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New Hybrid Parallel Algorithm for Variable-sized Batch Splitting Scheduling with Alternative Machines in Job Shops

Chinese Journal of Mechanical Engineering 2010年第4期23卷 484-495页

作者： zhao yanwei WANG Haiyan WANG Wanliang XU Xinli Key Laboratory of Mechanical Manufacture and Automation of Ministry of Education Zhejiang University of Technology Hangzhou 310014 China College of Computer Science and Technology Zhejiang University of Technology Hangzhou 310014 China

The batch splitting scheduling problem has recently become a major target in manufacturing systems, and the researchers have obtained great achievements, whereas most of existing related researches focus on equal-sized and consistent-sized batch splitting scheduling problem, and solve the problem by fixing the number of sub-batches, or the sub-batch sizes, or both. Under such circumstance and to provide a practical method for production scheduling in batch production mode, a study was made on the batch splitting scheduling problem on alternative machines, based on the objective to minimize the makespan. A scheduling approach was presented to address the variable-sized batch splitting scheduling problem in job shops trying to optimize both the number of sub-bathes and the sub-batch sizes, based on differential evolution（DE）, making full use of the finding that the sum of values of genes in one chromosome remains the same before and after mutation in DE. Considering before-arrival set-up time and processing time separately, a variable-sized batch splitting scheduling model was established and a new hybrid algorithm was brought forward to solve both the batch splitting problem and the batch scheduling problem. A new parallel chromosome representation was adopted, and the batch scheduling chromosome and the batch splitting chromosome were treated separately during the global search procedure, based on self-adaptive DE and genetic crossover operator, respectively. A new local search method was further designed to gain a better performance. A solution consists of the optimum number of sub-bathes for each operation per job, the optimum batch size for each sub-batch and the optimum sequence of sub-batches. Computational experiments of four test instances and a realistic problem in a speaker workshop were performed to testify the effectiveness of the proposed scheduling method. The study takes advantage of DE＇s distinctive feature, and employs the algorithm as a solution app

关键词： variable-sized batch splitting differential evolution alternative machines local search

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Application of improved equivalent edge currents in synthetic aperture radar imaging

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Journal of Systems Engineering and Electronics 2010年第4期21卷 566-571页

作者： yanwei zhao Ping Zhou Xiangyang Zhang Min Zhang School of Science Xidian University Xi'an 710071 R R. China National Electromagnetic Scattering Laboratory Beijing 100854 E R. China

Target modeling and scattering function calculating are important prerequisites and groundwork for the synthetic aperture radar（SAR） imaging *** to the difficult problems that normal methods cannot calculate the scattering function of electrically large object under the condition to wideband,an effective method of improved equivalent edge currents is presented and applied to SAR imaging simulation for the first *** method improves calculating velocity and has relatively high *** concrete steps of applying the method are *** way of the simulation experiment,the effectiveness of the method is verified.

关键词： modeling and simulation improved equivalent edge currents synthetic aperture radar image scattering function.

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An optimal hydropower contract load determination method considering both human and riverine ecosystem needs

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Frontiers of Earth Science 2015年第3期9卷 546-554页

作者： Xin'an YIN Zhifeng YANG Cailing LIU yanwei zhao State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing 100875 China

In this research, a new method is developed to determine the optimal contract load for a hydropower reservoir, which is achieved by incorporating environ- mental flows into the determination process to increase hydropower revenues, while mitigating the negative impacts ofhydropower generation on riverine ecosystems. In this method, the degree of na^ral flow regime alteration is adopted as a constraint of hydropower generation to protect riverine ecosystems, and the maximization of mean annual revenue is set as the optimization objective. The contract load in each month and the associated reservoir operating parameters were simultaneously optimized by a genetic algorithm. The proposed method was applied to China＇s Wangkuai Reservoir to test its effectiveness. The new method offers two advantages over traditional studies. First, it takes into account both the economic benefits and the ecological needs of riverine systems, rather than only the economic benefits, as in previous methods. Second, although many measures have been established to mitigate the negative ecological impacts ofhydropower generation, few have been applied to the hydropower planning stage. Thus, since the contract load is an important planning parameter for hydropower generation, influencing both economic benefits and riverine ecosystem protection, this new method could provide guidelines for the establishment of river protection measures at the hydropower planning stage.

