互联网环境下国外健康信息替代搜索研究的回顾与展望

[目的/意义]健康信息搜索对改善人们的健康水平具有重要作用。近年来由非医学专业人士辅助他人搜索健康信息的现象受到了学者的关注,对这一现象的研究将有助于弥合数字不平等对人们健康信息获取造成的差异。[方法/过程]以国外已有的相关研究成果为基础,梳理健康信息替代搜索的概念内涵和理论基础,并从现有文献的研究方法、影响因素和行为特征三个方面对健康信息替代搜索的知识体系进行分析,最后从理论研究和实践探索两个维度进行前沿展望。[结果/结论]研究发现,国外现有的健康信息替代搜索大多局限于现象层面的分析,对主体参与动机、信息交换过程和效果机制的研究都不够深入,我国图书情报领域的学者在这一研究方向上有进一步探索的空间。     

对跨国公司子公司治理结构的思考：基于委托-代理理论

在跨国公司中,母公司与子公司关系可以看作是一种委托代理结构,母公司将决策制定权利和义务委托给海外子公司。本文主要介绍了目前国内外关于跨国公司治理的相关文献综述、分析了委托代理理论视角下的跨国公司,在此基础上提出了跨国公司子公司治理的对策建议。     

替代对偶算法求解多约束非线性背包问题

Multi-dimensional nonlinear knapsack problems are often encountered in resource allocation, industrial planning and computer networks. In this paper, a surrogate dual method was proposed for solving this class of problems. Multiply constrained problem was relaxed to a singly constrained problem by using the surrogate technique. To compute tighter bounds of the primal problem, the cutting plane method was used to solve the surrogate dual problem, where the surrogate relaxation problem was solved by the 0-1 linearization method. The domain cut technique was employed to eliminate the duality gap and thus to guarantee the convergence of tile algorithm. Numerical results were reported for large-scale multi-dimensional nonlinear knapsack problems.     

人事代理信息系统的设计与实现

本文以洛阳市人才交流中心为例说明人事代理信息系统的设计与实现 .系统采用C S模式 ,利用面向对象的方法进行系统设计 ,用PowerBuilder8.0作为开发工具 ,实现了不同用户不同权限的管理组合 .     

用ISA Server轻松打造校园网代理服务器

介绍用ISA Server打造校园网代理服务器的方法。     

基于代孕技术的伦理与法律思考

我国可以有条件地开放代孕。从伦理观看代孕有其合理性,既不会破坏家庭关系又不会导致子宫工具化、婴儿商业化;从法律层面看,代孕合同是有法律效力的,代孕是无生养能力夫妻实现其生育权和代孕母亲行使其身体权的一种有效方式。因此我国应建立开放的伦理框架,推动社会进步;加快相关立法,加强监督管理,开放并规范代孕行为。     

简论范梅南“替代父母关系”思想

"替代父母关系"是当代现象学派代表人物范梅南提出的新型教育概念,也是其在新的历史条件下对教学关系的进一步理解。"替代父母关系"的提出有其特殊的背景,而教师成为"替代父母"也必须具备一定的条件。"替代父母关系"思想对我国教育发展有着深远的意义。     

Motor variability in sports: A non-linear analysis of race walking

Abstract

This aim of this study was to analyse the nature of movement variability and to assess whether entropy measures may represent a valuable synthetic index of neuromuscular organization. The regularity of kinematic/kinetic time series during race walking, the changes in the structure of intra-individual variability over the test session, and the influence of athletic skill in (inter)national rank athletes were investigated. Motion analysis techniques were used. Sample entropy (SampEn) was adopted to examine fluctuations in lower limb angles and ground reaction forces. The regularity of both original and surrogate time series was assessed and compared, by estimating SampEn, to verify the presence of non-linear features in movement variability. SampEn was statistically lower in the original data than in surrogates. In contrast, the regularity of time series did not change significantly throughout the subsequent intra-individual repetitions. Hip and ankle joint angles and vertical ground reaction force manifested increased entropy for skilled athletes. Results suggest that race walking variability was not only the product of random noise but also contained information about the inherent propriety of the neuro-musculo-skeletal system. Furthermore, they provide some indications about neuromuscular control of the lower limb joints during race walking gait, and about the differences between more and less skilled individuals.     

局域网共享Internet方案的探讨

文章从IP地址分配的角度，分析了局域网接入Internet时存在的地址问题，提出了解决该问题的基本思路，并介绍了解决与之相关的代理技术等问题．     

《呼啸山庄》中纳莉的多重身份

《呼啸山庄》的艺术魅力之一是小说中那丰富多彩的人物形象。一个半世纪以来,读者关注最多,评论也最多的莫过于两个主人公凯瑟琳和希斯克厉夫。但书中的小人物纳莉也是不容忽视的,因为作者艾米莉赋予了她女管家、代理母亲、叙事者等多重身份,使得她成为了这部小说一股不可小看的力量之源。