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3rd International Conference on Laser, Optics, and Optoelectronic Technology, LOPET 2023

作者： Chen, Haihong Zhang, Weilun Chen, Yang Ye, Mengyuan Yu, Yu Wuhan National Laboratory for Optoelectronics School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan430074 China School of Automation China University of Geosciences Wuhan430074 China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Wuhan430074 China

ISBN: (纸本)9781510667624

Grating coupler, one of the essential devices in silicon-based optical integrated chip, is still suffering with low coupling efficiency and small operation bandwidth. In this paper, we design and experimentally demonstrate a silicon nitride (Si3N4) grating coupler with high coupling efficiency and large bandwidth. Instead of using bottom distributed Bragg reflector, metal mirror or other complex designs, a bottom silicon grating reflector based on a 220 nm industrially standard silicon-on-insulator wafer is employed to improve coupling efficiency and simplify the fabrication processes. The interlayer coupler enables the light transmission between Si3N4 and Si waveguides. By optimizing structure parameters and apodizing the Si3N4 grating coupler, a high coupling efficiency of -2.37 dB and large 1-dB bandwidth of 53 nm are obtained. © 2023 SPIE.

关键词： Silicon nitride

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Multi-Hop Correlation Preserving Hashing for Efficient Hamming Space Retrieval

Multi-Hop Correlation Preserving Hashing for Efficient Hammi...

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IEEE International Conference on data Mining (ICDM)

作者： Liang Li Weiwei Sun School of Computer Science Fudan University Shanghai Key Laboratory of Data Science Shanghai Institute of Intelligent Electronics & Systems

Hamming space retrieval, allowing for retrieval within a fixed Hamming radius rather than scanning all instances linearly, has gained widespread attention for retrieving nearest neighbors at a fixed computational cost. Current models have focused only on shared-label correlations as the label-wise semantics while ignoring the potential multi-hop constraints, which are the unique constraints in Hamming space retrieval under multi-label conditions. Instances with multi-dimensional labels form a multi-hop correlation graph rather than several clusters in a single-label scenario. So there are potential distance constraints between dissimilar instances connected through multi-hop correlations. Existing models blindly expanding the dissimilar instances will break the multi-hop correlations and finally disrupt the hashing consistency of the shared-label instances. This paper first defines the multi-hop correlations to address these challenges with the multi-hop preserving strategy for dissimilar instances to help the Hamming distance converge to the expected range. Meanwhile, we introduce a Wasserstein-1-distance-based loss to reduce information loss while encoding compactly. We evaluate our proposed model on three commonly used datasets with extensive experiments to demonstrate that our model achieves significant improvements over existing methods.

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Ultra-low-loss multi-layer 8×8 microring optical switch

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Photonics Research 2023年第5期11卷 712-723页

作者： XIN LI WEI GAO LIANGJUN LU JIANPING CHEN LINJIE ZHOU State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Key Laboratory of Navigation and LocationServicesShanghai Institute for Advanced Communication and Data ScienceDepartment of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China SJTU-Pinghu Institute of Intelligent Optoelectronics Pinghu 314200China

Microring-based optical switches are promising for wavelength-selective switching with the merits of compact size and low power ***,the large insertion loss,the high fabrication,and the temperature sensitivity hinder the scalability of silicon microring optical switch *** this paper,we utilize a three-dimensional(3D)microring-based optical switch element(SE)on a multi-layer Si_(3)N_(4)-on-SOI platform to realize highperformance large-scale optical switch *** 3D microring-based SE consists of a Si∕Si_(3)N_(4) waveguide overpass crossing in the bottom and the top layers,and Si_(3)N_(4) dual-coupled microring resonators(MRRs)in the middle *** switch is calibration-free and has low insertion *** the 3D microring-based SEs,we implement an 8×8 crossbar optical switch *** the resonance wavelengths of all SEs are well aligned,only one SE needs to be turned on in each routing path,which greatly reduces the complexity of the switch *** optical transmission spectra show a box-like shape,with a passband width of~69 GHz and an average on-state loss of~0.37 *** chip has a record-low on-chip insertion loss of 0.52-2.66 *** also implement a non-duplicate polarization-diversity optical switch by using the bidirectional transmission characteristics of the crossbar architecture,which is highly favorable for practical applications.100 Gb/s dual-polarization quadrature-phase-shift-keying(DP-QPSK)signal is transmitted through the switch without significant *** the best of our knowledge,this is the first time that 3D MRRs have been used to build highly scalable polarization-diversity optical switch fabrics.

关键词： polarization microring optical

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Dual Intention Escape: Penetrating and Toxic Jailbreak Attack against Large Language Models 25

Dual Intention Escape: Penetrating and Toxic Jailbreak Attac...

