企业知识管理水平的测评

从管理者对知识管理的重视程度，知识管理基础设施的建设水平，人力资源管理知识化水平，组织结构和企业文化的适宜度，知识的检测、评估和利用水平，外部关系整合的知识化水平等六个方面建立了企业知识管理水平的测度指标体系，并进行了综合评价。     

科学组织:在科学自主与社会型塑之间

通过对科学组织内部运行态和外部运行态的分析,形成一个科学自主性和社会型塑性相互作用的关于科学组织运行的“双重相互作用圈”模型,从科学与社会关系的角度,探讨了科学组织的多元模式,分析了科研管理的有效性。     

Fault diagnosis for analog circuits based on chaotic signal excitation

A fault diagnosis method for analog circuit is proposed in this paper. An all-purpose amplifier is taken as the typical circuit under test (CUT). The chaotic signal, which is generated by an improved Chua's circuit, is employed as the excitation signal of CUT. The algorithm for phase-space reconstruction of chaotic time series is a combination algorithm of multiple autocorrelation and Γ-test. The circuit state is estimated based on detecting the geometric change of Chua's attractor with a data-mining approach. For the purpose of information fusion, another eight features are extracted from the testing data to comprehensively determine the CUT states. A discussion is made for comparing the effectiveness of each feature according to the testing results.     

怎样使产品更完善

任何事物都存在或者迟早都会出现这样或那样的不尽人意之处。很多产品刚问世时 ,因受特定时空环境的限制 ,并非完美无瑕 ,这也给发明者对这些产品进行改进和充实提供了创新机会 ,使事物能在不断的创新中得到完善。如原始的伞 ,也能遮阳遮雨 ,但只是一块布 ,或是一片树叶、一片荷叶 ,使用携带都不方便。后来 ,人们将布固定在有把手的支架上 ,制成了有支架的伞 ;再后来 ,又有人将支架改变成可折叠式 ,制成了两折叠或三折叠式的伞。一次次的创新 ,使伞的功用逐步得到了改进和提高。现在的伞 ,不仅能遮阳挡雨 ,使用和携带方便 ,而且还具有美化和…     

1935年国民政府实施废除银本位货币改革的原因分析

1935年中国经济由于国内白银大量外流遭受沉重打击,并导致国内货币信用发生严重危机。国民政府之所以发生如此严重的货币危机,不仅是受世界经济危机爆发后国际银价骤升影响,更是中国银本位货币机制存在弊端,以及国民政府实施巨额的财政赤字政策所致。为拯救困境中的货币金融体系,国民政府于1935年实施废除银本位的货币改革。此次改革使中国货币摆脱了国际银价的影响,并结束了当时中国货币流通的混乱局面,在中国货币金融史上具有重大意义。但此次货币改革对硬通货白银的彻底放弃,又为中国经济后来发生恶性通货膨胀埋下了严重隐患。     

Bivariate grid-connection speed control of hydraulic wind turbines

The requirement for An electrical grid-connected wind turbine is that the synchronous generator speed is stable within a required speed range for the electrical grid. In this paper, a hydraulic wind turbine (HWT) system is considered, and the working principle and working conditions of the HWT are introduced. A novel speed control method is proposed in this paper, using both a proportional flow control valve and a variable displacement motor, which are adjusted in combination to control the speed of the HWT. By establishing a state space model of the HWT and solving the nonlinear system with a feedback linearization method, a bivariate tracking controller is constructed to realize accurate speed control under fluctuating wind speed and the load disturbance conditions. The effectiveness of the control method is verified by simulation, but experimental results highlight problems with the method. The theoretical controller is simplified to reduce sensitivity to measurement noise and modeling error. The control effect has been improved to some extent, but it is limited. Based on these results, combined with the sliding mode variable structure control method and the feedback linearization method to solve the problem of measurement noise and modeling error, and the effectiveness of the control law is finally verified experimentally. It lays a theoretical foundation for the practical application of HWT.     

抓住机遇推进高黎贡山国家生物多样性保护基地建设

生物多样性不仅是云南的优势,也是最有潜力的新经济增长点。作为滇西北生物多样性的重要组成部分,高黎贡山在我国乃至国际地理学与生物多样性保护中,占有极其重要的地位。积极推进生物多样性保护基地建设对于云南省生物资源、旅游资源开发利用,实施可持续发展战略,推进我国乃至世界生物多样性的保护,具有重要意义。     

读者参与的高校图书馆学科服务新模式探讨

该文通过分析高校图书馆读者参与的学科服务模式,结合北大图书馆近期的相关实践,提出读者是高校图书馆最宝贵的资源之一,无论是教师读者还是学生读者都有着可被挖掘的巨大潜力。建议高校图书馆突破现有的学科服务模式,主动与读者进行多层次的创新合作,通过整合读者群体中的各种资源提高学科服务水平。     

重庆第三产业R&D投入产出效应的实证研究

本文构建了二级三要素CES生产函数,把要素投入分为R&D投入与非R&D投入两个部分,计算了重庆第三产业五个主要行业的R&D投入与非R&D投入的替代弹性和产出弹性。研究发现这些行业目前都处于规模报酬递增阶段,人力投入与资本投入之间的替代弹性平均约为1,R&D资本投入替代弹性比R&D人力投入替代弹性小,非R&D投入的产出弹性高于R&D投入的产出弹性。最后根据研究结论提出了对策建议。     

山寨产业生产方式及其易发领域探析

从生产方式的视角,以山寨手机等常见的消费类通讯或电子产业为主要研究对象,对其进行剖析,进而探讨山寨产业可能的易发领域.