运动传感器让运动变得数字化

运乡传感器可帮助电子设备实现差异化设计以提升竞争力，越来越多产品将运动检测功能纳入“标配”。本文介绍了几种常见运动传感器的实现原理，以及如何将它们配合使用以达到最佳效果。     

Multi-Play业务运营的好帮手——基于资源策略控制的精细化经营解决方案

BoD、VoD、IPTV等Multi-Play融合业务的不断涌现,使运营商在业务运营上面临越来越复杂的挑战:如何提供个性化、差异化的业务?如何加强融合性的业务体验?如何面对持续创新的互联网业务?如何监控、运营P2P业务?这一系列的问号使运营商深陷困境。     

运动MEMS传感器及其在汽车工业的新应用

1前言汽车电子是全球半导体市场中最受追捧的应用市场之一,汽车技术创新是影响汽车差异化和消费者购车的最重要的因素。MEMS是汽车市场增长最快的半导体芯片,其中,加速度计、陀螺仪和压力传感器占比最大。本文将重点介绍如何在新兴的汽车技术领域利用MEMS芯片提高汽车智能化,同时本文还向读者简要介绍MEMS技术。     

信息化重塑家电企业竞争力

企业的竞争优势策略,大部分都是采用成本领先或差异化战略。对于陷入“红海”竞争的中国家电企业来说,如何通过应用信息技术,使组织效率、成本领先、差异化战略和管理水平上一个台阶?     

新世代产品之设计心法（3）产品生产供过于求后的突破法门

设计法门（七）：善用新颖组件 第七个法门,善用活化“新颖组件”。比如说,超级电容器还有锂离子电容器以及图谋产品差异化很有效的各式各样传感器,诸如3轴加速传感器、地磁传感器、照度传感器、触觉、嗅觉、味觉传感器等等。     

色彩传感器：通过控制颜色实现产品差异化

色彩传感器主要是用来识别颜色,也就是用来判断测量到的颜色与所期望的颜色是否一致。它不仅可用于液晶电视等消费类设备,而且可以广泛应用于工业设备,甚至玩具中。色彩传感器有可能成为产品差异化的关键所在。今后,其应用还将进一步扩大。     

基于Arduino和AppInventor2的无线传感器网络网关设计

最近十年,无线传感器网络(wireless Sensor Networks,WSN)发展的速度越来越快,并广泛应用在环境监测?智能家居?智能交通等多个领域?现阶段无线传感器网络发展的核心关键是如何充分让现有设备真正发挥自身作用,物尽其用?提出 了一种基于Arduino和Google AppInventor2的物联网无线传感器网关设计方案?该系统在现有各种专用无线传感器网络基础上,增加开源Arduino硬件实现网关功能;Google AppInventor2则提供简单易用的人机接口?该方案的两个子模块均具有低成本,兼容现有软硬件系 统和开源自定义等特征,为物联网的快速定制 和部署提供了新的参考?     

烽火FreeLink DSLAM在北京通信公司的成功应用

1ADSL技术面临的挑战 ADSL技术以其技术成熟、资源利用率高、低成本等综合优势,逐步成为目前宽带接入的主流技术.各个运营商大量进行了ADSL工程建设,他们在大规模部署ADSL时与以往的选择使用相比,面临着一系列新的问题需要解决.如:如何解决边缘机房空间普遍紧张?如何适应用户的差异化需求,用单一的设备来满足不同的需求?如何降低网络建设和维护成本?如何进一步提高网络的可靠性等等.     

传感器网络技术与标准化连载(一)传感器网络与智慧地球

随着传感器网络的快速发展,将进一步推动计算机、互联网、移动通信的发展和融合,形成全新的产业和运营模式。传感器网络可以广泛地应用于智能电网、智能交通、公共安全、环境监测、工业监测、精细农业、个人健康、节能减排等社会、生活的各个领域,成为衡量一个国家科技发展水平的标志,日益受到各国战略层面的重视。 由于传感器网络应用众多,产品差异化大,极大地影响着传感器网络标准的制定和大规模产业化,传感器网络标准的制定是一个全新的挑战。从本期开始,我们将刊登系列文章,介绍传感器网络中的关键技术和相关国际标准。     

BREW：无线数据业务市场的收入源泉

中国联通副总裁李正茂近日表态说:“中国联通2006年重要的市场战略包括:将利用BREW解决方案提供的导航、移动视频、音乐和3D游戏等数据业务加强CDMA1×的市场地位。并将向市场提供具有BREW业务的零售价低于80美元的CDMA1×手机,还将在所有的超低端手机都嵌入BREW技术。”李正茂副总裁对BREW的此番表态,源于BREW解决方案在2005年不仅在财务贡献方面有不俗的表现,更重要的是对联通CDMA1×市场整体战略的重要意义。那么BREW目前发展如何?如何提供差异化的服务和增强用户的业务体验?联通为什么将所有的低端、超低端手机都嵌入BREW技术?高通(中国)高级总监、联通博路总经理沈劲给了一番回答。     

