利用慧鱼教具及创意组合模型设计自动立式钻铣床   总被引：2，自引：0，他引：2  

田小军  任宏涛 《洛阳工业高等专科学校学报》2001,11(4):18-20

介绍了慧鱼创意组合模型模拟机床设计及控制的思想,并且通过制作自动立式钻铣床的具体实例阐明了设计过程。经实践,该机床模型功能完善,动作可靠,可以满足教学及科研需要。  相似文献   

应用于无线监控网的压缩图像内插重建法     

黄旭红 《三明学院学报》2006,23(4):413-415

采用降低分辨率的方式进一步地降低无线监控图像存储和传输的比特数,然后,在接收端采用垂直瞬间3场调节内插法进行处理,将图像还原。在不损害图像质量的情况下重建原始图像,使得接收端能够获得较清晰监控图像。该方法比一般的线性内插法具有更好的图像质量,与自适应运动检测控制内插法、基于小波变换的自适应内插法等方法相比更简便易行。  相似文献   

累次极限与二重极限的关系研究     

赵丽琴  白云芬 《石家庄学院学报》2005,7(3):19-20

在累次极限与二重极限定义的基础上讨论了累次极限与二重极限的关系，从理论上指出累次极限不能看作二重极限特例的根本原因。  相似文献   

远程高等教育产业纵向关系与战略外包研究     

李国渝 《现代教育技术》2010,20(1):87-91,96

产品或服务转移,或者是市场外包方式,或者是通过远程教育组织系统内部纵向一体化方式,或者是纵向约束,这是现代远程教育产业生产服务提供商或机构作出的不同战略选择。这都取决于成本效益和竞争力提高的需要。  相似文献   

对跳远起跳中的速度转化技术与最佳成绩关系的研究          下载免费PDF全文

王秉彝 《惠州学院学报》2003,23(3):1-7

本文对23届奥运会12名世界级女子跳远运动员进行了研究，结果表明：跳运成绩存在最大值关系，因此，在跳运成绩达到最大值时，垂直速度和高板角增到最佳值并能使远度达到最远后，垂直速度和高板角存度增加，必然会使远度减少(见图2)．作者认为：教练员在训练中要严格掌握垂直速度的增值与最大运度的变化规律，并尽量使垂直速度和腾起角向最佳值靠拢．  相似文献   

新课程背景下中学体育课程一体化建设的实践探究     

杨矞 《当代体育科技》2020,(12):167-168

本文以新课程背景下中学体育课程一体化建设的实践探究为主要内容进行阐述,结合当下中学体育一体化教学意义、一体化体育教学实施必要性、新课程背景下中学体育课程一体化建设对策为主要依据,首先分析了是学生掌握运动技能的期待、是调整课程教学依据的根本期待、质量检测是统一的期待,其次从将体育"教""练""赛"结合起来、满足体育教学课程需求、注重强调纵向衔接及系统性、一体化提倡横向一致性把握基本规律、一体化教学要求内在统一以及稳定性、一体化课程教学注重形式多样化、一体化课程建设可以提升学生体育素养这几方面进行深入探讨和分析,其目的在于提升新课程背景下中学体育一体化课程建设效果,旨在为相关研究提供参考资料。  相似文献   

Vertical jumping biomechanical evaluation through the use of an inertial sensor-based technology     

I. Setuain  J. Martinikorena  M. Gonzalez-Izal  A. Martinez-Ramirez  M. Gómez  J. Alfaro-Adrián 《Journal of sports sciences》2016,34(9):843-851

Progress in micro-electromechanical systems has turned inertial sensor units (IUs) into a suitable tool for vertical jumping evaluation. In total, 9 men and 8 women were recruited for this study. Three types of vertical jumping tests were evaluated in order to determine if the data provided by an IU placed at the lumbar spine could reliably assess jumping biomechanics and to examine the validity of the IU compared with force plate platform recordings. Robust correlation levels of the IU-based jumping biomechanical evaluation with respect to the force plate across the entire analysed jumping battery were found. In this sense, significant and extremely large correlations were found when raw data of both IU and force plate-derived normalised force–time curves were compared. Furthermore, significant and mainly moderate correlation levels were also found between both instruments when isolated resultant forces’ peak values of predefined jumping phases of each manoeuvre were analysed. However, Bland and Altman graphical representation demonstrated a systematic error in the distribution of the data points within the mean ±1.96 SD intervals. Using IUs, several biomechanical variables such as the resultant force–time curve patterns of the three different vertical jumps analysed were reliably measured.  相似文献   

Digitally mediated value creation for non-commodity base of the pyramid producers     

《International Journal of Information Management》2021

Base of the Pyramid (BoP) producers have limited opportunities to create and capture value due to various constraints, which keeps them trapped in the vicious cycle of poverty. The emerging literature on the role of Information and Communication Technologies (ICTs) in the poverty alleviation of BoP producers focuses on ICT-enabled solutions to value capture. However, ICT-enabled solutions to create value at the BoP have received less attention. In this paper, we study the issues surrounding value creation for non-commodity BoP producers by employing a case study of four organisations in rural India. Our findings reveal two critical mechanisms for ICT-enabled value creation in a resource-constrained environment: awareness creation and repeated engagement. We find that ICT-enabled awareness creation has a positive impact on value-added, but this effect decreases as product complexity increases. We also find that ICT-mediated repeated engagement and value-added have an inverted U-shape relationship, with value-added increasing with complexity, but after a threshold, value-added declines with increase in complexity. Building on these findings, we use the lens of value co-creation and media richness perspective to contribute to theory, practice and policy by underscoring how awareness creation and repeated engagement act as key dimensions for value creation. We delineate how limitations in ICT infrastructure can be overcome in resource-constrained environments and explicate a conceptualisation of ICT-mediated joint value creation in general for spatially separated actors.  相似文献   

监督视角下公平偏好顾客创新团队的激励问题研究     

杨晨晖  张凤华  张德鹏 《科技管理研究》2015,(22)

从顾客参与企业产品创新的角度出发,分析、对比不存在横向监督和存在横向监督情况下的最优激励模型;探讨企业项目管理者在已存在横向监督机制的前提下对顾客创新团队实施纵向监督时,纵向监督与已有的横向监督实现最优组合的时候的条件;研究横向监督中的各要素(如同事压力敏感度、参与成本、团队协同系数和监督难度)对企业管理者实施纵向监督行为的影响作用;并通过算例验证研究结论,并提出管理启示。  相似文献   

HIV/AIDS传播的动力学模型及其分析     

徐英  杨娟 《遵义师范学院学报》2010,12(1):84-87

建立了含有常微分方程和偏微分方程的方程组来描述的模型。考虑了垂直感染、AIDS病人具有传染性、发病年龄、AIDS病人有可能恢复到潜伏期这些因素,利用系统方程,直接推出：当AIDS引起死亡率变化时,社会总人口衰减。利用泛函分析方法和有界线性算子半群理论分析了系统的适定性问题。  相似文献