信号

基本解释 (translations)

semaphore  ·  signal  ·  semaphored  ·  semaphores  ·  semaphoring  ·  signaled  ·  signals  ·  sig

词组短语

The Signal · call sign

与信号相关的网络例句 [注：此内容来源于网络，仅供参考]

The main job and contribution of this paper are as follows:Based on narrowband signal processing, we propose a new method for FH signal blind detection and blind parameter estimation. Firstly, compute the cross-correlation function of FH signals from multichannels, then we get the cross power spectral density matrixCSDM Secondly, select the hops of FH signals from the CSDM via processing and analyzing the CSDM, meanwhile reduce the influence coming from noise, fixed frequency signal and other interferences; Lastly, estimating the DOA of every hop and according to the DOA, we can separate the hops, get the number of FH signals and their parameters. Propose a new method for designing the threshold in FH signal detection. This method makes it easy to get the threshold by theoretic computing and it can extremely reduce the interference of non-FH signals.Based on broadband signal processing, we propose a new method for FH signal blind detection and blind parameter estimation. Firstly, get the DOA of the signals by wideband spatial spectrum estimation; secondly, separate the signals by spatial filtering using wideband beamformer; Lastly, we propose two methods for FH signal blind detection and blind parameter estimation, one is for several constant hop-rate FH signals whose dwell-time are different and another is for a single FH signal whose hop-rate is alterable.By employing spatial interpolation in broadband signal beamforming, it can reduce the number of antenna elements and corresponding RF modules, A/D converters, etc. It can also eliminate the mutual coupling between antenna elements while getting the narrower main beamwidth and lower sidelobe level.

本文的主要研究工作和贡献如下：●提出了一种基于窄带处理的FH信号盲检测和参数盲估计的实现方法，即首先求出多路信号之间的互相关，进而得到互功率谱密度矩阵，然后通过对CSDM进行对折处理来抑制噪声、定频信号及其他干扰的影响，并将所有属于FH信号的hop(每一跳的驻留时间在时频图上持续的线段)从CSDM中筛选出来，最后用阵列信号处理中的到达方向估计理论在频域中估计出各个hop的方向参数，利用方位信息完成FH信号分离并得到FH信号的数目及其各自的参数集；●提出了一种确定FH信号检测门限的策略，该策略不仅使得检测门限能够通过理论计算得到，而且还显著地抑制了非跳频信号的干扰，从而能有效地检测出FH信号；●提出了一种基于宽带处理的短波FH信号盲检测和参数盲估计的实现方法，即首先利用宽带空间谱测向技术得到接收信号的DOA，然后采用宽带波束形成技术对特定方向进行空间滤波，实现多个信号的分离，最后分别提出了两种FH信号的盲检测和参数盲估计方法，第一种方法适用于空间某个特定方向上存在着几个驻留时间不同的恒跳速FH信号和其他干扰信号的混合信号，第二种方法适用于空间某个特定方向上仅含一个可变跳速的FH信号和噪声的混合信号；●将空间插值的概念和宽带波束形成技术结合起来，提出了一种基于频域处理的宽带恒定束宽的波束形成方法。

Objective To study the power spectrum density of blood flow ultrasonic Doppler signal using wavelet analysis. Method Doppler signal of blood flow in human common carotid artery was studied with wavelet scalogram analysis, an affine smoothing Wigner Ville transform with a constant "Q" character. Result Wavelet scalogram of blood flow ultrasonic signal had a higher distinguishability than STFT spectrogram in the low frequency portion, but had poorer decussation terms than spectrogram.

对于平稳信号的处理工具仍然是Fourier变换，但是，在实际应用中的绝大多数信号是非平稳的，现在看来处理非平稳信号的主要工具将是小波变换，这主要是因为传统的Fourier变换分析信号时，时间和频率分辨率精度是固定不变的，而利用小波变换分析信号，在信号高频段时间分辨率精度也较高，在信号低频段频率分辨率精度较高，这很符合非平稳信号的特点。

The use of mobile phone signal isolator, can be automatically designated to form the framework of an effective s你好eld to block mobile phone signals in the magnetic field, edsun-2010 mobile phone signal blocking s你好elding device is 10-40 meters in diameter in the range of effective to make GSM / DCS / CDMA / PHS mobile phone models, such as in你好bitory signals to the space to block the effects of mobile phone signals, so that can not be made and answered the phone, but do not affect the space outside the normal mobile phone signal transmission, leaving the MDPB set up mobile phone signal jammer-type space, the phone signal will not be interference, isolation, be able to resume normal use.

