目的系统评价商业视频游戏(commercial video games,CVG)对改善脑卒中患者平衡功能、生活质量的作用。方法计算机检索Cochrane图书馆、Medline、荷兰医学文摘数据库、Pubmed、Web of Science、中国生物医学数据库、中国期刊全文数据库...目的系统评价商业视频游戏(commercial video games,CVG)对改善脑卒中患者平衡功能、生活质量的作用。方法计算机检索Cochrane图书馆、Medline、荷兰医学文摘数据库、Pubmed、Web of Science、中国生物医学数据库、中国期刊全文数据库、万方数据库、维普期刊资源整合服务平台,截至2016年9月22日公开发表的关于CVG应用于脑卒中患者康复训练的随机对照试验(randomized controlled trial,RCT)。由3名研究员对符合纳入标准的文献进行质量评鉴和资料提取,对符合质量标准的RCT进行Meta分析。结果共纳入14项RCT,包括523例患者。6项RCT在传统康复治疗基础上增加额外CVG治疗时间,8项RCT的实验组与对照组干预时间相等。两组干预时间相等时,实验组对动态平衡Berg平衡指数量表评分改善更显著(MD=1.35,95%CI=0.43,2.27)。结论 CVG辅助传统康复治疗法可改善脑卒中患者平衡功能障碍,提高生活质量。同等干预时间,CVG辅助传统康复训练法对动态平衡功能的改善优于单纯传统康复治疗。展开更多
The whole angle mode gyroscope(WAMG)is considered to be the next generation architecture,but it is suffered from the asymmetry errors to conduct real products.This paper proposes a novel high frequency injection based...The whole angle mode gyroscope(WAMG)is considered to be the next generation architecture,but it is suffered from the asymmetry errors to conduct real products.This paper proposes a novel high frequency injection based approach for the error parameters online identification for the WAMG.The significance is that it can separate physical and error fingerprints to enable online calibration.The nonlinear WAMG dynamics are discretized to meet the requirement of numerical precision and computation efficiency.The optimized estimation methods are then constructed and compared to track asymmetry error parameters continuously.In the validation part,its results firstly prove that the proposed scheme can accurately identify constant asymmetry parameters with an overall tracking error of less than 1 ppm and the extreme numerical convergence can reach 10^(-12)ppm.Under the dynamic asymmetry variation condition,the root mean square errors(RMSE)indicate that the tracking accuracy can reach the level of10^(-3),which shows the robustness of the proposed scheme.In summary,the proposed method can effectively estimate the WAMG asymmetry errors online with satisfied performance and practical values.展开更多
Quartz rate sensors （QRS） made out of one single piece of quartz crystal are inertial devices which can be used for general rate control, stabilization, automotive and aerospace/defense markets, etc. The mechanical ...Quartz rate sensors （QRS） made out of one single piece of quartz crystal are inertial devices which can be used for general rate control, stabilization, automotive and aerospace/defense markets, etc. The mechanical design of the QRS has been investigated based on axiomatic design. The axiomatic design matrix of the mechanical structure of Coriolis Vibratory Gyroscopes （CVG） has been proposed. The mechanical function of QRS is divided into three Function Requirements （FR） , i. e. , FR1 is the drive mode, FR2 is the sense mode, FR3 is a coupled connection where the Coriolis force can couple the two modes with a term proportional to the rotational rate. A new QRS which is easy to be fabricated has been put forward. Furthermore, the new QRS indicated that the axiomatic design is a help to functional design of products.展开更多
近日，CVG网站公布了一则他们对DICE总经理Karl Magnus Troedsson的采访内容。Karl表示：“我可以很明确的说，这一次的《战地3》将由PC平台主导。但正如你之前所听说的，它将同样支持PS3和Xbox 360，只不过在这两个平台上游戏性会被一...近日，CVG网站公布了一则他们对DICE总经理Karl Magnus Troedsson的采访内容。Karl表示：“我可以很明确的说，这一次的《战地3》将由PC平台主导。但正如你之前所听说的，它将同样支持PS3和Xbox 360，只不过在这两个平台上游戏性会被一定程度的缩减。”虽然Karl承认了家用机版的《战地3》将被一定程度的缩减，但他强调本作仍然会无比强大。展开更多
文摘目的系统评价商业视频游戏(commercial video games,CVG)对改善脑卒中患者平衡功能、生活质量的作用。方法计算机检索Cochrane图书馆、Medline、荷兰医学文摘数据库、Pubmed、Web of Science、中国生物医学数据库、中国期刊全文数据库、万方数据库、维普期刊资源整合服务平台,截至2016年9月22日公开发表的关于CVG应用于脑卒中患者康复训练的随机对照试验(randomized controlled trial,RCT)。由3名研究员对符合纳入标准的文献进行质量评鉴和资料提取,对符合质量标准的RCT进行Meta分析。结果共纳入14项RCT,包括523例患者。6项RCT在传统康复治疗基础上增加额外CVG治疗时间,8项RCT的实验组与对照组干预时间相等。两组干预时间相等时,实验组对动态平衡Berg平衡指数量表评分改善更显著(MD=1.35,95%CI=0.43,2.27)。结论 CVG辅助传统康复治疗法可改善脑卒中患者平衡功能障碍,提高生活质量。同等干预时间,CVG辅助传统康复训练法对动态平衡功能的改善优于单纯传统康复治疗。
基金funded by the National Natural Science Foundation under grant No.62171420Natural Science Foundation of Shandong Province under grant No.ZR201910230031。
文摘The whole angle mode gyroscope(WAMG)is considered to be the next generation architecture,but it is suffered from the asymmetry errors to conduct real products.This paper proposes a novel high frequency injection based approach for the error parameters online identification for the WAMG.The significance is that it can separate physical and error fingerprints to enable online calibration.The nonlinear WAMG dynamics are discretized to meet the requirement of numerical precision and computation efficiency.The optimized estimation methods are then constructed and compared to track asymmetry error parameters continuously.In the validation part,its results firstly prove that the proposed scheme can accurately identify constant asymmetry parameters with an overall tracking error of less than 1 ppm and the extreme numerical convergence can reach 10^(-12)ppm.Under the dynamic asymmetry variation condition,the root mean square errors(RMSE)indicate that the tracking accuracy can reach the level of10^(-3),which shows the robustness of the proposed scheme.In summary,the proposed method can effectively estimate the WAMG asymmetry errors online with satisfied performance and practical values.
文摘Quartz rate sensors （QRS） made out of one single piece of quartz crystal are inertial devices which can be used for general rate control, stabilization, automotive and aerospace/defense markets, etc. The mechanical design of the QRS has been investigated based on axiomatic design. The axiomatic design matrix of the mechanical structure of Coriolis Vibratory Gyroscopes （CVG） has been proposed. The mechanical function of QRS is divided into three Function Requirements （FR） , i. e. , FR1 is the drive mode, FR2 is the sense mode, FR3 is a coupled connection where the Coriolis force can couple the two modes with a term proportional to the rotational rate. A new QRS which is easy to be fabricated has been put forward. Furthermore, the new QRS indicated that the axiomatic design is a help to functional design of products.
文摘近日，CVG网站公布了一则他们对DICE总经理Karl Magnus Troedsson的采访内容。Karl表示：“我可以很明确的说，这一次的《战地3》将由PC平台主导。但正如你之前所听说的，它将同样支持PS3和Xbox 360，只不过在这两个平台上游戏性会被一定程度的缩减。”虽然Karl承认了家用机版的《战地3》将被一定程度的缩减，但他强调本作仍然会无比强大。
