碳酸二甲酯的生产技术与市场分析

介绍了碳酸二甲酯的生产工艺、国内外生产和消费情况，并对我国碳酸二甲酯今后的发展提出了建议。     

2001-2002年山东省农药工业回顾

本文在广泛调查与深入分析的基础上 ,对山东省近两年的农药生产、科研、销售和应用情况进行了综述。为企业及有关部门提供了详实可靠的资料。     

预防液化石油气储罐应力腐蚀的初探

液化石油气储罐在工业和人民生活中有着广泛的应用,探讨液化石油气中所含H2S腐蚀介质对储罐的应力腐蚀及预防措施显得非常重要。     

左宗棠开发西北的思想和实践

晚清重臣左宗棠在经略西北期间，提出了一系列开发、建设西北的思想。他在因地制宜兴修水利，植树造林，农牧并举，发展少数民族地区经济和文化教育，推广近代工业和商业贸易等方面进行了积极实践。他的许多宝贵经验对我们今天的西部大开发仍具有启示作用。     

多道系统中进程同步检测的讨论

多道程序设计中，进程之间出现同步问题可通过信号灯的不同设置来解决，即用P信号灯和V信号灯的对应关系来检测其正确与否。     

工程力学教学与学生能力的培养

根据工程力学课程的特点，从力学的基本概念、教学方法和教学模式上对工程力学的教学体系进行了分析，以充分调动学生的学习积极性，进一步提高学生的逻辑思维能力和综合解决问题能力，增强学生的创新意识和创新能力。     

烧结模糊控制系统的设计与实现

设计了一个烧结模糊控制系统，进而构建了一个基于模糊控制的自适应脉宽控制器，对煤气阀、换向阀开关时间进行控制；利用模糊控制器的模糊推理能力来实现煤气阀门开度在线调整，以达到优化控制的目的。运行结果表明，这种控制器与常规比值控制器相比可以取得较好的控制效果。     

煤矿安全生产与经济发展

现代安全经济学对安全的重要性有一个很好比喻，即“三角形理论”：经济为两条边，安全是一条底边，没有底边的支撑，形成不了这个三角形。经济发展再快，没有安全就构不成稳定的三角形。可见，安全不仅是人类生存的需要，而且是经济发展的前提。一是安全生产保护生产力。生产力3大要素中，人是最具决定性的因素。人类自有生产活动，便存在事故隐患。安全生产的本质是不断消除隐患、遏制事故，保护劳动者的生命安全健康，所以，安全生产始终是保护生产力的一项不可缺少的工作。二是安全生产发展生产力。生产是一种复杂的物质转换活动，活动过程中会遇到各类事故隐患。安全生产通过排治隐患遏制事故，用尽量少的劳动消耗和物质消耗，生产出更多符合社会需要的产品，来促进生产力的发展。     

A theoretical framework to evaluate different margin‐setting methodologies

The margin system is the first line of defense against the default risk of a clearinghouse. From the perspectives of a clearinghouse, the utmost concern is to have a prudential system to control the default exposure. Once the level of prudentiality is set, the next concern will be the opportunity cost of the investors, because high opportunity cost discourages people from hedging futures, and thus defeats the function of a futures market. In this article, we first develop different measures of prudentiality and opportunity cost. We then formulate a statistical framework to evaluate different margin‐setting methodologies, all of which strike a balance between prudentiality and opportunity cost. Three margin‐setting methodologies, namely, (1) using simple moving averages; (2) using exponentially weighted moving averages; (3) using a GARCH approach, are applied to the Hang Seng Index futures. Keeping the same prudentiality level, it is shown that the one using a GARCH approach by and large gives the lowest average overcharge. © 2004 Wiley Periodicals, Inc. Jrl Fut Mark 24:117–145, 2004     

The index futures markets: Is screen trading more efficient?

This article uses a nonparametric test based on the arc‐sine law (see, e.g., Feller, 1965 ), which involves comparing the theoretical distribution implied by an intraday random walk with the empirical frequency distribution of the daily high/low times, in order to address the question of whether the abandonment of pit trading has been associated with greater market efficiency. If market inefficiencies result from flaws in the market microstructure of pit trading, they ought to have been eliminated by the introduction of screen trading. If, on the other hand, the inefficiencies are a reflection of investor psychology, they are likely to have survived, unaffected by the changeover. We focus here on four cases. Both the FTSE‐100 and CAC‐40 index futures contracts were originally traded by open outcry and have moved over to electronic trading in recent years, so that we are able to compare pricing behavior before and after the changeover. The equivalent contracts in Germany and Korea, on the other hand, have been traded electronically ever since their inception. Our results overwhelmingly reject the random‐walk hypothesis both for open‐outcry and electronic‐trading data sets, suggesting there has been no increase in efficiency as a result of the introduction of screen trading. One possible explanation consistent with our results would be that the index futures market is characterized by intraday overreaction. © 2004 Wiley Periodicals, Inc. Jrl Fut Mark 24:337–357, 2004