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中国科学：信息科学（英文版）
中国科学：信息科学（英文版）

周光召

月刊

1674-733X

informatics@scichina.org

010-64015683

100717

北京东黄城根北街16号

中国科学：信息科学（英文版）/Journal Science China Information SciencesCSCDCSTPCDEISCI
查看更多>>《中国科学》是中国科学院主办、中国科学杂志社出版的自然科学专业性学术刊物。《中国科学》任务是反映中国自然科学各学科中的最新科研成果，以促进国内外的学术交流。《中国科学》以论文形式报道中国基础研究和应用研究方面具有创造性的、高水平的和有重要意义的科研成果。在国际学术界，《中国科学》作为代表中国最高水平的学术刊物也受到高度重视。国际上最具有权威的检索刊物SCI，多年来一直收录《中国科学》的论文。1999年《中国科学》夺得国家期刊奖的第一名。
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    Fully distributed dynamic event-triggered formation-containment tracking for multiagent systems with multiple types of disturbances

    Weihua LIHuaguang ZHANGJuan ZHANGRui WANG...
    164-182页
    查看更多>>摘要：This paper is dedicated to addressing the time-varying output formation-containment tracking(TVOFCT)problem for heterogeneous linear multiagent systems(MASs)with multiple types of disturbances under directed communication topology.The agents are divided into tracking leaders,formation leaders,and followers.In the output space,the formation leaders are required to form an expected geometric formation while tracking the tracking leader,and the followers are required to enter the convex hull spanned by formation leaders.First,a disturbance observer is designed to observe the disturbance with deterministic dynamics.Then,by combining adaptive technology with event-triggered technology,an independent fully distributed dynamic event-triggered(FDDET)compensator is designed to estimate the state of the tracking leader.The main advantages of this compensator lie in the following three aspects:(1)the adaptive weight does not increase unboundedly;(2)the interval time between events is expanded;(3)the design does not rely on any global information.Similar to the design of this compensator,an independent FDDET convex hull observer is further designed to observe the convex hull spanned by formation leaders.Subsequently,based on the designed disturbance observer,compensator,and convex hull observer,the adaptive disturbance rejection control input which can make the MASs achieve TVOFCT is formulated.Finally,a numerical simulation is provided to clearly verify the validity of the theoretical results.
      原文链接:
    • 万方数据
    • 维普

    Doppler-resilient waveform design in integrated MIMO radar-communication systems

    Zhengchun ZHOUBing LIUBingsheng SHENAvik Ranjan ADHIKARY...
    183-198页
    查看更多>>摘要：In recent years,the increased high-rate wireless services(5G and 6G)and reliable sensing ca-pabilities(automotive radar,air traffic control,geophysical monitoring),have led to more serious spectrum congestion.Conventionally,radars and communication systems are often seen to be"competing"for the same resources.In this scenario,an integrated platform for radar and communication systems seems to be an optimal solution to address the problem.In this paper,we propose a preamble waveform design based on zero-correlation zone(ZCZ)and zero odd-correlation zone(ZOCZ)sequence sets,which are Doppler re-silient in multiple-input,multiple-output(MIMO)radar.The preamble waveforms can be simultaneously used for channel estimation and radar sensing in RadCom systems.The ambiguity function of the proposed waveforms displays low/zero sidelobes within a time-delay correlation zone.Finally,we give some numerical results to show the efficiency of the proposed waveforms in radar sensing and channel estimation.
      原文链接:
    • 万方数据
    • 维普

    Slicing capacity-centered mode selection and resource optimization for network-assisted full-duplex cell-free distributed massive MIMO systems

    Jie WANGJiamin LIPengcheng ZHUDongming WANG...
    199-216页
    查看更多>>摘要：Network-assisted full-duplex(NAFD)cell-free distributed massive multiple-input multiple-output(MIMO)systems enable uplink(UL)and downlink(DL)communications within the same time-frequency resources,which potentially reduce latency by avoiding the overhead of switching UL/DL modes.However,how to choose UL/DL modes remains an important factor affecting system performance.With the dramatic increase in the number of users and access points(APs),massive access brings significant overhead in the mode selection.Additionally,the different quality of service(QoS)among users also makes the ef-fective utilization of resources difficult.As one of the most promising technologies in sixth-generation(6G),network slicing enables the adaptive configuration of limited UL/DL resources through the resource isolation assisted NAFD technique.Therefore,we propose a slicing capacity-centered scheme.Under this scheme,APs are motivated by slicing requirements and associated slices to form different subsystems.Collaborative mode selection and resource allocation are performed within each subsystem to reduce overhead and improve resource utilization.To implement this scheme efficiently,a double-layer deep reinforcement learning(DRL)mechanism is used to realize the joint optimization of mode selection and resource allocation.Simulation results show that the slicing capacity-centered scheme can effectively improve resource utilization and reduce overhead.
      原文链接:
    • 万方数据
    • 维普

