Though band ratio is highly evaluated as a single method in oil-gas exploration, the effect is far from satisfactory.
在基于单一方法进行油气勘探的过程中，前人对波段比值的方法给了很高的评价，但效果均不显著。
In this paper we build chlorophyll-a models based on TM data, in which the traditional band ratio approach and mixing spectral analysis model were used.
由于经验模型的缺陷性，还提出了基于TM数据的水体混合光谱分析模型，同时分析了端元光谱提取方法对模型求解的影响。
This paper discusses the band combination method and nonlinear band ratio image for CBERS-1 CCD image based on knowledge by selecting analysis and application.
本文论述了基于知识的CBERS - 1CCD图像分割的波段优化组合方案。以及组合运算生成非线性波段比图像和筛选分析与应用。
The theoretical and experimental results are presented, which show the low axial ratio and low loss characteristics over octave frequency band of the polarizer.
给出理论和实验结果，证明了这种四层曲折圆极化器可以在倍频程范围内得到良好的低轴比、低损耗特性。
The analytical results show that porosity, void ratio, increment of porosity, increment of void ratio, rate of porosity and rate of void ratio are non-homogeneous in shear band.
结果表明，剪胀后的孔隙度、孔隙比、孔隙度增量、孔隙比增量、孔隙度变化率及孔隙比变化率均具有局部化特征，在剪切带中部其值最大。
For all three kinds of three-dimensional photonic crystal structures, their band gap width and band gap ratio can be improved with the increase of dielectric constant ratio.
对于不同的三维光子晶体结构，随着介电常数比的增大，完全禁带的宽度和带隙率也会随着增大。
The midgastric-transverse band(MTB), distal gastric and proximal gastric area, gastric emptying ratio and clinic symptom integral were observed. The relativity among the four ones was discussed.
观察胃中间横带宽度（MTB）、近端胃和远端胃面积、胃排空率、临床症状积分，探讨其相关性。
The method defines the ratio of maximum energy band spectrum to total power spectrum as an eigenvalue of SEMG, which decreases the individual difference effect to the lowest.
该方法的主要特点是以实时取得的SEMG功率谱信号为基础，确定最大功率谱附近的谱能量与全信号段谱能量之比为特征值，将人的个体差异影响降低到最低程度。
Based on average S/N ratio of each sub band, the mobile station feeds back the word of data rate control (DRC) obtained by looking up the table.
系统采用闭环反馈方法，移动台根据每个子带的平均信噪比查表得到数据速率控制字DRC进行反馈；
Based on local signal to noise ratio, the method estimates characteristic component of speech sound sub band covered by noise.
一种根据局部信噪比，估计受噪声掩蔽的语音子带特征分量的方法。
Local void ratio and average void ratio in shear band are investigated as residual shear strength is reached.
在流动剪切应力为残余剪切强度时，对剪切带内部的局部孔隙比和平均孔隙比进行了理论分析。
The influence of three main factors such as lattice structure, packing ratio and dielectric constant ratio on complete forbidden band of 2-d air cylindrical photonic crystal is studied.
研究了晶格结构、填充比、介电常数比三个主要因素对二维空气圆柱型光子晶体完全禁带的影响。
A noise reduction algorithm used in speech signal processes which is referred to as LMS adaptive noise reduction, is also designed to reduce wide-band noise but improve signal to noise Ratio.
此外本文还设计一种语音信号自适应噪声消除算法，利用LMS自适应算法的特点抑制语音信号中的宽带噪声信号，提高信噪比。
Finding out the major concentrated frequency band of tool-wear information can enhance SNR (Signal Noise Ratio) and improve tool-wear degree recognition result.
找出刀具磨损信息在可听阈内的主要集中频段能提高切削声信号的信噪比，改善识别结果。
The circular region F-norms in low frequency band of wavelet transform is used as color feature of the image and the energy ratio of high frequency band is used to form texture descriptor.
颜色特征采用整数小波低频系数矩阵中环形区域的F -范数，纹理特征则采用高频部分的能量比值。
In the receiving system, the narrow-band interference filter is introduced in order to reduce the background light, increase the signal transmission rate, and improve the signal-to-noise ratio.
在接收系统中，引进窄带干涉滤光片，减少背景光的干扰，增加信号光透射率，改善信噪比。
The special band of TN1 population maybe link with avirulence, it was quality character confirmed by genetics experiment and tested by X2-test, followed 3:1 segregation ratio.
TN1种群的特异片段，可能与弱致害连锁，经遗传学实验卡方验证，为质量性状基因，遵循3：1的分离比例。
The larger the ratio of refraction index, the more obvious is the band gap.
折射率的比值越大，则禁带越明显。
This paper studies high decimation ratio of digital downconverter given narrow-band signal, and especially analyze mul? stage decimation algorithm based on CIC filter and HB filter.
本文研究了窄带信号条件下，高倍抽取的数字下变频设计，重点分析了基于CIC滤波器和HB滤波器的多级抽取算法。
The effects of pump ratio and fiber length arrangements on the output characteristics of the L-band SFS in terms of mean wavelength, spectral linewidth, and output power are analyzed.
分析了抽运比例以及光纤长度分配对光源的平均波长、光谱线宽和输出功率的影响。
Based on numerical and experimental results, for separation channels with a width of 80/ ttn , 31% is the optimal constriction ratio to reduce band broadening by introducing narrowed turns.
综合数值计算和实验结果，对于宽度为80μm的分离微通道，采用收缩弯曲微通道降低样品区带增宽时的最优收缩比为31%。
The improved algorithm selects the band width and down sampling ratio with the shortest computation time in accordance with the parameters.
在保证频谱细化要求下，此改进算法可根据参数选择运算量最小的滤波器带宽和选抽比。
So the tape recorder which adopts this magnetic head can be used for wide band direct replay and makes signal-noise ratio improvement, it is an ideal playback head.
因而录放装置使用上该磁头后，可以用于宽频带直接重放，且能够使信噪比得到很大改善，该磁头是一种理想的重放磁头。
Based on the model, the BER Bit Error Ratio performance is analyzed for narrow-band modulation and wide-band spread -spectrum modulation of coherent PSK Phase Shift Key...
结果表明移动卫星信道中存在的多径和阴影现象使系统的误码性能恶化，而采用宽带扩频调制则可极大改善系统的性能。
The normalized form of shear modulus vs. strain amplitude will be shown by a single curve, and that of damping ratio vs. strain amplitude by a family of curves or a band zone with shrunk ends.
经归一化后，前者在平面上表示为单一的一根曲线，后者则表现为一簇曲线或两端是尖灭、。
The normalized form of shear modulus vs. strain amplitude will be shown by a single curve, and that of damping ratio vs. strain amplitude by a family of curves or a band zone with shrunk ends.
经归一化后，前者在平面上表示为单一的一根曲线，后者则表现为一簇曲线或两端是尖灭、。
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