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Journal of Modern Power Systems and Clean Energy 2021年第1期9卷 138-147页

作者： Saniye Maihemuti weiqing wang Haiyun wang Jiahui Wu Xinjiang University UrumqiChina

Large-scale voltage collapse incidences, which result in power outages over large regions and extensive economic losses, are presently common occurrences worldwide. To avoid voltage collapse and operate more safely and reliably, it is necessary to analyze the voltage security operation region(VSOR) of power systems, which has become a topic of increasing interest lately. In this paper, a novel improved particle swarm optimization and recursive least square(IPSO-RLS) hybrid algorithm is proposed to determine the VSOR of a power system. Also, stability analysis on the proposed algorithm is carried out by analyzing the errors and convergence accuracy of the obtained results. Firstly, the voltage stability and VSOR-surface of a power system are analyzed in this paper. Secondly, the two algorithms,namely IPSO and RLS algorithms, are studied *** on this understanding, a novel IPSO-RLS hybrid algorithm is proposed to optimize the active and reactive power,and the voltage allowed to identify the VSOR-surface accurately. Finally, the proposed algorithm is validated by using a simulation case study on three wind farm regions of actual Hami Power Grid of China in DIg SILENT/Power Factory *** error and accuracy of the obtained simulation results are analyzed and compared with those of the particle swarm optimization(PSO), IPSO and IPSO-RLS hybrid algorithms.

关键词： Voltage stability renewable energy improved particle swarm optimization(IPSO) recursive least square(RLS) voltage security operation region(VSOR)

Performance evaluation for sustainability of wind energy project using improved multi-criteria decision-making method

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Journal of Modern Power Systems and Clean Energy 2019年第5期7卷 1165-1176页

作者： Jiahui WU Haiyun wang weiqing wang Qiang ZHANG College of Electrical Engineering Xinjiang UniversityUrumqi 830047China State Grid Xinjiang Electric Power Research Institute Urumqi 830011China

Wind power can be an efficient way to alleviate energy shortage and environmental pollution,and to realize sustainable development in terms of energy *** sustainability assessment of a wind project among its alternatives is a complex task that cannot be solely simplified to environmental or economic *** requires the consideration of its technological and social aspects as well as other *** paper proposes a new method for selecting the most sustainable wind *** method is based on multi-criteria decision-making *** analytic hierarchy process and entropy weight method are combined to determine the weights of evaluation indexes,and an innovative index-weight optimization method based on the Lagrange conditional extremum *** fuzzy technique for order preference by similarity to the ideal solution is applied to rank wind project alternatives considering functionality and proportionality of the ***,the sensitive analysis is applied to verify the robustness of the proposed *** applicability of the method is demonstrated on a case study from China,where three main wind projects are analytically compared and *** results indicated that the sustainable level of calculated wind power can provide a reference point for the planning and operation of the wind *** results show that the proposed method is of both theoretical significance and practical application in engineering.

关键词： Analytic hierarchy process Comprehensive evaluation index Entropy method Fuzzy technique Order preference Wind power sustainability level

User Account Linkage Across Multiple Platforms with Location Data

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Journal of Computer Science & Technology 2020年第4期35卷 751-768页

作者： Wei Chen weiqing wang Hongzhi Yin Jun-Hua Fang Lei Zhao Institute of Artificial Intelligence School of Computer Science and TechnologySoochow UniversitySuzhou 215006China Faculty of Information Technology Monash UniversityMelbourne 3000Australia School of Information Technology and Electrical Engineering The University of QueenslandBrisbane 4072Australia

Linking user accounts belonging to the same user across different platforms with location data has received significant attention,due to the popularization of GPS-enabled devices and the wide range of applications benefiting from user account linkage(e.g.,cross-platform user profiling and recommendation).Different from most existing studies which only focus on user account linkage across two platforms,we propose a novel model ULMP(i.e.,user account linkage across multiple platforms),with the goal of effectively and efficiently linking user accounts across multiple platforms with location *** of the practical significance brought by successful user linkage across multiple platforms,this task is very challenging compared with the ones across two *** major challenge lies in the fact that the number of user combinations shows an explosive growth with the increase of the number of *** tackle the problem,a novel method GTkNN is first proposed to prune the search space by efficiently retrieving top-k candidate user accounts indexed with well-designed spatial and temporal index ***,in the pruned space,a match score based on kernel density estimation combining both spatial and temporal information is designed to retrieve the linked user *** extensive experiments conducted on four real-world datasets demonstrate the superiority of the proposed model ULMP in terms of both effectiveness and efficiency compared with the state-of-art methods.