    Modulated symbol-based one-time pad secure transmission scheme using physical layer keys

    Xiaoyan HUZheng WANKaizhi HUANGLiang JIN...
    217-235页
    查看更多>>摘要：This paper proposes a novel modulated symbols-based one-time pad(SOTP)secure transmission scheme using physical layer keys.Unlike classical physical layer key generation and exclusive OR(XOR)encryption in the discrete binary space,we design a framework for modulated symbols-based one-time pad(OTP)encryption,where the cryptographic primitive and mathematical model of SOTP is given to build a practical cryptographic protocol.Compared with existing physical layer encryption(PLE)schemes,we provide rigorous proof that the framework can meet perfect secrecy and correctness requirements.In ad-dition,we provide a specific scheme of physical layer OTP secure transmission for quadrature amplitude modulation(QAM)and phase-shift keying(PSK)symbols based on physical layer keys.This scheme realizes the unification of bit encryption and symbol encryption,which can adaptively select the quantization level according to the signal-to-noise ratio(SNR)to minimize the symbol error rate(SER).Further,we analyze the performance quantitatively and derive the closed-form expressions of SER,which indicates that the pro-posed scheme has a lower SER.Finally,simulation results verify that the proposed symbol-wise OTP secure transmission scheme can achieve perfect secrecy and high reliability.
      原文链接:
    • 万方数据
    • 维普

    Hybrid electromechanical properties of hetero-doped and homogeneously bonded dual-mode pressure sensor for indoor body area network node

    Junbin YUShuai XIANJinbiao MUMin WANG...
    236-249页
    查看更多>>摘要：Pressure sensors are considerably important for continuous monitoring of human movement and the surrounding environment to construct a caregiving system for the elderly living alone.The challenge for pressure sensors that still remains is combining self-driven,comfort,and multifunctionalization.Herein,an all-in-one conformal pressure sensor(ACPS)based on a homogeneous integrated triboelectric-piezoelectric hybrid sensor is proposed.The ACPS has dual-mode sensing properties due to coupling triboelectrification and piezoelectric effect ensuring a stable response to various external stimulations.Silver-coated glass micro-spheres and polyacrylonitrile were uniformly filleted into the silicone rubber substrate using a hetero-doping method to create a stretchable electrode layer with flexible conformal characteristics and a piezoelectric layer with excellent piezoelectric properties,respectively.Meanwhile,the triboelectric layer was fabricated using the same silicone rubber,allowing ACPS to be homogeneously bonded into an all-in-one structure with reli-able durability.This allowed various functional layers to have outstanding interface characteristics and thus improve the electrical transmission effect.The developed ACPS had outstanding sensitivity(1.04 V/104 Pa),high linearity(about 0.984),a wide measurement range(10-700 kPa),and can accurately and continuously distinguish multiple movements.Furthermore,using a homemade signal processing circuit,ACPSs can be deployed in the human body and the room as indoor body area network nodes.When successfully applied to the remote tracking of daily dynamic home life and the remote operation of small electrical equipment,these ACPSs can achieve real-time caregiving for the elderly living alone.As an application area desperately needed by society,this study envisions a caregiving system for the elderly living alone without violating personal privacy.
      原文链接:
    • 万方数据
    • 维普

    Radiation build-up and dissipation in Raman random fiber laser

    Shengtao LINZinan WANGJiaojiao ZHANGPan WANG...
    250-256页
    查看更多>>摘要：Raman random fiber laser(RRFL)is a complex physical system that arises from the distributed Raman amplification and the intrinsic stochasticity of fiber scattering.The analysis of the underlying light-wave kinetics at steady state has been the focus of considerable interest.However,the transient state,such as the RRFL build-up and dissipation,is particularly important for revealing the lightwave interaction process.Here,we investigate for the first time the RRFL dynamics at the transient state and track the RRFL temporal and spectral evolution theoretically and experimentally.Particularly,with the contribution of random distributed feedback,RRFL build-up exhibits continuous Verhulst logistic growth curves without cavity-related features,which is significantly different from the step-like growth curve of conventional fiber lasers.Furthermore,the radiation build-up duration is inversely related to the pump power,and the spectral evolution of the RRFL undergoes two phases,i.e.,from spectral density increase to spectral broadening.From the steady state to the pump switch-off state,the RRFL output power dissipates immediately,and the remaining Stokes lightwave from the Rayleigh scattering will gradually disappear after one round trip.This work provides new insights into the transient dynamic features of the RRFL.
      原文链接:
    • 万方数据
    • 维普

