煤抽出物中含硫化合物的分离

采用硅胶柱色谱与配位体交换薄层色谱（ＰｄＣｌ２／ＳｉＯ２）两步分离，从煤的索氏抽出物芳烃馏分中分离出含硫多环芳香化合物（ＰＡＳＨ）和其他芳香组分，并用毛细管气相色谱（ＦＩＤ和ＦＰＤ）与色质联用仪分析了它门的组成结构。     

单喷管轴对称引射器／扩压器装置几何尺寸对性能的影响

本文分析了单喷管引射器／扩压器装置几何尺寸对其性能的影响，提出了若干在设计中应遵循的几何尺寸范围，以利于设计高效引射器／扩压器装置，对提高舰船生存能力具有实际应用价值．     

和谐社会建设中的高学历“假文凭”问题

高学历文凭实质上蕴有和谐社会的民主法治、公平正义、诚信友爱、充满活力、安定有序、人与自然和谐相处所有特征的潜质,满足和谐社会尊重劳动、尊重知识、尊重人才、尊重创造的建设方针.而假文凭的大量出现与进一步泛滥,从冲击公平正义开始,无一例外地冲击、危害着和谐社会的所有特征与建设方针,要从假文凭泛滥机制的分析入手,探索实践建立学历网上档案查询系统和启动学历学位立法为核心的高效的社会综合治理机制.     

“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.     

On value-judgements and ethics in health technology assessment

The widespread application of technology in health care has imposed a broad range of challenges. The field of health technology assessment (HTA) is developed in order to face some of these challenges. However, this strategy has not been as successful as one could hope. One of the reasons for this is that social and ethical considerations have not been integrated in the HTA process. Nowadays however, such considerations have been included in many HTAs. Still, the conclusions and recommendations of the HTAs are not followed. The reason for this may be that the methods for integrating ethics for HTA are not sufficiently developed, or that they are not adequate. This article presents a supplementary approach to the ethical inquiry in HTA. It is argued that a value analysis is crucial in order to address the ethical issues of health care technology in a fruitful way and to make viable decisions about such technology.

从"深圳制造"到"深圳创造"--论高新技术产品自主品牌的创新之路

创造自主品牌是与"贴牌"截然不同的一种品牌经营模式,自主品牌是"深圳创造"的标志.依据"微笑曲线"和"跳蛙战略"理论,深圳培育高新技术产品自主品牌极具紧迫性,近年来深圳高新技术产品自主品牌建设具有五个方面特征以需求为导向的自主品牌创新路径;高新技术产品自主品牌名扬海外;研发和专利奠定自主品牌的根基;众多科技企业家高擎自主品牌大旗;民营科技企业成为创自主品牌的生力军.     

Alcohol abuse on a college campus: A needs assessment

This paper reports the results of a needs assessment study conducted by a university-based alcohol abuse prevention project. Data are presented on the drinking patterns and drinking problems of a random sample of 462 students. Results suggest that students are experiencing numerous difficulties in the physical, educational, legal and psychosocial areas due to their use of alcoholic beverages. Implications for prevention and intervention programming are discussed and the need for planning programs from a data-based perspective rather than a rational and intuitive approach is stressed.     

Systems engineering: A problem-solving approach to improving program performance

Evaluation methodologies have generally emphasized the measurement and assessment of program merit, as reflected by the achievement of program objectives. Less attention has been devoted to analyzing and explaining the reasons for deficient performance and, more importantly, what needs to be modified to improve performance. While evaluators do identify performance problems, the identified problems are not always analyzed. Consequently, the information reported to decision makers may be incomplete, inconclusive, and of limited utility in the decision-making process. This article describes an evaluation methodology based on problem solving techniques which can be effective and efficient in defining and analyzing problems which impair program performance. The model can be applied in evaluations where the purpose is to provide decision makers with information and recommendations to improve program performance and provide an alternative to those evaluation models which emphasize the assessment of program merit. The model also provides a potentially unique cost/benefit methodology for estimating the potential worth of improving program performance (i.e., solving the problem).