1.Objective To develop a new Two-step magnetic resonance electrical impedance tomography(MREIT)algorithm based on radial basic function(RBF)neural network for imaging electrical impedance distribution of a head.
目的基于径向基函数(radial basic function,RBF)神经网络的两步核磁共振电阻抗成像(mag-netic resonance electrical impedance tomography,MREIT)算法,对人体头部进行MREIT。
2.These assumptions are quite restrictive and their validity is difficult to ascertain. Subsequently, Ma and Igor (2005) put forward the concept of Zoeppritz Elastic Impedance which is based on Zoeppritz equation and so is exact and accurate.
随后Ma和Igor(2005)利用准确的佐普里兹公式提出了佐普里兹弹性阻抗(Zoeppritz Elastic Impedance)的概念,这种阻抗不加任何近似,非常准确。
3.Left ventricular function was determined in 28 normal subjects (group A), 33 patients with myocarditis (group B) and 50 patients with coronary artery disease (group C) by simultaneously recording of clcctrocardiogram(ECG), phonocardiogram (PCG), first derivative of electrical impedance cardiogram(TPG), carotid pulse trace (CPT), and apcxcardiogram (ACG).
本文采用同步描记心电图(ECG)、心音图(PCG)。 心阻抗一阶导数图(first derivativeof impedance cardiogram,FDICG)、颈动脉搏动图(CPT)和心尖搏动图(ACG)的方法,以正常人为对照,研究心肌炎和冠心病患者左室功能的改变。
4.The bacterial culture medium impedance was determined by an impedance measurement device with a microbial impedance sensor, and the corresponding impedance curve was drawn according to the impedance values measured throughout the period of bacteria culture.
摘要用自制的微生物电阻抗传感器和电阻抗测量装置，测量接种细菌的培养基电阻抗值，并将细菌在培养期间内取得的所有电阻抗值描记成阻抗曲线图谱。
5.By calculating the apparent impedance,the author analyses the operating behaviour of phase- and earth-fault distance relay and shows that their performences vary with the amplitude of the double-feed emf and the inequality between the source impedance angle and that of the line impedance.
在此基础上,本文主要针对两侧电源电势幅值变化以及电源阻抗角和线路阻抗角不等时,计算分析了阻抗继电器测量阻抗和动作行为。
6.Although impedance method and three kinds of flow cytometric methods for platelet counts show a correlation (r>0.98, P
与TruCOUNT法血小板计数相比 ,ADVIA12 0法计数值偏高 ,RBC/PLT R法偏低。 TruCOUNT法与ADVIA 12 0法的相关性最好 (P 0 98。
7.Impedance of aluminium beam is tested with PZT and studied impedance frequency specialty, and the real impedance, the stain mode and position of PZT are analyzed.
实验将铝梁作为测试对象，在其上粘贴压电陶瓷，通过对阻抗应答、振动模型和压电陶瓷片的粘贴位置的分析，研究梁的阻抗频率特性。
8.The ETU influence on characteristic impedance in GTEM Cell two-dimensional cross section is calculated by using FEM. The influences on the characteristic impedance in GTEM cell induced by grounding and un-grounding metal EUT are compared.
利用有限元方法计算了GTEM室内二维截面上EUT对特性阻抗的影响,比较了金属EUT接地和不接地2种情况下对GTEM室特性阻抗的影响;
9.At frequency of 1000Hz, when the relative humidity changes from 10% to 80%, the impedance of the elements decreases slightly, otherwise, when the relative humidity changes from 80% to 100% (thus, the dew will form), the impedance of the elements show variations higher that two orders of magnitude.
工作频率为1000Hz时，当相对湿度由10％变至80％时，元件阻抗只略有减小，而当相对湿度由80％变至100％（产生结露时）时，元件阻抗变化大于两个数量级。
10.It also has a low impedance, which assures that the typical unbalanced output impedance is between 100 and 1000 ohms.
同时它的低阻抗可以确保典型的非平衡输出阻抗保持在100到1,000欧姆之间。