    Conversion of a single-layer ANN to photonic SNN for pattern recognition

    Yanan HANShuiying XIANGTianrui ZHANGYahui ZHANG...
    257-266页
    查看更多>>摘要：This work presents a complete conversion scheme for photonic spiking neural networks(SNNs).We verified that the output of an artificial neural network(ANN)trained with the simulated optical activation function can be directly converted into the spike rate of a photonic spiking neuron model.To reveal the feasibility of hardware implementation,we considered the effects of different bit precisions of data and weight,noise level,and bias current mismatch on the converted results.The proposed scheme was evaluated using the Deterding vowel,IRIS,TIDIGITS,and MNIST datasets for pattern recognition,and achieved mean accuracies of 95.80％,98.67％,96.19％,and 92.33％,respectively.The proposed scheme can convert an ANN into a photonic SNN with almost no precision loss,and the performance was comparable to that of an ANN trained with the rectified linear unit function.The proposed scheme can enable the high-performance implementation of photonic SNNs.
      原文链接:
    • 万方数据
    • 维普

    A strong physical unclonable function with machine learning immunity for Internet of Things application

    Pengpeng RENYongkang XUELinglin JINGLining ZHANG...
    267-279页
    查看更多>>摘要：The physical unclonable functions(PUFs)are novel cryptographic primitives in modern hardware security systems.Compared with traditional alternatives based on digital keys and non-volatile memory(NVM),the PUF system shows great unclonability,high efficiency,and physical attack resilience.However,the conventional PUF design suffers from weak machine learning immunity,high storage overhead,and unreliability,making it difficult to implement in the Internet of Things(IoT)and edge computing applications.This paper presents a new PUF design that could solve the proposed obstacles.By utilizing the emission probability of traps commonly found in nano-scaled transistors,a model-based PUF system with strong machine learning resistance could be achieved.This PUF design,called Prob-PUF,needs fewer challenge-response pairs(CRPs)space and reveals superior resistance to modeling attacks due to the mixture of stable/random bits in its output response.Moreover,the Prob-PUF system could reach a high level of uniqueness and robustness,making it a potential candidate for future cryptographically secured protocols within the IoT.
      原文链接:
    • 万方数据
    • 维普

    Multi-carrier Tb/s silicon photonic coherent receiver

    Zhen WANGXingfeng LIJingchi LIJian SHEN...
    280-287页
    查看更多>>摘要：We propose a silicon polarization-diversity coherent receiver for wavelength-multiplexing trans-mission without using the large-footprint arrayed waveguide grating(AWG).We have integrated our proposed coherent receiver on the silicon-on-insulator(SOI)platform for high-capacity transmission.In the proposed coherent receiver,high-frequency photocurrent signals from other wavelengths are suppressed by electri-cal low-pass filters.Moreover,the signal-signal beat interference(SSBI)generated from each wavelength is eliminated by the balanced detection.These two features lend to the proposed coherent receiver being free of the mm-scale AWG.We have demonstrated our proposed coherent receiver to detect a 1.12-Tb/s wavelength-division-multiplexed and polarization-division-multiplexed 16-ary quadrature amplitude modula-tion(PDM-16-QAM)signal.The compact footprint of the silicon chip promises small-form-factor receivers for future ultra-high-capacity coherent communication systems that require a high integration level and low fabrication cost.
      原文链接:
    • 万方数据
    • 维普

    In situ plasmonic & electrochemical fiber-optic sensor for multi-metal-ions detection

    Xiaoling PENGZhiyong YANGBo PENGZhi LI...
    288-298页
    查看更多>>摘要：High precision and high throughput detection of heavy metal ions is essential for water quality monitoring and assessment.Herein,we propose a plasmonic & electrochemical dual-mode fiber sensing probe for label-free and real-time detection of multiple ions(Pb2+and Cu2+as examples).This sensor comprises a multimode fiber-single mode fiber reflection probe,the outer surface of which is coated with a gold nanofilm to excite the surface plasmon resonance(SPR)optically and simultaneously serves as an electrochemical working electrode.In traditional electrochemical detection,the enrichment of ions cannot be detected in real-time.However,by utilizing the plasmonic & electrochemical dual-mode detection method,various kinds of metal ions can be deposited onto the gold nanofilm and selectively oxidized during forward potential scanning,and the entire electrochemical process can be monitored by SPR measurement.We experimentally demonstrate that the sensor can simultaneously detect Pb2+and Cu2+in a mixed solution in real-time,providing a linear response over the ion concentration range from 10-12 to 10-7 M and offering an excellent detection limit(1.69× 10-14-5.49× 10-13 M).The proposed dual-mode fiber sensor has the benefits of remote sensing,compact footprint,and cost-effectiveness and shows excellent potential for water quality risk management in difficult-to-reach environments.
      原文链接:
    • 万方数据