粉煤灰在市政工程中的应用

粉煤灰是燃煤电厂的工业废渣，主要来源于以煤粉为燃料的火电厂和城市集中供热锅炉，其中90％以上为湿排灰，活性较干灰低，且废水废电，污染环境，也不利于综合利用。为了更好的保护环境并有利于粉煤灰的利用。我国多数大中型电厂粉煤灰的化学成分与粘土很相似，但其二氧化碳含量偏低，三氧化二铝含量偏高。含碳量少于8％的占68％，随着锅炉燃烧技术的提高，含碳量趋向于进一步降低。     

汽油车排放法规和控制技术的发展研究

简要回顾了汽车排放法规的发展过程,对于发展的各个阶段,分析了具有针对性的汽车排放污染控制技术的内容和特点。研究了随着汽车排放法规和汽车工业的发展,汽车排放污染控制的前景及汽车排放控制技术的发展方向。     

基于SWOT分析法的川江滚装船的发展战略研究

本文采用SWOT法从优势、劣势、机会和威胁四个方面对川江滚装船在综合运输系统的地位进行定位，并从政府主管机关、行业中介组织、市场主体船东自律与潜力挖掘三方面提出一些建议。     

京杭运河特大桥水下系梁采用轻型吊箱的方案综述

在京杭运河特大桥东引桥深水高桩系梁施工中,采用了轻型吊箱的方法,吊箱重量仅为11t,悬吊系统、内支撑系统及下沉系统经实践证明,安全可靠、优质快捷、并可节约成本。本文概要介绍吊箱的构造及检算方法,吊箱施工的工艺流程及施工要点。     

伯恩斯坦多项式在收敛区间上的逼近度

在伯恩斯坦多项式的基础上，定义了伯恩斯坦多项式在收敛区间上的一种新的形式，并采用估值逼近的方法，给出了一个较为简明的对函数的逼近度的结果．     

油酸基咪唑啉类缓蚀剂的缓蚀性能研究

以油酸与羟乙基乙二胺为原料，采用两步脱水法合成了油酸基咪唑啉，通过烷基化反应合成了多种咪唑啉衍生物．用IR、静态失重、极化曲线、SEM检测方法考察合成缓蚀剂的缓蚀性能．研究结果表明：油酸与羟乙基乙二胺经150℃和200℃两次脱水反应，可成功合成油酸基环状咪唑啉；当油酸与羟乙基乙二胺摩尔比高于1：1．2时，获得的缓蚀剂在加入量很小的情况下，缓蚀率就可达到90％以上；此外溶液的pH、缓蚀剂用量对缓蚀剂的缓蚀性能也均有影响．     

Two Phase Pressure Drop Performance of Refrigerant in a Small Horizontal Smooth Tube with 2.5 mm inside Diameter

Two-phase flow pressure drop measurements were made during the phase change heat transfer process of R22 in a small horizontal smooth tube with 2.5 mm inside diameter. Conclusions can be drawn that the quality corresponding to the pressure gradient peak value of small tubes became higher than that of large tubes. The effect of quality to pressure drop becomes weak as the mass flux increases. The experiment data were compared with the predicated values of the state-of-the-art correlations from the open literature. The comparisons between the data and the predictions indicate that most of the state-of-the-art correlations fails to predict the experimental data.Chisholm model shows a relatively better predictive ability than the other empirical correlations although it has a mean deviation of 26.7%. But the predicated values of Chisholm model are lower by 50% than the experimental data when the quality becomes larger.     

The Evaluation and Selection of Outsourcing Suppliers in Mass Customization （MC）

Many MC companies find it necessary to cooperate with a large number of outsourcing suppliers to provide MC products according to customers＇ diversified orders. To this end, how to select competitve suppliers for the outsourcing manufacturing of non-core processes is the key to establish strong supply chain ally of MC company as well as make the company more efficient in its core manufacturing processes. A procedure of selecting outsourcing suppliers was presented to identify and find competitive suppliers. The continuous improvement of this procedure was proposed to ensure the optimal supply chain of MC company in the long run. Besides, a multi-criteria evaluation model in the procedure was set up according to MC＇s characteristic with fuzzy multi-criteria methods combined to solve the fuzzy problems of criteria weight and qualitative attribute value. A case study of MC manufacturing company was provided to show that the procedure ,model and methods are effective to select outsourcing suppliers.     

Effects of Vitamin E and Selenium on Free Radicals Metabolism of Broilers

Since Haman (1982) firstly postulated freeradical theory, the metabolisms and functions offree radicals in animal organisms has arouse greatconcerns in the biology research field. In the pro-cedure of normal organism material metabolism,there exists dynamic balance among the producing,utilizing and clearing of free radical. VE is an im-portant antioxidant in the organism and breaksperoxidation of lipids associated with vitamin C(VC)[1,2]. Selenium (Se), as part of the active siteof GSH-Px[…     

CHONDROCYTE APOPTOSIS IN ARTICULAR CARTILAGE WITH KASHIN-BECK DISEASE

Kashin BeckDisease(KBD)isachronic,en demicosteoarthritisaffectingover0.81millionspa tientsand101millionsofpeopleatriskinChina[1]. Thebasicpathologicalfeaturesofthediseaseis chondrocytesdegenerationandnecrosisinthedeep zoneofarticularcartilageandgrowthpl…