对光伏专业校外实习基地建设的几点思考

校外实习基地是培养学生实践能力和创新精神的重要场所,是学生顺利进行实习的重要保障.当前本校光伏专业校外实习基地建设存在一些问题,需要通过双师型教师的培养、实习岗位多样化、校企产学研合作等方式,提高光伏专业校外实习基地的建设水平.     

Characterization of Titanium-Containing Compounds in Gray Iron

Titanium produces different compounds in gray iron. In order to determine their characteristics, a scanning electron microscope, an energy dispersive X-ray spectroscopy, and an optical microscopy were used to analyze the morphology, distribution, and composition of titanium-containing compounds in metal- Iographic specimens and machined surfaces in four gray irons. The results show that the titanium-containing compounds in the gray irons are complex compounds containing V, Nb, Mn, S, and other metals, depending on the concentration of these elements in the iron. The number of titanium-containing compounds increases with increasing Ti content in the gray iron. Most of the titanium-containing compounds are located in the pearlite matrix, with some in the steadite and carbides. The results suggest that titanium-containing compounds reduce tool lifetime.     

丙/氨弹力网络丝的研究

提出了丙／氨弹力网络丝的生产工艺，并对丙／氨弹力网络丝的工艺和结构进行了综合分析。     

三公开制度分析：从经济学视角研究制度价值与经济增长（上）

从新制度经济学视角研究三公开制度价值与经济增长关系。提出三公开制度是我国制度变迁的新进展，是制度非均衡的反应——制度创新。剖析了经济学分析的重要前提——人的行为特征三个新假定。从制度成本与功能着手，用实证的方法，揭示了三公开制度对三个新假定的功能内涵，并由此推演出制度的政治学价值和经济学价值。论证了制度与经济增长关系。彰显了三公开制度阳光要素的经济学内涵。     

Before结构句中的时、体用法

本文从主、从句间事件所发生的时间关系入手,探讨了before结构中时、体用法的两个问题:be-fore结构中时、体使用的一般规则;影响复合句中时、体选用的其他因素。研究表明:在许多情况下,主、从句间事件所发生的时间关系决定时、体的使用;除时间关系因素之外,事件类型、从属连词、因果关系等因素也会影响时、体的选用。     

Direct determination of trace silicon in lanthanum oxide by using a selective volatility and slurry sampling-FETV-ICP-AES

A new method for determination of trace sillicon in high purity lanthanum oxide by using electrothermal vaporization (ETV)-ICP-AES with polytetrafluoroethylene (PTFE) slurry as a fluorinating reagent has been proposed. Under the optimized experimental conditions, the fluorination reactions of analyte (Si) and matrix(La) with PTFE in the graphite furnace took place at high temperature, and the fractional volatilily between Si and La was observed. Based on this principle the matrix interference could be eliminated. The detection limit of Si was 4.0μg·L⁻¹, and the RSD was 3.4%(C=0.2mg·L⁻¹,n=10). The procedure proposed has been applied successfully to determine trace Si in La₂O₃ without any chemical pre-treatment. Supported by the National Natural Science Foundation of China Qin Yongchao: born in Dec. 1953, ph. D., Assciate Professor     

（L）型与（L^＊）型Fuzzy拓扑线性空间

本文给出Fuzzy拓扑线性空间θ_λ邻域基的充要条件,同时引进了(L)型与(L~*)型Fuzzy拓扑线性空间的概念,给出(L~*)型Fuzzy拓扑线性空间的拓扑结构,证明了(L)型Fuzzy拓扑线性空间与[2]意义下的L型Fuzzy拓扑线性空间是等价的,而且任何(L)型Fuzzy拓扑线性空间都是一种平凡的(L)型空间。     

胶束溶液中正脂肪酸乙酯的皂化反应

在２０℃和３０℃下，用热动力学面积差法（两点法）研究了极性聚合物（聚乙二醇）、ＣＡＴＢ阳离子表面活性剂及其混合胶束对乙酸乙酯皂化反应的影响；在３０℃下研究了短链醇（乙醇）与ＳＤＳ阴离子表面活性剂混合胶束对正丙酸乙酯皂化反应的影响。结果表明：单一和混合胶束对正脂肪酸乙酯的皂化反应有较强的禁阻作用。还讨论了禁阻作用的原因。     

烯效唑的气相色谱分析

采用气相色谱分析烯效唑的含量，选用ＱＦ－１固定液，Ｃｈｒｏｍｏｓｏｒｂ Ｗ．Ｈ．Ｐ为担体，以邻苯二甲酸二丁酯为内标物，该方法标准偏差０．１５％，变异系 ０．１７％，烯效唑的平均回收率为９９．５９％．     

电极的校正及应用

本文应用EDTA作为钙离子缓冲溶液,对自制涂丝钙离子选择电极(Ca-CWISE)进行了校正,与用标准系列稀释法相比,电极的线性范围扩大了三个数量级。文章还利用自制Ca-CWISE,采用Thomas等所用的简易pH-pM法,测定了柠檬酸钙的浓度稳定常数,IgK_(CaCit~-)=3.86(30℃,I=0.1)。