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基于半车模型的轮毂驱动车辆簧下质量影响研究

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清华大学学报（自然科学版） 2024年第8期64卷 1445-1455页

作者：吴佩宝罗荣康俞志豪侯之超清华大学车辆与运载学院北京100084

轮毂电机驱动作为一种新型的电动汽车构型,其簧下质量过大对车辆动力学性能的影响是一个备受关注的问题。该文基于半车模型,推导了车辆平顺性典型评价指标的幅频特性和均方根值。在传统车辆模型的前后车轮上附加质量,构建轮毂电机驱动... 详细信息

轮毂电机驱动作为一种新型的电动汽车构型,其簧下质量过大对车辆动力学性能的影响是一个备受关注的问题。该文基于半车模型,推导了车辆平顺性典型评价指标的幅频特性和均方根值。在传统车辆模型的前后车轮上附加质量,构建轮毂电机驱动车辆模型,考虑车速、车身位置、电机质量及轮毂电机驱动方式等因素分别开展仿真计算。通过对比,系统分析了簧下质量增加对车辆平顺性的影响规律,并在频域中对影响机理进行了解释。结果表明,在1~50m/s(3.6~180km/h)的车速范围内,簧下质量增加同时恶化了车轮相对动载荷和悬架动挠度指标。然而,由于轴距滤波效应,簧下质量增加对车身加速度的影响则随位置改变而呈现不同的特征:前后车身加速度指标在所有车速下均被恶化,而质心加速度和俯仰角加速度指标则均随车速呈现交替恶化和改善的特点,且两个指标的变化趋势正好相反。此外,相比轮毂电机前驱和四驱布置,轮毂电机后驱布置在常用车速下引起的车辆舒适性恶化程度较小。

关键词：簧下质量车辆平顺性轴距滤波效应轮毂电机驱动方式

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应用地基雷达和机载激光雷达数据反演落叶松冠层叶面积密度

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东北林业大学学报 2024年第4期52卷 82-88页

作者：余之灏范文义东北林业大学哈尔滨150040

为了实现落叶松冠层叶面积密度盲区互补的协同反演,以塞罕坝机械林场为研究区,根据地基雷达和机载激光雷达数据对落叶松林冠层点云信息进行提取;利用点云分割算法对点云信息进行枝叶分离,并对冠层点云进行体素建模,分析落叶松林最优体... 详细信息

为了实现落叶松冠层叶面积密度盲区互补的协同反演,以塞罕坝机械林场为研究区,根据地基雷达和机载激光雷达数据对落叶松林冠层点云信息进行提取;利用点云分割算法对点云信息进行枝叶分离,并对冠层点云进行体素建模,分析落叶松林最优体素和接触频率的相关性;采用体素模型冠层分析法(VCP)分别对机载雷达和地基雷达数据绘制冠层叶面积密度曲线,实现对区域林木叶面积密度的反演。结果表明:运用冠层分析法适用于估算落叶松的叶面积密度,机载雷达点云数据和地基雷达点云数据协同估算的相对误差最小(平均相对误差1.95%),机载雷达数据估算次之(平均相对误差5.09%),地基雷达数据估算误差最大(平均相对误差9.37%)。因此,机载和地基雷达数据协同反演可以提升落叶松林叶面积密度的估算精度。

关键词：叶面积密度体素模型冠层分析法地基激光雷达机载激光雷达协同反演

利用超快光谱与可见/红外双激发荧光对长寿命振动热基态的直接观察

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Chinese Journal of Chemical Physics 2024年第2期37卷 411-419,I0070-I0087,I0105页

作者：喻琪锐李鑫茂沈成桢于志浩关键鑫郑俊荣北京大学化学与分子工程学院北京100871

在超快红外光谱测量中观察到的纳秒级弛豫诱导漂白信号被广泛认为是由于红外激发热化产生的局部热效应。本文结合超快红外泵浦/探测、二维红外光谱、可见泵浦/红外探测和超快可见/红外双共振荧光实验,发现甲醇溶液中荧光素二价阴离子的... 详细信息

在超快红外光谱测量中观察到的纳秒级弛豫诱导漂白信号被广泛认为是由于红外激发热化产生的局部热效应。本文结合超快红外泵浦/探测、二维红外光谱、可见泵浦/红外探测和超快可见/红外双共振荧光实验,发现甲醇溶液中荧光素二价阴离子的振动热基态寿命出人意料的长,能达到纳秒级.结果表明,在非线性红外实验中观察到的长寿命漂白信号在最初的几纳秒内一定存在这些热基态的重要贡献.类似的机制很可能也适用于其他分子系统,热基态的存在时间能比以往的预期长得多,有可能被应用于调控化学反应.

