查询词典 power transmission

Based on power line transmission characteristic, this thesis set up a power line model using theory of uniform transmission line; design low voltage communication simulation and experiment system based on the model.

本课题基于电力线传输特性的分析，应用均匀传输线理论建立了电力线模型，设计了以该模型为基础的低压电力线载波通信模拟实验系统。

A mathematical cascade model of 35 kV power transmission line with concentrated parameter is developed and a multiple modules coupling model of this power transmission system fit for digital real-time simulation is further presented on the basis of known model of synchronous machine and composite load.

建立了35kV输电线正常运行状态级联集中参数数字仿真的数学模型，并在已知同步发电机、变压器和综合负载模型的基础上，进一步提出了适合于35kV馈电系统数字实时仿真的多模块耦合模型，同时给出了相应的数字积分方法。

Make use of the tested data, the paper analyzed the vehicle output power, the efficiency of colligated transmission system, the power distributing on the process of turning, the roads and the pedrail influence on the torque, and the torque changing rules on the vehicle starting, changing transmission ratios, accelerating and braking, obtained the well-content result, it provide a powerful theoretical and technical support for the armored vehicle designed and make approved on.

利用测得的转矩和转速数据，对车辆的输出功率，综合传动的效率，转向过程的功率分配，路面及履带对转矩的影响以及起动，换档，加速，制动过程转矩变化情况进行分析，取得了十分满意的结果，为进一步对车辆进行改造和设计提供了强有力的理论和技术支持。

High-phase order power transmission is an important method to increase the power density because it can obviously decrease the surface potential gradient of the transmission conductor.

多相输电能够明显地降低导线表面的电位梯度，是提高输送功率密度的重要方法。

ABSTRACT Multi-phase power transmission is an important method to increase the power density transmitted, because the potential gradient of the transmission conductor surface can be obviously decreased.

多相输电能够明显地降低导线表面的电位梯度，是提高输送功率密度的重要方法。

Transmission lines are the vitals of electric power system. With the development of electric power system, transmission lines must be more economic, secure and reliable.

输电线路是电力系统的命脉，电力系统的发展对其经济性、安全性和可靠性提出了更高的要求。

For high performance products, competitive price and unique solution in each application field, KEB now become an important role in power transmission field in China. KEB Power Transmission Technology Co., Ltd is began to construction in Songjiang, Shanghai since May 2007 and will be get into operation in June 2008, and will become KEB production supply center for whole Asia Pacific area.

由于其高质量的产品、合理的价位、并在相关行业中配套方案有独到之处，KEB已经成为中国市场传动系统供应商中的又一支生力军，KEB的技术将支持客户始终站在行业发展的最前沿。2007年5月科比公司于上海松江的工厂开始建设，预计2008年6月建成投产，届时中国科比的上海生产基地将成为科比公司在亚太地区的供货中心。

Taking the development platform of HVDC power transmission for example, the calculation result of impedance-frequency characteristic of traditional line commutated converter and that of FCC are compared. Simulation results show that the impact of impedance-frequency characteristic of converter on the resonance frequency of AC system is not negligible, and FCC can enhance the strength of AC system in a certain extent, improve system stability and effectively reduce AC equivalent impedance under resonance frequency, thus the harmonic instability of HVDC power transmission system can be avoided.

以直流输电开发平台为例，对传统电网换相换流器(line commutated converter，LCC)与FCC的阻抗频率特性计算结果进行对比，仿真结果表明换流器的阻抗频率特性对交流系统的谐振频率有着不可忽略的作用，FCC在一定程度上提高了交流系统强度，改善了系统稳定性，有效降低了系统谐振频率下的交流等值阻抗，从而更好避免直流输电系统谐波不稳定现象的发生。

The paper analyses the application mode development and demand of electric power communication transmission network ,and introduces ECI BG-40 which inosculates MSTP and PCM,and discusses a new type of application mode of electric power communication transmission layer network,which inosculates MSTP and PCM and offers reference for construction of el.

文章在分析了电力通信传输网应用模式发展及需求的基础上，对ECI公司最新推出的集MSTP+PCM功能于一体的BG-40产品进行了介绍，探讨电力通信传输网一种新型的网络应用模式，这种PCM+SDH的网络融合的组网新模式，将为电力通信网传输层网络的组网提供很好的参考。

At first, setting up the arith relation between the signal input and the signal output of the generalized multi-carrier system of the Discrete Fourier Test spread-spectrum; then setting equilibria parameters of the frequency field equilibria subcarrier of the generalized multi-carrier system of the DFT spread-spectrum according to channel frequency response, channel noise variance and equilibria method; then calculating average power of useful signal, interferential average power between signals as well as noise variance of the generalized multi-carrier system receiving terminal of the DFT spread-spectrum according to the arith relation as well as the frequency field equilibria parameter, and recomputing available signal information noise ratio, so as to calculate the available signal information noise ratio of the generalized multi-carrier transmission system accurately, the method for estimating the available signal information noise ratio can be used for link self-adapting transmission solution of the generalized multi-carrier system based on Discrete Fourier Test spread-spectrum and radio material management.

一种DFT扩频的广义多载波系统的SINR估计方法，其通过首先建立所述离散傅立叶变换扩频的广义多载波传输系统的信号输入输出之间的数学关系，然后根据信道频率响应、信道噪声方差和均衡方法，设定所述DFT扩频的广义多载波传输系统的频域均衡子载波的均衡系数，再根据所述数学关系及所述频域均衡系数分别计算所述DFT扩频的广义多载波传输系统接收端有用信号的平均功率、信号间干扰的平均功率以及噪声方差，再计算有效信干噪比，如此以实现对广义多载波传输系统的有效信干噪比的准确计算，该有效信干噪比估计方法可用于基于离散傅立叶变换扩频的广义多载波传输系统的链路自适应传输方案和无线资源管理方面。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。