基于TOP-DOWN设计方法学的机车三维产品设计规范的研究

通过对信息化技术的研究,从分析大连机车车辆有限公司产品设计现状入手,针对机车行业的特点,提出了建立基于TOP-DOWN设计方法学的产品设计规范.通过设计规范的推广,使设计师可以实时地按照设计要求修改产品的结构,尽快完成新产品设计及现有产品的改型设计,同时实现设计师与工艺师之间的协同工作.     

计算机辅助工程技术在摩托车领域中的应用

本文论述了计算机辅助工程技术在摩托车设计及制造中的重要意义及其在我国摩托车领域中的应用状况。同时分析了CAD/CAE/CAPP/CAM/PDM/CIMS技术在今后的发展趋势     

基于Web的水电站大坝巡检系统设计与开发

针对目前水电站大坝巡检系统存在的问题,对巡检对象作了详细剖析后进行了科学、合理的划分,并提出了可扩展的数据库构建模型,开发了基于Web的水电站大坝巡检系统.实践表明,该系统可有效提高工作效率.     

基于MotoTron平台的发动机ECU快速原型开发

介绍了MotoTron快速原型开发平台的组成及特性,针对汽车发动机控制系统复杂的开发过程,在Matlab/Simulink环境下以图形化的语言和基于体系结构的软件构架,完成了系统建模、代码生成、ECU刷写、标定工作,实现了目标发动机的主要的控制性能。     

Growth of Ni/Mo/Cu on carbon fiber paper: An efficient electrocatalyst for hydrogen evolution reaction

The exploration of efficient catalysts toward hydrogen evolution reaction (HER) is still an urgent task. In this paper, Ni/Mo/Cu/C and Ni/Mo/C electrode were obtained by conventional pulse voltammetry, which acted as cathode in microbial electrolysis cells (MECs). The prepared samples are analyzed using SEM, XRD, XPS and electrochemical analysis techniques. Results indicated that the Ni/Mo/Cu coating has a rough and globular structure and presents high current density, a lower Tafel slope of 23.9 mV/dec than 30 mV/dec of Pt, which exceeds the electrochemical activity of Pt electrode. Its remarkably enhanced electrocatalytic activity is attributed to the high surface area, high conductivity as well as synergistic interaction among Ni, Mo and Cu.     

Tritium absorption/desorption in ITER-like tungsten particles

Tritium retention in plasma facing materials such as tungsten is a major concern for future fusion reactors. During ITER operating mode, the reactor could generate tritiated tungsten dust-like particles which need to be characterized in terms of amount of trapped tritium, tritium source and radiotoxicity. This study is focused on the preparation and characterization of tungsten particles and on a comparative analysis of tritium absorption/desorption kinetics in these particles and in massive samples. An original gas phase thermal charging procedure was used successfully for tritium incorporation in tungsten powders and massive samples. Much larger tritium amounts are incorporated in W particles than in massive samples indicating important surface effects on tritium absorption, desorption and trapping in W. Tritium desorption from particles occurred at different temperatures related with different interactions on the particles surface and in the bulk; the tritium behavior in massive samples was also shown to depend on the metal microstructure. According to these experimental results tritium absorption/desorption in W particles may have important implications on tritium management in ITER reactor.     

钱塘江风暴潮预报系统研制

基于C/S与B/S相结合的架构研制了钱塘江风暴潮预报系统,以二维天文潮、风暴潮耦合实时预报模型为核心,通过台风参数输入可迅速预报钱塘江河口台风暴潮的潮位过程、最高潮位及其潮位时刻等特征值.多次台风运行验证结果表明,该系统具有风暴潮预报、信息查询、方案比较等功能,且运行稳定、操作方便快捷、预报精度较高,可供借鉴.     

Beneficial effect of carbon–PVA colloid additives for lead–acid batteries

Based on the previous success of adding ultra-fine carbon–PVA (polyvinyl alcohol) colloid solution to restore performance of weak batteries, a large scale test programme of practical batteries including those used in forklift, golf cart, taxi cab, truck and bus applications from 150 companies was carried out. More than 95% of the tested batteries exhibited excellent recovery in performance parameters including the specific gravity (S.G.), voltage and operation time (Ah capacity). The work reported here includes basic research studies to understand better the beneficial action of the carbon–PVA colloid additive.     

