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Polarization-encoded neural networks with simplified grating patch

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Science China Technological Sciences 2025年

作者： Chengyan ZHONG xiang wang Lingfei LI Yuanchi CUI Lei XIAO Dawei SONG Junxiong GUO Wen HUANG Yufeng GUO Yu LIU College of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications National and Local Joint Engineering Laboratory of RF Integration and Micro-Assembly Technology College of Integrated Circuits Hangzhou Global Scientific and Technological Innovation Centre Zhejiang University Nanjing Mumusili Technology Co. LTD School of Integrated Circuits Tsinghua University Institute of Advanced Study School of Electronic Information and Electrical Engineering Chengdu University State Key Laboratory of Electronic Thin Films and Integrated Devices School of Integrated Circuit Science and EngineeringUniversity of Electronic Science and Technology of China

Optical neural networks (ONNs) offer a promising solution for high-performance, energy-efficient artificial intelligence hardware by leveraging the parallelism and speed of light. However, the large-scale implementation of ONNs remains challenging due to the bulky footprint and complex control of optical synapses. In this work, we propose and simulate a plasmonic polarized synaptic architecture that overcomes the diffraction limit and enables ultra-compact ONNs. By tuning the polarization state of incident light, the optical transmittance through each plasmonic unit can be dynamically adjusted to represent a synaptic weight. Our plasmonic structures, with features as small as 40 nm, operate well below this limit in the visible spectrum (400–750 nm). Compared with diffraction and interference-based circuit designs, our proposed method achieves a substantial reduction in synaptic density by factors of 150000-fold and 1500-fold, respectively. Furthermore, we successfully demonstrate a proof-of-concept plasmonic ONN applied to the Canadian Institute for Advanced Research—10classes (CIFAR-10) dataset using a Visual Geometry Group network with 16 layers (VGG16) model. After training for 80epochs, the network achieves an accuracy of 93%. The polarization-tunable plasmonics paves the way towards scalable ONNs for next-generation artificial intelligence (AI) accelerators and smart sensors.

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新质生产力赋能乡村数字化治理:运作机理、实践悖论与风险规避

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河北学刊 2025年第1期45卷 202-209页

作者：王鹏王向清湘潭大学湘潭大学马克思主义学院

作为新时代乡村治理现代化的发展目标,乡村数字化治理是推进乡村振兴的关键环节。新质生产力赋能乡村数字化治理具有多重实施路径,通过“人的现代化”“物的现代化”“治理的现代化”与“技术的现代化”,立体构成赋能进程的运作机理。... 详细信息

作为新时代乡村治理现代化的发展目标,乡村数字化治理是推进乡村振兴的关键环节。新质生产力赋能乡村数字化治理具有多重实施路径,通过“人的现代化”“物的现代化”“治理的现代化”与“技术的现代化”,立体构成赋能进程的运作机理。在赋能过程中所呈现的实践悖论具体表征为乡村数字化治理需求显现脱节情形、乡村建设基础设施伴生缺失风险、乡村数字化治理专业人才短缺、乡村数字化治理泛起内源动力不足、城乡之间数字鸿沟愈加凸显等客观现象,从而阻滞了乡村数字化治理的实践进程。为消解新质生产力赋能乡村数字化治理的实践偏差,应实现治理内容的有效融合与治理需求的有效对接,助推数字设施的广泛普及与乡村资源的充分开发,推动专业人才的重点培育与治理主体数字素养的全面提升,促进内源动力的有效激活与公共合作精神的最终形成,提升新质技术的发展水平与赋能发展的制度保障。

关键词：新质生产力乡村数字化治理运作机理实践悖论风险规避

Coronarenes: recent advances and perspectives on macrocyclic and supramolecular chemistry

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Science China Chemistry 2018年第8期61卷 993-1003页

作者： Mei-xiang wang MOE Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology Department of Chemistry Tsinghua University

Synthetic macrocyclic host molecules always play an essential role in the establishment and development of supramolecular chemistry. Along with the continuous interests in the study of classical macrocycles, recent decades have witnessed the emergence and rapid development of the chemistry and supramolecular chemistry of novel and functional macrocycles. Owing to their easy availability, a self-tunable V-shaped cavity resulted from 1,3-alternate conformation, and diversified electronic features steered by the interplay between heteroatom linkages and aromatic rings, heteracalixaromatics act as a type of versatile and powerful macrocyclic hosts in molecular recognition and fabrication of supramolecular systems. Very recently, by means of engineering the bond connectivity or the recombination of chemical bonds within heteracalixaromatics, we have devised coronarenes, a new generation of macrocycles. In this concise review, macrocyclic and supramolecular chemistry of coronarenes are summarized in the order of their syntheses, structural features, molecular recognition and self-assembly properties. In the last part of this article, personal perspectives on the study of macrocyclic and supramolecular chemistry will also be discussed.

