检索结果-南通市图书馆

Unsupervised multiplex graph diffusion networks with multi-level canonical correlation analysis for multiplex graph representation learning

引用

Science China(information Sciences) 2025年第03期68卷 66-79页

作者： Sichao FU Qinmu PENG Yange HE Baokun DU Bin ZOU Xiao-Yuan JING Xinge YOU School of Electronic information and communications Huazhong University of Science and Technology Platform Operation and Marketing center JD Retail Faculty of Mathematics and Statistics Hubei Key Laboratory of Applied Mathematics Hubei University School of Computer Science Wuhan University

In recent years, unsupervised multiplex graph representation learning(UMGRL) has received increasing research interest, which aims to learn discriminative node features from the multiplex graphs supervised by data without the guidance of labels. Although these designed UMGRL methods have obtained great success in various graph-related tasks, most existing UMGRL models still have the following issues: highly depending on complex self-supervised strategies(i.e., data augmentation,pretext tasks, and negative pairs sampling), restricted receptive fields, and only aggregating low-frequency information between nodes. In this paper, we propose a simple unsupervised multiplex graph diffusion network(UMGDN) with the aid of multi-level canonical correlation analysis to solve the above issues. Specifically, we first decouple the feature transform and propagation processes of the graph convolution layer to further improve the generalization of the learnable parameters. And then, we propose adaptive diffusion propagation to capture long-range dependency relationships between nodes, not the local neighborhood interactions. Finally, a multi-level canonical correlation analysis loss on both the feature transform and propagation processes is proposed to maximize the correlation of the same node features from multiple graphs for guiding model optimization. Compared to the existing UMGRL models, our proposed UMGDN does not need to introduce any data augmentation, negative pairs sampling techniques, complex pretext tasks, and also adaptively aggregates the optimal frequency information between nodes to generate more robust node embeddings. Extensive experiments on four popular datasets and two graph-related tasks demonstrate the effectiveness of the proposed method.

关键词： unsupervised multiplex graph representation learning graph neural networks node classification node clustering

来源：

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Parameters Optimization of Decoy-State Phase-Matching Quantum Key Distribution Based on the Nature-Inspired Algorithms

引用

Chinese Physics Letters 2025年第1期42卷 23-27页

作者： Chang Liu Yue Li Haoyang Wang Kaiyi Shi Duo Ma Yujia Zhang Haiqiang Ma State Key Laboratory of information photonics and Optical communications School of ScienceBeijing University of Posts and TelecommunicationsBeijing 100876China

Phase-matching quantum-key distribution(PM-QKD)has achieved significant results in various practical ***,real-time communication requires dynamic adjustment and optimization of key parameters during *** this letter,we predict the PM-QKD parameters using nature-inspired algorithms(NIAs).The results are obtained from an exhaustive traversal algorithm(ETA),which serves as a *** mainly study the parameter optimization effects of the two NIAs:ant colony optimization(ACO)and the genetic algorithm(GA).The configuration of the inherent parameters of these algorithms in the decoy-state PM-QKD is also *** simulation results indicate that the parameters obtained by the ACO exhibit superior convergence and stability,whereas the GA results are relatively ***,more than 97%of the key rates predicted by both algorithms are highly consistent with the optimal key ***,the relative error of the key rates remained below 10%.Furthermore,NIAs maintain power consumption below 8 W and require three orders of magnitude less computing time than ETA.

关键词： optimization scattered letter

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Quantifying information Flow between Two Chaotic Semiconductor Lasers Using Symbolic Transfer Entropy

引用

Chinese Physics Letters 2012年第3期29卷 48-51页

作者： LI Nian-Qiang PAN Wei YAN Lian-Shan LUO Bin XU Ming-Feng TANG Yi-Long center for information photonics&communications School of Information Science and TechnologySouthwest Jiaotong UniversityChengdu 610031

Symbolic transfer entropy(STE)is employed to quantify the dominant direction of information flow between two chaotic-semiconductor-laser time *** information flow in unidirectionally and bidirectionally coupled systems was analyzed *** results show that the dependence relationship can be revealed if there exists any coupling between two chaotic semiconductor *** importantly,in both unsynchronized and good synchronization regimes,the STE can be used to quantify the direction of information flow between the lasers,although the former case leads to a better *** results thus establish STE as an effective tool for quantifying the direction of information flow between chaotic-laser-based systems.

