Labview在微循环流速测量中的应用

探讨了一个基于Labview图像处理模块的微循环流速测量软件系统的构建,并提供了一种无须跟踪同一个血细胞来测量微循环血细胞流速的方法。     

纤维质燃料填充床正向阴燃传播特性的数值模拟

Based on a three-step kinetic mechanism, a one-dimensional, time dependent, numerical model is presented forthe smoldering propagation in a horizontally packed bed of cellulosic material. The kinetic processes include pyrolysis andoxidation degradation of fuel and oxidation of char. Heat transfer between solid and gas is taken into account, and the diffusioncoefficient varies with the temperature. Radiative heat transfer is included by using the diffusion approximation. The effectsof airflow velocity and oxygen concentration are simulated on the smoldering velocity and the averaged maximum temperatureof smoldering fuel. The results indicate that the spread rate varies linearly with increasing airflow velocity, and the inlet airvelocity has little effect on the maximum temperature. The evolutions of gas species and solid compositions are predicted.The effects of frequency factors (A1, A2 and A3) are analyzed. Simulations show that the smoldering spread rate increaseswith increasing A2 (fuel oxidation), but decreases with A1 (fuel pyrolysis) and A3 (char oxidation).     

磁场作用下的磁性流体行波泵研究

磁场作用下的磁性流体行波泵研究是行波泵设计的基础。通过分析了行波磁场作用下的磁性流体的运动方程,从而进一步推导了行波磁场作用下的磁性流体的速度方程、旋转速度方程和单位时间内的流量方程,并通过实验进行了验证。研究表明：行波磁场作用下的磁性流体会产生流动现象;行波磁场作用下的磁性流体流量与磁极旋转的角度有直接关系,磁极旋转的角度越大,其流量也越多;行波磁场的强弱对磁性流体流量也会产生影响,磁场越强,其流量越大;行波磁场的频率只能影响磁性流体的流速,对流量不产生任何直接影响。     

How students conceptualize grade‐based acceleration in inclusive settings

Despite extensive research supporting educational acceleration for students with high academic ability, some psychologists, counselors, and educators express concerns about accelerative interventions. Such concerns often hinge on uncertainty about social acceptance, even in inclusive education settings. Research on acceleration has consistently shown benefits for students with high ability; however, there is a lack of research about grade‐based acceleration in inclusive schools. This study engaged two groups of students in group concept mapping processes to examine how they conceptualized beliefs about grade‐based acceleration in inclusive schools. First, 26 students in inclusive classes generated beliefs about grade‐based acceleration. Then they, and a group of 14 students with high ability, structured the data by sorting and rating a synthesized list of the generated beliefs. We analyzed the sorted data using multidimensional scaling and hierarchical cluster analysis. The resultant cluster maps revealed some differences and some similarities in the ways that the two groups of students conceptualized beliefs about educational acceleration. Practical implications are discussed.     

跳远助跑专项技术的分析

本主要从几个方面阐述了助跑专项术特点要求，并说明了助跑是跳远运动中最重要的一环。     

基于物理核心素养的“速度变化的快慢——加速度”教学设计

以"加速度"一节为例进行教学设计,教学过程包含概念引入、概念形成、概念应用、概念反馈四个阶段。从Dislab传感器实验入手,运用了类比、推理、综合分析、归纳总结等多种科学探究方法,旨在让学生深刻的理解并牢固掌握加速度这一重要概念,培养其物理学科核心素养,为学生的终生发展奠定基础。     

高压静电除尘实验研究

研究了静电电压对除尘效率的影响，实验证明，在其他条件不变的情况下，除尘效率与电压呈正相关（R2=0．9753），随着电压的增加，有效驱进速度也增加，说明可以通过控制电压来控制除尘效率，达到最优化的工况条件，最大除尘效率η为99．4％。     

加速度瞬心问题的讨论

利用加速度瞬心的概念，推导了加速度瞬心相对静系、动系的坐标公式及任一点相对加速度瞬心的加速度表达式。     

相对性原理与真空对称性破缺

整体规范变换中场的状态函数与坐标系的匀速直线运动相对应，定域规范变换中场的状态函数与坐标系的加速运动相对应。规范场的引入，实质是引进一种性质相同的相互作用，抵消原有场的作用，构造一个新的惯性空间，使自然规律不变，相对性原理成立。弱电统一理论中，与温伯格规范场对应的时空空间是不均匀和不对称的。希格斯机制──真空自发破缺，是为了消除这种时空不均匀和不对称，并保证相对性原理成立。     

模块化的无刷直流电机PWM调速实验系统

针对市场上现有的无刷直流电机调速教学实验仪器不能自主构建控制方式和参数整定方法等不足之处,采用两两导通星型三相6状态工作方式,设计了用逻辑控制芯片控制的无刷直流电机PWM（pulsewidth modulation）调速实验系统,实现了BLDCM的开环机械特性和双闭环控制调速测试等实验。