施用型手机信号断绝器，能在指定的规模内AUTO形成能够有用阻断手机信号的屏蔽磁力场，edsun-2010型手机信号阻断器的屏蔽直径是10-40米规模，在该规模内有用使GSM/DCS/CDMA/PHS等型号的手机信号被按捺，到达该空间内手机信号阻断的效验，使手机无法打出以及接听，但又不影响该空间之外的手机信号的正常传道输送，离开设置有MDPB型手机信号滋扰器的空间之外，手机信号将不会被滋扰、隔央视屏蔽外文减写离，便可恢复正常施用。

It contains: a continuous guide frequency generating module to generate DPCCH non-guide frequency emission estimation value according to input DPCCH de-spread signal and guide frequency emission signal, and combine the estimation value with the DPCCH guide frequency emission signal to generate continuous guide frequency; an average fading factor generating module to generate average fading factor of each DPCCH code according to the input continuous guide frequency and DPCCH de-spread signal; a demodulation signal generating module to generate DPCCH and DPDCH demodulation signals according to the input average fading factors and DPDCH and DPCCH de-expanding signals at the corresponding time.

这种码分多址通信系统的信号解调装置包含：连续导频产生模块，用于根据输入的DPCCH解扩信号以及导频发射信号，产生DPCCH非导频段发射估计值，并将所述DPCCH非导频段发射估计值与所述DPCCH导频发射信号合并，产生连续导频；平均衰落因子产生模块，用于通过输入的所述连续导频以及DPCCH解扩信号，产生DPCCH各个码元的平均衰落因子；解调信号产生模块，用于通过输入的所述DPCCH各个码元的平均衰落因子，以及对应时刻的DPDCH解扩信号和DPCCH解扩信号，产生DPCCH和DPDCH解调信号。

Results Metaphysis osteoporosis was observed on X-ray and CT in acute stage, the midsection of infarct of bone was isointensity on T1WI and iso/hyperintensity signal on T2WI, the edge of infarct of bone was ring-shaped hypointensity on T1WI and hyperintensity signal on T2WI. Small worm-eaten change and stippled calcification was observed on X-ray and CT in subacute stage, the infarct of bone was iso/hypointensity on T1WI and iso/hyperintensity signal on T2WI, the edge of infarct of bone was ring-shaped hypointensity on T1WI and hyperintensity signal on T2WI. Irregular and wriggle osteosclerosis was observed on X-ray and CT in chronic stage, was hypointensity on T1WI and T2WI.

结果 骨梗死急性期X线、CT表现为干骺端骨质疏松，MR T1WI骨梗死灶中央部分呈等至高信号，T2WI呈高信号，T1WI骨梗死灶边缘呈环形低信号，T2WI呈环形高信号；亚急性期X线、CT表现为小的虫噬样改变，伴有斑点状钙化，MR T1WI骨梗死灶呈等或低信号，T2WI呈等或稍高信号，T1WI骨梗死灶边缘呈环形低信号，T2WI呈环形高信号；慢性期X线、CT表现为不规则状、蜿蜒状骨质硬化，MR T1WI和T2WI均呈低信号。

Results:(1) Spin-echo sequence included axial, coronal and sagittal images. In T1-weighted images,the medulla oblongata is isointense,the cistern is hypointense; in T2-weighted images,the medulla oblongata is isointense, CSF shows hyperintense, and the arteries of posterior fossa appear hypointense flow voids. The cisternal cranial nerves are not clearly demonstrated in the routine spin-echo images. In 3D-time of flight images, the brain tissue shows isointense, CSF is hypointense, the artery shows hyperintense,and the cranial nerves show linear isointense.

