科创中国

着眼于知识共享全过程,从个体、团队和组织多个层面入手,基于PLS的结构方程模型构建包括知识提供者贡献知识行为影响因素和知识接受者利用知识行为影响因素的虚拟团队知识共享影响因素模型,并进行实证研究,以期为虚拟团队知识共享的管理提供指导和借鉴.

为解决隐性知识交流存在的认知及表述、耗时等问题,针对隐性知识交流的社会化属性,引入社会化推荐来探讨其在隐性知识交流中的应用价值.通过分析社会化推荐在隐性知识交流中的工作机理,继而设计不同社区利用社会化推荐进行隐性知识交流的算法.同时,构建面向社会化推荐的隐性知识交流模型.

Due to the insufficiency of utilizing knowledge to guide the complex optimal searching, existing genetic algorithms fail to effectively solve excavator boom structural optimization problem. To improve the optimization efficiency and quality, a new knowledge-based real-coded genetic algorithm is proposed. A dual evolution mechanism combining knowledge evolution with genetic algorithm is established to extract, handle and utilize the shallow and deep implicit constraint knowledge to guide the optimal searching of genetic algorithm circularly. Based on this dual evolution mechanism, knowledge evolution and population evolution can be connected by knowledge influence operators to improve the configurability of knowledge and genetic operators. Then, the new knowledge-based selection operator, crossover operator and mutation operator are proposed to integrate the optimal process knowledge and domain culture to guide the excavator boom structural optimization. Eight kinds of testing algorithms, which include different genetic operators, are taken as examples to solve the structural optimization of a medium-sized excavator boom. By comparing the results of optimization, it is shown that the algorithm including all the new knowledge-based genetic operators can more remarkably improve the evolutionary rate and searching ability than other testing algorithms, which demonstrates the effectiveness of knowledge for guiding optimal searching. The proposed knowledge-based genetic algorithm by combining multi-level knowledge evolution with numerical optimization provides a new effective method for solving the complex engineering optimization problem.

明确电子商务信息生态群的定义,认为电子商务系统由领导信息生态群、核心信息生态群和支持信息生态群构成,分析每个信息生态群的知识流程.电子商务知识管理对象是编码知识和个人知识,各知识流程中的核心环节是信息分析或经验提炼,分别对应于编码知识和个人知识.在知识流程分析基础上,提出信息生态视角下电子商务知识管理的技术框架.

Innovation is a process of taking an original idea and converting it into a business value, in which the engineers face some inventive problems which can be solved hardly by experience. TRIZ, as a new theory for companies in China, provides both conceptual and procedural knowledge for finding and solving inventive problems. Because the government plays a leading role in the diffusion of TRIZ, too many companies from different industries are waiting to be trained, but the quantity of the trainers mastering TRIZ is incompatible with that requirement. In this context, to improve the training effect, an interactive training model of TRIZ for the mechanical engineers in China is developed and the implementation in the form of training classes is carried out. The training process is divided into 6 phases as follows: selecting engineers, training stage-1, finding problems, training stage-2, finding solutions and summing up. The government, TRIZ institutions and companies to join the programs interact during the process. The government initiates and monitors a project in form of a training class of TRIZ and selects companies to join the programs. Each selected companies choose a few engineers to join the class and supervises the training result. The TRIZ institutions design the training courses and carry out training curriculum. With the beginning of the class, an effective communication channel is established by means of interview, discussion face to face, E-mail, QQ and so on. After two years training practices, the results show that innovative abilities of the engineers to join and pass the final examinations increased distinctly, and most of companies joined the training class have taken congnizance of the power of TRIZ for product innovation. This research proposes an interactive training model of TRIZ for mechanical engineers in China to expedite the knowledge diffusion of TRIZ.

目的 调查沧州市社区护士脑卒中知识水平现状.方法 采用自行设计问卷,对沧州市43所社区卫生服务机构的137名社区护士进行调查.结果 社区护士脑卒中知识总分为(20.42±2.16)分,正确率为40.84%,不同年龄、学历、职称及专业年限、社区服务机构级别社区护士知识得分无差异(P>0.05);83.94%护士的脑卒中知识来源于阅读专业书籍.结论 社区护士脑卒中知识水平有待进一步提高,应采取多种形式开展脑卒中知识的培训,提高社区卒中护理工作的水平.

Because the deployable structures are complex multi-loop structures and methods of derivation which lead to simpler kinematic and dynamic equations of motion are the subject of research effort, the kinematics and dynamics of deployable structures with scissor-like-elements are presented based on screw theory and the principle of virtual work respectively. According to the geometric characteristic of the deployable structure examined, the basic structural unit is the common scissor-like-element(SLE). First, a spatial deployable structure, comprised of three SLEs, is defined, and the constraint topology graph is obtained. The equations of motion are then derived based on screw theory and the geometric nature of scissor elements. Second, to develop the dynamics of the whole deployable structure, the local coordinates of the SLEs and the Jacobian matrices of the center of mass of the deployable structure are derived. Then, the equivalent forces are assembled and added in the equations of motion based on the principle of virtual work. Finally, dynamic behavior and unfolded process of the deployable structure are simulated. Its figures of velocity, acceleration and input torque are obtained based on the simulate results. Screw theory not only provides an efficient solution formulation and theory guidance for complex multi-closed loop deployable structures, but also extends the method to solve dynamics of deployable structures. As an efficient mathematical tool, the simper equations of motion are derived based on screw theory.

本文将分税制改革、土地财政和房价水平置于同一框架来研究推动中国城镇房价持续快速上涨的制度性因素.经验事实表明,较高的房价水平总是与较大的土地财政规模相联系,而土地财政的形成与1994年的分税制改革密切相关.在对上述经验事实进行背景分析的基础上,本文运用2000--2008年的省级面板数据进行实证分析,结果表明,在控制了经济基本面、城市化率和地区竞争等潜在影响房价的因素后,分税制背景下逐年扩大的财政分权度是引发地方政府追求土地财政的制度性因素;地方政府的土地财政规模对中国城镇房价水平的高涨具有显著的正向影响,并且这种正向效应会随着财政分权度的扩大而被强化.本文的估计结果对财政分权变量的选取、估计方法的选择和估计函数形式的设定均是非常稳健的.

根据陕西省17个村庄的农地流转情况的调查资料,采取随机抽样法和问卷调查法,利用Logistic模型对陕西农村农地流转的影响因素进行分析,结果显示农户的个体因素是影响农地流转的主要因素,而一般认为的工资性收入和政策因素对其影响并不显著,由此应调整促进农地流转的长短期政策.文中的"农地流转"是指土地承包经营权的流转,不涉及农村建设用地的流转.

阐述了知识经济的概念与知识经济时代的特征,指出知识经济时代物流人才的能力结构要求,最后提出了知识经济时代物流企业人力资源管理的新理念.