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Journal of Systems Engineering and Electronics 2010年第2期21卷 239-243页

作者： Guangmin Wang Bing Jiang kejun zhu Zhongping Wan School of Economics and Management China University of Geosciences Wuhan 430074 R R. China School of Mathematics and Statistics Wuhan University Wuhan 430072 R R. China

A global convergent algorithm is proposed to solve bilevel linear fractional-linear programming, which is a special class of bilevel programming. In our algorithm, replacing the lower level problem by its dual gap equaling to zero, the bilevel linear fractional-linear programming is transformed into a traditional sin- gle level programming problem, which can be transformed into a series of linear fractional programming problem. Thus, the modi- fied convex simplex method is used to solve the infinite linear fractional programming to obtain the global convergent solution of the original bilevel linear fractional-linear programming. Finally, an example demonstrates the feasibility of the proposed algorithm.

关键词： bilevel linear fractional-linear programming convex simplex method dual problem.

Review of small aspheric glass lens molding technologies

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Frontiers of Mechanical Engineering 2017年第1期12卷 66-76页

作者： Shaohui YIN Hongpeng JIA Guanhua ZHANG Fengjun CHEN kejun zhu National Engineering Research Center for High Efficiency Grinding Hunan University Changsha 410082 China School of Mechanical Engineering Xiangtan University Xiangtan411105 China

Aspheric lens can eliminate spherical aberra- tions, coma, astigmatism, field distortions, and other adverse factors. This type of lens can also reduce the loss of light energy and obtain high-quality images and optical characteristics. The demand for aspheric lens has increased in recent years because of its advantageous use in the electronics industry, particularly for compact, portable devices and high-performance products. As an advanced manufacturing technology, the glass lens molding process has been recognized as a low-cost and high-efficiency manufacturing technology for machining small-diameter aspheric lens for industrial production. However, the residual stress and profile deviation of the glass lens are greatly affected by various key technologies for glass lens molding, including glass and mold-die material forming, mold-die machining, and lens molding. These key technical factors, which affect the quality of the glass lens molding process, are systematically discussed and reviewed to solve the existing technical bottlenecks and problems, as well as to predict the potential applicability of glass lens molding in the future.

关键词： aspheric glass lens mold-die manufacturing,lens molding molding process simulation

DAQ readout prototype for JUNO

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Radiation Detection Technology and Methods 2021年第4期5卷 600-608页

作者： Tong Zhou Xiaolu Ji kejun zhu Fei Li State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsCASBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Purpose The Jiangmen Underground Neutrino Observatory(JUNO)is a multi-purpose underground neutrino *** 1800020-inch photomultipliers(PMTs)are instrumented in the Central Detector to detect the photons,and the signals will be captured by high-speed high-resolution waveform full sampling *** addition,about 250003-inch PMTs are also instrumented to capture T/Q Hits *** work builds a DAQ readout prototype system for JUNO,which can be used to test the full readout chain for 20-inch and 3-inch *** The system is designed to continuously readout the data flow from multiple electronics channels,check the raw data,and finally save them into ***,the graphical user interface(GUI)provides a real time display of the sampled *** system is developed with the open source Qt *** The design and performance of the system have been verified in detail,particularly by performance test based on Gigabit Ethernet and 10-Gigabit *** A DAQ readout prototype system has been developed for JUNO,which is successfully applied to electronics testing system in Italy and PMT testing system in Guangdong.

关键词： Data acquisition system DAQ readout prototype JUNO

Using a combinatorial auction-based approach for simulation of cooperative rescue operations in disaster relief

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International Journal of Modeling, Simulation, and Scientific Computing 2018年第4期9卷 230-250页

作者： kejun zhu Jian Tang Haixiang Guo Chengzhu Gong Jinling Li School of Economics and Management China University of Geosciences Wuhan 430074 P.R.China

In practice,we experience low efficiency of search and rescue(SAR)frequently in disaster ***,we will optimize the SAR through agent-based *** the kind of cases described here,rescue teams are characterized by different capabilities,and the tasks often require different capabilities to *** this end,a combinatorial auction-based task allocation scheme is used to develop a cooperative rescue plan for the heterogeneous rescue ***,we illustrate the proposed cooperative rescue plan in different scenarios with the case of landslide disaster *** simulation results indicate that the combinatorial auction-based cooperative rescue plan would increase victims’relative survival probability by 13.8–16.3%,increase the ratio of survivors getting rescued by 10.7–12.7%,and decrease the average elapsed time for one site getting rescued by 19.0–26.6%.The proposed rescue plan outperforms the rescue plan based on the F-Max-Sum a little *** robustness analysis shows that the proposed rescue plan is relatively reliable on condition that both the search radius and scope of cooperation are larger than ***,we have investigated how the number of rescue teams influences the rescue efficiency.

关键词： Search and rescue simulation task allocation heterogeneity combinatorial auction.

