检索结果-南通市图书馆

Transaction Frequency Based Trust for E-Commerce

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2023年第3期74卷 5319-5329页

作者： dong.huang.sean xu School of Applied Foreign Languages Zhejiang Yuexiu UniversityShaoxing312000China Anzina PTY Ltd. SydneyNSW2118Australia

Most traditional trust computing models in E-commerce do not take the transaction frequency among participating entities into consideration,which makes it easy for one party of the transaction to obtain a high trust value in a short time,and brings many disadvantages,uncertainties and even *** solve this problem,a transaction frequency based trust is proposed in this *** proposed method is composed of two *** first part is built on the classic Bayes analysis based trust modelswhich are ease of computing for the E-commerce *** second part is the transaction frequency module which can mitigate the potential insecurity caused by one participating entity gaining trust in a short *** show that the proposed method can effectively mitigate the self-promoting attacks so as to maintain the function of E-commerce system.

关键词： Transaction frequency trust Bayes analysis E-commerce

Isometries and Additive Mapping on the Unit Spheres of Normed Spaces

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2017年第10期33卷 1431-1442页

作者： Rui dong WANG xu Jian huang Science of College Tianjin University of Technology Tianjin 300384 P. R. China

In this paper, we investigate isometric extension problem in general normed space. We prove that an isometry between spheres can be extended to a linear isometry between the spaces if and only if the natural positive homogeneous extension is additive on spheres. Moreover, this conclusion still holds provided that the additivity holds on a restricted domain of spheres.

关键词： Isometric extension additive mapping unit sphere angle

TrinityMag:A novel magnetically actuated miniature robot manipulating system with a human-scale workspace

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2024年第11期67卷 3546-3558页

作者： LI dong CHEN BinHan huang ChenYang xu Sheng WU XinYu xu TianTian Guangdong Provincial Key Laboratory of Robotics and Intelligent System Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Key Laboratory of Biomedical Imaging Science and System Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

The development of the magnetic manipulating system is essential for applications of magnetically actuated miniature robots in biomedical practice,such as targeted therapy and precise ***,the workspaces of existing magnetic manipulating systems for miniature robots are mostly insufficient to manipulate miniature robots inside human *** present study proposes an innovative electromagnets-based manipulating system,TrinityMag,which can produce dynamic three-dimensional(3D)magnetic fields in a human-scale spherical workspace with a 2.6 m *** magnetic field of a single electromagnet is simulated,and a new calibration technic is designed based on deep learning ***,the arrangement of three electromagnets is optimized to produce maximal 3D arbitrary magnetic fields with limited ***,a target-tracking algorithm is developed so that the TrinityMag can track the miniature robot in real ***,the TrinityMag is validated in experiments to manipulate a soft millirobot to move in human-scale tortuous tracks with two types of *** maximum speed of the soft millirobot reaches 11.05 body length/*** work contributes to a significant increment in the workspace of the electromagnets-based manipulating system for miniature *** further expect that the TrinityMag could push the applications of miniature robots from laboratory to clinical practice.

关键词： magnetic manipulating system human-scale workspace magnetically actuated miniature robots

Low-resolution Kramers-Kronig detection system with error-feedback noise shaping

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第5期67卷 259-269页

作者： Xiangyong dong Zhenming YU Hongyu huang Kaixuan SUN Kun xu State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications

In this paper, we investigated the effects of error-feedback noise shaping(EFNS) on a lowresolution Kramers-Kronig(KK) detection system for the first time. Both 16-ary quadrature amplitude modulation(16-QAM) and 64-ary quadrature amplitude modulation(64-QAM) were considered in the experiment. The carrier tone was added on the transmitter side using the virtual carrier-assisted single sideband(VCA-SSB) method to meet the minimum phase(MP) condition. Under the MP condition, KK detection only needs the intensity of the optical signal to be detected by one photodiode(PD) to retrieve the phase information. However, the virtual carrier tone increases the carrier-to-signal power ratio(CSPR), which results in a high peak-to-average power ratio(PAPR) at the transmitter, causing an increase in quantization noise. To mitigate quantization noise in the low-resolution KK detection system, EFNS was applied. The application of EFNS increased the optimal CSPR of the KK detection system and improved receiver sensitivity. Using a 4-bit DAC and the EFNS, 80 km transmission was achieved in the 60-Gbit/s 64-QAM KK detection system.

关键词： optical fiber communications Kramers-Kronig receiver error-feedback noise shaping quantization noise carrier-to-signal power ratio

EG-STC: An Efficient Secure Two-Party Computation Scheme Based on Embedded GPU for Artificial Intelligence Systems

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第6期79卷 4021-4044页

作者： Zhenjiang dong Xin Ge Yuehua huang Jiankuo dong Jiang xu School of Computer Science Nanjing University of Posts and TelecommunicationsNanjing210023China School of Computer Nanjing University of Information Science and TechnologyNanjing210044China