GEMNET: a generalized, shuffle-exchange-based, regular, scalable,modular, multihop, WDM lightwave network

GEMNET is a generalization of shuffle-exchange networks and it can represent a family of network structures (including ShuffleNet and de Bruijn graph) for an arbitrary number of nodes. GEMNET employs a regular interconnection graph with highly desirable properties such as small nodal degree, simple routing, small diameter, and growth capability (viz. scalability). GEMNET can serve as a logical (virtual), packet-switched, multihop topology which can be employed for constructing the next generation of lightwave networks using wavelength-division multiplexing (WDM). Various properties of GEMNET are studied     

Thermodynamics of copper matte converting: Part III. Steady-state volatilization of Au,Ag, Pb,Zn, Ni,Se, Te,Bi, Sb,and As from slag,matte, and metallic copper

A comprehensive compilation of various thermodynamic data required for a complete analysis of copper matte converting reactions is presented. The data comprise estimated free energies of formation for such gases as SeO, SeS, TeO, TeS, BiO, BiS, SbO, SbS, AsO, and AsS, as well as activity coefficients in dilute copper alloys and vapor pressures of various elements and compounds. The volatilization of minor elements in steady-state reactors comprising gas and several condensed phases is mathematically formulated, and a parameter which governs the volatilization in such reactors is defined and named volatilization constant. The vapor pressures of various volatile species are calculated thermodynamically for the Noranda Process reactor by assuming equilibrium conditions. The volatilization constants of various minor elements are expressed explicitly as functions of oxygen and sulfur activities. Formerly Associate Professor, Department of Metallurgical Engineering, University of Utah, Salt Lake City, UT     

Novel planar, square-shaped, dielectric-waveguide, single-, and dual-mode filters

This paper presents a novel concept of a square-shaped dielectric-waveguide resonator, which can easily realize a dielectric-waveguide cross-coupled filter or a dielectric-waveguide dual-mode filter, using the conventional printed circuit board (PCB) process. This planar dielectric-waveguide resonator has a higher Q value than a microstrip resonator. The physical mechanisms of both single- and dual-mode filters are elucidated. Some new coupling structures are developed for undergoing the PCB process. Filter design procedures are detailed. Design curves for the coupling coefficients of internal- and external-coupling structures are determined by full-wave finite-element-method electromagnetic calculations. Measurement results are highly consistent with theory for all trial filters. This study offers an effective means of producing low-cost high-performance planar circuit filters.     

Bits, symbols, bauds, and bandwidth

The use of clear, concise, and unambiguous language in telecommunications engineering is vital to communicate a desired meaning and understanding. Terminology should be based on rigorous engineering principles and traceable to well known and dependable sources. This article deals with four everyday terms commonly encountered in the popular semi-technical press as well as in serious engineering periodicals. The misuse of these and other terms can lead to low-balled cost proposals, court litigation, and patent infringement cases. Imagine how an engineering student can be confused when she/he typically encounters bandwidth measured in bits per second     

PBX技术.市态.营销.选购

本文介绍了ＰＢＸ交换机的技术及市场需求态势。并提出ＰＢＸ产品的营销要素及其用户在选购时应遵循的原则。     

Dilemmas,uncertainty, risks,and board performance

This paper traces the origins of the words risk, uncertainty, governance and development and argues that a deeper understanding of each allows more effective decision taking in the boardroom. It argues that the role of the board of directors is to balance and rebalance continuously their irresolvable dilemma — ‘how do we drive our enterprise forward while keeping it under prudent control?’ It argues that it is the board’s role to focus on uncertainty, rather than risk, and this requires a different set of intellectual skills from board members to be able to cope with monitoring a range of diverse scenarios. This is crucial for a board to develop stronger ways of both leading their organisation and of ensuring the connectedness of the learning within and between the board and the operational unit’s risk taking. It advocates that to achieve this a board must develop new ways of learning — especially of thinking strategically and becoming more sensitised to the dynamics of their changing external environments. This will take them well beyond the comforts of their specialist managerial disciplines and into the true world of directing. The paper demonstrates the importance of continuous learning in reducing organisational uncertainty and risk. It uses the ‘Learning Board’ process and model as the central processor of both strategic and operational learning to create an annual rhythm for the board’s year.