铜精矿预干燥烟气处理系统的改造和生产实践

简述了贵溪冶炼厂铜精矿预干燥烟气处理系统改造前的基本情况,分析了改造前预干燥烟气处理系统存在的问题和改造目标,详细论述了改造前和改造后的预干燥烟气处理的工艺流程,介绍了改造前和改造后的运行数据,并对本次改造的技术特点进行了总结。     

高炉鼓风机风量风压控制系统改造项目的分析与研究

介绍了高炉鼓风机风量风压控制系统改造项目,包括改造目的、改造方案、改造内容、改造的实施过程.分析了改造实施过程中存在的问题,项目技术重点、难点、创新点、技术目标完成情况,并对改造后的经济效益分析及推广应用前景进行了探讨.     

城中村改造中的博弈关系分析与应对

介绍了城中村现象概况,运用博弈理论分析了城中村改造过程中各改造主体的博弈关系,揭示了改造过程中的主要利益冲突,并在此基础上提出各改造主体的合理利益,最后以保定市城中村改造为基础,提出了城中村改造的应对策略.     

基于数字化技术的马钢电炉变电所应用实践

通过马钢电炉变电所数字化改造的实践,找到冶金系统变电所数字化改造的途径和方法,总结了冶金系统变电所数字化改造的技术特点,为冶金系统变电所数字化改造提出了可行的改造途径。     

高压变频器在炼轧厂脱硫除尘风机上的应用

通过对酒钢宏兴炼轧厂脱硫除尘风机的高压变频节电改造的介绍,详细叙述了改造的目的、技术方案、改造过程。分析了改造效果及效益评价。最后阐明节能改造的意义。     

太钢峨口球团厂2号竖炉大修技术改造

介绍了峨口球团厂２号竖炉的大修改造,包括：干燥床改造、导风墙和大水梁改造、齿辊卸料系统改造和液压站改造等。由此,大幅度提高了竖炉利用系数和竖炉作业率。     

宣钢矩形坯连铸机高效化改造

传统连铸机实现高拉速、高质量、高作业率需要实施高效化改造。就宣钢二台矩形坯连铸机实施高效化改造存在的困难进行了论证,介绍了高效化改造应达到的目标,提出了实施高效化的基本思路和技术保证及高效化改造的具体内容,最后计算了与高效化改造有关的技术参数,并把改造前后的生产指标进行了对比分析和经济效益分析。实践证明,高效化改造能给钢厂带来巨大的经济效益,传统连铸机实施高效化改造是钢厂今后节能降耗,结构优化的主要途径之一。     

采用合同能源管理(EMC)模式实施节能改造的实践

简述了合同能源管理模式的概念和特点,以柳钢实施的变频节能改造、水系统节能改造、照明节能改造等介绍了应用合同能源管理模式实施节能改造的效果,并对采用该模式实施节能改造提出建议。     

2号高炉干法除尘系统集中卸灰改造

针对炼铁厂2号高炉干法除尘系统加湿卸灰所带来的二次扬尘现象，提出了集中卸灰改造的方案，并对改造方案的可行性和改造费用情况作了探讨，同时阐述了改造的实施过程和改造后的操作要求。     

世界首条改造成的“酸洗—轧机”联合机组

本文介绍了世界首条改造成的“酸洗-轧机”联合机组-法国索拉克在蒙达梯尔市于齐诺尔厂联合机组的改造起因、改造实施过程、改造后的运行情况,对该机组改造前后的技术经济参数作了对此分析,介绍了该机组改造中的一些宝贵经验,可供我国冷轧企业参考。     

Reliability Analysis of Plank Decks

The objective of this study is to summarize the load and resistance criteria for highway bridge plank decks, and to estimate the reliability of plank decks designed by the AASHTO Code. Both transverse and longitudinal planks for a variety of typical stringer spacings and plank sizes are considered. Truck traffic load data are based on the model used to calibrate the 1994 AASHTO LRFD Code. However, for plank decks, wheel load rather than whole vehicle weight is most important, and these statistics are developed for this study. For wood planks, dead load and dynamic load are not significant. The limit state considered is flexural strength, and resistance statistics are presented for wood planks in terms of modulus of rupture. Special flat-wise use data are presented to account for section aspect ratio as well as edge of load application. The reliability analysis is carried out using the procedure developed for calibration of AASHTO LRFD. Reliability indices for both the AASHTO Standard and AASHTO LRFD Code are presented for plank decks. The results indicate that there are considerable differences in plank reliability indices. Causes of inconsistencies in safety are identified.     

Three-Dimensional Nonlinear Seismic Analysis of Single Piles Using Finite Element Model: Effects of Plasticity of Soil

Much of the reported research on the dynamic analysis of pile foundations assumes linear behavior of soil that may not be valid for strong excitations. In this paper, material nonlinearity of the soil caused by plasticity and work hardening is considered in the dynamic analysis of pile foundations. An advanced plasticity based soil model, HiSS, is incorporated in a finite element technique. To simulate radiation effects, proper boundary conditions are used. The model and algorithm are verified with analytical results that are available for elastic and elastoplastic soil models. Analyses are carried out for free-field response and pile head response of end-bearing single piles. Both harmonic and transient excitations are considered in the analyses. Effects of frequency of excitation and stiffness of soil are investigated. It was found that the nonlinearity of soil has significant effects on the pile response for lower and moderate frequencies of excitations (a0<0.6) while at higher frequencies its effects are not as significant.     