关键词：超快光谱荧光可见红外双激发长寿命热基态二维红外光谱泵浦-探测

Structurally coupled characteristics of rotor blade geometrically exact formulation

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Chinese Journal of Aeronautics 2022年第6期35卷 186-197页

作者： Jie WU Yijiang MA Zhidong WANG zhihao yu School of Naval Architecture & Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China College of Aerospace Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China

In rotor dynamics,blades are normally modelled as a slender beam,in which elastic deformations are coupled with each *** identify these coupling effects,new rigid-flexible structural model for helicopter rotor system is proposed in this *** rotations of the whole blade(on flapwise,lagwise,and torsional)are described as three global rigid degrees of *** nonlinear deformation geometrics of the beam is built on geometrically exact beam *** expressions for blade strain energy,kinetic energy,and virtual work of various kinds of external forces are derived as functions of finite rotations and elastic *** quantify the coupling characteristics,following the definition of coupling factor in electromagnetics,a new coupling factor between two modal components on each mode is introduced in modal *** show that the new structural model is highly capable of solving static and dynamic problems in rotor system and the maximum deformation that moderate deformation beam theory can predict might be 15%of beam *** the new coupling factor is applied to study structurally coupled characteristics of rotor blade,it can be concluded that closeness of natural frequencies likely indicates considerable coupling between corresponding DOFs in structure.

关键词： Computational geometry Flexible couplings Helicopter rotors Modal analysis Structural dynamics

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基于时间干涉的小鼠运动行为调控研究

生物医学工程学杂志 2024年第2期41卷 342-350页

作者：朱浩然槐瑞托张平丘汪慧杨俊卿殷涛于志豪邵峰山东科技大学电气与自动化工程学院山东青岛266510 山东科技大学储能技术学院山东青岛266510 青岛今墨堂生物技术有限公司山东青岛266510

时间干涉(TI)作为一种新的神经调控技术可以应用于非侵入性深部脑刺激。为了验证它在动物运动行为调控中的有效性,本文使用TI方法将包络电场聚焦到小鼠脑深部的丘脑腹后外侧核(VPL)调控左、右转运动行为。通过有限元方法分析TI在小鼠VP... 详细信息

时间干涉(TI)作为一种新的神经调控技术可以应用于非侵入性深部脑刺激。为了验证它在动物运动行为调控中的有效性,本文使用TI方法将包络电场聚焦到小鼠脑深部的丘脑腹后外侧核(VPL)调控左、右转运动行为。通过有限元方法分析TI在小鼠VPL的聚焦性,利用数值计算获得聚焦面积和体积,采用刺激器产生TI电流对小鼠VPL进行刺激,验证TI刺激方法的有效性,进一步通过c-Fos免疫荧光实验确定聚焦位置的准确性。结果表明,通过调整电极位置,当刺激电流达到800μA时,TI刺激产生的电场能够聚焦到VPL核团;小鼠能够根据刺激位置进行相应的左、右转;刺激后VPL核团c-Fos阳性细胞标记明显增加。本研究证实了TI在动物运动行为调控中的可行性,为动物机器人提供了一种对脑组织无创的刺激方法。

关键词：时间干涉行为调控丘脑腹后外侧核刺激电流

From lab to fab: path forward for 2D material electronics

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Science China(Information Sciences) 2023年第6期66卷 115-121页

作者： Hongkai NING zhihao yu Taotao LI Haoliang SHEN Gen LONG Yi SHI Xinran WANG National Laboratory of Solid State Microstructures School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced MicrostructuresNanjing University School of Integrated Circuits Nanjing University College of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications Suzhou Laboratory