Control and monitoring software of LHAASO DAQ

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Radiation Detection Technology and Methods 2022年第2期6卷 227-233页

作者： Zezhong Yu kejun zhu Minhao Gu Fei Li MoHan Zhang State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China School of Nuclear Scicnce and Technology University of Chinese Academy of SciencesBeijing 100049China Tianfu Cosmic Ray Research Centre Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China

Purpose The Large High Altitude Air Shower Observatory(LHAASO)is a hybrid extensive air shower(EAS)*** consists of 3 types of detector arrays and about 9500 detector units in *** information generated by data acquisition system(DAQ),including signal count rates of detectors,is stored temporarily in Redis and updated *** is an open-source in-memory *** control interface of DAQ's data flow software is also based on *** to the monitoring and control requirements,status data from DAQ system need to be *** status of data flow software and detectors should be *** automatic operation mode,common software and hardware faults should be detected and recovered *** Status information collection,analysis and automatic operation control are implemented in multiple *** information collection programs collect the operation status data from the DAQ and monitor the operation status of the computing *** information is cached in *** is an open-source distributed event streaming *** DAQ data flow controller program obtains the status data from Kafka,analyzes the operation status,and tries to recover the fault by modifying the DAQ configuration file and restarting *** this architecture,the automatic control logic can be easily updated by modifying and restarting a single ***,the monitoring data are structured and stored in *** and Conclusions The software can monitor the detectors,electronics and computing nodes in LHAASO,save monitoring data in MongoDB,and control the DAQ data flow *** a fault occurs,it can restart the DAQ data flow *** software meets the auto-control operation requirements of LHAASO.

关键词： LHAASO DAQ Control Monitor

Percutaneous internal fixation with PKP and simple PKP for thoracolumbar burst fractures of the aged patients:A prospective randomized controlled trial

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Percutaneous internal fixation with PKP and simple PKP for t...

2013年浙江省医学会骨质疏松与骨矿盐疾病分会学术年会暨国家级骨质疏松症和骨质疏松性骨折诊治进展专题研讨会

作者： Dengwei He kejun zhu Xiaoyong Sheng Ye zhu WeiYang Yu Feijun Liu 丽水市中心医院温州医学院附属第五医院骨科

Background:The impact of percutaneous internal fixation as a supplement to percutaneous kyphoplasty(PKP) for the management of the thoracolumbar burst fractures of the aged patients is *** conducted a clinical controlled trial to define the effect of percutaneous internal fixation with PKP on thoracolumbar fractures and patientrelated functional outcomes. Method:This study included 43 patients with thoracolumbar burst fractures without nerve injuries who were elder than 65 years *** were randomly assigned to treatment with simple PKP(control group,n=22) and percutaneous short-segment pedicle screw internal fixation with PKP(treatment group,n=21).The patients were followed for at least two years postoperatively and were assessed with regard to clinical and radiological outcomes. Clinical outcomes were evaluated mainly with use of visual pain analog scale(VAS) and questionnaire score of Oswestry disability index(ODI).Radiological outcomes were assessed mainly on the basis of Cobb kyphosis angle and loss of kyphosis correction. Results:There was no significant difference between the two groups with regard to the preoperative indexes. The treatment group had better VAS values and had more postoperative improvements in ODI results as compared with the control group(P < 0.05).Postoperative kyphosis angle correction of the treatment group was superior to that of the control group,and postoperative correction loss was significant less compared with the control group(P < 0.05). In the control group,two patients postoperatively suffered refractures in the injured vertebra and one patient had refracture in the adjacent *** operation complications need managements were noted postoperatively in both groups. Conclusions:Compared with simple PKP operation,percutaneous internal fixation with PKP is one kind of more ideal surgical technique for the treatment of selected elderly thoracolumbar burst fractures.

关键词： the elderly patient thoracolumbar burst fracture percutaneous internal fixation simple PKP randomized controlled trial

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FDI与中国经济发展有序度研究

统计研究 2008年第12期25卷 36-41页

作者：王英朱珂君南京航空航天大学经济与管理学院

本文在经济系统是耗散结构的假设基础上,建立FDI和经济发展指标体系,运用灰关联熵模型定量分析了2001-2006年间FDI和中国经济系统有序度之间的关系。结果表明:在2001-2003年间,FDI造成了经济系统的熵增,降低了系统的有序度;而在2004-200... 详细信息

本文在经济系统是耗散结构的假设基础上,建立FDI和经济发展指标体系,运用灰关联熵模型定量分析了2001-2006年间FDI和中国经济系统有序度之间的关系。结果表明:在2001-2003年间,FDI造成了经济系统的熵增,降低了系统的有序度;而在2004-2006年间,FDI使经济系统产生了熵减,提高了系统的有序度。应当更加重视利用外资的"质量",使FDI成为系统引入的负熵,实现FDI与经济系统的协调发展。

关键词：外商直接投资经济发展灰关联熵

Cement distribution patterns are associated with recompression in cemented vertebrae after percutaneous vertebroplasty:a retrospective analysis

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Cement distribution patterns are associated with recompressi...

