无数字的

As a private mobile communication system, The digital trunkingmobile communication system was boomed in 1990's, and before this, the appliedprivate mobile communication systems in market are almost the analog systemwith analog voice and digital signalling. And there are no data referring to thesystem design and parameters chosen. It includes the wireless channel accessalgorithm of the mobile terminals, single base station capacity in large regional networks, link designing schemes between the switching control center and basestation as well as the study of the service quality for the multiple traffic. Theseindispensable parameters in design a digital trunking communication system arestudied in this dissertation and some instructive achievements can be got. To provethe correction of the theoretical study, the result was tested with the popularsystem of pan-European digital trunking communication system.

数字集群移动通信系统是九十年代中、后期兴起的专用移动通信系统的一种新体制，在此之前国际、国内市场使用的都是数字信令、模拟话音集群移动通信系统其涉及领域是模拟体制，对数字集群的系统设计的有关参数、方法等的选用及其性能表现并无成熟的文献可供参考，如移动终端的无线信道接入算法、大区组网单基站系统的容量、基站和交换控制中心间的链路设计和多业务种类的服务质量等都是数字集群基站子系统进行设计和开发必须解决的关键技术。

Since the signal equipments imported is unable to meet the development demand of urban rail transit, independent research of the domestic digital jointless track circuit is critical. Charateristic analysis for signal transmission of digital jointless track circuit was mainly studied in this thesis. Design digital jointless track circuit analysis software, which validated the transmission parameters could or not meet requirements of the normal, shunt and signaling states, was the key work of the research.

本文在我国引进的国外信号设备无法满足国内城市轨道交通发展的需求，并自主研发出国产化试验型数字轨道电路的背景下，对数字无绝缘轨道电路信号传输进行特性分析，并设计出数字无绝缘轨道电路分析软件，实现对特定的轨道电路传输参数验证其能否满足调整、分流和机车信号工作状态的要求。

Arithmetic ordering on two's complement machines allows + and - to work on both signed and unsigned numbers.

在二补数的机器上的算术命令允许+和-都可以在有号或无号的数字上工作。

Advocates liked the idea that the virtual world was a placeless datasphere, liberated from constraints and restrictions of the real world, and an opportunity for a fresh start.

互相网的支持者们支持这一看法，因为虚拟世界是一个无边界的数字王国，没有现实世界中的束缚和限制，是一个重新开始的绝好机会。

This figure was reported by an observer of the fight, Bartolome de las Casas, who, realising that it was difficult to credit, went on to explain that the dogs were used to disembowelling deer and boars, and so found the soft and hairless skin of Indians quite easy to bite into.

这数字是目睹战事者巴托洛梅。德拉斯卡萨斯说的。他知道难以令人置信，加意解释说，那些獒犬习惯了挖鹿、野猪等的内脏，要咬破印第安人柔软无毛的皮肤，自然不会困难。

I have never forgotten that number, and always it comes to memory attended by gibbering obscenity, peals of joyless laughter, the clang of iron doors.

我从未忘记过那个数字，它总是让我想到下流的话语，无趣的笑声，和铁门的铛啷声。

Our main products are: Digital Board with RF coaxial cables, digital bureaux symmetrical RF cables, high frequency coaxial cable, digital communications cable symmetrical, high-frequency digital transmission cables, security cables and industrial inspection, multi-structure control of an integrated multi-core cable , multimedia cables, cross-linked communications cables, control cables, shielded cables, electrical lines installed, UL electronic lines, plant rooms and so on with flame-retardant flexible cables, common backbone network cables, network cables ordinary slip, elevator cables, instrumentation cables, PTFE high temperature cables, ultra-five twisted-pair, program-controlled switchboard wiring cables, high frequency cables, low smoke zero halogen cables, various types of flame-retardant and fire-resistant cables, nylon jacket line, car line, data transmission cables, HFC access network using coaxial cable, 75 ohm foam Physics Series, CATV coaxial cable, 50 ohm series of RF coaxial cable, low loss 50 ohm series of physical foaming coaxial cable, control cable, rubber cable sets , electric welding cables, silicon rubber cables, marine cables, mining cables, PVC insulated wire and cable, computer cable, power cable, electrical wiring primer, rubber insulated wire, woven wire, high temperature wire, XLPE cables ship cables, high temperature cables, such as fire, at the same time to take a special type electric wire and cable products specifications to develop a business.

公司主要产品有：数字局用同轴射频电缆，数字局用对称射频电缆，高频同轴电缆，数字通信对称电缆、高频数字传输电缆、保安与工业检测电缆、多重结构多芯控制综合电缆、多媒体电缆，交联通信电缆，控制电缆，屏蔽电缆，电器安装线， UL电子线，机房等场合用阻燃软电缆，普通主干网络电缆，普通支路网络电缆，电梯电缆，仪器仪表电缆，聚四氟乙烯高温电缆，超五类双绞线，程控交换机配线电缆，高频电缆，低烟无卤电缆、各类阻燃和耐火电缆、尼龙护套线、汽车线、数据传输电缆，HFC接入网用同轴电缆、物理发泡75欧姆系列、CATV同轴电缆、50欧姆系列RF同轴电缆、低损耗物理发泡50欧姆系列同轴电缆，控制电缆、橡套电缆、电焊机电缆、硅橡胶电缆、船用电缆、矿用电缆、聚氯乙烯绝缘电线电缆、计算机电缆、电站用电缆、电机引接线、橡皮绝缘电线、编织电线、高温导线，交联聚乙烯电缆船用电缆、耐高温防火电缆等，同时承接特殊型号规格电线电缆产品的研制、开发等业务。

Admittedly, half of this impressive number was comprised of either hopelessly outdated Renault FT tanks, unarmed tracked supply carriers or ramshackle tankettes and armoured cars, but some two hundred marginally useful tanks, mostly Skoda S-II-as together with seventy-odd Renault R-35s, half having been obtained when Polish Army formations were interned in Romania in the fall of 1939, provided the Royal Romanian Army's newly-constituted First Armoured Division with a modicum of an armoured force for the opening stages of the campaign.

当然，这个另人印象深刻的数字中有一半是那些古董般的雷诺FT坦克，无武装的运输车和快散架的小坦克，另一半则是差不多凑合着能用的坦克，主要是Skoda S-II-a和70几辆雷诺R-35，其中有一半是从波兰陷落后逃到罗国境内的波兰部队里扣下的。

Digital subtraction dacryocystography is a rapid, effective and noninvasive imaging technique, and it is helpful in the diagnosis, treatment and study of lacrimal duct obstruction.

数字减影泪道造影术是一种快速、效和无损伤的检查方法，在泪道阻塞的诊断和治疗中将起重要作用。

If a routine's formal parameters are untyped, numerals and true constants with numeric values cannot be used as actual parameters.

如果例程的形式参数是无类型的，那么数字和含数值的真实常量都不能作为实际参数传递。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