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- By using microprocessor technology, this system realized direct digit control (DDC) of the constant strain test, the constant revolution test, and digital measurement of testing parameters. 该系统运用微处理机技术实现了恒应变试验、恒转速试验的直接数字控制(DDC)和试验数据的数字测量。 文章阐述了系统的控制方式和功能模块化的硬、软件结构及设计要点,并对系统的功能、特点作出结论。
- direct digital measurement 直接数字化测量
- Widely used Direct Digital Controllers(DDC) and integrated Building Management Systems(BMS) improve the measurement and monitoring of air conditioning systems. 应用日见广泛的直接数字控制器及集成楼宇控制系统(BMS)大大地提高了空调系统的检测及监控,这也为空调系统在系统层次上的优化控制奠定了基础。
- This paper introduces a DDC(Direct Digital Control) temperature system. 介绍一种 DDC(直接数字控制 )温度系统。
- Objective: To evaluate the value of direct digital panoramic sialography. 摘要目的：评价直接数字曲面体层摄影在涎腺造影中的临床价值。
- Objective:To evaluate the value of direct digital panoramic sialogra phy. 目的评价直接数字曲面体层摄影在涎腺造影中的临床价值。
- A virtual instrument based integrated measurement system for Doppler navigation radar is developed. Using direct digital synthesis(DDS)technique,a kind of radar Doppler frequency simulator is introduced. 分析了机载四波束多普勒测速雷达的工作原理,采用直接数字频率合成(DDS)技术进行多普勒频移模拟器的设计,通过数字控制,该模拟器可以产生高分辨率的多普勒频率信号；
- Widely used Direct Digital Controllers(DDC) and integrated Building Management Systems(BMS) improve the measurement and monitoring of air conditioning systems. They also provide sufficient information for supervisory optimal control at the system level. 应用日见广泛的直接数字控制器及集成楼宇控制系统(BMS)大大地提高了空调系统的检测及监控,这也为空调系统在系统层次上的优化控制奠定了基础。
- Synchronous sampling by software is commonly used in digital measurement of periodic electric signals. 软件同步采样是周期电气信号测量中最常用的采样方式。
- K. Srinivasan, “Digital Measurement of Voltage Flicker,” IEEE Transactions on Power Delivery, Vol. 6, No. 4, October 1991, pp. 1593-1598. 江荣成，电力品质实务(一)，全华科技图书股份有限公司，民国89年5月。
- A new method LFM in direct digital frequency synthesizing ( DDS) based on CORDIC algorithm is introduced in this paper. 本文介绍了一种应用CORDIC算法的线性调频直接数字合成(DDS)的实现方法。
- Objective To research the application value of direct digital radiograph (DDR) in nasal bone imaging. 目的探讨直接数字化X线摄影(direct digitized radiography,DDR)在鼻骨摄影中的应用价值。
- Digital measurement of thickness was conducted by optical interferometry, assisted with a CCD camera to record fringes and a software package to analyze the fringes. 提出使用数字CCD拍摄光干涉条纹,使用图像处理软件进行灰度值扫描分析光干涉条纹的方法,对不透明薄膜进行光干涉法测厚。
- This paper discusses the direct digital control (DDC) in the air-handing unit of air-conditioning system. 本文将讨论空调系统中空气处理机组的直接数字控制(DDC)设计。
- Abstract: The development of instrument is analyzed,the architecture of virtual instrument in the network days is discussed,and then the digital measurement is analyzed in detail. 文摘:分析了仪器发展的几个阶段，探讨了网络化时代的虚拟仪器体系结构，并对数字化测量作了详细的介绍。
- Direct Digital Frequency Synthesis(DDS) technique is introduced and its spurious error is mainly studied. 介绍了直接数字频率合成技术以及分析其杂散误差,对相位截断误差和幅度量化误差进行了傅立叶级数分析研究。
- A Quadrature Direct Digital Frequency Synthesizer (QDDS) based on CORDIC algorithm is presented. 设计了一种基于CORDIC算法的正交输出直接数学频率合成器(QDDS);并在ALTERA FLEX10K 系列FPGA上予以实现.
- A new DDC (Direct Digital Control) system won't improve the operation of malfunctioning or inoperable devices! 一套新的DDC系统不可能改善系统的运行故障或损坏的设备。
- MMW high resolution radar range profile two-step stretch processing method direct digital synthesis （DDS）. 标 签 毫米波高分辨雷达 距离像 双脉冲伸缩处理 直接数字合成(DDS).
- Direct digital controller(DDC) is the basic control unit of building automation system(BAS). 直接数字控制器(DDC)是楼宇自动化系统(BAS)的基本控制单元。
