高职院校误差理论与数据处理课程教学改革探索

误差理论与数据处理是高职院校测控类以及仪表类等专业的专业技术基础课程.本文按照教育部关于职业教育教学改革精神,根据高职院校学生的特点,以学生的应用能力和综合素质为主要培养目标,针对实际教学中存在的问题,主要从教学内容、教学方法以及考核方式三个方面对高职院校误差理论与数据处理课程的教学进行改革探索.     

基于空间统计学的湖南武陵山片区贫困村空间关联特征与扶贫开发空间格局优化研究

选取湖南武陵山片区内的贫困村为研究对象,并为其建立地理数据库,采用空间自相关等空间统计学工具研究区域内贫困村的空间关联、集聚特征,为优化扶贫开发空间格局提供决策建议.     

基于微课的独立学院大学英语听说教学应用模式探索

微课作为新型的教学手段,教育界对其应用的关注度越来越高.从微课的特点入手,结合独立学院大学英语听说教学的现状,以石家庄铁道大学四方学院电气专业为例,探讨微课在非英语专业学生听说课上的应用模式,旨在为改善大学英语听说课的教学现状提供一些思路.     

应用型本科院校大学章程比较研究——基于安徽行知联盟高校章程文本的实证分析

作为大学总揽全局、牵引各方的总抓手,大学章程是全面推进依法治校的关键.从安徽行知联盟中的12所应用型本科院校切入,通过对大学章程文本进行比较分析揭示章程建设存在内容结构同质化、条文表述模糊,可操作性差、缺乏有效的监督机制以及程序纰漏等问题,只有真正树立章程理念,完善章程文本建设,运行有效的监督机制和规范的制定程序才能从根本上推进大学章程的建设工作.     

我国不同等级女子足球裁判员临场执法心理活动的定量研究

借鉴李可可等人设计的篮球裁判员临场执法心理活动问卷,制定一套适合评定足球裁判员临场执法心理活动的问卷。通过该问卷从心理印象因素、平衡心理因素、动机强度因素等3个方面对我国3个等级的92名女子足球裁判员的心理活动进行问卷调查,为提高我国年轻女足裁判员临场执法心理适应能力做参考。     

Development of a markerless optical motion capture system for daily use of training in swimming

The main objective of this research was to develop a markerless optical motion capture system that can be used for daily use in swimming training. The butterfly stroke was targeted since it is considered bilaterally symmetric in motion. The system consisted of a segmentation process to obtain the participant’s silhouettes and a matching process to estimate the pose of the participant. A variable thresholding method was used to extract the silhouettes to solve non-uniform illumination in the recorded swimming video. Prior to the matching process, the human body was modeled as a series of nine segments to help the matching process. The model was then mapped so that it aligned with the silhouettes, which were investigated by similarity of intensity value. To minimize the degree of freedom in image matching, the available joint motion in the swimming human simulation model was used as a priori information for kinematics data of the swimming motion. As a result, the rotation angle’s correlation coefficients between the references and result of the matching process were around 0.95 for trunk, thigh, shank, upper arm, forearm, hand and 0.78 for head, hip and foot. The rotation angle and the velocity of the center of mass were put into the swimming human simulation model for a dynamics analysis. The simulation results show that the velocity obtained in the experiment corresponded to the fluid force exerted on the lower and upper limbs. Consequently, the proposed system of obtaining the joint motion of the butterfly stroke is suitable for daily training and coaching.     

The effect of acceleration signal processing for head impact numeric simulations

Brain injury research in sport employs a variety of physical models equipped with accelerometers. These acceleration signals are commonly processed using filters. The purpose of this research was to determine the effect of applying filters with different cutoff frequencies to the acceleration signals used as input for finite element modeling of the brain. Signals were generated from reconstructions of concussion events from American football and ice hockey in the laboratory using a Hybrid III headform. The resulting acceleration signals were used as input for the University College Dublin Brain Trauma Model after being processed with filters. The results indicated that using a filter with a cutoff of 300 Hz or higher had little effect on the resulting strain measures. In some cases there was some effect of the filters on the peak linear (8–30g) and rotational measures (1000–4000 rad/s²), but little effect on the finite element strain result (approximately 2–6 %). The short duration and high magnitude accelerations, such as the puck impact, were most affected by the cutoff frequency of different filters.     

Designing,building, measuring,and testing a constant equivalent fall height terrain park jump

Previous work has presented both a theoretical foundation for designing terrain park jumps that control landing impact and computer software to accomplish this task. US ski resorts have been reluctant to adopt this more engineered approach to jump design, in part due to questions of feasibility. The present study demonstrates this feasibility. It describes the design, construction, measurement, and experimental testing of such a jump. It improves on the previous efforts with more complete instrumentation, a larger range of jump distances, and a new method for combining jumper- and board-mounted accelerometer data to estimate equivalent fall height, a measure of impact severity. It unequivocally demonstrates the efficacy of the engineering design approach, namely that it is possible and practical to design and build free style terrain park jumps with landing surface shapes that control for landing impact as predicted by the theory.     

既有体育场馆PPP项目收益系统仿真研究:考虑交易成本

可持续的项目收益是实现体育场馆PPP项目成功运营的重要条件.基于系统工程和交易成本经济学,构建了考虑交易成本的既有体育场馆PPP项目收益系统模型.以重庆某体育场馆为例,利用系统动力学和模糊数学方法对既有体育场馆PPP项目收益系统的关键参数进行模拟仿真,讨论了特定折现率水平下特许经营期、体育服务特许价格、体育活动人数以及商业服务价格变化对既有体育场馆PPP项目收益系统的影响效果及其变化规律,为体育场馆PPP项目中政府与社会资本投资者投资决策与动态管理提供参考.     

City Texture Hutong and Siheyuan in Beijing （Ⅰ）

People will always complain about the dreary air, clouds of dust and few changes of life in Beijing when they are about to leave the city after living there for a couple of years. However, all of these people will miss the city and hope to go back there after living in other places for a year or so, with a wave of strong nostalgia coming over them.