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A Fair and Trusted Trading Scheme for Medical Data Based on Smart Contracts

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Computers, Materials & Continua 2024年第2期78卷 1843-1859页

作者： xiaohui yang Kun Zhang School of Cyber Security and Computer Hebei UniversityBaoding071000China

Data is regarded as a valuable asset,and sharing data is a prerequisite for fully exploiting the value of ***,the current medical data sharing scheme lacks a fair incentive mechanism,and the authenticity of data cannot be guaranteed,resulting in low enthusiasm of participants.A fair and trusted medical data trading scheme based on smart contracts is proposed,which aims to encourage participants to be honest and improve their enthusiasm for *** scheme uses zero-knowledge range proof for trusted verification,verifies the authenticity of the patient’s data and the specific attributes of the data before the transaction,and realizes privacy *** the same time,the game pricing strategy selects the best revenue strategy for all parties involved and realizes the fairness and incentive of the transaction *** smart contract is used to complete the verification and game bargaining process,and the blockchain is used as a distributed ledger to record the medical data transaction process to prevent data tampering and transaction ***,by deploying smart contracts on the Ethereum test network and conducting experiments and theoretical calculations,it is proved that the transaction scheme achieves trusted verification and fair bargaining while ensuring privacy protection in a decentralized *** experimental results show that the model improves the credibility and fairness of medical data transactions,maximizes social benefits,encourages more patients and medical institutions to participate in the circulation of medical data,and more fully taps the potential value of medical data.

关键词： Blockchain data transactions zero-knowledge proof game pricing

Influence of Electric Current on Kirkendall Diffusion of Zn/Cu Couples

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Journal of Materials Science & Technology 2008年第3期24卷 410-414页

作者： Yingju LI Yuansheng yang xiaohui FENG Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

The influence of electric current on Kirkendall diffusion in Zn/Cu couples was investigated. Under the action of different electric currents, the Zn/Cu diffusion couples were annealed at 785℃ for different holding time. The experimental results show that the displacement of the Kirkendall plane increases with increasing holding time. However, the displacement of the Kirkendall plane with electric current is larger than that without electric current. The relationship between the displacement of the Kirkendall plane and the holding time is changed under the action of electric current. The likely reason for the electric current enhancing effect is the energy transfer from electron to jumping atom, increasing the integrated diffusion coefficient, which leads to the increase in the velocity of Kirkendall plane.

关键词： Electric current Electromigration Kirkendall effect Darken equations

A Computational Synthesis Approach of Mechanical Conceptual Design Based on Graph Theory and Polynomial Operation

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Chinese Journal of Mechanical Engineering 2020年第1期33卷 60-74页

作者： Lin Han Geng Liu xiaohui yang Bing Han Shaanxi Engineering Laboratory for Transmissions and Controls Northwestern Polytechnical UniversityXi’an 710072China

The design synthesis is the key issue in the mechanical conceptual design to generate the design candidates that meet the design *** paper devotes to propose a novel and computable synthesis approach of mechanisms based on graph theory and polynomial *** graph framework of the synthesis approach is built firstly,and it involves:(1)the kinematic function units extracted from mechanisms;(2)the kinematic link graph that transforms the synthesis problem from mechanical domain into graph domain;(3)two graph representations,i.e.,walk representation and path representation,of design candidates;(4)a weighted matrix theorem that transforms the synthesis process into polynomial ***,the formulas and algorithm to the polynomial operation are *** on them,the computational flowchart to the synthesis approach is summarized.A design example is used to validate and illustrate the synthesis approach in *** proposed synthesis approach is not only supportive to enumerate the design candidates to the conceptual design of a mechanical system exhaustively and automatically,but also helpful to make that enumeration process computable.

