基于团队的学习(Team Based Learning,TBL)是近几年出现在医学教育领域的一种新兴的教学方法,因其能充分的调动学生学习的积极性、培养批判性思维,而逐渐被应用到医学相关专业学科的教学中,收到了良好的效果。然而,目前国内对于TBL的研...基于团队的学习(Team Based Learning,TBL)是近几年出现在医学教育领域的一种新兴的教学方法,因其能充分的调动学生学习的积极性、培养批判性思维,而逐渐被应用到医学相关专业学科的教学中,收到了良好的效果。然而,目前国内对于TBL的研究与应用不够充分,值得国内医学教育者继续深入的探讨与研究。文章主要介绍了TBL教学模式理念和主要的实施方法,并介绍了国内、外的相关研究进展,供国内医学教育者在教学中开展TBL教学提供借鉴。展开更多
Transient electronics has attracted interest as an emerging technology to solve electronic-waste problem,due to its physically vanishing ability in solution.Here in this work,we demonstrate a flexible and degradable t...Transient electronics has attracted interest as an emerging technology to solve electronic-waste problem,due to its physically vanishing ability in solution.Here in this work,we demonstrate a flexible and degradable transient resistive switching(RS) memory device with simple structure of Cu/sodium alginate(SA)/ITO.The device presents excellent RS characteristics as well as high flexibility,including low operating voltage(<1.5 V) and multilevel RS behavior.No performance degradation occurs after bending the device 50 times.Moreover,our device can be absolutely dissolved in deionized water.The proposed SA-based transient memory device has great potential for the development of green and security memory devices.展开更多
To get the movement mode and driving mechanism similar to human shoulder joint,a six degrees of freedom(DOF) serial-parallel bionic shoulder joint mechanism driven by pneumatic muscle actuators(PMAs)was designed.Howev...To get the movement mode and driving mechanism similar to human shoulder joint,a six degrees of freedom(DOF) serial-parallel bionic shoulder joint mechanism driven by pneumatic muscle actuators(PMAs)was designed.However,the structural parameters of the shoulder joint will affect various performances of the mechanism.To obtain the optimal structure parameters,the particle swarm optimization(PSO) was used.Besides,the mathematical expressions of indexes of rotation ranges,maximum bearing torque,discrete dexterity and muscle shrinkage of the bionic shoulder joint were established respectively to represent its many-sided characteristics.And the multi-objective optimization problem was transformed into a single-objective optimization problem by using the weighted-sum method.The normalization method and adaptive-weight method were used to determine each optimization index's weight coefficient;then the particle swarm optimization was used to optimize the integrated objective function of the bionic shoulder joint and the optimal solution was obtained.Compared with the average optimization generations and the optimal target values of many experiments,using adaptive-weight method to adjust weights of integrated objective function is better than using normalization method,which validates superiority of the adaptive-weight method.展开更多
文摘基于团队的学习(Team Based Learning,TBL)是近几年出现在医学教育领域的一种新兴的教学方法,因其能充分的调动学生学习的积极性、培养批判性思维,而逐渐被应用到医学相关专业学科的教学中,收到了良好的效果。然而,目前国内对于TBL的研究与应用不够充分,值得国内医学教育者继续深入的探讨与研究。文章主要介绍了TBL教学模式理念和主要的实施方法,并介绍了国内、外的相关研究进展,供国内医学教育者在教学中开展TBL教学提供借鉴。
基金Project supported by the Fund from the Ministry of Science and Technology of China(Grant No.2018YFE0118300)the National Natural Science Foundation of China(Grant Nos.11974072,51902048,61774031,and 61574031)+3 种基金the“111”Project,China(Grant No.B13013)the China Postdoctoral Science Foundation,China(Grant No.2019M661185)the Fundamental Research Funds for the Central Universities,China(Grant No.2412019QD015)Science Fund from the Jilin Province,China(Grant No.JJKH20201163KJ)。
文摘Transient electronics has attracted interest as an emerging technology to solve electronic-waste problem,due to its physically vanishing ability in solution.Here in this work,we demonstrate a flexible and degradable transient resistive switching(RS) memory device with simple structure of Cu/sodium alginate(SA)/ITO.The device presents excellent RS characteristics as well as high flexibility,including low operating voltage(<1.5 V) and multilevel RS behavior.No performance degradation occurs after bending the device 50 times.Moreover,our device can be absolutely dissolved in deionized water.The proposed SA-based transient memory device has great potential for the development of green and security memory devices.
基金the National Natural Science Foundation of China(NO.51405229)the Natural Science Foundation of Jiangsu Province of China(Nos.BK20151470 and BK20130796)
文摘To get the movement mode and driving mechanism similar to human shoulder joint,a six degrees of freedom(DOF) serial-parallel bionic shoulder joint mechanism driven by pneumatic muscle actuators(PMAs)was designed.However,the structural parameters of the shoulder joint will affect various performances of the mechanism.To obtain the optimal structure parameters,the particle swarm optimization(PSO) was used.Besides,the mathematical expressions of indexes of rotation ranges,maximum bearing torque,discrete dexterity and muscle shrinkage of the bionic shoulder joint were established respectively to represent its many-sided characteristics.And the multi-objective optimization problem was transformed into a single-objective optimization problem by using the weighted-sum method.The normalization method and adaptive-weight method were used to determine each optimization index's weight coefficient;then the particle swarm optimization was used to optimize the integrated objective function of the bionic shoulder joint and the optimal solution was obtained.Compared with the average optimization generations and the optimal target values of many experiments,using adaptive-weight method to adjust weights of integrated objective function is better than using normalization method,which validates superiority of the adaptive-weight method.
