衰减时

本文主要研究了存在多径衰减时CDMA的检测问题。

In this paper , we discuss detection problem of CDMA in multipath fading .

推导出了N端口网络测量驻波和衰减时产生的最大测量误差公式。

A formulation of the maximum error for the VSWR and attenuation of an N-port network is derived , which can be used in error analysis when measuring a microwave network .

与其他数值软件一样，用三维离散元程序（3DEC）模拟应力波在节理岩体中的传播和衰减时，模型参数对模拟结果有很重要的影响。

Model parameters have the important effects on three-dimensional distinct element code ( 3DEC ) modeling of the stress wave propagation and attenuation in jointed rock masses as well as other codes .

由新理论取得的结果容易解释Rinehart提出的冲击波衰减时的等速疑案（Paradox），并应用于解释冲击尾波破坏现象以及力偶应力的影响。

Theoretical results obtained were used to the interpretations of the equal velocity paradox in shock wave attenuation which was noted by Rinehart , to the tensile fracture phenomena caused by the trailing part , of . compressive shock wave , and to the influence of couple stress . These .

考虑衰减时变压器短路电磁力的数值计算

Numerical Calculation of S-C Electromagnetic Forces of Power Transformer with Attenuation

考虑声衰减时抗性消声器的传递矩阵

Transmission Matrix of Mufflers with Sound Energy Dissipation

计算并分析了复合末制导系统的潜在增益、抗干扰性能及存在传播衰减时的系统检测性能。

The latent gain and the anti - interference performance are simulated and analyzed .

进行振铃衰减时，起初电阻较小，振铃衰减很快，但直流电流较大；

But the DC current is large .

利用旋转波近似方法给出了共振激发和无衰减时粒子数运动方程的解析解。

With rotating-wave approximation , the non-dam ped solutions of the dynamic population equations with resonance excitation were deduced .

在能量空间中，当梁的能量非一致衰减时，由初始条件得到了梁的能量多项式衰减估计。

In the case of nonuniform decay in the energy space , we derive explicit polynomial decay estimates valid for regular initial data .

当超声波信号有较大的变形和衰减时，在互相关函数方法作时延估计之前，需要采用信号处理的方法降噪以提高时间测量精度。

Because of the pulse high attenuation and distortion , signal processing method should be used to improve the accuracy of time delay estimation .

当表面存在无序但无梯度衰减时，体系的平均电导随无序度增强先减后增，出现类局域-退局域性转变。

In the absence of disorder gradient , the average conductance firstly decreases and then increases with disorder strength , indicating a localization-delocalization transition exists there .

在表面无序区无梯度衰减时，持续电流随无序度的变化先减小后增大，观察到类弹道和局域性的转变。

In the absence of disorder gradient , the persistent current firstly decreases and then increases with disorder strength , indicating a localized-ballistic-like transition existing there .

利用多镜理论以两种不同方法推导了在多腔级联法布里珀罗滤波器件中引入衰减时信号透过率的传输矩阵算法。

A matrix treatment is presented by two different methods based on multi-mirror theory to calculate the transmission characteristics of the multi-cavities Fabry-Prot filters with attenuation .

当信道有深度衰减时采用线性预编码的情况下，算法在比原有方法传输效率有较大提高的情况下也能有效地跟踪信道的变化。

It is also effective to track the channel with deep fading under the condition that transmission efficiency has been increased obviously when linear preceding technology is used .

分析表明，旋转涡旋作用于燃料面会产生一个向上的拖拽力，其在火旋风形成和衰减时起着重要作用。

The drag force is generated by the fire whirl vortex acting on the liquid fuel surface , which plays an important role in the initiation and decay of fire whirls .

结果表明：测量0.1分贝的样品衰减时，随机误差约1.5%，总误差不大于10%。

Experimental data show that when attenuation of waveguide is on the order of 0.1 db , the random error is about 1.5 % , and the total error is more than 10 % .

酒店的基层员工在酒店产品质量下降、经济效益衰减时，会做出的不同回应。

First of all , this paper mainly studies the different responses of the staff at the basic level of hotel , which fell into the drop of its products quality and the decline with its economic benefits .

对于两成分宇宙，如果密度扰动的增长时标及衰减时标满足适当的关系，则该扰动能在一种成分中触发增长扰动，而在另一成分中却是衰减的。

For a two-component universe , if the time scales of growth and damping for a density perturbation satisfy some suitable relations , the perturbation can trigger growing response in one component , but damping in the other .

当表面无序线性衰减时，平均电导在强无序区稍有增加，而当表面无序高斯型衰减时，平均电导指数衰减，类局域-退局域性转变消失，不同于以前的理论预言。

In the presence of linearly decaying disorder , the average conductance increases slightly in the strong disorder region . In the case of the Gaussian-type decaying disorder , the average conductance decreases exponentially , the localization-delocalization transition disappearing , which is different from previous theory .

在采用电压电平差法测量固有衰减时，由于测量仪器的输出阻抗、输入阻抗与被测信号传输线的特性阻抗的不匹配，将造成测量误差，本文详细论述其误差的修正。

Measurement of inherent attenuation by the method of voltage level gap has errors caused by the unbalance between the input / output impedance of the measuring instrument and the characteristic impedance of the signal wire under test . This article discusses in detail the rectification of the errors .

分析和仿真结果表明：在电力线这种通信媒质中，采用OFDM调制技术可以很好地配合电力线通信信道，有效地抵御电力线信道噪声、衰减和时变特性所带来的影响。

Our analysis and simulation results show that , OFDM technology can perfectly work with the power line channel and effectively defend the impacts from noise characteristics , attenuation characteristics , time-varying characteristics .

当考虑输入时域约束和衰减响应时，还提出了一种基于LMI方法的多目标多约束的输入多采样率模糊数字控制方法。

Moreover , when considering multi-objective and multi-restriction problems such as limited control input and response decay rate , a multirate input fuzzy control method based on LMI technique is addressed .

计算有、无衰减校正时线源扩展函数的半高宽（FWHM）及线源峰值计数。

The full width at half maximum ( FWHM ) of the line resource spread function and the peek pixel counts of the line resource were calculated with and without AC.

当增大噪声的衰减常数时，平均电流峰会有类似上述变化。

A similar change appears while we increase the decay constant of the noise .

最后，通过两相介质两个数值实验，验证了该边界条件在模拟衰减波时的精度。

The accuracy of modified MTF is also tested by numerical examples of two-phase media .

数字通信用陡衰减恒时延晶体滤波器&相位补偿法的实践

High Slope Attenuation and Constant Time-Delay Crystal Filter for Digital Communication ── Practice of Phase Compensation

本文结果也可供推导我国其它地区的地震动参数衰减规律时参考。

Results of this paper can be used as reference for estimation of attenuation law of ground motion parameters in other regions of China .

傅立叶算法在分析基波和非整次谐波以及直流衰减信号时，存在一定的误差。

Some certain errors are existing for analyzing the sinusoidal signal of fundamental harmonic , non-integral harmonic and the decay quantity signal of direct current .

只有在修饰态之间最小间距远大于原子衰减速率时，外部增益峰才能被很好的分开。

The outer adjacent gain peaks are well separated from each other when the minimal spacing between dressed states is far larger than the atomic decay rates .