优化设计在设备技术改造中的应用     

吴先文 《四川工程职业技术学院学报》2007,21(3):32-34

本文研究了常用优化设计方法在新的水压机活动横梁中的应用,对活动横梁的结构参数进行了优化,保证设计方案达到最佳;并建立了活动横梁的有限元力学模型,对该结构进行了三维有限元强度分析。  相似文献   

跆拳道实占姿势站立方法初探     

吴锵 《体育科学研究》1997,(3)

实占姿势是跆拳道(竞技跆拳道以下同)基本技术之一,是跆拳道一切攻防技能的基础,通过对跆拳道实战姿势兀种不同的站立门法进行分类对比,以指导今后的跆拳道的教学和训练。通过分析对比,表明不同的站立方法对跆拳道运动员在比赛中采用何种技、战术有直接影响。  相似文献   

专利引证视角下的虚拟化技术竞争态势     

周婷  文禹衡 《图书情报工作》2015,59(19):30-40

[目的/意义] 运用专利引证分析虚拟化技术,客观呈现其当前的竞争态势。[方法/过程] 采用Innography系统,构建虚拟化技术专题数据集,运用专利向后引、专利向前引等方法,以全球虚拟化技术专利数量TOP 50的企业为总体研究样本,将华为作为单一研究对象,首先廓清全球虚拟化技术领域的竞争背景,继而分析全球虚拟化技术引证情况、技术领域IPC分布等。[结果/结论] IBM、微软、因特尔和惠普是虚拟化技术领域的领导者,SAP SE、Commvault Systems、思杰、亚马逊、Tekelecs成为新兴竞争者。虚拟化技术主要领域的IPC分布为G06F09、G06F12、G06F15、G06F11、G06F17、G06F13、G06F03、H04L12,当前G06F01、H04L09日趋式微,而G06F07、H04L29、H04W04渐为技术热点。  相似文献   

弘扬中华优秀传统文化的理性思考     

张敬梅 《湖北函授大学学报》2015,(12):179-180

中华优秀传统文化的思想体系源远流长、博大精深、璀璨辉煌。弘扬中华传统文化必须要建立优质的传承体系,完善优质的文化教育。弘扬中华优秀传统文化功在当代、利在千秋,是历史赋予我们的庄严而崇高的使命。本论文以科学发展观为指导,以弘扬中华优秀传统文化为基本出发点,深入贯彻落实党的十八大和十八届三中全会精神,探讨弘扬中华优秀传统文化的时代价值,从当前的实际情况去研究,分析了在弘扬传统文化的过程中存在的问题,总结了弘扬传统文化的对策与建议,体现了创新性,对于加快弘扬中华优秀传统文化具有重要的理论价值和现实指导意义,对小康社会的全面建成,实现中华民族伟大复兴提供了深远而有益的借鉴与参考。  相似文献   

Effects of forward trunk lean on hamstring muscle kinematics during sprinting     

Ayako Higashihara  Yasuharu Nagano  Kazumasa Takahashi  Toru Fukubayashi 《Journal of sports sciences》2015,33(13):1366-1375

This study aimed to investigate the effects of forward trunk lean on hamstring muscle kinematics during sprinting. Eight male sprinters performed maximal-effort sprints in two trunk positions: forward lean and upright. A three-dimensional musculoskeletal model was used to compute the musculotendon lengths and velocity of the biceps femoris long head, semitendinosus, and semimembranosus muscles during the sprinting gait cycle. The musculotendon lengths of all the three hamstring muscles at foot strike and toe-off were significantly greater during the forward trunk lean sprint than during the upright trunk sprint. In addition, a positive peak musculotendon lengthening velocity was observed in the biceps femoris long head and semimembranosus muscles during the late stance phase, and musculotendon lengths at that instant were significantly greater during the forward trunk lean sprint than during the upright trunk sprint. The present study provides significant evidence that a potential for hamstring muscle strain injury involving forward trunk lean sprinting would exist during the stance phase. The results also indicate that the biceps femoris long head and semimembranosus muscles are stretched during forward trunk lean sprinting while contracting eccentrically in the late stance phase; thus, the elongation load on these muscles could be increased.  相似文献   

