递归方差倒数组合预测方法及其应用研究

本文针对简单平均组合预测方法（ＥＷ法）的局限性，在递归等权组合预测方法（ＲＥＷ法）［１］的思路基础上，进一步提出了递归方差倒数组合预测方法（ＲｅｃｕｒｓｉｖｅｖａｒｉａｎｃｅＲｅｃｉｐｒａｓｌＷｅｉｇｈｔｉｎｇ），即ＲＶＲＷ法，给出了有关的迭代计算公式，实例表明ＲＶＲＷ法在预测精度和收敛速度等方面较ＲＥＷ法具有更大的优越性。同时，该方法完全适用于组合证券投资风险最小化问题。     

专利组合分析:一个有效的企业竞争战略决策工具

就专利组合分析的背帚、概念和目标进行简要地介绍,并对专利组合分析的专利指标、专利组合、专利与市场一体化组合分析的方法以及一体化组合在化工行业的实证研究进行了分析和阐述。由此证明,专利信息是企业战略知识管理系统的一个核心要素,专利组合分析是一个将技术与市场战略紧密结合进行战略决策的非常有价值的工具。     

IT项目组合管理研究综述

IT项目组合管理是项目管理和决策支持系统中研究的热点问题.对IT项目组合管理理论的形成进行分析,并从项目组合收益、战略对应、风险、成本以及关联性等方面的研究进展进行综述研究,最后总结IT项目组合管理的未来研究方向.     

线性规划在确定组合预测组合权数中的应用

1 引言在预测的实践中,我们可以利用多种预测模型进行预测。预测模型不同,预测的结果也不相同。为了综合系统地利用各模型的信息,我们采用组合预测模型。组合预测的关键是确定加权系数。本文将以两个合理的度量为目标函数,通过解线性规划问题确定最优的权组合系数。 2 权系数的确定设对于同一预测     

变权重组合预测模型的研究

变权重组合预测模型的研究周传世，刘永清（广东商学院）（华南理工大学）１引言组合预测的研究是现在预测方法领域中研究得最为活跃的一个领域之一，但在变权重组合预测方面的研究还没有多大的进展。变权重组合预测模型的建立与应用是提高预测模型的拟合精度和预测精度、...     

变权组合预测模型研究

文献[1]就变权组合预测模型进行了有益的探讨,本文继续研究这一问题,给出完整的计算方法和应用实例。     

营销组合的再组合研究

本文对4P、4C、4R、4S营销组合的分析,结合创新思维的观点,对四种营销组合的因素进行了重新组合,形成了多种组合方式,增加了企业营销方式,使企业营销活动更趋于灵活,有利于提高营销活动的针对性,增强营销效果。     

非线性规划在确定组合预测权系数中的应用

非线性规划在确定组合预测权系数中的应用王明涛（郑州工学院管理系４５０００２）１引言组合预测是目前预测科学研究的热门课题之一，。组合预测方法的关键是确定组合权系数，唐小我“组合预测计算方去研究”一文［１］，给出了求解最优仅系数的公式（后称唐法），但在实...     

How Electronic Publishers are Protecting Against Piracy: Doubts About Technical Systems of Protection

The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means.     

中德海洋学核心期刊论文国际合著的比较分析

本研究选取Web of Science数据库,收集中国和德国发表的海洋学论文,将论文分为国际合著组与非国际合著组,利用文献计量学的方法,借助EXCEL、SPSS和UCINET软件,比较两国各年的发文量、论文的篇均作者和篇均参考文献数、收录期刊的影响因子、论文的被引频次以及合著国家。研究结果显示,中国海洋学领域的国际合著起步晚于德国,但发展迅速,近年来中国海洋学国际合著的论文量已超过德国;同时中国海洋学国际合著论文的质量和学术影响力都弱于德国,并且中国海洋学论文合著国家的范围也小于德国海洋学的合著国家。     

Exploring Multiplexity: Social Network Structures in a Computer-Supported Distance Learning Class

A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction.     

