汽车电子牌照管理系统的设计与开发

为加强车辆管理设计了汽车电子牌照管理系统。本系统以安装Windows 2000 AdvancedServer的计算机为服务器；以安装了Windows 2000 Professional的计算机为客户端；以Microsoft SQL Server2000企业版作为开发数据库平台；以Delphi6作为前端开发工具，构建了网络开发环境，完成了汽车电子牌照管理系统的不停车收费、停车场管理、在逃车辆追踪、交通流监控、报表打印等基本功能。本系统实现了汽车牌照的有机管理，提高了交通运输效率和管理水平。     

物资企业进销存计算机管理系统的开发

介绍了一个物资企业进销存计算机管理系统的开发实例。重点从系统的流程、总体设计、主要的功能模块以及软件的开发平台入手介绍了该系统的设计思路与过程。系统选择了SQL Server2000作为开发平台，并以Visual C＋＋6．0作为开发工具。SQL Server 2000的可伸缩性、可用性和可管理性等方面相比其它数据库管理系统有了很大的改善和提高，能够满足各种类型的企业客户和独立的软件供应商构建商业应用程序的需要。这为今后软件版本升级、维护等方面提供了可靠的保证。     

离散型制造企业进销存信息管理系统的设计与实现

针对某离散制造企业的业务流程，采用C／S（Client／Server）结构模式，使用VB6．0作为前台开发工具，SQL Server2000做后台数据库，开发了企业进销存管理系统。该系统以企业管理的计划和控制职能为核心，提供了采购、库管、销售、计划等实用而丰富的管理功能，可以对企业的经营管理活动分析、预测。文章介绍了系统的建模、设计和实现过程。     

基于Web的产品信息管理(PDM)系统

通过利用XML、C＃、ASP.NET、SQL Server2000等最新的技术，研究开发基于Web的PDM系统。     

无损检测授证人员管理信息系统的设计与实现

根据航空工业无损检测人员资格认证工作的实际情况和发展要求，从有效利用信息资源和提高行业管理水平的角度阐述了建立航空无损检测授证人员管理信息系统的必要性和紧迫性；确定了系统工作目标，进行了子系统功能划分及设计；在Windows操作环境下，选择以Mi-crosoft Access2000为支持数据库、以可视化的Visual Basic6.0语言作为编程工具，成功地设计、开发了授证人员管理信息系统。     

金属材料CO_2腐蚀数据库的设计和实现

在Microsoft Win XP中文专业版环境下,使用Microsoft SQL Server 2000数据库管理系统,设计和开发了一个全中文环境下的金属材料CO2腐蚀数据库。用Origin制图工具生成存储图像,以SQL Server的二维表存储数据,采用C#编程。采用C/S三层架构完成开发。系统包括了数据编辑、检索浏览、数据维护以及图像显示等多种功能实现。     

镁合金管材热挤压模AutoCAD参数化设计系统研究与开发

利用AutoCAD为开发平台，以其内嵌的VBA为开发工具，采用ACCESS及SQL Server建立数据库及作为数据库管理工具，建立了结合数据库的镁合金挤压管材模具参数化设计系统。利用本设计系统可方便地实现设计参数的选择及输入，快速地计算和输出图纸，明显地提高设计效率。     

机械传动设计CAD系统的研制

针对高等院校机械设计教学和课程设计的需要,以Windows为平台、VB6．0为开发工具,实现了常用机械传动的单级或多级传动设计以及滑动、滚动轴承的选择计算。实践表明该系统运行正确,用户界面良好,能大大提高机械传动设计的准确性和效率,并可应用于一般工业设计领域的传动设计。     

重型车辆计算机辅助焊接工艺自动设计系统

介绍了在Visual Basic6．0集成开发环境（IDE）下,采用C／S结构,开发的重型车辆计算机辅助焊接工艺设计（WCAPP）系统。系统客户端利用VBA和OLE Automation技术,服务器端利用SQL Server 2000,实现了基于特征的焊接接头信息管理、工艺试验报告的编辑维护、工艺卡片的信息管理、焊接工艺卡和焊接工艺参数智能生成以及工艺卡批输出等主要功能。     

机械传动系统性能综合测试实验台研究与开发

基于对机械传动系统作为机器的重要组成部分,不仅应能实现预期功能,而且应具有良好性能的认识,采用模块化设计方法,研制了机械传动系统性能综合测试实验台。对实验台各部分的组成、工作原理、功能等方面进行了详细分析与阐述。该实验台为机械传动系统性能综合评价与选优提供了一种科学实用、易于操作的手段。     

