Dissipativity analysis and synthesis of a class of nonlinear systems with time-varying delays

In this paper, new results are established for the delay-independent and delay-dependent problems of dissipative analysis and state-feedback synthesis for a class of nonlinear systems with time-varying delays with polytopic uncertainties. This class consists of linear time-delay systems subject to nonlinear cone-bounded perturbations. Both delay-independent and delay-dependent dissipativity criteria are established as linear matrix inequality-based feasibility tests. The developed results in this paper for the nominal system encompass available results on H_∞ approach, passivity and positive realness for time-delay systems as special cases. All the sufficient stability conditions are cast. Robust dissipativity as well as dissipative state-feedback synthesis results are also derived. Numerical examples are provided to illustrate the theoretical developments.     

集群企业持续成长能力的评价体系及实证分析

在文献挖掘的基础上,设计了集群企业持续成长能力的评价指标体系.考虑指标之间的相互影响与制约关系,以及专家的主观评价存在非线性的特点,研究了网络分析法进行评价的可行性;最后,给出了具体算例,实证表明采用该算法获得的结果是令人满意的.     

滑动平均模型参数估计方法的仿真比较

滑动平均模型（MA模型）是最常用的平稳序列模型之一,文章在模型阶数已知的情况下,重点研究MA模型中未知参数的逆相关估计、新息估计和矩估计,进行仿真计算,并对计算结果进行比较分析。     

Stochastically asymptotic stability of delayed recurrent neural networks with both Markovian jump parameters and nonlinear disturbances

In this paper we study stochastic stability of delayed recurrent neural networks with both Markovian jump parameters and nonlinear disturbances. Based on the Lyapunov stability theory, the properties of a Brownian motion, the generalized Itô's formula and linear matrix inequalities technique, some new delay-dependent conditions are derived to guarantee the stochastically asymptotic stability of the trivial solution or zero solution. In particular, the activation functions in this paper depend on Markovian jump parameters and they are more general than those usual Lipschitz conditions. Also, time delays proposed in this paper comprise both constant delays and time-varying delays. Moreover, the derivative of time delays is allowed to take any value. Therefore, the results obtained in this paper are less conservatism and generalize those given in the previous literature. Finally, two numerical examples and their simulations are used to show the effectiveness of the obtained results.     

企业内部创新协同及其影响要素研究

 基于协同学理论,以问卷调查资料为基础,对企业内部创新协同机制及其影响要素进行了实证分析。结果显示,战略、文化、组织、制度、技术等5个因素对创新协同绩效有显著影响。研究结论为企业有效地开展创新工作提供了理论依据。     

动态称重技术问题的分析与研究

根据目前动态称重技术现状以及经济发展对动态称重的要求,通过深入分析车辆的动力荷载、称重系统的动力学模型以及新的计量方法的探讨,提出了一种基于称重系统参数估值的动态称重计量方法。仿真结果表明该方法可以充分利用称重系统的动态信息求得称重数据的稳态值。     

基于SOA和WCF的远程审判系统设计与实现

数字法庭远程审判系统可以解决传统法院审判模式存在的效率低、成本高、风险大等弊端.本文以杭州市中级人民法院远程审判系统为研究背景,论述了该系统的整体架构、关键技术和实现方法等,并给出了典型的运行实例.实际运行结果表明,该系统可大幅度提高审判效率,节约法院警力和交通成本,降低提押风险,并支持异地质证、脆弱证人保护等审判业务...     

Existence of periodic solution for discrete-time cellular neural networks with complex deviating arguments and impulses

A class of discrete-time cellular neural networks with complex deviating arguments and impulses are considered. Sufficient conditions for the existence of periodic solution are obtained by using contraction theorem and inequality techniques. The results of this paper are new. An example is employed to illustrate our results.     

Topology identification and adaptive synchronization of uncertain complex networks with non-derivative and derivative coupling

This paper proposes an approach to identify the topological structure and unknown parameters for uncertain general complex networks with non-derivative and derivative coupling. By designing effective adaptive controller, the unknown network topological structure and system parameters of uncertain general complex dynamical networks are identified simultaneously in the process of synchronization. Several useful criteria for synchronization are given. Finally, numerical simulations are presented to verify the effectiveness of the theoretical results obtained in this paper.     

Existence and exponential stability of almost periodic solution for neutral delay BAM neural networks with time-varying delays in leakage terms

This paper is concerned with a class of neutral delay BAM neural networks with time-varying delays in leakage terms. Some sufficient conditions are established to ensure the existence and exponential stability for such class of neural networks by employing the exponential dichotomy of linear differential equations, fixed point theorems and differential inequality techniques. An example is provided to show the effectiveness of the theoretical results. The results of this paper are completely new and complementary to the previously known results.     

