查询词典 propagation of errors

Faster than light ; microwave anomalous propagation ; tachyon ; quantum tunneling process ; evanescent mode ; negative group velocity

超光速；微波异常传播；快子；量子隧道过程；消失模；负群速

The evolution of the spectrum shows that spectrum splitting and spectral shift occur during the propagation in anomalously dispersive media.

研究结果表明，部分相干GSM光束在负色散介质中传输时会出现光谱分裂和频移现象。

The phase velocity equations of symmetric and antisymmetric modes of Lamb wave propagation are obtained for electrical open and short cases.

当薄膜厚度与波长之比较小时，相速度减小的趋势不很明显，当薄膜厚度与波长之比较大时，相速度减小的趋势明显。

The linear theory of antisymmetric ducted gravity waves supported by mesospheric thermal duct is presented, propagation and evolution of gravity wave packets in thermal duct is also simulated by using a nonlinear two-dimensional model. Numerical results show that lower atmospheric wave disturbance can penetrate into the duct area and be trapped.

给出了重力波在中层大气温度波导中的反对称形式导制传播的线性理论模型，并采用二维非线性的数值模型对重力波波包在中层大气温度波导中的传播和演变过程进行了模拟研究。

The experimental results show that in both the learning speed and correction of character recognition, the Levenberg-Marquardt Back-Propagation Neural Networks in recognition of the capital English characters and the Arabic numbers is the best approach.

从实验结果得知，无论是学习速率或字元判别的正确率，都是Levenberg-Marquardt倒传递类神经网路在辨识英数字元影像上为最佳。

Firstly it describes the development ,basic principle and application and propagation characteristic of mobile channel , then investigates the system structure of DAB transmitter and receiver separately and the key technology of realization of the digital audio broadcast system.And then discusses the system component of FFT －the demodulation module of OFDM .The 409- points FFT module employs a radix-4 decimation-in-frequency algorithm, includes arithmetic element , read and write address element ,twiddle factor element and control element , is realized by FPGA. In the end , the result is verified in the matlab .

首先概述了OFDM的发展、基本原理和应用以及移动信道的传播特性，接着分别研究了数字音频广播接收机和发射机的系统结构，以及数字音频广播系统实现的关键技术，然后详细论述了OFDM解调模块FFT的系统结构，主要研究了4096点FFT采用基－4按频率抽取实现的算法，整个FFT模块包括了运算单元、读写地址单元、旋转因子单元以及控制单元，并且在FPGA中进行了硬件实现，并在matlab环境下对结果进行了验证。

In Black-Scholes pricing model, there was five variables impact the option price that we take to be the input variable in artificial neural network, both Back-Propagation Network and Radial Basis Function Network are used. Base on the difference analysis, we find out another variable that can improve learning efficiency and affectivity.

为避免差异，以Black-Scholes模式中，五项影响权证价格之因子为输入变数，分别以倒传递网路与半径式函数网路建立模式，並藉差异分析找出可改善学习绩效之变数。

Sheep, monkeys and cows and other animals can not be conducted without manual asexual propagation.

绵羊、猴子和牛等动物没有人工操作是不能进行无性繁殖的。

The external cause includes unfitting culture conditions, strain aging, unsuitable preservation and infection virus of asexuality propagation.

针对遗传变异和环境条件引起的菌种性能衰退，提出了有效的预防措施及具有可操作性的菌种复壮技术。

The internal cause includes polarity variation , inbred variation , instability of hybridization and gene mutation . The external cause includes unfitting culture conditions , strain ag ing , unsuitable preservation and infection virus of asexuality propagation .

内因主要包括极性发生变异，自交产生的变异，杂交种性不稳定和基因突变；外因主要包括培养条件不适宜，菌种老化，菌种保藏不当和菌株无性繁殖体感染病毒。

There are different types of personal loans available.

有许多不同类型的个人贷款优惠。

The above mentioned teaching model of spiral rising can be used to avoid rigidness in teaching.

上述螺旋式上升的教学模式，可以避免教学形成模式後的僵化现象。