查询词典 delta connection

This paper analyzes the characteristic of the Power Factor Correction of arc welding inverter power source , introduces the 12-pulse converter based on delta-type autotransformer connection into arc welding inverter power source ,and its configuration, design scheme and theory on PFC.

分析了弧焊逆变电源功率因数校正技术的特点，阐述了弧焊逆变电源中基于差接三角形自耦变压器十二脉波整流电路的原理与设计及其功率因数校正机理。

Is article presents the equivalent replacement formulas for solving complicated ventilation network by introducing the equivalent replacement principle of delta- star connection in complex circuits to the study of mine complicated ventilation network and has been applied successfully.

把复杂电路中三角形与星形联接等效变换原理引入矿井复杂通风网络的研究，导出解复杂风网的等效变换公式，并运用成功。

Engine, wing and shot up connection, delta-wing aircraft with the tail connected by a full-time production workers.

发动机，托杆与机翼连接，三角翼尾翼与机身连接，由一名工人专职制作。

With Yangtze delta tidal flat as an example, through the analysis on the magnetic characteristics of tidal flat sediment and the study on the space distribution of heavy metal elements, this thesis discussed the impact to Shanghai sea bank brought by heavy intensity development, and the interrelation between sediment power effect and heavy metal pollution space distribution. Utilizing the advantage of artificial intelligence neural network, in conjunction with environmental chemical analysis, from the angle of view of sediment magnetic characteristics, it analyzed the connection mechanism between magnetic mines and heavy metal element within tidal sediments, and built a quantitative magnetical diagnosis model, in attempt to calculating the tidal heavy metal pollution status from the magnetic measurement data of sediments and assess it's impact to the environment.

中文题名长江口潮滩重金属污染的磁诊断模型研究副题名外文题名论文作者许羽导师俞立中教授学科专业自然地理学研究领域\研究方向资源与环境信息系统学位级别博士学位授予单位华东师范大学学位授予日期2001 论文页码总数111页关键词长江口潮滩沉积物环境磁学重金属污染馆藏号BSLW /2001 /X145 /11 本文以长江口南岸潮滩为例，通过对潮滩沉积物磁性特征的分析、重金属元素空间分布的研究，探讨了上海滨岸带高强度开发对潮滩环境质量的影响，以及沉积动力作用与重金属污染空间分布格局的联系。

Teng Feng Hardware Factory is located at the bank of Tan Jiang River in Jiangmen City Xinhui Area where west to the Pearl River Delta. To the east there is a national grade cargo berth—Xinhui Silver Lake cargo berth and a connection of superhighway which goes the to west coast and directs to Hong Kong and Maco.

腾锋五金厂地处珠江三角洲西部江门市新会区的潭江河，东有国家级码头新会银洲湖客货运码头和西部沿海高速公路接口，直达香港、澳门，西有广湛高速公路接口，水陆交通十分畅通方便。

Tourism Industry becomes the deepest one of the joint developments in the integration processes of the Yangtze River Delta because of the strong connection characteristic.

面临旅游市场进一步开放带来的压力，在长三角打造区域无障碍旅游圈的发展目标体系下，如何更好地发展长三角区域旅游产业、更好地协调长三角区域旅游发展，这些问题成为当前许多学者、企业家等共同探索的焦点。

As the MSA Information System and the MSA Information System have put in operation, this paper is try to design and plan the electronic maritime endorsement system in Yangtze River Delta, emphasizing on the connection of the different information system.In principle, the Yangtze River Delta maritime endorsement system is a long project .It should be divided into several stages and set different objects for each stage .

鉴于交通部海事局全面启动和已部分实施&水监信息系统一期&工程和&水监信息系统二期&工程，本规划和设计选定长三角地区船舶电子签证系统规划和设计作为课题，着力研究在长三角地区率先实现不同海事机构签证信息系统的联网，从而使区域性海事一体化管理有了可能。

The evolution of the economic region of the Pan-Yangtze river delta has close connection with the Yangtze-river,the Double-Bridge Economic Belt along the New Euro-Asia Continental Bridge at the East of Xi'an city and other important transport beam.

泛长三角经济区空间结构演化与长江、新亚欧大陆桥西安以东双陆桥等重要交通束有紧密关系。

On the basis of comparing the feature of inrush current's grille curve with that of fault current, a novel transformer protection scheme is proposed, which is not affected by add-assist circulation current at delta side on Y/D connection transformer.

在比较励磁涌流与短路电流网格曲线各自特点的基础上，提出了一种新型变压器保护方案，该方案不受Y/D接线的变压器D侧环流助增作用的影响。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。