In order to analyze the kinematic performances of elliptic-gear & eccentric slider-crank & uniform-pitch screw weft-insertion mechanism proposed by us,kinematic mathematic models of the mechanism were establis...In order to analyze the kinematic performances of elliptic-gear & eccentric slider-crank & uniform-pitch screw weft-insertion mechanism proposed by us,kinematic mathematic models of the mechanism were established,and an aided analytic software was compiled.Influences of some important parameters on the kinematic characteristics of the mechanism were analyzed.A group of preferable parameters were obtained according to the software and some requirements.Comparisons of kinematic performances were made between the proposed mechanism and the variable-pitch screw insertion mechanism of C401 rapier loom manufactured by Vamatex Corp in Italy.The results show that the proposed mechanism can meet the requirements of inserting wefts.展开更多
Strategy of the shaft eccentricity is introduced to enhance the mixing characteristics in a flat bottomed cylindrical vessel without baffles. The mixing is ensured by a six-curved blade impeller. Three solutions which...Strategy of the shaft eccentricity is introduced to enhance the mixing characteristics in a flat bottomed cylindrical vessel without baffles. The mixing is ensured by a six-curved blade impeller. Three solutions which are models of food emulsions are used as working fluids. These solutions have a shear thinning behavior modeled by the power-law. The effects of fluid properties, stirring rates, impeller rotational direction and impeller eccentricity on the 3D flow fields and power consumption are investigated. Three values of impeller eccentricity are considered, namely 0%, 24% and 48% of the vessel diameter. It is found that the opposite clockwise rotational direction reduces the power consumption, compared with the clockwise rotational direction. Also, the obtained results show that an impeller placed at an eccentric position between 24% and 48% of the vessel diameter and at the third of the vessel height may ensure the best mixing characteristics.展开更多
Taking a concrete frame supporting space structure as the research object,we systematically studied its lateral-torsion coupling effect of reverse problems in consistent earthquake excitation.Firstly,based on its reve...Taking a concrete frame supporting space structure as the research object,we systematically studied its lateral-torsion coupling effect of reverse problems in consistent earthquake excitation.Firstly,based on its reverse forms and features,we put forward a mechanical analysis model(flexibility layer model) and a calculation method using the response spectrum method and the weighted average method,and verified their validity and feasibility using case analysis.The result shows that the translation displacement change trend of the space structure is basically the same whether reverse exists in the supporting structure or not,but the supporting structure torsion has an effect on the displacement with a relative increase of 10%.展开更多
Objective:To observe the clinical efcacy and safety of external application of Rupi Sanjie Xiaotong Plaster(乳癖散结消痛膏,RPSJXTP)in treating breast hyperplasia of liver stagnation and phlegm coagulation pattern.Meth...Objective:To observe the clinical efcacy and safety of external application of Rupi Sanjie Xiaotong Plaster(乳癖散结消痛膏,RPSJXTP)in treating breast hyperplasia of liver stagnation and phlegm coagulation pattern.Methods:Totally 72 female patients with breast hyperplasia of liver stagnation and phlegm coagulation pattern admitted to the First Hospital Affiliated to Henan University of Chinese Medicine were enrolled by ran-domized,single-blind,placebo-controlled research method,and were divided into the treatment group(36 ca-ses)and the control group(36 cases)according to computer random number method.The treatment group were given RPSJXTP,while the control group were gi ven placebo plaster.The course of treatment in both groups was 8 weeks.The breast pain score,breast color ultrasound score,lump score,depression score,and Chinese medicine syndrome score were compared between the two groups at different times.The levels of estra-diol(E_(2)),progesterone(P)and pituitary prolactin(PRL)were detected and the adverse reactions of two groups were observed during the treatment of both groups.Results:Before treatment,there was no significant difference in total breast pain score,breast color ultrasound score,lump score,depression score and levels of serum P,E_(2)and PRL between the two groups(P>0.05);compared with previous treatment,the total breast pain score,breast color ultrasound score,lump score,and depression score significantly decreased in the treat-ment group(P<0.05),and the total breast pain score and depression score of the control group significantly declined(P<0.05);compared with control group,the total breast pain score,breast color ultrasound score,lump score,and depression score significantly decreased after treatment in the treatment group(P<0.05).The improvement rate of Chinese medicine syndromes and the clinical efective rate in the treatment group were higher than those in the control group(P<0.05).There were no serious systemie adverse reactions during the treatment in both groups.Local pruritus occurred in 3 cases in the treatment group and 1 case in the control group.Conclusion:RPSJXTP is effective in treating breast hyperplasia of liver stagnation and phlegm coagula-tion pattern.It can effectively relieve the breast pain which will not recur after stopping of drug use,which can reduce the color ultrasound score,lump score,and depression score of the patients and improve Chinese medi-cine syndromes without serious adverse reactions.展开更多
In this paper, we propose a new criterion, named PICa, to simultaneously select explanatory variables in the mean model and variance model in heteroscedastic linear models based on the model structure. We show that th...In this paper, we propose a new criterion, named PICa, to simultaneously select explanatory variables in the mean model and variance model in heteroscedastic linear models based on the model structure. We show that the new criterion can select the true mean model and a correct variance model with probability tending to 1 under mild conditions. Simulation studies and a real example are presented to evaluate the new criterion, and it turns out that the proposed approach performs well.展开更多
基金National Natural Science Foundation of China(No.50875243)Zhejiang Technique Innovation Group of Modern Textile Machinery,China(No.2009R50018)Foundation of New Textile Research & Development Emphasised Laboratory of Zhejiang Province,China(No.2009FZD004)
文摘In order to analyze the kinematic performances of elliptic-gear & eccentric slider-crank & uniform-pitch screw weft-insertion mechanism proposed by us,kinematic mathematic models of the mechanism were established,and an aided analytic software was compiled.Influences of some important parameters on the kinematic characteristics of the mechanism were analyzed.A group of preferable parameters were obtained according to the software and some requirements.Comparisons of kinematic performances were made between the proposed mechanism and the variable-pitch screw insertion mechanism of C401 rapier loom manufactured by Vamatex Corp in Italy.The results show that the proposed mechanism can meet the requirements of inserting wefts.
