China Department of Architecture and Civil Engineering City University of Hong KongTat Chee AvenueKowloonHong KongChina

Large deflection postbuckling responses of metamaterial cylindrical shells perforated by arrayed circular holes are investigated through a newly proposed theoretical model incorporating with finite element method and *** triggering of an unusual pattern transformation under compressive load(that shows special hyperelastic metamaterial characteristics)contributes to the particularity of the postbucklingmodes,in which the axisymmetric waisted and non-axisymmetric postbuckling configurations of perforated cylindrical shells are *** transformations of postbucking modes are mainly affected by global outline sizes of the shell and local geometrical parameters of *** structural load-carrying capacity for the waisted postbuckling response suffers a sudden drop and recovers when the holes ***,the shell would undergo a sustained fall off under non-axisymmetric postbuckling *** negative Poisson’s ratio induced by pattern transformation plays a key role and a critical effective threshold value exists,inducing the waisted postbuckling *** revealed principles would be of benefit for achieving a controllable structural stability that is usually difficult to implement on those conventional structures.

关键词： Cylindrical shell Negative Poisson’s ratio Postbuckling Waisted deformation

The Design of Digit Recognition Teaching Experiment Based on BP Neural Network

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The Design of Digit Recognition Teaching Experiment Based on...

第25届中国控制与决策会议

作者： Haitao Yu jianyi guo Zhengtao Yu Yantuan Xian Peng Chen School of Information Engineering and Automation Kunming University of Science and Technology Intelligent Information Processing Key Laboratory Kunming University of Science and Technology

ISBN: (纸本)9781467355339

The teaching of pattern recognition course in postgraduates’ study is too theoretical to learn, and lack of teaching experiments. To solve these problems, this paper researches and explores on how to design digit recognition experiment in this *** propose an digit recognition teaching plan based on BP neural network. Firstly, we summarize the development and application of digit recognition, as well as the existing problems during the teaching activities at present;then, we use the case teaching method to explain the experimental procedures,and use the method of BP neural network to recognise digit, including the principle of digit recognition, the principle of image preprocessing and the design of neural network, and so on. With the aims of optimizing the original teaching form, stimulating students’ study interests, training their abilities of practice and scientific research , we introduce the design of experiment. Finally, help students to solve practical problems..

关键词： The practice of pattern recognition course BP neural network Digit recognition

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药品检验机构留样库房管理探讨

首都食品与医药 2024年第4期31卷 113-115页

作者：张丽丽赵婧郭建怡石坚江志杰北京市药品检验研究院国家药品监督管理局仿制药研究与评价重点实验室中药成分分析与生物评价北京市重点实验室北京102206

目的探讨药品检验机构留样库房管理的合理性,以满足受理药品的贮藏要求,保证检验结果准确可靠,推动药品检验机构持续发展.方法分析国内外药品贮藏要求的差异,梳理药品检验机构库房管理现状,探析留样库房管理要点.结果和结论药品检... 详细信息

目的探讨药品检验机构留样库房管理的合理性,以满足受理药品的贮藏要求,保证检验结果准确可靠,推动药品检验机构持续发展.方法分析国内外药品贮藏要求的差异,梳理药品检验机构库房管理现状,探析留样库房管理要点.结果和结论药品检验机构库房设置合理,关键环节的管理经验丰富,应持续探讨未来管理发展趋势.

关键词：药品检验机构留样库房贮藏温度管理趋势

The Instructional Design of Chinese Text Classification based on SVM 25th

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基于佳点集-t分布变异的麻雀算法VSG控制策略研究

第25届中国控制与决策会议

作者： Sichao Wei jianyi guo Zhengtao Yu Peng Chen Yantuan Xian School of Information Engineering and Automation Kunming University of Science and Technology Intelligent Information Processing Key Laboratory Kunming University of Science and Technology

ISBN: (纸本)9781467355339

In order to resolve the comprehension difficulties of theory and implementation about Chinese text classification in " The principle and application of pattern recognition" curriculum for graduate students, this paper introduces the experiment of Chinese text classification into teaching practice. According to the text classification characteristics, we design the experiment scheme about Chinese text classification based on SVM, using word frequency statistics to extract feature and SVM classification algorithm, using vector space model to construct the feature space of text classification. So that readers can deeply understand and master the theoretical knowledge through the open the link, then expand on this basis

关键词： feature selection support vector machine algorithm text classification teaching experiment

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微特电机 2024年第3期52卷 70-77页

作者：闫丽梅洪益民王登银郭建祎赖胜东北石油大学电气信息工程学院大庆163318 河南电力调度控制中心郑州450000

为进一步优化虚拟同步发电机在给定有功扰动或电网频率突变扰动时存在的问题,提出了一种基于佳点集-t分布变异的麻雀算法VSG控制策略,该策略采用佳点集对麻雀种群进行初始化,引入正态分布修改发现者位置更新公式,并在麻雀个体位置更新... 详细信息

