作者: 于嘉瑞1;岳宝增1;李晓玉2 (1北京理工大学宇航学院, 北京, 100081;2北京遥感设备研究所, 北京, 100854)
出处: 力学学报 2023 第55卷 第2期 P476-486
关键词: 刚-液-柔耦合航天器;液体大幅晃动;等几何分析;水平集方法;柔性附件
摘要: 现代航天器肩负许多周期长且复杂的航天任务,通常需要携带大量的液体燃料.贮箱中液体燃料大幅晃动会严重影响航天器的姿态稳定性和控制精度,是现代航天器耦合动力学建模和精确控制研究的重要问题.本文提出了一种新的液体大幅晃动数值仿真方法,采用等几何分析方法对贮箱内气体和液体整体进行建模和空间离散,采用压力修正 ...
作者: Luo Yan1;Jiang Yaozhu1;Chen Linhao1;Li Chun1,2;Wang Ying1 (1Institute of Biochemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, MIIT, Beijing;2Department of Chemical Engineering, Tsinghua University, Key Laboratory for Industrial Biocatalysis, Ministry of Education, Beijing)
出处: Synthetic and Systems Biotechnology 2023 第8卷 第1期 P20-32
关键词: Oxidosqualene cyclase;Cytochrome P450;UDP-Glycosyltransferase;Triterpenoids;Protein engineering
摘要: Triterpenoids are a class of natural products widely used in fields related to medicine and health due to their biological activities such as hepatopr ...
作者: Ma Huichen1;Zhou Junjie1,2 (1School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081;2Institute of Advanced Technology, Beijing Institute of Technology, Ji'nan, 250101)
出处: Acta Mechanica Solida Sinica 2023 第36卷 第1期 P1-12
关键词: Plate bending theory;Soft actuator;Modeling;Bionic application
摘要: Soft bellows-type pneumatic actuators (SBPAs), which consist of two cavities with small chambers embedded in elastomeric structures, are an essential ...
作者: Sun Hao1,2,3;Gao Xin4;Guo LiangYan5;Tao LuQi6;Guo Zi Hao2;Shao Yangshi2;Cui Tianrui1;Yang Yi1;Pu Xiong2;Ren TianLing1 (1Institute of Microelectronics and Tsinghua University, Beijing National Research Center for Information Science and Technology (BNRist), Beijing;2Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, CAS Center for Excellence in Nanoscience;;Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing;3School of Electrical Engineering, Chongqing University, State Key Laboratory of Power Transmission Equipment and System Security an, Chongqing;4School of Computer Science & Technology, Beijing Institute of Technology, Beijing;5School of Electrical Engineering, Chongqing University, State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing;6School of Automation and Electrical Engineering, University of Science and Technology Beijing, Beijing)
出处: InfoMat 2023 第5卷 第2期 Pe12385
关键词: human-robot interface;laser-induced graphene;machine learning;thermoacoustic;triboelectric nanogenerator
摘要: Human-robot interface (HRI) electronics are critical for realizing robotic intelligence. Here, we report graphene-based dual-function acoustic transdu ...
作者: Cai Ran1;Bao Lixia2;Zhang Wenqi3;Xia Weiwei4;Sun Chunhao5;Dong Weikang2;Chang Xiaoxue2;Hua Ze2;Shao Ruiwen1;Fukuda Toshio1;Sun Zhefei6;Liu Haodong7;Zhang Qiaobao6;Xu Feng8;Dong Lixin3 (1School of Medical Technology,Beijing Institute of Technology, Beijing Advanced Innovation Center for Intelligent Robots and Systems, Beijing;2Analysis & Testing Center,Beijing Institute of Technology, Beijing;3Department of Biomedical Engineering,City University of Hong Kong, Hong Kong;4Shaanxi Materials Analysis and Research Center,School of Materials Science and Engineering,Northwestern Polytechnical University, Xi'an;5School of Environmental and Safety Engineering,North University of China, Taiyuan;6Department of Materials Science and Engineering,College of Materials,Xiamen University, Fujian, Xiamen;7Department of Nanoengineering,University of California San Diego, USA, La Jolla;8SEU-FEI Nano-Pico Center,Southeast University, Key Laboratory of MEMS of Ministry of Education, Nanjing)
出处: InfoMat 2023 第5卷 第1期 Pe12364
关键词: in situ transmission electron microscopy;potassium-ion batteries;potassium-ion storage mechanism;size-dependent effects;tetragonal FeSe
摘要: Potassium-ion batteries (PIBs) are considered promising alternatives to lithiumion batteries owing to cost-effective potassium resources and a suitabl ...
