查询词典 frequency curve

In the paper only the range of normal value and the description of frequency distribution are discussed. In theory the widely-used percentile method to determine the range of normal value is imperfected. Curve fitting method show some advantage in determining the range of normal value, but is difficult to calculate.

从理论上说明了现在常用的确定正常值范围的方法存在一定的问题，尤其证明了大家使用得比较多的百分位数法存在的缺陷，说明了曲线拟合法的优点，而在频数分布拟合完成之后，就已经找到了频数分布资料的理论分布曲线，有了理论分布函数，我们利用分布函数计算正常值范围就比较容易，也比较准确。

An efficient curve fitting technique of the tabulated frequency-dependent parameters is proposed to the modeling of multiconductor transmission lines.

提出了一种简单而有效的离散频变参数拟合方法，应用于多导体传输线的复频域建模。该拟合方法对所有参数的频变形式没有任何限制，具有简单通用等优点。

If these results are applied in the current probabilistic seismic hazard analysis, then, for the lower annual frequency of exceedance of peak ground acceleration, the predicted α from the hazard curve could reduce by 30% or more compared with the current PSHA model used in the developing of seismic hazard map in the USA.

如果将所得的研究结果应用于概率地震危险性分析中，对于较低的年超越频度，近断层附近的地表峰值加速度的估算值可下降15%~30%。

The measurement of frequency responsal curve give a good results.

灵敏度比涂覆前提高3～6dB，频响范围向高端展宽3kHz。

This paper introduces eight methods of time-frequency analysis,such as Hilbert transform,Hilbert-Huang transform, sine curve fitting ,Ricker wavelet matching,short time Fourier transform,wavelet .

本文介绍了Hilbert变换、Hilbert-Huang变换、正弦曲线拟合、雷克子波匹配、短时傅立叶变换、小波变换、S变换以及Cohen类这八种方法，并从时间分辨率、频率分辨率，以及对多频率成份信号适应能力等各方面阐述了各种方法的优缺点，对其中的一些方法结合了理论记录进行了试算，进一步阐述了这些方法的长处和不足之处。

However, various methods are used to suppress surface waves from shooting to receiving in the process of seismic survey, thus research should be carried out in the following aspects:① joint inversion with surface wave, refraction first break and microlog data;② offset range and the relation between group interval and surface resolution suitable for use in surface wave analysis;③ the influences of lateral relief of array on propagation of surface waves;④ method for Hi-Fi purification of surface wave signals;⑤ method for extracting dispersive curve through time-frequency analysis;⑥ forward modeling and in-version methods of surface wave in view of three-layer structure.

但石油勘探从激发到接收，都采取各种方式来压制面波，因而需要开展多方面的研究：①结合面波、折射初至波和微测井信息的联合反演；②地震记录中适合面波分析的炮检距范围、道间距与表层分辨率的关系；③排列横向地形起伏变化对面波传播规律的影响；④高保真提纯面波信号的方法；⑤运用时频分析提取频散曲线的方法；⑥针对三层结构的面波正反演方法。

The breading of magnitude-frequency relation curve and its mechanism.

地震活动频度—震级关系曲线拐折及其力学机制研究。

This dissertation put forward a method of eliminating noise and reconstituting broken wires signal and inquired the space-frequency range of the signal ripple resulted from tensile stress on the MFL signal curve.

提出了去除干扰重组断丝信号的方法，分析了漏磁曲线上应力波纹的空间频率分量。

The curve of sunshine deformation and frequency chart of kinematic deformation has important direction meaning on high-rise building construction.

建筑物的日照变形曲线和动态变形频谱图对高层及超高层建筑的施工有重要的指导意义。

GPS location technology is first used in Construction Bank building of Xiamen. It has built the control network of floor construction; Precision of location and setting out can meet the needs of high-rise building construction; Deformation curve reflects the law of sunshine deformation; Frequency spectrum chart of kinematic deformation monitoring reflects kinematic feature and the law of deformation.

GPS定位技术在厦门建设银行大厦工程的首次应用，建立了施工楼层的GPS定位控制网，其定位放样精度完全能满足高层及超高层建筑施工的要求；日照变形监测的变形曲线，反映了建筑物的日照变形规律；动态变形监测的频谱图，反映了建筑物的动态特征和变形规律。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。