关键词： Design synthesis Conceptual design Graph theory Polynomial operation Kinematic link graph Weighted matrix theorem

True Amplitude Extraction Technology and Its Application in Pre-Stack Seismic Data

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Journal of Earth Science 2015年第4期26卷 522-529页

作者： xiaohui yang Siyuan Cao Dian Yuan CNPC Key Laboratory of Geophysical Prospecting China University of Petroleum

Common-reflection-point （CRP） gather is a bridge that connects seismic data and petro- physical parameters. Pre-stack attributes extraction and pre-stack inversion, both of them are impor- tant means of reservoir prediction. Quality of CRP gather usually has great impact on the accuracy of seismic exploration. Therefore, pre-stack CRP gathers noise suppression technology becomes a major research direction. Based on the vector decomposition principle, here we propose a method to suppress noise. This method estimates optimal unit vectors by searching in various directions and then sup- presses noise through vector angle smoothing and restriction. Model tests indicate that the proposed method can separate effective signal from noise very well and suppress random noise effectively in single wavenumber case. Application of our method to real data shows that the method can recover effective signal with good amplitude preserved from pre-stack noisy seismic data even in the case of low signal to noise ratio （SNR）.

关键词： vector decomposition noise suppression angle smooth spline function.

Elastoplastic Contact Mechanics Model of Rough Surface Based on Fractal Theory

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Chinese Journal of Mechanical Engineering 2017年第1期30卷 207-215页

作者： YUAN Yuan GAN Li LIU Kai yang xiaohui School of Mechanical and Precision Instrument Engineering Xi'an University of Technology School of Mechanical Engineering Xi'an Jiaotong University

Because the result of the MB fractal model contradicts with the classical contact mechanics, a revised elastoplastic contact model of a single asperity is developed based on fractal theory. The critical areas of a single asperity are scale dependent, with an increase in the contact load and contact area, a transition from elastic, elastoplastic to full plastic deformation takes place in this order. In considering the size distribution function, analytic expression between the total contact load and the real contact area on the contact surface is obtained. The elastic, elastoplastic and full plastic contact load are obtained by the critical elastic contact area of the biggest asperity and maximun contact area of a single asperity. The results show that a rough surface is firstly in elastic deformation. As the load increases, elastoplastic or full plastic deformation takes place. For constant characteristic length scale G, the slope of load-area relation is proportional to fractal dimension D. For constant fractal dimension D, the slope of load-area relation is inversely proportional to G. For constant D and G, the slope of load-area relation is inversely proportional to property of the material ~b, namely with the same load, the material of rough surface is softer, and the total contact area is larger. The contact mechanics model provides a foundation for study of the friction, wear and seal performance of rough surfaces.

关键词： rough surfaces asperities fractal theory contact model

Unlabeled data driven cost-sensitive inverse projection sparse representation-based classification with 1/2 regularization

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Science China(Information Sciences) 2022年第8期65卷 39-56页

作者： xiaohui yang Zheng WANG Jian SUN Zongben XU Henan Engineering Research Center for Artificial Intelligence Theory and Algorithms School of Mathematics and StatisticsHenan University National Engineering Laboratory for Big Data Analytics School of Mathematics and StatisticsXi'an Jiaotong University

Sparse representation-based classification(SRC) has been widely used because it just relies on simple linear regression ideas to do classification, and it does not need learning. However, the performance of SRC is limited by needing sufficient labeled samples per class and the sensitivity to class imbalance. For tackling these problems, an improved SRC model is constructed in this paper. For alleviating the problem of insufficient labeled samples, an unlabeled data-driven inverse projection sparse representation-based classification model is constructed to achieve effective and stable representation and recognition results. The L1/2 and S1/2 regularizations are introduced to capture the sparsity of 1-D and 2-D, and to make the model have good statistical properties. Moreover, the cost-sensitive strategy is integrated into the model’s classification criteria to improve the imbalance of class distribution adaptively, especially for multiclass imbalanced data.A solver utilizing the mixed Gauss-Seidel and Jacobian ADMM algorithm is developed to obtain the approximate solution. Experiments on common public test databases show that the proposed model achieves competitive results compared with the latest published results and some deep-learning algorithms.

