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A social computing method for energy safety

Journal of Safety Science and Resilience 2024年第1期5卷 64-82页

作者： Pengfei Zhao Shuangqi Li Zhidong Cao Paul Jen-Hwa Hu Daniel Dajun Zeng Da Xie yichen shen Jiangfeng Li Tianyi Luo Institute of Automation Chinese Academy of SciencesUniversity of Chinese Academy of SciencesBeijing 100090China Systems Engineering Cornell UniversityIthacaNY 14853USA David Eccles School of Business the University of UtahUtahUSA Department of Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240China China University of Mining and Technology China

Information and communication technologies enable the transformation of traditional energy systems into cyber-physical energy systems(CPESs),but such systems have also become popular targets of ***,available methods for evaluating the impacts of cyberattacks suffer from limited resilience,efficacy,and practical *** mitigate their potentially disastrous consequences,this study suggests a two-stage,discrepancy-based optimization approach that considers both preparatory actions and response measures,integrating concepts from social *** proposed Kullback-Leibler divergence-based,distributionally robust optimization(KDR)method has a hierarchical,two-stage objective function that incorporates the operating costs of both system infrastructures(e.g.,energy resources,reserve capacity)and real-time response measures(e.g.,load shedding,demand-side management,electric vehicle charging station management).By incorporating social computing principles,the optimization framework can also capture the social behavior and interactions of energy consumers in response to *** preparatory stage entails day-ahead operational decisions,leveraging insights from social computing to model and predict the behaviors of individuals and communities affected by potential *** mitigation stage generates responses designed to contain the consequences of the attack by directing and optimizing energy use from the demand side,taking into account the social context and preferences of energy consumers,to ensure resilient,economically efficient CPES *** method can determine optimal schemes in both stages,accounting for the social dimensions of the *** original disaster mitigation model uses an abstract formulation to develop a risk-neutral model that characterizes cyberattacks through KDR,incorporating social computing techniques to enhance the understanding and response to cyber *** approach can mitigate the impacts more

关键词： Cyberattacks Cyber-physical energy systems Distributionally robust optimization False data injections Two-stage modeling Social computing

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Role of Intraseasonal Oscillation in a Compound Drought and Heat Event over the Middle of the Yangtze River Basin during Midsummer 2018

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Journal of Meteorological Research 2022年第4期36卷 643-657页

作者： Chuhan LU yichen shen Yonghua LI Bo XIANG Yujing QIN Key Laboratory of Meteorological Disaster Ministry of EducationNanjing University of Information Science&TechnologyNanjing 210044 Chongqing Climate Center Chongqing 401147

In late July 2018, a compound drought and heat event(CDHE) occurred in the middle of the Yangtze River basin(MYRB) and caused great damage to the national economy. The CDHE over the MYRB has been documented to be linked with intraseasonal oscillations(ISOs) from different regions. However, specific roles of different ISOs on the development of the CDHE cannot be separated in the observational analysis. By using partial lateral forcing experiments driven by ISO in the Weather Research and Forecasting(WRF) model, we found that the midlatitude ISO generated by a westerly wave train in the upper troposphere played an important role in this heatwave and drought event in the northern MYRB, causing a regional average temperature rise of 1.65°C and intensification of drought over23.49% of the MYRB area. On the other hand, the ISO associated with the Pacific-Japan(PJ)-like teleconnection wave train in the lower troposphere induced a more pronounced impact on the event, causing an average temperature rise of 2.44°C, intensifying drought over 29.62% of the MYRB area. The MYRB was mainly affected by northward warm advection driven by the westward extension of the western North Pacific subtropical high in the early period of the CDHE development. In the late period, because of the establishment of a deep positive geopotential height field through the troposphere leading to intensive local subsidence, there was a remarkable temperature rise and moisture decrease in the MYRB. The results will facilitate a better understanding of the occurrence of CDHE and provide empirical precursory signals for subseasonal forecast of CDHE.

