糖厂酒精车间废液的处理——问题和展望

本文主要阐述糖厂酒精车间废液的处理问题和展望。本文作者认为:公害管理局提出的厌氧消化池的方法,不能产生稳定的和预期的结果,且难于达到印度标准局(I.S.I.)提出的排放标准。利用浓缩蒸馏废液作为富钾肥料与滤泥、炉灰、剩余蔗糖、蔗髓等一起制成混合肥料,明确地前供了一个较好的处理方法。     

利用巷道岩体承载能力的新型联合支架

从1978年开始,德聂伯罗彼特罗夫斯克矿业学院井建及地下构筑物教研室研究了利用巷道岩体承载能力的主要巷道用新型联合支架及其构筑工艺。众所周知,由重力(γH)限定的上覆岩层的潜在载荷主要由巷道岩体所承受,支架仅承受其中的一小部分(1～2%)。譬     

Fe-Si-O系统中各矿物的热力学性质

序言Fe-Si-O系统包括三个重要的元素.人们对该系统的矿物平衡作深入研究,是了解许多地壳、地幔和地核环境的先决条件.而这方面的资料对有关陨石、月球和行星的问题也是有意义的.Bowen等(1932)首先在1个大气压下对FeO-SiO_2系统作熔融实验,并表明了实验结果在岩石学上的意义.为了防止氧化作用,所用原料应盛在铁坩埚内,并在炉内通入氮.在     

漫谈雨中赏景

人们在外出游玩名山大川或欣赏园林胜景时,往往十分讨厌阴雨天。雨天固然给游玩、赏景带来了诸多不使,但雨中又有晴时欣赏不到的景致,正如苏轼诗中所写“水光潋滟晴方好,山色空濛雨亦奇”,雨中之景更有奇特之处。雨是自然界天气变化最为丰富的一种现象。每场雨在雨前、雨中、雨后的天气变化上,在雨量的大小、急缓上都有所不同,有着极丰富的自然变化,涉及到人的视觉、听觉、嗅觉等感官;并且春雨、夏雨、秋     

用残钛料真空试炼高钛钛铁

在真空感应炉的低真空度条件下，采用电熔镁砂坩埚，以残钛和低碳钢为原料试生产出符合质量要求的高钛钛铁。     

基于Java点对点通信技术的DES密钥交换

介绍了使用Java的点对点通信技术,基于Diffie-Hellman规则,给出了IBM DES密钥交换的总体方案、算法和应用程序,详细说明了其中涉及的主要技术和方法,同时给出了在PC机上用二进制指数分解法实现大数模运算的算法分析和实现方案。     

Intraregional income distribution and poverty: some investigations for the Netherlands, 1960-81

"This paper is addressed to intraregional income inequalities in the Netherlands. Various concepts are used to measure the degree of regional poverty. In addition, dissimilarity between intraregional income distributions is studied. At the provincial level, relatively small and decreasing dissimilarities are observed. However, at lower spatial levels (especially within metropolitan areas) much larger dissimilarities in mean income and income distribution occur. In the Netherlands, urban poverty has become a more intense and widespread phenomenon than rural poverty."     

Evaluation of a supermarket twin-checkout involving forward and backward operation

Cashier workplaces recently put into service in self-service shops of a retail company provide a face-to-face position of two cashiers. These twin-checkouts involve both traditional goods handling from the front to the rear as well as a reverse technique - i e, forward operation from behind. By means of different methods they have been analysed from an ergonomics point of view and evaluated in respect of operators' workload resulting from the specific layout. The results support the conclusion that the new 'backward' system and twin-checkouts are not inferior to traditional single checkouts. On the contrary, a working technique where the arm moves from behind to the front involves a better approach to accounting for physiological characteristics and obviously allows a better fitting of the task of operators.