为了快速准确地检测出短路故障,并使故障限流器快速投入运行,提出了一种基于三相电流平方和比值的短路故障快速检测方法.该方法利用前后时间窗内三相电流平方和均值之比作为故障检测量,在三相短路故障时不受故障初相角影响,不受谐波影响.基于PSCAD/EMTDC仿真平台,建立了500 kV输电线路模型,合理选取了该方法的整定值与闭锁值.考虑不同故障类型、不同故障初相角、不同过渡电阻、空载合闸、谐波及噪声等因素,验证了该方法的快速性及有效性.在各类故障工况及干扰工况下,比较了该方法与常用三种检测方法的性能差异.仿真结果表明,该方法性能良好,能够快速可靠地检测出短路故障.

日前,国家医疗保障局等9部门印发《关于国家组织药品集中采购和使用试点扩大区域范围的实施意见》,意味着试点工作进入新阶段.作为2018年12月6日“4+7”试点和2019年9月24日“4+7”扩围两批次药品集中采购信息公开大会的现场见证者,笔者拟谈该项工作对于深化医改和医药行业的影响,以及健康中国战略中的价值思考.

目的 建立武冈市农村地区心脑血管疾病(cardio-cerebrovascular disease,CVD)住院病例的预测模型,并对CVD住院病例的变化趋势进行预测分析,为医院合理配置CVD科室医疗资源提供参考依据.方法 利用Stata 14.0软件对武冈市2013年1月～2016年12月农村地区CVD住院人次月度数据构建季节性自回归移动平均混合模型(seasonal autoregressive integratedmoving average model,SARIMA),并对2017年武冈市农村地区CVD住院病例进行预测分析.结果 通过模型构建最终拟合的CVD住院病例预测模型为SARIMA(2,1,1)x(O,1,0)12.Ljung-BoxQ检验结果显示残差序列为白噪音序列(Q=11.12,P=0.680),说明所建模型拟合度较好,且2017年的预测结果与观测结果基本一致,总体相对误差在-1.2％左右.预测结果显示,夏季为每年CVD住院高峰期.结论 SARIMA模型可以对武冈市CVD住院病例进行较准确的短期预测,医院可以根据不同月份CVD就医需求合理配置院内CVD科室医疗资源.

In order to effectively support the product variant design and the mass customization design, the generalized modules in the product platform were divided into six parameterized models based on different attributes, mining inclusive relationship among these parameterized models. The inclusive relationship analysis mainly includes four steps: 1) Various types of codes were extracted from generalized modules as the code segments, and the serial number of components was used as the transaction to construct the transaction data table; 2) The transaction data table was converted to 0-1 matrix and the frequent item sets was obtained by the Apriori algorithm; 3) The confidence scores in the frequent k-item sets were compared to get the strong relationships; 4) The relationship among the parameterized models was obtained. Finally, the feasibility and effectiveness of the proposed method were verified by a case study of valve. The results show that the inclusive relationship analysis is conducive to rapidly reuse products and process resources, to facilitate the accurate and inaccurate product and process configuration, and to promote the effective implementation of enterprise mass customization strategy.

随着近年公立医院规模的不断扩大,其经济活动无论从金额还是种类上都呈上升趋势,对外签订的合同数量及复杂程度也随之加大,因此医院急需完善合同管理流程,并从合同签订前、订立、履行三个阶段加强审计,识别其风险,采取有效控制措施,以规避风险、维护医院合法权益.

从20世纪90年代中期开始管理信息系统逐步兴起,并展现其在信息管理中的优势,特别是随着科学技术的发展,迎接技术在过去二十余年里突飞猛进,信息管理软件的开发也层出不穷,进入21世纪的管理信息系统逐渐完善,展现了巨大的竞争力和不可替代性,特别是因特网的发展使得信息管理系统不断探索的外延发展.就管理信息系统发展的轨迹、自身的特点和存在的问题,就其发展方向和实现技术进行了论述,希望能为管理信息系统发展理论作贡献.

The government affairs system is an OLAP/OLTP(on-line analysis processing/on-line transaction processing)hybrid system,with characteristics of intensive I/O,heavy transaction load,a huge amount of data,and the need to long-term preservation of user service information.Aiming at the problem of bottleneck between network and I/O caused by traditional storage model,on the basis of Oracle Exadata,a vertically integrated storage system architecture with a number of intelligent access technology was put forward,which can improve access performance by 10 times to 100 times for high load hybrid government affairs applications system.

