pdh

The Discussion about PDH & SDH Digital Microwave Transmission System

浅析PDH与SDH数字微波传输系统

Comparison of Alarm Systems for Little Capacity PDH

小容量光端机告警系统的比较

Compared with PDH , SDH is more widely used in fibre optical communication system these days .

它是目前光纤通信系统中应用最广泛的数字传输体制。

A useful optical fiber self-healing ring consisting of PDH equipment

一种实用的PDH设备构成的光纤自愈环

The Jitter and Wander Performance of PDH / SDH Equipment and System

PDH/SDH的抖动和漂移性能及有关测试问题

The Design About PDH / SDH System Incorporating

PDH/SDH系统兼容设备设计方案

Speculations on the Transition from PDH / SDH Transmission Network Monitoring System to TMN

有关PDH／SDH混合传输网监控系统向TMN过渡的几点考虑

A Realizing Method of Compatibility in Trunk Transmission System & Regulation of Circuit among PDH , SDH , WDM

干线传输系统兼容性的实现方案&PDH、SDH、WDM之间电路的调接

Transportation of MPEG-2 stream over PDH / SDH is a solution for digital video broadcasting .

利用PDH/SDH网络传输MPEG-2码流，是数字电视广播的一种解决方案。

Queries are used within PDH function calls to update the counters it manages , thereby obtaining performance data .

查询用在PDH函数调用中更新它管理的计数器，因而获取性能数据。

In the case of Performance Tester , the custom application ( pdh . dll ) uses the Advanced detail level .

在PerformanceTester的情况下，定制应用程序（pdh.dll）使用高级详细级别。

Objective : To study the imaging manifestations and clinical values of progressive disseminated histoplasmosis ( PDH ) .

目的：分析讨论播散性组织胞浆菌病的影像学表现及价值。

The evolution of transport network from PDH to SDH , and from SDH to WDM is discussed .

叙述了准同步数字传送网向同步数字传送网，同步数字传送网向波分复用（WDM）光传送网的演进过程。

This paper discussed the improvement of a digital loop filter of 2Mb / s interface in APDH ( Advanced PDH ) .

介绍了在高级准同步数字体系（APDH）中的2MBs接口的数字环路滤波器的改良方案。

With the developing and construction in these years , the power communication system has been formed its initial scale , the communication technology such as PDH , SDH and ATM etc.

通过近几年的发展建设，在电力通信网中，PDH、SDH、ATM等数字通信技术已大量使用。

After telecom communicaton 's style changed from analog to digital , the communication mode had been PDH ( Plesiochronous Digital Hierarchy ) .

电信传输方式自模拟转变为数字以来，一直沿用的是PDH（PlesiochronousDigitalHierarchy，准同步数字系列）传输方式。

Results : The regulatory domain of T-protein was located in the C-terminal 270 amino acids , which was the same location as PDH domain .

结果发现大肠杆菌T蛋白的调节结构域定位于C末端约270个氨基酸，并与其预苯酸脱氢酶结构域密不可分。

In the case of Performance Tester , a custom application ( pdh . dll ) was built using the PDH interface to enable data collection from systems running Microsoft Windows .

在PerformanceTester的情况下，用PDH接口构建定制的应用程序（pdh.dll），以从运行MicrosoftWindows系统的系统中收集数据。

Methods Density functional ( B3LYP ) method with Relativistic Effective Core Potential ( RECP ) has been used to optimize the structures of PdH and PdH_2 molecules .

方法采用数用相对论有效原子实势（RECP）和密度泛函（B3LYP）方法。

This paper begins with the brief introduction of SDH fundamental , mainly including the frame structure of STM-N and the procedure of PDH tributary signal being multiplexed into STM-N frame .

本论文首先介绍了同步数字体系SDH的基本知识，主要包括STM-N的帧结构及SDH复用原理。

Abstract : This article is an introduction to the transmission network management system for China 's national PDH long-distance trunks , which is developed by China Posts and Telecommunications Industry Corporation for Directorate-General of Telecommunications .

