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检索条件"机构=Shaanxi Provincial Key Laboratory of Network Computing and Security Technology"

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Channel Capacity Analysis for Diffusive Molecular Communication with a Partly Covered Comprehensive Reactive Receiver

Channel Capacity Analysis for Diffusive Molecular Communicat...

引用

2022 International Conference on networking and network Applications, NaNA 2022

作者： Zhu, Junning Liao, Xuening Wu, Zhenqiang Key Laboratory of Modern Teaching Technology Ministry of Education Xi’an China School of Computer Science Shaanxi Normal University Xi’an China Shaanxi Key Laboratory for Network Computing and Security Shaanxi Xi’an710048 China

ISBN: (数字)9781665461313

ISBN: (纸本)9781665461313

Molecular communication (MC) is a technology that utilizes microscopic particles such as molecules to communicate at the microscopic scale in living organisms. The nanomachine receiver as a critical part of MC has been extensively investigated. However, existing analyses of nanomachine receivers rarely consider the effects of various chemical reactions. In the few papers that considered the effect of chemical reaction on the channel, the effect of receptor coverage on the receiver surface was also not considered. To fill this gap, this paper studies the variation of channel capacity with coverage rate when the surface of the nanomachine receiver is partially covered with the receptors. This paper derived numerical results of channel capacity under the scenarios above and carried out the numerical simulations. The simulation results show that the channel capacity increases with the increase of coverage, which can guide the design of high-performance nanomachines. © 2022 IEEE.

关键词： Reaction rates

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A Trusted Privacy-Preserving Model for Cross-Chain Transactions Based on zk_SNARKs

A Trusted Privacy-Preserving Model for Cross-Chain Transacti...

引用

2023 International Conference on networking and network Applications, NaNA 2023

作者： Wang, Yichuan Tie, Jianhuan Hei, Xinhong Zhao, Li Zhang, Xiaohui School of Computer Science and Engineering Xi'an University of Technology Xi'an China Shaanxi Key Laboratory for Network Computing and Security Technolog Xi'an China

ISBN: (纸本)9798350327380

Currently, the privacy protection technology of blockchain is not mature enough, such as user data leakage and lack of anonymity exist, and these problems are especially serious when conducting cross-chain transactions. In this paper, we propose a method of cross-chain transactions based on zk_SNARKs in a trusted environment for cross-chain transactions for privacy protection. Cross-chain transactions are performed through the features of zk_SNARKs such as efficiency, privacy, and verifiability. zk_SNARKs needs to generate trusted settings with the help of a third party during the transaction, and the process has serious privacy issues, and the private parameters generated during the transaction may be maliciously attacked and thus obtained by attackers. To address this problem, we use a hardware technology SGX for trusted computing to encrypt and store some private parameters generated by zk_SNARKs, thus ensuring the security of cross-chain transactions. The experimental results show that the privacy protection scheme using SGX for cross-chain transactions takes less time than the traditional transaction privacy protection, with a verification time of 1.2s for a number of 10 sidechains, and is more efficient than the traditional cross-chain transaction privacy protection. © 2023 IEEE.

关键词： Blockchain

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Wishart Deeplab network for Polarimetric SAR Image Classification 3rd

Wishart Deeplab Network for Polarimetric SAR Image Classific...

引用

3rd China Intelligent Robotics Annual Conference, CCF CIRAC 2022

作者： Shi, Junfei He, Tiansheng Jin, Haiyan Wang, Hua Xu, Weinan State Key Laboratory of Geo-Information Engineering Shaanxi Xi’an710048 China School of Computer Science and Engineering Xi’an University of Technology Shaanxi Xi’an710048 China Shaanxi Key Laboratory for Network Computing and Security Technology Shaanxi Xi’an710048 China

ISBN: (纸本)9789819903009

Polarimetric Synthetic Aperture Radar (PolSAR) images have attracted much attention with abundant polarimetric scattering information. In recent years, many deep learning models have been proposed and highly expanded to PolSAR image classification. However, how to learn the complex matrix information is an indispensable problem. To address this problem, a Wishart Deeplab network is developed, which can not only learn the polarimetric matrix structure by designing Wishart network level but also learn multi-scale polarimetric scattering features by incorporating dilated convolution. Specifically, the Wishart-Deeplab based PolSAR classification model is constructed by designing the Wishart convolution operation to learn the statistical information of PolSAR data. Then, a deeplabV3 + network is followed to obtain the multi-scale semantic features by dilated convolution. By this way, statistical distrubtion-based and high-level semantic features are adaptively learned to improve the performance of the network. The experiments are conducted on two sets of real PolSAR data and results show that this method can obtain better classification results. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Image classification