The increasing demand for computation requires the development of energy-efficient logic devices with reduced dimensions. Owing to their atomic thickness, 2D semiconductors are expected to provide possible solutions at the sub-1 nm technology node. Furthermore, taking advantage of the van der Waals nature, the low-temperature back-end of line integration with silicon may occur in the near future. In this perspective, vital progress in material synthesis, device engineering, and integration technologies toward integrated circuits based on 2D materials is reviewed. The challenges and important milestones on the roadmap for the next decade toward the fab adoption of 2D materials are outlined. Particularly, performance,power, area, cost, and equipment for further technology development in this area are proposed as key metrics and enablers.

关键词： two-dimensional materials transition-metaldichalcogenides equipment integrated circuits roadmap

Two-dimensional materials for future information technology: status and prospects

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Science China(Information Sciences) 2024年第6期67卷 1-147页

作者： Hao QIU zhihao yu Tiange ZHAO Qi ZHANG Mingsheng XU Peifeng LI Taotao LI Wenzhong BAO Yang CHAI Shula CHEN Yiqi CHEN Hui-Ming CHENG Daoxin DAI Zengfeng DI Zhuo DONG Xidong DUAN yuhan FENG yu FU Jingshu GUO Pengwen GUO yue HAO Jun HE Xiao HE Jingyi HU Weida HU Zehua HU Xinyue HUANG Ziyang HUANG Ali IMRAN Ziqiang KONG Jia LI Qian LI Weisheng LI Lei LIAO Bilu LIU Can LIU Chunsen LIU Guanyu LIU Kaihui LIU Liwei LIU Sheng LIU yuan LIU Donglin LU Likuan MA Feng MIAO Zhenhua NI Jing NING Anlian PAN Tian-Ling REN Haowen SHU Litao SUN yue SUN Quanyang TAO Zi-Ao TIAN Dong WANG Hao WANG Haomin WANG Jialong WANG Junyong WANG Wenhui WANG Xingjun WANG Yeliang WANG yuwei WANG Zhenyu WANG Yao WE Department of Applied Physics The Hong Kong Polytechnic University Key Laboratory for Micro-Nano Physics and Technology of Hunan Province College of Materials Science and EngineeringHunan University College of Integrated Circuits Zhejiang University Shenzhen Geim Graphene Center Shenzhen Key Laboratory of Layered Materials for Value-Added ApplicationsTsinghua-Berkeley Shenzhen Institute & Institute of Materials ResearchTsinghua Shenzhen International Graduate SchoolTsinghua University State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZijingang CampusZhejiang University National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences CAS Key Laboratory of Nanophotonic Materials and Devices & Key Laboratory of Nanodevices and Applications i-LabSuzhou Institute of Nano-Tech and Nano-Bionics (SINANO)Chinese Academy of Sciences College of Chemistry and Chemical Engineering Hunan University Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education) Department of PhysicsRenmin University of China School of Integrated Circuits Beijing National Research Center for Information Science and Technology (BNRist)Tsinghua University School of Electronic Science and Engineering Nanjing University The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology Shaanxi Joint Key Laboratory of GrapheneSchool of MicroelectronicsXidian University Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education School of Physics and TechnologyWuhan University School of Integrated Circuits Huazhong University of Science and Technology Center for Nanochemistry (CNC) Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking University State Key Laboratory for Artificial Microstruct

Over the past 70 years, the semiconductor industry has undergone transformative changes,largely driven by the miniaturization of devices and the integration of innovative structures and materials. Two-dimensional(2D) materials like transition metal dichalcogenides(TMDs) and graphene are pivotal in overcoming the limitations of silicon-based technologies, offering innovative approaches in transistor design and functionality, enabling atomic-thin channel transistors and monolithic 3D integration. We review the important progress in the application of 2D materials in future information technology, focusing in particular on microelectronics and optoelectronics. We comprehensively summarize the key advancements across material production, characterization metrology, electronic devices, optoelectronic devices, and heterogeneous integration on silicon. A strategic roadmap and key challenges for the transition of 2D materials from basic research to industrial development are outlined. To facilitate such a transition, key technologies and tools dedicated to 2D materials must be developed to meet industrial standards, and the employment of AI in material growth, characterizations, and circuit design will be essential. It is time for academia to actively engage with industry to drive the next 10 years of 2D material research.

