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Enhancing the Interaction of Carbon Nanotubes by Metal-Organic Decomposition with Improved Mechanical Strength and Ultra-Broadband EMI shielding Performance

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Nano-Micro Letters 2024年第7期16卷 281-294页

作者： Yu-ying shi Si-Yuan liao Qiao-Feng wang Xin-Yun Xu Xiao-Yun wang Xin-Yin Gu You-Gen Hu Peng-Li Zhu Rong Sun Yan-Jun Wan Shenzhen Institute of Advanced Electronic Materials Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055People’s Republic of China Southern University of Science and Technology Shenzhen 518055People’s Republic of China National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050People’s Republic of China

The remarkable properties of carbon nanotubes(CNTs)have led to promising applications in the field of electromagnetic inter-ference(EMI)***,for macroscopic CNT assemblies,such as CNT film,achieving high electrical and mechanical properties remains challenging,which heavily depends on the tube-tube interac-tions of ***,we develop a novel strategy based on metal-organic decomposition(MOD)to fabricate a flexible silver-carbon nanotube(Ag-CNT)*** Ag particles are introduced in situ into the CNT film through annealing of MOD,leading to enhanced tube-tube *** a result,the electrical conductivity of Ag-CNT film is up to 6.82×10^(5) S m^(-1),and the EMI shielding effectiveness of Ag-CNT film with a thickness of~7.8μm exceeds 66 dB in the ultra-broad frequency range(3-40 GHz).The tensile strength and Young’s modulus of Ag-CNT film increase from 30.09±3.14 to 76.06±6.20 MPa(~253%)and from 1.12±0.33 to 8.90±0.97 GPa(~795%),***,the Ag-CNT film exhibits excellent near-field shield-ing performance,which can effectively block wireless *** innovative approach provides an effective route to further apply macroscopic CNT assemblies to future portable and wearable electronic devices.

关键词： EMI shielding Mechanical strength Carbon nanotubes Metal-organic decomposition Flexibility

Resilience and response:Unveiling the impacts of extreme droughts on forests through integrated dendrochronological and remote sensing analyses

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Forest Ecosystems 2024年第4期11卷 491-501页

作者： Han shi Xi Peng Yong-Jiao Zhou Ai-ying wang Xue-Kai Sun Na Li quan-Sheng Bao Gude Buri Guang-You Hao CAS Key Laboratory of Forest Ecology and Silviculture Institute of Applied EcologyChinese Academy of SciencesShenyang110016China Daqinggou Ecological Research Station Institute of Applied EcologyChinese Academy of SciencesShenyang110016China University of Chinese Academy of Sciences Beijing100049China School of Life Science and Engineering Shenyang UniversityShenyang110044China Wudantala Forestry Forestry and Grassland Administration of Horqin Northeast CountyTongliao028100China

Extreme droughts are anticipated to have detrimental impacts on forest ecosystems,especially in water-limited regions,due to the influence of climate ***,considerable uncertainty remains regarding the patterns in species-specific responses to extreme ***,we conducted a study integrating dendrochronology and remote sensing methods to investigate the mosaic-distributed maple-oak(native)natural forests and poplar plantations(introduced)in the Horqin Sandy Land,Northeast *** assessed the impacts of extreme droughts on tree performances by measuring interannual variations in radial growth and vegetation *** results showed that precipitation and self-calibrated palmer drought severity index(scPDSI)are the major factors influencing tree-ring width index(RWI)and normalized difference vegetation index(NDVI).The severe droughts between 2000 and 2004 resulted in reduced RWI in the three studied tree species as well as led to NDVI reductions in both the maple-oak natural forests and the poplar *** RWI reached the nadir during the2000-2004 severe droughts and remained at low levels two years after the severe drought,creating a legacy *** contrast to the lack of significant correlation between RWI and scPDSI,NDVI exhibited a significant positive correlation with scPDSI indicating the greater sensitivity of canopy performance to droughts than radial ***,interspecific differences in RWI and NDVI responses were observed,with the fast-growing poplar species experiencing a more significant RWI decrease and more negative NDVI anomaly during severe droughts than native species,highlighting the species-specific trade-offs between drought resilience and growth *** study emphasizes the importance of combining tree-level radial growth with landscape-scale canopy remote sensing to understand forest resilience and *** study improves our understanding of forest responses to extreme drought and highlights species di

