影响有线数字电视机顶盒发展的因素

从用户需求、节目源、价格、资金、行业体制等方面论述了影响有线数字电视机顶盒发展的因素。     

水资源综合利用与管理规划初步研究

通过对水资源可持续利用规划进行的宏观、中观、微观三个层次的研究提出了管理规划的模型．利用该模型，可通过对环境经济的评价促进我国社会经济可持续发展目标的实现．本研究从加强水资源管理，重点要从水资源产权管理、水资源开发利用规划以及水资源合理配置几方面着手，提出应建立健全水资源管理的法律、政策和协调机制，加大水价改革力度，提高水价对促进水资源合理利用的经济杠杆作用，促进水资源的可持续利用．     

海洋石油开发工业污染物产生系数和排放系数研究

污染物产生系数和排放系数是工程环境影响评价的重要指标,但对于海洋石油开发工程环境影响评价来说,迄今尚无具权威性的系数可资使用。在我国近海石油开发工程污染源系统调查的基础上,对海洋石油开发行业污染物产生系数和排放系数的定义、计算方法、应用范围及应用方式进行了探讨,研究结果可为海洋石油开发工程项目环境影响评价及环境保护管理,以及行业或企业有关标准的制定提供参考。     

山西煤焦流通市场化改革建议

本文分析了山西在推进煤炭流通市场化过程中面临的机遇及现行体制弊端,提出建立更加适合市场经济的煤焦流通体制的若干建议。     

纳米超晶格热电材料的研究进展

随着热电材料制备技术和性能研究的发展，纳米超晶格热电薄膜已受到人们的关注，简要介绍了有关纳米超晶格热电材料的结构、热电机理及制作技术，并指出了存在的问题和可能的发展方向。     

贯彻《水文条例》加强水文科研工作

水文是水利工作乃至国民经济社会发展的基础性和公益性工作。环境的变化、社会的发展、新时期水利工作治水思路转变等均向水文工作提出了新的要求，也提出了许多新的水文科学技术问题。我们应该认真学习贯彻《中华人民共和国水文条例》，加强水文监测工作，加强水文资料的汇交、管理和共享．进一步推进水文现代化建设，推进水文事业的健康发展。     

成品油汽运发货系统的研究与开发

介绍成品油传统汽运发货流程.指出其中的弊端,提出采用计算机网络化管理的思路,并对计算机成品油汽运发货系统的优点和功能进行了介绍,然后详细讨论了该系统的开发过程和功能实现,最后提出改进和发展方向。     

提高曲面近似展开精度的方法与实现

通过对不可展曲面近似展开精度的研究，提出了根据曲面曲率的大小对曲面自动进行网格划分，通过对综合展开误差数据场进行数据拟合来选取最优展开基点，基于空间曲面与其展开图间近似的等距变换关系进行展开样形的误差矫正等3种方法，这几种方法的实现在不同程度上有效地减小了曲面的近似展开误差，提高了曲面的近似展开精度。     

A multicriteria approach to identify investment opportunities for the exploitation of the clean development mechanism

The aim of the present paper is to investigate the prospects for the exploitation of the Kyoto Protocol's Clean Development Mechanism (CDM) in Greece. The paper is addressing 3 questions: in which country, what kind of investment, with which economic and environmental return? The proposed approach is based on a multicriteria analysis for identifying priority countries and interesting investment opportunities in each priority country. These opportunities are then evaluated through a conventional financial analysis in order to assess their economic and environmental attractiveness. To this purpose, the IRR of a typical project in each investment category is calculated by taking into account country-specific parameters, such as baseline emission factors, load factors, costs, energy prices etc. The results reveal substantial differences in the economic and environmental return of different types of projects in different host-countries and show that for the full exploitation of the CDM a multifaceted approach to decision-making is necessary.     

New Engineered Particles from Spray Dryers: Research Needs in Spray Drying

This article reviews developments in the simulations of spray dryer behavior, including the challenges in modeling the complex flow patterns inside the equipment, which are often highly transient and three-dimensional in nature. There appears to be considerable scope for using CFD simulations for investigating methods to reduce the rates of wall deposition and of thermal degradation for particles by modifying the air flow patterns in the chamber through small changes in the air inlet geometry. Challenges include building particle drying kinetics and reaction processes, as well as agglomeration behavior, into these simulations. The numerical simulations should be valuable supplements to pilot-scale testing, enabling more extensive and accurate optimization to be carried out than hitherto possible. New understanding of reaction processes and materials science, in combination with recent knowledge of the application of CFD to these problems, may enable new engineered powder products to be developed from the one-step spray-drying process.