A novel controller design and evaluation for networked control systems with time-variant delays

A new delayed state-variable model for networked control systems is presented, upon which a linear quadratic regulator (LQR) is designed. A method of delays-estimation online is also given. A fuzzy logic with LQR controller is addressed for the difficulty on implementation of LQR in networked control systems (NCSs) with time-variant delays. Simulation results prove that the novel controller can make the system stable and robustly preserve the performance in terms of time-variant delays.     

复杂产品系统开发网络组织及组织能力探索

复杂产品系统在产品结构、生产特性、市场特征等方面与传统的大规模制造产品存在较大的差异性,针对复杂产品系统特有的结构特征和其开发的网络组织结构,运用战略能力、职能能力、项目能力三个维度来阐述复杂产品系统开发网络组织的组织能力,指出学习是提升该能力的有效途径和方式,在此基础上说明复杂产品系统开发组织的学习与大规模制造产品学习间的区别。     

不确定性条件下企业信息系统的云化决策方法

企业在决策本地化信息系统转换为云模式的软件即服务时面临着技术市场发展、云化收益、决策者风险偏好等诸多不确定性。针对该决策,引入前景理论考虑了维持现状偏好、追求管理时尚等心理行为,依据交易成本理论和技术组织环境理论提取了决策指标,以未来不同的软件即服务市场成熟度作为前景状态,计算各备选信息系统云化迁移的综合前景值,形成不确定性条件下企业信息系统的云化决策方法。同时,应用该方法实例分析了一家企业,并与基于期望值的灰色随机多准则决策方法进行了比较,说明了该方法的可行性和合理性。     

基于多目标优化的协同谈判决策支持研究

针对电子商务的协同性和注重良好客户关系的特点，提出了一种新的谈判机制——协同谈判。在基于约束的问题空间描述方法基础上，本文提出了协同谈判多目标优化决策模型和相应的求解方法，该方法不受限于约束和变量类型，可随时增加或删除约束条件，具有功态性和容易实现等特点，并能找到多目标优化的非劣解前沿，从而达到提高谈判有效性的目的。     

Output feedback stabilization for symmetric control systems

This work is devoted to the study of symmetric control systems. It establishes a relation between internal symmetry and external one for a linear invariant control system having n real simple poles. The symmetric stabilization problem is studied using a symmetric feedback gain such that the output control stabilizes the closed-loop system. A necessary and sufficient condition is given to solve this stabilization problem for a symmetric control system (A,B,C) and a generalized symmetric control system (E,A,B,C).     

电力系统电压稳定性的研究

对国内外电压稳定问题研究的现状进行了概述。特别介绍了对电压失稳机理的认识以及当前广泛采用的几种电压稳定性的分析方法，而且还介绍了电压稳定研究进一步发展的方向。     

我国药品专利强制许可制度的法律规制研究

面对严峻的公共健康形势,药品专利强制许可制度在平衡专利私权与公众健康权之间实现着有效的动态平衡。通过梳理我国药品专利强制许可立法的演变过程,从政策定位、法理依据和社会需求三个层面对该制度存在的现实基础进行分析,指出我国药品专利强制许可制度之所以处于“零实施”的现状,既有政策负效应的障碍,也在制度模式和立法上存在缺陷。进一步明确制度的政策定位,通过立法完善制度设计,促进该制度在我国的实践落成和法律完善。     

Factors influencing electronic health record adoption by physicians: A multilevel analysis

In Canada, the healthcare system remains paper-laden, and EHR adoption by physicians lags behind many other industrial countries. Recent reviews identified individual and organizational factors as having the most important influence on EHR adoption and proposed taking a multidimensional perspective to study these adoption determinants. However, most studies have focused on physician EHR adoption measured at the individual level.ObjectivesFirst, we used a multilevel regression model to assess whether organizations' characteristics influenced physician behavioral intention to use EHR. Second, we sought to identify individual and organizational factors that explain physician intention.MethodsWe conducted a prospective cross-sectional study among physicians in 49 primary healthcare organizations in four regions of the province of Quebec (Canada). We first analyzed relationships between individual and organizational variables and intention. Second, we performed multilevel modeling to explore organizational characteristics' impact on physician intention to use EHR.Results278 completed questionnaires were returned from the 31 organizations that had at least 5 participants (response rate: 39.8%). Questionnaires showed satisfactory psychometric properties. The multilevel modeling found no significant overall influence of organizational level on physician intention to use EHR. Second, six of the individual level constructs had a positive and strongly significant impact on physician intention.ConclusionIn the Quebec context, organization-level seems to have no significant impact on EHR adoption by physicians. Hence, particular strategies are more likely to succeed if they target individual physicians rather than organizations.     

20世纪中国文学价值系统与传统文学价值观

20世纪中国文学,形成了以肩负历史和民族责任、追求文学参与历史过程因而突出文学对国民群体的精神重建的文学价值系统,与以追求个体的生命价值和个性自由因而追求文学超越意义的文学价值系统。这两大文学价值系统与传统文学观和文化精神有着深层的关联。文章较系统地论述了其在各个时期的具体特征,特别指出一些作家重蹈传统“自我中心主义”覆辙的价值取向。