三元吸收制冷的研究进展

氨—水和溴化锂—水是目前使用最广泛的两种二元吸收工质对，但各有缺陷，为此人们希望采用三元吸收工质克服这两种二元工质对的不足。国外许多学者对三元吸收制冷尤其是氨—水—溴化锂三元吸收制冷作了大量理论和试验研究，国内未见这方面的文献发表，该文从物性和循环两方面对这些研究作简单介绍，并对三元吸收制冷研究简单展望。     

Hot-Dip Galvanized Sheet Production and Application

1　ＨｉｓｔｏｒｙｏｆＨｏｔ ＤｉｐＧａｌｖａｎｉｚｅｄＳｈｅｅｔＰｒｏ ｄｕｃｔｉｏｎ　　Ｉｔｉｓａｓｔｒｉｋｉｎｇｆａｃｔｔｈａｔｏｎｅｔｅｎｔｈｏｆｉｒｏｎａｎｄｓｔｅｅｌｐｒｏｄｕｃｔｓａｒｅｃｏｒｒｏｄｅｄ .Ｐｅｏｐｌｅｔｒｙｔｈｅｉｒｂｅｓｔｔｏａｖｏｉｄｏｒｒｅｄｕｃｅｔｈｅｃｏｒｒｏｓｉｏｎｏｆｉｒｏｎａｎｄｓｔｅｅｌ.Ｚｉｎｃａｓａｍｅｔａｌｗａｓｆｉｒｓｔｆｏｕｎｄｔｈａｔｉｔｃｏｕｌｄｐｒｏｔｅｃｔｔｈｅｓｔｅｅｌｆｒｏｍｃｏｒｒｏｓｉｏｎｂｙｃｏｒｒｏｓｉｏｎ ｐｒｏｄｕｃｔ…     

Task versus relationship conflict, team performance, and team member satisfaction: A meta-analysis.

This study provides a meta-analysis of research on the associations between relationship conflict, task conflict, team performance, and team member satisfaction. Consistent with past theorizing, results revealed strong and negative correlations between relationship conflict, team performance, and team member satisfaction. In contrast to what has been suggested in both academic research and introductory textbooks, however, results also revealed strong and negative (instead of the predicted positive) correlations between task conflict, team performance, and team member satisfaction. As predicted, conflict had stronger negative relations with team performance in highly complex (decision making, project, mixed) than in less complex (production) tasks. Finally, task conflict was less negatively related to team performance when task conflict and relationship conflict were weakly, rather than strongly, correlated. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Psychological separation, attachment security, vocational self-concept crystallization, and career indecision: A structural equation analysis.

Structural equation modeling was used to test theoretically based models in which psychological separation and attachment security variables were related to career indecision and those relations were mediated through vocational self-concept crystallization. In contrast to previous studies, which have found either weak or no support for a relation between separation or attachment security variables and career indecision, results based on a sample of 350 college students indicated that some components of separation and attachment security did relate to career indecision in a theoretically supportable direction. Results also revealed that regardless of whether global or component career indecision measures were used, separation and attachment security effects on indecision were at least partially mediated through vocational self-concept crystallization. The strongest mediated relations were observed for the effects of attachment anxiety and maternal separation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

光敏树脂及其紫外光固化涂料发展新动向

按紫外光固化涂料形态分类,并着重从光敏树脂方面综述了近年来紫外光固化涂料及其光敏研究及开发的新动向。在开发油性紫外光固化涂料新品种、提高其综合性能、拓宽应用领域的同时,研究开发水性紫外光固化涂料、紫外光固化粉沫涂料是目前紫外光固化涂料的重要发展趋向:在完善线形光敏齐聚物的同时,研究水溶性光敏齐聚物、树枝形和超支化结构聚合物体系又成为紫外光固化涂料用树脂研究的新热点。     

Dynamique motivationnelle de l'epuisement et du bien-etre chez des enseignants africains.

This study examines the links between antecedents and consequences of Gabonese teachers' (N= 152) work motivation. The theoretical underpinnings are based on the Motivational Model of Job Burnout (MMJB) which is grounded in Self-Determination Theory (SDT) and states that the more supervisors satisfy an employee's need for self-determination, competence, and relatedness, the more self-determined is the latter's work motivation. The level of self-determined motivation has an impact on job satisfaction, which in turn determines life satisfaction. Higher levels of self-determined motivation also buffer emotional exhaustion and psychological distress. The model was confirmed via structural equation modeling and provides support for the validity and generalizability of the MMJB and SDT. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

尖晶石型软磁铁氧体纳米材料的制备研究进展

介绍了软磁铁氧体纳米材料的特性,综述了近年来具有尖晶石结构的软磁铁氧体纳米材料的制备方法。其中包括:化学共沉淀法,水热法,溶胶-凝胶法,喷雾热解法,微乳液法,相转化法,超临界法,冲击波合成法,微波场下湿法合成,爆炸法,高能球磨法,自蔓延高温合成法等。详细介绍了各种制备方法的特点,研究进展及其发展趋势。     

Employment status passages and psychosocial well-being.

Medical students entering the labor market were studied to find out whether the improvement of psychosocial well-being depends on characteristics of their careers. Psychosocial well-being was described on the basis of psychosomatic stress symptoms, psychological distress (General Health Questionnaire), and strain resistance resources (Sense of Coherence). The 3-year follow-up showed that among women the improvement of strain resistance resources was delayed in the group with several entries into work. Among men the findings suggested associations between stress symptoms and career characteristics. Most of the results, however, did not support the hypothesis about the division of the participants into those with a stable career and improving well-being and those with a fragmented career and low well-being. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

关于项目管理中施工进度控制的研究

阐述了项目管理中施工进度控制的地位与作用，分析了影响工程进度的因素，提出项目进度控制需做好的工作，以提高进度控制水平，确保合同工期的实现。     

New Tractable Classes From Old

The constraint satisfaction problem is known to be NP-hard in general, but a number of restrictions of the problem have been identified over the years which ensure tractability. This paper introduces two simple methods of combining two or more tractable classes over disjoint domains, in order to synthesise larger, more expressive tractable classes. We demonstrate that the classes so obtained are genuinely novel, and have not been previously identified. In addition, we use algebraic techniques to extend the tractable classes which we identify, and to show that the algorithms for solving these extended classes can be less than obvious.