六次甲基四胺合钴（Ⅱ）配合物的室温固相合成及其热色性

以六水合二氯化钴与六次甲基四胺为原料通过室温固相反应制得了钴（Ⅱ）-六次甲基四胺配合物，采用化学分析、IR、DTA和TG等手段对合成产物进行了袁征．并与液相合成法进行了比较，结果表明：配合物中Co（Ⅱ）与六次甲基四胺的物质的量之比为1：2，将六水合二氯化钴与六次甲基四胺以不同比例混合反应，所得的产物组成都为CoCl2·2C6H12N4·6H2O，该配合物具有良好的热致变色性能．     

加入WTO对中国上市公司的影响

我国入世以后，各行各业都将经历新的洗礼，证券市场也不例外。尽管由于金融业的特殊性，入世协议允许中国享受一定的待遇和保护性条款，允许存在一定阶段的保护期，但可以预见的是，随着时间的推移，外资将逐步进入中国证券市场，其对中国证券市场上市公司的结构、价值评判体系、行业背景和竞争压力以及监管方式等各方面都将带来深刻的影响，并引导中国的上市公司逐步按照市场化、国际化准则来规范运作。     

上海市外来从业人员参加综合保险意愿调查

83 %的上海市外来从业人员认为《上海市外来从业人员综合保险暂行办法》保障了他们的权益 ,但只有 5 8 7%的人愿意参加该综合保险。通过x2 检验 ,影响参加综合保险的因素主要有性别、文化程度、职业、收入水平、在沪已经工作年限、在沪工作年限意愿和对保险的了解程度等。外来从业人员最希望得到的保障是养老保险 ,险种偏好与职业、文化程度相关 ,而与收入等因素无关。外来从业人员保险应该反映参保人员的意愿 ,分层分类建立保险体制     

Microdata Access and Labor Market Research: The U. S. Experience

Summary: The paper illustrates the value of broad researcher access to survey and administrative microdata using examples drawn from the U. S. experience, outlining how analyses of trends in earnings inequality, poverty and employment dynamics using such data have benefited policy makers and contributed to improvements in statistical agency data products. Methods of facilitating researcher access, including the release of public use files, the use of licensing agreements, and the establishment of research data centers, are discussed. * The author thanks Anne Polivka, Marilyn Seastrom and two anonymous referees for helpful comments on an earlier draft of the paper.     

“The Motherhood Wage Gap for Women in the United States: The Importance of College and Fertility Delay”

One of the stylized facts from the past 30 years has been the declining rate of first births before age 30 for all women and the increase rate of first births after age 30 among women with four-year college degrees (Steven P. Martin, Demography, 37(4), 523–533, 2000). What are some of the factors behind womens decision to postpone their childbearing? We hypothesize that the wage difference often observed between like-educated mothers and non-mothers (Jane Waldfogel, Journal of Labor Economics, 16, 505–545, 1998a; Journal of Economic Perspectives 12(1) 137–156, 1998b) may be affected by the postponement of childbearing until after careers are fully established. Hence, we focus on college-educated women because they are typically more career-oriented than their non-college educated counterparts and also the group most often observed postponing maternity. We use individual-level data on women from the 1979 National Longitudinal Survey of Youth (NLSY79) in order to control for individual-level unobserved heterogeneity as well as human capital characteristics, such as actual work experience, in our empirical analysis. We estimate wage equations, first producing base-line results to compare to the existing literature. Then, we expand the basic wage equation model to address fundamental econometric issues and the education/fertility issue at hand. Our empirical findings are two-fold. First, we find that college-educated mothers do not experience a motherhood wage penalty at all. In fact, they enjoy a wage boost when compared to college-educated childless women. Second, fertility delay enhances this wage boost even further. Our results provide an explanation for the observed postponement of maternity for educated women. We argue that the wage boost experienced by college-educated mothers may be the result of their search for family–friendly work environments, which, in turn, yields job matches with more female-friendly firms offering greater opportunities for advancement.JEL Codes: J13 and J3     

The Relationship Between Wife’s Education and Husband’s Earnings: Evidence from 1960 to 2000

Previous research finds a positive relationship between a wife’s education and her husband’s earnings using data from the 1960s. Earlier theories suggest that benefits accrue from informational sharing between partners in a marriage. This paper tests the hypothesis that a wife’s education is positively associated with her husband’s earnings, using data from the 1960, 1970, 1980, 1990, and 2000 Censuses. Between 1960 and 2000, the educational attainment and labor-force participation of married women has increased dramatically. As women have embarked upon their own careers, has their education continued to be positively associated with their husbands’ earnings? Yes. The coefficient of the wife’s education remains positive and significant for all the years under study. The size of the coefficient decreases, however, from 1960 to 2000.     

从五星聚房与帝辛占星陶文看武王克商日（公元前1018年2月22日）

帝辛占星陶文记载金星的白天出现和中国传统星座二十八宿的角宿,帝辛占星陶文证明《宋书·天文志》等的帝辛末期五星聚房记录。在夏商周断代工程报告中,中国政府对于公元前1019年9月17日五星聚房事实的确认,证明了《史记》和帝辛占星陶文的记录是准确的,同时也证明武王克商的甲子日为公元前1018年2月22日。     

戴震的“理”、“欲”思想析论

戴震认为,宋儒"存天理,灭人欲"的思想造成了后世"以理杀人"的现象。为了对此进行批判,他重新诠解了"理"和"欲"这对概念。他指出,"理"就是事物的条理、分理,而涉及人事行为的"天理"则是通过以情度情而来的定然之则。这种以情度情之所以可能,是因为人人都有相同的欲望,"欲"才是一切"理"的基础。这一思想突出了"理"的客观性,对人的自然欲望进行了肯定。但是他把一切价值建立在"欲"的基础上的做法,使"理"失去了规范"欲"的作用,因此,并不能真正实现批判宋儒"天理人欲"之辨的效果。     

兵团非贫困团场的发展思路探析

在兵团的176个团场中,79个非贫困团场的发展条件虽比贫困团场要好,但因自然地理环境、产业结构等多种因素的制约,其发展同样存在诸多问题。为推进社会稳定与发展,兵团应通过因地制宜制定各垦区的发展战略,大力增强农业的辐射带动能力,以一产为基础推进团场工业化,大力引进和培养人才,推进经济社会和生态的协调发展等途径,探寻非贫困团场的发展。     

《长安大学学报（自然科学版）》2002-2012年主要文献计量指标分析

运用文献计量学方法,以《长安大学学报（自然科学版）》2002-2012年刊载的1 661篇论文为研究对象,统计论文载文量、基金论文比、第一作者职称和学历、合著率和合作度、稿源地区分布以及出版时滞等指标,从文献引证的角度反映其刊载论文的学术水平和期刊影响力,为进一步提高《学报》的学术水平和办刊质量提供一定的依据。研究结果表明：道路工程、桥梁与隧道工程是其载文的主要学科;载文量逐渐下降,论文质量逐步提升;高级职称作者群波动较大,中级职称作者群人数逐渐增多,博士研究生和硕士研究生作为新生力量有所增加;基金论文比大幅增加;作者合著率与合作度较高;论文出版时滞逐渐缩短;期刊被引率、下载次数较高,高被引论文主要集中在优势学科,以研究型论文为主,综述型文章被引频次和下载次数较高。