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service
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  业务
    Study on Mechanism of QoS Guarantee for CATV Broadband Integrated Service Network
    有线电视宽带综合业务网的服务质量保证机制研究
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    Intelligent Image Processing Theory and Its Application Research on Wireless Multimedia Service
    智能图像处理及其在无线多媒体业务中的应用
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    Research on NGN Service Control Capability
    下一代网络业务控制能力的研究
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    Research on Some Key Technologies for NGN Core Service Platform and IMS Stateful Proxy
    NGN核心业务平台及IMS保留状态代理中若干关键技术的研究
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    Research on Service Context Awareness and Adaptation in Virtual Home Environment
    虚拟归属环境下业务上下文感知与适配研究
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  业务的
    A Service Control Point Which Can Provide the E800 Service
    一种可提供E800业务的业务控制点
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    Technical Considerations on the Access of ISDN Packet Service
    接入ISDN分组业务的技术考虑
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    Motorola to Develop Open Protocol for New Cellular Service Offerings
    摩托罗拉将推出蜂窝新业务的开放式协议
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    An ATM Adaptation Protocol Implementation Scheme for Connectionless Service
    一种支持无连接业务的ATM适配层协议实现方案
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    ATM Network Adaptation Layer Protocol for Supporting User Service
    支持用户业务的ATM网络适配层协仪
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  “service”译为未确定词的双语例句
    Researches on the Dynamic Control and Management of Quality of Service for ATM Networks
    ATM网络服务质量的动态控制及管理的研究
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    Study on End-to-End Congestion Control and Quality of Service of Networks
    端到端的网络拥塞控制及服务质量研究
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    Research on the Key Technologies of Quality of Service in Wireless Multimedia Networks
    无线多媒体网络服务质量关键技术研究
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    Research on Model of Intelligent Space and Quality of Service Unicast Routing in Model Network
    智能空间的模型与其网络服务质量单播路由的研究
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    A Simple and Yet Effective Method for Prolonging the Service Life of FU-113 Vacuum Tube
    一种延长FU-113管子寿命的简单而有效的方法
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  service
In this paper exhaustive-service priority-M/G/1 queueing systems with multiple vacations, single vacation and setup times are studied under the nonpreemptive and preemptive resume priority disciplines.
      
Finally, another physical meaning of the service rate is given.
      
An M/G/1 retrial queue with second multi-optional service, feedback and unreliable server
      
An M/G/1 retrial queue with two-phase service and feedback is studied in this paper, where the server is subject to starting failures and breakdowns during service.
      
Primary customers get in the system according to a Poisson process, and they will receive service immediately if the server is available upon arrival.
      
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The resalts of developoment, design and testing of zinc air battery for signal hand-lamp used in railway service are reported together with important features in design and testing of replaceable anode construction (or mechanically rechargeable construct ion) of cells. Batteries of this sort have been produced in factory.

本文报导了铁路手提信号灯锌空气电池电源的设计、研制、试验的结果,并报导了有关插拔式电池(机械充电)的试验和设计的要点。该电池业已在工厂试生产成功。

In the field of post and communication, the papers about appli- cation of the theory of quality control are seldom seen. This paper discusse the problem of application of quality control, especially the control chart in the field of post and communication. Due to fluctuations of the quantity of demand, in applying control chart, we must do regression analysis of the quality index and the quantity of demand. If the regression is significant, then we must use the selecting control charts proposed by the author....

In the field of post and communication, the papers about appli- cation of the theory of quality control are seldom seen. This paper discusse the problem of application of quality control, especially the control chart in the field of post and communication. Due to fluctuations of the quantity of demand, in applying control chart, we must do regression analysis of the quality index and the quantity of demand. If the regression is significant, then we must use the selecting control charts proposed by the author. Otherwise, the Shewhart's control charts can be used. From the viewpoint of the theory of queue, the system of post and comnun- ication is a system of queue. Hence, the problem that the quality index and the quantity of demand is correlated or not, under the given conditions and within certain limit of the quantity of demand, depend on the characteristics of the system of queue. If the system is of random arrival and service in batch, then it is not correlated in general; if the sgstem is of random arrival and service in order (including the case with priority), then it is correlated in general. The theory presented in this paper has succeeded in the control of over-limit rate and register return rate of long-distance telephone, and begin to be used in Peking, Shenyang and Hupei etc, According to the statistical data in practice, the accuracy of allarm of this selecting control chart is about ten times higher than the Shewhart's control chart. As to the maintenance, this paper lays stress on the importance of correctve maintenance that is cortrolled by the method of quality control. At the end of this paper, it is pointed out that the feature of the industry of post and communication is "more variety, less quantity". Hence it is effective to apply unitedly the same control chart for different cases, provided that the com- mon points in production is grasped. In this paper, many practical examples solved by the author are also included which may be of use to the reader for reference.