2016年浙江省骨科学学术年会

作者： Chao Lou Weiyang Yu Zhenzhong Chen kejun zhu Feijun Liu Dengwei He 丽水市中心医院

Purpose The purpose of this study was to develop the traditional classical two cement distribution patterns to four with the aim of revaluating the cement distribution patterns and further comprehensively investigate associations between cement distribution patterns and the occurrence rates of recompression in cemented vertebrae after percutaneous vertebroplasty(PVP).Methods A retrospective study of 224 patients(age range 66-89 years) treated with PVP for a single-level thoracolumbar osteoporotic compression fractures were conducted with a mean follow-up of 21.3 months(13-37 months) from June 2012 to July *** were divided into those without recompression(maintained group,n = 192) and those with recompression(recompressed group,n = 32).Another,patients were divided into four groups according to the cement distribution patterns evaluated on radiography and/or computed tomography:interlocked solid pattern group(group LS,n = 19) and uninterlocked solid pattern group(group ULS,n = 62),compact and solid cement filling pattern but interlocked or uninterlocked with surrounding cancellous bone in vertebrae;contiguous trabecular pattern group(group CT,n = 102) and discontiguous trabecular pattern group(group DCT,n = 41),sponge-like but contiguous or discontiguous cement internal filling *** filled type of responsible area was divided into sufficient filling pattern(SF,n = 184) and insufficient filling pattern(ISF,n= 40).Differences in treatment efficacy and the occurrence rates of recompression in cemented vertebrae were examined and compared for both groups using the Mann-Whitney U test and chi-square *** Recompression in cemented vertebrae was significantly more frequent in solid pattern group than in trabecular pattern group(P<0.05).Subgroups analysis showed that the vertebrae recompression rate in group ULS and group DCT was statistical higher than that in group LS and group CT(P<0.05) *** group DCT showed a higher frequency of reco

关键词： Cement distribution Vertebroplasty Osteoporotic vertebral compression fracture Recompression

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城市大气污染的风险认知研究评述与展望

北京大学学报（自然科学版） 2014年第5期50卷 969-978页

作者：朱可珺徐建华北京大学环境科学与工程学院环境管理系北京100871 清华大学公共管理学院应急管理研究基地北京100084

回顾近二十年来国内外公众对城市大气污染风险认知的相关研究,系统梳理了风险认知状况及影响因素。研究表明,媒体和官方发布的大气污染数据并非公众评判空气质量的主要依据,人们通过自身与污染源的远近、植被覆盖、感官感受、健康状况... 详细信息

回顾近二十年来国内外公众对城市大气污染风险认知的相关研究,系统梳理了风险认知状况及影响因素。研究表明,媒体和官方发布的大气污染数据并非公众评判空气质量的主要依据,人们通过自身与污染源的远近、植被覆盖、感官感受、健康状况及日常对话等对空气质量进行判断。公众对周围大气污染的感知与环境中污染物浓度的相关性并不一定高。女性、患有呼吸道疾病和教育程度高的人群更关注大气污染。社会经济因素也尤为重要,人们在判断大气污染时总是参考他们对当地社会经济水平的综合印象。此外,对研究风险认知的定性和定量方法做了对比和评述。最后提出今后我国学者可能拓展的研究方向,如探索公众对污染与健康影响之间因果关系的认知、媒体和信任的作用以及风险认知对行为改变的作用,以期为我国城市大气污染风险认知的研究提供参考。

关键词：风险认知城市大气污染人口统计学变量社会经济因素地点效应

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基于软分类和卡尔曼滤波方法的模糊规则提取

计算机工程 2005年第18期31卷 191-193页

作者：郭海湘诸克军黎金玲中国地质大学管理学院武汉430074

提出了一种新的基于遗传模糊软分类和卡尔曼滤波方法的模糊辨识算法。该算法由3个步骤组成:(1)基于遗传算法确定模糊C均值(FCM)中的最佳分类数,从而确定模糊规则的前件和样本在各类中的隶属度;(2)采用最小二乘法(LS)来确定模糊规则后件... 详细信息

提出了一种新的基于遗传模糊软分类和卡尔曼滤波方法的模糊辨识算法。该算法由3个步骤组成:(1)基于遗传算法确定模糊C均值(FCM)中的最佳分类数,从而确定模糊规则的前件和样本在各类中的隶属度;(2)采用最小二乘法(LS)来确定模糊规则后件的初始参数;(3)用卡尔曼滤波方法调整后件参数。最后,运用该算法对我国全要素生产力进行了模糊规则的提取。

关键词：卡尔曼滤波法模糊模型模糊规则遗传算法