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Direct ink writing of multifunctional gratings with gel-like MXene/norepinephrine ink for dynamic electromagnetic interference shielding and patterned Joule heating

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Nano Research 2024年第3期17卷 1585-1594页

作者： Pei-Zhu Jiang Zhiming deng Peng Min Lvxuan Ye cheng-zhang Qi Hao-yu Zhao Ji Liu Hao-Bin zhang Zhong-Zhen yu beijing key laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029China state key laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China School of Chemistry CRANN and AMBERTrinity College DublinDublin D02PN40Ireland

intelligent electromagnetic interference(EMI)shielding modulators with a wide tuning range and cyclic stability are urgently needed but their fabrication remains challenging.A gel-like MXene/norepinephrine ink is developed and multifunctional MXene gratings with wide EMI shielding effectiveness(SE)tuning range,superior reversibility,and high mechanical flexibility are constructed by direct ink writing approach for dynamic EMI shielding and patterned Joule heating *** modulable MXene/norepinephrine grating with a high conductivity of 3510 S·cm-1 can conveniently realize the seamless modulation of the EMI SE by adjusting the angle between the MXene grating filaments and the electric field of the incident electromagnetic waves,offering highly reversible switching between shielding“On”(28.0 dB)and“Off”(0.5 dB)***,due to the optimized integration of the MXene ink and the rationally designed pattern,a superior specific EMI SE of 95,688.2 dB·cm^(2)·g^(-1) is achieved in the“On”***,the MXene/norepinephrine ink can be used to fabricate many complex patterned gratings with superior stability,instant responsibility,and superb mechanical flexibility,exhibiting a unique patterned Joule heating *** writing of multifunctional gratings paves a means for developing intelligent EMI shielding materials,wearable electronic devices,and advanced thermal management materials.

关键词： MXene ink direct ink writing electromagnetic interference shielding multifunctional gratings Joule heating

使用深度学习在CTA扫描卷下实现主动脉夹层分类和直径测量的双功能系统

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Engineering 2024年第3期34卷 83-91页

作者： Zhihui Huang Rui Wang Hui yu Yifan Xu cheng cheng Guangwei Wang Haosen Cao Xiang Wei Hai-Tao zhang School of Artificial Intelligence and Automation&the MOE Engineering Research Center of Autonomous intelligent Unmanned systems&the state key laboratory of intelligent Manufacturing Equipment and technology Huazhong University of Science and TechnologyWuhan 430074China Division of Cardiovascular Surgery Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Wuhan Children’s Hospital:Wuhan Women and Children Medical Care Center Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430010China

Acute aortic dissection is one of the most life-threatening cardiovascular diseases,with a high mortality *** prevalence ranges from 0.2%to 0.8%in humans,resulting in a significant number of deaths due to being missed in manual *** importantly,the aortic diameter—a critical indicator for surgical selection—significantly influences the outcomes of surgeries ***,it is an urgent yet challenging mission to develop an automatic aortic dissection diagnostic system that can recognize and classify the aortic dissection type and measure the aortic *** paper offers a dual-functional deep learning system called aortic dissections diagnosis-aiding system(DDAsys)that enables both accurate classification of aortic dissection and precise diameter measurement of the *** this end,we created a dataset containing 61190 computed tomography angiography(CTA)images from 279 patients from the Division of Cardiovascular Surgery at Tongji Hospital,Wuhan,*** dataset provides a slice-level summary of difficult-to-identify features,which helps to improve the accuracy of both recognition and *** system achieves a recognition F1 score of 0.984,an average classification F1 score of 0.935,and the respective measurement precisions for ascending and descending aortic diameters are 0.994 mm and 0.767 mm root mean square error(RMSE).The high consistency(88.6%)between the recommended surgical treatments and the actual corresponding surgeries verifies the capability of our system to aid clinicians in developing a more prompt,precise,and consistent treatment strategy.

