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Overlap kernel pulse separation method

A technology of nuclear pulses and pulses, applied in the field of overlapping nuclear pulse decomposition, can solve problems such as difficulty in accurately extracting relevant information, achieve the effect of improving accuracy and credibility, and reducing abandonment rate

Inactive Publication Date: 2016-10-05
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

To a certain extent, this method solves the technical problem that it is difficult to accurately extract relevant information due to the overlapping of adjacent nuclear pulses, which is of great significance for improving the accuracy of radioactivity measurement.

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Embodiment Construction

[0025] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and processes are provided, but the protection scope of the present invention is not limited to the following implementations example.

[0026] Assuming that the overlapping nuclear pulse to be decomposed obtained in the radioactivity measurement is V(t), the method for decomposing the overlapping nuclear pulse is carried out according to the following specific steps ①~④.

[0027] Step ① Discretize the original overlapping nuclear pulse V(t) obtained in the radioactivity measurement to be decomposed and express it as a linear sum of N nuclear pulses:

[0028] For exponentially overlapping nuclear pulses

[0029] V ( kT s ) ...

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Abstract

The invention discloses an overlap kernel pulse separation method, which comprises the following steps: firstly, expressing an original overlap kernel pulse to be separated, which is obtained in radiometry, as the linear sum of N nuclear pulses; then, taking the parameter composition of the N nuclear pulses as a chromosome; and finally, taking the error of the overlap kernel pulse represented by an individual and the original overlap kernel pulse as a target function, adopting the selection, cross and mutation operators of a genetic algorithm, and obtaining an optimal individual after a multi-generation operation so as to obtain the parameter value of each pulse, i.e. realizing the separation of the overlap kernel pulse. When N takes different values, the overlap kernel pulse is subjected to the same separation to obtain new optimal individuals, and the optimal individual with a minimum target function value is selected from the optimal individuals to serve as a final solution. A result indicates that the overlap kernel pulse separation method based on a population searching technology is an optimal combination for searching the kernel pulse from the global meaning to realize the separation of the overlap kernel pulse so as to obtain the parameter of each kernel pulse.

Description

technical field [0001] The invention relates to a method for decomposing overlapping nuclear pulses. Background technique [0002] Acquisition and processing of nuclear pulse signals are important steps in radioactivity measurement. With the development of high-speed integrated circuits, digital shaping technology has become an important method of nuclear pulse signal processing, which greatly improves the performance of nuclear instruments. In fact, the overlapping of adjacent nuclear pulses is inevitable, especially in high-speed counting, which is still a problem that is difficult to identify and decompose for the current waveform shaping technology. In recent years, more in-depth research has been carried out on the acquisition, identification, and decomposition of nuclear pulses at home and abroad. These methods often use the method of discarding overlapping pulses. In addition, due to fluctuations in the response characteristics of the detector and its subsequent cir...

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Application Information

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IPC IPC(8): G06N3/12
Inventor 黄洪全闫萍方方
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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