The Effects of a Functional Three-dimensional (3D) Printed Knee Joint Simulator in Improving Anatomical Spatial Knowledge

In recent decades, three-dimensional (3D) printing as an emerging technology, has been utilized for imparting human anatomy knowledge. However, most 3D printed models are rigid anatomical replicas that are unable to represent dynamic spatial relationships between different anatomical structures. In this study, the data obtained from a computed tomography (CT) scan of a normal knee joint were used to design and fabricate a functional knee joint simulator for anatomical education. Utility of the 3D printed simulator was evaluated in comparison with traditional didactic learning in first-year medical students (n = 35), so as to understand how the functional 3D simulator could assist in their learning of human anatomy. The outcome measure was a quiz comprising 11 multiple choice questions based on locking and unlocking of the knee joint. Students in the simulation group (mean score = 85.03%, ±SD 10.13%) performed significantly better than those in the didactic learning group, P < 0.05 (mean score = 70.71%, ±SD 15.13%), which was substantiated by large effect size, as shown by a Cohen’s d value of 1.14. In terms of learning outcome, female students who used 3D printed simulators as learning aids achieved greater improvement in their quiz scores as compared to male students in the same group. However, after correcting for the modality of instruction, the sex of the students did not have a significant influence on the learning outcome. This randomized study has demonstrated that the 3D printed simulator is beneficial for anatomical education and can help in enriching students’ learning experience.     

旋转电磁场的理论解析及数值模拟

本文运用电磁场的基本理论,对在时变磁场中的旋转半固态浆料受力状态进行了理论解析,并建立单极对旋转电磁搅拌器数值模型,应用有限元软件ANSYS进行数值模拟,模拟了电磁搅拌器内的电磁感应强度分布和电磁力分布。     

Fresnel 衍射的计算机模拟演示

基于 Huygens-Fresnel 衍射积分,利用 Hankel 变换算法及球面波因子处理方法,在普通 PC上使用 MFC 编程较好地实现了 Fresnel 衍射的计算机模拟演示。演示中,Fresnel 衍射的输入光强剖面分布、输出光强剖面分布和输出光强影射图样分别随光的传输距离和波长及输入光束半腰的改变而变化,光的传输距离和波长及输入光束半腰分别由三个滚动条分别控制。     

基于SWAT模型的喀斯特地区流域径流模拟研究——以赤水河流域上游为例

为探索SWAT模型在喀斯特地区径流模拟中的实用性,以赤水河流域为例,在GIS、RS等技术的支持下,应用SWAT模型利用2000年至2010年的逐日气象数据与逐月径流量数据对流域上游地区月径流进行了模拟.结果表明:率定期的决定系数R2和Nash效率系数Ens分别为0.80与0.75,验证期的决定系数R2和Nash效率系数Ens分别为0.81与0.77,模型的实用性较好,SWAT模型适用于喀斯特地区河流径流的模拟.模型结果可为流域上游水资源生态补偿、流域水资源评价、水资源管理及流域水土保持提供依据.     

Q235钢单层板抗侵彻特性数值模拟研究

采用ABAQUS/EXPLICIT对弹体撞击单层金属板的过程进行了数值模拟研究。数值模拟获得的结果和实验结果基本一致,验证了数值模拟模型和参数的有效性。并在数值模拟的基础上,分析了靶板的失效模式。     

《治安案件查处》课程模拟实训教学初探

《治安案件查处》课程具有与公安业务联系紧密、实战技能要求高等特点,正是因此,加强实践教学环节始终是《治安案件查处》课程教学改革的重点。本文试就实践教学环节中常采用的模拟实训展开研究,并针对目前模拟实训中存在的问题,提出完善设想。     

“仿真企业”班级管理中“虚拟工资”虚实结合的探索

本文是在"仿真企业"班级管理实施过程中,针对"虚拟工资"存在的一些弊端,从"虚拟工资"虚实结合实施的过程、形式,探讨其虚实结合的有效性。     

基于AMESim的液压助力转向系统仿真研究

介绍了液压助力转向系统的基本组成和工作原理,为解决传递函数法在液压助力转向系统(HPS)仿真建模中的局限性,运用仿真软件AMESim建立了机液耦合的仿真模型。仿真分析了HPS系统中扭杆刚度、液压缸活塞直径、系统供油量三者对齿条位移动态响应的影响。结果表明:减小扭杆刚度对系统的动态响应影响不大,而增大液压缸活塞直径和系统供油量对其影响较大。仿真结果为HPS系统的设计和优化提供了理论依据。     

《光学》实验仿真及可视化教学研究--以“牛顿环干涉”为例

运用Matlab软件构建了可独立运行、囊括多个经典光学实验的仿真平台。本文以“牛顿环干涉”为例,系统介绍了仿真功能,并探索《光学》实验的可视化教学模式。构建的《光学》仿真平台其物理现象突出、操作性强,可极大提高学习兴趣及教学质量。     

TIG堆焊熔深模糊控制系统设计与仿真

研究TIG弧堆焊熔深控制方法,在分析TIG焊接特点和实际焊接过程的基础上,设计以熔深的偏差和偏差变化率为输入变量,焊接电流的变化量为输出变量的模糊控制器.并对控制器进行了仿真和实验验证.结果表明,控制器可以在5秒内达到稳定状态,熔深满足实际生产要求,设计的控制系统具有良好的控制效果.