计算机组卷方法研究

主要讨论了试题库的建构及试题的生成方法。主要包括了各类型试题的题库结构;依据难度比例要求生成试题;生成选择题题目、选项一致但选项次序不同的等价选择题;生成题型、题目一致但次序不同的等价试卷。     

A microcomputer program for hydropathic analysis of proteins with I/O through word processing and graphics software

A BASIC program has been devised for the hydropathic analysis of protein sequences according to the method of Kyte and Doolittle (1982). The program uses sequence data from input files that are created with a word processor and produces two types of output file: one contains a bar graph of the hydropathic profile in a format that can be easily edited; the other is a tabulation of hydropathic indices along a protein's sequence that can be used as input by the program for the production of a bar graph or as input into other graphics and analysis software. An MS-DOS microcomputer, operating under IBM BASICA or GWBASIC and a dot matrix printer with block graphics capabilities are the only hardware requirements for graphic display of hydropathy profiles. The program is capable of unattended analysis from a list of up to 15 input files.     

利用Authorware实现选择题考试系统

该文通过描述一个使用Authorware软件实现的选择题考试系统的制作过程,介绍了从计算机考试系统的分析到具体实现的全过程。为当前学生考试的命题、测试、阅卷工作的自动化处理提供了一种简便、高效的方法。该文实现了考试系统中人机交互、自动阅卷等功能,并详细论述了运用嵌套循环的方式随机抽取试题和随机排列题支顺序的具体过程。     

Authorware中基于文本文件的自动出题系统

在教师CAI教学中经常需要使用Authorware制作练习题。该文以单选题为例,介绍了一种简单的自动出题系统。该系统使用文件文件制作题库,在Authorware中通过文件操作语句直接访问文本文件,实现了自动出题、自动批改的功能。     

考试系统中Office主观题阅卷方法研究

分析现有计算机考试系统中Office主观题的阅卷方法,介绍了较普遍的基于OLE技术的实现方法,同时提出了一种简便的、悬浮窗流水评卷的人工辅助阅卷方式。比较了两种不同处理方式的特点,以及相应的题库建设、考试等环节的处理。人工参与的悬浮窗流水评卷法相对开发代价小、实现方便,在很难实现的文字类主观题自动阅卷上具有一定的应用价值。     

基于VBA的高级工考试自动评分研究

计算机系统管理员的高级工考试是一项资格认证考试,与之相适应需要一项自动的评分系统.其中选择题的自动评分已经实现,而操作题需要手工阅卷.为了实现对操作题的答题结果自动评分,采用VBA技术分析考生的操作结果,可以实现自动阅卷且准确性高.     

The UCL distorted wave code

The DW code of University College London computes collision strengths and reactance matrix elements in LS coupling for excitation of atoms and positive ions by electron impact in a partial wave expansion. A multiconfigurational target serves as the scatterer; the partial waves are central field solutions to a distorted wave (DW) approximation.The DW program is run by linking two source codes: program COLALG and a modifying module called DWMODS. In stand-alone mode COLALG creates a file to the requirements of the electron collission program IMPACT, passing on target data and the angular expansion coefficients of collisional symmetries. Linked with DWMODS and program writes a reactance matrix file directly readable by JaJOM; the output file OMEGA is compatible with a similar file created by the QUB R-matrix code. Collisional details can be extracted depending upon the printing level.The UCL macro-processor with the source codes as input creates ForTran 77 files; apart from replacing size parameters is switches parts of code on and off depending upon directives.     

Comparison of oral examination and electronic examination using paired multiple-choice questions