在国内外文献中,关于质量控制在邮电部门中的应用很少见。本文专门论述了质量控制,尤其是控制图在邮电各个部门中应用的问题,希望对于我国邮电部门当前推广应用质量控制有所裨益。在邮电通信部门,由于邮电业务量波动的影响,所以在应用控制图时,需要对质量指标和业务量进行相关分析,若有显著相关,则必须采用作者所提出的选控控制图,否则可用休哈特(W.A.Shewhart)控制图。从运筹学排队论来看,邮电通信部门是个排队系统。因此,被控制质量指标与通信业务量是否相关这个问题,在现有的人员设备条件下,在一定的业务量范围内,主要决定于排队系统的特性。若排队系统为随机到达、成批服务,则一般不相关:若排队系统为随机到达、按序服务(包括具有优先权的情况在内)则一般相关。选控控制图已在控制长话逾限率和退号率等方面获得成功,根据北京、沈阳、湖北郧阳等地使用结果证实,选控控制图发现问题的准确度要比Shewhart控制图高十倍左右。在邮电维护方面,本文强调了引进质量控制方法的受控纠正性维护方式的重要性。本文最后指出,邮电工业的特点是“多种少量”,因而抓住加工或生产中的共同点,统一应用控制图是有效的措施。本文附有若干应用实例,大多是作者所解决的实际...

在国内外文献中,关于质量控制在邮电部门中的应用很少见。本文专门论述了质量控制,尤其是控制图在邮电各个部门中应用的问题,希望对于我国邮电部门当前推广应用质量控制有所裨益。在邮电通信部门,由于邮电业务量波动的影响,所以在应用控制图时,需要对质量指标和业务量进行相关分析,若有显著相关,则必须采用作者所提出的选控控制图,否则可用休哈特(W.A.Shewhart)控制图。从运筹学排队论来看,邮电通信部门是个排队系统。因此,被控制质量指标与通信业务量是否相关这个问题,在现有的人员设备条件下,在一定的业务量范围内,主要决定于排队系统的特性。若排队系统为随机到达、成批服务,则一般不相关:若排队系统为随机到达、按序服务(包括具有优先权的情况在内)则一般相关。选控控制图已在控制长话逾限率和退号率等方面获得成功,根据北京、沈阳、湖北郧阳等地使用结果证实,选控控制图发现问题的准确度要比Shewhart控制图高十倍左右。在邮电维护方面,本文强调了引进质量控制方法的受控纠正性维护方式的重要性。本文最后指出,邮电工业的特点是“多种少量”,因而抓住加工或生产中的共同点,统一应用控制图是有效的措施。本文附有若干应用实例,大多是作者所解决的实际问题,可供参考。

Within a single radio service area, the lower limit for the number of bandwidth-channels free from third-order intermodulation interference is here discussed.Then a computer method for calculating third-order compatible channel difference sequences for the same area is suggested.The result shows that the given lower limit approximates well to the minimum value of the number of bandwidth-channels for third-order compatibi lity. Thus the time of computation to solve third-order compatible channel diffrence...

Within a single radio service area, the lower limit for the number of bandwidth-channels free from third-order intermodulation interference is here discussed.Then a computer method for calculating third-order compatible channel difference sequences for the same area is suggested.The result shows that the given lower limit approximates well to the minimum value of the number of bandwidth-channels for third-order compatibi lity. Thus the time of computation to solve third-order compatible channel diffrence sequences can be shortened.This paper presents a table of channel difference sequences which enables the designer of a mobile radio network to allocate channel frequences free from interfering third-order intermodulation products.

本文主要讨论单个无线电区中无三阶互调干扰的带宽信道数下限值和用高速数字计算机计算三阶相容信道差值序列的方法。结果表明,给出的带宽信道数下限值与三阶相容性的带宽信道数最小值接近,从而,为求得三阶相容信道差值序列缩短计算时间。本文提供的信道差值序列表可使移动无线电网路设计者分配无三阶互调产物干扰的信道频率。 在多信道无线电通信系统中,如果将许多信道引进到某一无线电区内,就必须使发射机集中安放。然而发射机在同一地区的集中安放将引起各种干扰[1,2,3]。以接收机为例,当在给定的频率上接收机同时收到两个或两个以上的高电平无用信号时,便出现互调干扰。因此,在划定的无线电区内正确地选择频率使这种互调干扰减少到最低程度,是设计通信系统的一个重要问题。

 
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