载体两性电解质等电聚焦电泳及其在重组蛋白药物研究中的应用

载体两性电解质等电聚焦电泳技术是蛋白质理化性质研究的核心技术之一。对其基本原理、材料和方法、以及技术特点等作了介绍。综述了等电聚焦技术在重组蛋白药物研究中的应用,并对其今后的发展方向作了展望。     

亏损上市公司价值相关性实证分析

会计盈余是影响上市公司股票价值的一个重要因素。以我国亏损上市公司为对象,根据亏损性质的不同将亏损公司分为单赤字公司、虚双赤字公司、实双赤字公司以及三赤字公司四类。实证分析显示：亏损最为严重的是三赤字公司,其会计盈余和权益账面价值与股价之间均不存在显著的相关性。     

The crowding-out effect of elderly support expenditure on household consumption from the perspective of population aging: Evidence from China

The pace of aging in China is accelerating, from the introduction of family planning to the liberalization of the two-child policy, with a growing proportion of families in the 4–2-1 structure. With filial piety in mind, most adult children will live with their elderly parents and share income and expenditure. Concurrently, due to the inadequacy of the social security system, a heavy supplementary burden of supporting the elderly has been placed on adult children. Based on data from the 2011, 2013, 2015, and 2017 Chinese Social Survey (CSS) of the Chinese Academy of Social Sciences (CASS), this study analyzes the objective factors affecting household elderly support expenditure using the ordinary least squares (OLS) estimation method. It also examines the crowding-out effect of elderly support expenditure on the consumption of different types of households through a panel generalized method of moments (GMM) approach. Finally, the crowding-out effect of elderly support expenditure is discussed in a sub-sample according to the number of households needing to support the elderly aged 60 and above. The empirical results illustrate that there is a crowding-out effect of elderly support expenditure on household consumption, and the magnitude of the crowding-out effect varies for diverse consumption. Our study reveals that the crowding-out effect of elderly support expenditure on core consumption is the largest in a sample with different numbers of elderly persons in families. The empirical results for the sub-sample show that the larger the elderly population, the stronger the crowding-out effect of elderly support expenditure on core consumption and the less pronounced the effect on marginal consumption.     

Cultural influences on the design of incentive systems: The case of East Asia

Arguing that culture moderates the potency of various incentives in motivating employees, we propose a culture-contingent model of incentive system design in this article. Four nation-level determinants of culture are identified: historical events, economic/political structure, geographical location, and language characteristics. Based on evidence found in East Asia, specific propositions that either relate a national characteristic to some cultural attributes or predict how a cultural characteristic favours a particular type of incentive system are generated. The implications of this culture-contingent model for incentive system design in multinational firms are discussed.We would like to thank Donna Randall for her helpful comments on an earlier draft.     

西气东输工程用钢管的质量控制

简要阐述了西气东输工程钢管生产质量控制的重要性、选材及钢管技术条件确定、质量控制方案、质量控制模式，着重介绍了全过程质量控制和全过程驻厂监督的思路和方法。     

HF／VHF／UHF航空数据传输链路规约综述

描述了国外６种典型的ＨＦ／ＶＨＦ／ＵＨＦ航空数据传输链,并结合我国航空通信的现状提出一些建议。     

城市景观生态建设的研究

对城市景观生态建设的含义与内容、结构与要素、原则和步骤等方面进行了详细的叙述,并对城市景观生态建设研究中存在的问题及未来城市景观生态建设的发展趋势进行分析。提出城市景观生态建设研究应以当前城市中存在的主要问题为切入点,以未来城市景观生态建设的三大趋势:长远景观、健康景观和艺术景观为主导方向,积极结合新兴学科技术,从而有针对性地对景观生态建设中的具体问题进行研究。     

微波处理废水方法概况

综述了利用微波处理技术进行废水处理的几种应用方式,包括微波直接辐射处理法、微波作用于废水和活性炭(或其他物质)处理方法及微波与催化氧化相结合的废水处理方法。同时指出了利用微波技术处理废水的优缺点与展望。     

化学二氧化锰的研究进展

综述了化学二氧化锰的制备方法及国内外研究现状。介绍了几种常用的制备方法,碳酸锰热分解法、硝酸锰热分解法、氢氧化锰氧化法、硫酸锰氧化法和高锰酸盐还原法,并分析了这些制备方法的利弊。目前化学二氧化锰的主要工业生产方法是碳酸锰热分解法和硝酸锰热分解法。     

中国农业建设项目可行性研究存在问题与对策分析

农业建设项目可行性研究作为农业建设项目前期论证的重要手段,是一套科学、系统的研究方法,是项目投资决策的重要依据。作者介绍了农业建设项目可行性研究的内涵,总结划分了农业建设项目可行性研究的工作阶段,归纳了可行性研究工作和报告编写的主要内容,分析了当前农业建设项目可行研究存在的主要问题,提出了加强农业建设项目可行性研究的对策。提升我国农业建设项目可行性研究应从4个方面入手：一是提升对农业建设项目可行性研究的重视程度,二是紧密联系国家产业政策和企业发展规划,三是提高农业建设项目可行性研究质量,四是规范农业项目咨询行业和培育项目分析人才。