文章介绍由邮电工业总公司为中国邮电电信总局开发的全国长途干线PDH传输网网管系统。

In order to describe the structure of CM , PDH and regulatory domains of T-protein from E coli , the activities and stabilities were studied for separately expressed T-protein fragments .

为了进一步研究大肠杆菌T蛋白的CM、PDH和调节结构域的结构，本研究对分段克隆的T蛋白片段进行了CM、PDH和调节结构域的活性和稳定性研究。

Automatic Switched Transport Network ( ASTN ) is the second-generation intelligent transport network with the functionality of switching compared with the first generation transport network such as PDH / SDH / ATM / OTN .

相比较第一代静态传送网（PDH/SDH/ATM/OTN）技术，自动交换传送网（ASTN）是带有交换功能的第二代智能传送网，它是目前传送网技术的最新研究成果。

OTN which is located in optical layer of transport network should satisfy the relevant requirements of jitter performance in order to guarantee a proper quality of the transmitted signals , it is same as PDH and SDH network .

处于光层网络的OTN，与电层的PDH、SDH网络一样，为保证信号传送质量，对抖动性能有相应的要求。

By utilizing SDH and PDH optical cable digital communication technology , presents the overall design plan of optical fiber communication system of the rural power enterprises . Explains the technical specification and the selection of equipment . Summarizes the basic design model and its application .

采用SDH、PDH光缆数字通信技术，给出农电企业光通信系统的总体设计方案，阐述设备选型以及技术指标的确定，总结了农电企业光通信系统建设与应用的基本模式。

SDH has the unified network node interface ( NNI ), standardized information class structure in all the world and can be compatible with PDH , which makes all the transmission network systems can communicate with each other on the level of STM-N.

SDH具有全世界统一的网络节点接口，标准化的信息等级结构，能够兼容现有的PDH准同步数字系列传输系统，使得全世界传输系统能够在STM-N级别上进行互联互通。

His paper systematically introduces the basic concept of Ethernet , Ethernet media access control , physical layer performance standard , Ethernet signal frame structure , network hardware equipmen , network constitution and main performances and Ethernet signal transmitted over PDH , SDH / SONET .

系统地介绍了以太网的基本概念、介质接入控制和物理层标准规范、以太网信号的帧结构、网络硬件设备、网络组成及主要的性能，以及以太网信号在PDH、SDH/SONET中的传输等等。

This article focuses on the intelligence microwave traffic node system software for the design and realization of its main functions . It is to achieve wireless microwave terminals and PDH / SDH / Ethernet multiplexer integrated on the same platform , and provides for an SDH backbone network interface .

着重介绍了微波智能业务节点系统软件的设计和实现，其主要功能是将微波无线终端与PDH/SDH/Ethernet多路复用器集成在同一平台之上，提供一个面向SDH骨干网的接口。

The non fusion expression vector pDH endo was constructed . The recombinant human endostatin gene was expressed in DH5 α at the condition of temperature induction . The protein activities were tested by Chicken Chorio Allantoic Membrane ( CAM ) assay and endothelial cell proliferation inhibitory assay .

构建非融合表达载体pDHendo，使其在DH5α内经温度诱导表达，纯化该表达蛋白并用鸡胚绒毛膜尿囊膜实验和内皮细胞抑制实验检测其活性。

After induced by IPTG and cultured for some lime , the pDH / BL21 bacterial strain was cheeked by SDS-PAGE ( SDS polyacrylamide gel electrophoresis ) . We found that the recombinant vector expressed a new protein of which the molecular weight was about 21 kDa .

筛选得到的pDH/BL21菌株利用IPTG诱导培养后，经SDS聚丙烯酰胺凝胶电泳（SDS-PAGE）检测发现，该菌株表达有一大小约21kDa的外源蛋白。