This paper presents a comprehensive exploration into the integration of Internet of Things(IoT),big data analysis,cloud computing,and Artificial Intelligence(AI),which has led to an unprecedented era of *** delve into the emerging trend of machine learning on embedded devices,enabling tasks in resource-limited ***,the widespread adoption of machine learning raises significant privacy concerns,necessitating the development of privacy-preserving *** such technique,secure multi-party computation(MPC),allows collaborative computations without exposing private *** its potential,complex protocols and communication interactions hinder performance,especially on resource-constrained *** to enhance efficiency have been made,but scalability remains a *** the success of GPUs in deep learning,lever-aging embedded GPUs,such as those offered by NVIDIA,emerges as a promising ***,we propose an Embedded GPU-based Secure Two-party Computation(EG-STC)framework for Artificial Intelligence(AI)*** the best of our knowledge,this work represents the first endeavor to fully implement machine learning model training based on secure two-party computing on the Embedded GPU *** experimental results demonstrate the effectiveness of *** an embedded GPU with a power draw of 5 W,our implementation achieved a secure two-party matrix multiplication throughput of 5881.5 kilo-operations per millisecond(kops/ms),with an energy efficiency ratio of 1176.3 kops/ms/***,leveraging our EG-STC framework,we achieved an overall time acceleration ratio of 5–6 times compared to solutions running on server-grade *** solution also exhibited a reduced runtime,requiring only 60%to 70%of the runtime of previously best-known methods on the same *** summary,our research contributes to the advancement of secure and efficient machine learning implementations on resource-constrained embedded

关键词： Secure two-party computation embedded GPU acceleration privacy-preserving machine learning edge computing

Rapid and simultaneous determination of imidazolium and pyridinium ionic liquid cations by ion-pair chromatography using a monolithic column

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2012年第7期23卷 843-846页

作者： xu huang Hong Yu Ying Jie dong College of Chemistry and Chemical Engineering Harbin Normal UniversityHarbin 150025China

A method for rapid and simultaneous determination of imidazolium and pyridinium ionic liquid cations by ion-pair chromatography with ultraviolet detection was developed. Chromatographic separations were performed on a reversed-phase silica-based monolithic column using 1-heptanesulfonic acid sodium-acetonitrile as mobile phase. The effects of ion-pair reagent and acetonitrile concentration on retention of the cations were investigated. The retention times of the cations accord with carbon number rule. The method has been successfully applied to the determination of four ionic liquids synthesized by organic chemistry laboratory.

关键词： Ionic liquids Ion-pair chromatography Monolithic column Ultraviolet detection

Research on Adaptive TSSA-HKRVM Model for Regression Prediction of Crane Load Spectrum

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2023年第9期136卷 2345-2370页

作者： dong Qing Qi Song Shuangyun huang Gening xu College of Mechanical Engineering Taiyuan University of Science and TechnologyTaiyuan030024China Zhuzhou Tianqiao Crane Co. Ltd.Zhuzhou412001China

For the randomness of crane working load leading to the decrease of load spectrum prediction accuracy with time,an adaptive TSSA-HKRVM model for crane load spectrum regression prediction is *** heterogeneous kernel relevance vector machine model(HKRVM)with comprehensive expression ability is established using the complementary advantages of various kernel *** combination strategy consisting of refraction reverse learning,golden sine,and Cauchy mutation+logistic chaotic perturbation is introduced to form a multi-strategy improved sparrow algorithm(TSSA),thus optimizing the relevant parameters of *** adaptive updatingmechanismof the heterogeneous kernel RVMmodel under themulti-strategy improved sparrow algorithm(TSSA-HKMRVM)is defined by the sliding window design *** on the sample data of the measured load spectrum,the trained adaptive TSSA-HKRVMmodel is employed to complete the prediction of the crane equivalent load *** this method toQD20/10 t×43m×12mgeneral bridge crane,the results show that:compared with other prediction models,although the complexity of the adaptive TSSA-HKRVMmodel is relatively high,the prediction accuracy of the load spectrum under long periods has been effectively improved,and the completeness of the load information during thewhole life cycle is relatively higher,with better applicability.

关键词： Heterogeneous kernel function RVM TSSA adaptive update mechanism equivalent load spectrum

A New Class of Multi-wavelet Bases: V-System

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2012年第1期28卷 105-120页

作者： Chao huang Li Hua YANG dong xu QI College of Mathematics and Computational Science Shenzhen UniversityShenzhen 518060P.R.China School of Mathematics and Computational Science Sun Yat-sen UniversityGuangdong Province Key Laboratory of Computational ScienceGuangzhou 510275P.RChina Faculty of Information Technology Macao University of Science and TechnologyMaeauP.R.China

The V-system is a complete orthogonal system of functions defined on the interval [0, 1], generated by finite Legendre polynomials and the dilation and translation of a function generator, which consists of a finite number of continuous and discontinuous functions. The V-system has interesting properties, such as orthogonality, symmetry, completeness and short compact support. It is shown in this paper that the V-system is essentially a special multi-wavelet basis. As a result, some basic properties of the V-system are established through the well-developed theory of multi-wavelets. From this point of view, more other V-systems are constructed.

关键词： Multi-wavelets V-system complete orthogonal system

OSCILLATION AMPLITUDE OF THE FREE END OF A FLEXIBLY MOUNTED RIGID CYLINDER IN TRIANGLE ARRANGEMENT

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 1998年第3期10卷 101-110页

作者： xu, Youheng dong, Liyun huang, dongqun Fudan Univ Shanghai China

Oscillation amplitude of the free end of a group of the three cylinders was studied. The results of three cylinder arrangement were compared with those of two cylinders in tandem/side-by-side arrangement under the same condition. The experimental results show that the rear cylinder of the three cylinders is affected more seriously than that of two cylinders in contrast arrangement. The main direction of oscillation is changed. The transversal oscillation is stronger than the longitudinal oscillation in the three cylinder arrangement. The transversal oscillation is much weaker than the longitudinal oscillation in the two cylinders arrangement. The large transversal oscillations are attained for the rear cylinder in the third arrangement (two cylinders in tandem arrangement with a side cylinder) at S/D=2.5 and 3.0.

关键词： Cylinders (containers) Flow measurement Oscillations Stability Water wave effects