北斗定位通信技术在定向运动中的应用研究

随着我国北斗卫星导航系统的逐步完善,北斗定位通信技术在定向运动中得到充足应用,有效帮助教练员实现了对训练过程的实时监视、控制、指挥与安全预警,解决了训练过程中"又聋又哑"的尴尬问题,弥补了定向运动"只看结果、不计过程"的盲目训练方法的不足,为定向运动队进行科学施训、制定训练计划、针对性指导各项技能训练奠定了坚实基础;切实提高训练质量,防止伤亡等突发事件的发生,不断增加定向运动的安全性、科学性和实践性。     

棒球训练质量改进研究

众所周知,高校棒球运动训练作为现代运动训练的一个重要组成部分,是棒球运动的主要理论和实践问题之一。如何更有效、更合理化的运用质量管理的方法提高训练质量和效率,优化训练过程,是我们将要探讨的问题。     

浅析青少年皮划艇运动员的核心力量训练

皮划艇是一项对身体综合力量要求非常高的周期性体育运动项目。在整个运动过程中运动员需要克服来自水流、空气及自身等多个方面的阻力,因此,皮划艇项目对运动员的综合力量要求非常高。核心力量训练被教练员和运动员认为是训练的一个重要组成部分,在皮划艇整个训练中占有很重要的地位。本文就根据皮划艇项目的专项特点及青少年的生理特点分别从青少年皮划艇运动员的核心力量训练的概念、内容和方法以及核心力量训练在青少年皮划艇训练中的作用等三方面进行论述,旨在为一线的皮划艇静水项目的教练员和运动员提供一些有益的参考。     

物联网在竞技运动监测中的应用研究

物联网技术因其巨大的应用前景而受到各国政府、学术界和工业界的广泛重视。介绍了物联网在竞技运动中的意义,分析了竞技运动中物联网的体系结构,设计了一个可以应用于日常训练中的物联网系统。通过便携式传感器采集运动员的心率、脉搏和血压等生理参数,使用基于RFID技术对不同运动员进行标识,使得教练员可以实时获取运动员的生理参数,制定有针对性的训练计划,以促进竞技运动的发展。     

羽毛球体教“一体化”下后备人才培养的研究

运用文献资料调研、实地调查与访谈等方法,对益阳市二所国家级羽毛球运动人才培养基地的人才培养现状进行了研究。结果表明:受市场经济转型的影响,益阳市羽毛球运动项目的生源质量呈下降趋势,教练员队伍较为稳定,羽毛球运动学校的训练设施与体教结合的教学资源较为好,但运动训练的科学化水平不高。地方政府应加大对羽毛球学校的财政投入,羽毛球学校应采多渠道办学形式广泛吸引生源,理顺人才培养过程中的利益效益,以促进羽毛球竞技后备人才培养的可持续发展。     

多功能起跑器的设计和研究

蹲踞式起跑是中长跑运动员在运动技术训练过程中的一个重要环节。但是在训练过程中,教练员较难掌控运动员双腿的发力状况及瞬间反映速度。本文介绍了一款能测试运动员双腿的发力状况及瞬间反映速度的多功能起跑器。     

浅析举重运动损伤及预防策略

举重运动属于竞技性项目,比赛开把重量的试举是影响比赛成绩的决定性因素,运动员的身体状况、心理因素和平时训练情况对比赛时的影响至关重要。运动损伤后运动员除了进行有效的恢复训练以外,其自身也需要加强自我防范意识的提高。本文通过对浙江举重队运动员运动损伤情况的研究和分析,供相关运动员和教练员参考,也为今后的训练提供理论支持。     

基于云计算的运动训练管理系统设计

为提升运动训练系统数据处理性能,设计了基于云计算的运动训练管理系统.系统采用B/S三层架构,硬件设施层以云硬件为基础,为功能层内运动训练各项功能实现提供保障;功能层由人员管理模块与训练管理模块等组成,实现系统具体功能;云服务应用层作为交互通道,实现使用者与系统功能之间的交互.训练管理模块是系统功能层的核心模块,其中包含...     

浅析对篮球运动员篮球意识的培养

篮球作为一个复杂多变的运动项目,需要运动员能够灵活地运用综合性技战术,这就是意识,被称为篮球运动的灵魂。篮球意识的培养是一个循序渐进、日积月累的过程,教练员的训练技巧,是其中关键一环。篮球意识的培养关系到篮球运动水平的高低,培养篮球意识的方法是提高运动员观察判断能力、身体素质和理论水平,同时,正确的心理训练反复的熏陶和正确的评价体系也是形成篮球意识必不可少的要素。     

基于物联网技术的定向运动教学与训练研究

本文以定向运动教学和训练组织、竞赛管理为研究对象,搭建基于物联网技术的竞训平台,本系统通过RFID技术,借助定位器、标识卡及读写器等终端设备,能够动态定位运动场上人员和器材的分布状况和运动轨迹,实现多种定向运动竞训元素的合理匹配,节约竞训时间和成本,对校园定向运动教学和训练的科学化、比赛的管理具有积极的促进作用。     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first     

JOURNAL OF ELECTRONICS(CHINA)

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NEXT GENERATION WIRELESS NETWORKS–ESPECIALLY THE USE OF MILLI-MICROWAVE BANDS

The global bandwidth shortage of wireless communications has motivated the exploration of the naillimeter wave （ram-wave） frequency spectrum for the next generation wireless communications. Recent advances in RF CMOS technology and high speed baseband signal processing technologies have enabled tile extensive research and development of turn-wave wireless communications. The multi gigabit per second data rate of ram-wave system will lead to applications in many important scenarios, such as WPAN, WLAN,back-haul for cellular system. And the frequency bands include 28 GHz, 38 GHz, 45GHz, 60GHz, E-BAND and even beyond 100 GHz. The propagation and the imitation of the RF circuits design in these frequency bands make the directional antennas be inevitable for mm-wave communications.