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Study on Evaluation Model of Attribute Barycentric Coordinates
Guanglin Xu,Xiaolin Xu 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.9
The core of the comprehensive evaluation problem is how to distribute the weight of each attribute. The attribute coordinate evaluation model (ACEM) has realized dynamic distribution for weight according to the evaluator preference curve, but there still is a problem that maybe a few evaluation results are unreasonable after transforming from locally satisfactory degree to globally satisfactory degree. In order to solve this problem, this paper proposes the improved attribute coordinate evaluation model (IACEM) which directly calculates the global satisfaction, simultaneously, gives the principle to determine whether the final evaluation result is reasonable or not, namely, the principle of weight priority is adopted for the evaluated objects with the same total score level, and the principle of total score priority is adopted for the evaluated objects with different total score levels. To eliminate the errors caused by the change of total score planes, this paper also proposes a parameter adjustment method. The final simulation verifies the correctness and the rationality of the improved model.
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Study of Multi-attribute Comprehensive Evaluation Method Based on Attribute Theory
Xu Guanglin,Liu Nianzu,Duan Xueyan 보안공학연구지원센터 2015 International Journal of Database Theory and Appli Vol.8 No.3
The study of Comprehensive Evaluation Model of Attribute Theory has gained fruitful achievements in both theory and practice. But the current preference curve of evaluator is assumed to be a smooth quadratic equation which fails to well reflect the change of evaluator’s preference when indicators increase. After analyzing the principle of comprehensive evaluation model, this paper does simulation experiments to prove the rationality of the preference curve. By increasing the interpolation points and comparing the evaluator’s preference curves respectively generated by the polynomial interpolation and cubic spline interpolation, a conclusion is reached that cubic spline interpolation is better than the polynomial interpolation, and 4 full-score hyperplanes are to be adopted to get the most rational curve to reflect the change of evaluator’s preference. The main contributions of this paper are the analysis of the rationality of different preference curves under comprehensive evaluation model based on the attribute theory and the finding that the most reasonable curve depend on the selection of different hyperplane S2.
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Guanglin He,Xing Zou,Xu Chen,Renkuan Tang,Jing Yan 한국유전학회 2017 Genes & Genomics Vol.39 No.7
The association between five single nucleotide polymorphisms (SNPs) in brain-derived neurotrophic factor (BDNF) gene (rs6265, rs10767664, rs12273539, rs962369 and rs11030101) and allergic inflammatory disease susceptibility has been extensively reported, while the conclusions were inconclusive. The present study was designed to qualitatively and quantitatively evaluate the relationship between the BDNF polymorphisms and allergic disease risks. A comprehensive literature search of the shared public electronic databases was conducted before September 1, 2016. The pooled odds ratios (ORs) with 95% confidence intervals (CIs) were calculated using review manager 5.3. Eleven eligible studies (a total of 5217, 6432, 6432, 6432, 4216 subjects focused on rs6265, rs10767664, rs12273539, rs962369 and rs11030101, respectively) were finally contained. Significant genetic association of rs6265 variant and susceptibility of allergic inflammation was observed under allele contrast, recessive and over-dominant model in the overall analysis. Besides, stratified analysis by ethnicity found that the close relationship between rs6265 polymorphism and increased allergic disease risk of Caucasian was observed under recessive and over-dominant model, as well as under allele contrast, recessive, homozygous and over-dominant model in the Asian. Additionally, subgroup analysis based on the disease types showed the obvious relation of rs6265 and asthma risk in several hereditary model. Moreover, strong association between rs10767664 polymorphism and extraordinary risk of allergic disease was also detected in four genetic models. However, no association was discovered with rs962369, rs12273539 and rs11030101. The present meta-analysis suggested that the SNPs (rs10767664 and rs6265) in the BDNF gene is potentially associated with increased allergic disease susceptibility.
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Simplified Rotor and Stator Resistance Estimation Method Based on Direct Rotor Flux Identification
Mingyu Wang,Dafang Wang,Guanglin Dong,Hui Wei,Xiu Liang,Zexu Xu 전력전자학회 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.3
Since parameter mismatch seriously impacts the efficiency and stability of induction motor drives, it is important to accurately estimate the rotor and stator resistance. This paper introduces a method to directly calculate the rotor flux that is independent of stator and rotor resistance and electrical angle. It is based on obtaining the rotor and stator resistance using the model reference adaptive system (MRAS) method. The method has a lower computation burden and less adaptation time when compared with other rotor resistance estimation methods. This paper builds three coordinate frames to analyze the rotor flux error and rotor resistance error. A number of implementation issues are also considered.
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Simplified Rotor and Stator Resistance Estimation Method Based on Direct Rotor Flux Identification
Wang, Mingyu,Wang, Dafang,Dong, Guanglin,Wei, Hui,Liang, Xiu,Xu, Zexu The Korean Institute of Power Electronics 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.3
Since parameter mismatch seriously impacts the efficiency and stability of induction motor drives, it is important to accurately estimate the rotor and stator resistance. This paper introduces a method to directly calculate the rotor flux that is independent of stator and rotor resistance and electrical angle. It is based on obtaining the rotor and stator resistance using the model reference adaptive system (MRAS) method. The method has a lower computation burden and less adaptation time when compared with other rotor resistance estimation methods. This paper builds three coordinate frames to analyze the rotor flux error and rotor resistance error. A number of implementation issues are also considered.
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