《S60编程指南》——成功编程的有趣指南

什么是手机的心脏和灵魂？那就是手机操作系统！哪种手机操作系统的用户多达两亿？那就是Symbian OS！在全球四大手机操作系统中,Symbian操作系统遥遥领先,一家独大。它挟诺基亚手机在市场优势强劲之利,一直以捆绑诺基亚手机作为其市场的利器,获得了极大的市场份额。截至2007年年底,在全球智能手机市场,Symbian操作系统就占据了80％的市场份额。     

Symbian落户中国意在抢占智能手机市场

2007年1月16日,全球主要的智能手机操作系统供应商Symbian软件有限公司宣布Symbian中国公司正式成立。同时,Symbian预测,到2008年,智能手机全球年销售额将达到2亿部,无论智能手机厂商还是手机操作系统厂商都将迎来新机遇。Symbian全球首席执行官Nigel Clifford先生亲自来华宣布了该消息。他表示:中国市场是Symbian重要的战略市场之一,目前中国市场占Symbian全球销量的10%。因为Symbian的大部分客户已在中国开展业务,所以Symbian决定成立中国公司。Sy mbian主要由诺基亚和爱立信等公司倡导建立。目前,使用Symbian操作系统的手机厂商主要…     

易观国际电信业分析师邓中元移动互联网竞合并存

在传统的手机领域，诺基亚全资拥有了Symbian并宣布建立开放的手机平台；Google联合多家企业成立了开放手机联盟，着手开发开放手机平台Andorid；而微软凭借PC领域的优势也将操作系统移植到手机上。毫无例外，这些手机平台都将纳入很多的移动业务和应用，和运营商的手机定制有明显的相似。     

在可靠的平台上进行程序开发——浅析《Symbian OS平台安全——用Symbian OS安全架构进行软件开发》

在过去的几年里,我们看到手机上使用的编程环境的功能和灵活性被极大增强,手机正在走向计算机和互联网的开放性.而得到世界领先的移动电话制造商许可的先进的、可定制的操作系统--Symbian OS,以其无可挑剔的市场表现,占据着很大的市场份额.然而,由于基于Symbian OS和其他开放操作系统的手机的比例显著增加,因此其手机操作系统也成为恶意软件编写者的重要目标.     

手机软件市场将进入后服务时代

诺基亚出资4.1亿美元收购了Symbian公司余下的52％的股份,从而将Symbian变成诺基亚的全资子公司,并准备推广免费开放的Symbian手机操作系统,这无疑为手机软件市场增添了新的色彩。     

四款新锐机王之间的对决——创新的力量 HTC G1

如今的Google在互联网世界可以说是能够呼风唤雨的大佬,而当这位拥有激进创新精神的大佬加速迈开步伐闯进手机操作系统平台后,无疑给整个手机市场带来了一场震撼,从2007年11月Google主导的开放手机联盟成立至今拥有第一款采用Android系统平台的手机,Google仅仅用一年有余的时间就给整个手机市场带来了广泛的轰动效应。即使是算上Google收购Android之前的开发时间,     

摩托罗拉A760使用进阶

智能手机一直是各大手机制造厂商展示自己实力的舞台，而在手机操作系统方面，也一直是PPC、Symbian和Linux三雄争霸。近期，摩托罗拉的两个主要竞争对手诺基亚和索屁爱立信在国内市场接连推出了基于Symbian平台的6600和P908手机。     

手机操作系统竞争升温微软融合PC成致命武器

继音乐手机、拍照手机之后,今年,智能手机成了市场的主角. 5月下旬传来消息,微软正在与诺基亚的竞争对手合作,生产更先进的面向消费者和企业的智能手机,以此来抗击自己的竞争对手Symbian.作为后进入者,凭借手机与PC结合的优势,微软的手机操作系统已经吸引了众多人的眼球,成了Symbian最强有力的竞争对手.     

谷歌图谋无线

2007年11月5日,谷歌牵头成立了开放手机联盟(Open Handset AIliance),联盟成员包括芯片供应商、手机制造商、手机软件设计商、移动运营商等34家公司.     

Symbian中国研发中心成立目标直指10亿智能手机市场

根植中国 日前,手机操作系统领域的领导者Symbian公司宣布在北京成立其全球第四个研发中心.Symbian公司首席执行官Nigel Clifford在新闻发布会上的一段话可以很好解释选择在中国成立研发中心的原因.     

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.