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- digital pulse sequence 数字脉冲序列
- In the second part, the basic theory of MRI, some basic concepts and the developing method of the pulse sequence are introduced. 第二部分介绍了核磁共振成像的基本原理、序列的有关概念及目前Resonance公司提供的序列开发平台编写序列的方法;
- The frequency domain profiles of DANTE pulse sequence are calculated according to the analytical solutions of Bloch equations. 根据 Bloch方程的解析解对 DANTE脉冲序列进行计算机模拟 .
- After equilibrium and regeneration, the current pulse signal reverts to standard digital pulse signal. 经过均衡和再生后,转变成标准的数字脉冲信号。
- Signal in MR images is high or low (bright or dark), depending on the pulse sequence used, and the type of tissue in the image region of interest. 磁共振中的信号根据所用脉冲的顺序以及所要成像组织的类型分为高信号或第信号(亮或者暗)。
- The new kid on the radio block is ultrawideband, also known as UWB or digital pulse wireless. 这个无线电领域中的新东西就是超宽带,也称UWB或数字脉冲无线。
- Signal in MR images is high or low (bright or dark), depending on the pulse sequence used, and the type of tissue in the image. 磁共振中的信号根据所用脉冲的顺序以及所要成像组织的类型分为高信号或低信号(亮或者暗)。
- The second type of information GPS satellites emit is a set of ranging codes, a unique patterned sequence of digital pulses. GPS卫星传送的第二种讯息是一组测距码,也就是具有独特模式的一连串数位脉冲。
- Digital pulse processor supplies quicker data process speed, more spectrum process techniques with the stable open-model software. 数字脉冲处理器提供更快的数据处理性能,连同稳定的软件提供更多的图谱处理技术以及分析技术。
- Methods 59 patients with upper urinary tract obstruction were subjected to MRU performed in a heavily T2 weighted fast echo pulse sequence in the coronal plane. 方法59例上尿路梗阻性疾病患者接受检查,MRU为冠状位快速自旋回波T2加权像。
- When two counters of the Intel8253 work at mode 1 and mode 2 respectively,the pulse sequence can be programmed with the change of the pulse width and pulse period. 该方法利用8253芯片的两个计时计、数通道分别工作在方式1和方式2,通过软件编程改变脉宽和脉间的时间值产生脉宽、脉间可变的脉冲序列。
- Digital pulse demagnetizer has better demagnetizing effect and can increase the efficiency of classification and screening. 数字脉冲脱磁器是一种新型脱磁器,其脱磁效果好,明显提高分级效率及筛分效率。
- Stepping motors anr DA converting elements that can turn digital pulse signals into mechanical angular displacement or linear displacement. 步进电动机是一种将数字脉冲信号转换成机械角位移或者线位移的数模转换元件。
- This paper introduces the working principle and main function parts of the digital control machine tool servosystem using digital pulse comparator. 介绍了一种采用数字脉冲比较器的数控机床伺服系统的工作原理及主要功能部件。
- In order to improve the distance resolution, some imported airborne fire-control radar uses the digital pulse compression technique based on 13 bits Barker-code. 摘要某型引进机载火控雷达为提高地图测绘的距离分辨力,采用了13位巴克码数字脉冲压缩技术。
- A interception probability reduction theory by means of comparing the RPPM with constant PRI pulse sequence is also analysised in this paper, further more the strong properties of ECCM of the RPPM is discussed and analysised. 此外,本文还介绍了随机脉位调制信号比较于等重复周期(PRI)脉冲信号来降低信号被截获概率的原理,讨论并分析了随机脉位调制脉冲多普勒雷达较强的抗干扰能力。
- It not only can implement the digital pulse compression and coherent integration for radar sum and difference signals, but also control the whole radar system. 能实现雷达和、差信号的数字脉冲压缩与动目标检测,并控制着整个雷达系统的运行。
- A interception probability reduction theory by means of substituting randomly staggered pulse sequence for constant PRI pulse sequence is analysised to improve the existence capability of radar in ECM. 为了提高雷达在电子对抗中的生存能力,分析了随机脉位调制信号取代等重复周期(PRI)脉冲信号来降低信号被截获概率的原理。
- The first part introduce the basic principle of Magnetic Resonance Imaging and the structure of MRI spectrometer, which includes pulse sequence generator and compiler, RF unit,receiver unit and pulse field gradient unit. 第一部分简单介绍了核磁共振成像的基本原理,以及MRI仪器的各个组成部分。 其中包括脉冲序列发生器、射频发射单元、接收机单元和梯度发生单元。
- The imaging protocol for the mica samples consisted of a spin-echo pulse sequence with multiecho acquisition to collect images at seeral parallel echo times, the authors explained. 该研究报告的作者解释,云母标本成像协议包括自旋回声脉冲串和在几个平行回声时间段收集的多回声影像。
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