内阻抗

From the lumped equivalent circuit model, the phase shift/attenuation and impedance characteristics of the novel structure are first analysed based on the Bloch theory, which shows the novel structure has properties analogous to those of a bandpass filter: the attenuation constant keeps zero with a continuous and smooth characteristic impedance distribution within the passband and the bandwidth may be arbitrarily specified; characteristic impedance is purely imaginary with the inhibition of the electromagetic wave propagation outside the passband.

首先从一般的等效电路模型出发，根据Bloch周期性理论对该结构的相移、衰减和阻抗特性进行了分析，结果表明该新结构具有类似带通滤波器的特性：通带内衰减常数为零，特性阻抗为实数并随频率连续平滑分布，具有可任意指定的阻抗匹配带宽；带外特性阻抗为纯虚数，电磁波传播受到抑制。

A new method relying on the Stroh formulism and the theory of the surface impedance tensor was developed to investigate the dynamic instability of interfacial slip waves.The concept of the surface impedance tensor was extended to the case where the wave speed is of a complex value,and the boundary conditions at the frictionally contacting interface were expressed by the surface impedance tensor.Then the boundary value problem was transformed to searching for zeroes of a complex polynomial in the unit circle...

基于Stroh公式和表面阻抗张量理论，提出了研究界面滑移波动态失稳问题的一种新的方法·该方法将表面阻抗张量概念推广到复波速域，并将摩擦接触界面上的边界条件以表面阻抗张量表示·最终将边值问题化归为求解一个复多项式在单位圆内的根·以弹性半空间与刚体平面相对稳态摩擦滑移为例进行了详细的分析，导出了一个4次复特征方程并讨论了方程在单位圆内解的特性，给出了滑移界面波失稳条件的显式解析表达式

To suit it for this usage, the ideal operational amplifier would have infinite input impedance, zero output impedance, infinite gain and an open-loop 3 dB point at infinite frequency rolling off at 6dB per octave.

为了得到这样的特性，理想 OP 应该有无限大的输入阻抗，0 输出内阻抗，无限大的增益，无限大的开环增益带宽(3dB 带宽)，以及其 6dB/每 2 倍频程的频率滚降。

Then, the instantaneous voltage feedback control circuit of the Z source inverter with an inner loop of the output filter inductor current is designed. The validity of the double close loop control strategy is verified by simulation and experiment results.

首先对阻抗源逆变器的逆变部分进行了建模，其次简要介绍了传统电压源型逆变器的控制策略，然后以带滤波电感电流内环的电压瞬时值反馈控制为例介绍了阻抗源逆变器的输出电压控制的实现。

According to this method the equivalent leakage reactance to matching load can be detected, the maximum output power is gained.

根据该方法确定的等值内阻抗匹配负载阻抗，可得到最大输出功率。

Aim: To determine whether activation of κ-opioid receptor with U50,4 88 H, a selective κ-opioid receptor agonist, produces any changes in electrical u ncoupling during prolonged ischemia and whether these changes in electrical unco upling is associated with the cardioprotection induced by κ-opioid receptor ac tivation, and to explore the possible mechanism.

测量指标：以分光光度计在490nm波长下测定氯化三苯基四氯唑与活细胞反应的产物formazan含量的方法测定心肌细胞活性、测定冠脉流出液中乳酸脱氢酶的含量以及心室内压；②全心停灌70min，应用四电极法观察不同浓度U50，488H、nor-BNI和5-HD对缺血期间心肌整体阻抗和电脱耦联参数(电脱耦联时间、平台时间、电脱耦联最大速率和阻抗倍数)的影响。

RESULTS: During 10 - 12 weeks, in cuntrol group: The defect area was repaired by white and soft tissue that had no resistance to press. The repaired tissue was still lower than the surrounding articular surface with clear boundary. By histological observation, it was found that the defect was repaired by the mechanism similar to inflammatory reaction and the defect is ultimately filled by the hyperplasia of hyaline degenerative fibrous tissues. In filling group: the defect was repaired by semi-transparent, smooth, textured tissues with polish that had resistance to press as well as elasticity. The repaired tissue was almost similar to the shape of the surrounding cartilage,difficult to be distinguished. After histological observation, it was found that there was no inflammatory reaction, but active hyperplasia of inner bonetissue and cartilage tissues; a lot of osteoid tissues and trabeculation were found. Newlborn cartilage was fused with surrounding cartilage tissue and connected with surrounding tissues.

结果：10～12周，对照组：缺损区由白色、质软、按压无阻抗的组织修复，修复组织仍低于周围关节面，边界仍清晰可辨，组织学以类似炎症反应的机制修复缺损，最终以透明变性的纤维组织的增生来填补缺损部位；填充组：缺损区由半透明状、质韧光滑有光泽，按压有阻抗并有弹性的组织修复，修复组织与周围软骨外形上已基本相似，不易区分，组织学未见有炎症反应的过程，内骨组织和软骨组织增生活跃，并可见大量类骨组织和骨小梁形成，新生软骨和周围软骨组织融合，并与周围组织连接。

The system comprises first and second antennas for receiving first and second RF signals of first and second frequencies, respectively; a mobile switch for measuring performance characteristics of the second antenna; and a switch circuit connected between the second antenna and the mobile switch for controlling flow of the first RF signal to the second antenna.

在移动通信终端内，一开关电路，用于根据工作模式控制CDMA天线的输入阻抗，该开关电路被连接在CDMA天线和移动开关之间，以便在GPS工作模式下维持CDMA天线的输入阻抗为高阻抗，来切断GPS信号的流入，以及在CDMA工作模式下维持CDMA天线的输入阻抗为低阻抗以接收CDMA信号。

Last, Nano Indenter XP was used to measure the mechanical properties of the fabricated probe structures, the results show that the spring constants of cantilever type and simply supported beam type probe structures were 2556 Nm-1 and 26280 Nm-1 respectively, which were close to the designed values of 2838 Nm-1 and 23935 Nm-1 with the error of 9.94% and 8.92%. DC probes and HP 4194A Impedance/Gain-phase Analyzer were adopted to measure the electrical properties of the simply supported beam probe card. The contact resistance from the probe tip to the end of stripline was 0.6Ω. In the frequency range of 5 to 40 MHz, the characterized impedance between two probes was larger than 20 kΩ, and the capacitance was from 0.17 pF to 0.27 pF.

采用Nano Indenter XP纳米压痕仪对制备后的探卡结构进行力学性能测试，测得悬臂梁和简支梁的弹簧常数分别为2556 Nm-1和26280 Nm-1，与2838Nm-1和23935 Nm-1的理论设计值相差9.94%和8.92%；采用直流探针和HP 4194A阻抗分析仪对简支梁型探卡结构进行了电学性能测试，从简支梁探针到引线末端的直流接触电阻为0.6Ω，在5-40 MHz范围内，探针间特征阻抗大于20 kΩ，电容在0.17 pF至0.27 pF之间，测试结果表明探针的接触电阻小、射频隔离性能好。2。

The new approach based on bio-impedance technology is influenced by many factors such as gastric secretion, components of test meal. But the non-nutrient fluid that has low electric conductivity and has no impact on stomach can be employed to investigate the relationship between the emptying curve of impedance and gastric volume.

胃阻抗法虽然受到胃液分泌、试验餐成分等多种因素的影响，但是选用对胃内影响较小、电导率低的非营养性液体可以获得阻抗信号和胃容积变化的对应关系。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