查询词典 frequency function

This paper introduces the development of the 2cm phase standard which uses phase-held frequency convention and synchronical phase-lock bichannel phase compari- son system.The standard features wide frequency range,wide dynamic range,high accura- cy,multi-function,and convenient operation.It was qualified by self-calibration method.

本文介绍了两厘米相位标准的研制情况，该装置采用变频保相、同步锁相的双通道比相系统，具有频率范围宽，动态范围大，准确度高，操作方便，多功能等特点，利用自校准法对装置进行了测试检定。

Feature evaluating function based document frequency with minimum term frequency threshold is present in the paper.

2针对文本关联分析中难以确定最小支持度阈值的问题，提出N个最频繁项集挖掘算法。

Using triple integral equation based on scalar Green function for forward modeling transient electromagnetic response to a 3 D anomalous body, a frequency response of electromagnetic field component has been evaluated first on frequency domain, then the evaluated results has been transformed into time domain by using fast numeric filtering algorithm.

用基于张量格林函数的体积分方程对三维异常体进行瞬变电磁响应的正演模拟，首先在频率域内计算电磁场分量的频率域响应；然后利用快速数字滤波技术将计算结果转换到时间域。

Major products of electron industry have bipolar digital IC, small exterior plastic sealing IC, single slice IC, integrated function module, thin and thick module composed IC, integration pressure sensor, semiconductor plastic down-lead frame, bipolar electrostatic induction transistor BSIT, power commutation diode SBD, microwave scanning frequency test system, ultrahigh frequency test system, waveguide coaxial system and satellite communications aerial etc.

电子行业主要产品有双极型数字集成电路、小外型塑封集成电路、单片集成电路、集成化功能模块、薄厚膜混合集成电路、集成压力传感器、半导体塑料引线框架、双极静电感应晶体管 BSIT 、功率肖特基整流二级管 SBD 、微波扫频测试系统、超高频测试系统、波导同轴系统、卫星通讯天线等。

With the premise of that valid chip forming area (the valid uniplanar inductive area of capacitance sensor) keeps stable, experiment results showed that with the definite forming height and density of chip when the moisture content varied in ranges of 5% to 25% were definite, the moisture content was exponent function as measuring frequency; when the moisture ranged in 25% to 45%, there was linear relationship between measuring frequency and moisture content of chip.

在刨花的有效铺装面积保持一定(即为电容传感器的有效平面感应区)的前提下，试验表明：当刨花的铺装高度和密度一定时，刨花的含水率5≤MC＜25％，测试频率与刨花的含水率成指数关系：刨花的含水率25≤MC＜45％时，测试频率与刨花的含水率成线性关系。

This thesis makes the analysis of the methods of frequency measurement,which is the main function of the universal counter,and decides to use the gate modification method to measure frequency.

本文对计数器的主要功能之一，频率测量方法进行了分析，提出采用闸门时间修正法进行测频，降低了量化误差的影响。

And they systematically studied the effect of the activate spleen-energy law on digestive and absorptive function, it is confirmed that the activate spleen-energy law have significant regulation effect on the action and secretion of gastrointestinal tract. Recently, we established the juvenile rat model with anorexia by imitating the major cause of children and found that the CCK-8S concentration in hypothalamus and periphery blood of the anorexy model was obviously increased .We also found the appestat that the spontaneous discharge frequency of LHA neurons was decreased and the spontaneous discharge frequency of VMH neurons was increased.

近几年，我们采用病因模拟法成功建立了幼龄大鼠厌食模型并发现该模型下丘脑和外周CCK-8S水平显著增高，食欲中枢——下丘脑外侧区神经元自发放电频率减低和下丘脑腹内侧区神经元自发放电频率增加，临床治疗小儿厌食有可靠疗效的运脾复方不仅可调节外周血中与摄食有关的肽类激素水平，如降低CCK-8S水平，而且能调节下丘脑食欲中枢神经元的自发放电频率。

The results indicate that the first ten step natural frequency range from 233.2Hz to 526.8Hz, the natural frequency is higher than the value specified by the standard.6. The profile equations of shaping gear ring are deduced out by profile normal line method. The involute and transition curves are automatically generated through the macro function in Solidworks. And the three-dimension model is built. Based on the three-dimension model, the deformation and dedendum stress is studied.

6应用齿廓法线法推导出了插齿加工的渐开线直齿内齿圈的精确齿廓曲线方程，并通过Solidworks中的宏功能采用Visual Basic语言编程实现了内齿圈齿廓渐开线以及齿根过渡曲线的自动生成，建立了内齿圈的精确三维实体模型，研究了内齿圈的轮齿变形及齿根应力。

A detector array target of laser distant-field detect system is designed, and two key factors are analyzed. To determine the size of the array target, the laser diffract effect and the influence of atmospheric turbulence are discussed, three factors that influence the resolution of the array target are analyzed. Three factors are the dimension of laser speckle resulted by atmospheric turbulence, space sampling frequency based on sampling theory and the loss of the frequency spectrum function of the array detector.

设计了一种激光远场直接探测系统，对系统中的两个关键问题进行了讨论，一、在探测器阵列靶板尺寸的确定问题上讨论了激光的衍射效应和大气湍流的影响；二、在探测器阵列靶板分辨率的确定问题上讨论了激光的衍射效应和大气湍流的影响；对第二问题讨论了对其有影响的三个方面：大气湍流引起激光碎斑尺寸，由采样定理决定的空间采样率，由阵列探测器的频谱函数引起的损失。

Some methods, in which synthesized theoretical seismogram of high frequency is taken as record signal and 20%random noise is superimposed on the seismogram, are used to analyze the theoretical seismogram. The digital experiment shows that in the correlating frequency range, Green's function method can measure precisely interstation phase velocity, but the results obtained by correlation and narrow band-pass filtering correlation methods are more dispersed.

以合成的高频理论地震图作为记录信号，并在理论地震图上叠加了20％的随机噪声，利用这些方法分析理论信号，数字实验表明：在相干频率范围内，格林函数方法能够精确测量台间相速度，而互相关法和窄带通滤波互相关法所得结果较为离散。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。