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34th ACM Web Conference, WWW 2025

作者： Xue, Yanni Wang, Jiakai Yin, Zixin Ma, Yuqing Qin, Haotong Tao, Renshuai Liu, Xianglong State Key Laboratory of Complex & Critical Software Environment Beihang University Beijing China Zhongguancun Laboratory Beijing Beijing China Beihang University Beijing China Institute of Artificial Intelligence Beihang University Beijing China ETH Zurich Zurich Switzerland Institute of Information Science Beijing Jiaotong University Beijing China Zhongguancun Laboratory Beijing China Institute of Data Space Hefei Comprehensive National Science Center Hefei China

ISBN: (纸本)9798400712746

Recently, the jailbreak attack, which generates adversarial prompts to bypass safety measures and mislead large language models (LLMs) to output harmful answers, has attracted extensive interest due to its potential to reveal the vulnerabilities of LLMs. However, ignoring the exploitation of the characteristics in intention understanding, existing studies could only generate prompts with weak attacking ability, failing to evade defenses (e.g., sensitive word detect) and causing malice(e.g., harmful outputs). Motivated by the mechanism in the psychology of human misjudgment, we propose a dual intention escape (DIE) jailbreak attack framework to generate more stealthy and toxic prompts to deceive LLMs to output harmful content. For stealthiness, inspired by the anchoring effect, we designed the Intention-anchored Malicious Concealment(IMC) module that hides the harmful intention behind a generated anchor intention by the recursive decomposition block and contrary intention nesting block. Since the anchor intention will be received first, the LLMs might pay less attention to the harmful intention and enter response status. For toxicity, we propose the Intention-reinforced Malicious Inducement (IMI) module based on the availability bias mechanism in a progressive malicious prompting approach. Due to the ongoing emergence of statements correlated to harmful intentions, the output content of LLMs will be closer to these more accessible intentions, i.e., more toxic. We conducted extensive experiments under black-box settings, supporting that DIE could achieve 100% ASR-R and 92.9% ASR-G against GPT3.5-turbo. © 2025 Copyright held by the owner/author(s).

关键词： dual intention escape

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Analyzing Multiple Phenotypes Based on Principal Component Analysis

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Acta Mathematicae Applicatae Sinica 2022年第4期38卷 843-860页

作者： De-liang BU San-guo ZHANG Na LI School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Big Data Mining and Knowledge Management Chinese Academy of SciencesBeijing 100049China LSC NCMISAcademy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China

Joint analysis of multiple phenotypes can have better interpretation of complex diseases and increase statistical power to detect more significant single nucleotide polymorphisms(SNPs)compare to traditional single phenotype analysis in genome-wide association *** component analysis(PCA),as a popular dimension reduction method,has been broadly used in the analysis of multiple *** PCA transforms the original phenotypes into principal components(PCs),it is natural to think that by analyzing these PCs,we can combine information across *** PCA-based methods can be divided into two categories,either selecting one particular PC manually or combining information from all *** this paper,we propose an adaptive principle component test(APCT)which selects and combines the PCs adaptively by using Cauchy combination *** proposed method can be seen as a generalization of traditional PCA based method since it contains two existing methods as special *** simulation shows that our method is robust and can generate powerful result in various *** real data analysis of stock mice data also demonstrate that our proposed APCT can identify significant SNPs that are missed by traditional methods.

关键词： multiple phenotypes principal component analysis cauchy combination method

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Evolution and detection of vector superradiant instabilities

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Physical Review D 2024年第8期110卷 083029页

作者： Yin-Da Guo Nayun Jia Shou-Shan Bao Hong Zhang Xin Zhang Key Laboratory of Particle Physics and Particle Irradiation (Ministry of Education) Institute of Frontier and Interdisciplinary Science Department of Physics Key Laboratory of Cosmology and Astrophysics (Liaoning) and College of Sciences Key Laboratory of Data Analytics and Optimization for Smart Industry (Ministry of Education) National Frontiers Science Center for Industrial Intelligence and Systems Optimization

Ultralight vectors can extract energy and angular momentum from a Kerr black hole (BH) due to superradiant instability, resulting in the formation of a BH-condensate system. In this work, we carefully investigate the evolution of this system numerically with multiple superradiant modes. Simple formulas are obtained to estimate important timescales, maximum masses of different modes, as well as the BH mass and spin at various times. Due to the coexistence of modes with small frequency differences, the BH-condensate system emits gravitational waves with a unique beat signature, which could be directly observed by current and projected interferometers. Besides, the current BH spin-mass data from the binary BH merger events already exclude the vector mass in the range 5×10−15 eV<μ<9×10−12 eV.