为进一步优化虚拟同步发电机在给定有功扰动或电网频率突变扰动时存在的问题,提出了一种基于佳点集-t分布变异的麻雀算法VSG控制策略,该策略采用佳点集对麻雀种群进行初始化,引入正态分布修改发现者位置更新公式,并在麻雀个体位置更新后加入自适应t分布变异策略,利用测试函数验证了ISSA算法具有良好寻优能力。在VSG控制单元中引入ISSA算法,对VSG系统参数进行优化,获得一组符合需求的最优解。利用Simulink对比仿真常规VSG控制策略、SSA优化下的VSG和ISSA优化下的VSG控制策略,验证了当系统出现扰动时,该控制策略对于频率和有功功率振荡均有较好的抑制效果,且相对于另外两种控制策略,在响应速度、超调量、稳定性等方面的表现更优。

关键词：虚拟同步发电机麻雀算法扰动功率振荡

Answer Ranking with Discourse Structure Feature

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China Communications 2012年第3期9卷 110-123页

作者： Mao Cunli Chen Fangqiong Yu Zhengtao guo jianyi Zong Huanyun Kunming Univ Sci & Technol Sch Informat Engn & Automat Kunming 650550 Peoples R China

For the complex questions of Chinese question answering system, we propose an answer extraction method with discourse structure feature combination. This method uses the relevance of questions and answers to learn to rank the answers. Firstly, the method analyses questions to generate the query string, and then submits the query string to search engines to retrieve relevant documents. Sec- ondly, the method makes retrieved documents seg- mentation and identifies the most relevant candidate answers, in addition, it uses the rhetorical relations of rhetorical structure theory to analyze the relationship to determine the inherent relationship between para- graphs or sentences and generate the answer candi- date paragraphs or sentences. Thirdly, we construct the answer ranking model,, and extract five feature groups and adopt Ranking Support Vector Machine （SVM） algorithm to train ranking model. Finally, it re-ranks the answers with the training model and fred the optimal answers. Experiments show that the proposed method combined with discourse structure features can effectively improve the answer extrac- ting accuracy and the quality of non-factoid an- swers. The Mean Reciprocal Rank （MRR） of the an- swer extraction reaches 69.53%.

关键词： complex questions discourse structure learning to rank answer extracting

Naxi-English Bilingual Word Alignment Based on Language Characteristics and Log-Linear Model

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China Communications 2012年第3期9卷 78-86页

作者： Yu Zhengtao Xian Yantuan Tian Wei guo jianyi Zhang Tao Kunming Univ Sci & Technol Sch Informat Engn & Automat Kunming 650550 Peoples R China

We propose a method that can achieve the Naxi-English bilingual word automatic alignment based on a log-linear *** method defines the different Naxi-English structural feature functions,which are English-Naxi interval switching function and Naxi-English bilingual word position transformation *** the manually labeled Naxi-English words alignment corpus,the parameters of the model are trained by using the minimum error,thus Naxi-English bilingual word alignment is achieved *** are conducted with IBM Model 3 as a benchmark,and the Naxi language constraints are *** final experiment results show that the proposed alignment method achieves very good results:the introduction of the language characteristic function can effectively improve the accuracy of the Naxi-English Bilingual Word Alignment.

关键词： word aligrmaent Naxi language English log-linear model interval switching function posi-tion transformation function

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近5年北京市药品抽检情况介绍与思考

首都食品与医药 2024年第11期31卷 93-95页

作者：张丽丽石坚朱晓月李响郭建怡宗美岑江志杰北京市药品检验研究院国家药品监督管理局仿制药研究与评价重点实验室中药成分分析与生物评价北京市重点实验室北京102206

目的为进一步完善药品抽检工作方案提出合理化建议。方法统计北京近5年共计3.25万余批次药品市抽数据,简要分析方案中各分类情况,内容包括检验机构、采样环节、专项抽检、药品来源、药品类型,并回顾分析不合格产品情况及产品质量标准情... 详细信息

目的为进一步完善药品抽检工作方案提出合理化建议。方法统计北京近5年共计3.25万余批次药品市抽数据,简要分析方案中各分类情况,内容包括检验机构、采样环节、专项抽检、药品来源、药品类型,并回顾分析不合格产品情况及产品质量标准情况。结果针对药品监管需求,在积累了多年市抽工作经验的基础上,重点分析近5年北京市药品抽检情况,反映出北京市药品监管体系健全,检验结果整体良好,为进一步完善药品抽检工作方案制定,配合政策和行业变化更好地发挥抽检作用,提出合理化的建议。结论抽检工作可以通过不断加强问题导向、开展专项跟踪监测抽样、扩大抽检信息的使用范围,更好地发挥抽检的监管作用。

关键词：药品抽检工作分析监管建议