基于“时空分离”的苏南乡村空间转型及其风险

基于吉登斯的“时空分离”理论,通过对影响苏南乡村空间形态变迁的历史事件追踪,对苏南乡村空间转型的动力机制进行分析,并揭示乡村空间转型可能带来的社会风险.分析结果表明:改革开发以来,乡村社会关系大体经历了由村域内时空延伸到城乡间时空延伸,再到跨区域时空延伸三个阶段,与之对应的是乡村空间生产、分化和重构的空间转型过程.市场经济和政府干预两个脱域机制的耦合是推动苏南乡村空间转型的根本力量.乡村空间转型可能带来的风险包括:市场力量的无限扩张将可能对乡村社会造成过度的侵蚀;政府主导下的新农村建设将可能导致农民自主性危机;资本与权力的联姻将可能导致空间正义的丧失;自上而下的乡村集中社区建设将可能导致村庄的终结.     

Cleaner phosphogypsum,coal combustion ashes and waste incineration ashes for application in building materials: A review

Application of phosphogypsum, coal combustion ashes and waste incineration ashes in building materials has been limited by the presence of minor components that are hazardous, such as radioactive substances, chlorinated dioxins and heavy metals, or have a negative impact on product quality or production economics, such as phosphate, fluoride, carbon and chloride. Source reduction, destruction of persistent organics and separation techniques may reduce the concentrations of such components. With a few exceptions, separation techniques currently lead to significantly higher (private) costs. Higher waste disposal costs, tighter regulations and higher prices for competing virgin minerals could make the use of the purified phosphogypsum and ashes in building materials more attractive.     

干扰床分选机在泉店选煤厂的应用

 摘要：文章简述了干扰床分选机在泉店选煤厂的使用情况,介绍了其工作原理和分选效果。两台干扰床分选机提高了粗煤泥的处理量,但分选效果不佳。如果采用更好的分级设备来保证干扰床分选机的入料粒度范围,就能更好地发挥干扰床分选机的优势,完善该厂煤泥水处理工艺。     

旋转流管式微滤膜过滤通量的研究

利用无机盐SiO2 在旋转流场中进行的分离实验 ,对进料方式、悬浮液浓度及压力等影响过滤通量的因素及其变化规律进行了探索 ,并通过工程实际应用检验 ,结果表明旋转流过滤是一种有效的强化过滤方法     

Separation in vertical temperature gradient packed thermodiffusion cells: an unexpected physical explanation to a controversial experimental problem

New experimental material is presented and discussed to assess the physical phenomena yielding to almost complete solute separation in the so-called vertical gradient packed thermal diffusion column (PTC). The separation efficiency of this experimental device has been observed by some experimenters, but no convincing theory has been established so far. It has been assumed that thermal diffusion (or Soret effect) or even thermogravitational separation (coupling between thermal convection and thermal diffusion) could provide potential explanations for the observed phenomena. The experiments that are discussed here, suggest that thermal diffusion is likely to play but a marginal role in separation, whereas a distillation process promoted by a bubble, called gas membrane distillation, seems to provide a better explanation. This statement may have important consequences for the in situ separation of natural oils and for industrial applications.     

基于容器的IoC控制反转模式的研究

目前控制反转IoC(Inversion of Control)模式广泛应用于各种应用程序框架,像Spring、PicoContainer和Avalon等这些流行的轻量级容器,都分别支持不同方式的控制反转模式的实现.首先介绍控制反转模式的设计思想及依赖注入、关注分离、依赖倒置原则等相关概念,并通过三个具体的实例就控制反转模式在以上三种框架下的具体实现进行分析,比对控制反转模式在适应各自容器需求的基础上所体现的优点和不足之处,探讨其优劣,展望其发展前景.     

旋流分离技术的现状与应用前景

在简述了液液旋流分离器的基本结构和工作原理及特点的基础上 ,介绍了旋流分离技术用于油污水处理、原油或其他油品脱水、液化气脱胺等方面的研究与发展现状 ,并展望了旋流分离技术在液液分离过程中的应用前景     

明胶组分的分离

本文综述了明胶组分分离的几类方法,并比较了它们的特点。根据不同的目的,可依据溶解度,分子形状、大小及电荷性质的差异,对明胶组分进行分离。最后,指出方法自身的改进及多种方法的联合运用将更有助于明胶组分的有效分离。     

水管体制改革后的黄河水利工程管理及维护

黄委会水管体制改革结束后,＂管养分离＂体制框架初步形成,就水利工程维护中存在的资金运行缓慢、维修项目缺漏、工作程序不规范及人员素质不齐等一系列需要完善的问题,进行了具体分析,提出了相应对策,为今后的水管工作开展提供依据.     

高量铑或铜铁镍铑共存时铂钯的分离测定

针对铑严重干扰D_bDO法测定铂的问题,研究表明,在5～10M盐酸中,当采用碘化钠代替氯化亚锡将Pt(Ⅳ)还原为Pt(Ⅱ)并显色时,铂的有色络合物能与大量铑分离(氯仿萃取).钯可在萃铂前用D_bDO和氯仿分离测定.