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．     

锡矿山重复水利用的措施及效果

本介绍了锡矿山前闪星锑业有限责任公司如何加强对关键耗水工序的管理及提高重复水利用率的措施，并对所取得的效果进行了阐述，可供用水大户如何节水以借鉴。     

油气资源丰度预测的人工神经网络方法——以济阳坳陷为例

通过相关分析,筛选出济阳坳陷控制成藏体系资源丰度的主要地质参数,把成藏体系的资源丰度及其主控地质参数作为神经网络的训练样本,建立了具有预测功能的神经网络结构.与多元线性和多元非线性回归模型预测结果的比较表明,神经网络模型在预测精度上要远高于2种回归预测模型.     

三峡-葛洲坝梯级电站水能优化利用效益分析

三峡——葛洲坝梯级电站是我国的巨型水电站，控制水量接近长江总水量的一半，电站的水能优化利用对充分利用长江流域水资源、提高电站发电效益至关重要。根据长江上游流域来水特性及梯级枢纽的运行特点．对梯级电站在三峡工程围堰发电期的水能优化利用途径、取得的发电效益及初期运行期梯级电站水能优化利用的潜力进行了系统分析。有利于提高电站的发电效益。     

低贫铁矿熔融还原炼铁的熔渣用于微晶玻璃制备

以河北司家营铁矿的低贫难选铁矿石为主要原料,研究了采用熔融还原法炼铁和浇铸工艺制备微晶玻璃的可行性,获得了可用于炼钢的生铁原料和建筑装饰用微晶玻璃.利用正交试验设计方法,探讨了不同原料配比组成条件下渣铁分离和熔渣晶化的效果,确定了可用于工业试验的最佳原料配比:铁矿石62%(质量分数,下同),氧化铝粉5%,生石灰15%,萤石3.3%,纯碱8.4%,焦炭6.2%.通过光学显微分析、X射线衍射分析、物理化学性能测试等手段确定了微晶玻璃的物相组成及性能特征.结果表明:在最佳条件下制备的微晶玻璃由硅灰石晶体和玻璃相组成,抗压强度为827MPa,Mohs硬度为6,体积密度2.69 g/cm3,吸水率为0.016%,耐酸性0.08%,耐碱性0.05%.     

内蒙某铅锌矿选矿工艺研究

该矿是铜、铅、锌等多种金属可供综合利用的多金属矿床。铜、铅分离的工艺流程研究是十分重要的。也是设计中的重点和难点。     

旱地农业降水高效利用技术应用研究

旱地农业建设必须借助科技进步，提高天然降水的有效利用，具体应围绕提高降水利用率和水分利用效率，在积极应用传统旱地农业技术的基础上，加强高新技术和常规技术相结合，重点推广雨水集蓄利用技术。     

Multi-Reservoir System Optimization using Chlorophyll-<Emphasis Type="Italic">a</Emphasis> Trophic Indexes

The problem of managing water scarcity by resorting to complex interconnected multi-source water systems needs to utilize management optimization techniques analyzing aspects of water quantity and quality in a common strategy. In the southern regions of Mediterranean Europe, the greater part of water resources for supply systems are derived from artificial reservoirs and water systems can become quite complex since they interconnect several sources and demand centers, as indeed occurs in the Region of Sardinia (Italy). A simplified approach to the requirement to insert water quality aspects in the mathematical optimization model can be achieved by examining the trophic conditions of reservoirs. Trophic State Indexes (TSI) based on Carlson’s (1977) make it possible to insert quality constraints in the water management optimization model also considering complex multi-reservoir and multi-user systems. Model formalization and implementation by the optimization toolkit WARGI (Water Resource system optimization aided by Graphical Interface) (Sechi and Zuddas 2000; Manca et al. 2004; Salis et al. 2005) is illustrated in this paper. The usefulness of a mixed quantity–quality optimization approach has been confirmed by WARGI application to a real multi-reservoir water resources system in southern Sardinia. The optimization model remains computationally efficient dealing with this complex multi-reservoir system and the obtained results can be seen as a reference target in a subsequent simulation phase.     

Fixed collision rate back-off scheme for collision resolution in wireless networks

This investigation proposes a fixed collision rate (FCR) back-off algorithm for wireless networks. The proposed scheme takes advantage of the central unit (CU) in a wireless network to broadcast a common back-off window size to all the users, significantly alleviating the unfairness of bandwidth utilization in conventional binary exponential back-off (BEB) algorithms. It is shown that, when maximum throughput is achieved, collision rate is almost a constant for any traffic load. In the operation of the FCR, the CU dynamically adjusts the back-off window size to keep the collision rate at a constant level for maximum throughput. Simulation results demonstrate that the unfairness of bandwidth utilization in the BEB is significantly lessened and the throughput can be maintained at e^-1≈0.368 when the number of users approaches infinity. The capture effect even further improves system performance.     

水电建设工程档案信息资源的开发与利用

本文阐述工程档案信息资源开发与利用的现状、存在问题及实际效果，进一步加强工程档案编研工作，更好为水电工程建设和管理服务。