Assessment of semi-empirical mass transfer correlations for pervaporation treatment of wastewater contaminated with chlorinated hydrocarbons

INTRODUCTION Chlorinated hydrocarbons, a class of widely used dry-cleaning liquids, industrial organic solvents, and degreasers, increasingly find their way into drinking water sources, thus posing a very serious health and environmental problem (Love and Eliers, 1982). These organic solvents are known for their stability in the environment and cancer-causing po- tency and cannot be effectively and economically eliminated by current conventional treatment tech- nologies. One of the few av…     

Two components of responding in Pavlovian lick suppression

The present research examined the temporal distribution of responding in a lick suppression paradigm. In Experiment 1, rats were trained with either a 30- or a 120-s conditioned stimulus (CS), which was followed either by a footshock (unconditioned stimulus [US]) or nothing. Licking during the CS was suppressed only in the former condition. Suppression was more pronounced early in the CS. In Experiment 2, rats were exposed to two 30-s or two 120-s CSs, with delivery of the shock being contingent on CS1 for half of the animals and on CS2 for the other half. For both the paired and the unpaired conditions, suppression at the beginning of CS1 was observed for all the groups. By discounting the possibility of generalization between CS1 and CS2, it appears that this initial suppression was not a conditioned response to the CS, but an unconditioned one due to mere exposure to the shock US.     

10G以太网与无限宽频技术的广域性能对比

对于广域高性能应用程序来说,轻路径提供了10Gbps的连接,并且拥有PIC—E接口的多核主机可以达到这样的速率。然而要在远隔上千英里的主机之间维持这样的高吞吐率是一个很大的挑战,而且目前这方面的性能研究还很有限。我们对两种基于不同技术达到高吞吐率的方案进行了试验研究：（a）基于TCP／IP协议的10Gbps以太网;（b）无限宽频及其扩展。     

新时期加强大学生诚信教育路径思索

诚信是中华民族的优良传统美德。大学生做为我国知识文化水平较高的群体,大学生的诚信教育对创建社会主义和谐社会有着重要的意义。随着时代的发展,思想观念发生了极大的改变。本文针对大学生的诚信教育路径,提出自己的想法和意见。     

问题

我们现在从文明的西方所观察到的世界,即时间、陆地与海洋、天体与人体、植物与动物、历史和古往今来的人类社会等景象,只能是由无数的“哥伦布”为我们而揭示的。在深长的过去,这些人一直湮没无闻。随着我们日益步入现代,他们才出现在历史的视野之内——各色人物的个性同人性一样变化万端,各类“发现”成为人物生平记述中的种种插曲,与发现者为我们启示的新世界同样无法预测。     

对爱上瘾还是真爱?

Love is an intense feeling that can easily be confused with love addiction.You've been together for a while now.That euphoric (神愉悦的),queasy (令人眩晕的),sign of true love has settled down only slightly and you know this is your one and only love,your heart's desire.     

冠军

相对于母爱而言,父爱有时显得更为深沉和含蓄,但这种爱同样发自肺腑,同样炽烈。在本文看似平淡却出乎意料的结局中,两位男主人公便淋漓尽致地诠释了他们对自己儿子的那份爱。     

Application of system dynamics for assessment of sustainable performance of construction projects

INTRODUCTION Sustainable development is commonly definedas meeting the needs of the present without compro-mising the ability of future generations to meet theirown needs (WCED, 1987). All industries, includingthe construction industry should contribute to themission. Compared to other industries, constructionactivities are generally considered to have more im-pact on the environment, which provides the basicconditions for the sustainability and development oflife on the Earth. The…     

God does not play dice: causal determinism and preschoolers' causal inferences

Three studies investigated children's belief in causal determinism. If children are determinists, they should infer unobserved causes whenever observed causes appear to act stochastically. In Experiment 1, 4-year-olds saw a stochastic generative cause and inferred the existence of an unobserved inhibitory cause. Children traded off inferences about the presence of unobserved inhibitory causes and the absence of unobserved generative causes. In Experiment 2, 4-year-olds used the pattern of indeterminacy to decide whether unobserved variables were generative or inhibitory. Experiment 3 suggested that children (4 years old) resist believing that direct causes can act stochastically, although they accept that events can be stochastically associated. Children's deterministic assumptions seem to support inferences not obtainable from other cues.     

一个新概念：地域网

职业学校地区网的概念是传统地形成的。现在应当从发展市场经济的角度看待职业学校网络分布及学校管理结构的瓿。出现了地域市场－劳务市场和教育服务市场－这一概念。本讨论了建立职业教育“地域网”的一些问题。