关键词： synchronization laser chaotic

来源：

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

Multi-protocol relay chaining for large-scale quantum key distribution networks

引用

Chinese Physics B 2025年第1期34卷 80-94页

作者： Yuan Cao Xiaosong Yu Yongli Zhao Chunhui Zhang Xingyu Zhou Jie Zhang Qin Wang Institute of Quantum information and Technology Nanjing University of Posts and TelecommunicationsNanjing 210003China State Key Laboratory of information photonics and Optical communications Beijing University of Posts and TelecommunicationsBeijing 100876China

As the first stage of the quantum Internet,quantum key distribution(QKD)networks hold the promise of providing long-term security for diverse *** existing QKD networks have been constructed based on independent QKD protocols,and they commonly rely on the deployment of single-protocol trusted relay chains for long *** by the evolution of QKD protocols,large-scale QKD networking is expected to migrate from a single-protocol to a multi-protocol paradigm,during which some useful evolutionary elements for the later stages of the quantum Internet may be *** this work,we delve into a pivotal technique for large-scale QKD networking,namely,multi-protocol relay chaining.A multi-protocol relay chain is established by connecting a set of trusted/untrusted relays relying on multiple QKD protocols between a pair of QKD *** structures of diverse multi-protocol relay chains are described,based on which the associated model is formulated and the policies are defined for the deployment of multi-protocol relay ***,we propose three multi-protocol relay chaining *** simulations indicate that the designed heuristics can effectively reduce the number of trusted relays deployed and enhance the average security level versus the commonly used single-protocol trusted relay chaining methods on backbone network topologies.

关键词： quantum communications quantum networks trusted relay untrusted relay

来源：

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

Automatic phase-matching technique for cascaded electro-optic frequency combs

引用

Chinese Optics Letters 2025年第1期 150-154页

作者：王瑾尹飞飞尹子恺王正徐淏岩戴一堂徐坤 State Key Laboratory of information photonics and Optical communications Beijing University of Posts and Telecommunications

We propose a novel automatic phase-matching method for generating optical frequency combs using cascaded electrooptic modulators. By analyzing the power changes of different spectral lines, our method enables real-time monitoring and dynamic adjustment to achieve precise phase matching. Experiments have confirmed the fast phase matching and the adjustable spacing of a flat electro-optic frequency comb and its long-term stability. This method provides flexible and efficient light source solutions for optical communications, spectral analysis, and optical measurements.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Magnetic Induction Communication in Extreme Environments:Principles,Technologies,and Challenges

引用

China communications 2025年第1期22卷 256-264页

作者： Jiang Tao Zhang Yixin Liu Guanghua Research center of 6G Mobile communications School of Cyber Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China College of information and Communication National University of Defense TechnologyWuhan 430030China

Wireless communications in extreme environments,such as underwater and underground,is an essential technology for interconnecting various devices and enables data transmission and *** wireless technologies using electromagnetic(EM)waves face many known problems,such as high path loss,unpredictable multi-path fading,and large antenna size in the lossy *** this article,the magnetic induction(MI)based physical layer communication is introduced as a promising solution for wireless transmissions in extreme ***,the fundamentals of the MI-based communications are ***,with the goal of establishing reliable and low-power links between small-size devices,we review several key physical layer technologies for MI-based communications,including the MIbased signal modulations,magnetic beamforming,and relay transmissions,and summarize their state-of-theart research ***,the related open issues and challenges in each area are analyzed and presented for future investigations.

关键词： beamforming magnetic induction communications relay transmission signal modulation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Non-stationarity Characteristics in Dynamic Vehicular ISAC Channels at 28 GHz

引用

Chinese Journal of Electronics 2025年第1期34卷 73-81页

作者： Zhengyu Zhang Ruisi He Mi Yang Xuejian Zhang Ziyi Qi Hang Mi Guiqi Sun Jingya Yang Bo Ai School of Electronic and information Engineering Beijing Jiaotong University Henan High-Speed Railway Operation and Maintenance Engineering Research center

Integrated sensing and communications(ISAC) is a potential technology of 6G, aiming to enable end-to-end information processing ability and native perception capability for future communication systems. As an important part of the ISAC application scenarios, ISAC aided vehicle-to-everything(V2X) can improve the traffic efficiency and safety through intercommunication and synchronous perception. It is necessary to carry out measurement,characterization, and modeling for vehicular ISAC channels as the basic theoretical support for system design. In this paper, dynamic vehicular ISAC channel measurements at 28 GHz are carried out and provide data for the characterization of non-stationarity characteristics. Based on the actual measurements, this paper analyzes the time-varying PDPs, RMSDS and non-stationarity characteristics of front, lower front, left and right perception directions in a complicated V2X scenarios. The research in this paper can enrich the investigation of vehicular ISAC channels and enable the analysis and design of vehicular ISAC systems.

