等厚干涉法测量应用实验研究

利用等厚干涉测量头发丝的直径,可以训练学生的实验操作技巧,加深对实验原理的掌握,丰富了实验内容,避免了实验结果的千篇一律,同时激发了学生的实验兴趣.     

EPQ量表与哈萨克族大学生的神经类型特征

运用EPQ量表对哈萨克族大学生的神经类型进行测量评价研究,为探讨少数民族身心健康和神经类型特征提供科学的理论参考;为推动各民族传统体育项目的发展提出参照的心理统计量指标数据.     

A Statistical Method for Analysis of Technical Data of a Badminton Match Based on 2-D Seriate Images

The use of computer vision technology to collect and analyze statistics during badminton matches or training sessions can be expected to provide valuable information to help coaches to determine which tactics should be used by a player in a given game or to improve the player＇s tactical training. A method based on 2-D seriate images by which statistical data of a badminton match can be obtained is presented. Image capture and analysis were performed synchronously using a multithreading technique. The regions of movement in the images were detected using a temporal difference method, and the trajectories of the movement regions were analyzed using sedate images. The shuttlecock trajectory was extracted from all detected trajectories using various characteristic parameters. The stroke type was determined by comparing the shuttlecock trajectory data with a set of stroke definition data. The algorithm was tested at a training center, and the results were compared with baseline data obtained by expert visual inspection using four video samples, which included approximately 10 000 frames. The shuttlecock trajectory and stroke type were detected correctly in almost 100% of the analyzed video sequences. The average speed of the automated analysis was approximately 40 frames/s, indicating that the method can be used for real-time analysis during a badminton match. The system is convenient for use by a sports coach.     

A thermal insulation method for a piezoelectric transducer

This study deals with the sources of signal distortion of a piezoelectric transducer heated by measured gas flow. These signal distortions originate from both unloading of preload on a piezocrystal because of expansion of a diaphragm in the test apparatus and the pyroelectric effect of a heated piezoelectric crystal. A plastic film on the diaphragm of the transducer can effectively insulate the diaphragm and the piezocrystal within transducer from heating by gas flow, eliminating the sources of distortion. A method for evaluating the thickness of the film is proposed.     

电阻应变测量技术在压力容器检验中的应用

介绍了电阻应变测量技术的测试原理和测试方法，并结合化工企业对压力容器检验的技术要求，应用电阻应变测量技术对典型压力容器作出了应力分析和安全评定。     

提高测量精度方法探讨

测量工作是一项精而细的工作,在精度方面尤为重要,精度的高低直接决定着矿井的安全生产,因此提高测量精度,减少测量工作量是测量工作中需要研究解决的问题。文章介绍了一种在导线测量中,既能提高测量精度,又能减少工作量的方法——边角分测法。     

反映式与构成式测量模型的差异：基于TAM的实证研究

测量模型的选择是实证研究过程中的重要环节，区分反映式测量模型和构成式测量模型是正确构建管理理论的基础.在分析反映式和构成式两种测量模型差异的基础上，以技术采纳模型为例，通过对7次共1951份实际调查数据的分析，利用偏最小二乘法的结构方程模型，实证比较了两种测量模型在不同的样本规模、不同的研究情境和不同调查时间下外部效度和对内生潜变量解释能力上的差异.研究结果表明反映式测量模型具有稳定的外部效度，构成式测量模型的外部效度受到样本规模、研究情境和调查时间的影响；在因变量解释能力方面，构成式测量模型比反映式测量模型强的假设没有得到支持，即使当构成式测量模型误设为反映式测量模型时，其因变量解释能力也不一定显著增强.     

一种快速高精度测频方法

介绍了用８０３１进行快速，宽频带，高精度的测频方法，分析了测频的基本原理，并给出了硬件框图及系统流程图。     

电工实验测量误差的分析

分析在电工实验测量时产生测量误差的原因及减小测量误差的方法，正确估计测量误差和有效数字的正确表示。     

数字稳定单元通用测试系统研制

本文从数字稳定单元的工作原理出发，研制了一套ＤＳＵ的通用测试系统，对雷达测试具有重要意义。