大地电磁模拟退火反演研究     

李琳  白运 《安阳工学院学报》2011,10(2):42-43,46

主要介绍模拟退火算法的基本原理和实现步骤。将模拟退火算法引入MT资料反演,针对MT正演多参数和非线性的特点,采用合适的降温方式和选择机制,以提高运算速度和运算精度。结合具体的反演算法原理和实现方法,使用不同的MT正演理论模型进行验证,获得良好的的结果。  相似文献   

Conceptualising Intergenerational Lived Experience: Integrating Art–Moving–Well-Being across Disciplines,Communities and Cultures     

Megan Adams  Geraldine Burke  Nikki Browne  Karan Kent  Kylie Colemane  Laura Alfrey  Aislinn Lalor  Keith Hill 《The International Journal of Art & Design Education》2023,42(2):216-229

Art and movement are motivating forces in, through, and beyond education. As populations age, there is an increasing need to support physical and social well-being. Yet, since the onset of the COVID-19 pandemic, there has been a reported exponential increase in feelings of loneliness across generations. Complex challenges require trans-disciplinary solutions, and this paper represents a joint effort within and across disciplines, communities and cultures to find ways to ameliorate this silent epidemic. In this paper, we propose a cross-disciplinary conceptual framework where Aboriginal Artists and Knowledge Holders, Teacher Educators, and Physical and Occupational Therapists come together to explore theoretical and pedagogical insights that encompass intergenerational art–moving–well-being practices, reducing feelings of loneliness and improving social connections across generations. There are two main aims of this paper; first, to better understand current studies that report on integrating art–moving–well-being practices, and the effect this has on health and well-being of intergenerational participants (under 10-year-olds, 20+ year olds and 50+ year olds). Second, based on community needs, the long-term aim is to propose a flexible art–moving–well-being conceptual model that is scalable, sustainable and based on social and relational support systems. We propose a model that is flexible and adaptable within and across our local community and beyond. We argue that feelings of loneliness are unique to each individual, and there is a need to connect specific intergenerational programmes with art–moving–well-being practices that readily engage and integrate varied communities and cultures in sustainable ways and thus, contribute to thriving communities.  相似文献   

快速移动错位干扰通信的高效矫正技术研究     

王艳玲  李倩  肖萍萍  田纪亚 《科技通报》2014,(11)

在快速移动的列车上,通信节点会发生错位,干扰列车的正常通信,导致列车通信信号幅度和延时增高,由于传统的干扰信号矫正方法需要频繁调整信号幅度才能满足快速通信要求,导致列车通信质量严重下降。提出一种自适应的快速移动错误干扰通信信号矫正方法,分析了列车快速移动过程中最佳通信节点的定位,对最佳通信节点进行融合,可确保运行列车的顺利通信,通过形态学滤波方法预测起伏的受干扰通信信号基底并进行修正,按照修正频谱的受干扰信号谱线分布特征预测出自适应检测门限,并同修正频谱进行对比,完成快速移动列车通信受干扰通信信号的检测。实验结果说明,利用所提方法进行快速移动错位干扰信号的矫正处理后,列车通信信号幅度和延时都优于传统方法,满足移动列车旅客的出行需求。  相似文献   

体操运动中双杠悬垂前摆类动作技术的分类     

杨兴权 《上海体育学院学报》1998,(4)

根据文献资料,且结合当今体操比赛的实际,对双杠悬垂前摆类动作技术进行了分类,即前摆制动类、前摆腾空类,前摆转体类。在此基础上,对每一类动作技术的特点及发展趋势,进行了论述。  相似文献   

直线摆动式散货装船机的惯性力分析     

谢道俊 《上海海事大学学报》1989,(2)

直线摆动或散货装船机是一种高效连续输送机械。本文将它简化为力学模型,进行运动学的分析,并导出在各种工况下各部件和被输送物料惯性力分布的普遍公式,同时对一个实例的一种工况给出了计算结果。本文的分析方法、公式和结果可供同类型机械的研制、设计者参考。  相似文献