虚拟水及其在缓解区域水资源短缺中的应用研究

虚拟水是指生产商品和服务所需要的水资源数量。虚拟水战略是指贫水国家或地区通过贸易的方式从富水国家或地区购买水密集型农产品(粮食)来获得本地区水和粮食的安全。本文在综述前人对虚拟水研究的基础上,计算了2002年甘肃省及不同地区主要农产品虚拟水含量,并对甘肃省加强虚拟水贸易的战略进行了探讨。     

基于虚拟仿真技术的注塑机设计

将计算机虚拟仿真技术应用于注塑机的设计,主要阐述虚拟仿真软件在注塑机新产品设计开发中的实际应用、实施手段及解决的实际问题。该设计方法能够给我国注塑机行业以及其它机械领域中的设计工作提供借鉴。     

基于盗版冲击下软件产品版本划分差别定价研究

本文从软件市场盗版猖獗原因分析入手,结合软件产品特点提出版本划分差别定价策略及其定价模型,在满足客观存在的大量市场需求的同时,降低市场盗版率。既实现了社会福利的优化,又为进一步抵制盗版提供了新的思路和方法,有助于软件业的健康成熟发展。     

高新技术产业项目的绩效管理——基于软件项目管理的实证研究

针对高新技术产业广泛采用项目驱动的管理模式,在理论分析和实地调查的基础上,实证研究了客户、项目经理和激励制度对项目业绩的影响。结果发现客户对定制化需求大,但对标准化软件却有更高的边际利润;政府机构是大客户,但其垄断地位,所带来的销售利润率和项目交付率并不高;地域商务环境影响交易成本,进而显著地影响了项目的业绩水平;项目业绩受项目经理激励程度和方式的影响,但与项目经理认知特征无显著关系。这些结论说明软件企业在制定战略时,需以定制产品和定制服务为起点,但最终必须研发成为具有行业特点的标准化应用软件;在资源分配时,应重点关注地域商务环境好的客户,适当提高非政府机构行业客户的资源分配比例;应健全项目经理激励制度,促使项目提前完工,从而降低开发成本,增加项目业绩。     

培养学生软件开发能力的软件方向课程群建设

培养计算机科学与技术专业学生软件开发能力,应构建以程序设计语言类、数据存储类、软件开发方法类和软件实践类课程为基础的“课程群”,并通过修订课程教学大纲、实验大纲,更新教学内容,改进课堂教学和毕业设计环节等途径加以落实。     

虚拟企业的信任关系治理机制——基于演化博弈论的研究

伴随着网络经济的发展,虚拟企业应运而生,作为一种组织间协调机制,虚拟企业的治理问题引起了学界的关注,而信任作为虚拟企业的基石可以成为一个良好的切入点.本文首先在虚拟企业概念界定的基础上,提出机会主义行为和治理结构缺失是虚拟企业治理的主要困境,并以企业网络理论作为分析视角探讨了虚拟企业中嵌入性的信任存在,阐明了虚拟企业信任关系的演进路径.然后采用演化博弈理论中经典的囚徒困境博弈模型对虚拟企业中的外部约束机制对虚拟企业成员之间的积极合作与信任的影响进行了矩阵分析.论文最后在上述分析研究的基础上,提出了虚拟企业治理应采用内外治理相结合的信任治理体系,希望能对我国的虚拟企业治理提供良好的建议.     

虚拟品牌社群娱乐价值对品牌忠诚的作用机制研究

笔者采用实验方法,首次就虚拟品牌社群娱乐价值对消费者品牌忠诚的作用机制进行探究,并将品牌社群承诺细分为情感性承诺和算计性承诺两种类型。结果发现:情感性品牌社群承诺在其中起到完全中介的作用。因此企业在实践中应加强虚拟品牌社群的娱乐版块建设,并通过多种方式来强化消费者的情感性品牌社群承诺以促进其品牌忠诚。     

Areal differentiation of virtual water for agricultural products and its effect on regional agricultural structure adjustment in China： 1995-2007

With a vast territory, the space-time distribution of water resources is uneven in China. There is a great dif ference in natural conditions and farmland management of agricuttural production in different regions. The areal differentiation of agricultural products virtual water is obvious. Comparison with the agricultural products virtual water from 1995 to 2007 in China shows an increase in the first ten vears and a little decrease in recent years. There has been a tendency of increase all the time in Northeast and Northwest. but a decrease after an increase firstly in other regions. The virtual water offood crops is the maximum which accounts for more than 70% in China. and that of vegetables is in a fast growth. The proportion of agricultural products virtual water to the total water resources in each region has a large difference, showing the imbalance of agricultural water in different regions, which accounts for 50%-90% in Northeast, and 125%-185% in North China. Under the guidance of virtual water strategy, based on the differences of resource endowment, each region should adjust agricultural structure, decide production by water, and select water suitable crops. In water-rich region, agricultural produets of high water consumption should be planted appropriately, which will make full use of the abundant local water resources. In water-shortage region the crop production of high water consumption and low efficiency should be depressed, and that of low water consumption and high efficiency should be supported and increased. It will achieve reasonable disposition of water resources, promote ecological restoration and environmental protection, as welt as ensure food security.     

A study of virtual land trade between China and ASEAN based on material flow analysis model

In this paper,based on the material flux analysis model（MFA） and its corresponding theories and algorithms of ＂virtual land＂ virtual land contents of five primary agricultural products are calculated and＂Virtual land trade＂hidden in those imported and exported products are also obtained through analyzing the primary agricultural product trade between China and ASEAN. In the process of calculationl following the thought of Changing agricultural products to ＂Virtual land trade＂land content, trade condition and spatiai distribution of agricultural products Were integratedly considered. indicate that China exported 73;057 km^2 of virtual land area to ASEAN by tea, vegetables; maize and grain, ASEAN exported： 57.332 km^2 to China by natural rubber from 2002 to 2005. It obvious; that china has lost 15,725 km^2 arable land through agricultural product trade, Additionally, in order to process： of calculation Virtual land trade, Thailand taker as an example to analyze its international trade of rice and Wheat from 1991 to 2005 and Calculate their ＂Virtual land trade＂ 2001 through 2005. According to and calculation, it is not difficult to conclude that ＂Virtual land trade＂ very important and could be used for China to guide agricultural export or import Structure and maintain Sustainable use of land resources.