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CCS Chemistry 2024年第4期6卷 964-975页

作者： Xu Han Tian-Yu Sun Yi Isaac Yang Jun zhang Jing Qiu Zhaoping Xiong Nan Qiao Yun-Dong Wu Yi qin Gao Institute of Theoretical and co.putational Chemistry College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871 shenzhen Bay Laboratory Shenzhen 518132 Changping Laboratory Beijing 102200 Laboratory of Health Intelligence Huawei Cloud Computing Technologies Co.Ltd.Guizhou 550025

The bond breaking and forming in chemical reactions is a typical rare event,which is one of the difficult problems in molecular dynamics *** enhanced sampling methods have been developed to extend the time scale co.ered by molecular ***,the difficulties of obtaining appropriate co.lective variables from co.plicated reaction pathways and a co.trolled sampling over the desired phase space remain as ***,we use MetaITS,which co.bines metadynamics and integrated tempered sampling,to increase the sampling efficiency for chemical *** with co.lective variables obtained by harmonic linear discriminant analysis can efficiently decrease the main energy barrier of chemical ***,integrated tempered sampling can enhance the exploration of other degrees of *** this study,we applied the MetaITS method to two transition-metal-catalyzed organic reactions with co.plicated reaction *** simulated here a zirco.ocene-catalyzed propylene polymerization to investigate the regioselectivity and temperature *** also studied a Sharpless epoxidation reaction,for which both chiral products are observed through simulation.

关键词： molecular dynamics enhanced sampling metadynamics integrated tempering sampling propylene polymerization Sharpless epoxidation

Timely Updates in MEC-Assisted Status Update Systems: Joint Task Generation and co.putation Offloading Scheme

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china co.munications 2020年第8期17卷 168-186页

作者： Long Liu Xiaoqi qin Yunzheng Tao Zhi zhang State Key Laboratory of Network and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China huawei technologies co. LTD.Shanghai 200120China

Fresh status updates are vital to the efficient operation of network monitoring and real-time co.trol applications. In this paper, we co.sider a mobile edge co.puting(MEC)-assisted status update system, where smart devices extract valuable status updates from sensed data to achieve timely awareness of the surroundings by exploiting co.putational resources at the device and edge server. To quantify the freshness of status updates obtained by executing co.putation tasks, we employ the co.cept of age of information(Ao I) to characterize the timeliness of status updates. To co.e with the limited energy at devices, we investigate a joint task generation and co.putation offloading scheme under a given energy budget for minimizing the age of obtained status updates. The age minimization problem is modeled as a co.strained Markov decision process(CMDP). To obtain the optimal policy, we derive the structural properties of the optimal deterministic policy and propose a lightweight structure-based status update algorithm in the case of known channel statistics. Moreover, we co.sider a more realistic scenario without prior knowledge of channel statistics, and propose a Q-learning-based status update algorithm to make online decisions. Simulation results show that the performance of our proposed algorithms is co.petitive when co.pared with existing schemes.

关键词： mobile edge co.puting age of information co.strained Markov decision process structural analysis Q-learning

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组织弹性的概念界定与量表开发

东北大学学报（自然科学版） 2020年第10期41卷 1491-1499页

作者：张兰霞王乐乐张钦贾明媚东北大学工商管理学院辽宁沈阳110169 华为技术有限公司全球HR共享服务中心贵州贵阳550081

通过对已有相关理论和文献的整理、归纳,界定了组织弹性的概念,并通过开放式问卷调查收集质性资料.采用扎根理论探究组织弹性的结构,提炼出组织对内弹性和组织对外弹性两个维度,据此编制组织弹性的初始量表.并采用项目分析、探索性因子... 详细信息

通过对已有相关理论和文献的整理、归纳,界定了组织弹性的概念,并通过开放式问卷调查收集质性资料.采用扎根理论探究组织弹性的结构,提炼出组织对内弹性和组织对外弹性两个维度,据此编制组织弹性的初始量表.并采用项目分析、探索性因子分析及验证性因子分析对量表进行修订和验证,最终获得包含15个题项并具有良好信度和效度的组织弹性测量量表,为后续研究奠定了基础.

关键词：组织弹性组织对内弹性组织对外弹性概念界定量表开发

co.packaged optics(CPO):status,challenges,and solutions

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Frontiers of Optoelectronics 2023年第1期16卷 1-40页

作者： Min Tan Jiang Xu Siyang Liu Junbo Feng Hua zhang Chaonan Yao Shixi Chen Hangyu Guo Gengshi Han Zhanhao Wen Bao Chen Yu He Xuqiang Zheng Da Ming Yaowen Tu Qiang Fu Nan Qi Dan Li Li Geng Song Wen Fenghe Yang Huimin He Fengman Liu Haiyun Xue Yuhang Wang Ciyuan Qiu Guangcan Mi Yanbo Li Tianhai Chang Mingche Lai Luo zhang qinfen Hao Mengyuan qin School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Department of Electronic and co.puter Engineering The Hong Kong University of Science and TechnologyHong KongChina HKUST Fok Ying Tung Research Institute Guangzhou 511462China The Hong Kong University of Science and Technology(Guangzhou) Guangzhou 511462China Chongqing United Micro-Electronics Center(CUMEC) Chongqing 401332China Hisense Broadband Multimedia technologies co. Ltd.Qingdao 266000China Institute of Microelectronics Chinese Academy of SciencesBeijing 100029China State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China School of Microelectronics Xi’an Jiaotong UniversityXi’an 710049China zhangjiang Laboratory Shanghai 201210China The State Key Laboratory of Advanced Optical co.munication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China huawei technologies co. Ltd.Shenzhen 440307China co.lege of co.puter National University of Defense TechnologyChangsha 410073China Institute of co.puting Technology Chinese Academy of SciencesBeijing 100086China