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Cross Elitist Learning Multifactorial Evolutionary Algorithm 1

引用

3rd International Conference on Neural computing for Advanced Applications, NCAA 2022

作者： Li, Wei Luo, Haonan Wang, Lei School of Computer Science and Engineering Xi’an University of Technology Xi’an710048 China Shaanxi Key Laboratory for Network Computing and Security Technology Xi’an710048 China

ISBN: (数字)9789811961427

ISBN: (纸本)9789811961410

Multifactorial Evolutionary Algorithm (MFEA) is a popular optimization algorithm in recent years. It has implicit parallelism and can solve different problems at the same time in the same search space. However, premature convergence is a significant shortcoming of MFEA. The main reason for this phenomenon is the lack of population diversity and the inability to migrate effectively between tasks. To address this shortcoming, this paper proposes a cross elitist learning multifactorial evolutionary algorithm (CEL-MFEA). Firstly, the cross elitist strategy guides the individuals to learn from the elite individual, which can improve the convergence of the proposed CEL-MFEA. Secondly, the Nelder-Mead algorithm is used to provide an effective knowledge transfer between different tasks. Finally, the opposition learning mechanism is employed to ensure population diversity. The comprehensive ability of the proposed CEL-MFEA is evaluated by 9 classical multifactorial optimization problem test sets. Experimental results show that the CEL-MFEA is more competitive than MFEA algorithm and several popular multifactorial optimization algorithms. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Evolutionary algorithms

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Signature Scheme Based on The SM2 Algorithm in Fabric

Signature Scheme Based on The SM2 Algorithm in Fabric

引用

2021 International Conference on networking and network Applications, NaNA 2021

作者： Zhang, Yaling Wang, Hongyun Wang, Yichuan Ji, Wenjiang Zhu, Lei Xi'an University of technology School of computer science and engineering Xi'an China Shaanxi Key Laboratory for Network Computing and Security Technology Xi'an University of technology Xi'an China

ISBN: (纸本)9781665441582

Based on the analysis and research of the widely used Hyperledger Fabric alliance chain structure, this paper proposes a digital signature scheme based on the national cryptographic algorithm SM2 which can be applied to Hyperledger Fabric. Firstly, two elliptic curve public-key cryptography algorithms are analyzed, and the feasibility of the SM2 in Fabric system is studied. Secondly, the Fabric system using the SM2 algorithm is designed and implemented, and the generation process of the Fabric chain address using the SM2 algorithm is given. Finally, experimental verification of the availability and performance of the Fabric system after the replacement of national cryptography algorithms is carried out. The experimental results show that the SM2 interface of the new Fabric alliance chain has good usability, and the average latency is reduced by 51.8%, and the transaction throughput is increased by 33.1%. © 2021 IEEE.

关键词： Blockchain

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Covariance Matrix Adaptation Evolutionary Algorithm for Multi-task Optimization 15th

Covariance Matrix Adaptation Evolutionary Algorithm for Mult...

引用

15th International Conference on Bio-Inspired computing: Theories and Applications, BIC-TA 2020

作者： Li, Wei Lei, Zhou Yuan, Junqing Luo, Haonan Jiang, Qiaoyong Li, Jinbo School of Computer Science and Engineering Xi’an University of Technology Xi’an710048 China Shaanxi Key Laboratory for Network Computing and Security Technology Xi’an710048 China

ISBN: (纸本)9789811613531

Multifactorial evolution is a relatively new evolutionary multitasking paradigm which aims to solve multiple optimization problems simultaneously. In order to make a further contribution to multifactorial optimization, this paper introduced a covariance matrix adaptation evolutionary strategy to explore the generality of the multitasking paradigm. A novel encoding and decoding method is employed so that each component problem is solved by a unique population. Further, a mating approach is proposed to transfer implicit knowledge among tasks for generating offspring. Experimental and statistical analyses are performed on CEC2017 evolutionary multitask optimization competition. Results show that the proposed algorithm has a superior performance in comparison with other state-of-the-art multifactorial optimization algorithms. © 2021, Springer Nature Singapore Pte Ltd.

