A negative selection algorithm generates detectors to realize abnormality detection by simulating the maturation process of T cells in human immunity. Holes are areas of feature space that cannot be covered by the det...
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A negative selection algorithm generates detectors to realize abnormality detection by simulating the maturation process of T cells in human immunity. Holes are areas of feature space that cannot be covered by the detector set and are the major factor in the degradation of algorithm performance. Conventional methods alleviate the hole problem by minimizing the coverage area of the holes. In this study, we approach the issue from a different angle. Holes are prone to form in the boundary area between the self and nonself regions, and when the self and the nonself cross or overlap, the hole problem becomes more serious. The k-nearest neighbors (k-NN) algorithm is more suitable than other methods for pending instance sets where the class domain crosses or overlaps more. Therefore, we propose a hybrid real-valued negative selection algorithm with variable-sized detectors (V-Detector) and the k-NN algorithm, abbreviated as V-Detector-kNN. The V-Detector-kNN hybrid algorithm first uses the V-Detector algorithm to classify, and then, for the problem that the nonself instances in the holes are misclassified as selfs, k-NN is introduced to classify those misclassified instances to improve the detection rate. Theoretical analysis proves that the V-Detector-kNN algorithm that we proposed has a higher detection rate than the V-Detector algorithm in most cases. Comparative experiments with 5 different algorithms on 9 UCI datasets show that our proposed algorithm ranks first in detection rate. (C) 2021 Elsevier B.V. All rights reserved.
Concerned with the problem of lacking fault samples of complex equipments, it studies the principle and application of negative selection algorithm of artificial immune system. The detectors generation mechanism of re...
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Concerned with the problem of lacking fault samples of complex equipments, it studies the principle and application of negative selection algorithm of artificial immune system. The detectors generation mechanism of real-valued negative selection algorithm is introduced. Intuitively, to maximize the covering produced by a set of detectors, it is necessary to reduce their overlapping and not covering the self set. This paper presents an optimization strategy base on re-heating simulated annealing algorithm to modify the position of detectors, not changing their number. This method can improve the covering effect of non-self space. The triangle training data are used to demonstrate the properties of optimized VRNS. Detection rate is improved and false alarming rate is decreased. It is used for fault detection in analog circuit; result demonstrates that the proposed algorithm is better than artificial neural network in fault detection of this circuit.
To overcome the limitations of traditional monitoring methods, based on vibration parameter image of rotating machinery, this paper presents an abnormality online monitoring method suitable for rotating machinery usin...
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To overcome the limitations of traditional monitoring methods, based on vibration parameter image of rotating machinery, this paper presents an abnormality online monitoring method suitable for rotating machinery using the negativeselection mechanism of biology immune system. This method uses techniques of biology clone and learning mechanism to improve the negative selection algorithm to generate detectors possessing different monitoring radius, covers the abnormality space effectively, and avoids such problems as the low efficiency of generating detectors, etc. The result of an example applying the presented monitoring method shows that this method can solve the difficulty of obtaining fault samples preferably and extract the turbine state character effectively, it also can detect abnormality by causing various fault of the turbine and obtain the degree of abnormality accurately. The exact monitoring precision of abnormality indicates that this method is feasible and has better on-line quality, accuracy and robustness.
Through the learning and research of the immune negative selection algorithm, after learning the traditional partial matching rules, namely Hamming matching and r-continuous bit matching, summarize its advantages and ...
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Through the learning and research of the immune negative selection algorithm, after learning the traditional partial matching rules, namely Hamming matching and r-continuous bit matching, summarize its advantages and improve its disadvantages to create an improved matching scheme to deal with immune negatives Select the generation of the detection set in the algorithm and the process of intrusion detection. At the same time, this paper also established an intrusion detection model based on the improved scheme and a traditional intrusion detection model, and compared the matching rate and false alarm rate (the probability of black holes) between the two models through simulation experiments. It is concluded that the matching rate and false alarm rate of the improved scheme are better than those of the traditional scheme.
The fault diagnosis of the pump-jack is as the background in the paper. A new negative selection algorithm is proposed combining the advantage of genetic algorithm and simulating annealing algorithm. The initial value...
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ISBN:
(纸本)9781424421138
The fault diagnosis of the pump-jack is as the background in the paper. A new negative selection algorithm is proposed combining the advantage of genetic algorithm and simulating annealing algorithm. The initial values of the detectors are initialized by genetic algorithm, thus the diversity of the detectors is retained, the scope of detecting is enlarged. The variable radius of detectors is introduced to cover non-self space efficiently. The redundancy of detectors is reduced and the efficiency is improved by using simulating annealing. The method is used to diagnosis the faults of the pump-jack. The results are better. Especially the method can diagnosis unknown faults. It has great potentiality.
This study presents a method of generating long-period pseudo-random sequence based on a plaintext and negative selection algorithm for real applications. It is a new method that extracts the generated factor from the...
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Traditional negative selection algorithms do not perform any differentiation for training self dataset and only use the mechanism of negative *** will generate excessive invalid detectors and have poor detection perfo...
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Traditional negative selection algorithms do not perform any differentiation for training self dataset and only use the mechanism of negative *** will generate excessive invalid detectors and have poor detection performance when the training selves contain noisy *** this paper,an outlier robust algorithm is *** new algorithm will divide the training selves into internal selves, boundary selves and outlier *** the same time,the information hiding in different kind of selves is fully utilized. Furthermore,by combining negativeselection mechanism with positive selection mechanism,the new algorithm can cover the non-self region more *** experiment results show that no matter the training self data is clean or not,the new algorithm can obtain better detection performance by using fewer detectors.
To overcome the obstacles existed in the fault detection and diagnosis of liquid rocket engine(LRE) such as the lack of real-time, in-time, and veracity, the negative selection algorithm of artificial immune system wa...
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To overcome the obstacles existed in the fault detection and diagnosis of liquid rocket engine(LRE) such as the lack of real-time, in-time, and veracity, the negative selection algorithm of artificial immune system was introduced. By constructing the artificial recognition ball(ARB) and adopting the maximum similarity rule, the fault detection and diagnosis were carried out. The experiment was performed with steady state data collected in ground test then. In the multi-dimensional modal space, the fault property was discussed further. Faults surround the normal state in different distance. If the parameters deflect more from the values which were supposed, the fault will be more obvious and it will move away from the normal state in the ARB. Some faults are separable, but some are also lapped over partly. Results show that this method has the function of quickly detection, high rate of correction diagnosis, and powerful ability of discovering the unknown fault. It can be widely applied in the state monitoring and fault diagnosis of LRE.
Inspired by human immune system, artificial immune system is widely applied to computational fields, especially to the field of anomaly detection. Antibody-antigen matching is the basis for recognitio
Inspired by human immune system, artificial immune system is widely applied to computational fields, especially to the field of anomaly detection. Antibody-antigen matching is the basis for recognitio
This paper presents a motor fault diagnosis method based on negative selection algorithm. It has the structure of two-level detectors, the first level detector detecting the presence of faults and the second level det...
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This paper presents a motor fault diagnosis method based on negative selection algorithm. It has the structure of two-level detectors, the first level detector detecting the presence of faults and the second level detector detecting the type of faults. Therefore the first level detectors are trained by using motor normal signals, and the second level detectors are trained by using several types of fault signals. During the process of detecting, only the test results of first level detectors are abnormal, the second level detectors are activated and implement fault detection to identify fault type. In this paper, normal vibration signals of motor bearing and three types of fault signals from American Case Western Reserve University bearing fault database are used to verify the fault diagnosis method. The experimental results show that the method can effectively detect early failure and can correctly identify the fault type.
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