电弧炉工作层耐材砌衬技术改造及其经济效益

阐述了根据生产实际情况,改造了宁夏恒力集团有限公司炼钢分厂18t电弧炉工作层耐材砌衬的材质及砖型,从而降低了工人的劳动强度,提高了工作效率,降低了企业生产成本,提高了经济效益。     

2号机低压缸叶片断裂原因分析及改进措施

2号机组运行中发生了多次叶片断裂事故,严重影响了设备的安全、稳定运行。对机组历次断叶片情况进行了分析与总结,得出了故障原因,结合机组大修进行了改造,取得了良好效果。     

750 kV两站两线科研项目管理

针对兰州超高压输变电公司科研项目管理模式进行了研究与分析,提出了科研项目分解的方案,通过本方案明确了基本课题,可以较为全面、系统指导科研工作的开展,增强了科研项目实施的可操作性。构建了矩阵式科研项目管理组织结构,优化配置了公司各科研资源,明确了科研项目的各主要责任主体。确立了科研项目管理流程,做到闭环控制,加强了科研项目过程管理。     

写在新财年到来时——2009，MI为你支招拼经济

自从那复杂的“次贷危机”开了头,金融海啸也跟着来了,中国GDP指数从两位数跌到个位数了,企业倒闭了,某某又被裁员了……面对这场“浩劫”,考验企业们的“抵抗力”的时候到了,而除了防守外,企业经营者们更应该主动出击。     

真空技术应用理论分析

本文介绍了真空隔热技术在电冰箱生产中的应用,具体分析了真空隔热板构造、传热及使用特点,指出了提高真空隔热板绝热性能的途径及要求,分析了真空隔热技术使用中存在的问题及解决方法,并展望了其应用前景.     

1341材料在循环水泵上的应用

对热电厂发电机的三台循环水泵的运行状况进行了分析,并用BELZONA1341材料对水泵叶轮的表面进行了处理,减少了叶轮表面与水流的阻力和涡流的产生,降低了电机的有功电流,节约了电能,并且延长设备的寿命,效果十分明显.     

紫油机微粒过滤器的研究

介绍了柴油机微粒的组成及产生的原因;阐述了柴油机微粒过滤器设计时要考虑的问题;介绍了紊流沉淀器的结构及工作原理.在此基础上设计了一个柴油机微粒催化过滤器并进行了相应的实验,达到了预期成果.     

蓄热式加热炉燃烧系统的改造

针对轧钢加热炉加热能力不足,自动化控制水平落后的情况,对加热炉进行了改造,更换了单蓄热式空气烧嘴,并对自动控制系统进行了升级改造,从而提高了加热能力和自动控制水平,降低了煤气消耗,取得了良好的经济效益。     

气门模具H13钢的形变热处理

模具钢H13制造气门顶锻模因使用寿命不高，改变了原来工艺，采用了形变热处理新工艺，节约了能源，缩短了生产周期，降低了成本，同时提高了模具使用寿命。     

两轮摩托车振动耐久试验台的设计

阐述了摩托车振动耐久试验台的设计方案。方案中描述了两轮摩托车振动耐久试验台的结构组成,详细介绍了系统的关键硬件电路,提出了车速控制策略,给出了车速的实时测量和控制流程图。实验表明,摩托车振动耐久试验台为摩托车的振动耐久检测提供了方便,高效,节能的试验平台。     

Study of contact melting inside isothermally heated vertical cylindrical capsules

Close-contact melting processes of phase change material (PCM) inside vertical cylindrical capsule are studied. PCM are heated by the capsule isothermally at the bottom and side. The theoretical formulas of the melting rate and thickness of liquid layer during the heat transfer process are obtained by analysis, which are convenient for engineering predictions. Finally, the factors that affect melting are discussed, and conclusions are drawn.     

Potential method in the theory of thermoviscoelastic mixtures

In this article, the linear theory of binary thermoviscoelastic mixtures is considered and the basic boundary value problems (BVPs) of steady vibrations are investigated. Namely, the fundamental solution of the system of equations of steady vibrations is constructed explicitly and its basic properties are established. Green’s second and third identities are obtained and the uniqueness theorems for classical solutions of the internal and external basic BVPs of steady vibrations are proved. The surface and volume potentials are constructed and their basic properties are given. The determinants of symbolic matrices are calculated explicitly. The BVPs are reduced to the always solvable singular integral equations for which Fredholm’s theorems are valid. Finally, the existence theorems for classical solutions of the internal and external BVPs of steady vibrations are proved by the potential method and the theory of singular integral equations.     

