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篮球运动现场的球员运动姿态数据的感知系统设计,可以快速捕获运动技术特征,对分析运动员的技术动作,对预测篮球运动员的训练水平和比赛表现提供数据和技术支持。传统的篮球比赛现场运动姿态数据感知系统采用VICON动作捕捉系统进行姿态数据调整,采用傅立叶变换处理方法实现数据的实时调度和处理,不能实现对宽频带大功率数据的有效感知。本文提出一种基于宽频带大功率基阵的现场运动姿态数据感知算法,并进行系统设计。分别设计了传感器设备、数据传输设备、数据处理设备和信号感知设备。对篮球运动员的人体运动姿态进行传感器感知,采用3D SUIT操作,将各个传感器连接起来,构建基于宽频带大功率基阵的运动特征提取算法,进行信息感知。系统实验结果表明,该系统具有较好的数据感知性能,能实时实现数据转换和调度,进行技术分析,篮球运动现场的运动姿态数据感知性能稳定,实时性好,实现多通道多状态的信息感知和控制,对篮球训练和比赛具有提供数据支持。 相似文献
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竞技体操现场技术姿态特征数据视觉感知系统可以实时准确地捕获和分析体操动作关键技术动作,对分析和指导运动员动作特征,提高训练和裁判评价水平提供数据和技术支撑。传统的竞技体操现场技术姿态特征数据视觉采集系统采用的是基于宽频带大功率数据感知的系统采集技术,对竞技体操这种技术特征要求复杂的运动项目适用性不好。提出一种基于可变增益控制放大的竞技体操现场技术姿态特征数据视觉感知系统设计技术,采用传感器自动采集竞技体操运动员人体的位置、角速度和旋转角度等信息,给出基于可变增益控制放大的竞技体操技术姿态特征提取的模型,实现系统硬件电路设计。系统实验结果表明,提取体操运动员在不同比赛时间节点上的姿态特征数据,具有较好的数据采集性能,能实时实现数据转换和调度,竞技体操现场技术姿态特征数据视觉重构效果较好,能准确和细节展示体操运动的技术性动作,性能稳定。 相似文献
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动作捕捉(Motion capture)是一种记录或描绘人体以及其他物体动作的技术,广泛运用于体育、娱乐、影视、医疗、军事等领域。本文简要介绍一种基于惯性传感器与Zigbee网络实现的动作捕捉系统。该系统通过安装在人体不同部位的惯性传感器获得动作信息,并通过Zigbee无线传感器网络协议将数据上传给上位机。 相似文献
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人脸运动捕捉技术是采用专业的动捕设备对人脸面部表情轨迹进行采集,将捕捉到的人脸面部运动数据进行处理和分析,实现对人脸表情进行动画仿真的一门学科。本文主要介绍了Vicon Cara面部捕捉系统,对人脸面部数据采集方法进行分析与处理应用,主要包括对系统软硬件设备的介绍,人脸面部数据采集准备工作,以及采集后对数据的优化处理等工作。这套系统是目前使用广泛的面部捕捉系统,无论是在影视动画和游戏制作方面,还是语言研究及教学等方面应用越来越多。 相似文献
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人体动作捕捉系统是一种利用数字信息技术来测量人体在三维空间运动信息的技术装备,已经被广泛运用于虚拟现实、生物力学、游戏、医疗康复、体育竞技等其他人机交互领域。本文通过数据库检索、筛选、统计和分析国内外有关动作捕捉的专利申请,梳理了动作捕捉领域的技术发展脉络,对各主要技术分支的申请量进行统计,同时,对动作捕捉领域的核心专利和重要申请人进行分析。 相似文献
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为改进远程实时授课交互方式提出一个新的解决方案,即运用运动捕捉技术捕捉人物行为和表情,抽象出运动数据以驱动人体三维模型＂替身＂进行实时运动。这一方案的设计充分体现以教师为主导,以学生为主体的教育理念,通过改进现有的实时虚拟现实课堂系统的方式,最终实现远程实时授课系统师生以及生生之间最大程度的交互。 相似文献
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针对双天线干涉SAR基线测量系统数据量大、实时性要求高和体积小的特点,设计并实现了一种基于FPGA+PCI的实时数据采集存储系统.系统基于PCI总线技术,采用FPGA和大容量SDRAM对采集数据进行控制和缓存,利用多个硬盘组成的磁盘阵列进行实时存储,实现了CCD相机和激光测距仪与PCI总线间的高速数据实时传输.对系统进行了功能和性能测试,测试结果表明,系统数据吞吐量大,实时性强,性能稳定,能够有效地满足基线测量系统的需求. 相似文献
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A research group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol-a chemical found in the skins of red grapes in red wine-can improve the sensitivity of mice to the hormone insulin according to a report in the October issue of Cell Metabolism.…… 《中国科学院院刊(英文版)》2008,22(1):14-15
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said. 相似文献
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《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
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Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
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《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
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A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
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Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
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Active biological molecules functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery disease diagnosis therapy new nanodevice construction.…… 《中国科学院院刊(英文版)》2008,22(1):22-22
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction. 相似文献
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Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
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Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献
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Leah A. Lievrouw 《The Information Society》2000,16(2):155-159
This essay focuses on universal service and the Internet as means to support social and political participation. The emphasis on access to telecommunications systems in conventional approaches to universal service is contrasted with access to content. A model of the information environment is described that accounts for the roles of content and conduit, both of which are necessary conditions to achieve true access. A method is outlined for employing information indicators to observe or measure the information environment. 相似文献