首先，为了去除测量产生的噪声和误差，引入高斯核函数为每个采样点加权；
To filter out the noise and error arising out of various physical measurement processes and limitations of the acquisition technology, a Gaussian weight is assigned to each point acquired.
由于系统方程是时变的，在测量过程中，系统噪声和观测噪声的统计特性等很难精确地估计或测定，事实上很多误差模型都不能简单的设为白噪声。
Because the system equation is changed with time, during the measurement, the statistic character of the system noise and the observation noise cannot be estimated or be determined accurately.
依据声级测量的误差分析，结合实例，对国家现行《超标环境噪声排污费征收标准》提出异议。
According to error analysis of sound level measurement and practical case some objection was raised to levy standard on Noise Exceeding Environment standard.
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