Due to its highly favorable physical and chemical properties,titanium and titanium alloy are widely used in a variety of industries.Because of the low output of a single batch,plate cold rolling without tension is the...Due to its highly favorable physical and chemical properties,titanium and titanium alloy are widely used in a variety of industries.Because of the low output of a single batch,plate cold rolling without tension is the most common rolling production method for titanium alloy.This method is lack of on-line thickness closed-loop control,with carefully thickness setting models for precision.A set of high-precision thickness setting models are proposed to suit the production method.Because of frequent variations in rolling specification,a model structural for the combination of analytical models and statistical models is adopted to replace the traditional self-learning method.The deformation resistance and friction factor,the primary factors which affect model precision,are considered as the objectives of statistical modeling.Firstly,the coefficient fitting of deformation resistance analytical model based on over-determined equations set is adopted.Additionally,a support vector machine（SVM）is applied to the modeling of the deformation resistance and friction factor.The setting models are applied to a 1450 plate-coiling mill for titanium alloy plate rolling,and then thickness precision is found consistently to be within 3%,exceeding the precision of traditional setting models with a self-learning method based on a large number of stable rolling data.Excellent application performance is obtained.The proposed research provides a set of high-precision thickness setting models which are well adapted to the characteristics of titanium alloy plate cold rolling without tension.展开更多
Microfiltration technique was used to measure white blood cell deformability (WCD) in one hundred and thirty patients with non-nsulin-dependent diabetes mellitus (NIDDM or type Ⅱ). It was found that WCD of the diabet...Microfiltration technique was used to measure white blood cell deformability (WCD) in one hundred and thirty patients with non-nsulin-dependent diabetes mellitus (NIDDM or type Ⅱ). It was found that WCD of the diabetics was significantly decreased compared with fifty controls (P<0.01) and further reduced with the rise of levels of plasma fibrinogen (Fg), plasma lipid, hemoglobin Ale (HbAlc) and fasting blood glucose (FBG), and also with the increase of age, the duration of diabetes, and the reduction of plasma magnesium concentration. It was shown that the decrease of WCD in diabetes mellitus was closely related to the degree of metabolic disturbance of the failure of diabetic control.展开更多
基金Supported by National Natural Science Foundation of China(Grant No.51304017)National Key Technology R&D Program of the 12th Five-year Plan of China(Grant Nos.2012BAF04B02,2011BAE23B04)Fundamental Research Funds for Central Universities,China(Grant No.FRF-SD-12-013B)
文摘Due to its highly favorable physical and chemical properties,titanium and titanium alloy are widely used in a variety of industries.Because of the low output of a single batch,plate cold rolling without tension is the most common rolling production method for titanium alloy.This method is lack of on-line thickness closed-loop control,with carefully thickness setting models for precision.A set of high-precision thickness setting models are proposed to suit the production method.Because of frequent variations in rolling specification,a model structural for the combination of analytical models and statistical models is adopted to replace the traditional self-learning method.The deformation resistance and friction factor,the primary factors which affect model precision,are considered as the objectives of statistical modeling.Firstly,the coefficient fitting of deformation resistance analytical model based on over-determined equations set is adopted.Additionally,a support vector machine（SVM）is applied to the modeling of the deformation resistance and friction factor.The setting models are applied to a 1450 plate-coiling mill for titanium alloy plate rolling,and then thickness precision is found consistently to be within 3%,exceeding the precision of traditional setting models with a self-learning method based on a large number of stable rolling data.Excellent application performance is obtained.The proposed research provides a set of high-precision thickness setting models which are well adapted to the characteristics of titanium alloy plate cold rolling without tension.
文摘Microfiltration technique was used to measure white blood cell deformability (WCD) in one hundred and thirty patients with non-nsulin-dependent diabetes mellitus (NIDDM or type Ⅱ). It was found that WCD of the diabetics was significantly decreased compared with fifty controls (P<0.01) and further reduced with the rise of levels of plasma fibrinogen (Fg), plasma lipid, hemoglobin Ale (HbAlc) and fasting blood glucose (FBG), and also with the increase of age, the duration of diabetes, and the reduction of plasma magnesium concentration. It was shown that the decrease of WCD in diabetes mellitus was closely related to the degree of metabolic disturbance of the failure of diabetic control.
