全幅值

Fluxgate sensors have the second harmonic voltage amplitude with the magnetic field strength is proportional to the adoption of second harmonic filter through phase-sensitive detector rectifier, to achieve full-wave rectifier, low-pass filter in through the phase-sensitive detector after the second harmonic into a smooth DC signal, on the one hand to the back of the circuit, on the one hand, the magnetic flux through the door to feedback regulation, the opposite magnetic field generated with the measured magnetic field, so that the work has always been zero fluxgate magnetic field, thus ensuring the most high-precision fluxgate.

磁通门传感器产生的二次谐波电压幅值与磁场强度成正比，二次谐波通过通过滤波器再通过相敏检波器整流，实现全波整流，在通过低通滤波器将相敏检波后的二次谐波转化成平滑的直流信号，一方面送到后面的电路进行，一方面通过反馈调节送到磁通门中，产生与被测磁场相反的磁场，使磁通门始终工作零磁场下，从而保证磁通门的最高精度。关键词：磁通门磁力仪，相敏检波器，磁场

The results show, when polar distance is bigger than the size of cross section of tunnel, the difference of anomalous feature between the corner-sections and wall-sections in tunnel is very small. The apparent resistivity is only related to the distance between section and bodies. The shielding effect of the tunnel is not so evident that the character and value of anomalous are similar with those in full space.

计算结果表明，当坑道内偶极测深的极距大于坑道截面尺寸时，坑道角与坑道面断面异常形态差异不大；视电阻率值只与断面和地质体间的距离有关；坑道空腔的屏蔽效应并不明显，坑道内各个测深断面的异常幅值和形态与全空间中观测结果非常相似。

Firstly, the basic character of the remote filed eddy current is simulated and analyzed in case of two-dimension axial symmetry which approves the existence of remote filed eddy current phenomenon; the full circumferential defect model is investigated to approve the feasibility of using the RFEC techniques to detect the position and depth of defect; the pit corrosion、circumferential and axial crack models are simulated, and the defect character based on voltage plane polar plot and the changes of phase and amplitude are analyzed to supply the standard for defect reconfiguration.

首先，在二维轴对称情况下仿真与分析了远场涡流的基本特性，证实了远场涡流现象的存在；对全周向缺陷的远场涡流检测进行了详细研究，证实了远场涡流检测缺陷位置和深度的可行性；对点状腐蚀、轴向与周向裂纹三种非轴对称缺陷进行三维有限元仿真，利用相位差和幅值变化曲线与电压平面极坐标图对缺陷特征进行分析，为缺陷形状重构提供了依据。

The equation of ESCDAC is presented. Secondly, Based on this equation and the independent characteristic of observation valves, the ESR of the azimuth measurement error is presented by full - difference of the measurement equation which acts as the precision of ESCDAC.

然后以该方程为基础，根据该方程中各个观测量相互独立的特点，方位测量误差的均方根值可由测向方程的全微分求得，并将其作为电扫描恒差比幅测向的精度，由该精度公式可以看出，电扫描恒差比幅测向有很高的精度，并且在不同的角度上，其精度保持稳定。

the whole cell patch clamp recording technique was used in this study.

采用全细胞膜片钳记录法，在新鲜分离的大鼠背根神经节细胞上观察血竭对钠通道电流幅值的影响。

The channel currents appear quantal in nature, transiting in a seemingly random manner between the"open"and the "closed", and have the characteristic of"all"or"none".

单通道电流信号具有&定量&特性，表现出&全有&和&全无&的特征，为一个个电流幅值高度恒定，持续时间宽度随机变化的矩形波，类似于随机电报信号。

This paper, aiming at the topology structure of voltage-source shunt APF with filter-injecting circuit, advances a rigid output inductance calculation method based on harmonic current analysis which can work out the optimum output inductance values according to different compensation objectives.

本文尚有如下值得磋商之处：1、在许多APF应用场合，谐波负荷并不是稳定的三相全桥整流感性负载，各次谐波的幅值和相位都是变化的，其最大电流变化率难以确定，此时如何设计其输出电抗器？

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。