关键词： Introduced tree species Native tree species NDVI Severe drought Tree-ring width

Heat Transfer Effectiveness of Three-Fluid Separated Heat Pipe Exchanger

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Journal of Thermal Science 2011年第1期20卷 64-69页

作者： chengming shi yang wang ying yang quan liao College of Power Engineering Chongqing University Chongqing 400044 China

A heat transfer model for three-fluid separated heat pipe exchanger was analyzed,and the temperature transfer matrix for general three-fluid separated heat exchanger working in parallel-flow or counter-flow mode was *** was found that the forms of temperature transfer matrix are similar for heat pipe rows with equal or different heat transfer surface ***,by using the temperature transfer matrix of the heat pipe exchanger,the relationship between heat transfer effectiveness θ 1,θ 2 and M,NTU,U,Δt i were derived for the exchanger operating in parallel-flow or counter-flow mode,and a simple special example was adopted to demonstrate the correctness of these relationships.

关键词： heat pipes three-fluid heat exchangers heat transfer effectiveness temperature transfer matrix

A von-Neumann-like photonic processor and its application in studying quantum signature of chaos

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Light(Science & Applications) 2024年第4期13卷 672-681页

作者： Shang Yu Wei Liu Si-Jing Tao Zhi-Peng Li Yi-Tao wang Zhi-Peng Zhong Raj BPatel Yu Meng Yuan-Ze yang Zhao-An wang Nai-Jie Guo Xiao-Dong Zeng Zhe Chen Liang Xu Ning Zhang Xiao Liu Mu yang Wen-Hao Zhang Zong-quan Zhou Jin-shi Xu Jian-Shun Tang Yong-Jian Han Chuan-Feng Li Guang-Can Guo CAS Key Laboratory of quantum Information University of Science and Technology of ChinaHefei 230026China. CAS Center for Excellence in quantum Information and quantum Physics University of Science and Technology of ChinaHefei 230026China. Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China. Research Center for quantum Sensing Zhejiang LabHangzhou 310000China. quantum Optics and Laser Science Blackett LaboratoryImperial College LondonPrince Consort RdLondon SW72AZUK. Clarendon Laboratory Department of PhysicsOxford UniversityParks Road OX13PUOxfordUK

Photonic quantum computation plays an important role and offers unique *** decades after the milestone work of Knill-Laflamme-Milburn,various architectures of photonic processors have been proposed,and quantum advantage over classical computers has also been *** is now the opportune time to apply this technology to real-world ***,at current technology level,this aim is restricted by either programmability in bulk optics or loss in integrated optics for the existing architectures of processors,for which the resource cost is also a *** we present a von-Neumann-like architecture based on temporal-mode encoding and looped structure on table,which is capable of multimode-universal programmability,resource-efficiency,phasestability and *** order to illustrate these merits,we execute two different programs with varying resource requirements on the same processor,to investigate quantum signature of chaos from two aspects:the signature behaviors exhibited in phase space(13 modes),and the Fermi golden rule which has not been experimentally studied in quantitative way before(26 modes).The maximal program contains an optical interferometer network with 1694 freely-adjustable *** current state-of-the-art,our architecture stands as the most promising candidate for real-world applications.

