我国精对苯二甲酸的生产现状及发展趋势

近年来由于ＰＴＡ法逐步取代ＤＭＴ法生产ＰＥＴ,对ＰＴＡ需求增长加快;国外各大公司纷纷提出在中国的改扩建和增建计划。建议大力支持聚酯产品及其原料生产和技术国产化进程。     

聚丙烯土工布原料的应用与开发

丙纶土工布是一种新型的岩土工程材料,文章介绍了其主要生产工艺,原料使用及生产现状,并对丙纶土工布原料在品种,性能,生产现状等方面存在的问题提出相应的建议。     

Double implementation in economies with production technologies unknown to the designer

Summary. This paper considers double implementation of Walrasian allocations and Lindahl allocations in Nash and strong Nash equilibria for both private and public goods economies when preferences, initial endowments, production technologies, and coalition patterns are all unknown to the designer. It will be noted that the mechanisms presented here are feasible and continuous. In addition, unlike most mechanisms proposed in the literature, our mechanism works not only for three or more agents, but also for two-agent economies, and thus it is a unified mechanism which is irrespective of the number of agents. Received: March 12, 1998; revised version: March 12, 1998     

中国粮食生产可持续发展问题的再思与再识

粮食与人类生存、人体健康、经济发展、社会安定密切相关,在人类历史和社会进步中占有十分重要的地位。本文从理论与实践两个方面入手,论述了中国粮食可持续发展的问题,根据粮食发展在国民经济中的地位与作用,系统分析了国内外粮食发展现状与存在的突出问题,对国内外粮食的发展进行完整与深刻的总结,并采取立体与动态的方法,针对中国的实际情况,提出了粮食持续、稳定、健康发展的对策     

Bioeconomics of some nonhuman and human societies: new institutional economics approach

New institutional economics (NIE) has been very successful in explaining the role of institutions such as the firm, money, and contract law in facilitating production and exchange in human societies. In this paper, I will show that the NIE approach, which so far has been used by economists to analyze institutions and organizations in human society, including the ethnically homogeneous middleman groups, can also be extended to explain the high degree of cooperation and coordination of activities of honeybees, ants, and schooling fish. In addition, the paper emphasize the importance of identity in nonhuman and human societies in eliciting cooperation and in detecting cheaters or fakers. This paper thus contribute to the integration/consilience of economics and biology by providing a more unified view of aspects of the bioeconomics of nonhuman and human societies.     

火山岩气藏面临的出水问题及治理对策

随着气田开发进入稳产阶段末期,气井出水带来的开发矛盾日益突出。为此,在认识火山岩储层4种出水类型规律的基础上,开展典型气井生产动态特征分析,明确不同出水类型气井面临的治水难题。通过现场试验,探索出经济可行的治理对策,包括裂缝纵向强水窜型气井连续循环气举、裂缝纵向弱水窜气井智能化泡沫排水采气,以及孔隙纵向水锥和高含水饱和度气层出水气井储层深部解水锁3种治理措施,为火山岩气藏的持续高效开发提供技术支撑。     

重庆粮食增产途径分析

重庆粮食生产总量呈现下降趋势,产量与消费量、实际储备量与应储备量均有较大缺口,同时又面临耕地面积减少的困境;因此,提高粮食单产是重庆实现粮食增产的最佳途径.通过主成分分析,各种生产要素的投入和抗灾能力的大小是影响重庆粮食单产的主要因素.     

生产性服务业的质与量对制造业的溢出效应研究—来自OECD国家的随机前沿方法的分析

本文用随机前沿生产函数方法对ＯＥＣＤ国家１９８９～２００８年间面板数据分析,得到生产性服务的质量因素可以显著解释无效率项,而数量因素则不能,且生产性服务对制造业产出增长的贡献度比科布—道格拉斯生产函数所估计的值高１２％ ～１３％。得出结论为：生产性服务对制造业的溢出效应由技术、知识密集度代表的质量因素和劳动占比代表的数量因素共同影响。故产业政策的制定需促进生产性服务质与量共同发展。     

中国黄金市场的基本框架及快速发展

中国黄金市场是一个新生的市场,2002年建立,2003年正式运营,在短短6年的时间内,从无到有、从小到大,已经成为一个集套期保值、投资、避险等金融功能为一体的、现代化的市场体系。2008年,中国黄金市场日均交易量名列全球第五位,成为世界最重要的黄金市场之一。黄金市场是金融市场的重要组成部分,金融市场的完整和稳定是货币政策顺利运行的基础。为了保证金融市场的健康发展和货币政策的有效性,近年来,中国人民银行为推动中国黄金市场发展做了大量工作。本文试分析中国黄金市场的基本框架、发展情况,以及未来发展方向。     

Liquidating large security positions strategically: a pragmatic and empirical approach

This article investigates static liquidation strategies for large security positions in illiquid markets. Under the assumption that the liquidation horizon is given exogenously, a discretionary liquidity trader solves for the optimal sales trajectory so as to maximize an objective function that considers the expected liquidation revenues and their standard deviation. Although existing literature tends to focus on theoretical aspects with the intention of deriving closed-form solutions for special types of market impact functions, this article considers a framework that is able to capture important empirical phenomena in the stock market, such as the intraday U-shaped pattern of price impact and the resiliency of the order book. The new model is very flexible since it allows for liquidation intervals of varying length and foregoes the assumption of constant speed of trading. Examples with real-world order book data demonstrate how the setup can be implemented numerically and provide deeper insight into relevant properties of the model.