作者: 李元章,马煜杰,孙海鹏,张正 (北京理工大学计算机学院)
出处: 信息网络安全 2023 第23卷 第4期 P1-9
关键词: 代码混淆;协同混淆;JavaScript语言;软件可维护性指数
摘要: 代码混淆是一种对软件代码的保护技术,通过提高代码逻辑的分析难度对软件进行加固。目前,针对代码混淆的研究主要集中在单一的新混淆方法的提出及其效果分析,针对多种混淆方法进行协同混淆的研究较少。针对此问题,文章提出一种基于强度导向的JavaScript代码协同混淆方法,首先对参与混淆的多种独立混淆方法进行 ...
作者: 胡建明,王字满,李志爽 (北京理工大学机械与车辆学院)
出处: 排灌机械工程学报 2023 第41卷 第4期 P393-399,416
关键词: 空化气泡;刚性壁面;自由液面;边界效应;射流
摘要: 为了揭示空泡在复杂边界条件作用下的动态演变机制,以电容器在水中放电产生的气泡为研究对象,通过对气泡的溃灭时间、迁移距离和水柱高度等动态特性参数进行定量分析,得到了边界效应对气泡发展的影响规律.结果表明,气泡在射流阶段、射流击穿气泡和回弹3个阶段气泡形态变化剧烈;多边界条件下,竖直刚性边界影响气泡内部 ...
作者: 杨妮1;,苏岳锋1,2;,王联1;,李宁1,2;,马亮2;,朱晨3; (1北京理工大学重庆创新中心;2北京理工大学;3北京大学)
出处: 储能科学与技术 2023 第12卷 第4期 P1283-1294
关键词: 锂离子电池;聚焦离子束;三维重构;冷冻加工技术
摘要: 电极材料作为锂离子电池的关键结构组成部分,其结构稳定性直接决定着锂离子电池的电化学性能。由于电极材料具有对空气、水分敏感,不耐电子束辐照等特性,且在充放电过程中,电极本身及其所处化学环境不断变化,表征其微观组织形貌和结构具有挑战性。聚焦离子束-扫描电子显微镜作为重要的微纳米尺度精细加工设备,是制备透 ...
作者: 刘国栋,冯立辉,卢继华,崔建民 (北京理工大学光电学院;北京理工大学集成电路与电子学院)
出处: 激光与光电子学进展 2023 第4期 P56-66
关键词: 海洋光学;图像阈值分类;颜色均衡;光学模型参数估计;峰值信噪比;水下彩色图像质量评价
摘要: 为了解决水下图像在复杂水体中表现的画面模糊和颜色失真的问题,提出了一种基于HSV分类、CIELAB均衡与最小卷积区域暗通道先验(DCP)的水下图像恢复算法。基于H与S阈值将水下图像分为高饱和度失真图像、低饱和度失真图像及浅水图像等3类。分类后的水下图像分别经CIELAB均衡及自适应图像增强恢复,其中 ...
作者: 高飞,刘玉鑫 (北京理工大学物理学院;北京大学物理学院)
出处: 核技术 2023 第4期
关键词: QCD相变;手征对称性动力学破缺;解禁闭;戴森-施温格方程;手征磁化率
摘要: 量子色动力学(Quantum Chromodynamics,QCD)在有限温度有限密度平面内具有丰富的相结构,关于相边界曲线、临界终点(Critical Endpoint,CEP)的位置以及各相的热力学性质、状态方程等的研究是目前理论和实验上的重点问题,寻找QCD相变信号,特别是确定CEP的位置,成 ...
已保存题录(0)