查询词典 power frequency

High frequency technology has been widely applied to power supply. So, it is possible to make high frequency power supply for X-ray diffractometer.

高频技术已经广泛应用到了电源制造领域，因此，研制X射线衍射仪高频高压电源成为了可能。

Nowadays, the high voltage output frequency of PDP driver ICs is improved year by year, as for the increase of the panel size and the requirement of high definition image. Because the power consumption is in direct ratio to the output frequency, the significance of low power consumption design is more and more obvious

特别是随着显示图像质量的提高，以及平板显示器尺寸的增大，使得驱动芯片的工作频率不断提高，功耗也就随之增大，低功耗方面的设计就显得尤为重要。

The law, which equivalent inductance and effective permeability of magnetic core vary with field current under the excitation of high frequency and large power, is discovered, and this will offer an important reference for the reasonable selection and effective use of material in the design of high frequency large power magnetic components.

在对高频功率磁元件测试中的影响因素进行深入研究的基础上，推导出方波、占空比可调矩形波、单极脉冲波及周期变化的任意波激励下磁元件测试与正弦波激励情况的等效，为解决磁元件在高频任意波激励下的在线检测提供了依据。

In order to improve the reliability of the nuclear Generating Sets and the stabilization of the power system, prevent the long time low frequency oscillation caused by the disturbed of the outside electrical net, assured improving the stabilization margin of the nuclear generating sets in the precondition of enough transient stability, validate the sensitivity of the parameter to the damping of Generating Sets of the MEC5220 digital excitation adjustor produce in Japan that used in the Second Project of Qinshan Nuclear Power Plant, confirm the parameter rationality of the digital excitation adjustor, optimize the parameter of PSS, in this paper, we put up a in-depth study to the principle of MEC5220 digital adjustor produce in Japan by the PSS/E software that develop by the PTI Company in the USA, completed the modeling of the excitation adjustor, PSS, generator, excitor, described the performance of this excitation adjustor, analyzed the essential reason that caused the low frequency oscillation, illuminated the factor that influence the damping characteristic of the MEC5220 digital excitation adjustor. Based on model and emulate, this paper optimized the primary parameter of the excitation adjustor, make a reasonable regulation to the PSS parameter.

为提高核电机组的运行可靠性和接入系统的安全稳定性，防止在外电网的干扰下核电机组发生长时间的低频振荡，保证机组在暂态稳定的前提下提高其稳定裕度，验证秦山核电二期核电机组所配日产MEC5220型数字式励磁调节器参数对机组阻尼的灵敏性，确定数字式励磁调节器的参数的合理性，优化PSS整定参数，本文利用美国PTI公司研发的PSS／E软件对日产MEC5220型数字调节器的原理进行进行了深入细化的研究，完成了励磁调节器、PSS、发电机、励磁机的建模，描述了该型励磁调节器的性能，分析了产生低频振荡的根本原因，阐明了影响阻尼特性的因素。

Industrial Automation Systems Division, including water pumping station frequency control system, constant pressure water supply control system, water treatment divisions and computer automatic control and information management systems; power plant coal feeder, give powder machines, pumps and fans, etc. The frequency control system, auxiliary power plant control system (including the coal handling, water and ash of the computer control system, etc.); metallurgical steel industry blast furnaces, converter gas Gasholder automatic monitoring systems, as well as petrochemical automatic monitoring systems.

工业自动控制系统包括水司的泵房变频控制系统、供水恒压控制系统、水司和水处理的计算机自动监控和信息化管理系统；电厂给煤机、给粉机、水泵和风机等的变频控制系统、电厂辅助车间程控系统（包括输煤、化水和出灰计算机程控系统等）；冶金钢铁行业的高炉、转炉煤气气柜自动监控系统以及石化的自动监控系统等。

Based on the theory of instantaneous reactive power, the multiple frequency rotate transform theory is put forward. It overcomes the defect of that the theory of instantaneous reactive power can only measure the harmonic total amount. The positive sequence and negative sequence k-multiple frequency rotate coordinate is respectively put forward in detail.

倍频旋转变换理论是基于瞬时无功功率理论提出的，它克服了瞬时无功功率理论测量方法只能测量谐波总量的缺陷，该理论分别针对正序谐波和负序谐波，提出正向和负向倍频旋转坐标，通过k—倍频旋转坐标可将k次谐波分离出来。

Fiber layer ply increases, resonance absorbs frequency to increase to unit weight of; of shift of low frequency direction, sound power absorption coefficient increases in the begining more apparent, subsequently rate of hole of; of amplitude hasten delay increases, hempen fiber sound power absorption coefficient increases gradually.

纤维层厚度增加，共振吸收频率向低频方向移动；容重增加，吸声系数开始时增加比较明显，随后增幅趋缓；孔隙率增加，大麻纤维吸声系数逐渐增大。

The present thesis aims mainly at studying power absorption of high frequency electromagnetic waves in partially ionized plasma layer in atmospheric conditions, with effects of negative ions in atmosphere, collision rate between electron and neuter gas, the external magnetic field, and nonlinear effects on power absorption of high frequency electromagnetic waves in partially ionized plasma layer under atmospheric conditions.

本文主要研究了高频电磁波在大气压等离子体层中传播和吸收的特性，着重考虑了大气中的负离子、电子与中性气体的碰撞频率、外加磁场、以及非线性现象对高频电磁波在大气压等离子体层中的传播的物理机制和吸收的影响。

This paper aims at the analysis and computation of double machine power systems frequency dynamics and provides the characteristics of double machine power systems frequency dynamics .

本文首先对双机系统频率动态过程进行了理论分析，给出了双机系统频率动态过程的特点。

The low frequency digital phase reflectoscope reflector in the industrial field is the general measuring tool which uses frequently, for instance the electrical network incorporation switches on when the electrical power system, requests two electrical network's electrical signals to be the same, between this request precise survey two power frequency signal phase difference.

低频数字式相位测试仪在工业领域中是经常用到的一般测量工具，比如在电力系统中电网并网合闸时，要求两电网的电信号相同，这就要求精确的测量两工频信号之间的相位差。

Vishnu entered a dark fourth dimensional dream that did not support his field or continued life.

毗瑟挐进入了一个第四密度的黑暗梦想，那里并不支持他的能量场或继续生命。

Leaders and decision-making persons use it to collect the data, including the information of unit work, handing in fee, oweing fee, prepaying fee,changing and afterpaying and account transfering of joining-insurance employee, and account paying of all kinds of insurances from hospitalization insurance institutions.The collected data is picked up, organized, switched and showed to user.

该子系统主要面向各级领导、决策分析人员；从各个医疗保险经办机构和定点医疗机构采集数据，包括在各个医疗保险经办机构处理的单位办公信息，单位缴费、欠费、预缴费信息，参保职工变更信息，参保职工增减变动信息，参保职工补缴信息，参保职工帐户划拨信息：包括各定点医疗机构处理的各险种帐户支出信息，各险种的统筹金支付信息等；将采集的数据提取，组织和转换，然后展示给用户。