关键词： quantum signature chaos

Ablation of drivers in patients with persistent atrial fibrillation refractory to pulmonary vein antral isolation: Target characteristics and 3-year outcomes

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中华医学杂志(英文版) 2024年第14期137卷 1747-1749页

作者： shi Liang Qi Jie wang Yanjiang liao Wenkai Li Xuexun He Shunan Huang Lihong Tian ying Liu Xingpeng Department of Cardiology Beijing Chaoyang Hospital Capital Medical University Beijing China

To the Editor: Pulmonary vein antral isolation (PVAI) is the cornerstone of catheter ablation techniques used in the treatment of patients with atrial fibrillation (AF). However, the outcomes of a PVAI-only strategy for persistent AF have proven suboptimal. The majority of patients with persistent AF may require further atrial ablation beyond PVAI. Ablation of AF drivers, a patient-tailored ablation strategy for persistent AF with a procedural endpoint of AF termination, has garnered increasing attention in recent years. We aimed to determine the electrogram (EGM) characteristics of AF drivers that can predict AF termination.

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The In-Flight Realtime Trigger and Localization Software of GECAM

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Research in Astronomy and Astrophysics 2024年第10期24卷 11-24页

作者： Xiao-Yun Zhao Shao-Lin Xiong Xiang-yang Wen Xin-Qiao Li Ce Cai Shuo Xiao Qi Luo Wen-Xi Peng Dong-Ya Guo Zheng-Hua An Ke Gong Jin-Yuan liao Yan-Qiu Zhang Yue Huang Lu Li Xing Wen Fei Zhang Jing Duan Chen-Wei wang Dong-Li shi Peng Zhang Qi-Bin Yi Chao-yang Li Yan-Bing Xu Xiao-Hua Liang Ya-Qing Liu Da-Li Zhang Xi-Lei Sun Fan Zhang Gang Chen Huan-Yu wang Sheng yang Xiao-Jing Liu Min Gao Mao-Shun Li Jin-Zhou wang Xing Zhou Yi Zhao wang-Chen Xue Chao Zheng Jia-Cong Liu Xing-Bo Han Jin-Ling Qi Jia Huang Ke-Ke Zhang Can Chen Xiong-Tao yang Dong-Jie Hou Yu-Sa wang Rui Qiao Xiang Ma Xiao-Bo Li Ping wang Xin-ying Song Li-Ming Song shi-Jie Zheng Bing Li Hong-Mei Zhang Yue Zhu Wei Chen Jian-Jian He Zhen Zhang Jin Hou Hong-Jun wang Yan-Chao Hao Xiang-Yu wang Zong-Yuan yang Zhi-Long Wen Zhi Chang Yuan-Yuan Du Rui Gao Xiao-Fei Lan Yan-Guo Li Gang Li Xu-Fang Li Fang-Jun Lu Hong Lu Bin Meng Feng shi Hui wang Hui-Zhen wang Yu-Peng Xu Jia-Wei yang Xue-Juan yang Shuang-Nan Zhang Chao-Yue Zhang Cheng-Mo Zhang Zhi-Cheng Tang Cheng Cheng Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100049China School of Information Science and Technology Southwest Jiaotong UniversityChengdu 611756China Key Laboratory of Stellar and Interstellar Physics and Department of Physics Xiangtan UniversityXiangtan 411105China Physics and Space Science College China West Normal UniversityNanchong 637002China Department of Astronomy Beijing Normal UniversityBeijing 100875China Innovation Academy for Microsatellites of CAS Shanghai 201203China Changchun University of Science and Technology Changchun 130022China Chinese Academy of Sciences South America Center for Astronomy National Astronomical ObservatoriesCASBeijing 100101China

Realtime trigger and localization of bursts are the key functions of GECAM,an all-sky gamma-ray monitor launched on 2020 December *** developed a multifunctional trigger and localization software operating in the CPU of the GECAM Electronic *** onboard software has the following features:high trigger efficiency for real celestial bursts with a suppression of false triggers caused by charged particle bursts and background fluctuation,dedicated localization algorithm optimized for both short and long bursts,and low time latency of the trigger information which is downlinked through the Global Short Message Communication service of the global BeiDou navigation *** paper provides a detailed description of the design and development of the trigger and localization software system for *** covers the general design,workflow,the main functions,and the algorithms used in the *** paper also includes on-ground trigger tests using simulated gamma-ray bursts generated by a dedicated X-ray tube,as well as an overview of the performance for real celestial bursts during its in-orbit operation.

