反向散射

重点完成多波束海底混响的仿真，使各基元接收的仿真信号包络服从K分布，并采用物理意义明确的Jackson散射模型计算反向散射强度的贡献。

Focus on the completion of multibeam seafloor reverberation simulation so that each channel received signal envelope obey K distribution , and use the physical meaning of specific Jackson scattering model to calculate the contribution of backscattering strength .

其次，基于RFID技术通信原理和天线的反向散射理论，分析RFID通信参数变化对系统性能的影响，结合所研发的测试平台，提出了针对RFID产品性能的组合参数分析的测试方法。

Secondly , based on wireless communication theory and the RFID backscattering principles , the impact of RFID system communication parameters changes on system performance is analyzed . With the RFID test platform , a new test method using combination parameters to test RFID performance is presented .

最后比较了两种模型的计算结果，较小的距离即为该反向散射RFID装置的最大识别距离。

The smaller one is the maximum identification range of the RFID device .

研究结果表明，反向散射RFID系统的路径损耗模型和传统无线通信系统的路径损耗模型有所区别。

The research results show that path loss models of backscatter RFID systems are differ from traditional wireless communication systems .

文章实现了用于UHF频段的射频识别（RFID）标签的时钟恢复电路和反向散射调制信号产生电路。

The clock regenerator and backscatter modulator for Ultra High Frequency ( UHF ) RFID application are implemented .

该阻抗匹配方法利用天线的寄生电感，通过调整反向散射电路的电容来改变匹配网络的容抗，从而实现ASK调制。

The approach uses the parasitic inductance of the antenna to implement ASK modulation by adjusting the capacitive reactance of the matching network , which changes with the backscatter circuit .

对于反向散射场，既然负Rayleigh极点起作用，自然地出现反向Rayleigh泄漏波。

For the backscattered field , since the negative Rayleigh pole plays a major role , a backward leaky Rayleigh wave will appear naturally .

该RFID模拟前端包括本地振荡器、时钟产生电路、复位电路、匹配网络和反向散射电路、整流器、稳压器以及AM解调器等。

The RFID analog front end includes a local oscillator , clock generator , power on reset circuit , matching network and backscatter , rectifier , regulator , and AM demodulator .

从理论上指出，现有经典的双线模型和RFID系统的室内传播模型可以用来帮助预测实际应用中无源反向散射RFID系统的传播特性。

It is pointed out theoretically that the existing classical 2-ray ground reflection model and some indoor propagation models for RFID systems can be used to help predict propagation characteristics of passive backscatter RFID systems in practical application .

通过自由空间传播模型和雷达散射横截面（RCS）模型，研究了反向散射射频识别（RFID）装置的最大识别距离。

This paper introduces the study on the maximum identification range of the radio frequency ( identification ( RFID )) device by using the free space propagation model and the radar cross section ( RCS ) model .

利用多波束测深系统获取的反向散射强度数据，应用学习向量量化（learningvectorquantization，LVQ）神经网络分类方法实现了对海底砂、砾石和基岩等底质类型的快速、有效的识别。

We utilize the seafloor backscatter strength data of each beam from multibeam sonar systems and the automatic classification technology to get the seafloor type identification maps . We primarily study on the seafloor classification using learning vector quantization ( LVQ ) neural network method .

反向散射电子图像证明，银颗粒均匀分散在鳞片石墨表面上，其平均粒径为500nm。

Back-scattering electron image proved that Ag particles disperse on the surface of flake graphite uniformly and the average particle diameter is about500nm .

应用边界元（BEM）和有限元（FEM）耦合方法对平顶有肋柱壳在声波轴向入射时的低频反向散射特性和振动位移状态进行了计算，对结果作了分析。

Low frequency scattering from cylindrical shells are calculated using the coupled finite element ( FEM ) / boundary element ( BEM ) method , and the sound backscattering measured over a ka range of 2-4.Effects of the rib on scattering echoes are analyzed .

用本方法可以识别出系统的模态参数（包括应变模态、应力模态）。由浅海混响数据提取海底反向散射矩阵的数值模拟

Numerical simulation of extracting modal back-scattering matrix from reverberation in shallow-water waveguide

水下光图象中反向散射和小角度正向散射噪声的抑制

The restraint of backscatter and small-angle forward scatter noise for underwater light image

GB/T4677.8-1984印制板镀涂覆层厚度测试方法β反向散射法

Test method of plating and coating thickness by beta backscattering for printed boards

薄样品布里渊散射的反向散射分量

Brillouin Scattering of Back scattering Components in this Samples

降低干扰和噪声对水中声反向散射信号影响的若干对策

Some Measures for Mitigating Interference and Noise from Acoustic Backscatter Signal in Water

水下摄影反向散射的研究与实验

Research and experiment on back-scattering of underwater photography

典型海底反向散射矩阵可分离性分析

Analysis of Separability on Typical Bottom Backscattering Matrix

运动介质反向散射波的演化谱

Evolutionary spectra of backscattering wave in moving medium

高频海底反向散射信号能量包络的预报

Prediction of High Frequency Bottom Backscattering Intensity Envelope

计算的溅射产额和反向散射系数同实验结果进行了比较。

The results of the calculation have been compared with those of the experiment .

微微秒领域的反向散射：波前重建的产生与其几何条件

Backward Scatterings in the Picosecond Range : Generation and Geometrical Conditions for wave Front Reconstruction

在开阔的室内环境下，完成了不同参数条件下的反向散射调制系数测试。

Modulation index of backscatter link under different parameters is measured in open indoor environment .

多波束反向散射强度数据处理研究

Study on processing of multibeam backscatter data

模拟器不对表面行波的反向散射进行建模。

The simulator at this time does not model backscatter from surface travelling wave effects .

或者是这种叫反向散射的东西。

Or this thing called backscatter .

指出了影响水下光图象质量的因素主要是反向散射和小角度正向散射。

The main factors affecting the quality of underwater light image are backscatter and small-angle forward scatter .

正反向散射型激光流速仪

Forward-back-scattering type laser current meter