Responses to 1 2 pulses for NQR spin system of I=1 with small energy level separation are examined with fictitious spin 1/2 operator formalism.
用虚拟自旋—１／２算符理论考察了Ｉ＝１的核四极共振自旋系统在其能级间隔较小时对１—２个脉冲的响应。
The spin－lattice relaxation for a ~14N NQR spin system is a dual exponential relax-ation.
￣１４Ｎ核四极共振自旋系统的自旋－晶格弛豫是一种双指数弛豫。
The development in the research of explosives detection, including the detection method of nuclear quadrupole resonance, types of signal excitation, multipulses technologies, the elimination of false and interferential sign and the relation between explosive and nuclear quadrupole resonance signal at domestic and abroad is reviewed with 23 references.
综述了探测炸药在国内外研究的进展,包括核四极共振的探测方法、激励信号的方式和多脉冲序列技术、SQUIDs先进探测技术的应用、虚假信号及干扰信号的消除和炸药与核四极共振信号的关系,提出了核四极共振探测炸药中存在的问题及解决该问题的建议。
It doesn\'t create new ringing and doesn\'t operate during the reception of nuclear quadrupole resonance signal and there\'s no loss in sensitivity.
介绍了一种用于主动减小核四极共振(NQR)探头恢复时间的Q值变换电路,它利用MOSFET控制变Q电路与探头电路的耦合,并通过变压器增加与电感线圈串联的阻抗值以达到改变Q值的目的。
A method of removing Radio Frequency Interference in Nuclear Quadrupole Resonance detecting system is introduced.
本文针对核四极矩共振探测系统中面临的NQR信号检测频率附近出现的射频干扰问题。
The acquirements for designing a digital nuclear quadrupole resonance spectrometer were analyzed.
介绍了软件无线电技术的基本原理 ,分析了全数字化核四极矩共振谱仪的设计要求 ,讨论了设计时在软件、硬件方面的一些考虑 ,给出了基于软件无线电技术的全数字化核四极矩共振谱仪设计一个实
In previous studies we have developed a nuclear quadrupole resonance (NQR) for detection of explosives.
介绍了核四极矩共振(Nuclear Quadrupole Resonance简称NQR)炸药检测系统的基本原理及检测过程中面临的如何消除激励脉冲信号拖尾对NQR检测信号的影响问题。
An Information Database on Detecting Hidden Explosives with NQR-Based Methods
核四极共振隐藏炸药探测信息库设计
An Efficient Fast Recovery Scheme for Nuclear Quadrupole Resonance Single Coil Probe
一种快速有效的核四极共振探头恢复方法
Method for Explosive Detection Using Nuclear Quadrupole Resonance/Electromagnetic Induction (NQR/EMI)
一种探测炸药的核四极矩共振/电磁感应方法
The most radical of the new approaches uses “quadrupole resonance technology”.
最引人注目的新方法是使用“四极矩共振技术”（注四）。
isovector quadrupole oscillation
同位旋矢量四极振荡
calar quadrupole oscillatio
同位旋标量四极振荡
gas-tetrode relaxation oscillator
充气四极管张弛振荡器
Restore North-east region:reproduce Chinese economy s fourth increasing top;
振兴东北:再造中国经济第四增长极
Nonlinear vibration of functionally graded material plate under different internal resonances
四边简支FGM矩形板非线性振动中的内共振
Study of Laser-Polarized ～(129)Xe via Nuclear Magnetic Resonance;
激光极化～（129）Xe的核磁共振研究
Research of Resonant Tunneling Diode on GaAs Substrate;
GaAs衬底共振隧穿二极管的研究
High performance resonant cavity light emitting diodes for POF application
用于POF的高性能共振腔发光二极管
Magnetic resonance imaging of small hepatocelluar carcinoma in quarter echo sequence
小肝癌的磁共振四回波序列成像特点
Existence of Solution for a class of nonresonant Fourth-order Elliptic equation
一类非共振四阶椭圆方程解的存在性
Electric Charge Accumulation Effect in RTD:Lecture of Resonant Tunneling Devices(4)
共振隧穿二极管中的电荷积累效应——共振隧穿器件讲座(4)
Design on the Material Structure of RTD:Lecture of RTD(5)
共振隧穿二极管的材料结构设计——共振隧穿器件讲座(5)
Study on Planar Resonant Tunneling Diode and Resonant Tunneling Transistor and Their Applications;
平面型共振隧穿二极管与共振隧穿晶体管的研究与应用
Theoretical electric quadrupole transition probabilities and oscillator strengths for Sr;
理论Sr原子电四极矩跃迁几率和振子强度