质子交换膜燃料电池系统控制与应用现状

描述了质子交换膜燃料电池(PEMFC)系统的控制及其在中低功率领域中的应用现状。首先概述了过程模型和电压预测模型，对影响电堆性能的各参数进行分析。其次，从目前运用的简单控制方法、混合动力驱动、效率优化、故障容许等方面对PEMFC系统的分析与控制结构作了说明。然后介绍了PEMFC的几种具体应用。最后结合国内外的相关研究进展，提出了一些有待进一步研究的方向。     

针对转速偏差调节和汽门快关控制的连续阀门控制的研究

常规的汽轮机控制器包括小拔动控制和汽门快关，产生两个相对独立的控制信号，本文提出了一种基于最优复合控制策略的连续转速控制器，由2组结构完全相同，参数增益不同的控制器组成，可以对转速偏差调节和汽门快关进行连续的控制，可以在整个控制过程中进行无扰动切4换，避免了常规的开关式汽门快关的缺点，这种控制器考虑了汽轮机的非线性，进行了线性化，采用了满足稳态和暂稳态的线性二次最优控制。仿真比较了所研究的复合控制器和常规的控制器在三相短中和故障后带本地负荷暂稳态的情况，结果表明，这种复合控制器有良好的控制特性。     

自然通风技术研究方法及工具

目前自然通风主要有三种研究方法:简单的理论分析法、实验法和数值模拟法。本文概括介绍了后两种方法的研究现状,并对它们进行了分析比较,提出各种方法的适用场合。在数值模拟法中还介绍了几种可用于分析自然通风系统的通风特性和热特性的常用工具软件,对各自工作原理和应用特点进行了比较,并对使用方法和应用场合提出了建议。     

二甲醚在能源行业应用前景综述

介绍了二甲醚（DME）的特点，结合我国能源结构的实际情况，详细论述了其在能源行业的应用前景，特别是替代民用LPG燃料和车用柴油燃料的应用前景，分析了基于DME为燃料相关系统的关键技术、应用前景及主要障碍。通过与柴油、LPG、天然气的物性对比，就二甲醚的推广所要解决的技术问题进行了分析，提出相关解决方案，并对二甲醚在燃料市场的应用方向进行了阐述。     

US nuclear energy policy Provision of funds for decommissioning

The five recognized methods of decommissioning nuclear power plants are reviewed, and are linked with US nuclear regulatory policy. Although over 60 US nuclear reactors have been decommissioned since 1960, none have been large-scale commercial facilities. Costs of the decommissioning alternatives are estimated, but are acknowledged to be highly tentative and uncertain. Five methods of providing funds for decommissioning and the actual practices of US electric utilities are analysed in terms of the policy issues they present. Revenue bonding and sinking fund approaches are argued to be the soundest means to recover decomissioning uncertainties surrounding decommissioning are considered.     

锅炉烟气脱硫技术进展

简要介绍了烟气脱硫技术的分类，以及几种主要的湿法、干法、半干法烟气脱硫技术的主要特点。对不同的烟气脱硫技术的优缺点也作了简单评述。同时概述了目前国内外烟气脱硫技术应用和开发进展情况，对我国烟气脱硫技术的发展提出了建议．     

A Plane Magnetothermoelastic Waves Reflection and Refraction Between Two Solid Media with External Heat Sources and Initial Stress

In this article, an estimation to illustrate the reflection and transmission of thermoelastic waves at the interface of two different thermoelastic solid half-spaces under initial stress, magnetic field, and external heat sources is made. The governing equations are considered for an isotropic and homogeneous generalized thermoelastic model under initial stress, heat sources, magnetic field, and perfect boundary condition. The reflected and transmitted waves amplitudes are obtained for the incidence of SV-waves. Approximate expressions are obtained as a special case from the present problem. The results obtained are computed numerically for the amplitude ratios under initial stresses and are displayed graphically. It appears that the effects of initial stress, magnetic field, and external heat sources are very pronounced on the propagation phenomena. If the magnetic field and heat sources are neglected, the results obtained then lead to the same results obtained by relevant authors.     

A review on ports’ readiness to facilitate international hydrogen trade

The existing literature on the hydrogen supply chains has knowledge gaps. Most studies focus on hydrogen production, storage, transport, and utilisation but neglect ports which are nexuses in the supply chains. To fill the gap, this paper focuses on ports' readiness for the upcoming hydrogen international trade. Potential hydrogen exporting and importing ports are screened. Ports' readiness for hydrogen export and import are reviewed from perspectives of infrastructure, risk management, public acceptance, regulations and standards, and education and training. The main findings are: (1) liquid hydrogen, ammonia, methanol, and LOHCs are suitable forms for hydrogen international trade; (2) twenty ports are identified that could be first movers; among them, twelve are exporting ports, and eight are importing ports; (3) ports’ readiness for hydrogen international trade is still in its infancy, and the infrastructure construction or renovation, risk management measures, establishment of regulations and standards, education and training all require further efforts.