关键词： coronarenes heteracalixaromatics macrocycles molecular recognition non-covalent bond interactions

基于应用型专业人才培养视角的校企合作改革创新

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南宁师范大学学报（自然科学版） 2025年第1期42卷 25-30页

作者：汪向欣李舟广西信息职业技术学院数字艺术与传媒学院广西南宁530021

随着社会经济的不断发展和产业结构的持续升级,应用型人才的需求日益增长。作为培养应用型人才的有效途径,校企合作改革创新显得尤为重要。对校企合作的相关问题进行了探讨,包括校企合作的理论依据、应用型人才培养的内涵与特点,以及校... 详细信息

随着社会经济的不断发展和产业结构的持续升级,应用型人才的需求日益增长。作为培养应用型人才的有效途径,校企合作改革创新显得尤为重要。对校企合作的相关问题进行了探讨,包括校企合作的理论依据、应用型人才培养的内涵与特点,以及校企合作在应用型人才培养中的作用等,并从多个角度提出了校企合作改革创新的策略和路径,包括加强合作双方的沟通与协调、丰富合作形式、完善合作机制及激励机制、不断推进教学模式的改革、完善实训基地的建设和加强师资队伍的校企共建。在保障机制上,应重视政策支持与资金投入机制、人才培养与引进机制、合作机制与制度建设。以此提升应用型人才培养的质量,推动校企双方实现共赢发展。

关键词：校企合作应用型人才培养改革创新机制保障产学研融合

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New insights into disruption of iron homeostasis by environmental pollutants

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Journal of Environmental Sciences 2015年第8期27卷 256-258页

作者： xiang wang Tian Xia Department of Medicine Division of Nano Medicine University of California California Nano Systems Institute University of California

Among the numerous health conditions environmental pollutants can cause, chronic exposure to pollutants including persistent organic pollutants（POPs） and heavy metals has been shown to disturb a specific biological homeostatic process, the iron metabolism in human body. Disorders of iron metabolism are among the common diseases of humans and encompass a broad spectrum of diseases with different clinical manifestations, ranging from anemia to iron overload, and possibly to neurodegenerative diseases and ***–ferroportin（FPN） signaling is one of the key mechanisms responsible for iron supply, utilization, recycling, and storage, and recent studies demonstrated that exposure to environmental pollutants including POPs and heavy metals could lead to disruption of the hepcidin–FPN axis along with disordered systemic iron homeostasis and diseases. This article introduces and highlights the accompanying review article by Drs. Xu and Liu in this journal, which elaborates in detail the adverse effects of environmental pollutants on iron metabolism, and the mechanisms responsible for these toxicological outcomes. It also points out the knowledge gaps still existing in this subject matter. Research that will fill these gaps will improve our understanding of the issue and provide useful information to prevent or treat diseases induced by environmental pollutants.

关键词： Environmental pollution Persistent organic pollutants Heavy metals Iron homeostasis Hepcidin Ferroportin

High Chern number phase in topological insulator multilayer structures:A Dirac cone model study

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Chinese Physics B 2022年第9期31卷 217-224页

作者： Yi-xiang wang Fu-xiang Li School of Science Jiangnan UniversityWuxi 214122China School of Physics and Electronics Hunan UniversityChangsha 410082China

We employ the Dirac cone model to explore the high Chern number(C)phases that are realized in the magnetic-doped topological insulator(TI)multilayer structures by Zhao et al.[Nature 588419(2020)].The Chern number is calculated by capturing the evolution of the phase boundaries with the parameters,then the Chern number phase diagrams of the TI multilayer structures are *** high-C behavior is attributed to the band inversion of the renormalized Dirac cones,along with which the spin polarization at theΓpoint will get ***,another two TI multilayer structures as well as the TI superlattice structures are studied.