关键词： partial lateral forcing experiment compound drought and heat event meteorological drought composite index(MCI) middle of the Yangtze River basin(MYRB)

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Comprehensive pathogenesis and clinical therapy in striae distensae: An overview and current perspective

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Chinese Journal Of Plastic and Reconstructive Surgery 2022年第4期4卷 203-207页

作者： yichen shen Qianqian Pang Jinghong Xu Department of Plastic Surgery The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003ZhejiangChina Department of Plastic Surgery Hwa Mei HospitalUniversity of Chinese Academy of SciencesNingbo 315010ZhejiangChina

The pathogenesis of striae distensae(SD) is complicated and has not yet been fully elucidated. Hormonal changes,overstretched skin, and structural and functional changes in the skin may be crucial factors in the development of SD. Therapy aims to stimulate dermal collagen synthesis and improve skin texture. Mainstream treatments include topical medications, chemical peeling, laser and radiofrequency therapy, microdermabrasion, microneedle therapy, and filler injection therapy. In the present review, we summarize current perspectives on the pathogenesis and clinical therapy of SD.

关键词： Striae distensae Pathogenesis Clinical therapy

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Photonic matrix multiplication lights up photonicaccelerator and beyond

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Light(Science & Applications) 2022年第2期11卷 158-178页

作者： Hailong Zhou Jianji Dong Junwei Cheng Wenchan Dong Chaoran Huang yichen shen Qiming Zhang Min Gu Chao Qian Hongsheng Chen Zhichao Ruan Xinliang Zhang Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Department of Electronic Engineering The Chinese University of Hong KongShatinHong KongChina Lightelligence Hangzhou 311121China Institute of Photonic Chips University of Shanghai for Science and TechnologyShanghai 200093China Centre for Artificial-Intelligence Nanophotonics School of Optical-Electrical and Computer EngineeringUniversity of Shanghai for Science and TechnologyShanghai 200093China Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical InstrumentationZJUHangzhou Global Scientific and Technological Innovation CenterZJU-UIUC InstituteZhejiang UniversityHangzhou 310027China Interdisciplinary Center of Quantum Information State Key Laboratory of Modern Optical Instrumentationand Zhejiang Province Key Laboratory of Quantum Technology and DeviceDepartment of PhysicsZhejiang UniversityHangzhou 310027China

Matrix computation,as a fundamental building block of information processing in science and technology,contributes most of the computational overheads in modern signal processing and artificial intelligence *** accelerators are designed to accelerate specific categories of computing in the optical domain,especially matrix multiplication,to address the growing demand for computing resources and *** matrix multiplication has much potential to expand the domain of telecommunication,and artificial intelligence benefiting from its superior *** research in photonic matrix multiplication has flourished and may provide opportunities to develop applications that are unachievable at present by conventional electronic *** this review,we first introduce the methods of photonic matrix multiplication,mainly including the plane light conversion method,Mach–Zehnder interferometer method and wavelength division multiplexing *** also summarize the developmental milestones of photonic matrix multiplication and the related ***,we review their detailed advances in applications to optical signal processing and artificial neural networks in recent ***,we comment on the challenges and perspectives of photonic matrix multiplication and photonic acceleration.

关键词： interferometer beyond matrix

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脑卒中患者社会疏离感影响因素文献计量学分析

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中国初级卫生保健 2024年第2期38卷 34-37页

作者：于慧敏王伟刘静沈亦忱叶丽萍严非复旦大学公共卫生学院/国家卫生健康委员会卫生技术评估重点实验室上海200032 复旦大学附属闵行医院/上海市闵行区中心医院/复旦大学公共卫生学院闵行分院上海201199

目的:系统归纳影响脑卒中患者社会疏离感的因素,为采取针对性的干预措施提供参考,促进患者及早康复和回归社会。方法:利用计算机检索中英文文献数据库,检索时间为建库至2023年3月。由2名研究员独立筛选文献、提取资料和进行质量评价,归... 详细信息

目的:系统归纳影响脑卒中患者社会疏离感的因素,为采取针对性的干预措施提供参考,促进患者及早康复和回归社会。方法:利用计算机检索中英文文献数据库,检索时间为建库至2023年3月。由2名研究员独立筛选文献、提取资料和进行质量评价,归纳与总结纳入研究的基本情况与结果。结果:共纳入14项研究,涉及年龄、文化程度、抑郁、病耻感、社会支持、脑卒中史等29个影响因素,并将其归为个人因素、心理因素、社会因素及疾病因素4大类。结论:影响脑卒中社会疏离水平的主要因素有家庭月收入、病耻感、社会支持、脑卒中史,次要因素有居住地、抑郁、自我效能、心理弹性、症状负担、神经功能缺陷、日常生活活动能力、合并慢性病情况。其他尚存在争议的影响因素未来需开展更多高质量研究予以验证。

