1, a signal being put up the function value only in some discontinuous microtime , becomes straggling time signal. It can come from the analog signal sampling , be time and without exception discontinuous extent scattering signal or. During the period of scattering signal analysis and treatment , generally with arranging aggregation mounting discontinuous group of number in time according to certain precedence , being called progression. Different 2, two arrays can be corresponding identical Z varies, but the convergence region is not same as, therefore, for making the array and Z vary is one to one correspondence, must assign the person to restrain self's a region while giving array Z out alternation. The random signal can use the signal that accurate mathematics relational expression describes 3, its alteration obedience counts but a law , can use probability statistics to describe that coming characteristic property. The signal is called the sample book function face to face immediately according to precis writer made by time course. Random signal time domain and frequency region characteristic property can use statistical method to be in progress studying 4, whose amplitude characteristic property uses the signal mean value , mean square value and probability density function indicate that. Signal time domain characteristic property also can use self relevance function to describe that , frequency region characteristic property can use power spectrum density function to describe that.
又一个电子信息的孩子。。一句句翻译太麻烦了 给你key word吧，其他组织一下就好了离散时间 discrete time模拟信号 analog signal抽样 sampling幅度 magnitudeZ变换 z transform收敛域 the region of convergence随即信号 ramdon signal时域 time domain频域 frequency domain功率谱 power spectrum
be marked down greatly【金山词霸】Those products have been marked down greatly那些产品都已大幅度降价price plunge 价格跳水【Google】Consumer prices plunged last month at the steepest rate in 56 years because of sharp declines in oil and gasoline prices
Media reports have suggested that Beijing has softened its demands for a hefty price cut after failing to reach a deal with its major overseas suppliers.
1, The signal only in certain discrete functions are given the instantaneous value and become discrete-time signal. It can come from a sample of the analog signal, or the rate of time and not in a row of discrete signals. In the discrete signals analysis and processing , Usually by a certain order in time in a row is not a group of several collections, called the series. 2, two different sequences can be the same as the corresponding Z transform, and the convergence of different domains, in order to make the series and Z-one mapping is a transformation in the transformation of the Z series is given at the same time, we must specify the convergence domain. 3, random signal is not precise mathematical description of the relationship between the type of signal, but it's subject to change in the law of statistics, probability and statistics can be used to describe characteristics. Immediately to the signal time course of doing all the long record of the observation function as the sample. 4, random signals in the time domain and frequency domain characteristics can be used statistical methods to study, the amplitude of the signal characteristics of the mean, mean square value and probability density function. The time-domain signal characteristics can also be used to describe auto-correlation function, the frequency characteristics can be used to describe the power spectral density function.
小喵酱碎碎念