2，结果：(1)常规SE序列横断面、冠状面及矢状面T1WI显示延髓等脑组织呈等信号，延髓周围池脑脊液呈黑色低信号，T2WI显示脑组织为等信号、脑脊液为白色高信号，脑底动脉在池内高信号背景下由于&流空效应&而表现为低信号，常规序列由于成像参数关系而不能直接显示脑池内颅神经；三维时间飞跃(3D-TOF)成像序列显示脑组织为等信号，脑脊液为低信号，而脑池内脑底动脉则呈高信号、脑池内后组颅神经为线状等信号。

A method of processing a series of input audio signals representing a series of virtual audio sound sources placed at predetermined positions around a listener to produce a reduced set of audio output signals for playback over speaker devices placed around a listener, the method comprising the steps of: for each of the input audio signals and for each of the audio output signals: convolving the input audio signals with an initial head portion of a corresponding impulse response mapping substantially the initial sound and early reflections for an impulse response of a corresponding virtual audio source to a corresponding speaker device so as to form a series of initial responses; for each of the input audio signals and for each of the audio output signals: forming a combined mix from the audio input signals; and forming a combined convolution tail from the tails of the corresponding impulse responses; convolving the combined mix with the combined convolution tail to form a combined tail response;for each of the audio output signals: combining a corresponding series of initial responses and a corresponding combined tail response to form the audio output signal.

提供了一种处理一系列输入音频信号的方法，所述输入音频信号代表放置在收听者周围预定位置的一系列虚拟的音频声源，该方法可以产生一组精简的用于在收听者周围的扬声器装置上进行播放的音频输出信号，该方法包括以下步骤：对每个输入音频信号和每个输出音频信号进行以下步骤：用相应的脉冲响应最初的头部对输入音频信号进行卷积以形成一系列初始响应，其中的脉冲响应充分映射了相应的虚拟声源到相应的扬声器装置的脉冲响应的初始声音和早期反射；对每个输入音频信号和每个输出音频信号进行以下步骤：形成音频输入信号的混音；并根据对应脉冲响应的多个尾部形成复合的卷积尾；用复合的卷积尾对音频信号的混音进行卷积以形成复合尾部响应；对每个音频输入信号进行以下步骤：把相应系列的初始响应与相应的复合尾部响应进行复合以形成音频输出信号。

55 Flagmen 信号旗手 When signs, signals, and barricades do not provide necessary protection on or adjacent to a highway or street, flagmen or other appropriate traffic controls will be provided.

当标志，信号和路障在一公路或大街上或其附近已不能提供必要的保护时，则要提供旗手或其它合适的交通控制措施。

First, the effects of magnetic RAM relaxation time and the rise-time of incident pulse signal on reflection signal are discussed, the relationship between the rise-time of incident pulse and relaxation time based on the energy of reflection signal is revealed. Then, the effects of magnetic hysteric, susceptibilities and saturation upon reflection signal are analyzed, the results reveal the reflection of RAM target and UWB signal design. In the meantime, dielectric relaxation time effect about dielectric RAM target is analyzed simply, and the effects of relaxation time and the width of incident pulse upon reflection signal are probed. Finally, a few RAM targets are measured in the chamber using the impulse radar experiment system which is developed by the team of anti-stealth impulse radar on Department of Electrical Engineering, National University of Defense Technology. The experimental results show the similarity of the rule of echos with the theory. From the compared results of different tagets, we concluded, compared with 15% wideband sinusoidal signal, the impulse signal has increased 10～12dB energy from the same loaded RAM target; this, in turn, shows the nonlinear effects of RAM to the echoes, and the potentiality of the impulse signal to RAM targets.

首先分析了磁性RAM的弛豫时间及入射脉冲信号的上升时间对反射信号的影响，从反射信号能量角度出发，给出了入射脉冲上升时间与弛豫时间的关系；接着分析了磁性RAM的磁滞特性、磁化率及磁化强度对反射信号的影响，给出了RAM目标辐射和有关UWB信号设计的一般性结论；其次，对介电RAM的弛豫时间效应作了简单的分析，探讨了介电弛豫时间及入射脉冲宽度对反射信号的影响；最后利用国防科技大学电子技术系&反隐身冲激雷达技术研究组&研制的冲激雷达实验系统，在微波暗室中对几种不同的RAM目标进行了测量，结果表明：其反射波形的基本规律与上述理论分析相一致；从各种不同目标回波的能量对比结果得出，涂覆RAM目标对冲激信号的吸收比15％带宽的正弦信号要小10～12dB，证实了RAM的非线性效应对回波的影响，也证实了冲激信号反隐身的潜力。

