A design of a gradient waveform generator with self-triggering function for magnetic resonance imaging(MRI) is proposed.
提出一种具有自触发功能的高精度梯度波形发生器,其主要特点在于其采用了高精度(24位)DAC,并具有自触发功能,使梯度波形发生器能独立于脉冲序列发生器工作,从而解决了高精度DAC群延时的问题。
The spectrometer is one of the key components in the MRI system, and the gradient waveform generator is one of the important units in the spectrometer.
谱仪是磁共振成像设备的核心部件之一,梯度波形发生器是谱仪硬件的一个重要单元。
This thesis gives a detailed discussion about the gradient waveform generator (GWG) design with the analog pre-emphasis in the digital spectrometer system.
本文就谱仪系统中的具有模拟预加重功能的梯度波形发生器的设计以及板卡在核磁实验总结和展望进行了介绍。
Traveling-wave starting algorithm based on morphological gradient and wavelet transform modulus sum
基于形态梯度与小波变换模之和的行波启动元件
On the basis of basic morphological transforms and their combined modes,transient current signals can be extracted by use of morphological gradient with adaptive weighting.
在分析数学形态学基本形态变换及其组合形式的基础上,利用自适应方法实现形态梯度自适应加权组合,在提取高频暂态电流信号的同时,可有效抑制随机噪声的影响。
This paper presents a novel algorithm of identifying the inrush current and short circuit current caused by internal fault on the basis of transient detection using morphological gradient, meanwhile transient current signals are extracted by use of morphological opening and closing algorithm.
提出了一种识别变压器励磁涌流和短路电流的新方法,该方法在利用数学形态梯度进行边沿检测的同时,采用形态开闭运算有效地提取出高频暂态电流信号。
Then edge detection based on morphological grads provides better license plate s edge and is propitious to locate exactly.
接着,运用形态梯度方法对粗定位后的图像进行边缘检测,从而更好地保持车牌的边缘。
The effect of the ecological gradient on the economic productiona of Zea mays L.
本文定位、定量研究了生态梯度对玉米（ＺｅａｍａｙｓＬ。
Two ecological gradient axes (EGA) were suggested: EGA(CA) and EGA(r2).
应用典型相关的原理和技术,将多元地理坐标和生态因子降维成1元,研究提出2个生态梯度轴(EGA);EGA(CA_1)和EGA(r~2)。
By the methods of TWINSPAN and DCCA,this paper studied the ecological gradients of the plant communities in South Lüliang Mountains,in terms of the interactions between plant species and communities and environmental factors.
采用TWINSPAN分类和DCCA排序法,从植物种、植物群落与环境因子之间的相互关系,对吕梁山南段植物群落的生态梯度进行了研究。
A Gradient Waveform Generator with Self-Trigger Function Used in MRI;
一种具有自触发功能的梯度波形发生器
The Gradient Waveform Generator for Magnetic Resonance Imaging;
用于磁共振成像系统的梯度波形发生器
Texture Classification Method Combining Gray Shade-Gradient Intergrowth with Ring Form Gabor Filtering
灰度—梯度共生/环形Gabor滤波纹理分类
square-wave oscillator
方形波振荡器;矩形波发生器;矩形波发生器
Numerical Simulation on Waveform Flatness of Simple Structure Plane Wave Generator
简易平面波发生器波形平面度数值模拟
Choice of Filter on Big Gradient and Complex 3-D Shape Measurement
大梯度复杂物体三维形面测量中滤波器的选择
photoelectric wave-form generator
光电式定波形发生器
special waveform signal generator
特殊波形信号发生器
Ultra-low Frequency Rectangle Wave Signal Generator with High Stability Based on TCXO
基于温补晶振的高稳定度超低频矩形波发生器
linear staircase function generator
线性阶梯式函数发生器
To arrange or take place in an echelon.
排成梯队排列成梯队或以梯队形式发生
Study on Bulk Acoustic Wave Ladder Filter Using AlN Thin Film
AlN薄膜体声波梯形滤波器的制备与性能分析
Research on Waveform Modulation Technique for Staircase Inverters
阶梯波合成逆变器的波形调制技术研究
Functional Waveform Generator Based on DDS;
基于DDS技术的函数波形发生器设计
Research on Virtual Arbitary Waveform Genetator Based on Vxibus;
基于VXI总线的任意波形发生器的研究
Study of Arbitrary Waveform Generator Based on DSP;
基于DSP的任意波形发生器的研究
DDS Technology Based Programmable Arbitrary Waveform Generator;
基于DDS技术的可编程任意波形发生器
FPGA Application Research in a Virtual Arbitrary Waveform Generator;
虚拟任意波形发生器中的FPGA应用研究