基于C/S模式的无纸化考试系统设计

设计一个基于C/S模式的无纸化考试系统,系统的主要任务包括考试设置、系统资料、系统管理、考生考试管理和教师阅卷管理,该考试系统考试时间灵活,考生随机抽取考试题目,能够对高等院校的作弊现象起到一定的遏制作用。     

基于AutoCAD工程图学考试系统的开发

设计了一个基于AutoCAD的工程图学考试系统。系统以VBA为开发语言,MicrosoftAccess为数据库,通过对AutoCAD进行二次开发,具备了随机组卷、网上考试、智能评卷、统计成绩以及成绩管理等功能。对参数设置模块、时间控制模块,组卷模块、答题界面模块、评判模块、输出模块和成绩管理模块分别进行了论述。     

在线考试系统的分析与设计

相比传统的考试方式,在线考试系统可以为考生提供公平、快捷的考试服务,极大地提高了教学的灵活性,提高了教师的工作效率。目前随着网络技术的迅猛发展,它的应用范围越来越广泛。文章主围绕在线考试系统的设计思想和关键技术展开,着重介绍系统的分析与设计。     

高职院校自主招生考试管理系统设计与实现

本文针对高职院校自主招生考试管理工作,提出基于B/S与C/S相结合的设计原理,包括考生报名,考生资格审核、笔试考务和操作考务的编排、准考证号的生成、考试成绩的录入、考生相片的处理等事务的处理。采用SQL Server2008作为后台数据库平台,利用Visual Studio 2010 C#作为B/S架构的设计工具,实现网上报名系统的考生应用层、业务逻辑层和数据访问层的设计。利用DELPHI作为C/S架构下客户端的招生和考务管理部分的开发工具,实现考生信息管理与审核、考务管理的设计。经过实践,该系统提高了工作效率,保证了数据的准确性,节省人力和物力的支出,帮助高职院校解决招生考试过程中的一系列问题。     

ASP．NETWeb考试系统的初探

ASP．NETWeb考试系统采用B／S架构作为系统的总体结构,以Web数据库技术为依托,利用微软的ASP．NET技术,结合ADO,实现了对Web数据库的访问和查询。该设计实现了按题型随机抽题组卷、在线考试、题库管理、系统管理的功能,能够对客观题在线评分。学生用学号登录成功后,阅读考试须知,之后选择考试科目进入考试页面,完成相应科目考试,自动给出考试成绩。系统管理,实现了对题库、考生信息、考试成绩、考试科目的管理。题库管理,实现了对试题的添加、编辑、删除功能;考生信息管理可以添加、修改、删除、查询考生信息,成绩管理可以删除成绩信息,科目管理主要是修改考试科目信息。     

基于UML的"B/S结构网络在线考试系统"的设计与实现

在分析按照高校考务管理方式,安捧考试、随机题库抽题、在线考试、自动上传答案、单元测验、练习、成绩统计、保存答卷、客观题自动判分、主观题阅卷、输出班级成绩列表、教务管理试卷等网络考试功能的基础上,以面向对象的软件设计和分析方法,着重使用UML分析该软件应用项目的用例图、静态类图、数据库结构图,从而使用asp.net+sql server 2000实现B/S结构网络考试系统.     

基于ARM7的手持考试终端

为解决机动车驾驶员考试过程中的考生身份识别和成绩上传,提出一种用于机动车驾驶员考试的新型手持考试终端。并对其智能化、硬件配置和软件系统进行全面设计。系统以ARM7处理器为核心,并集成大量模拟和数字外围模块,具有较强的数据处理功能及人机界面。     

全国计算机等级考试上机考试技巧

全国计算机等级考试一级MSOFFICE采用无纸化考试。由于一级MSOFFICE考试的题量比较大、出题范围很广,上机操作实践性很强,考生不仅要会理解题意,懂得如何操作,以及相应的操作技巧,而且要达到熟练的操作程度。对于什么是重点、要针对什么复习,如何掌握上机操作考试技巧,我们通过对近年来一级MSOFFICE无纸化考试的试题作了一些分析研究,又参考新大纲中有关一级MSOFFICE的考纲和模拟考题,对考生进行考前有针对性地辅导训练,使考生考试的通过率有了明显的提高。     

应对全国计算机等级考试一级MS-OFFICE的分析和方法

针对目前高校学生参加全国计算机等级考试中一级MS--OFFICE,在复习和考试中遇到的问题,根据我多年的教学经验进行了分析和研究,帮助考生对题型、内容进行分析,使考生更好更快的掌握重点,关键知识并顺利通过考试,为日后的工作打下基础.     

浅谈全国计算机等级考试——二级Visual FoxPro数据库程序设计的上机考试

Visual FoxPro数据库程序设计是全国计算机等级考试的二级考试科目之一,随着目前越来越多的考生报考该科目,Visual FoxPro数据库程序设计已成为很多考生关注的一门语言,通过分析上机考试需注意的几个要点和几种常考题型的解题思路,希望能为报考该科目的考生提供一些帮助。     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

A study of centrifugal cast high boron high speed steel

In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M₂(B,C), (W,Mo)₂(B,C), M₃(B,C), M₂₃(B,C)₆ type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm². The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K₁ mill housing of bar mill.     

Thixotropy of Systems with Shear Thinning and Plastic Flow Behavior

The definition of the thixotropy is a decrease in viscosity with time in shear and a subsequent recovery of viscosity after the shear deformation is removed.We ...     

Effect of Oxide Assisted Metal Nanoparticles on Microstructure and Morphology of Gallium oxide Nanowires

Several researches have been reported about the characteristic of β-Ga2O3 nanowires which was synthesized on nickel oxide particle. But indeed, recent researches about synthesis of β-Ga2O3 nanowires on oxide-assisted transition metal are limited to nickel or cobalt oxide catalyst. In this work, Gallium oxide (β-Ga2O3 ) nanowires were synthesized by a simple thermal evaporation method from gallium powder in the range of 700 - 1000℃ using the iron, nickel, copper, cobalt and zinc oxide as a catalyst, respectively. The β-Ga2O3 nanowires with single crystalline without defects were successfully synthesized at the reaction temperature of 850, 900 and 950℃ in all the catalysts. But optimum experimental condition in synthesis of nanowires varied with the kind of catalyst. As increasing synthesis temperature,the morphology of gallium oxide nanowires changed from nanowires to nanorods, and its diameter increased. From these results, we could be proposed that the growth mechanism of β-Ga2O3 nanowires was changed with synthesis temperature of nanowires. Microstructure and morphology of Synthesized nanowire was characterized by HR-TEM, FE-SEM, EDX and XRD.     

The Influence of Nitrogen and Boron Implant into Silicon Substrate on the Phase and Internal Stress of c-BN Films

Cubic boron nitride(c-BN) film was deposited on a Si (100) substrate by the RF-magnetron sputtering.The mainly problems for fabrication of c-BN films are the low purity and high intrinsic compressive stress. In order to solve the two problems, the c-BN film with the buffer interlayer was deposited on the substrate which had been implanted with nitrogen and/or boron ions. The results show: the implantation of nitrogen ions can obviously increase c-BN content and reduce the internal stress slightly; while the implantation of boron shows no obvious improvement to the content of c-BN, which can reduce the internal stress in the film obviously. In addition, it is suggested that the implantation of nitrogen and boron shows the best result, which not only can increase the content of c-BN, but also reduce the internal stress in the c-BN film obviously.