Test paper evaluation is an important work for the management of tests,which results are significant bases for scientific summation of teaching and learning.Taking an English test paper of high students'monthly ex...Test paper evaluation is an important work for the management of tests,which results are significant bases for scientific summation of teaching and learning.Taking an English test paper of high students'monthly examination as the object,it focuses on the interpretation of SPSS output concerning item and whole quantitative analysis of papers.By analyzing and evaluating the papers,it can be a feedback for teachers to check the students'progress and adjust their teaching process.展开更多
Nowadays, the computer is increasingly popular, and college examination is developing in the direction of traditional examination means to automation and intelligence ones gradually, all these make it inevitable to co...Nowadays, the computer is increasingly popular, and college examination is developing in the direction of traditional examination means to automation and intelligence ones gradually, all these make it inevitable to construct question bank for courses, and to generate test paper using computers. This paper uses the Delphi technique, to make improvements to existing components, combining with VBA programming, and use of SQL Server to implement the question bank management and test paper auto-generation system, which could generate test paper in Word Document. A large number of tests show that the software is running stably and system features are functioning correctly on Windows 2000/XP/2003 platform with Office XP/2003 environment.展开更多
The system uses B / S mode and ASP as the web-based support and connects with the SQL Server 2005 database, which realizes the automatic and manual assessment of Photoshop course exam management operations. At the sam...The system uses B / S mode and ASP as the web-based support and connects with the SQL Server 2005 database, which realizes the automatic and manual assessment of Photoshop course exam management operations. At the same time, it will be able to generate paper reference to test the difficulty levels of papers.展开更多
To obtain accurate fatigue life results for construction machinery components,acquiring load spectra is crucial,as their authenticity and validity directly determine the precision of the analysis.In working conditions...To obtain accurate fatigue life results for construction machinery components,acquiring load spectra is crucial,as their authenticity and validity directly determine the precision of the analysis.In working conditions,component attitudes change continuously,but they remain static on the vibration test rig(VTR),so the acquired target signals should match with the actual component attitudes in the driving signal generation.This paper proposes an efficient and economical simulation-based virtual VTR for fatigue analysis of dozers.First,the relationship between the push arm rotation angle and the cylinder stroke is established,since the cylinder strokes can be measured easily in data acquisition experiments.Second,load decomposition is used to determine the attitude relationship between virtual VTR conditions and actual conditions,and target signals are calculated based on this attitude relationship and measured data.According to the system's frequency response function,the driving signals are iterated until the system's response signals converge with the target signals.Finally,the iteratively obtained load spectra are utilized for fatigue life analysis.The results show that the virtual VTR can effectively and accurately obtain the results of fatigue analysis and has engineering application significance.展开更多
The UHVAC 1 000-kV transmission system is so far the one with the most advanced transmission technique applied and highest operation voltage.There are no guidelines or standards available for the design of 1 000-kV ov...The UHVAC 1 000-kV transmission system is so far the one with the most advanced transmission technique applied and highest operation voltage.There are no guidelines or standards available for the design of 1 000-kV overhead transmission line in China.Study on key technologies and design schemes shall be carried out to ascertain the technical principles and construction standards for project construction,which are presented in this paper based on the Southeast Shanxi-Nanyang-Jingmen test and demonstration transmission line.A comparison and analysis of technical data and economic indices between UHV line and other lines are also described.展开更多
目的探讨新医科背景下中国大学大规模在线开放课程(massive open online courses,MOOC)在线平台在《职业卫生与职业医学》教学中的应用价值。方法2020年3月—2021年3月,选择南昌大学公共卫生学院2016年、2017年统招预防医学专业学生为...目的探讨新医科背景下中国大学大规模在线开放课程(massive open online courses,MOOC)在线平台在《职业卫生与职业医学》教学中的应用价值。方法2020年3月—2021年3月,选择南昌大学公共卫生学院2016年、2017年统招预防医学专业学生为研究对象,共181名。将2016级84名学生分为线上组,接受《职业卫生与职业医学》的线上教学;2017级97名学生分为线下组,接受该课程的线下教学。将所有学生考试成绩录入试卷分析系统,在试卷质量分析基础上比较2组学生的考试成绩。结果2组学生期末考试试卷质量基本处于同等水平,试题分布及难易度较合理,差异无统计学意义(P>0.05),具有可比性,且2组学生成绩分布均呈现正态分布。进一步统计结果表明,线上组学生期末考试成绩高于线下组,差异有统计学意义(P<0.05)。线上组及格率高于线下组,差异有统计学意义(P<0.05)。结论在新医科背景下,基于中国大学MOOC在线平台的线上教学模式能明显提高《职业卫生与职业医学》课程的教学效果,这为新时代深入开展该课程的线上教学改革提供参考和思路。展开更多
The program slicing technique is employed to calculate the current values of the variables at some interest points in software test data generation. This paper introduces the concept of statement domination to represe...The program slicing technique is employed to calculate the current values of the variables at some interest points in software test data generation. This paper introduces the concept of statement domination to represent the multiple nests, and presents a dynamic program slice algorithm based on forward analysis to generate dynamic slices. In the approach, more attention is given to the statement itself or its domination node, so computing program slices is more easy and accurate, especially for those programs with multiple nests. In addition, a case study is discussed to illustrate our algorithm. Experimental results show that the slicing technique can be used in software test data generation to enhance the effectiveness.展开更多
文摘Test paper evaluation is an important work for the management of tests,which results are significant bases for scientific summation of teaching and learning.Taking an English test paper of high students'monthly examination as the object,it focuses on the interpretation of SPSS output concerning item and whole quantitative analysis of papers.By analyzing and evaluating the papers,it can be a feedback for teachers to check the students'progress and adjust their teaching process.