Development of a hybrid battery system for an implantable biomedical device, especially a defibrillator/cardioverter (ICD)

An implantable defibrillator battery has to provide pulse power capabilities as well as high energy density. Low self-discharge rates are mandatory and a way to check the remaining available capacity is necessary. These requirements are accomplished by a system consisting of a lithium/manganese dioxide 6 V battery, plus a lithium/iodine-cell. The use of a high rate 6 V double-cell design in combination with a high energy density cell reduces the total volume required by the power source within an implantable defibrillator. The design features and performance data of the hybrid system are described.     

Testing of a sodium/nickel chloride (ZEBRA) battery for electric propulsion of ships and vehicles

One of the promising future batteries for electric propulsion of vehicles and ships is the sodium/nickel chloride or ZEBRA (Zero Emission Battery Research Activities) battery. Despite some disadvantages with respect to the high temperature, the advantages with respect to specific energy and energy density are such that, especially in applications where the battery is used on a more or less continuous basis (e.g., in delivery vans and taxies) it is an interesting candidate battery. Another interesting application is on board of ships, like submarines or future electrical surface ships with electric propulsion. In 1995 a 2 year feasibility study, including experimental testing of a 10 kW h battery, was completed. This investigated the naval applicability of the sodium/sulphur battery, which is also a high temperature battery. Here the limited, experimentally proven, life-time of the batteries of about 1.5 years and this made naval application almost impossible. A paper about this study was presented at the 19th International Power Sources Symposium held at Brighton, England, in April 1995 [R.A.A. Schillemans, C.E. Kluiters, Sodium/sulphur batteries for naval applications, in: A. Attewell, T. Keily (Eds.), Power Sources 15, International Power Sources Symposium Committee, Crowborough UK, 1995. p. 421.]. Because of the more or less comparable specifications on specific energy and the more promising results of the life-time and field tests with sodium/nickel chloride batteries, a ZEBRA battery from AEG Anglo Batteries has been tested for naval applications. This was done by simulating the charge and discharge as it occurs in practice for the applications investigated. With respect to the electrical ship application (investigated for the Royal Netherlands Navy) the power versus time taken from the battery was simulated as well as the charge procedures. The same can be done for the vehicle application: in this case typical drive cycles for a van or taxi are translated to power versus time taken from the battery. The results of the tests for application of the battery in naval ships are very promising.     

气缸-活塞组材料、公差以及表面强化工艺的匹配(一)

气缸 -活塞组使用寿命不长的问题 ,从摩擦学的角度出发 ,较详细地介绍了这组摩擦副实现材料的选配、形位公差及表面强化匹配要求的具体做法和基本数据 ,以供有关技术人员参考     

Characteristics of indium-free GZO/Ag/GZO and AZO/Ag/AZO multilayer electrode grown by dual target DC sputtering at room temperature for low-cost organic photovoltaics

We compared the electrical, optical, structural and surface properties of indium-free Ga-doped ZnO (GZO)/Ag/GZO and Al-doped ZnO (AZO)/Ag/AZO multilayer electrodes deposited by dual target direct current sputtering at room temperature for low-cost organic photovoltaics. It was shown that the electrical and optical properties of the GZO/Ag/GZO and AZO/Ag/AZO multilayer electrodes could be improved by the insertion of an Ag layer with optimized thickness between oxide layers, due to its very low resistivity and surface plasmon effect. In addition, the Auger electron spectroscopy depth profile results for the GZO/Ag/GZO and AZO/Ag/AZO multilayer electrodes showed no interfacial reaction between the Ag layer and GZO or AZO layer, due to the low preparation temperature and the stability of the Ag layer. Moreover, the bulk heterojunction organic solar cell fabricated on the multilayer electrodes exhibited higher power conversion efficiency than the organic solar cells fabricated on the single GZO or AZO layer, due to much lower sheet resistance of the multilayer electrode. This indicates that indium-free GZO/Ag/GZO and AZO/Ag/AZO multilayer electrodes are a promising low-cost and low-temperature processing electrode scheme for low-cost organic photovoltaics.     

Fe2O3/Pt/CdS可见光催化乙醇水溶液脱氢的8立升级放大试验及稳定性考察

报道了在可见光照射下Fe_2O_3/Pt/CdS光催化剂上乙醇水溶液光催化产H_2的8L级放大试验及光催化剂的稳定性研究结果。实验表明:该体系经292.64h光照反应,共产氢4.082L,平均产氢速率为0.99mL/(g·h),最高产氢速率为1.25mL/(g·h),光照292.64h后,催化活性仍维持在一个较为平稳的水平上,产氢速率比平均产氢速率仅下降12%。经计算,本试验中光化学转换效率高达8.2%。     

用PDCA方式控制CAD/CAPP/PDM信息化项目的实施

文章主要介绍了如何用PDCA方式对CAD/CAPP/PDM信息化项目的实施进行有效控制与管理,从而提高企业的新产品开发水平和图档管理水平.     

