摩托罗拉联手万格通讯“应用”策略角逐专业市场

日前,摩托罗拉(中国)电子有限公司政府与企业移动解决方案部宣布了其2005年专业无线对讲机最新市场策略,即以应用带动市场,大力推广“应用合作伙伴”和“产品开发”两个认证体系,充分开发专业无线对讲机在各行业市场的应用,更好地为政府和企业用户服务。通过这两个认证,摩托罗拉将与更多有实力的本地企业一起,共同推动中国专业无线通信市场的发展。与此同时,摩托罗拉宣布万格通讯成为其国内首个获得摩托罗拉应用合作伙伴认证的企业,两者将结成战略合作伙伴共同开拓公安、交通等行业市场。据悉,万格通讯是一家专业从事无线通信系统设备研发和…     

万格通讯与摩托罗拉缔结战略联盟

国内专业从事无线集群通信系统设备研发和生产的高新技术企业北京万格通讯新技术有限公司日前宣布，与摩托罗拉(中国)电子有限公司政府与企业移动解决方案部正式缔结战略联盟。双方表示，今后将致力于在无线通信领域为国内用户提供更多选择和更完善的解决方案，双方将在模拟集群应用、智能常规及数据传输方面密切合作，     

科华荣赝“IT两会”创新企业奖

摩托罗拉公司政府及企业移动解决方案部近日宣布,继沈阳大维电子有限公司和沈阳金四通科技有限公司之后,摩托罗拉在沈阳又开设了第三家对讲机及原装配件店——沈阳大四海科贸有限公司。摩托罗拉于2004年启动了以“诚心以待,信誉为本”为核心宗旨的、面向中国广大终端用户、渠道分销和经销商的摩托罗拉对讲机及原装配件店推广计划。通过该计划,摩托罗拉携手渠道伙伴更大力度地打击假冒产品,全面维护终端用户的权益,同时塑造摩托罗拉产品和服务的高品质形象。摩托罗拉通过鼓励渠道伙伴加入摩托罗拉对讲机及原装配件店计划,向终端用户提供拥有高质量保证的摩托罗拉原装真品以及相应的专业服务及增值服务,从而强化对消费者的凝聚力和品牌影响力。     

业界动态

摩托罗拉推出新一代无线网络解决方案组合——在北京、成都、广州、上海举行巡回讲座详解产品特性及行业应用 12月10日,摩托罗拉公司企业移动解决方案部宣布:摩托罗拉无线网络解决方案事业部在中国推出由六款新产品和两款解决方案组成的新一代无线网络解决方案组合。此次发布的八款全新产品和解决方案,涵盖了室内无线局域网、室外无线网状网络、点对多点网络、点对点网络以及WLAN语音解决方案。     

万格通讯与摩托罗拉缔结战略联盟

近日,从事无线集群设备研发和生产的北京万格通讯新技术有限公司宣布,与摩托罗拉(中国)电子有限公司政府与企业移动解决方案部正式缔结战略联盟,双方表示将在模拟集群应用、智能常规及数据传输方面密切合作,共同展开市场推广、产品销售和技术优化等方面的全方位合作,以公共安全     

摩托罗拉推出新一代无线网络解决方案组合

摩托罗拉公司企业移动解决方案部目前宣布在中国推出由六款新产品和两款解决方案组成的新一代无线网络解决方案组合,涵盖了室内无线局域网、室外无线网状网络、点对多点网络、点对点网络以及WLAN语音解决方案。摩托罗拉无线网络解决方案事业部将为中国地区的广大客户提供一系列性能卓越、丰富多样且处于市场领先地位的端到端无线解决方案,为客户带来无线无缝连接的灵活性与便捷性。     

上海摩托罗拉对讲机及原装配件店开业

近日，摩托罗拉公司专业无线通信部(CGISS)宣布，在上海市的两家摩托罗拉对讲机及原装配件店相继开业，上海大展通信电子设备有限公司和上海高平移动通信设备有限公司负责两店的日常经营和管理。目前，上海及周边地区有大量经摩托罗拉公司授权的合作伙伴和经销商，他们通过正规渠道销售摩托罗拉的原装真品，新开业的摩托罗拉对讲机及原装配件店就是该分销体系的有力补充。     

