The Design and Implemention of Subjective Questions Automatic Scoring Algorithm in Intelligent Turtoring System

2013 ◽  
Vol 347-350 ◽  
pp. 2647-2650
Author(s):  
Yao Wen Xia ◽  
Zhi Ping Li ◽  
Sai Dong Lv ◽  
Guo Hua Tang
Keyword(s):  
Reference Value ◽  
Test System ◽  
Fuzzy Mathematics ◽  
Key Technology ◽  
Scoring Algorithm ◽  
Automatic Scoring ◽  
Network Test System

Automatic subjective question of marking is a key technology in the network test system. In order to solve this problem, this paper analyzes the grading teachers thinking reviewers subjective questions. Then introduce the concept of a one-way approach degree based on the nearness theory of fuzzy mathematics. Finally design a subjective question automatic scoring algorithm and give a specific algorithm achievement. It provide certain reference value of automatic scoring of subjective questions.

Experiment analysis of spindle performance with rolling bearing under non-uniform preload

2016 ◽  
Vol 230 (17) ◽  
pp. 3135-3146 ◽  
Author(s):  
Xiao-hu Li ◽  
Yan-fei Zhang ◽  
Jun Hong ◽  
Hong Zhao ◽  
Huan-feng Li
Keyword(s):  
Uniform Distribution ◽  
Reference Value ◽  
Bending Moment ◽  
Rolling Bearing ◽  
Test System ◽  
Dynamic State ◽  
Static State ◽  
Spindle Shaft ◽  
Action Point ◽  
Manufacturing Errors

As a result of the manufacturing errors in the main parts of spindle, and the errors in assembly process of spindle, as well as the non-uniform heat distribution during spindle operation, the non-uniformly distributed preload in rolling bearing is inevitable. The non-uniform preload has not only axial force on the rolling bearing, but also the bending moment around the rolling bearing center. The effect of preload in bearing being non-uniform on the spindle performance is still unclear. In order to analyze the spindle performance with rolling bearing under non-uniform preload, a spindle test system with adjustable non-uniform distribution preload is built. By changing the magnitude of preload force on each action point, it can make the preload force distribute non-uniformly. In the static state of spindle, upon the change of non-uniformly distributed preload, the radial displacement of spindle shaft end is also changed, while in the dynamic state of spindle, it will lead to the change of the rotation center of spindle as a result of bending moment accompanying the non-uniform preload. Furthermore, the dynamic and static results show that when the preload is under non-uniform distribution, the spindle performance is significantly different from that under uniform preload. So this study would have certain reference value to check the spindle performance and explore novel preload method for rolling bearing.

XML Digital Signature Application in Network Test System

2014 ◽  
Vol 513-517 ◽  
pp. 2016-2019
Author(s):  
Xiao Feng Wang
Keyword(s):  
Digital Signature ◽  
Data Transmission ◽  
Data Security ◽  
Digital Signatures ◽  
Test System ◽  
Signature Verification ◽  
Network Data ◽  
Verification Process ◽  
Network Test System ◽  
Xml Digital Signature

This paper describes the concept of XML digital signatures, analyzes the digital signature and the signature verification process, describes the W3C digital signature specification, and studies how to ensure data security in network exam in C #.NET environment. Experiments show that: XML digital signature in network test system ensures the integrity of network data transmission, the identity of verifiability and non-repudiation.

Study on Combustor Outlet Temperature Field of Gas Turbine

2011 ◽  
Vol 138-139 ◽  
pp. 962-966 ◽  
Author(s):  
Kai Liu ◽  
Li Xu
Keyword(s):  
Experimental Study ◽  
Temperature Field ◽  
Gas Turbine ◽  
Reference Value ◽  
Test System ◽  
Outlet Temperature ◽  
Test Results ◽  
Heavy Duty ◽  
Pressure Test ◽  
Heavy Duty Gas Turbine

Experimental study on combustor outlet temperature field of heavy-duty gas turbine had been finished on high-pressure test system. Experimental results indicate: The OTDF is sensitive to diameter of dilution holes, and the RTDF is sensitive to location of dilution holes. The test results have important guiding significance and reference value to design, commission and working about the similar combustor.

Design and Realization of One Circuit Board General Test System Based on USB

2011 ◽  
Vol 121-126 ◽  
pp. 1977-1981
Author(s):  
Lei Lei ◽  
Jia Jing Zhuo ◽  
He Chen ◽  
Xian Feng Luo ◽  
Wei Peng
Keyword(s):  
Software Architecture ◽  
Detection System ◽  
Test System ◽  
Automatic Testing ◽  
Circuit Board ◽  
Hardware Platform ◽  
Key Technology ◽  
General Test ◽  
Circuit Board Testing

According to one system circuit board testing needs，one general circuit board detection system based on USB is designed，which achieve interactive testing on system multiple electronic subassembly and automatic testing on circuit board.The system hardware platform and software architecture and key technology is given in this paper.

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