Impact of Hazardous Substances Regulations on Small Firms in Delaware and New Jersey

Regulations under the 1990 Amendments to the Clean Air Act impose significant requirements on firms handling hazardous chemicals. The nature of the regulations would suggest that small firms, because of limited resources and other structural limitations, would experience more difficulty complying with the regulations than large firms. To understand the difficulties imposed by the regulations on small firms, we interviewed ten small firms in Delaware and New Jersey, states with existing hazardous regulations similar to those being considered by the U.S. Environmental Protection Agency, and evaluated their responses to state regulations. The impacts of the environmental regulations on the firms and on the risk levels of their businesses are discussed. Propositions for research into small firms compliance are developed. Possible means for reducing the regulatory burden on small firms while enhancing regulatory effectiveness are suggested.     

我国化学修饰电极研究概况

评述了我国化学修饰电极的研究状况及其在电催化、富集分离、化学传感器等方面的应用，展望了化学修饰电极用于分析化学的前景。     

构建天津渤海化学工业园区的战略分析与对策

天津渤海化工集团公司在滨海新区设立天津渤海化学工业园区有五大优势。在充分借鉴国内外化工园区成熟经验的同时,特别建议天津渤海化工集团更多地考虑滨海新区同时具有盐、碱、石油、天然气四大类石化资源,一定要以产业链来引导化工园区的建设,走上下游产品一体化的集聚式发展道路,树立先进的环保理念,实现经济发展与环境保护的双赢。     

Serial dependence and regression of Poisson INARMA models

Time series of counts occur in many fields of practice, with the Poisson distribution as a popular choice for the marginal process distribution. A great variety of serial dependence structures of stationary count processes can be modelled by the INARMA family. In this article, we propose a new approach to the INMA(q) family in general, including previously known results as special cases. In the particular case of Poisson marginals, we will derive new results concerning regression properties and the serial dependence structure of INAR(1) and INMA(q) models. Finally, we present explicit expressions for the distribution of jumps in such processes.     

蜘蛛丝的结构与力学性能

本文主要介绍了蜘蛛丝的形成和力学性能特征，分析了其结构与力学性能间的关系。     

糖酵解反应模型双曲型反应-扩散方程的稳定性和化学振荡

研究了糖酵解反应模型（修正Ｓｅｌｋｏｖ模型）双曲型反应－扩散方程的稳定性和化学振荡．与抛物型方程的结果比较表明，抛物型系统是双曲型系统当反应－扩散数增至无穷大时的特殊情况；双曲型系统不存在波速可能趋于无穷大的问题；二者的稳定性区域存在很大区别；双曲型系统更适合于用来研究糖酵解反应中的化学振荡．     

圆锥曲线的光(声)学性质

本文以微分方程为主要工具揭示了圆锥曲线的光(声)学性质。     

对《文物保护法》有关民间收藏文物诸条款的若干思考

2002年10月28日颁布实施的《文物保护法》将原法“私人收藏文物”更名为“民间收藏文物”，并由原来的3条增加到10条。新《文物保护法》对民间收藏文物诸条款的规定，一方面能够适应社会主义市场经济体制建立后所面临的新情况，另一方面在管理制度和政策上有利于实行适度开放的政策，从而达到规范市场，使民间收藏文物有序流通的目的。     

化学传感器的研究进展

化学传感器是当代信息产业的重要组成部分,其发展迅速,已在人类现代生活中发挥了重要的作用。本文介绍了化学传感器的基本概念,工作原理和分类,在此基础上着重总结了相关最新研究进展,并对化学传感器的发展做出了展望。     

论焓的物理意义

尽管焓在自然科学、工程热物理和热能工程中是使用十分广泛的物理参量,但其物理意义却是不够清楚的。本文首先评价了已有的一些关于焓的物理意义的论点,然后论述并发挥了作者以前论述过的焓中的pv是在压力场为定常时,流体微团在其迹线上的压力势能的观点。为此,需涉及到体系的势能与外力场对体系作功的关系,以及流体微元体在流场中运动时,流场对此微元体的作功关系的定量概念。通过以上论述,以期对探讨焓的物理意义有所帮助。