从上世纪20年代梁启超明确提出中国史学史的概念和学科创建主张直到今日,中国史学史的发展经历了近百年前赴后继的建设和发展,涌现出不少优秀的学者和杰出的著作,使得这一学科逐渐由幼稚走向成熟。谢贵安教授的《中国史学史》作为近代的一部史学史著作,也在前辈学人理论和实践的基础上,形成了自己的特色。

冯天瑜先生是湖北地区著名的文化史学家,他勤于治学,笔耕不辍,著作等身。冯先生在史学上的成功很大程度上归因于他不拘一格的治学方法。在治史实践中,冯先生善于以小见大,通过"历史文化语义学"来以"概念"解释历史。于史料,冯先生能以采铜于山之精神发掘原始史料和口述史料,在精密的考辨中凸显史学重实录的学格特征;于史学,又能以宏大之气魄融通义理、考据与辞章,赋予史学以新的气象。在冯先生的论著中,"学术性"与"思想性"得到了有机的统一。

目前研究生心理健康教育工作存在一些问题,做好高校研究生心理健康教育工作应遵循相关原则进行总结和分析,并采取相应的心理健康教育对策,改善研究生心理健康状况,从而不断地促进研究生心理的健康发展。

<正>近年来,随着国际国内形势发生深刻而复杂的变化,高等教育改革不断深化,研究生培养机制和管理模式发生了根本的变革。研究生培养教育规模不断扩大,培养目标由以前的单一科学研究型人才培养转为科学研究型与工程应用型并重的模式,导师责任制和导师项目资助制的逐步完善,产学研联合培养研究生的"双导师制"的试点推行。在此情况下,如何加强和改进研究生党建工作,积极探索研究生党建的新思路和新

Disturbance,high complexity and derivatives are main features which are different from normal emergencies of unconventional emergencies.In response to these characteristics,studying the evolution model of unconventional emergencies to control the complexity and development trend of event handling process has become a hot research problem.In this paper,the authors propose the NFA(Nondeterministic Finite Automation) evolution model and the corresponding evolutionary algorithms of unconventional emergencies,the evolution rules in the form of description,and the event handling scheme selection and resource scheduling functions.Examples show that the NFA model can describe not only the evolution of events,but also the relationships between handling process,scheme selection and resource scheduling.Compared with other existing models,its computability is the most important feature.

我国企业在政治参与过程中,由于贪婪、过度竞争与不正当竞争,以及制度漏洞等多方面的原因,出现了大量的"权钱交易"、"权色交易"等企业不当政治行为.我国企业不当政治行为主要有五种类型:直接贿赂型、吃喝玩乐型、变相贿赂型、隐瞒欺骗型和舆论导向型.这些企业不当政治行为出现的原因包括:受潜在巨大利益的驱使,企业逐利的天性,竞争模仿的压力,通过"正当渠道"维护自身利益的困难,以及现有法律制度的漏洞与不完善.而通过完善现有法律制度,加快制定"阳光法案",加大执法监督力度,提高企业不当政治行为成本,疏导企业的政治参与渠道,加大行政改革力度,减少政府对市场的干预,积极倡导企业自律,可以有效地防止企业不当政治行为的发生.

In practice area, with the globalization as well as the knowledge economy era's coming, enterprises are realizing the importance of knowledge management. More and more enterprises started implementing knowledge management. Knowledge Management includes a flexible and effective integration of specific content management, cooperation mechanisms and data analysis functionalities. In the paper an overview of knowledge management is given and the definition and concept is introduced. Then the detailed research on the process of knowledge innovation and some measures of knowledge innovation management are presented.

In order to provide the personal service for online system, a personalized recommendation system framework based on web mining is proposed. Individual recommendations in accordance with user’s custom and interest can improve the quality of service.

To determine the target users of a company, a new data mining model is proposed. The new method can serve as an efficient vehicle for firms not only to predict the products or services that should be provided or improved for their target user groups, but also to identify the right users for a specific product family or service.

Most of the current framework for Web services are based on keyword matching, Web services which contains semantics multiplicity still cannot realize service discovery and bind automatically. To solve the lack of efficient discovery mechanism for Web service, a semantic web technology based Web services discovery approach is presented. A semantic based index in the services registry to improve the lower matching efficiency of traditional services semantic matchmaking model is built. The multilayer flexible matchmaking mechanism according to the model is also proposed in the paper. The mechanism fully utilizes the semantic information to improve the accuracy of services matching.

Due to the loophole and imperfectness in present institutions,business political bribery occurs frequently in political field.Based on the institutional theory,this paper discusses the causes and governance of business political bribery.We consider that the loophole and imperfectness of present institutions,including forceful institution,social moral institution and culture-cognitive institution,is the main cause of business political bribery.As a result,some institutional construction proposals are put forward as the countermeasures against business political bribery.

Because hot problem intelligence spans a long period of time and contains much repeated intelligence,dated intelligence,huge amount of information that has no practical value,this paper put forward a new hot problem intelligence obtaining model and a ratings-filter algorithm to get rid of coarse and false information while keeping refined and true intelligence.Firstly unordered but related intelligence was arranged to be structural,and then SVM(space vector model) was applied to make a new feature selection method according to the specificity of hot problem intelligence.This method took into consideration repeated parameter and outdated parameter in calculating the similarities between feature vectors,thus intelligence could be optimized.The experiment results showed that the filtering algorithms could effectively remove repeated information and outdated information from the original intelligence library,and the remaining piece number of intelligence information was about 59% of the original number.

本文综括性地介绍了西方企业政治行为伦理问题的产生,主要的伦理理论,相关的伦理标准与伦理框架,以及对非道德企业政治行为的治理问题。对处于社会转型期的中国,企业政治行为的合法性与伦理问题更值得研究和关注,而西方学者的这些相关研究将给我们带来启发和借鉴。