摩托罗拉向天津市公安局捐赠集群对讲机

摩托罗拉向天津市公安局捐赠集群对讲机近日，摩托罗拉公司无线电对讲机部向天津市公安局捐赠３０部ＰＴＸ６００型集群无线电对讲机，来加强市局在日常工作中的指挥调度和协调联络。这是摩托罗拉公司以先进的通讯技术支持我国公安部门的现代化和正规化建设的又一实际举措...     

摩托罗拉对讲机及原装配件店哈尔滨隆重开业

摩托罗拉公司企业移动解决方案部日前宣布,位于哈尔滨市百脑汇的两家摩托罗拉对讲机及原装配件店隆重开业。此次开业的是分别属于黑龙江威讯科技开发有限公司以及黑龙江铭阳天下科技发展有限责任公司的两家对讲机及原装配件店。     

摩托罗拉数字集群2005年中国成果媒体见面会

摩托罗拉（中国）电子有限公司政府及企业移动解决方案部于11月30日在北京举办了摩托罗拉数字集群2005年中国成果媒体见面会。摩托罗拉政府及企业移动解决方案部北亚区总经理周源星出席了此次活动，并在演讲中介绍了2005年摩托罗拉数字集群通信系统在中国的公共安全、交通运输、港口运营以及无线政务网和商业共网等领域中所取得的各项成果以及成功应用案例。会上还展出了新近推出的数字集群终端产品，并介绍了摩托罗拉无线政务网和MEA智能型网状网的解决方案。     

用遗传算法求解基于高阶累积量的盲均衡问题

将遗传算法引入盲均衡技术领域，详细分析了如何用遗传算法求解基于高阶累积量盲均衡问题，并给出了一种求解算法的具体步骤。该算法不用基于领域知识的规则，具有很强的通用性与鲁棒性。通过计算机仿真验证了该算法的有效性。     

Multiple-access channels with memory with and without framesynchronism

The capacity region of frame-synchronous and frame-asynchronous, discrete, two-user multiple-access channels with finite memory is obtained. Frame synchronism refers to the ability of the transmitters to send their code words in unison. The absence of frame synchronism in memoryless multiple-access channels is known to result in the removal of the convex hull operation from the expression of the capacity region. It is shown that when the channel has memory, frame asynchronism rules out nonstationary inputs to achieve any point in the capacity region, thereby allowing only coding strategies that involve cooperation in the frequency domain but not in the time domain. This restriction drastically reduces the capacity region of some multiple-access channels with memory, and in particular the total capacity of the channel, which is invariant to frame asynchronism for memoryless channels     

Spectrum Shaping with Alphabetic Codes with Finite Autocorrelation Sequence

In this paper we consider the problem of recoding binary data into ternary sequences for synchronous baseband data transmission systems. Our major objective is the shaping of the power spectral density of the channel process in order to combat the effects of intersymbol interference caused by the low-frequency cut-off of the channel. This motivates our interest in designing codes whose channel process has small Power in the low frequency range. Based on the MacLaurin expansion of the power density function, we use as a design heuristic the normalized second derivative Δ of the latter. To make computationally manageable the expression of Δ, we restrict ourselves to a class of codes whose autocorrelation sequence contains a finite number of nonzero terms, and present a corresponding code design algorithm. As examples, we exhibit two new codes which in many respects improve over the spectra of corresponding well-known codes.     