关键词：脑卒中社会疏离影响因素计量学分析

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Photonic integrated neuro-synaptic core for convolutional spiking neural network

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Opto-Electronic Advances 2023年第11期6卷 29-42页

作者： Shuiying Xiang Yuechun Shi Yahui Zhang Xingxing Guo Ling Zheng Yanan Han Yuna Zhang Ziwei Song Dianzhuang Zheng Tao Zhang Hailing Wang Xiaojun Zhu Xiangfei Chen Min Qiu yichen shen Wanhua Zheng Yue Hao State Key Laboratory of Integrated Service Networks State Key Discipline Laboratory of Wide Bandgap Semiconductor TechnologyXidian UniversityXi’an 710071China Yongjiang Laboratory No.1792 Cihai South RoadNingbo 315202China The School of Communications and Information Engineering Xi’an University of Posts and TelecommunicationsXi’an 710121China Laboratory of Solid-State Optoelectronics Information Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China School of Information Science and Technology Nantong UniversityNantong 226019China The College of Engineering and Applied Sciences Nanjing UniversityNanjing 210023China Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake UniversityHangzhou 310024China Lightelligence Group Hangzhou 311121China

Neuromorphic photonic computing has emerged as a competitive computing paradigm to overcome the bottlenecks of the von-Neumann *** weighting and nonlinear spike activation are two fundamental functions of a photonic spiking neural network(PSNN).However,they are separately implemented with different photonic materials and devices,hindering the large-scale integration of ***,we propose,fabricate and experimentally demonstrate a photonic neuro-synaptic chip enabling the simultaneous implementation of linear weighting and nonlinear spike activation based on a distributed feedback(DFB)laser with a saturable absorber(DFB-SA).A prototypical system is experimentally constructed to demonstrate the parallel weighted function and nonlinear spike ***,a fourchannel DFB-SA laser array is fabricated for realizing matrix convolution of a spiking convolutional neural network,achieving a recognition accuracy of 87%for the MNIST *** fabricated neuro-synaptic chip offers a fundamental building block to construct the large-scale integrated PSNN chip.

关键词： neuromorphic computation photonic spiking neuron photonic integrated DFB-SA array convolutional spiking neural network

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Versatile photonic molecule switch in multimode microresonators

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Light(Science & Applications) 2024年第3期13卷 498-509页

作者： Zihan Tao Bitao shen Wencan Li Luwen Xing Haoyu Wang yichen Wu Yuansheng Tao Yan Zhou Yandong He Chao Peng Haowen Shu Xingjun Wang State Key Laboratory of Advanced Optical Communications System and Networks School of ElectronicsPeking UniversityBeijing 100871China College of Engineering Peking UniversityBeijing 100871China School of Integrated Circuits Peking University100871 BejingChina Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China Frontiers Science Center for Nano-optoelectronics Peking UniversityBeijing 100871China Peng Cheng Laboratory Shenzhen 518055China

Harnessing optical supermode interaction to construct artificial photonic molecules has uncovered a series of fundamental optical phenomena analogous to atomic ***,the distinct energy levels and interactions in such two-level systems were provided by coupled *** reconfigurability is limited,as they often require delicate external field stimuli or mechanically altering the geometric *** highly specific approaches also limit potential ***,we propose a versatile on-chip photonic molecule in a multimode microring,utilizing a flexible regulation methodology to dynamically control the existence and interaction strength of spatial *** transition between single/multi-mode states enables the“switched-off/on”functionality of the photonic molecule,supporting wider generalized applications *** particular,“switched-on”state shows flexible and multidimensional mode splitting control in aspects of both coupling strength and phase difference,equivalent to the *** *** effect.“Switched-off”state allows for perfect low-loss single-mode transition(Qi~10 million)under an ultra-compact bend size(FSR~115 GHz)in a foundry-based silicon *** breaks the stereotyped image of the FSR-Q factor trade-off,enabling ultra-wideband and high-resolution millimeter-wave photonic *** demonstration provides a flexible and portable solution for the integrated photonic molecule system,extending its research scope from fundamental physics to real-world applications such as nonlinear optical signal processing and sixth-generation wireless communication.