关键词： Multitasking

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An Improved Cloud Particles Optimizer for Function Optimization 1

引用

2nd International Conference on Neural computing for Advanced Applications, NCAA 2021

作者： Li, Wei Luo, Haonan Yuan, Junqing Lei, Zhou Wang, Lei School of Computer Science and Engineering Xi’an University of Technology Xi’an710048 China Shaanxi Key Laboratory for Network Computing and Security Technology Xi’an710048 China

ISBN: (数字)9789811651885

ISBN: (纸本)9789811651878

Evolutionary algorithm is a popular and effective method in optimization field. As one of the optimization algorithms, cloud particles optimizer (CPEA) has shown to be effective in solving problems with different characteristics. However, due to the powerful local search ability, premature convergence is a significant disadvantage of CPEA optimizer. To alleviate this problem, an improved cloud particles optimizer named ICPEA is proposed. In ICPEA, the fluid operation is designed to explore the evolution direction, while the solid operation is employed to improve the exploitation efficiency. Moreover, the dynamical selection strategies of control parameters are employed to cope with premature convergence issues. In order to demonstrate the effectiveness of ICPEA, CEC2014 test suites are used for simulating. The experimental results affirm that ICPEA is a competitive optimizer compared to CPEA algorithm and several state-of-the-art optimizers. © 2021, Springer Nature Singapore Pte Ltd.

关键词： Global optimization

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Species-Based Differential Evolution with Migration for Multimodal Optimization 14th

Species-Based Differential Evolution with Migration for Mult...

引用

14th International Conference on Bio-inspired computing: Theories and Applications, BIC-TA 2019

作者： Li, Wei Fan, Yaochi Jiang, Qiaoyong School of Computer Science and Engineering Xi’an University of Technology Xi’an710048 China Shaanxi Key Laboratory for Network Computing and Security Technology Xi’an710048 China

ISBN: (纸本)9789811534249

Due to the fact that many realistic problems are multimodal optimization problems (MMOPs), multimodal optimization has attracted a growing interest. In this paper, a Species-based differential evolution with migration algorithm is proposed for MMOPs. First, a migration strategy is developed to improve the exploration ability of species with less individuals. Then, an improved operation of creating local individuals is introduced to help the algorithm to find high-quality solutions. Finally, an archive mechanism is applied to preserve the best solutions found during previous generations and avoid the loss of the peaks. Experimental results on CEC2013 test problems confirm the effectiveness of the proposed algorithm compared to several well-known multimodal optimization algorithms. © 2020, Springer Nature Singapore Pte Ltd.

关键词： Optimization

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Enhanced Velocity-Driven Particle Swarm Optimization for Evolving Artificial Neural network 2021

Enhanced Velocity-Driven Particle Swarm Optimization for Evo...

引用

7th International Conference on computing and Artificial Intelligence, ICCAI 2021

作者： Li, Wei Luo, Haonan Lei, Zhou Yuan, Junqing Dong, Wangshun Wang, Lei School of Computer Science and Engineering Xi'an University of Technology Xi'an710048 China Shaanxi Key Laboratory for Network Computing and Security Technology Xi'an710048 China

ISBN: (纸本)9781450389501

Neural network has been considered as an effective tool for predicting chaotic time series and approximating functions. However, traditional methods for training neural networks have some shortcomings, such as slow convergence speed, easy to fall into local optimum and so on. To obtain an efficient performance, an enhanced velocity-driven particle swarm optimization, called EVDPSO, is proposed in this paper. The proposed algorithm introduces an adaptive method for the parameter f used in the velocity-driven mechanism, which helps to achieve an effective trade-off between exploration and exploitation. To verify the effectiveness of the proposed algorithm, the algorithm is employed as a new optimize method to train artificial neural networks for nonlinear function approximation problems and chaotic time series prediction. The experimental results demonstrate the effectiveness of the proposed algorithm over other traditional optimization algorithms. © 2021 ACM.

关键词： Neural networks

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A geometric image segmentation method based on a bi-convex, fuzzy, variational principle with teaching-learning optimization

A geometric image segmentation method based on a bi-convex, ...

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作者： Jin, Haiyan Li, Yaning Xing, Bei Wang, Lei Department of Computer Science and Engineering Xi'An University of Technology No. 5 South Jinhua Road Xi'an Shaanxi710048 China Shaanxi Key Laboratory for Network Computing and Security Technology Xi'an China

This paper proposes an efficient, bi-convex, fuzzy, variational (BFV) method with teaching and learning based optimization (TLBO) for geometric image segmentation. Firstly, we adopt a bi-convex, object function to process a geometric image. Then, we introduce TLBO to maximally optimize the length-penalty item, which will be changed under the teaching phase and the learner phase of the TLBO. This makes the length penalty item closer to the target boundary. Therefore, the length-penalty item can be automatically adjusted according to the fitness function, namely the evaluation standards of the image quality. At last, we combine the length-penalty item with the numerical remedy mechanism to achieve better results. Compared with existing methods, simulations show that our method is more effective. © 2016 - IOS Press and the authors. All rights reserved.

关键词： Image segmentation

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