For the purpose of engineering development for a new 8-step speed automatic transmission,a simplified dynamic model for this gearbox was established and key parameters which affected the shift quality were analyzed.Ai...For the purpose of engineering development for a new 8-step speed automatic transmission,a simplified dynamic model for this gearbox was established and key parameters which affected the shift quality were analyzed.Aiming at four different shift types,the ideal characteristics of shift clutch and engine control were set up.By using torque estimation method,PI slip control algorithm and engine coordinated control principle,the control model and transmission controller were well developed for three shift phases which included rapid-fill phase,torque phase and inertia phase.The testing environment on the rig and prototype vehicle level was built and the testing results obtained in ultimate condition could verify the accuracy and feasibility of this shift control strategy.The peak jerk during shift process was controlled within ±2 g/s where the smooth gearshift was obtained.The development proposal and algorithm have a high value for engineering application.展开更多
Objective:To explore the clinical application effect of self-designed automatic constant temperature moxibustion box.Methods:From June 2016 to January 2017,150 patients with neck,shoulder,back and leg pain admitted to...Objective:To explore the clinical application effect of self-designed automatic constant temperature moxibustion box.Methods:From June 2016 to January 2017,150 patients with neck,shoulder,back and leg pain admitted to our hospital were treated with moxibustion under the informed consent of the patients.The patients were randomly divided into control group and observation group,75 cases each.The group used traditional moxibustion box for moxibustion treatment,and the observation group used automatic constant temperature moxibustion box for moxibustion treatment for 15 days.After the treatment,the patient's safety,comfort,satisfaction and adverse reactions were compared,and the results were analyzed using SPSS 20 statistical software.Results:The comfort and satisfaction in study group were all superior to that of control group,with statistically significant difference(P<0.01).For patient's safety,the ratio of patients suffered from scald in study and control groups was 5.3/100 and 0,respectively.Conclusions:It is of great significance for improving clinical efficacy and preventing medical risks.It is worthy of clinical application.展开更多
基金Project(51105017) supported by the National Natural Science Foundation of ChinaProject(2011BAG09B00) supported by the National Science and Technology Support Program of ChinaProject(2010DFB80020) supported by the Technology Major Project of the Ministry of Science and Technology of China
文摘For the purpose of engineering development for a new 8-step speed automatic transmission,a simplified dynamic model for this gearbox was established and key parameters which affected the shift quality were analyzed.Aiming at four different shift types,the ideal characteristics of shift clutch and engine control were set up.By using torque estimation method,PI slip control algorithm and engine coordinated control principle,the control model and transmission controller were well developed for three shift phases which included rapid-fill phase,torque phase and inertia phase.The testing environment on the rig and prototype vehicle level was built and the testing results obtained in ultimate condition could verify the accuracy and feasibility of this shift control strategy.The peak jerk during shift process was controlled within ±2 g/s where the smooth gearshift was obtained.The development proposal and algorithm have a high value for engineering application.
文摘Objective:To explore the clinical application effect of self-designed automatic constant temperature moxibustion box.Methods:From June 2016 to January 2017,150 patients with neck,shoulder,back and leg pain admitted to our hospital were treated with moxibustion under the informed consent of the patients.The patients were randomly divided into control group and observation group,75 cases each.The group used traditional moxibustion box for moxibustion treatment,and the observation group used automatic constant temperature moxibustion box for moxibustion treatment for 15 days.After the treatment,the patient's safety,comfort,satisfaction and adverse reactions were compared,and the results were analyzed using SPSS 20 statistical software.Results:The comfort and satisfaction in study group were all superior to that of control group,with statistically significant difference(P<0.01).For patient's safety,the ratio of patients suffered from scald in study and control groups was 5.3/100 and 0,respectively.Conclusions:It is of great significance for improving clinical efficacy and preventing medical risks.It is worthy of clinical application.