关键词： switched multimode millimeter

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CAV driving safety monitoring and warning via V2X-based edge computing system

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Frontiers of Engineering Management 2024年第1期11卷 107-127页

作者： Cheng CHANG Jiawei ZHANG Kunpeng ZHANG yichen ZHENG Mengkai SHI Jianming HU shen LI Li LI Department of Automation Tsinghua UniversityBeijing 100084China College of Electrical Engineering Henan University of TechnologyZhengzhou 450001China Nebula Link Technology Co. Ltd.Beijing 100080China Department of Civil Engineering Tsinghua UniversityBeijing 100084China

Driving safety and accident prevention are attracting increasing global *** safety monitoring systems often face challenges such as limited spatiotemporal coverage and accuracy,leading to delays in alerting drivers about potential *** study explores the use of edge computing for monitoring vehicle motion and issuing accident warnings,such as lane departures and vehicle *** traditional systems that depend on data from single vehicles,the cooperative vehicle-infrastructure system collects data directly from connected and automated vehicles(CAVs)via vehicle-to-everything *** approach facilitates a comprehensive assessment of each vehicle’s *** propose algorithms and specific data structures for evaluating accident risks associated with different ***,we examine the prerequisites for data accuracy and transmission delay to enhance the safety of CAV *** efficacy of this framework is validated through both simulated and real-world road tests,proving its utility in diverse driving conditions.

关键词： driving safety accident prevention connected and automated vehicles edge computing

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Long-term complications after liquid silicone injection:A case report and literature review

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Chinese Journal Of Plastic and Reconstructive Surgery 2021年第4期3卷 189-192页

作者： yichen shen Qianqian Pang Jinghong Xu Department of Plastic Surgery The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310009ZhejiangChina

Liquid silicone injection for cosmetic purposes has a long and notorious ***,reports of delayed and extensive lesions are ***,we report a case of long-term complications after the use of liquid silicone materials for the correction of facial *** this case,the complications of foreign body granulomas and unique silicone nodules lasting for more than 10 years were *** silicone injection can induce delayed adverse reactions,which are difficult to *** case presents the successful surgical treatment of a mass injection of liquid *** focus of treatment should be to remove the injected material and degenerated tissue as much as possible while protecting normal tissue and its *** open reconstructive surgery with an appropriate incision,postoperative scars can be ***,both functional and aesthetic outcomes can be achieved.

关键词： Facial filler Liquid silicone Delayed complications Foreign body granulomas

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齿面硬化层对重载齿轮力学性能的影响研究

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制造技术与机床 2022年第7期 152-157页

作者：沈益晨陈启东苏州大学机电工程学院江苏苏州215000 常熟理工学院机械工程学院江苏常熟215500

重载齿轮在生产过程中会对表面硬化处理以提高整体性能,然而现有的分析方法多数将齿面视作均匀材料,并没有考虑硬化层产生的影响。文章提出一种齿面硬化层结构分层状、材料属性幂函数渐变的齿轮实体建模方法,基于赫兹接触理论基础,通过... 详细信息

重载齿轮在生产过程中会对表面硬化处理以提高整体性能,然而现有的分析方法多数将齿面视作均匀材料,并没有考虑硬化层产生的影响。文章提出一种齿面硬化层结构分层状、材料属性幂函数渐变的齿轮实体建模方法,基于赫兹接触理论基础,通过建立有限元数值模型,研究齿面硬化层对重载齿轮应力场的影响。结果表明:通过该建模方法,啮合应力场更接近理论解;合理的硬化层分布指数不仅能有效降低齿轮应力而且可以提高结合强度;硬化层厚度对接触应力影响较大,当厚度在1~1.5 mm时,齿轮应力场分布最合理。

关键词：表面硬化重载齿轮力学性能有限元分析

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