共查询到19条相似文献,搜索用时 468 毫秒
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通过对随机误差分布规律的理论分析,利用数理统计和数值计算方法,得到了置信区间与置信概率的函数关系,给出了实用的计算数据。 相似文献
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两种多光谱高温计无源温区标定方法,即依据图形相似性原理的标定方法和依据高温计传递函数的标定方法。为验证两种方法的实用性,通过对黑体辐射出度加入不同大小的随机误差模拟不同测量精度的多光谱高温测量系统,对这两种方法的抗干扰能力进行了研究。实验结果证明,依据图形相似原理的标定方法具有强抗随机误差能力,适用于随机误差较大的测量系统。当随机误差很小时,其精度低于依据传递函数的标定方法,但当随机误差增加到一定范围,其精度远高于后者。基于高温计传递函数的标定方法虽在一定的随机误差范围内具有高的外推标定精度,但抗随机误差能力较弱,适用于随机误差小的测量系统。 相似文献
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The statistical distribution of natural phenomena is of great significance in studying the laws of nature. In order to study the statistical characteristics of a random pulse signal, a random process model is proposed theoretically for better studying of the random law of measured results. Moreover, a simple random pulse signal generation and testing system is designed for studying the counting distributions of three typical objects including particles suspended in the air, standard particles, and background noise. Both normal and lognormal distribution fittings are used for analyzing the experimental results and testified by chi-square distribution fit test and correlation coefficient for comparison. In addition, the statistical laws of three typical objects and the relations between them are discussed in detail. The relation is also the non-integral dimension fractal relation of statistical distributions of different random laser scattering pulse signal groups. 相似文献
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B. H. Lavenda 《International Journal of Theoretical Physics》1988,27(11):1371-1381
Quantum statistical laws are derived from bona fide stationary probability distributions of physical stochastic processes. These distributions are shown to be the laws of error for which the average occupation numbers are the most probable values. They determine uniquely the statistical entropy functions and the second law gives the quantum statistical distributions. 相似文献
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回归分析法是对一定的测量数据,寻找出隐藏在随机性中的统计规律性.在考虑滑块和导轨之间空气黏性阻力的情况下,利用二元线性回归分析法直接验证牛顿第二定律,改进了牛顿第二定律的传统实验验证方法.结果表明,在实验误差允许的范围内牛顿第二定律均能得到较好地直接验证. 相似文献
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We continue our study of the exponential law for occurrences and returns of patterns in the context of Gibbsian random fields.
For the low-temperature plus-phase of the Ising model, we prove exponential laws with error bounds for occurrence, return,
waiting and matching times. Moreover we obtain a Poisson law for the number of occurrences of large cylindrical events and
a Gumbel law for the maximal overlap between two independent copies. As a by-product, we derive precise fluctuation results
for the logarithm of waiting and return times. The main technical tool we use, in order to control mixing, is disagreement
percolation 相似文献
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Uncertainty estimates in atomic meanlife measurements are usually obtained by statistical inference based on the hypothesis that the exponential decay law is exact and the distribution of random errors about it is Gaussian. At some level of precision these parameter evaluation methods must be accompanied by additional hypothesis testing. Possible limitations on these accuracies are examined in the light of recent measurements and calculations, and are quantitatively studied through the simulation and fitting of several alternative models. 相似文献
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It was recently noticed that high-energy scattering processes in QCD have a stochastic nature. An event-by-event scattering amplitude is characterised by a saturation scale which is a random variable. The statistical ensemble of saturation scales formed with all the events is distributed according to a probability law whose cumulants have been recently computed. In this work, we obtain the probability distribution from the cumulants. We prove that it can be considered as Gaussian over a large domain that we specify and our results are confirmed by numerical simulations. 相似文献
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《Waves in Random and Complex Media》2013,23(3):396-418
In the framework of the small perturbation method, we present a new theoretical derivation of the statistical and spatial properties of a field scattered by a one-dimensional slightly rough random surface. The work concerns the intermediate field zone where the scattered field is reduced to the contribution of the progressive plane waves. The surface is assumed to be stationary, ergodic and Gaussian. First, from a statistical point of view, we demonstrate that under oblique incidence the scattered field is not stationary while it is strictly stationary under normal incidence. For an infinite surface, the scattered field modulus obeys to Hoyt law and the phase is not uniform. Second, from a spatial point of view, for a given altitude and under all incidences, we show that the scattered field is ergodic. Under oblique incidence, the phase is spatially uniform and the modulus is given by a Rayleigh law. Under normal incidence, the phase is not uniform and the modulus is given by a Hoyt law. Third, from a practical point of view, we show that the field measured by a directional antenna is ergodic and stationary if the angular transfer function of the antenna does not contain the specular direction. 相似文献
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In this paper, for a multi-variate random process of arbitrary distribution type which can be considered to be a sum of two different random processes as a result of the natural internal mechanism of the fluctuation, or of an artificial analytical classification of the fluctuation, a unified statistical treatment for the multi-variate joint probability distribution and the multi-variate joint moment with arbitrary order of the resultant random process is introduced exactly in the form of finite expansion terms. The validity of the present theory has been experimentally confirmed not only by means of digital simulation but also by Hiroshima City street noise data. The experimental results clearly show the usefulness of the theory, and also the importance of the exact correction to the truncation error of the expansion expression. 相似文献
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We compare two recent phenomenological models of dephasing using a double barrier and a quantum ring geometry. While the stochastic absorption model generates controlled dephasing leading to Ohm's law for large dephasing strengths, a Gaussian random phase based statistical model shows many inconsistencies. 相似文献