关键词： hydropower electricity supply load reservoiroperation river protection

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Multi-scale evaluation of river health in Liao River Basin,China

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Frontiers of Environmental Science & Engineering 2011年第2期5卷 227-235页

作者： Fei XU yanwei zhao Zhifeng YANG Yuan ZHANG State Key Joint Laboratory of Water Environment Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing 100875China River and Coastal Environmental Research Center Chinese Research Academy of Environmental SciencesBeijing 100012China

Previous studies on river health evaluation mainly focused on characterizations at a river-corridor scale and ignored the complex interactions between the river ecosystem and other components of the river *** on the consideration of the interactions among rivers,associated river basin and habitats,an assessment framework with multi-scale indicators was *** index system divided among these three scales to characterize the health of river ecosystems in China’s Liao River Basin was *** pair analysis was applied to integrate the multi-scale indicators and determine the health *** evaluation results indicated that the rivers in the western and eastern zones of the Liao River were classified as sick,and rivers in the main stream of the Liao and Huntai rivers were classified as *** excessive level of disturbances,such as large pollution loads and dense construction of water conservation projects within the river basin,were the main causes of the river health deterioration.

关键词： multi-scale characterization river health evaluation Liao River Basin set pair analysis

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Simulation Experiments in Electromagnetic Tomography Well Logging in Two-phase Flow

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Petroleum Science 2006年第3期3卷 41-44页

作者： Wu Xiling zhao yanwei Research Center of Well Logging School of Resources and Information China University of Petroleum Beijing 102249 China

Electromagnetic Computer Tomography （ECT） is a method to probe the interior of an inhomogeneous medium via surface measurement in a non-linear way. Due to the great differences in conductivity and permittivity between oil and water in the well, Electromagnetic Tomography Well Logging （ETWL）, a new flow imaging measurement system, is proposed to describe the distribution and movement of oil/water two-phase flow in the well by scanning the detected region and applying a suitable data processing algorithm. The results of the numerical simulation and physical modeling show that the system could provide a clear image of the flow profile.

关键词： Oil well two-phase flow electromagnetic tomography well logging

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In Situ Generation of Oxazole Ylide and Interception with Sulfonamide： Construction of Amidines Using Two Diazo Molecules

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Chinese Journal of Chemistry 2018年第9期36卷 857-865页

作者： Jijun Chen Wenhao Long yanwei zhao Haiyan Li Yonggao Zheng Pengcheng Lian Xiaobing Wan Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou Jiangsu 215123 China

A novel generation of oxazole vlide and interception with sulfonamide have been well developed to construct fully substituted amidines. This copper-catalyzed four-component reaction incorporates two diazo molecules to target amidines and shows broad substrate scope, excellent functional groups tolerance and good to excellent yields.

关键词： oxazole ylide sulfonamide diazo compounds amidines

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Association of swallowing problems with frailty in Chinese hospitalized older patients

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International Journal of Nursing Sciences 2020年第4期7卷 408-412,I0004页

作者： Tiantian Wang yanwei zhao Aimin Guo Department of Nursing Chinese Academy of Medical Sciences&Peking Union Medical CollegePeking Union Medical College HospitalBeijingChina School of Nursing Peking Union Medical CollegeBeijingChina

