对知识型企业人力资本界定的重新思考

在知识型企业,人力资本是企业价值的主要贡献因素。但现有文献关于人力资本的界定缺乏系统性和合理性,导致人力资本理论的延伸产生泛化和模糊的倾向,使与人力资本相关的一些理论拓展产生了障碍。目前人力资本与智力资本的内涵及其关系是学术界争论的焦点,由于两者概念含混、层次模糊,中外学者对于究竟是人力资本包含智力资本还是智力资本包含人力资本缺乏一致意见,致使人力资本理论研究缺乏共同语言。以资本的产权归属作为逻辑主线,分析得出人力资本应界定为大概念,即广义的人力资本包含智力资本与其他衍生资本,从而为人力资本理论的拓展研究铺平道路。     

绵羊角蛋白关联蛋白KAP6-1基因5′端调控区的分子克隆及测序结果比较

根据绵羊毛囊角蛋白关联蛋白(KAP 6-1)基因已知DNA序列设计合成了两个特异性引物,以绵羊基因组DNA为模板,PCR扩增出1 042 bp的特异性片段,连接到pM D 19T载体中获得该片段克隆.经过快速提质粒法筛选、限制性内切酶分析表明该克隆包含所需的目的片段.DNA测序结果也证明该克隆片段与原基因5′端调控区序列相比具有很高的一致性.研究结果为今后制备转基因克隆动物,在毛囊细胞中特异性表达绒毛生长调控基因奠定了基础.     

A continuous model of human dynamics

Ideas and tools from statistical physics have recently been applied to the investigation of human dynamics. The timing of human activities, in particular, has been studied both experimentally and analytically. Empirical data show that, in many different situations, the time interval separating two consecutive tasks executed by an individual follows a heavy-tailed probability distribution rather than Poisson statistics. To account for this data, human behaviour has been viewed as a decision-based queuing system where individuals select and execute tasks belonging to a finite list of items as an increasing function of a task priority parameter. It is then possible to obtain analytically the empirical result P(τ)∼1/τ, where P(τ) is the waiting time probability distribution.Here a continuous model of human dynamics is introduced using instead an infinite queuing list. In contrast with the results obtained by other models in the finite case we find a waiting time distribution explicitly depending on the priority distribution density function ρ. The power-law scaling P(τ)∼1/τ is then recovered when ρ is exponentially distributed.     

捕获与区域保护对捕食与被捕食系统的影响

建立并分析了含人工捕获与区域保护的捕食与被捕食模型,得到了平衡解之间的关系,给出了正平衡解存在并全局渐近稳定的条件.     

等厚干涉法测量应用实验研究

利用等厚干涉测量头发丝的直径,可以训练学生的实验操作技巧,加深对实验原理的掌握,丰富了实验内容,避免了实验结果的千篇一律,同时激发了学生的实验兴趣.     

中部地区经济发展与人力资源开发关系研究

中部六省是我国重要的工业、农业和能源基地,但近年来"中部塌陷"给宏观经济运行带来隐患。本文结合"中部崛起"战略构想,从区域经济的角度出发,运用新增长模型,分析中部地区经济发展与人力资源的相互关系,并给出中部崛起战略下人力资源开发的对策。     

Intestinal Transport and Biotransformation of Resibufogenin and Cinobufagin in Chan Su via HPLC/APCI-MS~n

In vitro models of human colon carcinoma cell line(Caco-2 cell monolayer) and human intestinal bacteria were used to investigate the intestinal transport and biotransformation of resibufogenin and cinobufagin in Chan Su by HPLC/APCI-MSn. The experimental results of Caco-2 cell monolayer demonstrate that the apparent permeability coefficients(Papp) of resibufogenin and cinobufagin are higher than 10-6 cm/s, which indicates that both resibufogenin and cinobufagin have a good absorption in the small intestine....     

基于e-HR理论人力资源系统的开发研究

文章通过国内人力资源管理软件功能的分析，总结普遍存在的问题，结合目前最新的人力资源管理行业模型e-HR的理论，对某大型国有企业的人力资源系统进行设计和开发，旨在为此集团的人力资源管理找寻起一个标准化，规范化，网络化的工作平台，提供全方位的人力资源管理、分析、决策支持服务，实现全面的人力资源管理。     

市井文学中的城市情怀

市井文学在对世俗精神尊重与怀旧的再现中，传达出中国城市传统的世俗魅力，包含着丰富的人性内涵。一方面，近一个世纪来中国城市的变迁在这些作品中有所反映，另一方面，城市也由此在当代文学中恢复其无限的生机与活力。     

Rheological properties of fresh and cryopreserved human arteries tested in vitro

Cryopreservation is widely used to preserve blood vessels for a while but is controversially suspected to affect the mechanical behavior of these allografts. The aim of this study was to determine whether differences in the three-dimensional mechanical behavior exist or not between fresh and cryopreserved arteries. Using a previously developed experimental system, in vitro inflation tests were performed on twenty segments of human fresh and cryopreserved arteries, in static conditions. Opening angles were also measured from images of rings in zero-stress state. The initial reference state was chosen as the unloaded state and tests were performed on specimens stretched at natural “in vivo” length. Mechanical measures calculated are “natural” (Hencky) strains (finite deformations), “true” (Cauchy) stresses in radial, circumferential, and longitudinal directions as well as strain energy per unit volume. Tangent moduli are derived from radial and circumferential stress-strain characteristics using non-linear curve fitting. Values of incremental and pressure-strain elastic parameters, wall stiffness, and compliance per unit length are also calculated. Results are presented in terms of characteristics of stresses and strains in the three directions, axial force, tangent moduli vs strains or stresses, and energy per unit volume, for both types of artery, with reference to transmural pressure. Detailed numerical results are given at mean transmural pressure or in the physiological range. Significant differences are indicated by statistic Student T-tests. Results obtained show that significant differences exist between rheological properties of fresh and cryopreserved segments of human artery. Strains, stresses, axial force, strain energy, and wall stiffness values highlight those differences whereas elastic parameters, compliance, and opening angle do not. The usefulness of some parameters to compare the mechanical behavior existing between fresh and cryopreserved arteries is therefore underlined. Received: 3 January 2000 Revision received: 12 April 2000 Accepted: 8 May 2000