Numerical modeling of an explosion plasma generator,taking into account radiative energy transport and evaporation of the walls

Using a generalized theoretical model, we study the effect of geometrical dimensions and a variety of physical processes on the operation of the explosion plasma generator.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 43, No. 6, pp. 1012–1020, December, 1982.     

Electrical conductivity and porosity relationship in metal foams

This paper presents a literature review of the experimental data and different authors’ proposed equations related to the measurement and modelling of the electrical conductivity of metal foams. The analysis is based on the classification scheme that considers two different foam categories: open-cell and closed-cell foams. A new empirical equation is presented to describe the relationship between porosity and electrical conductivity in foamed materials. The aim of this equation is to encompass the different behaviours previously described for different types of foams in a single equation.     

广州市城市总体发展战略规划实施总结研讨会综述

广州市在国内第一个开展战略规划工作,再开先河进行战略规划实施总结评价,这是对快速城市化时期和市场经济体制下城市规划编制、实施和管理工作的方法和体制的探索。文章在广州市战略规划编制工作回顾及其实施总结的基础上,对全国专家学者在“广州市城市总体发展战略规划实施总结研讨会”上的研讨发言进行了归纳、综述。     

LNG接收终端

文章描述了液化天然气(LNG)接收终端的主要功能,介绍LNG接收终端的工艺流程,为求能使同行们更好的了解这类新兴燃气场站,同时探讨了LNG接收终端在我国的发展新方向,并对LNG接收终端在我国的发展提出了几点建议。     

澳大利亚零碳展示房

1背景简介在澳大利亚,民用住宅已经成为碳排放增长较快的板块之一.预计在2020年,民用住宅将比1990年增加61％,因此,想要达到澳大利亚的以2000年为基准,在2020年和2050年相继减排5％和80％的目标,需要对将建的和已建的民用住宅进行大量的碳减排.2007年,为了倡导民用住宅的减排和维护国家未来的持续发展,澳大利亚联邦科学院( CSIRO)的能源转型研究中心设立了澳大利亚零碳房( AusZEH)项目,致力于展示和评估适用于澳大利亚的低碳民用住宅技术.     

每个人心中（或严肃，或轻浮）都有一座花园

欧洲中世纪的修道院是远古之流和信仰之流交织的源泉。这些修道院的中央都有一个花园,这里用于放置最重要的东西,如最美丽的植物和药草等。在规定的时间,僧侣和修道院院长会在这里聚集。花园并不是日常活动的场所     

Ecosystemic effects of salmon farming increase mercury contamination in wild fish

Net-pen salmon aquaculture has well-known effects on coastal ecosystems: farm waste increases sediment organic content and the incidence of sediment anoxia, supports increased production of deposit-feeding invertebrates, and attracts higher densities of demersal fish and other mobile carnivores. These impacts are widely considered to be localized and transitory, and are commonly managed by imposing a period of fallowing between cycles of production. The implications of these ecosystemic effects for contaminant cycling, however, have not previously been considered. We found elevated levels of mercury in demersal rockfishes near salmon farms in coastal British Columbia, Canada, attributable to a combination of higher rockfish trophic position and higher mercury levels in prey near farms. Mercury concentrations in long-lived species such as rockfishes change over a longer time scale than cycles of production and fallowing, and thus at least some important effects of fish farms may not be considered transitory.     

基于引力场的基坑悬臂式支挡结构设计与实践

基坑工程的质量依赖于科学合理的基坑设计、详细周密的地质勘察、精心细致的施工作业、可靠有效的实时监测。基坑工程的支护形式多种多样,悬臂式支挡结构就是其中之一,目前尚没有人能对悬臂式支挡结构确切的工作机理给出一个令人满意的解释,悬臂式支挡结构在坑底以下的嵌固深度计算也缺少可靠的理论公式,因此导致悬臂式支挡结构出现事故的现象时有发生,因此悬臂式支挡结构嵌固深度的合理确定就成了悬臂式支挡结构成功与否的关键。以长年的基坑工程实践与理论研究为基础,结合地球引力场理论,对悬臂式支挡结构确切的工作机理作出一个比较切合实际的解释,指出了支挡结构底部与接触岩土体间的摩擦力对悬臂式支挡结构稳定的关键作用,给出了悬臂式支挡结构嵌固深度计算的理论公式和工程实例。     

羊毛/水溶性纤维织物的轻薄化处理

对羊毛／聚乙烯醇纤维混纺织物进行去除聚乙烯醇、保留羊毛组分处理，然后对织物表面进行钝化鳞片层和改性有机硅处理，实现了羊毛织物的轻薄化和防毡缩。结果表明，采用逐步升温和大浴比(1：50)工艺，聚乙烯醇纤维去除较彻底。鳞片层钝化工艺为：双氧水用量40g／L，稳定剂101用量8—10g／L，温度50℃，pH值9；有机硅配比为20：80时，织物的弹性、平滑性和柔软性最佳。