The aim of the present research was to compare the use of multiple-choice questions (MCQs) as an examination method against the oral examination (OE) method. MCQs are widely used and their importance seems likely to grow, due to their inherent suitability for electronic assessment. However, MCQs are influenced by the tendency of examinees to guess answers, warranting research concerning scoring rules different from the simple positive-grades-only scores rule. Alternatively, OE is used in tertiary education, since it enables the assessment of intellectual capabilities and personal traits to a level not found in most other examination formats. However, the significant resource requirements of OE, especially in structured forms, might excessively strain the resources of academic institutions. In the present study, an MCQ test was given to examinees, in the framework of a computer-based learning system. The same examinees took also an OE possessing elements of structure, with three examiners concurrently and independently grading each of the examinees. In the MCQs examination a set of pairs of MCQs was composed. The MCQs in each pair were similar concerning the same topic, but this similarity was not evident for an examinee that did not possess adequate knowledge on the topic addressed in the questions of the pair. The scoring of the paired questions avoided the procedure of mixed-scoring, i.e., both positive and negative markings, while at the same time a pair-wise bonus/penalty scoring rule was adopted. The results of the “paired” MCQs examination, when using the pair-wise scoring rule, were statistically indistinguishable with the grades produced by the OE, when made to the same sample of students, on the same topics and with the same levels of difficult. Both the results of the paired MCQs examination, when using the pair-wise scoring rule, and the OE results differed significantly from those obtained by scoring the same MCQs using a positive-grades-only scoring rule that ignored the pairing of MCQs.     

Analysis of file usage in personal computer environments

This paper discusses collection, analysis and interpretation of data pertaining to files in personal computer (PC) environments. We developed programs to collect and analyze data from PCs running the OS/2¹ operating system and using the High Performance File System (HPFS). The data collection program gathers the information about file sizes, the times and dates of file creation, the last file access, and the last file update by scanning the contents of disk storage devices. The gathered information is used to analyze the distributions of file sizes, functional file lifetimes, and functional lifetimes of file's data. The analysis shows that: most files are small (more than 60% of files on a system are smaller than 8 Kbytes), about 60% of files on a system have never been accessed again after being created and very few files are ever modified. Recommended by: N. Boudriga     

Comparison of examination methods based on multiple-choice questions and constructed-response questions using personal computers

The aim of the present research was to compare the use of multiple-choice questions (MCQs) as an examination method, to the examination based on constructed-response questions (CRQs). Despite that MCQs have an advantage concerning objectivity in the grading process and speed in production of results, they also introduce an error in the final formulation of the score. The error is traced to the probability of answering a question by chance or based on an instinctive feeling, which does not enable the ascertainment of the knowledge of the whole background included in the question. In the present study, both MCQ and CRQ tests were given to examinees, in the framework of a computer-based learning system. Avoiding the procedure of mixed scoring, e.g. both positive and negative markings, a set of pairs of MCQs was composed. The MCQs in each pair were similar concerning the same topic, but this similarity was not evident for an examinee that did not possess adequate knowledge on the topic addressed in the questions of the pair. The examination based on these “paired” MCQs, by using a suitable scoring rule, when made to the same sample of students, οn the same topics and with the same levels of difficulty, gave results that were statistically indistinguishable with the grades produced by an examination based on CRQs, while both the “paired” MCQ test results and the CRQ test results differed significantly from those obtained from a MCQ test using positive-only scoring rule.     

POLYPLOT—an interactive modular program in basic for plotting graphs

POLYPLOT is an interactive program in BASIC, with a modular structure, for plotting x-y graphs on a conventional printer. The options offered by POLYPLOT are: input of data from keyboard or disk file: single parameter or combination of parameters assigned to each axis; log plots: best-fit line and polynomial curve fitting; program scaling or user scaling of the axes; replotting of a data set, excluding samples, either individually or in groups. POLYPLOT may be used to create a large number of different programs because each option is contained in program modules which may be merged into a central program framework as required. The options operate independently so that programs containing any combination of options may be created.     

基于工艺特征识别技术的数控自动编程方法研究

研究从基于STEPAP203标准的中性文件中提取零件工艺特征以及根据工艺特征建立加工工艺的方法。分析了STEPAP203文件及其数据结构,运用VB.NET语言进行词法分析,根据电极工艺特征的特点,研究出了从STEP文件中提取并识别简单工艺特征的方法。根据零件的不同加工方法,利用PowerMILL的"宏指令"功能保存电极的优秀编程资源,建立了可重用的加工工艺数据库,最后建立加工工艺与工艺特征之间的映射关系。所采用的工艺特征识别方法能够识别常用的模具电极工艺特征,与可重用的加工工艺结合能够实现特征识别系统与CAM系统的无缝连接。     

Simulation and video software development for soil consolidation testing

The development techniques and file structures of CTM, a novel multi-media (computer simulation and video) package on consolidation and laboratory consolidation testing, are presented in this paper. A courseware tool called Authorware proved to be versatile for building the package and the paper shows in details how the file structure of CTM is implemented within Authorware. In the audio–visual parts of the package background information, animations on consolidation theory and practice as well as standard and large-scale model consolidation tests, are shown. Running the package in a multi-user examination-type setting proved to be effective for learning and control of the learning process. Content-oriented multiple-choice questions on the theoretical and professional aspects of the test are posed, and users response is evaluated and reported on log files. Student users have responded positively to this development indicating minor future improvements.     