一种背面深槽填充P型多晶硅RC-IGBT

提出了一种新型RC-IGBT,在背面阳极处设置了填充重掺杂P型多晶硅的深槽和FOC浮空电极。器件正向导通时,利用重掺杂P型多晶硅与N型衬底的接触电势差,将槽间的N型衬底部分耗尽,增强了阳极PN结的短路电阻,在较短背面阳极尺寸的条件下实现了RC-IGBT在开启过程中不出现电压折回现象。在器件反向开启过程中,空穴电流经过FOC浮空电极流入P型多晶硅,降低了多晶硅与N型衬底之间的势垒,提高了反向二极管的开启速度,降低了开启过程中二极管的过充电压。仿真结果表明,提出的新型RC-IGBT完全消除了电压折回现象,反向电流的均匀性得到了提高。相比于传统RC-IGBT,该新型RC-IGBT的元胞背面尺寸减小了88.89%,关断损耗降低了26.37%,反并联二极管的反向恢复电荷降低了13.12%。     

Terahertz imaging with bow-tie InGaAs-based diode with broken symmetry

A silicon-lens coupled bow-tie InGaAs-based diode with broken symmetry is demonstrated for terahertz imaging applications below 1 THz at room temperature. Transient features and the dynamic range of the bow-tie InGaAs-based sensor are explored experimentally, proving the possibility to use the device in real-time imaging systems. Response time is found to be less than 7 ns, responsivity of 0.1 mA/W, and noise equivalent power of 5.8 nW/radicHz.     

Low-power MOS integrated filter with transconductors with spoiltcurrent sources

It is shown that an MOS weak-inversion differential pair can be linearized considerably by replacing the tail current source with a MOSFET biased in the weak-inversion triode region. Calculations show that the transconductance can be kept constant to within +5%/-0% for input voltages up to 130 mV. This linearized differential pair is used in a third-order transconductance-C bandpass filter with 18 Hz and 142 Hz cutoff frequencies, which draws 4.9 nA from a 1.8-V supply. Its dynamic range is 62 dB and its active area is 0.5 mm²     

一种给批量汉字加注带有声调拼音的方法

由于汉字存在着多音字的情况,所以给汉字加注带有声调的拼音带来了困难.为了解决这一问题,设计了单字与词语相结合的加注方法.首先构建了带有声调的拼音字典和词典,拼音字典中同一个多音字的拼音按照使用频率进行排放,并且对词典中的词语按照最后一个字进行了索引;然后设计了基于整词二分的二层索引结构,实现了改进的最大逆向分词算法;最后设计了三种实验方案,进行了对比实验.实验结果表明,在没有使用该方法前它的错误率为11%,使用后错误率下降为0.09%.     

Anisotropy of composite materials with inclusion with orientation preference

In this paper, the quasicrystalline model and the differential evolution strategy are applied to analyze the effective electromagnetic properties of composite materials with aligned nonspherical inclusions. The relationship between the effective wave number, volume concentration, direction of wave propagation vector, and aspect ratio of the inclusion particle are numerically studied. It is found that composite materials with small inclusion particles behave like uniaxial material. In addition, we observed general effective anisotropy in composite materials with larger inclusion particles.     

Feedback with carry shift registers synthesis with the Euclidean algorithm

Feedback with carry shift registers (FCSR) were introduced by Klapper and Goresky (1994). They are very similar to classical linear feedback shift registers (LFSR) used in many pseudorandom generators. The main difference is the fact that the elementary additions are not additions modulo 2 but with propagation of carries. The mathematical models for LFSR are equivalently linear recurring sequences over GF(2) or rational series in the set GF(2)[[x]]. For FCSR, the "good" model is the one of rational 2-adic numbers. It is well known, that the series generated by a LFSR can be synthesized by either the Berlekamp-Massey algorithm for binary linear recurring sequences or the extended Euclidean algorithm in the set GF(2)[x] of binary polynomials. Klapper and Goresky (1997) give an algorithm for the FCSR synthesis. This algorithm is similar to those of Berlekamp-Massey and is based on De Weger and Mahler's rational approximation theory. In this correspondence, we prove that it is possible to synthesize the FCSR with the extended Euclidean algorithm in the ring /spl Zopf/ of integers. This algorithm is clearly equivalent to the previous one, however, it is simpler to understand, to implement, and to prove. Our algorithm is still valid in the case of g-adic integers where g is a positive integer. We also give a near-adaptative version of this algorithm.