关键词： Gravitational wave sources Phenomenology Vector mesons

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Completely Distributed Design of the Disturbance Observer

Completely Distributed Design of the Disturbance Observer

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第42届中国控制会议

作者： Ganghui Cao Jinzhi Wang State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Engineering ScienceCollege of Engineering Peking University

In this paper, a distributed disturbance observer is revisited, and here attention is paid to the completely distributed design. To monitor a linear dynamical system, assume N observations are collected by a group of sensor nodes severally. N observers(collectively referred to as the distributed disturbance observer) are constructed to cooperatively estimate the states as well as the disturbance signals. However, the coupling gains of the N observers need an overall integration design. Given that some global information is not readily available, an adaptive strategy is applied to avoid using it, and therefore completely distributed.

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UniAdapter: All-in-One Control for Flexible Video Generation

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IEEE Transactions on Circuits and systems for Video Technology 2025年第6期35卷 6059-6073页

作者： Wang, Cong Hu, Panwen Zhao, Haoyu Guo, Yuanfan Gu, Jiaxi Dong, Xiao Han, Jianhua Xu, Hang Liang, Xiaodan Chinese University of Hong Kong Hong Kong School of Science and Engineering Shenzhen China Fudan University School of Computer Science and Technology Shanghai China Huawei Noah'ark Lab Shanghai201206 China Sun Yat-Sen University School of Artificial Intelligence Zhuhai Campus Zhuhai519082 China Shenzhen Campus of Sun Yat-sen University School of Intelligent Systems Engineering Guangdong No. 66 Gongchang Road Guangming District Shenzhen518107 China Peng Cheng Laboratory and Guangdong Key Laboratory of Big Data Analysis and Processing Guangzhou510006 China

Condition-based video generation aims to create video content based on given information that describes specific subjects. However, most existing works can only utilize a single condition to guide the denoising process, thereby limiting their applicability to specific scenarios. Although some works attempt to accommodate multiple conditions within one framework, they often require multiple encoders, leading to inefficiencies in integrating multi-condition features. In this work, we present a framework that, with the support of the proposed Unified Adapter (UniAdapter), enables simultaneous multi-condition control of video generation within a single model. To effectively merge these conditions, we propose a novel Probabilistic Multi-condition Concatenator (PMC) module, which employs a unified encoder to accommodate multiple conditions and concatenate condition features at the pixel level to achieve fine-grained control. Following the PMC module, we employ 2D down-sampling blocks to refine features for injection into the Video Diffusion Model (VDM). Moreover, our UniAdapter is designed to be model-agnostic and compatible with any U-Net-based VDM, offering a versatile solution for improving video generation quality. Experimental results on public benchmarks UCF-101 and MSR-VTT show that our method achieves superior results in both quantitative and qualitative evaluations. © 2025 IEEE.

关键词： Signal encoding

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A Canonical Correlation Analysis-Based Approach for Battery State of Charge Estimation

A Canonical Correlation Analysis-Based Approach for Battery ...

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第35届中国控制与决策会议

作者： Zichuan Ni Ying Yang State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Engineering ScienceCollege of EngineeringPeking University

This brief presents a novel method based on canonical correlation analysis（CCA） and particle filter（PF） for battery state of charge（SOC） *** specifically,CCA is adopted to provide a universal way for battery SOC estimation with PF for error ***,the input data are first mapped to polynomial terms before training to find the intrinsic ***,l-norm regularization is further added to the loss function in order to prevent ***,the SOC estimation result from CCA training is combined with the Coulomb counting model and updated by PF for error *** results using battery testing data at different testing profiles and temperatures show the high accuracy of estimation and robustness to wrong initial *** particular,compared with linear regression,support vector regression,and neural network,the error of the proposed method is reduced to 1.47%.

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Full-State Planning of Nonholonomic Mobile Robots via Dynamic Velocity Vector Fields

Full-State Planning of Nonholonomic Mobile Robots via Dynami...

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第35届中国控制与决策会议

作者： Xiaodong He Zhongkui Li State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Engineering ScienceCollege of EngineeringPeking University

As a rigid body,the nonholonomic mobile robot contains both states of position and *** order to plan these states simultaneously,this paper investigates the fullstate planning problem of nonholonomic mobile robots,in the sense that the robots should reach the specified positions and meanwhile point to the desired orientations at the terminal *** this end,we propose a velocity vector field which guides the mobile robots to the goal ***,the dynamics of the robot orientation is brought into the vector field,so that the attitude angle of the robot can converge to the specified value following the orientation ***,we study the obstacle avoidance and mutual-robot-collision avoidance by proposing another velocity vector field,which guides the robots moving along the tangential direction of the dangerous ***,several numerical simulation examples are provided to support the theoretical results.

关键词： Motion planning velocity vector field terminal orientation constraint nonholonomic mobile robot

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