关键词： two-dimensional (2D) materials information technology production technology standardization of characterization microelectronicdevices optoelectronic devices multi-functional integration

Modifying the Power and Performance of 2-Dimensional MoS_(2)Field Effect Transistors

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Research 2023年第3期2023卷 741-756页

作者： Fulin Zhuo Jie Wu Binhong Li Moyang Li Chee Leong Tan Zhongzhong Luo Huabin Sun Yong Xu zhihao yu College of Integrated Circuit Science and Engineering Nanjing University of Posts and TelecommunicationsNanjing 210023China Guangdong Greater Bay Area Institute of Integrated Circuit and System Guangzhou 510535China Institute of Microelectronics Chinese Academy of SciencesBeijing 100029China College of Electronic and Optical Engineering and College of Flexible Electronics(Future Technology) Nanjing University of Posts and TelecommunicationsNanjing 210023China

Over the past 60 years,the semiconductor industry has been the core driver for the development of information technology,contributing to the birth of integrated circuits,Internet,artificial intelligence,and Internet of *** technology has been evolving in structure and material with co-optimization of performance–power–area–cost until the state-of-the-art sub-5-nm ***-dimensional(2D)semiconductors are recognized by the industry and academia as a hopeful solution to break through the quantum confinement for the future technology *** the recent 10 years,the key issues on 2D semiconductors regarding material,processing,and integration have been overcome in sequence,making 2D semiconductors already on the verge of *** this paper,the evolution of transistors is reviewed by outlining the potential of 2D semiconductors as a technological option beyond the scaled metal oxide semiconductor field-effect *** mainly focus on the optimization strategies of mobility(μ),equivalent oxide thickness(EOT),and contact resistance(RC),which enables high ON current(Ion)with reduced driving voltage(Vdd).Finally,we prospect the semiconductor technology roadmap by summarizing the technological development of 2D semiconductors over the past decade.

关键词： overcome driving enable

电场驱动复合微纳3D打印低频透明电磁屏蔽玻璃

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机械工程学报 2024年第3期60卷 305-318页

作者：台玉平朱晓阳李红珂于志浩张厚超张凡张广明赵娟赵佳伟黄友奇兰红波青岛理工大学山东省增材制造工程技术研究中心青岛266520 中国建筑材料科学研究总院有限公司北京100024

为解决大面积高性能低频透明电磁屏蔽玻璃难以低成本批量化制造的挑战性问题,提出一种基于电场驱动微喷射和电镀的复合增材制造新方法,用于制备银镍复合金属网栅低频透明电磁屏蔽玻璃,阐述了制备银镍复合金属网栅的基本原理和工艺流程;... 详细信息

为解决大面积高性能低频透明电磁屏蔽玻璃难以低成本批量化制造的挑战性问题,提出一种基于电场驱动微喷射和电镀的复合增材制造新方法,用于制备银镍复合金属网栅低频透明电磁屏蔽玻璃,阐述了制备银镍复合金属网栅的基本原理和工艺流程;通过实验揭示了主要工艺参数(打印电压、打印速度、打印气压、打印高度、电流密度、电镀时间)对制备银镍复合金属网栅电学性能、光学性能的影响规律;并结合优化的工艺参数,制备了线宽10μm、方阻0.76?/sq、网栅透过率90.2%、在低频波段(10 kHz~30 MHz)屏蔽效能大于40 dB的银镍复合金属网栅透明电磁屏蔽玻璃,复合金属网栅与衬底的黏附力为5B,实现了高屏蔽效能和高透过率电磁屏蔽金属网栅的制造,为高性能低频透明电磁屏蔽玻璃的批量化制造提供了全新的解决方案。

关键词：透明电磁屏蔽微纳3D打印复合金属网栅电场驱动喷射电镀