关键词： user account linkage multiple platform check-in record

Study on the dynamic variation of the secondary metabolites in Viscum coloratum using targeted metabolomics

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Chinese Journal of Natural Medicines 2023年第4期21卷 308-320页

作者： ZHANG Ruizhen DUAN Rong wang weiqing YU Zhiguo LI Yun ZHAO Yunli Department of Pharmaceutical Analysis School of PharmacyShenyang Pharmaceutical UniversityShenyang 110016China Department of Pharmacy the Second Hospital of Dalian Medical UniversityDalian 116023China

Viscum coloratum(Kom.)Nakai is a well-known medicinal ***,the optimal harvest time for *** is *** studies were performed to analyze compound variation during storage and to improve post-harvest quality *** study aimed to comprehensively evaluate the quality of *** in different growth stages,and determine the dynamic variation of ***-performance liquid chromatography tandem mass spectrometry was used to quantify 29 compounds in *** harvested in six growth periods,and the associated biosynthetic pathways were *** accumulation of different types of compounds were analyzed based on their synthesis *** relational analysis was used to evaluate the quality of *** across different *** compound variation during storage was analyzed by a high-temperature high-humidity accelerated *** results showed that the quality of *** was the hightest in March,followed by November,and became the lowest in *** storage,compounds in downstream steps of the biosynthesis pathway were first degraded to produce the upstream compounds and some low-molecular-weight organic acids,leading to an increase followed by a decrease in the content of some compounds,and resulted in a large gap during the degradation time course among different *** to the rapid rate and large degree of degradation,five compounds were tentatively designated as“early warning components”for quality *** report provides reference for better understanding the biosynthesis and degradation of metabolites in *** and lays a theoretical foundation for rational application of *** and better quality control of *** during storage.

关键词： Viscum coloratum Harvesting period Storage Plant metabolomics Quality control

Conformations and adsorption behavior of poly(allylamine hydrochloride) studied by single molecule force spectroscopy

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Chinese Science Bulletin 2008年第1期53卷 22-26页

作者： YU Ying wang Fang SHI weiqing wang LiYan wang WenBin SHEN JiaCong Key Lab of Supramolecular Structure and Materials Jilin University Changchun 130012 China

Poly(allylamine hydrochloride) (PAH), which is frequently used in fabricating polyelectrolyte multilayer films, was studied by single molecule force spectroscopy (SMFS). Plenty of force-extension curves with a long plateau were obtained in water, indicating that train-like structure was predominant when PAH was adsorbed on the substrate. It was found that the peak-type force-extension curves of PAH in water were not able to be fitted by the modified freely-jointed chain model. Additionally, there was a flat region in the derivative of force-extension curves. Thus, it was inferred that PAH chain in water was in a special conformation and underwent a "conformational transition" under the stretching of an external force. This phenomenon did not appear in the SMFS experiment in 1 mol/L urea solution, which indi-cated that urea was able to break the special conformation.

关键词：光谱学单分子吸附丙烯胺

A New Method of Image Restoration Technology Based on WGAN

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Computer Systems Science & Engineering 2022年第5期41卷 689-698页

作者： Wei Fang Enming Gu Weinan Yi weiqing wang Victor S.Sheng School of Computer&Software Engineering Research Center of Digital ForensicsMininstry of EducationNanjing University of Information Science&TechnologyNanjing210044China Provincial Key Laboratory for Computer Information Processing Technology Soochow UniversitySuzhou215325China Texas Tech University USA

With the development of image restoration technology based on deep learning,more complex problems are being solved,especially in image semantic inpainting based on ***,image semantic inpainting techniques are becoming more ***,due to the limitations of memory,the instability of training,and the lack of sample diversity,the results of image restoration are still encountering difficult problems,such as repairing the content of glitches which cannot be well integrated with the original ***,we propose an image inpainting network based on Wasserstein generative adversarial network(WGAN)*** the corresponding technology having been adjusted and improved,we attempted to use the Adam algorithm to replace the traditional stochastic gradient descent,and another algorithm to optimize the training used in recent *** evaluated our algorithm on the ImageNet *** obtained high-quality restoration results,indicating that our algorithm improves the clarity and consistency of the image.

关键词： Image restoration WGAN DCGAN context semantic

Kinetics of Evaporation of Zn and Pb from Carbon-bearing Pellets Made of Dust Containing Zn-Pb-Fe Oxides

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International Journal of Minerals,Metallurgy and Materials 2000年第3期14卷 178-183页

作者： weiqing Chen, Dongyan wang, Rongzhang Zhou, Zongcai Lin (Metallurgy School, University of Science and Technology Beijing, Beijing 100083, China) Metallurgy School University of Science and Technology Beijing Beijing 100083 China

The influence of reduction temperature, size of coal powder and the carbon content on the evaporation rates of Zn and Pb in pellets made of ZnO-PbO-FeO bearing dust has been investigated between 1100-1300℃. The evaporation rate of Zn and Pb obtained from the experiments has been analyzed with kinetic models. The results show that the control step for evaporation of Zn is reduction reaction of ZnO by CO at the interface，and that the evaporation rate of Pb is controlled by the volatilization of reduction products, i.e. liquid lead. The overall apparent activation energies of Zn and Pb evaporation from the pellet are 79.42kJ/mol and 88.74kJ/mol respectively.