关键词： Aortic dissections Computed tomography angiography Classification Deep learning

A novel neuroprotective method against ischemic stroke by accelerating the drainage of brain interstitial fluid

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science china(Life sciences) 2024年第10期67卷 2213-2223页

作者： Jingge Lian Liu Yang Hanbo Tan Shaoyi Su Leonor Serrano Lopes Fangxiao cheng Junhao Yan yu Fu Wanyi Fu Zhaoheng Xie Jianfei Sun Jicong zhang Zhiqian Tong Yajuan Gao Hongbin Han department of Radiology Peking University Third HospitalBeijing 100191China beijing key laboratory of Magnetic Resonance Imaging technology Beijing 100191China Institute of Medical technology Peking University Health Science CenterBeijing 100191China department of Informatics Technical University of MunichGarching 80539Germany department of Anatomy and Histology School of Basic Medical SciencesPeking UniversityBeijing 100191China department of Neurology Peking University Third HospitalBeijing 100191China department of Electronic Engineering Tsinghua UniversityBeijing 100084China state key laboratory of Bioelectronics School of Biological Science and Medical EngineeringSoutheast UniversityNanjing 210096China School of Biological science and Medical Engineering Beihang UniversityBeijing 100191China key laboratory of Alzheimer’s Disease of Zhejiang Province Institute of AgingSchool of Mental HealthWenzhou Medical UniversityWenzhou 325035China NMPA key laboratory for Evaluation of Medical Imaging Equipment and Technique Beijing 100191China

Ischemic stroke is a leading cause of death and disability *** response after stroke determines the outcome of ischemic injury.A recent study has reported an efficient method,epidural arterial implantation(EAI),for accelerating interstitial fluid(ISF)drainage,which provides a promising strategy to clear pro-inflammatory cytokines in the brain extracellular space(ECS).In this study,the method of EAI was modified(m-EAI)to control its function of accelerating the ISF drainage at different time points following ischemic *** neuroprotective effect of m-EAI on ischemic stroke was evaluated with the transient middle cerebral artery occlusion(tMCAO)rat *** results demonstrated the accumulation of IL-1β,IL-6,and TNF-αwas significantly decreased by activating m-EAI at 7 d before and immediately after ischemic attack in tMCAO rats,accompanied with decreased infarct volume and improved neurological *** study consolidates the hypothesis of exacerbated ischemic damage by inflammatory response and provides a new perspective to treat encephalopathy via brain *** research is essential to investigate whether m-EAI combined with neuroprotective drugs could enhance the therapeutic effect on ischemic stroke.

关键词： ischemic stroke brain extracellular space interstitial fluid modified epidural arterial implantation

Recent progress of radionuclides separation by porous materials

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science china Chemistry 2024年第11期67卷 3515-3577页

作者： Yinghui Xie Long yu Long Chen cheng Chen Li Wang Fenglei Liu yun Liao Peng zhang Tao Chen Yihui yuan yuexiang Lu Boyang Huang Hui Yang Suhua Wang Shuao Wang Lijian Ma Feng Luo yunhai Liu Baowei Hu Hongqing Wang Duoqiang Pan Wenkun Zhu Ning Wang Zhe Wang Liang Mao Shengqian Ma Xiangke Wang Guangdong Provincial key laboratory for Green Agricultural Production and intelligent Equipment School of Environmental Science and Engineering Guangdong University of Petrochemical Technology School of Life science Shaoxing University College of Environmental science and Engineering North China Electric Power University state key laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions Soochow University College of Chemistry Sichuan University School of Chemistry and Materials science East China University of Technology School of Chemistry and Chemical Engineering University of South China Frontiers science Center for Rare Isotopes Lanzhou University state key laboratory of Environment-friendly Energy Materials National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety Sichuan Civil-military Integration Institute School of National Defence & Nuclear Science and TechnologySouthwest University of Science and Technology state key laboratory of Marine Resource Utilization in South china Sea Collaborative Innovation Center of Marine Science and Technology Hainan University Institute of Nuclear and New Energy technology Tsinghua University state key laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University department of Chemistry University of North Texas

The separation of radionuclides is critical for the sustainable development of nuclear energy. It is urgent to design and prepare functionalized materials for efficient radionuclides separation. Porous materials are considered excellent candidates for the separation of radionuclides under complex conditions due to their high specific surface areas, tunable pore structures and controllable functionalities. In this review, we summarized the design, preparation and functionalization of porous materials and their application for separation of radionuclides in the past five years, discussed the separation performance and analyzed the structure-activity relationship between various radionuclides and porous materials, and systematically clarified their characterization and mechanism of different type porous materials. We also introduced the detection, irradiation and chemical toxicity of different reflective radionuclides.