文摘Strategy of the shaft eccentricity is introduced to enhance the mixing characteristics in a flat bottomed cylindrical vessel without baffles. The mixing is ensured by a six-curved blade impeller. Three solutions which are models of food emulsions are used as working fluids. These solutions have a shear thinning behavior modeled by the power-law. The effects of fluid properties, stirring rates, impeller rotational direction and impeller eccentricity on the 3D flow fields and power consumption are investigated. Three values of impeller eccentricity are considered, namely 0%, 24% and 48% of the vessel diameter. It is found that the opposite clockwise rotational direction reduces the power consumption, compared with the clockwise rotational direction. Also, the obtained results show that an impeller placed at an eccentric position between 24% and 48% of the vessel diameter and at the third of the vessel height may ensure the best mixing characteristics.
基金Funded by the Research on Damage Mechanism of the Spatial Dome-Reinforced Concrete Structures and Reduce Vibration System in West Area (No. 51068019)
文摘Taking a concrete frame supporting space structure as the research object,we systematically studied its lateral-torsion coupling effect of reverse problems in consistent earthquake excitation.Firstly,based on its reverse forms and features,we put forward a mechanical analysis model(flexibility layer model) and a calculation method using the response spectrum method and the weighted average method,and verified their validity and feasibility using case analysis.The result shows that the translation displacement change trend of the space structure is basically the same whether reverse exists in the supporting structure or not,but the supporting structure torsion has an effect on the displacement with a relative increase of 10%.
文摘Objective:To observe the clinical efcacy and safety of external application of Rupi Sanjie Xiaotong Plaster(乳癖散结消痛膏,RPSJXTP)in treating breast hyperplasia of liver stagnation and phlegm coagulation pattern.Methods:Totally 72 female patients with breast hyperplasia of liver stagnation and phlegm coagulation pattern admitted to the First Hospital Affiliated to Henan University of Chinese Medicine were enrolled by ran-domized,single-blind,placebo-controlled research method,and were divided into the treatment group(36 ca-ses)and the control group(36 cases)according to computer random number method.The treatment group were given RPSJXTP,while the control group were gi ven placebo plaster.The course of treatment in both groups was 8 weeks.The breast pain score,breast color ultrasound score,lump score,depression score,and Chinese medicine syndrome score were compared between the two groups at different times.The levels of estra-diol(E_(2)),progesterone(P)and pituitary prolactin(PRL)were detected and the adverse reactions of two groups were observed during the treatment of both groups.Results:Before treatment,there was no significant difference in total breast pain score,breast color ultrasound score,lump score,depression score and levels of serum P,E_(2)and PRL between the two groups(P>0.05);compared with previous treatment,the total breast pain score,breast color ultrasound score,lump score,and depression score significantly decreased in the treat-ment group(P<0.05),and the total breast pain score and depression score of the control group significantly declined(P<0.05);compared with control group,the total breast pain score,breast color ultrasound score,lump score,and depression score significantly decreased after treatment in the treatment group(P<0.05).The improvement rate of Chinese medicine syndromes and the clinical efective rate in the treatment group were higher than those in the control group(P<0.05).There were no serious systemie adverse reactions during the treatment in both groups.Local pruritus occurred in 3 cases in the treatment group and 1 case in the control group.Conclusion:RPSJXTP is effective in treating breast hyperplasia of liver stagnation and phlegm coagula-tion pattern.It can effectively relieve the breast pain which will not recur after stopping of drug use,which can reduce the color ultrasound score,lump score,and depression score of the patients and improve Chinese medi-cine syndromes without serious adverse reactions.
基金supported by National Natural Science Foundation of China (Grant No.10971007)Beijing Natural Science Fund (Grant No. 1072003)Science Fund of Beijing Education Committee
文摘In this paper, we propose a new criterion, named PICa, to simultaneously select explanatory variables in the mean model and variance model in heteroscedastic linear models based on the model structure. We show that the new criterion can select the true mean model and a correct variance model with probability tending to 1 under mild conditions. Simulation studies and a real example are presented to evaluate the new criterion, and it turns out that the proposed approach performs well.
