but the threshold energy increases largely,and energy reflectivity is lower than that of focus.
实验结果表明,在非聚焦抽运条件下同样可以产生受激布里渊散射,不同的是阈值能量大幅提高,能量反射率也较聚焦条件下低得多,抽运能量155mJ 时仅为17%,输出能量的不稳定度达到10%。
Then,the dependence of threshold energy on the cavity length,the crystal length,the pump pulsewidth and the signal wave output coupling was analyzed in detail.
研究了准相位匹配条件下光学参量振荡理论,对单谐振情况下参量增益同极化反转周期的关系进了讨论;从理论上详细地分析了准相位匹配参量振荡器中谐振腔长度、晶体长度、抽运光脉宽以及信号光输出透过率对建立振荡所需泵浦光能量阈值大小的影响,并通过实验验证了理论分析的适用性。
In the software system of image processing,to accomplish color image segmentation and recognition,the threshold vector judgment and improved seed-fill algorithm is introduced,and the image geometric moment is(calculated) during the segmenting.
在图像软件处理中,采用阈值向量判断法和改进的种子填充法来完成彩色图像的识别和分割,在分割中计算图像的几何矩,利用全局图像的几何矩特征量构建图像雅可比矩阵,并用推导的图像雅可比矩阵完成一个图像反馈与目标运动自适应补偿的视觉跟踪系统。
The method of signal denoising based on energy threshold wavelet packet analysis is put forward.
介绍了小波与小波包分析的特点;对声发射信号进行小波消噪,比较了不同阈值下的消噪效果;并提出了基于能量阈值法的小波包消噪,其效果优于小波消噪。
From the signal energy point of view, a new method of denoising image based on wavelet packet analysis energy threshold is presented.
按照信号能量的观点,提出一种基于小波包分析对图像的高频系数和低频系数同时进行能量阈值处理的消噪方法。
Wavelet denoising based on energy threshold function was investigated to provide an effective solution for the underwater acoustic multi-path signals.
采用基于能量阈值函数的小波方法,对浅水多径信号进行消噪处理;从水声多径信道模型出发,利用小波能有效区分信号中的突变部分和噪声的优点,设计了一种基于能量阈值函数的消噪方案,即通过能量的门限阈值形式对小波系数进行处理,然后对信号进行重构即可达到消噪的目的;利用MATLAB仿真了有、无多径时消噪效果,同时将该消噪方案与湖的水声传播参数结合,进行了实际水库多径传播信号的消噪处理试验;试验结果表明,基于能量阈值函数的水声多径信号小波去噪方法不仅能够减少信号的丢失,而且能够恢复有用信号的小波系数,减少有用信息的丢失,确保重构后的信号不失真,提高信噪比,应用于水声通信中多径信道的信号去噪效果很好,体现了文中算法的有效性和优越性。
Determination and Limitation of Solanine in Feed;
饲料中龙葵素的测定方法和阈量研究
tester of two point limen
两点阈测量器 两点阈测量器
parametric oscillator threshold condition
光参量振荡阈值条件
Vector quantization based on the dynamic threshold of speaker recognition
基于动态阈值失量量化的说话人识别
Research on Artificial Hand Carrying Difference Threshold
装戴假手提举重量的差别阈限研究
Any increment above this threshold represents profit.
任何高于此阈值的增产量即为利润。
Alcohol and cirrhosis: Dose-response or threshold effect?
酒精与肝硬化:剂量关系抑或阈值效应?
Study on the losses of wheat yield and the ELT to wheat root rot
小麦根腐病产量损失及经济阈值研究
Development of Social Forces in the Construction of Harmonious Society;
和谐社会建设视阈中的社会力量培育
Performance Analysis of Threshold Denoising Via Different Kinds of Mother Wavelets and Wavelet-Thresholding Denoising Method Based on Energy Cell;
小波阈值去噪的性能分析及基于能量元的小波阈值去噪方法研究
Discussion on the Teaching Quality of Independent Colleges in the Context of the Quality of Works
“质量工程”视阈下的独立学院教学质量探析
a function that takes the value 1 if a specified function of the arguments exceeds a given threshold and 0 otherwise.
如果指定函数的量超过给定的阈和函数值是。
Quantitative Analysis of Verb-Verb Collocation Evaluation System Threshold
动词与动词搭配评价体系阈值定量分析
Therefore, the syndrome factor should be the core of the syndrome differentiation system.
辨证体系应围烧证素阈值进行定量刻画。
Low Threshold Single Quantum Well Lasers Consisting of the bridge Waveguide of Tandem Two-Section (RW-TTS)
低阈值级联双区脊形波导单量子阱激光器
Cherenkov Counter for Particle Identification Teat Beam
试验束测量中的气体阈式契仑科夫计数器
Study on Quality Inspection Technique for Gravure Printing Based on the Statistical Threshold Method;
基于统计阈值法的凹版印刷质量检测技术研究
An Overview of Flash Fiction Development and Examination of Popular Culture;
小小说发展概观与大众文化视阈的考量