查询词典 signals

The paper will show that, if appropriate time information are added into the signals over the Loran-C data channel (studied in the first part of the paper) or in which the current multi-chains signals can be skillfully dealt with(studied in the second part of the paper), the independence of Loran-C for precision timing can be perfected, as well as the precision of timing signals and the automatization level of UTC synchronization can be improved, thereby the Loran-C can be acceptant and employed widely.

本文通过研究认为，在罗兰C信道上增加合适的时间信息或利用多链罗兰C信息，能够完善罗兰C高精度授时的自主性，提高定时信号的精确度和用户定时的自动化水平，从而提升该系统的可利用度和可接受程度。作者所做工作及主要成果如下

In the microcomputer monitor and control system we often require to acquisit all kinds of analog and digital signals fitstand then use the microcomputer system to process and analysis all kinds of the signals which we have acquisited,after that we can only use the processed and analyzed signals to control the object which we want to control.

在微机测控系统中，经常需要采集各种模拟、数字信号，再利用微机系统对采集到的信号进行分析处理，之后才能利用经过分析处理的信号对控制对象进行控制。

An information fusion technology was successfully coupled to the analysis of original weak electrical signals in Bellis perennis, which consisted of a touching testing using platinum sensors in a system of self\|made double shields, the signals denoised by the wavelet soft threshold and a forecast system of time series by the autoregressive integrated moving average constructed with plant characters of electrical signals.

将自制的具有铂金传感器的双重屏蔽微弱电信号测试系统，所获取的植物微弱电信号、小波软阈值消噪、时间序列的求和自回归移动平均模型等单因素分析耦合成信息融合技术，对雏菊电信号时间序列进行了数据融合分析预测。

Then, the relation between vibration and sound, the acoustic holography method, the indeterminacy and identifiability of BSS, the BSS algorithm are discussed in detail. Based on above researches, the dissertation is divided in following four sections. The first section investigates the BSS algorithm suitable to acoustic feature separation. The algorithm of the joint approximate diagonalization of eigen-matrices is proposed. The spectra or the time-frequency distributions of source signals are the interesting features in ABD and they are separated from mixing signals by JADE algorithm. Then, the convolutive mixing model is transformed into a high-dimension instantaneous mixing model, and the deconvolution of source signals is achieved by the joint approximate block diagonalization of eigen-matrices. The proposed algorithm has a global minimum, and it is unsensitive to noise interference.

论文首先概述国内外声学诊断研究进展与盲分离研究进展，给出机器噪声声场与盲分离的数学描述，讨论了声振辐射、声全息、盲分离模型、盲分离可解性、盲分离结果不确定性、分离算法等基本问题，在此基础上，论文的研究工作分为以下四个部分：第一部分研究适用于声学特征分离的盲分离算法，提出基于特征提取的联合近似对角化盲分离算法，该算法以频谱特征或时频特征作为分离目标，从混合信号中分离源信号频谱特征或时频特征，最大限度地保留了与声学特征提取有关的频谱特征或时频特征，采用模型变换把卷积混合模型变换为一个高维瞬时混合模型，通过联合近似分块对角化算法实现源信号频谱特征与时频特征的盲反卷积。

At present,the analytic tools used for the power signals in microcomputer protection include FFT,Kalman filter and finitely shock response filter,etc.They are effective to analyze stationary signals but localizable for unstationary signals analysis.Especially it is difficult to identify nonlinear fault,e.g,the nonlinear high impedance short trouble is along-term unsolved problem of power system.

目前，用于微机保护中的电力信号分析工具有FFT、Kalman滤波器、有限冲激响应滤波器等，它们对于平稳信号的分析是高效的，但在分析非平稳信号中有其局限性；尤其对非线性故障识别困难，如探测高阻抗非线性短路故障便是电力系统一个长期没有很好解决的问题。

It can be in the form of spurious signals If the amplitude of these spurious signals is outside agency-reference-recommendation value, they could cause undue disturbances to other users by entering the receiver systems of other RF bands The generation of spurious signals from a transmitter could be the result of imposed varying antenna loads, noisy voltage-supply lines to the stages of the transmitter, or noncontinuous battery-voltage supply to RF energy from the host.

传输器的不稳定是指传输器产生的伪真信号，这种不稳定性的伪真信号的形成出现，如果它们的振幅超过代理服务器允许值就会进入其它波段的接收系统，干扰使用者，强制性的天线改装，伴有嗓音的电压，断续的供电都会产生为伪真信号，有些电池装配线可接收并解调这种能量，并生成嗓音，然后由经供电线路进入主传输器。

Optical digital signal repeaters are studied using NLIF and BILED switches. The RZ repeater has the capability to retime, reshape and amplify incoming optical signals. It is not only applicable to the regeneration of signals in optical communication system, but also applicable to the synchronization of signals in optical computing systems.

用光学双稳开关构成的RZ码信号再生器同时具有放大、时钟恢复和信号整形三种功能，不仅能用于光通信系统，进行信号的中继放大，也能用于光计算系统，实现信号的同步。

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。

In contrast to the ubiquitous rising-sun-with-rays military flag of the Japanese, Chinese banners and ensigns feature a range of designs.

与遍地都是的太阳军旗不同，中国人的旗帜和徽章设计得各式各样。

From their small corner of Feng's Guangzhou headquarters -- a jumble of pink leashes, squeezable rubber steaks, and plastic doggy Santas for Fido's stocking -- Soleil's designers come up with at least five new products a month.

从Feng 设在广州总部的产品展示柜台上可以看到，Soleil的设计师每月至少设计出5件新产品。