This article introduced based on the Labview8.0hypothesized sine, the cosine, the square-wave, the saw-tooth wave,the triangle wave signal generating device realization May accordingto the need, the change profile frequency and the peak-to-peak value,preserves the profile the analysis parameter to assign the document,and introduced based on the USB data acquisition card dummy signaloutput LabVIEW,虚拟仪器,保存数据,信号发生器 LabVIEW, the hypothesized instrument, preserves the data, the signalgenerating device

本文介绍了基于Labview8.0的虚拟正弦，余弦，方波，锯齿波，三角波信号发生器的实现。可以根据需要，改变波形的频率和幅值，保存波形的分析参数到指定文件，并介绍了基于USB数据采集卡的虚拟信号输出。关键字：LabVIEW，虚拟仪器，保存数据，信号发生器问题补充：请不要直翻，中国式英语我不要。逐词翻译组成的句子我也会。我只要正确的翻译。不是正确回答不要打扰

与信号相关的网络解释 [注：此内容来源于网络，仅供参考]

analog signal：模拟信号

幅值是连续的连续信号,又称为模拟信号(analog signal),连续信号的幅值也可以是离散的. 例如,图1.1(a)与(b)分别表示一个模拟信号和一个具有离散幅值的连续信号. 离散时间信号的时间定义域是离散的,并简称为离散信号,它只在某些不连续的指定时刻具有函数值.

audible signal panel：音响信号盘,声频信号盘

音频信号,声响信号 audible signal | 音响信号盘,声频信号盘 audible signal panel | 声频检验,音频信号试验 audible test

baseband signal：基带信号

基带信号(Baseband Signal)直接用两种不同的电压来表示数字信号1和0,因此我们将对应矩形电脉冲信号的固有频率称为"基带",相应的信号称为基带信号. 基带传输(Baseband Transmission)指通过有线信道直接传输基带信号,一般用于传输距离较近的数字通信系统,

baseband signal：基本信号,基带信号,基频带信号

baseband response function 基带响应函数 | baseband signal 基本信号,基带信号,基频带信号 | baseband signalling 基带信号传输

CFL：呼叫故障信号

向建立不成功消息组包括以下信号: 交换设备拥塞信号(SEC) 交换设备拥塞信号 电路群拥塞信号(CGC) 电路群拥塞信号 国内网拥塞信号(NNC) 国内网拥塞信号 地址不全信号(ADI) 地址不全信号 呼叫故障信号(CFL) 呼叫故障信号 用

digital signal processor：数字信号处理

但随着现代数字信号处理(Digital Signal Processor)技术在国产移频信号解调中的应用,国产移频信号显现出诸多不合理之处. 例如,早期调制信号的设计不符合信号的正交性,大部分频率采用DSP 解调难度大;调制信号频谱分布不合理,占用频带宽,容易受到干扰,

false status signal：错误信号(错误状态发生的信号)

status signal正常信号(正常状态发生的信号) | false status signal错误信号(错误状态发生的信号) | alarm signal operation报警输出(探测器捕捉到的异常发生的信号)

LOS：线路不工作信号

群拥塞信号(CGC) 电路群拥塞信号 国内网拥塞信号(NNC) 国内网拥塞信号 地址不全信号(ADI) 地址不全信号 呼叫故障信号(CFL) 呼叫故障信号 用户忙信号(SSB) 用户忙信号 空号(UNN) 空号 线路不工作信号(LOS) 线路不工作信号

SST：发送专用信息音信号

信号(NNC) 国内网拥塞信号 地址不全信号(ADI) 地址不全信号 呼叫故障信号(CFL) 呼叫故障信号 用户忙信号(SSB) 用户忙信号 空号(UNN) 空号 线路不工作信号(LOS) 线路不工作信号 发送专用信息音信号(SST) 发送专用信息音信

advance starting signal：总出站信号机;总出发信号机

出站信号机;出发信号机 starting signal | 总出站信号机;总出发信号机 advance starting signal | 线群出站信号机;线群出发信号机 group starting signal