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To satisfy the demand of real-time control in brushless direct current motor, this paper proposes a design of a digital control system which consists of digital signal processor and monitor and control generated system.

为满足高性能实时测控系统的要求,设计由数字信号处理器和通用监控系统MCGS组成的应用于无刷直流电机的数字控制系统。

The step motor can receive digital signal directly and has the ability to response outer environment immediately and has no accumulation error, which often is used in driving system. In this driving system, open-loop control system is composed of stepping motor, which can satisfy the demand not only for control precision but also for the target of economic and practicality. On this basis , the analysis of stepping motor in power calculating and style selecting is also given.

由于步进电机能够直接接收数字量,响应速度快而且工作可靠并无累积误差,常用作数字控制系统驱动机构的动力元件,因此,在驱动装置中采用由步进电机构成的开环控制方式,这种方式既能满足控制精度的要求,又能达到经济性、实用化目的,在此基础上,对步进电机的功率计一算及选型问题经行了分析。

Simulated data had be used to check these methods. Calculation results were quite satisfactory, in which exponential sampling, CONTIN and NNLS was suitable for unimodal and bimodal distribution. Based on the theoretical study, a PCS ultrafine particle size measurement apparatus was set up.

在以上理论分析的基础上,应用PCS理论研制了一台超细颗粒粒径测量装置,该装置在国内无关键专用设备----数字相关仪的情况下,采用软件辅以外围硬件设备替代数字相关仪,实践证明是有效的。

Digital clock is a kind of modern calculagraph which is composed of digital integrated circuit and can show decimal digital. Compared with mechanical clock, it is exact and can be see frankly. It is very popular in some public places, such as station, airport.

数字钟是用数字集成电路构成的、用数码显示的一种现代计时器,与机械表比,它走时准、显示直观、无机械传动装置等特点,广泛应用于车站、码头、机场等公共场所。

Digital clock is a kind of modern calculagraph which is composed of digital integrated circuit and can show decimal digital. Compared with mechanical clock, it is exact and can be see frankly. It is very popular in some public places, such as station, airport.Keywords: Multisim2001; Circuit Simulation; Digital Circuit; Answer Bell

数字钟是用数字集成电路构成的、用数码显示的一种现代计时器,与机械表比,它走时准、显示直观、无机械传动装置等特点,广泛应用于车站、码头、机场等公共场所。

C. electric parameters measurement. The means and conditions to reestablish the signal without distortion are also given. At last, this paper discusses the theoretical basis for power, RMS and harmonics phase measurements of power system directly from the Harr wavelet matrix transform data associated with each sampling voltage and current element pair.

本文针对电力系统特点,分析了非均匀采样的数字频谱结构及非均匀采样周期信号的数字谱表达式,并讨论了非均匀采样对交流电量参数测量的影响,给出了非均匀采样无失真恢复信号的方法和条件。

The lensless Fourier transform holograms thus formed were digitally recorded and the experimental results show that the reconstructed images and the interferogram can be evaluated for object deformation.

在光纤数字全息光路中引入自聚焦透镜,利用其特有的成像特性,作为物光波的中继传输器件,构成一套紧凑型光纤数字无透镜傅里叶变换全息记录系统,以实现对微小物体的全息记录与数值再现。

It shows that the lensless Fourier transform digital hologram can be reconstructed at any distance by Fresnel transform algorithm. For convolution algorithm,the whole reconstructed image with high resolution can be acquired in an optimal reconstruction range or a small area around it.

结果表明:利用菲涅耳变换算法对离轴无透镜傅里叶变换数字全息进行重建时,无重建距离的限制;采用卷积重建法只能在最佳再现距离附近一个非常小的范围内才能获得高分辨率再现像;而采用角谱重建法在略小于最佳再现距离及大于最佳再现距离较大范围内重建,均能获得高分辨率的再现像。

Experimental results show that the system has good dynam ic and static characteristics.

数字无刷直流电机驱动控制系统,用于实现小型无。人飞机的舵机控制,。。。

The company has independently developed, development, production of the products have six series, more than 400 varieties, including: wire and cable series: high-temperature compensation wire, control cables, fire-retardant cables, anti-corrosion cable, power cable, 6 ~ 110KV crosslinked power cables, computer cables, silicon rubber cables, high temperature cables, fire-resistant cables, low smoke low halogen, low smoke zero halogen cables, such as the main cable tray; Temperature Instrument Series: ITS900 in line with the International Temperature Scale and IEC standards A, B-grade Thermocouple , Explosion-proof Temperature Transmitter integration, intelligent all-input temperature transmitter; Pressure / Differential Pressure Meter Series: general pressure gauges, precision pressure gauges, pressure / differential pressure switch, the general stress / Differential Pressure Transmitter, 1151 , 3051 smart capacitive pressure / differential pressure transmitter; Level Instrument Series: glass / glass level gauge, quartz glass tube liquid level, the electric-contact level gauge, magnetic liquid level transmitter, magnetic liquid level switch, input-type hydrostatic liquid level transmitter, liquid level transmitter float electricity, etc.; Flow Meters Series: All English Intelligent Vortex Flowmeter, Turbine Flowmeter; Display Instrument Series: Intelligent Control LED digital display device, Intelligent LCD screen controlled device, Guangzhu instructions figures, such as conditioning Alarm.

公司自主研制、开发、生产的产品主要有六大系列、400多个品种,其中有:电线电缆系列:高温补偿导线、控制电缆、阻燃电缆、防腐电缆、电力电缆、6~110KV交联电力电缆、计算机电缆、硅橡胶电缆、高温电缆、耐火电缆、低烟低卤、低烟无卤电缆主电缆桥架等;温度仪表系列:符合ITS900国际温标和IEC标准的A、B级热电偶,防爆型一体化温度变送器、智能全输入温度变送器;压力/差压仪表系列:一般压力表、精密压力表、压力/差压开关、普通压力/差压变送器,1151、3051智能电容式压力/差压变送器;液位仪表系列:玻璃管/玻璃板液位计、石英玻璃管液位计、电接点液位计、磁性液位变送器、磁性液位开关、投入式静压液位变送器、电浮筒液位变送器等;流量仪表系列:全中文智能涡街流量计、涡轮流量计;显示仪表系列:智能LED数字显示调节控制仪、智能LCD界面显示调节控制仪、光柱指示数字显示调节报警仪等。

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In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国,慢性酒精中毒,肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题,你可以随时联系我。

Very pretty, but the airport looks more fascinating The other party wisecracked.

很漂亮,不过停机坪更迷人。那人俏皮地答道。