关键词： unlabeled-data driven 1/2 regularization cost-sensitive inverse projection sparse representation-based classification

Cold plasma-activated Cu-Co catalysts with CN vacancies for enhancing CO_(2)electroreduction to low-carbon alcohol

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Journal of Energy Chemistry 2023年第10期85卷 108-115,I0005页

作者： Junyi Peng Qiang Zhang yang Zhou xiaohui yang Fang Guo Junqiang Xu College of Chemistry and Chemical Engineering Chongqing University of TechnologyChongqing 400054China College of Chemistry and Chemical Engineering Chongqing UniversityChongqing 400044China Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 4000714China

Electrocatalytic CO_(2)reduction reaction to low-carbon alcohol is a challenging task,especially high selectivity for ethanol,which is mainly limited by the regulation of reaction intermediates and subsequent C–C coupling.A Cu-Co bimetallic catalyst with CN vacancies is successfully developed by H_(2)cold plasma toward a high-efficiency CO_(2)RR into low-carbon *** Cu-Co PBA-V_(CN)(Prussian blue analogues with CN vacancies)electrocatalyst yields methanol and ethanol as major products with a total low-carbon alcohol FE of 83.8%(methanol:39.2%,ethanol:44.6%)at-0.9 V ***,excellent durability(100 h)and a small onset potential of-0.21 ***-SEIRAS(attenuated total internal reflection surface enhanced infrared absorption spectroscopy)and DFT(density functional theory)reveal that the steric hindrance of V_(CN)can enhance the CO generation from*COOH,and the C–C coupling can also be increased by CO spillover on uniformly dispersed Cu *** work provides a strategy for the design and preparation of electrocatalysts for CO_(2)RR into low-carbon alcohol products and highlights the impact of catalyst steric hindrance to catalytic performance.

关键词： Cold plasma CN vacancies Steric hindrance Bimetallic catalyst Low-carbon alcohol

Researching and implementation of reconfigurable Hash chip based on FPGA

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Journal of Systems Engineering and Electronics 2007年第1期18卷 183-187页

作者： yang xiaohui Dai Zibin Liu Yuanfeng Wang Ting Inst. of Electronic Technology the E L. A. Information Engineering Univ Zhengzhou 450004 ER. China

The reconfigurable cryptographic chip is an integrated circuit that is designed by means of the method of reconfigurable architecture, and is used for encryption and decryption. Many different cipher algorithms can be flexibly implemented with the aid of a reconfigurable cryptographic chip and can be used in many fields. This article takes an example for the SHA-1/224/256 algorithms, and then designs a reconfigurable cryptographic chip based on the thought and method of the reconfigurable architecture. Finally, this paper gives the implementation result based on the FPGA of the family of Stratix II of Altera Corporation, and presents a good research trend for resolving the storage in hardware implementation using FPGAs.

关键词： Reconfigurable cryptographic chip FPGA

CFCS:A Robust and Efficient Collaboration Framework for Automatic Modulation Recognition

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Journal of Communications and Information Networks 2023年第3期8卷 283-294页

作者： Jian Shi xiaohui yang Jia Ma Guangxue Yue Key Laboratory of Medical Electronics and Digital Health of Zhejiang Province Jiaxing 314001China School of Computer Engineering and Science Shanghai UniversityShanghai 200444China Research Center of Cyber Science and Technology Hangzhou Innovation InstituteBeihang UniversityHangzhou 311228China College of Information Science and Engineering Jiaxing UniversityJiaxing 314001China

Most of the existing automatic modulation recognition(AMR)studies focus on optimizing the network structure to improve performance,without fully considering cooperation among the basic networks to play their respective *** this paper,we propose a robust and efficient collaboration framework based on the combination scheme(CFCS).This scheme effectively explores the spatial and temporal characteristics of complex signals by associating the advantages of convolutional neural network(CNN)and long and short-term memory(LSTM)*** addition,the robustness of the CFCS is verified by transfer *** demonstrate that the recognition rate of CFCS for highorder modulation signals such as 64QAM,128QAM,and 256QAM is more than 90%at high signal-to-noise ratios(SNRs),and 24 modulation types are effectively ***,CFCS was transferred from RML2018.01a to RML2016.10b using transfer learning,which can still be deployed efficiently while reducing the training time by 20%.The CFCS has strong generalization ability and excellent recognition performance.

关键词： AMR CNN LSTM combination scheme transfer learning