直流的

For the optimization of the structure parameters and operation ones of the cylindrical three-phase cyclone with a vaned inlet and a direct-current outlet which is used for separating the mixtures of solid and liquid particles from gas flow, gas fluid field in three-phase cyclone was measured by five-hole pressure probe under two fluxes.

为了对用于液固混合物与气相分离的直筒型导叶直流式三相旋流器进行结构参数和操作参数的优化，使用五孔球探针对直筒型导叶直流式三相旋流器的气相流场在两个流量下进行了实验测定。

Various factors affecting the microhardness of nano composite deposits electroformed under direct and pulse currents are investigated,and its strengthening mechanism is also discussed.

利用SEM分析了纯镍电铸层，以及用直流和脉冲工艺所制备纳米复合电铸层的表面形貌，分别研究了影响直流和脉冲纳米复合电铸层显微硬度的各种因素，同时对纳米复合电铸层的强化机理进行了探讨。

This paper introduces the application of the induced polarization method in a copper mine of Tibet,uses the IP intermediate gradient and DC IP sounding to select three electricity unusual points,extrapolates the characteristics of its source and the polarized object through the IP characteristics and the electricity characteristics of the rocks .

本文阐述了激发极化法在西藏某地铜矿矿区的应用，通过在测区进行直流激电中梯和直流激电测深工作，圈定了铜矿区三个激电异常，结合工区的岩矿石的电性和激电特性，对其场源性质和极化体特征进行了推断和解释，从物探勘测角度对测区作出评价，为进一步开展地质工作提供依据。

Based on artificial pollution test data of standard DC post insulators and predicted pollution level, the specific creepage distance of DC post insulator and different kinds of bushings are determined.

根据标准直流支柱绝缘子的人工污秽试验数据和预估算的污秽度，确定直流支柱绝缘子和各类套管的爬电比距。

Beginning with the theory of the DC timing system,this article has built up the maths model of the reversible DC-PWM timing system with a dual-converter and dual-closed-loop,Given the details of the system design, software and hardware design, circuit structure and control algorithms using the PI process control proce- dures.

从直流调速系统原理出发，逐步建立了双闭环直流PWM调速系统的数学模型，给出了该系统的详细设计思路、软硬件设计、电路结构和采用PI控制算法的控制程序流程。

Beginning withthe theory of the DC timing system,this article has built up themaths model of the reversible DC-PWM timing system with adual-converter and dual-closed-loop,Given the details of the systemdesign, software and hardware design, circuit structure and controlalgorithms using the PI process control proce- dures.

从直流调速系统原理出发，逐步建立了双闭环直流PWM调速系统的数学模型，给出了该系统的详细设计思路、软硬件设计、电路结构和采用PI控制算法的控制程序流程。

The mathematic simulation software compiled by this paper has been used to simulate the basic characteristics of the main parts of the aircraft ac EPGS, include the permanent brushless dc generators , the exciters with rotating rectifiers, the brushless ac generators, the brushless dc generators, the inverters and the automatic voltage regulators .

运用本文建立的数字仿真软件对飞机交流电源系统的主要部件，包括永磁无刷直流发电机、旋转整流励磁系统、无刷交流和直流发电机、逆变器和调压器的基本特性进行了研究。

The pollution accumulation results of post insulator and porcelain bushing in DC yard of converter station, natural contamination test station and wind tunnel were introduced. Artificial pollution tests were carried out on the post insulators with different sheds. The artificial rain flashover tests were also carried out on the bushings with different sheds profile. The shed configuration of insulator and porcelain housing such as sheds shape, core diameter, shed pitch were analyzed and compared.

分析了换流站、自然积污站和风洞试验中支柱绝缘子和直流设备套管的积污数据，对±500kV直流系统用不同伞形支柱绝缘子进行了全尺寸的人工污秽试验，进行了瓷套管人工淋雨试验，比较了伞形参数对支柱绝缘子和瓷套管污秽性能和淋雨闪络性能的影响。

HVDC converter valve is one of the key equipment projects, in order to ensure the safety of direct current transmission project, reliable, stable operation, valve core of the system components have been imported.

换流阀是直流输电工程的关键设备之一，为了保证直流输电工程的安全、可靠、稳定运行，阀控系统的核心部件一直从国外进口。

In the light of 500 kV HVAC and HVDC,especially the problems of heavy line-lifting tool and very hugh labour intensity during live replacing the twin suspension insulator strings with single wire clip of straight circuit for heavy load HVDC,a built-up fork hook based on lever principle was developed instead of the taditional process,the double lifting lines.

针对500 kV交、直流输电线路，特别是大荷载直流输电线路直路双联单线夹悬垂绝缘子串的带电更换时，双提线工艺工具沉重，操作劳动强度极大的问题，提出利用杠杆原理研制组合杠杆叉钩卡代替双提线传统工艺，采用单绝缘吊杆挂接组合杠杆叉钩卡组成提线系统，卸去任意一串绝缘子的张力后，另一串绝缘子和提线系统共用承担导线荷载。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。