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Method enabling parameters of computational problems in electricity test system to be changeable

A technology of examination system and calculation questions, applied in the field of electric power, can solve problems such as the degree of flexible mastery of unfavorable knowledge points

Inactive Publication Date: 2014-04-30
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the characteristics of the industry in the electric power test, there are often calculation questions that can be calculated according to formulas. In the current test system, the calculation questions in the test papers of all test students are the same, which is not conducive to preventing plagiarism between test students and is not conducive to inspection. Students' flexibility in grasping knowledge points

Method used

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  • Method enabling parameters of computational problems in electricity test system to be changeable
  • Method enabling parameters of computational problems in electricity test system to be changeable
  • Method enabling parameters of computational problems in electricity test system to be changeable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The specific test questions are explained below:

[0029] Question 1: The original question is as follows:

[0030] Resistor R=125Ω, inductance Xl=1.2Ω, capacitive reactance Xc=200Ω form a series resistor, connect to the power supply with voltage U=230V, find apparent power S and active power P.

[0031] Answer: S=__, P=__.

[0032] The parameter analysis for Question 1 is as follows:

[0033] Resistance R=125Ω (self-variable parameter 1), inductance X l =1.2Ω (independent variable parameter 2), capacitive reactance X c = 200Ω (variable parameter 3) to form a series resistance, connected to the power supply with voltage U = 230V, find the apparent power S (strain parameter 1), active power P (strain parameter 2).

[0034] Answer: S=__, P=__

[0035] Among them: set the value range of resistance R as 120-230; inductance X l The value range is 1.2-3.4, retaining 1 decimal place; capacitive reactance X c The range is 120-340.

[0036] The editing or importing of th...

Embodiment 2

[0060] The specific test questions are explained below:

[0061] Question 2: The original test questions are as follows:

[0062] Use a standard device of an electric energy meter to measure the relative error of an electric energy meter with good short-term stability under a certain load. In a short period of time, under the same conditions, independently measure n=10 times, and the error data obtained gamma n Respectively: 0.23%, 0.20%, 0.21%, 0.22%, 0.23%, 0.19%, 0.24%, 0.22%, 0.18%, 0.23%, try to calculate the single measurement standard deviation estimate S and the maximum possible random error gamma max .

[0063] Answer: S=__, γmax=__.

[0064] The parameter analysis for Question 2 is as follows:

[0065]Use a watt-hour meter standard device to measure the relative error of a watt-hour meter with better short-term stability under a certain load. In a short period of time, under the same conditions, measure n=10 times independently (self-variable parameters) , the ...

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Abstract

The invention discloses a method enabling parameters of computational problems in electricity test system to be changeable. The method comprises the following steps that a formula Y(yn)=F(xm) of the calculation model is set up corresponding to each problem, the stored data structures of types of the computational problems are defined, execution codes are automatically generated and dynamically compiled according to the formula of the calculation model, the execution codes enter an algorithm base to generate corresponding calculation model numbers, according to the calculation model and the set evaluation condition, self-variable parameter numerical values meeting the requirement are generated randomly and displayed on the problems, the problems with the different self-variable parameter numerical values are automatically generated for each test paper, when examinees submit the papers, and the calculation model number of each problem, the self-variable parameters generated automatically, and answers, filled in by the examinees, of strain parameters are uniformly transmitted back to a server. According to the method, the self-variable parameters are generated randomly to generate the problems, for the examination of the same knowledge point, different students can get the different problems, and therefore cheating is prevented, and the method is beneficial for examining the flexible mastery degree of the knowledge point by the students.

Description

technical field [0001] The invention relates to a method for variable parameters of calculation questions in an electric power examination system, belonging to the technical field of electric power. Background technique [0002] With the development of online learning and online examinations, online learning and online examinations are gradually carried out in the electric power industry. According to the characteristics of the industry in the electric power test, there are often calculation questions that can be calculated according to formulas. In the current test system, the calculation questions in the test papers of all test students are the same, which is not conducive to preventing plagiarism between test students and is not conducive to inspection. The students' flexible mastery of knowledge points. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art, and provide a method for ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F9/44G06Q50/20
Inventor 陈泾生王勤张量
Owner STATE GRID CORP OF CHINA