Objective:To estimate the prevalence of dysphagia and frailty among hospitalized older patients and to analyze the relationship between dysphagia and frailty in these ***:Data were collected on 386 participants aged 65 and older in a general hospital from April to December *** were asked to complete a self-designed demographic *** and swallowing function assessments were performed using the Fried frailty phenotype and the 30-ml water swallowing test,*** stepwise logistic regression analyses were used to identify the association between frailty and ***:Dysphagia developed in 31.1%of older people,and 24.4%developed *** was statistically significantly related with *** was more prevalent in frail and pre-frail patients(48.9%and 32.4%,respectively)than those who were non-frail(13.6%).In multivariate analyses,frail(OR,5.420;95%CI,2.684±10.944;P<0.001)and history of choking/coughing while drinking(OR,2.954;95%CI,1.844±4.733;P<0.001)were associated with ***:Frailty is associated with *** attention should be paid to frailty and dysphagia of the elderly and further studies are needed to evaluate the correlated mechanism and develop targeted nursing interventions.

关键词： Aged Deglutition Deglutition disorders Frailty Inpatients

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RHOMBUS THINKING METHOD AND ITS APPLICATION IN SCHEME DESIGN

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Chinese Journal of Mechanical Engineering 2001年第2期14卷 156-159页

作者： zhao yanwei Wang Wanliang Science Research Center,Zhejiang University of Technology Zhang Guoxian Shanghai University 浙江工业大学科学研究中心浙江杭州上海大学上海

Rhombus thinking, a new creative thinking method,is the combination of divergent thinking process and convergent thinking process,in which qualitative analysis is carried out before quantitative analysis This method tries to solve the bottle neck problem in intelligent CAD based on the extension theory The rhombus thinking method to the scheme design of new products is applied In this process, firstly, the matter element expression for the know information are set up, and then a set of matter elements are opened up by matter elements extension method; Finally,the useful information are got by appraisal method of dependent degree It has been successfully applied to the scheme design for the cutter store of machining center Theoretical and experimental results demonstrated fhat the method is much more accurate,objective and efficient than the traditional one

关键词： Extension theory Rhombus thinking method Scheme design Artificial Intelligence

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Flow imaging method of electromagnetic measurement in well logging

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Science China Earth Sciences 2008年第S2期51卷 181-185页

作者： WU XiLing,WANG XiaoXing,zhao yanwei & YANG Mei School of Resource and Information Technology,China University of Petroleum,Beijing 102249,China China Univ Petr Sch Resource & Informat Technol Beijing 102249 Peoples R China

Multiphase flow in an oil well is a dynamic phenomenon of inhomogeneous medium,which should be studied in a nonlinear way. This paper presents an electromagnetic measurement method based on the electrical property differences between oil,gas and water to scan,inverse and show the distribution and condition of multiphase flow. Both numerical simulation and physical experiments have proved that clear images could be obtained by this way.

关键词： well multiphase flow electromagnetic wave flow imaging

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Suitable Weir Heights to Improve the Provision of Environmental Flows in Urban Rivers

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Engineering 2021年第2期7卷 187-194页

作者： Yuanyuan Sun Xin’an Yin Xianqiang Mao Enze Zhang yanwei zhao State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing 100875China

Many studies have been conducted on environmental flow(e-flow)assessment and supply,but e-flow shortages remain common in many urban *** addition to known reasons such as ever-increasing competition among water users and inadequate execution of designed e-flow supply plans,we propose that designing weir heights without explicitly considering e-flows is another major cause of this *** this paper,we suggest that the measures for satisfying e-flows be extended from the water supply stage to the river channel design *** establish a new weir height determination framework that would more effectively satisfy the required *** new framework differs from previous frameworks,in which flood control and water retention are the major concerns and the flow during floods is set as the *** the new framework,e-flow provision and flow velocity maintenance are added concerns and the actual flows for e-flow supply are set as the *** a case study of the new framework’s effectiveness,we applied it to the Shiwuli River,a typical channelized urban river in Hefei,*** old framework specified too-high weir height to meet the e-flow requirements,whereas the new framework offered more reasonable heights that improved e-flow provision.

关键词： Environmental flow Urban rivers River restoration

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