Due to the rise of 5G,IoT,AI,and high-performance co.puting applications,datacenter trafc has grown at a co.pound annual growth rate of nearly 30%.Furthermore,nearly three-fourths of the datacenter trafc resides within *** co.ventional pluggable optics increases at a much slower rate than that of datacenter *** gap between application requirements and the capability of co.ventional pluggable optics keeps increasing,a trend that is *** optics(CPO)is a disruptive approach to increasing the interco.necting bandwidth density and energy efciency by dramatically shortening the electrical link length through advanced packaging and co.optimization of electronics and *** is widely regarded as a promising solution for future datacenter interco.nections,and silico. platform is the most promising platform for large-scale *** international co.panies(e.g.,Intel,Broadco. and IBM)have heavily investigated in CPO technology,an inter-disciplinary research feld that involves photonic devices,integrated circuits design,packaging,photonic device modeling,electronic-photonic co.simulation,applications,and *** review aims to provide the readers a co.prehensive overview of the state-of-the-art progress of CPO in silico. platform,identify the key challenges,and point out the potential solutions,hoping to enco.rage co.laboration between diferent research felds to accelerate the development of CPO technology.

关键词： co.packaged optics Silico. photonics High-performance co.puting Advanced packaging External laser Optical power delivery co.simulation Standardization Transmitter Receiver

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基于机器视觉的路边垃圾分类系统

传感器与微系统 2023年第6期42卷 82-85,89页

作者：党宏社李俊达郭琴张选德曾浩陕西科技大学电气与控制工程学院陕西西安710021 西安西瑞控制技术股份有限公司陕西西安710021 陕西科技大学电子信息与人工智能学院陕西西安710021

基于机器视觉技术设计制作了路边垃圾分类系统,主要包括硬件电路和垃圾识别模型。改进了现有多注意力模块,使模型更轻量化,采用H-Swish激活函数提高识别准确率,然后在公开的华为垃圾分类比赛数据集上进行仿真实验。结果表明:该方法识别... 详细信息

基于机器视觉技术设计制作了路边垃圾分类系统,主要包括硬件电路和垃圾识别模型。改进了现有多注意力模块,使模型更轻量化,采用H-Swish激活函数提高识别准确率,然后在公开的华为垃圾分类比赛数据集上进行仿真实验。结果表明:该方法识别准确率达到87.35%。针对自建数据集数据量少、过拟合严重的问题,采用迁移学习的方法,将在华为数据集上训练完成的模型参数进行迁移,在自建数据集上继续训练。最后,将模型部署到树莓派4B上,在制作的实物平台上进行测试。结果表明:该系统平均一次回收需要2 s,可以有效地进行路边垃圾识别分类。

关键词：路边垃圾分类图像识别注意力模块

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开源软件供应链安全研究综述

软件学报 2023年第3期34卷 1330-1364页

作者：纪守领王琴应陈安莹赵彬彬叶童张旭鸿吴敬征李昀尹建伟武延军浙江大学计算机科学与技术学院浙江杭州310007 浙江大学滨江研究院浙江杭州310053 中国科学院软件研究所智能软件研究中心北京100190 上海华为技术有限公司上海201206

随着近年来开源软件的蓬勃发展,现代化软件的开发和供应模式极大地促进了开源软件自身的快速迭代和演进,也提高了社会效益.新兴的开源协作的软件开发模式,使得软件开发供应流程由较为单一的线条转变为复杂的网络形态.在盘根错节的开源... 详细信息

随着近年来开源软件的蓬勃发展,现代化软件的开发和供应模式极大地促进了开源软件自身的快速迭代和演进,也提高了社会效益.新兴的开源协作的软件开发模式,使得软件开发供应流程由较为单一的线条转变为复杂的网络形态.在盘根错节的开源软件供应关系中,总体安全风险趋势显著上升,日益受到学术界和产业界的重视.针对开源软件供应链,厘清了其关键环节,基于近10年的攻击事件,归纳了开源软件供应链的威胁模型和安全趋势,并通过对现有安全研究成果的调研分析,从风险识别和加固防御这两个方面总结了开源软件供应链安全的研究现状,最后对开源软件供应链安全所面临的挑战和未来研究方向进行了展望和总结.

关键词：开源软件供应链风险识别风险管理安全加固

国家标准项目《信息安全技术机密计算通用框架》试点实践

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china Standardization 2023年第S1期 52-56页

作者：王惠莅邱勤庞婷葛小宇张高山 china Electronics Standardization Institute china Mobile co.munications Group co. Ltd. huawei technologies co. Ltd. china Mobile co.munications Group Design Institute co. Ltd.

Data security and privacy protection have beco.e the focus of cybersecurity protection in many *** utilization of co.fidential co.puting technology can significantly enhance data ***,there are a variety of co.fidential co.puting technology routes,with significant differences in the principles and interfaces of *** is an urgent need to develop relevant standards and specifications and guide the design,development,deployment and application of co.fidential co.puting related *** paper introduces the development progress of the national standard project“Information security techniques—General framework for the co.fidential co.puting”and its pilot application scenarios across various ***,it proposes suggestions on modifying and improving the standard to promote the healthy development of the co.fidential co.puting industry eco.ystem.

关键词： cybersecurity data security privacy protection co.fidential co.puting