New dimensions in vaccinology: A new insight

The development of vaccines to prevent infectious diseases has been one of the most important contributions of biomedical sciences. Increasing understanding in biochemistry, molecular biology, molecular genetics and related fields have provided an opportunity for the development of new generation vaccines that are based on rational design approaches. This is possible because of proper understanding of the microbial-genetics, biochemistry, host-pathogen interaction and recent developments in molecular immunology. Another important improvement made in the quality of vaccine production is the incorporation of immunomodulators or adjuvants with modified delivery vehicles viz liposomes, Iscoms and microspheres apart from alum being used as a gold standard. This article reviews the art of vaccination from Jenner period to present day context highlighting all the developments made at each stage of the vaccine development. Various criteria have been discussed regarding the selection of epitopes that expand B & T cells, its linkage with other accessory cells of the immune system, means to overcome MHC linked immune unresponsiveness, enhanced antigen processing and presentations that specially induce either helper or cytotoxic or mucosal immune responses were critically discussed.     

军队信息化的动因、任务及对策探讨

基于未来高技术战争需求的牵引、军用信息技术发展的推动和构建核心能力的内在要求,我军必须加快信息化建设。为此,本文运用战略管理中的价值链方法对军队的任务及军队信息化的任务进行了全面分析,并提出了加速我军信息化建设的对策。     

技术密集型行业对制造业竞争力影响程度研究--以浙江省为例

以信息化为代表的新的科技成就,把当代生产力提高到一个前所未有的高度,使得世界制造业的面貌发生了巨大地变化。本文结合浙江实际研究表明,浙江制造业的结构调整主要是通过技术密集型行业扩张、传统产业高新技术改造完成的。技术密集型行业对整个制造业的产业绩效具有较为明显的上拉作用,但近年来这种上拉作用有趋弱迹象。从产业关联效应看,技术密集型行业的影响力系数很大,对其他产业有极强地带动作用;感应度系数也有较为明显的上升,对国民经济和制造业的制约作用有所增强。从资源配置效应看,技术密集型行业对资源的配置效应在制造业的重点行业中较强,而且呈明显的增强趋势。     

Internetworking and the Politics of Science: NSFNET in Internet History

This article presents an account of the process of development of the NSFNET and its significance for the emergence of the Internet of the 1990s. The fact that the development of the interconnected system of computer networks occurred within the realm of academic research is not incidental. The dynamics of the world of scientific research were intimately related to the shaping of the network and to the way in which it spread to other sectors of society. The construction of computer networks crossed the boundaries between science and society in order to build the scientific realm by transforming the world in which it is embedded.     

Our Own Devices: Heterotopic Communication, Discourse, and Culture in the Information Society 1

The main premise of this article is that in information societies generally, and in virtual social contexts particularly, a distinctive style of interaction to facilitate the communication of difference, heterotopic communication , has emerged. It rests on two cultural foundations: an ideological belief in the positive, socially integrating power of communication, and a prevailing ethic of instrumental rationality, subjective individualism, and strategically practiced self-interest. The former is demonstrated by the use of simulation and spectacle as sources of information; exhibitionism/voyeurism as a communicative style; and the awareness of surveillance. The latter is seen in the competitive use of knowledge as a commodity; a surface globalism masking deep parochialism; lateral as well as vertical information inequity; and the use of public versus private as strategies for engagement rather than as spaces. Those who engage in heterotopic communication resort to their 'own devices' both in the sense of personal agendas, strategies, interests, and interpretations, and in the form of the telecommunication tools that help realize them. These personal and technological devices allow individuals with the right educational and technical resources to avoid exposure to disagreement, difference, or other information that does not serve their direct purposes or reflect their particular views of the world; yet they also help convey the appearance of openness, availability, and cooperation. This style of interaction is used strategically in combination with information and communication technologies to gain social or economic advantages, but it may encourage social separatism and parochialism, inhibit the negotiation of disputes, and emphasize competing interests.     

以三元观点看化学的研究对象

化学和元极学都研究物质及物质的变化规律，有很多相通相合的地方。用元极学的三元观战来看待化学，以此建立化学相应的观点来拓展化学研究的对象。提出化学要突破“有”的实体的研究范围，扩展到无比广阔的“无”的研究领域。