Review on the measurement theories of enterprise knowledge management during the past three years in China

The implement of enterprise knowledge management gives rise to extensive research on its measurement. Based on the existing measurement theories and evaluation index systems of enterprise knowledge management during the past three years in China, this paper analyzes the problems in measuring target and designing the evaluation index system in the existing research findings, and explains detailedly why measurement target of enterprise knowledge management should be "level evaluation" instead of "performance evaluation", and definitely points out the meanings of enterprise knowledge management level and significance of its evaluation. This paper also indicates that the design of the evaluation index system should be complete, reasonable, proper and operable.     

EPQ Model with Different Lost Sale Factor Relative to Inventory Level

It is important for enterprises' inventory management to find out the optimal production cycle and the length of shortage time,so that the total cost of inventory system can be reduced and the service level can be raised.Based on the classical EPQ model,this paper develops an EPQ model for deterioration items with different lost sale factor relative to the inventory level during shortage period.The existence of unique optimal solution is discussed by mathematic analysis and a numeric example.The sensitivity analysis shows that the parameter of losing sale has different impact on the costs of inventory system.The factors must be considered for the production inventory system to make management decision.     

基于“数字流域”的水利信息服务

探讨了流域水利信息服务在随流域数字化进程发展过程中,为了满足各类信息用户的需要而采用的信息服务模式。基于“数字流域”的水利信息服务既不同于传统的手工检索服务模式,也不仅仅是基于WEB的信息服务模式,它是基于由多种前沿技术共同支撑所建立的、以水利信息为主体的流域信息资源网,面向全流域各类水利信息用户的复杂多变的信息需求的新的服务模式。     

农机服务体系建设中的资源整合

在农机化的快速发展过程中,农机资源本身也需要以更多的实现形式进行平衡的资源优化配置和整合,以更好的投入产出水平发挥它在农业生产、加工中的作用,适应未来农机服务市场的变化.     

The quality of service provided by the irrigation department to the users associations, Tunuyan System, Mendoza, Argentina

The quality of service provided by the provincial Irrigation Department (DGI) to the Water Users Associations (UA), and subsequently by the UA's to the related water users, is based on the provincial water law. The intended volume of water being delivered per considered period further depends on the water availability and on the (crop irrigation) water requirements. The Service Level (SL) compares the intended water supply with the water supply that would be required to supply the entire irrigable area with sufficient water. As soon as the intended water delivery pattern is set, the measured actual delivery can be assessed against the intention. Several performance indicators are used in this context. Based on the assessment of the Water Delivery Performance Ratio and the Overall Consumed Ratio recommendations are made on changes which can be made to improve water use and reduce problems of waterlogging.     

水井酸处理效果预测研究

水井酸处理效果预测一直缺乏成熟的方法。提出了根据水位恢复曲线形态和含水层裂隙特征来预测井的首次酸处理效果，经与石油界所用方法有明显不同。石油界普遍认为，只有不位恢复曲线为快速上翘型的低产碳酸盐岩井才适合酸处理（即基质酸化），但作者近年来发现，多数水位恢复曲线为直线型的低产碳酸盐岩井，即井中含水层裂隙平均宽度＜5mm的井，酸处理效果也很好，被调查3眼这类井的单位涌水量增加值平均为423％；水位恢复曲线为缓慢上翘型的井中，部分含水层裂隙被松散物充填的井，采用特殊的酸处理方法处理后，井的单位涌水量可增加100％。另外，采用适当的方法，使用足够数量的酸进行首次酸处理后，水井再进行酸处理一般效果都很差。     

沼气物业服务体系模式分析

本文仔细分析了我国南北方沼气服务案例的具体环境、背景和优缺点。并以此为基础,结合我国沼气建设的现状和特点,通过归纳总结,提出了政府支持下的物业服务模式是今后发展的主要方式的结论,希望能为我国各地沼气事业的永续发展提供借鉴。     

基于GPS和GSM短消息的农田信息采集系统

分析了通过GSM SMS传递信息的优点，研究了如何应用Siemens M20 GSM模块和Rockwell的Jupiter GPS OEM板进行移动模块单元的软件和硬件设计。针对当前农田信息(土壤水分等)采集、记录、处理等技术比较落后以及浪费大量人力物力的状况，设计了农田信息采集系统。本系统利用当前技术比较成熟的GSM蜂窝数字移动通信系统和GPS全球定位系统对农田信息进行采集和传送。     

浙江省农业机械化水平的总体评价与地区比较

为科学评价农业机械化发展水平,在分析现有农业机械化水平评价方法的基础上,根据浙江省农业机械化发展现状及有关文献,建立和确定了浙江省农业机械化水平评价指标体系、评价标准以及各评价指标的权重;最后,利用2005年浙江省和其所属11个地(市)的有关统计数据计算出全省和各地区的农业机械化水平.评价结果表明,与实际情况基本一致,为加强农业机械化的宏观管理提供了科学依据.     

基于NNARMAX模型的地下水位预报研究

区域地下水系统是一个受多种因素影响的复杂的非线性动态系统 ,应用遗忘因子的递归最小二乘( RLS)算法进行训练 ,采用通过减少网络节点间的连接权值 ,进而裁减冗余节点来选择适宜的网络拓扑结构 ,建立了非线性自回归滑动平均神经网络 ( NNARMAX)模型 ,地下水位预报结果表明 :通过对网络结构的优化达到了自动确定非线性自回归模型阶数和影响因素的选择 ,能有效地表示区域地下水动态系统内部及其外部诸多影响因素间的不确定关系 ,是预测区域地下水动态变化较为有效的方法之一。