Effects of Post-weld Heat Treatment on Microstructure,Mechanical Properties and the Role of Weld Reinforcement in 2219 Aluminum Alloy TIG-Welded Joints

In as-welded state, each region of 2219 aluminum alloy TIG-welded joint shows diff erent microstructure and microhardness due to the diff erent welding heat cycles and the resulting evolution of second phases. After the post-weld heat treatment, both the amount and the size of the eutectic structure or θ phases decreased. Correspondingly, both the Cu content in α-Al matrix and the microhardness increased to a similar level in each region of the joint, and the tensile strength of the entire joint was greatly improved. Post-weld heat treatment played the role of solid solution strengthening and aging strengthening. After the post-weld heat treatment, the weld performance became similar to other regions, but weld reinforcements lost their reinforcing eff ect on the weld and their existence was more of an adverse eff ect. The joint without weld reinforcements after the post-weld heat treatment had the optimal tensile properties, and the specimens randomly crack in the weld zone.     

The First Phase of the SRIF Industrialized Base in ＂West Area＂ Has Been Put into Operation

After nearly two years＇ tense construction, the first phase of industrialized base of Shenyang Research Institute of Foundry （SRIF）, located at the Tiexi Casting and Forging Industrial Park in the west of Tiexi District, has now been completed and formally put into operation.     

Thermodynamics Study on the Decomposition of Chromite with KOH

Institute of Process Engineering, Chinese Academy of Sciences, China, has proposed a method for oxidative leaching of chromite with potassium hydroxide. Understanding the mechanism of chromite decomposition, especially in the potassium hydroxide fusion, is important for the optimization of the operating parameters of the oxidative leaching process. A traditional thermodynamic method is proposed and the thermal decomposition and the reaction decomposition during the oxidative leaching of chromite with KOH and oxygen is discussed, which suggests that chromite is mainly destroyed by reactions with KOH and oxygen. Meanwhile, equilibrium of the main reactions of the above process was calculated at different temperatures and oxygen partial pressures. The stable zones of productions, namely, K2CrO4 and Fe2O3, increase with the decrease of temperature, which indicates that higher temperature is not beneficial to thermodynamic reactions. In addition, a comparison of the general alkali methods is carried out, and it is concluded that the KOH leaching process is thermodynamically superior to the conventional chromate production process.     

Influence of Heat Treatment on Damping Behaviour of the Magnesium Wrought Alloy AZ61

The effect of isochronal heat treatments for 1h on variation of damping, hardness and microstructural change of the magnesium wrought alloy AZ61 was investigated. Damping and hardness behaviour could be attributed to the evolution of precipitation process. The influence of precipitation on damping behaviour was explained in the framework of the dislocation string model of Granato and Lücke.     

Effect of Rare Earth Doping on Impedance,Modulus and Conductivity Properties of Multiferroic Composites:0.5(BiLa_xFe_(1-x)O_3)–0.5(PbTiO_3)

The Lanthanum-doped bismuth ferrite–lead titanate compositions of 0.5(Bi LaxFe1-xO3)–0.5(Pb Ti O3)(x = 0.05,0.10,0.15,0.20)(BLxF1-x-PT) were prepared by mixed oxide method.Structural characterization was performed by X-ray diffraction and shows a tetragonal structure at room temperature.The lattice parameter c/a ratio decreases with increasing of La(x = 0.05–0.20) concentration of the composites.The effect of charge carrier/ion hopping mechanism,conductivity,relaxation process and impedance parameters was studied using an impedance analyzer in a wide frequency range(102–106Hz) at different temperatures.The nature of Nyquist plot confirms the presence of bulk effects only,and non-Debye type of relaxation processes occurs in the composites.The electrical modulus exhibits an important role of the hopping mechanism in the electrical transport process of the materials.The ac conductivity and dc conductivity of the materials were studied,and the activation energy found to be 0.81,0.77,0.76 and 0.74 e V for all compositions of x = 0.05–0.20 at different temperatures(200–300 °C).     

