A high frequency non contact measurement method is presented, in which hall elements are employed to pick up the dynamic displacement and novel circuit is used as nonlinear compensation one. 介绍了一种适用于诸如飞行器鸟撞实验的软体冲击动位移检测系统,提出了用霍尔磁敏器件为位移传感元件,新型线性补偿电路为中间处理环节的高频动位移非接触式测量方法。
Some problems existing in the currently used minimal entropy high frequency extrapolation method are pointed out. On the basis of this, a new method of frequency compensation constrained with synthetic record+ limited entropy is put forward firstly. 指出了现行的最小熵高频外推方法存在的一些问题,在此基础上首次提出理论记录+熵约束的频谱补偿方法,并给予了具体实现。
The main technology is using DMO stack to replace conventional CMP stack, using partial migration before stack with migration after stack to replace migration before stack, using accurate statics and two step deconvolution, and using high frequency compensation after stack. 其技术关键是DMO叠加代替常规共中心点叠加、叠前部分偏移加上叠后偏移代替叠前偏移、精细静校正与两步法子波反褶积、叠后高频补偿。
Decreased evidently 〔 P < 0.001 〕 and within banana graph, especially high frequency compensation was improved apparently. 助听阈值明显减小(P<0.001)更集中于香蕉图内,尤其是高频补偿改善显著。
Current status of compensation system of occupational injury was studied. One of major causations for high frequency of occupational injury was that the rate of compensation was too low resulting in low cost of accidents. 研究了我国工伤事故赔偿的现状,目前我国事故多发的一个重要原因就是工伤事故赔偿标准偏低,导致事故成本低;
In underwater acoustic communication, because of the high residual frequency error, traditional Doppler compensation is not efficient for symbol synchronization when there is acceleration between transmitter and receiver, which result in low receiving performance. 在水声通信中,当收发双方存在一定加速度时,传统的多普勒频移补偿误差较大,影响码元同步并降低接收性能。
According to that the wavelet transform has good partial character in time and frequency domain, we make high frequency compensation to the frequency band data after wavelet decomposition in this paper. After wavelet reconstruction, the seismic data resolution is improved effectively. 根据小波变换在时域或频域均具有良好的局部化性质,对小波分解后的频带记录进行了高频补偿,经小波重构后可以发现,地震记录的分辨率得到了有效的提高。
The low frequency compensation helps determine the basic velocity structure as well as absolute velocity value, whereas the high frequency compensation could compress waveform and suppress noise so that the resolution and S/ N of seismic data can be improved. 有利于求取基本的速度结构和绝对速度值:高频补偿,能有效地压缩波形.压制噪声,从而提高地震资料的分辨率和信噪比。
In order to restrain EMI produced by high frequency diode at output stage of power supply, a common mode transformer method and a compensation winding method are proposed and their effects are validated of experiments. 根据模型,提出了串联共模变压器和并联补偿绕组的方法,以改善电源输出端共模干扰的抑制效果,并进行了验证。
High/ low frequency compensation of seismic signal 地震信号的高低频成分补偿
Because the measuring vibration device based on tunneling effect has high sensitivity, good frequency characteristic and the same vibration response characteristic consistent with STM, it can supply the vibration compensation for STM and improve STM measuring precision. 实验表明基于隧道效应的振动检测系统具有很高的灵敏度,良好的频率特性和与STM一致的振动响应特性,可以为STM提供振动补偿,提高此类仪器的测量精度。
A high speed ECL programmable frequency divider is described in the paper. including the design of logic, circuit and layout as well as the temperature compensation considerations. 本文介绍了一种ECL高速可编程分频器的逻辑设计、电路设计、温度补偿设计、版图设计及研制结果。
In this paper, a developed high precision constant current source is proposed and analysed including the circuit composition and working principle description, the frequency and temperature characteristics analysis, the stability compensation method selection and the compensation parameters optimization. 介绍一种负载悬浮的高精度恒流源,详细阐述其电路组成与工作原理,分析研究电路的温度特性、频率特性和稳定性补偿问题,寻求最佳补偿参数。
High frequency dual-boost digital PFC converter based on steady second-harmonic compensation and anti-windup control 基于SSC和AW控制的高频双Boost数字PFC电源
A equivalent model of high frequency transfer function was proposed, in order to realized the digital compensation of measurement equipment's error. 论文提出了一种连乘式的高频传递函数模型,便于实现测量仪器测试误差的数字化校正;
The non-ideal effects in high frequency compensation frequency characteristic of OTA-C filters are analyzed. A simple high off frequency method is discussed. 分析了OTA的非理想因素对滤波器高频性能的影响,并给出了简单的高频补偿方案。
High frequency compensation in high resolution seismic data acquisition 高分辨率地震数据采集中的高频补偿
Thirdly, it adapts the Kalman Filter to remain the active movement and separate accurate high frequency movement for image compensation. 再次,采用卡尔曼滤波更精确的保留主动运动,分离出准确的高频运动用于图像补偿,更符合人眼观察的习惯。
Static reactive power generator with a special circuit structure, high frequency power electronic switching device, advanced control algorithm with real-time, the precise reactive compensation ability, and has the filter and inhibit the harmonic function. 静止无功发生器采用特殊的电路结构、高频率电力电子开关器件、先进的控制算法使其具有实时、精确的无功补偿能力,并且具有滤波和抑制谐波的功能。
In addition, feedforward gain stage is proposed in this paper, which effective controls Q value of the non-dominant pole, so at high frequency negative feedback compensation loop is ensured. 除此之外该论文里的运放增加了前馈增益级,这样就有效的控制了非主极点的Q值,保证了高频时补偿环路是负反馈的。
In view of rotor position estimation error in rotating high frequency voltage signal injection caused by stator resistance, compensation formula is given and ignoring the stator resistance in rotating high frequency voltage injection method is another source of bringing rotor position estimation error. 针对旋转高频电压注入法定子电阻引起的转子位置估算误差,给出了位置估算误差的补偿公式,指出旋转高频电压注入时忽略定子电阻是产生转子位置估算误差的又一来源。