双语教学效果与质量保障机制研究——以延边大学经济管理学院为例

该文从延边大学经济管理学院开展双语教学的实践入手,从利益相关者角度对双语教学效果进行评价。结果显示,教师素质、教学环节以及学习效果是影响双语教学满意度的重要因素。并在此基础上,提出有利于增强双语教学效果的内部及外部质量保障机制。     

数字有线电视前端调制器的设计与实现

前端调制器是HFC网络实现数据传输的关键设备。本文从DVB-C标准入手，给出了前端调制器组成框图．对数据接口、QAM调制、射频上变频器等主要组成模块进行了分析与讨论，给出了设计方案。最后，给出调制器的中频和射频输出信号的实测结果。     

技术创新责任:维度与测量

技术创新责任是创新驱动战略背景下的企业社会责任新形式,是企业实现可持续发展的必然选择。针对技术创新责任,已有研究尚处于概念讨论阶段,欠缺具有科学性的测量工具。本文基于扎根理论开发技术创新责任的维度,并运用探索性因子分析和验证性因子分析验证所开发的维度,通过组合信度和平均变异量AVE等方式评估量表的信度和效度。研究结果表明,技术创新责任包括“员工维度”、“合作伙伴维度”、“消费者维度”、“政府维度”、“非政府组织维度”和“社区维度”6个维度,量表具有良好的信度和效度。研究结果丰富了技术创新责任的理论研究,为技术创新责任的实证分析奠定了工具基础,同时为企业完善利益相关者网络、提升利益相关者能力提供了重要的实践参考。     

高新技术企业认定公告的市场反应研究

本文以2008年《高新技术企业认定管理办法》为背景,利用事件研究法和869家高新技术上市公司数据首次考察了我国特殊的高新技术企业认定公告的市场反应。实证结果显示,并没有足够证据说明投资者对上市公司的高新技术企业认定给予较高定价。进一步检验发现,在高新技术企业认定公告期间,相对于对照组,中小上市公司、国有上市公司和2008年后新认定为高新技术企业的上市公司的市场反应都更差。本文的研究结果表明我国投资者存在短视行为,股票T市场未能有效支持企业成为自主创新主体。     

计算机平面设计课程的教与学

计算机平面设计是一门实践性很强的课程,但在该课程的教学过程中存在一些问题和误区,影响了其教学效果。针对这些问题和误区,提出了几点改进措施。实践表明,采取这些措施后收到了良好的教学效果。     

空间通信网QoS性能测量与可视化

将QoS性能测量与层次化动态雷达图可视化方法相结合, 提出了一种空间通信网QoS性能仿真新方法,构建了仿真系统平台. 同时,在分析空间通信网QoS性能参数的基础上,提出了一种改进的双分组对路径带宽测量方法,并利用空间通信网仿真系统验证了该方法的可行性和有效性.     

博士毕业生对学术不端行为的态度及成因分析

本研究根据社会调查数据,集中分析了博士毕业生对学术不端行为的态度及其影响因素,结果发现有相当一部分博士生对学术不端行为持宽容态度。影响博士生态度的因素有:个人的学术能力和对学术的兴趣与其对学术不端行为的宽容程度有负相关,而有过科研经历的人却更可能宽容学术不端行为。如果博士生周围师友的学术不端行为越频繁,则其对学术不端行为的宽容态度越强,而上过学校组织的科研道德课程者更不可能宽容不端行为。在此基础上,研究提出了严厉惩治学术不端行为、完善学术筛选和人员流动机制、改革现行科研管理评价体制和设立科研道德专门课程等建议。     

Innovation in industry: a discussion of the state-of-art and the results of innovation research in german-speaking countries

The subject discussed in this paper is the state-of-the-art and the results of those research activities which concentrate on the process of the research, development and application of new technologies, a process which is influenced by and which depends on a variety of factors. The paper centers around research activities carried out in the Federal Republic of Germany in the 1970's. On the basis of as many as thirteen problem areas, research activities concerning three system levels are dealt with: manpower and resources directly connected with the innovation process, the organization to which these factors belong and finally the social and natural environment of this organization. In addition to the three levels, on the elements, structure and process variables of which the problem areas are based, the results of the innovation processes, which become apparent in the form of progress and other effects, are discussed. Analysis of the thirteen problem areas shows that the effects of the innovation processes, once they are accomplished, can be examined quite successfully, whereas research on the process itself as well as the influence exerted on this process by the organization and the social environment, have not yet brought about satisfactory empirical results. Although empirical results are available with regard to partial problems, research gaps are abundant in this field. As a consequence, innovation policy rests on a rather uncertain basis.     

金融中介、金融市场的发展与经济增长--基于中国的实证

本文利用中国的样本数据对Stiglitz等人关于金融中介和金融市场的发展对经济增长作用的分析进行了实证检验：Granger因果检验的结果表明，金融中介和金属市场都是经济增长的Granger原因；非嵌套假设检验（nonnested test)的结果则显示对我国而言，金融中介的发展对经济增长的影响比金融市场的发展对经济增长的影响更为重要。两个实证结果均证明了Stiglitz等的理论假设的正确性，据此我们得出了其相应的政策含义。     

鄱阳湖水系COD-Mn变化规律研究

本文对鄱阳湖及五大支流水质监测数据进行统计分析,以图表形式揭示了鄱阳湖及其五大支流CODMn时空变化的规律,总结出了鄱阳湖水系CODMn变化的主要两个特点：①CODMn呈季节性变化;②流经城市地段后,水体CODMn值将升高。通过对CODMn与水质参数的相关性分析,从地表径流、城市生活污水及工业点源、水土流失面源等方面的影响解释了上述特点。