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Copyright of China Tropical Medicine is the property of China Tropical Medicine Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Computer Engineering & Applications is the property of Beijing Journal of Computer Engineering & Applications Journal Co Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Aiming at the problems that the existing delay estimation algorithms have low accuracy and large delay estimation errors at low signal-to-noise ratios, an exponential quadratic correlation generalized cross correlation-phrase transform-β(GCC-PHAT-β) algorithm was proposed. By constructing two single-frequency sine wave signals with Gaussian white noise, the GCC-PHAT-β algorithm, the quadratic correlation GCC-PHAT-β algorithm and the improved algorithm were simulated under different signal to noise ratio (SNR), respectively. The algorithm and the improved algorithm were simulated to verify the peak bulge degree of the three algorithms under different SNR. The male voice audio was further selected as the signal source, and the errors generated by the three algorithms in the time delay estimation were compared. The real results show that when the SNR is -10 ~10 dB, the maximum peak value of the correlation function of the improved algorithm is obviously higher than that of the GCC-PHAT-β algorithm and the quadratic correlation GCC-PHAT-β algorithm. It is also significantly reduced for the other two algorithms. It can be seen that the quadratic correlation GCCPHAT- β algorithm in exponential form has certain advantages when the SNR is -10 ~10 dB. [ABSTRACT FROM AUTHOR]

In order to improve the effect of gear fault detection and defect detection, and effectively remove the mixed noise in the image, an edge detection algorithm of noisy gear image combined with image enhancement was proposed. First, the information entropy was introduced to improve the Mahala Nobis distance formula, and the Mahala Nobis distance was used to improve the adaptive median filter. Then the pow er transform was improved to make it adaptive, and the improved power transform was used to improve the Retinex algorithm to enhance the overall image. Finally, the wavelet modulus maximum method was used to detect the edge of the noisy gear image. The research results show that the objective evaluation indexes PSNR, SNR and SSIM of this algorithm are higher than the objective evaluation indexes of median filter and adaptive median filter for mixed noise, and the denoising effect is significantly improved. At the same time, combining with the improved Retinex algorithm, the enhanced brightness and contrast of the overall noisy gear image are increased, and part of the noise is suppressed, making the edge detection effect of noisy gear image better. [ABSTRACT FROM AUTHOR]

Copyright of Piezoelectrics & Acoustooptics is the property of Piezoelectric & Acoustooptic and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Systems Engineering & Electronics is the property of Journal of Systems Engineering & Electronics Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Fuzhou University is the property of Journal of Fuzhou University, Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Natural Resources / Ziran Ziyuan Xuebao is the property of Journal of Natural Resources and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Piezoelectrics & Acoustooptics is the property of Piezoelectric & Acoustooptic and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Application Research of Computers / Jisuanji Yingyong Yanjiu is the property of Application Research of Computers Edition and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Functional Materials / Gongneng Cailiao is the property of Chongqing Functional Materials Periodical Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper deals with the problem arising from a supply chain with a single supplier and multiple retailers which do joint replenishment by using EOQ model. The aim of this paper is to investigate a joint replenishment interval-valued EOQ model without shortage among the retailers whose demands are intervals, the obtained retailers' order quantities and the coalitions' inventory costs are intervals as well. In order to allocate the interval-valued inventory costs, we propose an interval-valued proportional surplus division for a special subclass of interval-valued inventory cost allocation cooperative games. By adding the coalition size monotonicity-like conditions, a simplified and an effective method is developed to obtain the lower and upper bounds of the proposed interval-valued proportional surplus division via utilizing the lower and upper bounds of the interval-valued inventory costs of coalitions, respectively. The applicability and effectiveness of the proposed method are demonstrated with a real numerical example. This paper may provide theory and method support for solving complex inventory cost allocation problems. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Engineering Geology / Gongcheng Dizhi Xuebao is the property of Journal of Engineering Geology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Chongqing University of Posts & Telecommunications (Natural Science Edition) is the property of Chongqing University of Posts & Telecommunications and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

As an alliance form for players, a level structure is more general than a coalition structure. This paper devotes to propose the multi-step Shapley value of transferable utility cooperative games with a level structure. Concretely, an allocation procedure and an axiomatic characterization of it are given. Additionally, as an equivalent allocation procedure, this paper proves that it is identical with the weighted Shapley value of an appropriate transferable utility cooperative game. Research results extend the twostep Shapley value of transferable utility cooperative games with a coalition structure, and they can be taken as references to investigate other solutions of transferable utility cooperative games with an alliance restriction. [ABSTRACT FROM AUTHOR]

Copyright of Computer Engineering & Science / Jisuanji Gongcheng yu Kexue is the property of Computer Engineering & Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)