空气中相位板调制下的飞秒激光成丝过程

对均匀和非均匀分布的两种相位板调制下飞秒激光成丝过程进行理论研究。研究表明,两种情况下飞秒激光都形成模式可控的细丝阵列。对比发现,使用均匀相位板产生的细丝模式更为分隔清晰且稳定,而非均匀分布的相位板使激光形成的细丝阵列长度更长。     

Validation of Moticon’s OpenGo sensor insoles during gait,jumps, balance and cross-country skiing specific imitation movements

The purpose of this study was the experimental validation of the OpenGo sensor insole system compared to PedarX sensor insole and AMTI force-plate systems. Sixteen healthy participants performed trials in walking, running, jumping (drop and counter movement jumps), imitation drills and balance, with simultaneous measures of all three systems. Detected ground contact and flight times with OpenGo during walking, running and jumping were similar to those of AMTI. Force–time curves revealed comparable shapes between all three systems. Force impulses were 13–34% lower with OpenGo when compared to AMTI. Despite differences in mean values in some exercise modes, correlations towards AMTI were between r = 0.8 and r = 1.0 in most situations. During fast motions, with high force and impact, OpenGo provided lower force and latency in force kinetics. During balance tasks, discrepancy in the centre of pressure was found medio-lateral, while anterio–posterior direction was closer to AMTI. With awareness of these limitations, OpenGo can be applied in both clinical and research settings to evaluate temporal, force and balance parameters during different types of motion. The fully mobile OpenGo system allows for the easy and quick system application, analysis and feedback under complex field conditions, as well.     

转炉烟气一次除尘废水处理流程设计简介

文中对转炉烟气一次除尘废水处理工艺流程作了简单的介绍,该流程能够使钢厂转炉烟气除尘水基本实现闭路循环,达到节能减排的良好效果。流程中粗颗粒分离必不可少,而且在斜板沉淀池前加了电磁场辅以絮凝,使后序处理更加理想。     

大型储罐第一圈壁板接管的焊接及热处理

文章介绍如何对大型储罐第一圈壁板的开孔处进行刚性加固以减小热处理后由于大量焊接应力释放导致的壁板严重变形,加固板采用连接板补偿的形式安装在壁板上。并且介绍在施工现场预制开孔板以降低施工成本,热处理炉采用地下形式制作,具有良好的保温效果。     

冲击碾压技术在混凝土面板堆石坝工程中的应用

简要介绍了冲击碾压技术的特点,并结合工程实际,分析探讨了这一新技术、新工艺在混凝土面板堆石坝填筑施工中运用的可能性,提出了解决在其实施中不足的措施.     

中国手枪速射运动员身体稳定性与环值相关性研究

本文探讨中国手枪速射运动员身体稳定性与环值的相关性.采用专家访谈法、测试法、个案分析法等,通过比利时Footscan平板式压力测量系统测量速射运动员射击时重心晃动距离、晃动面积、射击环值等指标,并针对力学分析结果进行个案训练.研究发现:第一,技术动作方面,中国速射运动员在注重完整动作流畅基础上,要重视第一靶动作和节奏控...     

Nonlinear vibration of circular plate with variable thickness

ＮｏｎｌｉｎｅａｒＶｉｂｒａｔｉｏｎｏｆＣｉｒｃｕｌａｒＰｌａｔｅｗｉｔｈＶａｒｉａｂｌｅＴｈｉｃｋｎｅｓＹｅＺｈｉｍｉｎｇ（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＡｐｐｌｉｅｄＭａｔｈｅｍａｔｉｃｓａｎｄＭｅｃｈａｎｉｃｓ）ＡｂｓｔｒａｃｔＴｈｉｓ...     

世界游泳区域竞技格局的研究

以各区域游泳项目竞技能力为研究单位,通过对2009年世界游泳锦标赛上各参赛国各项目成绩统计分析,研究各区域竞技格局分布情况。结果表明,世界游泳强势板块由欧洲和北美洲构成,弱势板块由亚洲、大洋洲、南美洲和非洲构成,强势板块中,欧洲游泳竞技格局处于垄断地位,弱势板块中,非洲竞技项目比较单一发展不合理。