Quantitative Analysis of the Crystallographic Orientation Relationship Between the Martensite and Austenite in Quenching–Partitioning–Tempering Steels

The orientation relationships(ORs)between the martensite and the retained austenite in low-and medium-carbon steels after quenching–partitioning–tempering process were studied in this work.The ORs in the studied steels are identified by selected-area electron diffraction(SAED)as either K–S or N–W ORs.Meanwhile,the ORs were also studied based on numerical fitting of electron backscatter diffraction data method suggested by Miyamoto.The simulated K–S and N–W ORs in the low-index directions generally do not well coincide with the experimental pole figure,which may be attributed to both the orientation spread from the ideal variant orientations and high symmetry of the low-index directions.However,the simulated results coincide well with experimental pole figures in the high-index directions{123}_(bcc).A modified method with simplicity based on Miyamoto’s work was proposed.The results indicate that the ORs determined by modified method are similar to those determined by Miyamoto’method,that is,the OR is near K–S OR for the low-carbon Q–P–T steel,and with the increase of carbon content,the OR is closer to N–W OR in medium-carbon Q–P–T steel.     

Growth Kinetics of Single Inclusion Particle in Molten Melts

On the basis of the single-particle framework, a new theory on inclusion growth in metallurgical melts is developed to study the kinetics of inclusion growth on account of reaction and collision. The studies show that the early growth of inclusion depends on reaction growth and Brawnian motion collision, and where the former is decisive, the late growth depends on turbulence collision and Stokes＇ collision, and where the former is dominant; collision growth is very quick during the smelting process, lessened in the refining process, but nearly negligible in the continuous casting process.     

Theoretical Analysis for the Motion and Temperature of Melt Droplets in Spray Degassing Process

The motion of melt droplets in spray degassing process was analyzed theoretically. The height of the treatment tank in spray degassing process could be determined by the results of theoretical calculation of motion of melt droplets. To know whether the melt droplets would solidify during spraying process, the balance temperature of melt droplets was also theoretically analyzed. Then proof experiments for theoretical results about temperature of melt droplets were carried. In comparison, the experimental results were nearly similar to the calculation results.     

Using Finite Element and Contour Method to Evaluate Residual Stress in Thick Ti-6Al-4V Alloy Welded by Electron Beam Welding

This work was to reveal the residual stress profile in electron beam welded Ti-6Al-4V alloy plates(50 mm thick) by using finite element and contour measurement methods.A three-dimensional finite element model of 50-mmthick titanium component was proposed,in which a column–cone combined heat source model was used to simulate the temperature field and a thermo-elastic–plastic model to analyze residual stress in a weld joint based on ABAQUS software.Considering the uncertainty of welding simulation,the computation was calibrated by experimental data of contour measurement method.Both test and simulated results show that residual stresses on the surface and inside the weld zone are significantly different and present a narrow and large gradient feature in the weld joint.The peak tensile stress exceeds the yield strength of base materials inside weld,which are distinctly different from residual stress of the thin Ti-6Al-4V alloy plates presented in references before.     

Microstructures and Tensile Properties of Ultrafine-Grained Ni–(1–3.5) wt% SiC_(NP) Composites Prepared by a Powder Metallurgy Route

Silicon carbide nanoparticle-reinforced nickel-based composites(Ni–Si CNP),with a Si CNPcontent ranged from1 to 3.5 wt%,were prepared using mechanical alloying and spark plasma sintering.In addition,unreinforced pure nickel samples were also prepared for comparative purposes.To characterize the microstructural properties of both the unreinforced pure nickel and the Ni–Si CNPcomposites transmission electron microscopy(TEM) was used,while their mechanical behavior was investigated using the Vickers pyramid method for hardness measurements and a universal tensile testing machine for tensile tests.TEM results showed an array of dislocation lines decorated in the sintered pure nickel sample,whereas,for the Ni–Si CNPcomposites,the presence of nano-dispersed Si CNPand twinning crystals was observed.These homogeneously distributed Si CNPwere found located either within the matrix,between twins or on grain boundaries.For the Ni–Si CNPcomposites,coerced coarsening of the Si CNPassembly occurred with increasing Si CNPcontent.Furthermore,the grain sizes of the Ni–Si CNPcomposites were much finer than that of the unreinforced pure nickel,which was considered to be due to the composite ball milling process.In all cases,the Ni–Si CNPcomposites showed higher strengths and hardness values than the unreinforced pure nickel,likely due to a combination of dispersion strengthening(Orowan effects) and particle strengthening(Hall–Petch effects).For the Ni–Si CNPcomposites,the strength increased initially and then decreased as a function of Si CNPcontent,whereas their elongation percentages decreased linearly.Compared to all materials tested,the Ni–Si CNPcomposite containing 1.5% Si C was found more superior considering both their strength and plastic properties.