环境因子的定义及研究现状

从普遍接受的三个基本假设出发，讨论环境因子的定义和失效机理不变的约束条件，重点综述环境因子的研究现状和常用方法，并探讨引入反应论模型解决环境因子预测问题的可能途径。     

生态环保复合药肥的研制与生产

选用多种有机物为原料,经酵素发酵或活化处理,配入以腐植酸为载体的综合有益生物菌剂,再添加适量含氮、磷、钾、钙、镁、硫、硅的肥料及微量元素、稀土等,生产生态环保复合药肥。介绍其工艺、产品质量及特点。该药肥对生态环保和农业增产效果显著。     

High accuracy path tracking for vehicles in presence of sliding: Application to farm vehicle automatic guidance for agricultural tasks

When designing an accurate automated guidance system for vehicles, a major problem is sliding and pseudo-sliding effects. This is especially the case in agricultural applications, where five-centimetre accuracy with respect to the desired trajectory is required, although the vehicles are moving on slippery ground. It has been established that RTK GPS was a very suitable sensor to achieve automated guidance with such high precision: several control laws have been designed for vehicles equipped with this sensor, and provide the expected guidance accuracy as long as the vehicles do not slide. In previous work, further control developments have been proposed to take sliding into account: guidance accuracy in slippery environments has been shown to be preserved, except transiently at the beginning/end of curves. In this paper, the design of this control law is first recalled and discussed. A Model Predictive Control method is then applied in order to preserve accuracy of guidance even during these curvature transitions. Finally, the overall control scheme is implemented, and improvements with respect to previous guidance laws are demonstrated through full-scale experiments.     

试述盐厂重要环境因素的控制

依据GB/T14001标准,阐述了制盐生产环境因素的识别,重要环境因素的评定及其控制.同时指出了消除重要环境因素的影响,保护环境是实施污染预防的有效途径.     

土石坝无粘性粗粒料填筑标准和质量评价探讨

土石坝无粘性粗粒料填筑标准往往根据经验确定,而施工质量主要是通过碾压参数控制,理论依据不足。最大干密度和已建工程实践证明表面振动器法最大干密度与实际填筑干密度基本相等,可以直接指导设计和施工,据此提出了设计和施工控制标准;从砂砾石料、堆石料等无粘性粗粒料的特性探讨了填筑标准的适用范围,利用干密度与<5 mm粒径含量关系和填筑干密度,可以准确及时地对照填筑标准作出填筑质量评价结果。     

Study of trace elements in coal and mining wastes and its significance in China

In the world energy about 26% of all was dedved from coal combustion. Nearly 80% of the electricity produced in China is generated from coal. Coal will play the most important role in the coming 50 years as the past century in China. However one consequentially of the mining and combustion of coal is the mobilization of trace elements, especially trace metals, which have environmental and human health significance. Information on concentrations and distributions of potentially toxic elements in coal, and information On the modes of occurrence of these elements and the relations of the minerals in coal can help to predict the behavior of the potentially toxic trace metals dudng cleaning, combustion, weathering, and leaching.     

Obituaries: Martin Deutsch (1926-2002).

Reports the death of Martin Deutsch (1926-2002) and notes his contributions to the field of developmental psychology. Deutsch believed that environmental influences were critical for cognitive development during children's early years and that it was possible to design programs that would provide some of those experiences for children. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

数字电视产品认证推动标准贯彻实施

简要介绍了数字电视清晰度和机卡分离两项产品认证的进展情况，以及认证工作开展的背景、依据和模式，供有关人员在实施和贯彻标准中参考。     

谈合理布局我国铝工业问题

文章分析了我国铝工业特别是电解铝工业布局的变化及其总布局战略思考的转变过程,并从铝工业特别是电解铝工业与合理开发利用我国能源资源 合理的铝工业链以及环保等方面的关系,论述了我国迫切需要统一思想,制定出一个科学合理的铝工业总体布局产业政策以及能保证其能正确实施的经济、法律手段。     

油气吸收回收系统的研究及工业应用——(Ⅱ)工业试验及效果分析

在油气吸收回收系统中型试验的基础上，开发了常温常压吸收法工业化油气回收系统，并进行了工业应用。结果表明，该油气回收系统平均回收率可达95．13％，每年可回收汽油529t；装车期间装车口周围环境大气中总烃浓度平均降低98．06％。企业通过实施油气回收系统，节能及经济效益明显，且很好地改善了装车场所的作业环境，克服了油气排放带来的安全隐患。