Choose the Best Coach Based on the Theory of Grey System

Jia Zhao

doi:10.4028/www.scientific.net/AMR.998-999.1757

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The Reflection for Multimedia Technology Application in Medical Chemistry Teaching
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The Research and Design of Computerized Adaptive English Testing System
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The Research of Communication of Chinese Language and Culture under New Technologies
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The Research on the Mechanism Construction of the University Informatization in China
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Research on the Design and Realization of Electrical Training System Based on the Virtual Reality Technology
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Choose the Best Coach Based on the Theory of Grey System
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Research on Countermeasures Based on Enterprise Practice of the Higher Vocational Teachers
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Application of Wireless Network on Campus
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Research on the Status Quo and the Character of the Development of the National Fitness Program
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 998-999Choose the Best Coach Based on the Theory of Grey...

Choose the Best Coach Based on the Theory of Grey System

Abstract:

In order to select “the best all time college coach” across both genders and all possible sports, we establish a multi-hierarchy evaluation model based on the theory of grey system. Without affecting the reliability of the results, we analyze the distribution of every index to determine the initial screening standard, narrow target range and simplify the problem. Then, we use the theory of grey system to evaluate coaches. We first normalize all indexes to make them comparable. Second, we determine a set of the best indexes as the reference vector and obtain the correlation coefficient matrix. On the issue of the weight of all indexes, we introduce the concept of dynamic weight matrix by considering the distribution and relative size of them. After that, we obtain the value of the final evaluation from the correlation coefficient matrix and dynamic weight matrix .As for the influence of time on the evaluation, we regroup the data of coaches according to the time section for five years, which results in some statistical variables, and then we draw the trend graph of them. To sum up, the number of excellent coaches of every sport is increasing over time, but the average value and standard deviation of winning percentage is decreasing. The model has the adaptability on different sports by comparison. And because the data of women coaches is insufficient, the influence of genders on the evaluation needs to be researched further.