文摘Nowadays, the computer is increasingly popular, and college examination is developing in the direction of traditional examination means to automation and intelligence ones gradually, all these make it inevitable to construct question bank for courses, and to generate test paper using computers. This paper uses the Delphi technique, to make improvements to existing components, combining with VBA programming, and use of SQL Server to implement the question bank management and test paper auto-generation system, which could generate test paper in Word Document. A large number of tests show that the software is running stably and system features are functioning correctly on Windows 2000/XP/2003 platform with Office XP/2003 environment.
文摘The system uses B / S mode and ASP as the web-based support and connects with the SQL Server 2005 database, which realizes the automatic and manual assessment of Photoshop course exam management operations. At the same time, it will be able to generate paper reference to test the difficulty levels of papers.
基金Shandong Province Science and Technology SMES innovation ability improvement project and Rizhao Key Research and Development Project,Grant/Award Number:2022TSGC2504National Natural Science Foundation of China,Grant/Award Number:52378402+1 种基金Shandong Provincial Natural Science Foundation Youth Project,Grant/Award Numbers:ZR2022QE021,ZR202211100077Taishan Scholar Project,Grant/Award Number:tsqn202312024。
文摘To obtain accurate fatigue life results for construction machinery components,acquiring load spectra is crucial,as their authenticity and validity directly determine the precision of the analysis.In working conditions,component attitudes change continuously,but they remain static on the vibration test rig(VTR),so the acquired target signals should match with the actual component attitudes in the driving signal generation.This paper proposes an efficient and economical simulation-based virtual VTR for fatigue analysis of dozers.First,the relationship between the push arm rotation angle and the cylinder stroke is established,since the cylinder strokes can be measured easily in data acquisition experiments.Second,load decomposition is used to determine the attitude relationship between virtual VTR conditions and actual conditions,and target signals are calculated based on this attitude relationship and measured data.According to the system's frequency response function,the driving signals are iterated until the system's response signals converge with the target signals.Finally,the iteratively obtained load spectra are utilized for fatigue life analysis.The results show that the virtual VTR can effectively and accurately obtain the results of fatigue analysis and has engineering application significance.
文摘The UHVAC 1 000-kV transmission system is so far the one with the most advanced transmission technique applied and highest operation voltage.There are no guidelines or standards available for the design of 1 000-kV overhead transmission line in China.Study on key technologies and design schemes shall be carried out to ascertain the technical principles and construction standards for project construction,which are presented in this paper based on the Southeast Shanxi-Nanyang-Jingmen test and demonstration transmission line.A comparison and analysis of technical data and economic indices between UHV line and other lines are also described.
文摘目的探讨新医科背景下中国大学大规模在线开放课程(massive open online courses,MOOC)在线平台在《职业卫生与职业医学》教学中的应用价值。方法2020年3月—2021年3月,选择南昌大学公共卫生学院2016年、2017年统招预防医学专业学生为研究对象,共181名。将2016级84名学生分为线上组,接受《职业卫生与职业医学》的线上教学;2017级97名学生分为线下组,接受该课程的线下教学。将所有学生考试成绩录入试卷分析系统,在试卷质量分析基础上比较2组学生的考试成绩。结果2组学生期末考试试卷质量基本处于同等水平,试题分布及难易度较合理,差异无统计学意义(P>0.05),具有可比性,且2组学生成绩分布均呈现正态分布。进一步统计结果表明,线上组学生期末考试成绩高于线下组,差异有统计学意义(P<0.05)。线上组及格率高于线下组,差异有统计学意义(P<0.05)。结论在新医科背景下,基于中国大学MOOC在线平台的线上教学模式能明显提高《职业卫生与职业医学》课程的教学效果,这为新时代深入开展该课程的线上教学改革提供参考和思路。
基金the National Natural Science Foundation of China (No. 60473032)the Science and Technology Emphases Item of China Ministry of Education (No. 105018)the Beijing Natural Science Foundation (No. 4072021)
文摘The program slicing technique is employed to calculate the current values of the variables at some interest points in software test data generation. This paper introduces the concept of statement domination to represent the multiple nests, and presents a dynamic program slice algorithm based on forward analysis to generate dynamic slices. In the approach, more attention is given to the statement itself or its domination node, so computing program slices is more easy and accurate, especially for those programs with multiple nests. In addition, a case study is discussed to illustrate our algorithm. Experimental results show that the slicing technique can be used in software test data generation to enhance the effectiveness.