关键词： Performance evaluation 6G mobile communication information processing Integrated sensing and communication Safety Vehicle dynamics Vehicle-to-everything System analysis and design

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Optimal Dynamical Gauge in the Quantum Rabi Model

引用

Chinese Physics Letters 2025年第2期42卷 13-25页

作者： Yuqi Qing Liangsheng Li Wen-Long You Yueheng Lan Maoxin Liu State Key Laboratory of information photonics and Optical communications Beijing University of Posts and TelecommunicationsBeijing 100876China Science and Technology on Electromagnetic Scattering Laboratory Beijing 100854China College of Science Nanjing University of Aeronautics and AstronauticsNanjing211106China School of Systems Science/Institute of Nonequilibrium Systems Beijing Normal UniversityBeijing 100875China

We have investigated the gauge dependence of physical observables in a quantum Rabi model under different potential fields arising from the Hilbert space truncation of the atomic degrees of *** both the square-well and harmonic potentials,the optimal gauge for the ground-state energy depends on the cavity frequency,which is optimal in the low-frequency limit,whereas the Coulomb gauge is optimal in the high-frequency *** a dynamic quantity,such as an out-of-time-order correlator,we have demonstrated the necessity of introducing an optimal dynamic *** study provides deeper insight into the intricate relationship between gauge choice and the dynamics of quantum electrodynamics systems,resulting in more accurate theoretical frameworks.

关键词： gauge optimal quantum

来源：

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

Thermal tuning of chirped SOI sidewall grating for tunable wavelength, delay, and bandwidth

引用

Optoelectronics Letters 2021年第4期17卷 205-208页

作者： DING Jia-yue ZOU Xi-hua ZOU Fang PAN Wei YAN Lian-shan LUO Bin center for information photonics&communications School of Infonnation Science ami TechnologySouthwest Jiaotong UniversityChengdu 611756China

In this work, we design a silicon-on-insulator(SOI) sidewall grating with tunable wavelength, delay, and bandwidth through thermal tuning. Incorporating uniform sidewall corrugations and a linearly chirped rib waveguide, the thermo-optic effect imposed on chirped rib waveguide changes the effective refractive index, due to the resultant of the temperature gradient. Consequently, tunable wavelength, delay, and bandwidth in SOI sidewall grating are achieved. In the numerical simulations, the designed SOI grating is demonstrated with a tunable wavelength from 1 560.7 nm to 1 561.9 nm, a tunable delay from 0 to 38 ps, and a tunable bandwidth from 1 nm to 1.5 nm.

关键词： tunable tuning SOI

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Improved quantum randomness amplification with finite number of untrusted devices based on a novel extractor

引用

Chinese Physics B 2018年第1期27卷 263-266页

作者：徐明峰潘炜闫连山罗斌邹喜华穆鹏华张力月 center for information photonics and communications Southwest Jiaotong University

Quantum randomness amplification protocols have increasingly attracted attention tbr their tantastic ability to ampllI~, weak randomness to almost ideal randomness by utilizing quantum systems. Recently, a realistic noise-tolerant randomness amplification protocol using a finite number of untrusted devices was proposed. The protocol has the composable security against non-signalling eavesdroppers and could produce a single bit of randomness from weak randomness sources, which is certified by the violation of certain Bell inequalities. However, the protocol has a non-ignorable limitation on the min- entropy of independent sources. In this paper, we further develop the randomness amplification method and present a novel quantum randomness amplification protocol based on an explicit non-malleable two independent-source randomness extractor, which could remarkably reduce the above-mentioned specific limitation. Moreover, the composable security of our improved protocol is also proposed. Our results could significantly expand the application range for practical quantum randomness amplification, and provide a new insight on the practical design method for randomness extraction.

关键词： quantum random number generation quantum randomness amplification quantum key distribu-tion

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：