水库灌区的全程节水技术

本文就水库灌区多方位的水资源浪费状况。提出了水库应采用汛限分级方法多蓄水的观点；结合降雨，作物需水等建立了水库供水、渠道输配水的高效节水模型；同时对水库——渠道——田间灌水等全程节水技术进行了探讨。     

ATM防火墙技术

ATM网络在很多方面与当今的其它通信网络不同.提出一种ATM防火墙结构,研究它对ATM的影响,提出了ATM防火墙的实现方法.为不影响ATM网络的高性能,提出了ATM防火墙中结合入侵检测的思想.     

基于AutoCAD2000的图解法确定工艺转角

提出了基于AutoCAD2 0 0 0的图解法求解机械加工过程中工艺转角的问题 ,并针对具体的应用实例给出了圆满的解答 ,并验证了其精度。     

Distinguished professional contributions to public service: Edwin Shneidman.

Presents the citation, biography, and selected bibliography for Edwin Shneidman, one of the 1987 recipients of the American Psychological Association's Award for Distinguished Professional Contributions to Public Service. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

部件试验模态综合的简便方法

本文将一种基于完备模态基的模态综合技术应用于子结构的试验模态综合,获得成功。这种半试验半理论的模态综合方法是一种较为简便的、要求试验工作量较小的试验模态综合法,因为它只要求测量子结构的振动模态和频率即可。数值仿真结果表明,这种简便的试验模态综合法是行之有效的。     

中国油田堵水技术综述

本文论述了我国油田堵水技术的发展及其在油田开发中的作用,总结和阐述了油井化学堵水技术和注水井吸水剖面调整技术的原理和效益,指明了实践证实的有成效的工艺方法和堵水技术发展方向。     

一种新型悬臂棒条筛的设计与应用

介绍了一种新型悬臂棒条筛分机械,论述了其结构、工作原理和技术特性。从理论和实践两方面论证了它的结构、处理能力、筛分效率、返矿率都明显优于普通悬臂棒条筛分机械,可广泛应用于高炉槽下烧结矿的筛分作业。     

Predicting plant yields using soil testing for phosphorus: Effects of error in the estimation of the maximum yield on interseasonal comparisons of yield prediction

Results from long-term field experiments in south-western Australia are presented in the form of relationships between yield, expressed as a percentage of the maximum yield, and soil test for phosphorus (P) values. Maximum yields were not always indicated by well defined yield plateaux. Different methods have been used to estimate the maximum yield value which is used to calculate yield as a percentage of the maximum yield so as to remove interseasonal variation. For all of these methods and for the same site, the same P fertilizer (superphosphate), and the same plant species, the relationship between yield and soil test P differed for different years. Consequently fertilizer recommendations based on the assumption that this relationship is constant are likely to be incorrect. We therefore question the validity of the common practice in soil testing programmes of using percentage yield values to remove interseasonal variation.     

保证跌落试件姿态的方法

进行包装件的自由跌落试验时,必须保证试件姿态符合标准规定。笔者在实践中总结出一种保证试件姿态和检验试件姿态误差的具体方法。     

市内通信电缆绝缘电阻特殊要求的实现和措施

本文对市内通信电缆的各生产过程进行分析、研究和控制 ,从而提出了解决绝缘电阻特殊要求的方法 ,以及改进的措施。