dra

This research provided guarantee for industrialized producing of DRA .

本研究为减阻剂的工业化生产提供了可靠保证。

Field experiment results show that different volumes of DRA added can increase oil throughput of the pipeline and improve the safety of pipeline operation .

结果表明，添加不同量的减阻剂均可获得较好的减阻增输效果，并能提高管道运行的安全性。

Therefore , the study of DRA was of great significance for national economy .

研究高聚物减阻剂对国民经济有很重要的意义。

The mechanism , development , pilot testing and field test of EP DRA are introduced .

介绍了EP系列减阻剂的作用机理、研制方法、中试生产和现场实验的概况。

This paper also concerns mobile access QoS provisioning , and an explicit DRA algorithm .

此外，本文还涉及移动接入时的QoS保障问题，并对动态资源调整算法进行了详细阐述。

Construction and package of retroviral vector encoding HLA DRA gene

HLA-DRA基因逆转录病毒载体重组质粒的构建和包装

DRA-3 compared with other DRA algorithm , with the maximum channel utilization .

DRA-3与其他DRA算法相比，具有最高信道利用率。

In the second multifunction part , the idea of using the DRA as an oscillator load is proposed .

在第二个多功能部分，提出了使用介质谐振器天线作为振荡器负载的思想。

Objective To investigate the prevalence and risk factors of dialysis-related amyloidosis ( DRA ) .

目的了解长期血液透析（HD）患者透析相关性淀粉样变（DRA）的发病率和相关因素。

Objective To evaluate the value of high resolution ultrasound diagnosing on the dialysis related amyloidosis ( DRA ) .

目的研究透析相关性淀粉样变（DRA）的声像图特点，评价超声技术对DRA的诊断价值。

The forecasting results showed that if no regulatory measures , the ecological environment may deteriorate further in 2020 in the DRA .

经预测，如果不采取生态安全调控措施，与2007年相比，2020年库区的生态环境可能进一步恶化。

The curing characteristics of NEPE composite solid propellant slurry were investigated by the dynamic rheological analysis ( DRA ) .

从推进剂药浆固化的动态流变特征出发，用DRA动态流变学方法研究了硝酸酯增塑聚醚推进剂的固化反应动力学。

Second , the author measured the DRA by synthesized through small scaled experiment and middling experiment and evaluate their comprehensive function .

其次，测定了小型试验、中间试验合成的一系列减阻剂的减阻性能，并对减阻性能进行了综合评价。

On this basis , the geographic-position-based satellite communications network is proposed , in which the DRA routing algorithm is used .

在此基础上，提出了基于地理位置的卫星通信网络，空间网络部分使用DRA路由算法。

EP-W203 / H DRA is a ultra-high molecular polymer , which can reduce the pressure loss of pipe flow .

EP&W203/H型减阻剂是一种超高分子聚合物，注入管道后可以降低管流的压力损失。

Working area for drag reduction agents ( DRA ) is in turbulence area , and it can reduce resistance as well as increase transportation effectively .

减阻剂的作用区域在流体的湍流区，它能有效的降低流体阻力增加流量。

Lygodium japonicum ; polysaccharide ( PSA ); response surface methodology ( RSM ); dimension reduction analysis ( DRA );

海金沙草；多糖；响应面分析；降维分析；

Aimed at the fault of the Taguchi method , the paper investigates the parameter design problem from an economic point of view in the base of DRA .

针对田口方法的不足，本文在双因子方法DRA（dualresponseapproach）的基础上从经济的角度讨论了参数设计问题。

The synthesis method , effect of initiator on the monomer conversion , drag reducing rate of associating DRA and anti-shearing performance were researched .

本文主要合成一种新型抗剪切减阻剂，并对其合成方法、引发剂对聚合单体转化率的影响、缔合减阻剂减阻率及抗剪切性能的比较等进行了实验研究。

Objective To discussing the clinical manifestation , diagnosis and treatment of the dialysis-related amyloidosis ( DRA ) in the long-term hemodialysis patients .

目的探讨长期血液透析患者透析相关淀粉样变（Dialysisrelatedamyloidosis，DRA）的临床及诊治方法。

With the wide application of rubber and poly α - olefin drag reducing agent ( DRA ), there are more requirements on the polymer analysis .

橡胶和聚α-烯烃减阻剂的广泛应用，对高分子材料的分析测试提出了更多的要求。

The site application results show that applying HG DRA not only obtain satisfactory drag reduction effectiveness and increase transportation capacity of pipeline , but also ensure the safe operation .

现场应用结果表明，添加HG减阻剂不仅具有较好的减阻效果和增输能力，提高了输送的经济效益，同时保证了输油生产安全平稳运行。

The analysis results show that DRA can remarkably increase the transportation capacity of pipeline and decrease the operating pressure of pipeline and the load of transportation equipment in some extent .

分析结果表明，添加减阻剂能够显著提高管道的输送能力，在一定程度上可以降低管道的运行压力和输油设备的负荷。

Without DRA , the height of liquid film increases with increasing in superficial liquid velocities , which leads to an increase in the slug frequency and corrosion rate .

未加降阻剂时，液体折算速度增大，导致液膜厚度增厚、段塞频率增大、管壁腐蚀速率加剧；

No more than two sequences were found in each individual at the DRA locus , strongly suggesting only one DRA locus was amplified in this study .

每个个体均不多于两种DRA序列，提示鲸类的DRA座位是单拷贝的基因。

With the rapid development of petroleum industry , high molecular polymers as drag reduction agents ( DRA ) have been widely used in conduits during the transportation of crude oil .

随着石油工业的发展，超高分子量聚合物作为原油输送减阻剂在国内外输油管线中得到日益广泛的应用。

This article summarizes the development of the fiber optical Raman amplifiers and theory and features of distributed fiber Raman amplifier , mainly describes the combined application of EDFA and DRA .

概述了光纤喇曼放大器的发展情况、分布式喇曼放大器的原理和特性，重点阐述了掺铒光纤放大器与喇曼放大技术的组合应用；

By this method dynamic parameters of producers and in injecters can be used to estimate the reservoir pressure and dra - inage radius without well shut-in .

使用该方法，可以在不关井的情况下，用油水井动态参数，获得油井地层压力和驱动半径。

Finally the article states that the combined application of DRA and EDFA can significantly increase the function of long distance transport system of fiber optical and hence enlarge the applicable area of EDFA .

最后指出，这两种技术的组合应用能明显提高长距离光纤通信系统性能，使掺铒光纤放大器具有更广阔的应用前景。

A brief introduction to MLSSA ( Maximum-Length Sequence System Analyzer ) is presented , which is developed over the MLS signal theory by DRA laboratories , U.S.

介绍美国DRA实验室研制的基于最长序列MLS信号测试技术的扬声器电声分析系统MLSSA。