多元醇二元体系固－固相变贮热的研究

用ＤＳＣ法研究季戊四醇－新戊二醇（ＰＥ－ＮＰＧ），三羟甲基乙烷－新戊二醇（ＰＧ－ＮＰＧ），季戊四醇－２－氨基２－甲基１，３丙二醇（ＰＥ－ＡＭＰ），三羟甲基乙烷－２－氨基２－甲基１，３丙二醇（ＰＧ－ＡＭＰ）和三羟甲基氨基甲烷－新戊二醇（ＴＡＭ－ＮＰＧ）五个多元醇二元体系的固一固相变。这些二元固体溶液的转变温度和转变热与其组成有依赖关系。研究结果可以指导选择贮热材料的组成。     

New developments in the Electric Fuel Ltd. zinc/air system

Electric Fuel Ltd. is engaged in the design, development and commercialization of its proprietary zinc/air battery technology for electric vehicles, consumer electronic products and defence applications. To meet the challenging requirements for propelling an all-electric bus, the Vehicle Division sought a unique solution: an all electric battery–battery hybrid propulsion system. The high energy zinc/air battery is coupled with a high-power auxiliary battery. The combined system offers zero emission, high power and long range in an economically viable package. The consumer battery group has developed a high power primary zinc/air cell aimed at cellular phone users, offering extended use, convenience and low cost.     

PDM构架下的船用柴油机CAD/CAE/CAPP集成技术研究

CAD/CAE/CAP与PDM系统的集成在船用柴油机研发和制造过程中非常重要。在现有柴油机设计、制造、试验研发条件的基础上,重点开展了PDM构架下的CAD/CAE/CAPP集成技术研究。     

单缸试验台微机测控软件设计

本文主要从应用数学的角度介绍微机测控软件的设计方法。这种方法不仅适用于单缸柴油机试验台,也适用于多缸柴油机试验台、柴油机性能试验台和柴油机出厂试验台。     

Sulfur/alumina/polypyrrole ternary hybrid material as cathode for lithium-sulfur batteries

Recently, lithium-sulfur batteries (LSBs) have received extensive attention due to its high energy density of 2600 Wh kg^?1. At the same time, sulfur is earth-abundant, economical and non-poisonous. Nevertheless, the poor electrochemical performance restricts its commercial application, including the inferior cycling stability caused by the significant dissolution of lithium polysulfides and the low specific capacity because of the poor electrical conductivity of sulfur. In this work, we adopt a simple and amicable process to prepare sulfur/alumina/polypyrrole (S/Al₂O₃/PPy) ternary hybrid material to overcome these defects. In this strategy, each composition of the ternary hybrid material plays an essential role in cathode: alumina and PPy can provide strong adsorption for the dissolved intermediate polysulfides. Meanwhile, PPy also works as a conductive and flexible additive to expedite electron transport, and is coated on the surface of the as-prepared SAl₂O₃ composite by in situ chemical polymerization. The sulfur is encapsulated uniformly and perfectively by the two components, which is confirmed by field emission scanning electron microscope. The ternary hybrid material manifests good electrochemical performance as expected, and displays high initial discharge capacity of 1088 mA h g^?1 and a discharge capacity of 730 mA h g^?1 after 100 cycles at a current density of 200 mA g^?1. Besides, S/Al₂O₃/PPy also shows good rate capability. The synergy between alumina and PPy is the decisive factor, which gives rise to good electrochemical performance of cathode for high-performance LSBs.     

An environmental aircraft battery (EAB)

The Battery Branch of the U.S. Air Force Research Laboratory began the development of an environmental aircraft battery (EAB) to replace existing nickel/cadmium (Ni–Cd) and sealed lead-/acid (SLA) batteries to minimize or eliminate use of environmentally hazardous battery materials by the USAF. A three-phase development contract was awarded in 1996 to replace the cadmium in Ni–Cd batteries with a metal hydride (MH) anode. Designs, materials, space battery technology, and results on commercial and government battery programmes were evaluated in the Phase I, Feasibility Analysis. Bipolar and prismatic designs were selected for Phase II development. Materials and cell test data are presented.