关键词： porous materials radionuclides detection separation radiotoxicity interaction mechanism

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... School of Electronic science and Engineering Nanjing University School of Integrated Circuits Interdisciplinary Research Center for Future Intelligent Chips (Chip-X)Nanjing University School of Integrated Circuit science and Engineering Nanjing University of Posts and Telecommunications state key laboratory of Infrared Physics Shanghai Institute of Technical Physics Chinese Academy of Sciences School of Physics and key Lab of Quantum Materials and Devices of the Ministry of Education School of Electronic Science & EngineeringSoutheast University College of Integrated Circuits State Key Laboratory of Silicon and Advanced Semiconductor MaterialsZhejiang University Suzhou laboratory state key laboratory of Integrated Chips and systems School of MicroelectronicsFudan University Shaoxin laboratory 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

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 microelectronic devices optoelectronic devices multi-functional integration

基于LSTM-KF模型的高速列车群组追踪运行轨迹预测方法

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交通运输工程学报 2024年第3期24卷 296-310页

作者：张淼何仪娟杨博宇罗正伟卢万里唐涛李开成吕继东中国铁道科学研究院集团有限公司国家铁路智能运输系统工程技术中心北京100081 北京交通大学轨道交通运行控制系统国家工程研究中心北京100044 柏林洪堡大学计算机科学研究所柏林BE 104894 北京交通大学先进轨道交通自主运行全国重点实验室北京100044

为进一步缩小列车追踪距离以提高运力,研究了高速列车群组追踪运行轨迹预测问题;考虑长短期记忆网络(LSTM)模型处理序列数据的优势和卡尔曼滤波(KF)模型噪声处理的能力,提出了一种新型列车轨迹预测LSTM-KF模型;使用列车运行的历史数据进... 详细信息

为进一步缩小列车追踪距离以提高运力,研究了高速列车群组追踪运行轨迹预测问题;考虑长短期记忆网络(LSTM)模型处理序列数据的优势和卡尔曼滤波(KF)模型噪声处理的能力,提出了一种新型列车轨迹预测LSTM-KF模型;使用列车运行的历史数据进行LSTM模型训练,生成了列车轨迹预测曲线;KF模型结合预测结果和动力学机理,更正了计算结果,使LSTM模型预测的列车轨迹变得平滑;依托于高铁列控系统仿真测试平台的标准线路数据进行了仿真验证。仿真结果表明:在巡航工况下,30个预测步长后,LSTM-KF、LSTM和循环神经网络(RNN)模型的位置预测误差分别为78、798和911 m,速度相对真实值的预测误差分别为1、22和1 m·s^(-1),LSTM-KF模型的位置均方根误差(RMSE)分别为LSTM和RNN的7%和15%,LSTM-KF模型的速度RMSE分别为LSTM和RNN的14%和30%;在加速工况下,3个模型的位置预测误差均值分别为94、294和2691 m,速度预测误差均值分别为0.09、10.05和2.74 m·s^(-1);在减速工况下,3个模型的位置预测误差均值分别为1181、4135和4079 m,速度预测误差均值分别为1.14、6.01和13.52 m·s^(-1)。可见,LSTM-KF模型在不同运行工况下均能显著提升预测精度,能够有效生成长时域数据序列,为高速列车群组追踪运行提供决策。

关键词：高速列车群组追踪运行车-车通信轨迹预测长短期记忆网络卡尔曼滤波

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满足匹配律的策略参数搜索决策模型

中国科学：信息科学 2012年第1期42卷 83-98页

作者：程振波张宇邓志东清华信息科学与技术国家实验室(筹)智能技术与国家重点实验室清华大学计算机系北京100084 浙江工业大学计算机科学与技术学院杭州310014

