The experiment results show that the method can improve the average gradient and preserve spectrum index commendably.
实验表明算法有效提高了图像的清晰度和保持了光谱特性。
After reaching a turbulent state, the system continues its evolution which exhibits that the energy spectrum index is not a constant instead of a wide range of changes in time.
模拟中，系统逐渐达到湍流状态，随着系统的不断演化我们发现如下事实：能谱指数随时间并不是不变的，而是在较宽的范围内变动；
Detection of tumor blood flow within the spectrum, recorded peak systolic velocity (PSV) and resistance index (RI).
检测肿瘤内部的血流频谱，记录收缩期峰值流速(PSV)和阻力指数(RI)。
Pressure data were analyzed by wavelet transform in wavelet domain. Frequency band energy spectrum and intensity index of ISW based on wavelet coefficient were obtained.
通过基于子波的分析方法，对压力数据进行了分析，获得了基于子波系数的频带能量谱和冲击波强度指数。
LED lighting saturated, patch fluorescent lamp, downy, spectrum pure, high brightness, show color index is high, is the new lighting products.
LED贴片日光灯，灯光饱和、柔和、光谱纯正，超高亮度，显色指数高，是新型的照明产品。
The analysis of infrared spectrum and scan electricity mirror and asphalt basic index experiment were made.
进行了红外光谱和扫描电镜分析和沥青基本指标试验。
By analyzing the spectrum characteristic of snow, a method of extracting snow information was suggested based on index of NDSI and NDVI.
通过对雪的光谱特征分析，提出利用归一化积雪被指数NDSI结合归一化植被指数进行积雪信息提取的方法。
The power index of spectrum increases with the magnetic azimuth of source flares, the distribution of which shows a marked east-west asymmetry.
能谱的幂指数随源耀斑的磁方位角而增加，分布有明显的东西不对称性。
In this paper, the power spectrum of the monthly 500 MB circulation index over Asia has been calculated.
本文计算了亚洲500毫巴月平均环流指数的方差谱。
Conclusions: The Doppler flow spectrum is an important index for differential diagnosis of thyroid lumps.
结论彩色多普勒血流频谱形态是鉴别甲状腺良恶性肿块的一项值得重视的指标。
Then the work theory, system structure, technology index, spectrum characteristic, merits and defects of Direct Digital Synthesis (DDS) are introduced mostly in the second chapter.
在第二章中，主要介绍直接数字频率合成器（DDS）的工作原理，对DDS的系统结构，工作原理，技术指标，频谱特性，优缺点进行了阐述。
This proves that it is feasible to use the technology of derivative spectrum and the method of vegetation index to monitor the pigment concentration and growth of rice.
这表明，用微分光谱技术与植被指数方法来监测水稻的色素含量和长势应该是可行的。
On basis of the spectrum distribution, we can calculate the optical and colorimeter parameter of LED such as CIE color coordinate, color temperature, color rendering index and so on.
该系统首先给出LED的相对光谱功率分布，据此计算出LED的总光通量等光、色参数。
The variations of crystal thickness and refractive index will lead to a shift of synchronous Angle of Attenuated Total Reflection (ATR) spectrum, and then bring reflectance variation.
晶体厚度和折射率的变化导致衰减全反射(atr)谱的同步角发生移动，进而引起反射率的变化。
The spectrum of fiber Bragg grating(FBG) in inhomogeneous strain fields is distorted due to its inhomogeneity of both the periods and the effective refractive index.
当非均匀应变场作用在光纤布拉格光栅（FBG）上时，由于FBG周期和有效折射率在沿FBG长度方向都为变量，所以会导致光谱形状的变化。
The curves of refraction index and extinction coefficient with different wavelength and the thickness of films were obtained from transmission spectrum.
获取了薄膜的折射率和消光系数随波长的变化曲线以及薄膜的厚度。
The holographic diffraction efficiency spectrum was theoretically calculated from the photoinduced refractive index change spectrum.
由光致折射率变化曲线理论计算出了衍射效率随波长变化曲线。
Compared with the case of positive refractive index structural defects, the influence of the interaction between defects on defect modes is stronger, the spectrum-width of defect mode is broader.
与正折射率缺陷情形相比较，负折射率缺陷间的相互作用对缺陷模的影响更大，局域模谱线更宽。
The calculation result shows that the maximum of the extinction spectrum depends on the refractive index in a linear way.
结果表明，银纳米粒子的最大消光位置随所处介电环境折射率的增加呈现明显的红移现象，两者之间的关系大体呈线性。
With the increase of the periods and the absolute value of refractive index difference, the full width at half maximum of spectrum decreases.
介质折射率差的绝对值越大、周期数增加都使透射波谱宽度变窄。
The first method calculates the refractive index of the film inversely with the measured transmittance spectrum.
另一种是用最小二乘法的优化算法实时拟合折射率。
The first method calculates the refractive index of the film inversely with the measured transmittance spectrum.
另一种是用最小二乘法的优化算法实时拟合折射率。
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