dra
英
美
abbr. Doppler radar 多普勒雷达; dead-reckoning analyzer 航位推测分析器
复数：dras
BNC.31306
双语例句
- 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。 - On the basis of case studies on coal waste spoils in coal mine for groundwater pollution, the influence factors of groundwater vulnerability have been analyzed.
结合采煤矿区地下水污染的实际情况，分析了地下水脆弱性的影响因素，采用数学模型和DRASIC评价指标体系法对矿区地下水脆弱性进行初步研究。 - 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； - 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。 - 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。 - 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。 - Instead of that, in this work the energy operator demodulation method ( EODM) is used for DRA to extract features of rolling bearings for fault diagnosis. The principle of DRA was introduced and then the energy operator and EODM were discussed in detail.
首先介绍了共振解调法的诊断原理，然后详细论述了能量算子及能量算子解调的方法，并用该方法对406故障轴承的高频共振信号进行包络解调，准确诊断出两轴承的损伤类别。 - 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。 - The other is fed by microstrip line with a loading strip and a vertical strip is adhibited on the dielectric resonator.
第二种结构是对一负载带片的微带线馈电矩形DRA的改进，即在介质谐振器一侧贴上一块垂直金属片，金属片与微带馈线宽度相同，且连接在一起。 - 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。 - 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； - 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。 - 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。 - Restriction endonuclease Dra ⅰ and Hind ⅲ were used to digest genomic DNA in the pair matched cancerous and non cancerous esophageal tissues for Southern blot analysis.
根据序列的酶切位点分析，选择DraⅠ和HindⅢ内切酶，对配对的食管癌组织和非癌食管组织DNA酶切，Southern印迹杂交分析。 - 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。 - 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。 - 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。 - The article analyzed the deficiency of PPDR adaptive network security model, proposed a kind of new security model RPP-DRA based on active defense, designed the network security solutions of linkage, deep defense on this basis.
分析了PPDR自适应网络安全模型的不足，提出了一种新的基于主动防御的网络安全模型RPPDRA，在此基础上设计了一个联动的、纵深防御的网络安全解决方案。 - 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。 - 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。 - The ecological and environmental conditions and water quantity and quality security of the Danjiangkou reservoir matters the coordinated growth of economic and social and environmental protection in the Danjiangkou Reservoir Area ( DRA).
其生态环境状况和水质水量安全关系到库区的社会经济和环境保护的协调发展。 - 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。 - 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 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。 - 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。 - In the last, refer to research on main modules in perceptual audio coding system and materials about DRA standard, a platform that could provide a test platform for further study on audio coding system is built.
最后基于对感知音频编码主要模块的研究，参考DRA音频编解码规范，搭建了DRA编码器平台，为后续的音频编码中算法研究提供了测试平台。 - 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 drag-reducing characteristics of the DRA polymer could be widely used in regional cooling and heating systems, oil transportation, coal mining and transportation industries and other industrial fields to save a lot of energy.
高聚物减阻剂的减阻特性可以广泛应用于区域制冷、供暖系统、石油运输、煤矿开采和运输等工业领域，从而节约大量的能源。