A simple and fast on-line evaluation system for learning

Author(s):  
Tung-Shou Chen ◽  
Rong-Chang Chen ◽  
Kuei-Ching Lin ◽  
Xin-Yan Wu
Keyword(s):  
Author(s):  
Elena Marqués-Sulé ◽  
Cristina Moya Antón ◽  
Natalia Cezón Serrano ◽  
Maria Àngels Cebrià I Iranzo ◽  
Nuria Sempere-Rubio
Keyword(s):  

2012 ◽  
Vol 605-607 ◽  
pp. 1164-1167
Author(s):  
Yan Chun Xia

Vibration analysis(VA) is a very important method in the industry inspection application. Based on ISO10816, the severity level, certainty rating, the total risk rating matrix and the risk assessment index were proposed in the paper. Based on the testing samplings in a certain company and the assessment system established above, the VA analysis can be conducted and it is a good method for applying the predictive maintenance in the plant.


Author(s):  
M. Izadi ◽  
D. K. Aidun ◽  
P. Marzocca ◽  
H. Lee

The aim of this paper is to describe a monitoring system for fouling phenomenon in tubular heat exchangers. This system is based on a physical model of the fouling resistance. A mathematical model of the fouling resistance is also developed based on applied thermal heat, the inside heat transfer coefficient and geometrical characteristics of the heat exchanger. The resulting model is a function of measured quantities such as water and tube wall temperatures, fluid flow velocities, and some physical properties of the fluid flowing inside the tubes such as viscosity, conductivity, and density. An on-line fouling evaluation system has been prepared and heat transfer resistance for selected solutions has been measured in real time by this system. Experimental results provide quantitative information of liquid-side fouling on heat transfer surfaces, and its effects on the thermal efficiency. Output data is significantly important for the design, and for formulating operating and cleaning schedules of the equipment.


2013 ◽  
Vol 718-720 ◽  
pp. 1782-1785
Author(s):  
Fang Cheng Lü ◽  
Chun Xu Qin ◽  
Yun Peng Liu ◽  
Wen Yi Guo

This paper established the Ultra-High Voltage DC Insulators Long Term Running Research Platform in the National Engineering Laboratory for UHV Engineering Technology (Kunming). The research platform included the following parts: the long-term live examination field for UHV DC equipments, the UHV DC insulators, the leakage current on-line monitoring equipments, the wireless automatic weather station, the infrared monitoring and the ultraviolet monitoring system. The data were real-time processed by the software of the UHV DC insulator information synthetic evaluation system.


2020 ◽  
Author(s):  
Julienne TECLESSOU ◽  
Essossinam KPELAO ◽  
Bayaki SAKA

Abstract Introduction: The License, Master, and Doctorate (LMD) reform which structured high studies in three cycles has been instituted since the Bologna declaration in 1999. To be conformed to international standards, the LMD system has been instituted in university of Lomé in 2009 to foster pathways between medical and paramedical training. The purpose of this study was to evaluate the strengths and weaknesses of the LMD reform since its introduction in medical school of Lomé. Method: It was an opinion survey conducted in 4 months in University of Lomé among the medical school’s teachers about strengths and weaknesses of LMD reform since its application. The strengths were defined as all facilities brought by LMD reform in organization of courses and practices, evaluations, new Information and Communication Technologies (ICTs) (internet, video projector, courses on line). The LMD weaknesses were defined as any problem generated by the LMD system. Results: Of 113 resident teachers of the medical school of Lomé, seventy-six have completed the questionnaire (67.2%). The majority of teachers (74) thought that the introduction of LMD reform will make Lomé medical school fit into international standards. The availability of the video projectors was noted by 90.8% of the teachers and 82.9% of them used it for teaching. There was no online course. The main strengths of LMD were: a better evaluation system (33.3%), the organization of training in units with credit (28.6%), the usage of new ICTs (23.8%). Many weaknesses of LMD reform were noted by teachers: the plethoric number of students (36.2%), the absence of an intermediate diploma and pathways between studies (29.3%). The Insufficiency of human resources and material was also mentioned. Conclusion: This study highlights that LMD reform needs adaptation to local realities and improvement to ensure that students will get good training in conformity with international standards.


Author(s):  
Peter Hartner ◽  
Josef Petek ◽  
Peter Pechtl ◽  
Patrick Hamilton

Accurate on-line plant and equipment performance evaluation is becoming critical in the power generation industry as operators seek to optimize their plants, particularly in competitive power markets. The analysis accuracy of an on-line performance monitoring system is directly dependent on the quality of the input data and usually suffers because installed plant sensors are not high-precision instruments. The inherent measurement uncertainties can be overcome by using a readily available heat balance program in combination with a least square solver. This data reconciliation system will provide the performance evaluation system with data that better reflects the plant’s current operating point, thus improving the performance evaluation system’s output and allowing for better plant optimization. Additionally, the reconciliation system can identify broken, biased or highly noisy sensors. These improvements can be obtained without installing additional precision sensors or putting unreasonable efforts into sensor calibration.


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