直接合成法制备ZSM-5分子筛及其催化性能的研究

在不添加任何模板剂的情况下,通过控制晶化条件,仅凭Na+诱导晶体形成,采用水热合成法直接制备出ZSM-5分子筛,并对合成的样品进行X射线衍射、红外光谱照射、扫描电镜扫描,表明该分子筛具有典型的ZSM-5结构。该分子筛经转型后,通过TG检测其酸性,并用于环己烯水合制备环己醇反应,表现出良好的催化性能,反应4 h后,环己醇...     

头孢唑肟钠合成工艺研究

为优化头孢唑肟钠合成工艺,考察了碱种类、有机溶剂、醇水体积比、反应温度等条件对头孢唑肟钠反应收率的影响。确立了较优化的合成工艺条件：以异辛酸钠为转钠剂,异丙醇为溶剂,当异丙醇和水体积比为10：1时,头孢唑肟钠收率为91.8％,纯度为99.34％(HPLC),符合《中国药典》2010年版二部标准规定。此方法工艺简单,易于...     

浅谈城市综合执法之现状及对策

城市作为现代文明的标志,是经济,政治,文化等的中心。在经济全球化中,中国的城市管理面临严峻的考验,介于此,本文主要从执法的基本内涵,特征,及综合执法在现阶段存在的问题等方面做了一些粗浅的思考,并且针对存在的一些问题提出了几点建议,以期能对综合执法在现阶段的完善与发展有所帮助。     

基于多属性综合评价法的房地产企业合作伙伴选择

房地产行业是资金密集型的行业,在国家不断加强宏观调控的情况下许多房地产企业融资发生了困难,在其他融资渠道不畅的情况下,寻求与有实力的公司进行合作开发,无疑可以增强自身的生存能力。应用多属性综合评价方法,为房地产企业选择合作伙伴提供了一种方法。     

BOT项目风险模糊综合评价模型及其应用

针对BOT项目风险体系复杂这一特点,采用多层模糊分析与层次分析法相结合,提出了一种综合考察BOT项目中各风险因素的多级模糊综合评价方法。最后以S省某道路建设BOT项目为例,介绍了该方法的应用。     

The Effects of the Perceived Behavioral Integrity of Managers on Employee Attitudes: A Meta-analysis

Perceived behavioral integrity involves the employee’s perception of the alignment of the manager’s words and deeds. This meta-analysis examined the relationship between perceived behavioral integrity of managers and the employee attitudes of job satisfaction, organizational commitment, satisfaction with the leader and affect toward the organization. Results indicate a strong positive relationship overall (average r = 0.48, p<0.01). With only 12 studies included, exploration of moderators was limited, but preliminary analysis suggested that the gender of the employees and the number of levels between the employee and the manager are potential moderators of the relationship. In the current sample of studies, country where the research was conducted did not seem to have any moderating effects. In addition to suggesting further investigation of potential moderators, we call for research that examines the relationship between behavioral integrity and outcomes that include individual behavior and organizational performance.     

乙二醇合成技术的研究进展

介绍了环氧乙烷法合成乙二醇的研究开发进展,重点介绍了环氧乙烷催化水合法和碳酸乙烯酯法制乙二醇的研究进展,提出了我国今后的发展建议.     

氨合成危险工艺自动化控制改造的设计及探讨

随着科技的日新月异,自动化控制在化工生产中的发挥的作用不断增强,全国上下展开了合成氨生产装置工艺自动化控制改造。本论文仅对氨合成工段的改造进行探讨。     

On science and reform: the parable of the new economics, 1960s–1970s

The article considers Paul Samuelson, Robert Solow, James Tobin, Walter Heller, and Arthur Okun qua political economists. The focus is on their combination of a faith in economic science and a passionate public spirit. The article aims to substantiate two related arguments. The first is that these “new economists” were public intellectuals, regularly addressing public opinion, and engaging with the major economic and social issues of the times; the second is that their value judgements gained the upper hand over scientific discourse when they were confronted with the 1970s inflation.     

李约瑟之谜与长期经济增长——一个文献综述

在经济史文献研究中,李约瑟之谜引起了国内外学者广泛的研究兴趣。在技术等各方面曾一度领先,直到16、17世纪仍与西欧国家站在同一起跑线上的中国为何迅速衰落,又在改革开放以来重新崛起?是什么因素导致一国出现长期经济增长和经济繁荣?文章对已有文献进行梳理的基础上,尝试在众多的经济变量中分离出决定长期经济增长的关键因素,以期对此类文献的研究提供新的视角。