关键词： topological insulator multilayer Chern number phase diagram

Gray codes over certain run-length sequences for local rank modulation

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Science China(Information Sciences) 2018年第10期61卷 98-113页

作者： xiang wang Fang-Wei FU National Computer Network Emergency Response Technical Team The Chern Institute of Mathematics and LPMC Nankai University

In the local rank modulation(LRM) scheme, a sliding window produces a sequence of permutations by moving over a sequence of variables. LRM has been presented as a method of storing data in flash memory, which represents a natural generalization of the classical rank modulation scheme. In this paper, we present a study on Gray codes over certain run-length sequences for the(1, 2, n)-LRM scheme to simulate virtual multilevel flash memory cells while maintaining the advantages of LRM. Unlike previous studies on the LRM scheme, we present Gray codes over certain run-length sequences in the(1, 2, n)-LRM scheme. This class of Gray codes can overcome the drawback of the many distinct charge levels required in the rank modulation scheme and in certain Gray codes for LRM. Furthermore, we demonstrate that the proposed codes have an asymptotically optimal rate.

关键词： flash memory local rank modulation Gray codes rank modulation run-length sequences

Unintentional modulation microstructure enlargement

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Journal of Systems Engineering and Electronics 2022年第3期33卷 522-533页

作者： SUN Liting wang xiang HUANG Zhitao Department of Electronic Science National University of Defense TechnologyChangsha 410073China

Radio frequency fingerprinting(RFF)is a technology that identifies the specific emitter of a received electromagnetic signal by external measurement of the minuscule hardware-level,device-specific *** RFF-related information is mainly in the form of unintentional modulation(UIM),which is subtle enough to be effectively imperceptible and is submerged in the intentional modulation(IM).It is necessary to minimize the influence of the IM and expand the slight differences between emitters for successful *** paper proposes a UIM microstructure enlargement(UMME)method based on feature-level adaptive signal decomposition(ASD),accompanied by autocorrelation and cross-correlation *** common IM part is evaluated by analyzing a newly-defined benchmark *** different indexes are used to quantify the similarity,distance,and dependency of the RFF features from different *** are conducted based on the real-world signals transmitted from 20 of the same type of radar in the same working *** visual image qualitatively shows the magnification of feature differences;different indicators quantitatively describe the changes in *** with the original RFF feature,recognition results based on the Gaussian mixture model(GMM)classifier further validate the effectiveness of the proposed algorithm.

关键词： radio frequency fingerprinting(RFF) unintentional modulation(UIM) adaptive signal decomposition(ASD) variational mode decomposition(VMD) similarity measurement

Unintentional modulation evaluation in time domain and frequency domain

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Chinese Journal of Aeronautics 2022年第4期35卷 376-389页

作者： Liting SUN xiang wang Zhitao HUANG Department of Electronic Science National University of Defense Technology410073 ChangshaChina

With the development of wireless communication technology, the electromagnetic environment has become more and more complex. Conventional signal identification methods are difficult to accurately identify illegal devices. However, electromagnetic signals have an unavoidable device-specific characteristic unintentionally generated by a transmitter, appearing in the form of an Un Intentional Modulation(UIM), namely Radio Frequency Fingerprint(RFF). RFFs can be used to uniquely identify an emitter to match a received signal with its source. In this paper, the authors propose a novel RFF scheme to separate UIM part from the original signals from the time and frequency domain, and then utilize non-Gaussian measuring tools to extract a set of dimensionreduced secondary features. Additionally, Singular Value Reconstruction(SVR) is developed to extract UIM in the frequency spectrum. In time domain, a curve-fitting residual method is proposed to extract the UIM on the estimated instantaneous phase based on Maximum Likelihood Estimator(MLE). Various aspects of the proposed method are evaluated, including identification accuracy under various Signal-to-Noise Ratio(SNR) conditions, energy relationships between the UIM and the whole signal, and sensitivity to training set size. Compared with other methods, experimental results based on real-world signals prove that the proposed method has remarkable performance and high practicability.

关键词： Instantaneous phase estimation Pattern recognition Radio Frequency Fingerprint(RFF) Singular Value Decomposition(SVD) Un Intentional Modulation(UIM)