MIKEII 软件系统在穆棱河流域面源污染估算中的应用

穆棱河流域面源污染入河量调查和估算采用了MIKEII软件系统，根据水质、水量实测数据，在参数率定和模型验证的基础上．对穆棱河部分河段的水质进行模拟，拟合出面源入河量和年内分布。经验证计算结果较其他方法更合理可靠。     

修井机多桥间转向传动机构的设计

对于大型修井机采用的重型底盘,多桥转向系统是底盘开发中的关键技术之一。在分析目前修井机采用的转向传动结构(方案1)存在问题的基础上,参照军用车底盘的应用案例又提出了2种方案,经对比分析,确定了最佳的传动机构新方案,并根据多桥转向理论和四连杆机构的几何关系对该机构进行了参数确定。通过实际应用,证明该转向传动布置方案具有传动误差小、不产生附加转向、现场调节安装方便、易于组织生产等特点。     

宣钢水计量检测系统建设实践

介绍了宣钢水计量检测系统的建设和使用情况.     

八钢高炉无料钟炉顶的装料制度

以八钢高炉炼铁实践为依据，系统研究和分析了八钢2号和3号高炉炉顶设备装料制度对高炉冶炼的影响。认为高炉操作制度是当前高炉炼铁的主要技术之一，也是影响高炉焦比主要技术经济指标的重要因素。在原燃料和装备水平一定的条件下，合理的操作制度对高炉的技术经济指标起到决定性的作用。     

Flood frequency and routing processes at a confluence of the middle Yellow River in China

Floods cause environmental hazards and influence on socio‐economic activities. In this study, we evaluated the historic flood frequency at a confluence in the middle Yellow River, China. A non‐parametric, multivariate, empirical, orthogonal function matrix model, which consists of time correlation coefficients of flood discharge at different gauge stations and flood events was used for the analysis of flood frequency. The model addresses the characteristics of confluent floods such as frequency and the probability in multiple tributary rivers. Flood frequency analysis is often coupled with studies of hydrological routing processes that reduce the flood capacity of the rivers. Flood routing to the confluence were simulated using kinematic wave theory. Results of this flood frequency analysis showed that flooding frequency has intensified in the past 500 years, especially during the 19th century. Flooding in streams above the confluence was more frequent than in streams below the confluence. Over the last 2000 years, concurrent flooding in multiple tributary rivers accounted for 67.5% of the total flooding in the middle Yellow River. Simulation of flood routing processes shows that the decreased flooding capacity and elevated river bed of the shrunken main channel leads to an increased flood wave propagation time (24–52.3 h) in the study area after 1995. The model indicates that human activities, such as constructions of the Sanmenxia Dam, have changed flood routing boundary conditions and have contributed to the increased flood frequency at the confluence. Copyright © 2007 John Wiley & Sons, Ltd.     

Diffusion Coefficient of a Binary Liquid System

A generalized diffusion coefficient correlation for a binary system of liquids has been developed to represent the data for a wide range of temperatures. Detailed analysis shows that the proposed correlation fits the experimental measurements of diffusivity with the corresponding calculated values with an acceptable percentage error.     

坡沟系统侵蚀产沙及其耦合关系研究

利用变坡度坡沟系统模型和人工模拟降雨试验,定量研究了不同降雨强度下的坡沟系统产流产沙过程,揭示了坡面沟道侵蚀产沙耦合特征。结果表明:坡沟系统累积径流量和累积产沙量与降雨时间呈显著的幂函数关系,随着降雨时间的增大而增大。梁峁坡面来水径流量与沟坡净侵蚀量之间呈幂函数关系,梁峁坡面来水含沙量与沟坡净侵蚀量之间呈反线性相关。从水力学角度对坡沟系统单位水流功率与单宽输沙率的关系进行了分析,得出试验条件下的临界单位水流功率值为0.0043m/s,输沙率随单位水流功率的增大而增大。     

Experimental investigations of the effect of new passive safety systems on the temperature state of fuel elements

Results of experiments conducted on a large-scale integral PSB-VVéR bench and directed toward investigation of the performance of new passive safety systems for nuclear plants with a water-cooled power reactor, an additional system for passive flooding of the active zone, and a system for the passive removal of heat from steam generators are presented. __________ Translated from élektricheskie Stantsii, No. 9, September 2007, pp. 7–10.     

牙轮钻头压力补偿系统的发展

钻头轴承的寿命不仅取决于轴承材质，更取决于工作环境。密封圈的作用是将泥浆隔离在轴承腔之外，使轴承能工作在一个良好环境中。轴承失效的主要原因是密封圈先期失效，密封圈失效除其自身质量外，主要与密封圈两侧的压差有关，过大的压差是造成密封圈失效的主要原因。介绍了减小压差的压力补偿系统结构的发展。     

关于河流健康内涵与评价方法的综合评述

在可持续发展观念的推动下，河流健康问题引起各界广泛的重视。本文对河流健康的概念与内涵进行了剖析，分析了河流健康与河流生态系统健康的异同，提出了河流健康应包括三方面的内涵：河流自身结构功能完备，能发挥其正常的生态环境效益，并满足人类社会发展的合理需求。系统地总结了河流健康评价方法、评价标准、评价指标及评价模型，指出了评价的主体应当是河流系统，评价的河流不同，评价指标的选取和权重的确定也随之不同，依其具体特征而定。为我国河流健康评价的发展提供了一定的参考价值。