查询词典 trouble back signal

Based on the spectral correlation theory of CS signal,a cyclic spectrum detection method of SS signal using acousto-optic signal processing technique was presented.

基于循环平稳随机信号的谱相关理论，提出了一种采用基于声光信号处理技术的扩频信号循环谱检测方法。

Meanwhile, the high master frequency band signal acquisition channel makes full use of the cymoscope sensitivity and hardware dynamic range, has larger analog signals front-located gain, thereby reinforcing the signal-noise ratio of the high master frequency band signal, and bringing along benefits for the later stage high resolutions seismic data process.

同时由于高主频频带信号采集电路充分利用了检波器的灵敏度和硬件动态范围，具有较大的模拟信号前置增益，使得高主频频带信号的信噪比得到增强，为后期高分辨率地震资料处理带来了较大益处。

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。

In order to change the electric signal to optical signal and recover to electric signal, the system circuit includes analog-to-digital converter, serializer/deserializer, and digital-to-analog converter and level translators.

在保证稳定传输一路视频信号、一路串口信号和四路正反向控制数据信号的基础上，组建了主站和单站间局域网，实现了单站和主站间的数据高速共享与转储。

Circuit principles, analogue circuit, digit circuit which laid me a solid foundation of circuit for the study of communication; the study of electronic circuit of communication provided me with the working principles of analog communication system; the study on communication theory made me grasp the working methods of digital communication; the study on electromagnetic field, electromagnetic wave and aerial let me know that how signals travel through signal paths and how to apply signal and linear system, random signal and system to the research of noise's impact on signals

学习了电路原理、模拟电路、数字电路打下了学习通信的电路基础；学习了通信电子线路掌握了模拟通信系统的工作原理；学习了通信原理掌握了数字通信的工作方法；学习了电磁场与电磁波、微波与天线了解了信号如何在信道中传输；学习了信号与线性系统和随机信号与系统来研究噪声对信号的影响。

A three dimensional stereo sound reproducing apparatus for a mobile communication terminal comprises: a memory for storing sound data having a three dimensional stereo sound effect; a sound processing unit for reading the sound data from the memory when an incoming call is generated or when a user requests reproduction of the sound data and for decoding the sound data without distortion of the three dimensional stereo sound effect, thereby outputting the sound data as a type of an analog signal; and a speaker for amplifying the analog signal and outputting the amplified analog signal as a type of an audible sound.

该移动通信终端的三维立体声再现设备包括：用于存储具有三维立体声效果的声音数据的存储器；当生成呼入呼叫时或当用户请求再现声音数据时，用于从存储器中读出该声音数据并解码该声音数据而不会使三维立体声效果失真，由此以模拟信号的形式输出该声音数据的声音处理单元；和用于放大该模拟信号并输出该放大的模拟信号的扬声器。

In response to signals and system simulation studies, MATLAB also demonstrated its strong role, with MATLAB simulation for the time signal convolution, discrete, continuous LIT system of time-domain analysis, synthesis and periodic signal of decomposition, the bi-frequency system Domain analysis, signal modulation and demodulation, discrete systems, the Z-domain analysis.

在信号与系统仿真响应的研究中，MATLAB也体现其强大的作用，用MATLAB仿真连续时间信号的卷积计算，离散、连续LIT系统的时域分析、周期信号的合成与分解、系统的复频域分析、信号的调制与解调，还有离散系统的Z域分析。

The physical quantity to be measured is transformed into corresponding optical signal by light path. Then the optical signal is transformed into discrete voltage signal by a series of hardware circuit and software processing.

光路将待测物理量转化成相应的光信号，再经过硬件电路和软件的一系列处理转换成离散的电压信号，并在计算机上以图形方式显示结果。

The second one is a method based on Independent Component Analysis with reference signal. Unlike the former, this method can separate the estimating value of the watermark signal separately by using the information provided by the reference signal, so the computing complexity of the first method can be greatly decreased, at the same time, the shortcomings of the ICA based method, such as disorderliness and randomicity can be overcome.

第二种方法以带参考信号的独立分量分析算法为基础，通过参考信号提供的信息直接提取所需要的水印信号估计值，克服了ICA算法在分离各路源信号时所具有的无序性和任意性的缺点，降低了第一种方法的运算复杂度。

The signal peptides of chicken Igλ light chain and murine plasmingen were fused to the GFP N terminus using site-directed mutagenesis to construct the vectors with signal sequence, pEGFP-SPc and pEGFP-SPm. The chicken Igλ gene was inserted into the two vectors with signal sequence after double enzyme cutting.

分别将鸡Igλ轻链信号肽、小鼠纤溶酶原信号肽与pEGFP-C1载体的绿色荧光蛋白N端融合，产生带有信号肽的中间载体pEGFP-SPc和pEGFP-SPm。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。