Parallel line analysis: multifunctional software for the biomedical sciences

An easy to use, interactive FORTRAN program for analyzing the results of parallel line assays is described. The program is menu driven and consists of five major components: data entry, data editing, manual analysis, manual plotting, and automatic analysis and plotting. Data can be entered from the terminal or from previously created data files. The data editing portion of the program is used to inspect and modify data and to statistically identify outliers. The manual analysis component is used to test the assumptions necessary for parallel line assays using analysis of covariance techniques and to determine potency ratios with confidence limits. The manual plotting component provides a graphic display of the data on the terminal screen or on a standard line printer. The automatic portion runs through multiple analyses without operator input. Data may be saved in a special file to expedite input at a future time.     

Flash课件中一类单选题的设计与实现

在制作选择题课件方面,Flash具有其它课件制作软件无可比拟的优势.通过一个单选题课件实例的研究,分析了用Flash的UI组件和ActionScript脚本语言制作一类选择题课件的方法.     

用VC++语言创建WORD文档

简单文本格式无法生成复杂的表格和图形，因而采用WORD(或EXCEL)作为专用软件的数据报表文件是很有意义的，它可以按照用户要求将数据以图表的形式形象地表示出来。为了在VC 环境中创建和生成WORD文档，必须利用COM技术，把WORD程序看做COM服务器，把用户程序看做客户端，利用COM技术创建WORD对象，利用WORD对象调用VBScript函数(宏函数)来控制WORD文档的生成。通过研究证实该技术是可行的，并且对OFFICE软件都适用。     

MetaModel: a program for modelling and control analysis of metabolic pathways on the IBM PC and compatibles

MetaModel is a user-friendly program for calculating steady-state fluxes and metabolite concentrations of metabolic systems on the IBM PC and compatible computers. For any steady state that is obtained, one can then calculate a matrix of elasticity coefficients at that steady state, or a matrix of control and response coefficients. It thus offers a simple way to calculate the control structure of a pathway: it provides not only an educational tool that allows the student to verify empirically the classic summation relationships of metabolic control analysis but also a research tool for addressing 'what if?' questions about the behaviour of metabolic systems. Results can not only be printed or stored in a file, but can also be written to a special file that can be read by popular spreadsheet programs, thereby giving access to rapid, flexible and powerful methods for subsequent analysis and plotting of these results.     

运用ASP语言进行考试软件开发探究

网上考试是教育信息化发展的必然趋势,该方式很大程度上克服了传统考试的弊端:试卷组织要简单,只要在维护好题库的情况下,试卷随即抽取完成;省略了试卷的印刷和运输过程;试卷试题是随机排列的,省略了组织监考的大量工作,该文理论联系实际,对运用ASP语言软件进行考评软件的设计与开发进行了研究。     

GEOFILE: an interactive program in basic for creating and editing data files

GEOFILE is a versatile, interactive program in BASIC for the creation and editing of data files. These files consist of a two-dimensional array of numerical values, rows corresponding to different parameters, and columns to different samples. In addition to numerical values, the files also contain strings corresponding to sample numbers, sample labels, and parameter symbols. Rapid and successful file creation is assisted by the large number of error-traps in the program and comprehensive file editing is accomplished partly through a simple routine which uses an alphanumeric grid to identify data items. Files created and/or edited may be stored on disk for subsequent use in a variety of other programs such as graph plotting or statistical analysis.     

网站语音播报程序的设计与实现

本文详细介绍了两种实现网站语音播报程序的设计与实现方法.内嵌Real Player(RealOne Player)控件的方法通过自动播放ASP程序生成的一个播放语音列表文件来实现播音;内嵌Flash对象则通过其库文件的Linkage Property属性建立音频库文件与动画脚本的链接,在动画中通过脚本调用库文件中相应的声音文件实现播音.