匹配律是决策理论的基本定律之一,它建立了对备选目标的偏好与所获奖励之间的对应关系.通过构建获得匹配律的策略模型,研究了该定律成立的可能机制.基于再励学习理论,提出了通过调整策略参数以满足决策目标的策略搜索模型.在该策略模型... 详细信息

匹配律是决策理论的基本定律之一,它建立了对备选目标的偏好与所获奖励之间的对应关系.通过构建获得匹配律的策略模型,研究了该定律成立的可能机制.基于再励学习理论,提出了通过调整策略参数以满足决策目标的策略搜索模型.在该策略模型的基础上,通过设定简单的假设条件推导出满足匹配律的策略算法.理论分析和数值仿真结果均验证了算法的正确性.另一方面利用该算法模拟了经典的心理学与神经生理学的匹配行为实验.研究结果不仅对匹配行为给出了合理的解释,也为建立基于奖励的决策模型提供了一种有效的理论建模方法.

关键词：策略模型匹配律再励学习决策模型神经回路

Collaborative Control of Novel Uninterrupted Propulsion System for All-Climate Electric Vehicles

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Automotive Innovation 2022年第1期5卷 18-28页

作者： cheng Lin Xiao yu Mingjie Zhao Jiang Yi Ruhui zhang national Engineering laboratory for Electric Vehicles Beijing Institute of TechnologyBeijingChina state key laboratory of Automotive Safety and Energy Tsinghua UniversityBeijingChina Collaborative Innovation Center of Electric Vehicles in beijing Beijing Institute of TechnologyBeijingChina

Over the past decade,the electric vehicle industry of china has developed rapidly,reaching one of the highest technological levels in the ***,most electric buses currently serve urban areas,being unsuitable for all-climate *** response to the objective of massively adopting electric vehicles for transportation during all the events of the 2022 beijing Winter Olympics,a dual-motor coaxial propulsion system for all-climate electric vehicles is *** system aims to meet operating requirements such as high speed and adaptability to mountainous roads under severely cold *** system provides three operating modes,whose characteristics are analyzed under different *** addition,dual-motor collaborative control strategy with collaborative gearshift and collaborative power distribution is proposed to eliminate power interruption during gearshift process and achieve intelligent power distribution,thus improving the gearshift quality and reducing energy ***,gear position calibration for all-climate operation and proper gearshift is *** results demonstrate the advantages of the proposed dual-motor coaxial propulsion system regard-ing gearshift compared with the conventional single-motor automatic transmission.

关键词： Dual-motor coaxial propulsion system·Collaborative control·Gear position calibration·All-climate operation

An Effective RAID Data Layout for Object-Based De-duplication Backup System

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Chinese Journal of Electronics 2016年第5期25卷 832-840页

作者： YAN Fang TAN yu'an zhang Quanxin WU Fei cheng Zijing ZHENG Jun School of computer science and technology Beijing Institute of Technology School of information Beijing Wuzi University beijing Engineering Research Center of Massive Language information Processing and Cloud Computing Application Wuhan national laboratory for Optoelectronics Huazhong University of Science and Technology Space Star technology CO. LtdChina Academy of Space Technology

We propose an alternative Redundant array of independent disks(RAID) data layout, Asymmetrical grouping data organization(AGDO), for object-based data de-duplication backup system. Object-based data deduplication is an effective solution for detecting duplicate data for compound files. We designed an asymmetrical grouping strategy, the disk in the array are partitioned into different groups, and in each group parallelism data access scheme is adopted, different types of objects are stored in different groups with maybe different group size, it can set and manage dynamic group size by using dynamic disk group adjustment algorithms. The performance of AGDO is evaluated and proved to be sufficient for the continuous storage application. The result is that disk accesses are concentrated in a part of the disks over a long time period and reduces the power consumption to 25% in a 10-disk configuration. Moreover, object-based de-duplication combined with AGDO has great potential in increasing data restoration speed for compound files. We have shown that this combination makes average restoration speed improved 11%.

关键词： Data layout Object-based deduplication Backup Energy aware Redundant array of independent disks(RAID)