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Currently, research of parallel databases mainly focuses on relational database, and parallel environments are always based on special parallel architectures. With the rapid expanding of the markets of object-relational database, requests to parallel processing are increasing screamingly Certainly it will be significant to build a parallel objectrelational database. But it is a challenging work too.

本文分析了我国力系统运行特点及其对短期调度与运行优化提出的要求,针对调度中心能量管理系统的重要组成部分——短期调度与运行优化,应用数学规划的理论和方法,解决复杂水火系统短期经济调度中的水火计划与调度和网络运行优化问题。

Based on accurate step motor system parameters, the state equations describing step motor dynamic characteristics are set up. The operation of the self synchronization closed loop control system is simulated on computer. In the research the principle analysis and system design have been done about self synchronization closed loop operation. The relation between rotating EMF and the rotor position of the step motor is discussed. Through detecting the zero value of rotating EMF the rotor position of the step motor is indirectly obtained.

在得到准确的步进动机系统参数的基础上,建立了描述步进动机动态特性的状态方程,并对自同步闭环系统的动态特性进行了计算机仿真在论文的研究中,分析了旋转势与机位置的对应关系,通过旋转势的过零检测间接得到转子位置信号,利用这种"间接传感器"方法实现了步进动机的自同步闭环控制,论文从原理分析和系统设计两方面进行了研究。

After assaying the isoelectric point of bovine thrombin, the pure semifinished product of thrombin will be obtained.

本实验的目的是采用载体两性解质pH梯度等聚焦泳的方法,结合SDS-PAGE测定牛凝血酶的等点。

A prototype microfluidic dielectrophoretic chip for cell separation and concentration based on principle of DEP was presented in this paper.

基于介泳原理,设计并制作了一种新型的能够用于细胞分离和富集的微流控介泳芯片。

Rotor winding adopt series connect complex- start unit, The winding is composed of a cage winding mainly for starting and a winding operation.

转子绕组由起动和运行两套绕组组成,从而使转子达到无集环、无刷、无触点和无起动阻。

The machine stator is designed to affiliated stator winding which binded by multi-lines equaled to 60 degees. Rotor winding adopt series connect complex- start unit, thereby let the rotor work without collector rings,motor brush, touched point and starting resistance.

新型绕组机定子设计成多路联结的等效60°相带定子绕组,转子绕组为采用串联的"复合线圈组",从而使转子达到无集环、无刷、无触点和无起动阻。

In each kind of battery solution servosystem, the battery solution servosystem which is composed by the PWM solenoid valve, has many unique merits.

在各种液伺服系统中,由PWM磁阀组成的液伺服系统,具有许多独特的优点。

Four of the tunes feature electric guitar, with some lively electric and string bass by sideman Billy Peterson, who also contributes touches of percussion, synth, piano and, on one piece, Farfisa organ.

四是音乐功能的吉他,一些活泼和低音提琴的伴奏比利彼得森,谁也促进了打击乐,合成器,钢琴涉及,并在其中一部份,Farfisa器官。

According to these theories, a special mechanical test platform is established, the design and debugging of the temperature signal processing board are finished and the data acquisition and analysis system about the High speed motorized spindle is established based on the PC and data acquisition card.

在上述理论研究的基础上,搭建了高速主轴专用的机械平台,完成了温度信号调理板的设计与调试,并构建了基于PC+数据采集卡的高速主轴数据采集及分析系统。

We got the simple and high accurate eigenvalue equations and cutoff frequency formulae of all propagation modes. Second, to the optical fiber with homogeneous cladding, we defined the "permittivity ratio", and we got the simple and high accurate connection of cutoff frequency to the ratio. Third, to the fiber with inhomogeneous cladding, we analyzed the dispersive and power-frequency characteristics.

第二,对于具有各向同性包层的弱渐变光纤,引入了介比,找到了精度高且形式简洁的截止频率对折射率参数的依赖关系;第三,对于具有各向异性包层的弱渐变光纤,首次通过包层的轴向与横向的介常数比分析了该类光纤的色散和功率特性。

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I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像,后来回台湾,甚至去年在北京,居然也四处看见她的海报,才惊讶她的魅力之大。

Ah may dee:You are chinese living in a democratic country.

你是居住在民主国家的中国人吧。