This paper has put forward a concept of optimal supporting time through analysing the influence of the supporting time in the heading face on the supporting result of surrounding rock.The method Of the optimal Support...This paper has put forward a concept of optimal supporting time through analysing the influence of the supporting time in the heading face on the supporting result of surrounding rock.The method Of the optimal Supporting time determined by graphical method is discussed, and the calculating formula for determining the optimal supporting time through the analysis method is derived.展开更多
A new customization approach based on support vector regression (SVR) is proposed to obtain individual headrelated impulse response (HRIR) without complex measurement and special equipment. Principal component ana...A new customization approach based on support vector regression (SVR) is proposed to obtain individual headrelated impulse response (HRIR) without complex measurement and special equipment. Principal component analysis (PCA) is first applied to obtain a few principal components and corresponding weight vectors correlated with individual anthropometric parameters. Then the weight vectors act as output of the nonlinear regression model. Some measured anthropometric parameters are selected as input of the model according to the correlation coefficients between the parameters and the weight vectors. After the regression model is learned from the training data, the individual HRIR can be predicted based on the measured anthropometric parameters. Compared with a back-propagation neural network (BPNN) for nonlinear regression, better generalization and prediction performance for small training samples can be obtained using the proposed PCA-SVR algorithm.展开更多
Nutritional support is a vital approach to improve symptoms of head andneck cancer, which are caused by radiotherapy. Although nutritional supporthas rapid progress, it could appear a variety of problems in nutritiona...Nutritional support is a vital approach to improve symptoms of head andneck cancer, which are caused by radiotherapy. Although nutritional supporthas rapid progress, it could appear a variety of problems in nutritionaltreatment for head and neck cancer patients during radiotherapy. It is introducedthat how to implement nutritional support for head and neck cancerpatients during radiotherapy. It is more important to analyze the problemsin nutrition assessment and nutrition support and intervention. It could bedesigned more convenient nutrition assessment system and try to find outmore sufficient and effective nutrition markers. It also needs to enhancethe nutrition education for patients and their family. In addition to, it couldbe more work to do in oral, nasal feeding and gastrostomy nutrition supplementationand parenteral nutrition support and intervention. Thus, it isa long way to make nutritional support be better in head and neck cancerpatients during radiotherapy.展开更多
文摘This paper has put forward a concept of optimal supporting time through analysing the influence of the supporting time in the heading face on the supporting result of surrounding rock.The method Of the optimal Supporting time determined by graphical method is discussed, and the calculating formula for determining the optimal supporting time through the analysis method is derived.
基金Project supported by the Shanghai Natural Science Foundation (Grant No.08ZR1408300)the Shanghai Leading Academic Discipline Project (Grant No.S30108)
文摘A new customization approach based on support vector regression (SVR) is proposed to obtain individual headrelated impulse response (HRIR) without complex measurement and special equipment. Principal component analysis (PCA) is first applied to obtain a few principal components and corresponding weight vectors correlated with individual anthropometric parameters. Then the weight vectors act as output of the nonlinear regression model. Some measured anthropometric parameters are selected as input of the model according to the correlation coefficients between the parameters and the weight vectors. After the regression model is learned from the training data, the individual HRIR can be predicted based on the measured anthropometric parameters. Compared with a back-propagation neural network (BPNN) for nonlinear regression, better generalization and prediction performance for small training samples can be obtained using the proposed PCA-SVR algorithm.
文摘Nutritional support is a vital approach to improve symptoms of head andneck cancer, which are caused by radiotherapy. Although nutritional supporthas rapid progress, it could appear a variety of problems in nutritionaltreatment for head and neck cancer patients during radiotherapy. It is introducedthat how to implement nutritional support for head and neck cancerpatients during radiotherapy. It is more important to analyze the problemsin nutrition assessment and nutrition support and intervention. It could bedesigned more convenient nutrition assessment system and try to find outmore sufficient and effective nutrition markers. It also needs to enhancethe nutrition education for patients and their family. In addition to, it couldbe more work to do in oral, nasal feeding and gastrostomy nutrition supplementationand parenteral nutrition support and intervention. Thus, it isa long way to make nutritional support be better in head and neck cancerpatients during radiotherapy.