纳米高强度复合材料的发展现状

本文介绍了纳米高强度复合材料所用的纳米材料制备方法、纳米复合材料制备工艺和强度改善进展。目前陶瓷纳米复合材料是人们开发的热点。碳纳米管与其它材料的复合材料的开发也是热点。最后介绍了应用前景。     

Genetic activity profiles of anticancer drugs

The results from short-term tests for genetic and related effects, abstracted from the open literature for 36 anticancer drugs, are examined in this review. Data for 27 of these agents are available in the EPA/IARC Genetic Activity Profile (GAP) database. Data summaries, including data listings and activity profiles, are presented for nine anticancer drugs added to the GAP database for this analysis. Genetic toxicity data from the recent literature are included for the additional agents to provide a broader representation of the categories of drugs being evaluated. These categories, based on the chemical mode of action, are covalent and noncovalent DNA-binding drugs, topoisomerase II inhibitors, antimetabolites, mitotic spindle inhibitors, and drugs which affect endocrine function. The qualitative data for all 36 drugs are summarized in this report and findings are presented from pair-wise matching of genetic activity profiles, based on test results in common, for some chemical analogs. The significance of germ cell test results for some of these drugs and their implication in assessing risk of heritable genetic disease are discussed.     

新时期企业档案馆馆员的素质要求

信息技术时代,社会信息需求的激增和丰富的信息资源,有助于档案馆发展的积极因素.馆员是促进这两个因素有效结合,发挥档案馆信息中心的作用的关键因素.科学提升馆员素质,促进档案馆的发展至关重要.文章针对信息时代档案馆发展形势,分析新时代馆员素质的基本责任、素质要求,并结合馆员素质现状,力求得出提高馆员素质的有效途径.     

Models of helping and coping.

Draws a distinction between attribution of responsibility for a problem and attribution of responsibility for a solution. Four general helping models are derived. In the "moral" model, actors are held responsible for both problems and solutions and are believed to need only proper motivation. In the compensatory model, people are responsible only for solutions and are believed to need power. Individuals in the medical model are responsible for neither problems nor solutions and are thought to need treatment. In the enlightenment model, actors are responsible for problems but are unable or unwilling to provide solutions; they need discipline. It is maintained that each set of assumptions has characteristic consequences for the competence, status, and well-being of actors and that the wrong choice of model in a situation will undermine effective helping and coping. Competing models of responsibility in education, psychotherapy, law, and welfare are described, and research on attribution of responsibility is recommended as a way of addressing problems of both theoretical and social significance. (128 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Assessment of Time of Concentration Formulas for Overland Flow

Despite the importance of overland time of concentration on the design discharge, engineers are often bewildered by the array of formulas available in the literature without knowing the accuracy of each formula. This assessment covers nine formulas published between 1946 and 1993, which are intended for overland flow only that is subjected to uniform rain. The assessment compares the estimates from the formulas with experimental values that are derived under the same conditions for two surfaces: concrete and grass. The assessment shows that formulas that do not account for the rainfall intensity are only valid for a limited range of rainfall intensities. The formulas that account for the rainfall intensity generally show better agreement with the experimental data. Finally, the assessment gives two rankings of the formulas for the two surfaces in accordance to their accuracy as compared to the experimental data. The formula that has the best accuracy for both surfaces is the Chen and Wong formula.     

Equivalent Moment of Inertia Based on Integration of Curvature

This paper evaluates the benefits of computing deflection with an equivalent moment of inertia based on integration of curvature to account for changes in member stiffness along the span. Results are evaluated for steel and fiber-reinforced polymer reinforced (FRP-reinforced) concrete flexural members with different loading arrangements and support conditions. Closed-form solutions of integrated expressions for deflection are expressed in terms of an equivalent moment of inertia Ie′ and compared to deflection computed with an effective moment of inertia Ie based on the stiffness at the critical section. Results from this comparison are validated with measured deflections from an experimental database for FRP-reinforced concrete. Current code-related approaches are also compared to the experimental database. It is shown herein that the use of an integration-based expression for the moment of inertia can lead to improved prediction of deflection, though the use of an effective moment of inertia based on member stiffness at the critical section gives a reasonably conservative estimate of deflection in many cases. The benefits of taking account of changes in stiffness along the member span are more evident when low reinforcing ratios are used in combination with FRP reinforcement, and use of the integration-based expression Ie′ may be warranted when deflection control is critical in such cases.     

包钢焦化厂新煤气净化系统的开工及运行

介绍新煤气净化系统工艺及主要设备,分析该系统开工方案、开工步骤及开工过程中的操作要点,并论述了开工后生产运行状况、技术改造及遗留的问题.