查询词典 communicate by signals

The Daubechies second order wavelet was firstly used to decompose pressure signals at different rotative speeds to 1—9 scale detail signals and scale approximation signals.

对浸没循环撞击流反应器不同转速下的压力波动信号用 Daubechies 二阶小波在 1～9 尺度下进行分解，并分别对分解的信号进行 R/S 分析。

This mechanism converts satellite signals from high frequency transmittable signals to low frequency signals for local receivers.

这一机制的转换卫星信号从高频transmittable信号，低频信号为本地接收机。

Though analyzing and studying the following conclusions are gotten:(1) The fault features can be extracted from the unstably and stably vibrant signals in different extents by the methods of STFT, WPARMS and SOCS effectively (2) The acceleration signals not only possess far higher signal-noise rate of feature information than that of the stable, but also conceal the feature information which has not in the stable signals.

通过分析与研究，得出了如下结论：(1)短时Fourier变换、小波包AR谱、二阶循环谱均能有效处理发动机稳态和非稳态振动信号。它们都能在不同程度上提取出包含在振动信号中分析对象的故障特征。

The transmitter takes advantage of the eigenvectors of the SCM of the correlated channels to spread and weigh the signals of each layer. The spatial eigenbeams are formed to carry the signals being spread. The receiver distinguishes the signals from different beams via dispreading operations; therefore co-channel interferences are eliminated effectively.

发射机利用信道空域协方差矩阵的特征矢量，对每一层发射码元进行扩频和特征波束形成加权，形成正交的空域特征波束来承载扩频后的信号码元；接收机则通过解扩处理分离来自不同波束上的信号，有效地抑制了共信道干扰。

Compare the data structures of pressure fluctuation signals and AE signals both sampled in gas-solid fluidized bed, and the difference of data structures among AE signals sampled in gas-solid fluidized bed, pneumatic transport tube, slurry bubble column, liquid-solid loop reactor, and liquid-solid stirred tank. Based on the compare, the corresponding relation between signal structure and physical multi-scales was established.

通过对气固流化床的声发射信号与压力脉动信号的结构比较，以及气固流化床、气力输送、气液固淤浆鼓泡床、液固环管及液固搅拌釜中声发射信号多尺度结构差异比较，建立了多相流体系随机信号多尺度结构与物理多尺度的对应关系，认为在有固体颗粒存在的多相流体系，微尺度信号代表了颗粒相对于主体流动的运动状态；介尺度代表主体流相对于系统的运动或者不同主体流之间的相互运动；宏尺度则反映整个系统状态随时间的变化。3。

The signals during transformer impulse test are considered to be evolving in time, also is non-stationary signals, so we can design a software algorithm for noise reduction based on discrete Gabor transform, and the basic principle is: The Gabor coefficients of Effective signals during transformer impulse test is centralized in the time frequency range, and the peak-to-peak value is big, whereas the noise Gabor coefficient distribute in the entire time frequency range equally, the peak-to-peak value is small, we can realize the desired signal and the noise separated through frequency mask function.

考虑到冲击试验中的信号都是时变信号，也就是非平稳信号，因此设计了一种基于离散GABOR变换的软件滤波算法对冲击信号进行滤波，其滤波理论依据是：有效信号的Gabor系数在时频域分布比较集中，幅值比较大，噪声的Gabor系数均匀分布于整个时频域，幅值较小，通过构造时频掩模函数来实现有效信号与噪声的分离。

It is faster for testing signals into pulse signals than into digital signals, suitable for low-consumption, low-cost and small size design.

采用将检测信号转化为脉冲信号，比转化为数字信号更快更简洁，适宜于低功耗，低成本和小体积的设计。

Abstracts: To sample high speed random signals without drop, a design of O-shaped high speed random signals acquisition card based on the CPLD and its realization are presented. It consists of same three sets of acquisitive circuits, which construct O-shaped structure to sample the signals without drop .And it adopts threshold judging method to determine the valid data in the process of the acquisition, abandons vast of the redundant useless data at the same time, it only sends the useful data to the host computer by the way of DMA, so it is easy to processing the data. The design is concise and reliable. The sketch map of the logic circuit and the explanation of the main parts are presented. This design has been applied in the engineering project of sampling α nuclide.

为了对随机到来的信号进行不丢失的高速采集，提出了一种基于CPLD的随机信号环形高速采集卡的设计与实现；通过采用三套采集电路形成一个环形结构，可以对随机到来的信号进行不遗漏的高速采集，而且在采集过程中利用阈值的方法鉴别出有用信号，并舍弃了大量的冗余无用数据，从而只将有用数据以DMA的方式传于主机，便于进行信号的处理；电路设计简洁可靠，并给出了主要的逻辑电路示意图与主要部件说明；该系统已经应用在采集α核素的工程实践中。

In addition, we proposed a new approach to implement a descrambler. The security problem of speech communication has always been a demanding problem in military and business areas. A common approach to realizing end-to-end security is the use of a scrambler. Most of the scramblers are based on the permutation of speech signals in the time domain and/or frequency domain. On the other hand, descramblers are used to eavesdrop information from scrambled speech signals. We treated the descrambling problem as a puzzle solving problem. Some speech signals were used to demonstrate the performance of the proposed methods.

接著我们将此演算法应用於语音通讯保密的语音解搅拌器上，语音通讯保密已经被广泛应用在军事与商业领域，一般的作法是将语音搅拌器使用在端点对端点的保密上，而大部分的语音搅拌器都是以时域与频域为基础来进行排列搅拌，另一方面语音解搅拌器也必须防止窃听者盗取搅拌后的语音讯号，在此实验上，我们将语音解搅拌的问题视为解拼图的问题，并且利用我们所提出的解拼图方法来实作其应用，最后我们采用一些范例来展示其结果。

The data collection program is designed for collecting the exit pressure signals, main oil pressure signals and piston displacement signals. Experiment has done on the concrete pump on construction site.

设计了混凝土出口压力信号、主油压压力与活塞位移信号的数据采集程序，对现场施工的混凝土泵车进行了试验。

We are in a good position to meet your requirements.

我们完全可以满足你方的需求。

We are all pervade d with a sense of disaster.

我们普遍有大祸降临的感觉。