关键词： Zn-Pb-bearing dust carbon-containing pellet evaporation kinetics

Shale pore characteristics of Shahejie Formation: Implication for pore evolution of shale oil reservoirs in Dongying sag, north China

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Petroleum Research 2019年第2期4卷 113-124页

作者： Shun Zhang Huimin Liu Min wang Xinjin Liu Huilai Liu Youshu Bao weiqing wang Runze Li Xin Luo Zhengwei Fang Research Institute of Petroleum Exploration and Development Sinopec Shengli Oilfield CompanyShandongDongying257022China Postdoctor Scientific Research Stations Sinopec Shengli Oilfield CompanyShandongDongying257000China Petroleum Development Center of Shengli Oilfield ShandongDongying257022China Petroleum Development Center of Shengli Oilfield Beijing100007China Chongqing Gas Field of PetroChina Southwest Oil&Gasfield Company Chongqing400021China

The pore characteristics of shale reservoirs in the lower submember of Member 3 to upper submember of Member 4 of Shahejie Formation in Dongying sag are analyzed,influences of mineral content and organic matter content on porosity and pore size are also investigated,and through the diagenetic thermal simulation experiment,the main pore evolution is further *** results show that the pore structure of shale reservoirs is complex,the micron-nanometer pores can storage liquid hydrocarbons,and the free-phase crude oil is mainly distributed in intergranular dissolution pores of calcite,recrystallized intergranular pores,intergranular shrinkage fractures of clay mineral which have large pore *** minerals and organic matter content directly influence porosity and pore size of shale reservoirs,relationship between porosity and content of felsic mineral as well as content of organic matter content is linear and positive,while relationship between content of carbonated mineral is *** the buried depth from 2500 to 3500 m,concentration of organic acid from hydrocarbon generation and expulsion of organic matter,increasing range of pressure coefficient,are well corresponding to highporosity intervals;pore formation in shale oil reservoirs are almost controlled by diagenetic evolution of clay minerals;framework storage spaces formed by carbonate grain crystals as well as intergranular and intergranular dissolution pores of carbonate increases porosity of shale oil reservoirs;local increase of porosity at the depth of 3500e3800 m is mainly caused by coupling of hydrocarbon-generating overpressure and dissolution,and size,distribution and connectivity of pores are enhanced obviously.

关键词： Shale oil Pore and fracture Diagenesis Clay mineral transformation Dissolution Recrystallization Hydrocarbon-generation and acid expulsion Paleogene Dongying sag

Decomposition of the Coarse Primary Carbides in the M2 High Speed Steels Containing Silicon

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稀有金属材料与工程 2011年第S3期40卷 38-42页

作者： wang weiqing, Pan Fusheng, Tang Aitao, Liu Tingting, Liu Shengming, Luo Suqin Chongqing University, Chongqing 400030, China Chongqing Univ Coll Mat Sci & Engn Chongqing 400030 Peoples R China

The carbides of high speed steels have a determinant influence on their properties, and the control of the carbides has been a hot topic in development of high speed steels. The decomposition of the coarse primary M2C carbide in the as-cast M2 high speed steels with Silicon addition and without Silicon addition was investigated by using optical microscope, scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction analysis. Both the M2 high speed steel and the M2-1Si steel were heated at 1000 and 1150 ℃, the soaking time were 15 min, 30 min, 1 h, 2 h and 4 h, respectively. The results showed that the decomposition of M2C carbides to M6C and MC carbides occurred during heating at 1000 ℃,the degree of the decomposition became obvious with the increase of heating time or addition of silicon. After the tested steels were heated at 1000 ℃ for 1 h, the primary M2C carbides in the M2-1Si steel had decomposed into M6C and MC completely, but the decomposition of the primary M2C carbides in the M2 steel was incomplete. Silicon addition was found to accelerate the decomposition of the coarse primary M2C carbides during heating and to inhibit the growth and coarseness of the decomposition products.

关键词： M2 high speed steels carbides silicon decomposition

Physicochemical difference of coffee beans with different species,production areas and roasting degrees

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Beverage Plant Research 2022年第1期2卷 50-57页

作者： Xinrong Liu Yanan Fei weiqing wang Shumin Lei Chao Cheng Zhiqiang Xing Jiahe Foods Industry Co. LtdSuzhou 215000China Suzhou Kingmao Coffee Co. LtdSuzhou 215000China

In recent decades,the demand for coffee has seen a continuous increase,and the aroma and flavor of coffee has been widely *** current research chose coffee beans of two species(Coffea arabica and ***)from five production areas(Brazil,India,Indonesia,Uganda and Vietnam)with four different roasting degrees(medium light,medium,medium dark and dark),to investigate the difference on physicochemical *** results showed that Arabica coffee beans had higher concentrations of fat and organic acids,and total amount of volatile compounds,whereas Robusta beans had higher concentrations of *** the increase of roasting degree,the concentrations of protein,fat,organic acids,and the total amount of volatile compounds of coffee beans increased,while the concentrations of chlorogenic acid compounds *** discriminant analysis indicated that the tested coffee beans could be clearly discriminated by species and roasting degrees,but not by production *** results of this research conclude the physicochemical difference of Arabica and Robusta beans with different roasting *** results can provide a theoretical basis for coffee bean selection for the relevant industries.

关键词： properties. difference coffee