关键词： telescopes instrumentation:detectors methods:observational

Application of deep learning methods combined with physical background in wide field of view imaging atmospheric Cherenkov telescopes

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Nuclear Science and Techniques 2024年第4期35卷 208-220页

作者： Ao-Yan Cheng Hao Cai shi Chen Tian-Lu Chen Xiang Dong You-Liang Feng Qi Gao quan-Bu Gou Yi-Qing Guo Hong-Bo Hu Ming-Ming Kang Hai-Jin Li Chen Liu Mao-Yuan Liu Wei Liu Fang-Sheng Min Chu-Cheng Pan Bing-Qiang Qiao Xiang-Li Qian Hui-ying Sun Yu-Chang Sun Ao-Bo wang Xu wang Zhen wang Guang-Guang Xin Yu-Hua Yao Qiang Yuan Yi Zhang School of Physics and Technology Wuhan UniversityWuhan 430072China School of Physics and Astronomy Yunnan UniversityKunming 650091China Ministry of Education The Key Laboratory of Cosmic Rays(Tibet University)Lhasa 850000China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences 19 A Yuquan RoadShijingshan DistrictBeijing 100049China College of Physics Sichuan UniversityChengdu 610064China School of Intelligent Engineering Shandong Management UniversityJinan 250357China Tsung‑Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China Suzhou Aerospace Information Research Institute Suzhou 215123China College of Physics Chongqing UniversityNo.55 Daxuecheng South RoadHigh‑tech DistrictChongqing 401331China Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210008China

The High Altitude Detection of Astronomical Radiation(HADAR)experiment,which was constructed in Tibet,China,combines the wide-angle advantages of traditional EAS array detectors with the high-sensitivity advantages of focused Cherenkov *** objective is to observe transient sources such as gamma-ray bursts and the counterparts of gravitational *** study aims to utilize the latest AI technology to enhance the sensitivity of HADAR *** datasets and models with distinctive creativity were constructed by incorporating the relevant physical theories for various *** models can determine the type,energy,and direction of the incident particles after careful *** obtained a background identification accuracy of 98.6%,a relative energy reconstruction error of 10.0%,and an angular resolution of 0.22°in a test dataset at 10 *** findings demonstrate the significant potential for enhancing the precision and dependability of detector data analysis in astrophysical *** using deep learning techniques,the HADAR experiment’s observational sensitivity to the Crab Nebula has surpassed that of MAGIC and *** energies below 0.5 TeV and remains competitive with conventional narrow-field Cherenkov telescopes at higher *** addition,our experiment offers a new approach for dealing with strongly connected,scattered data.

关键词： VHE gamma-ray astronomy HADAR Deep learning Convolutional neural networks

叶面调理剂对复合污染农田小麦籽粒Cd、As和Pb累积的阻控效应

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环境科学 2024年第3期45卷 1812-1820页

作者：肖冰王秋实高培培赵全利杨威王钊刘文菊薛培英河北农业大学资源与环境科学学院省部共建华北作物改良与调控国家重点实验室河北省农田生态环境重点实验室保定071000 河北农业大学教学试验农场保定071000 河北民得富生物技术有限公司保定072450 泰安市生态环境局肥城分局泰安271699

针对麦田土壤镉(Cd)、砷(As)和铅(Pb)复合污染问题,采用田间小区试验,于拔节期、孕穗期和灌浆初期对小麦进行叶面单独和混合喷施Zn(0.2%ZnSO_(4))、Mg(0.4%MgSO_(4))和Mn(0.2%MnSO_(4))处理,以期探究叶面调理剂对小麦籽粒Cd、As和Pb累... 详细信息

针对麦田土壤镉(Cd)、砷(As)和铅(Pb)复合污染问题,采用田间小区试验,于拔节期、孕穗期和灌浆初期对小麦进行叶面单独和混合喷施Zn(0.2%ZnSO_(4))、Mg(0.4%MgSO_(4))和Mn(0.2%MnSO_(4))处理,以期探究叶面调理剂对小麦籽粒Cd、As和Pb累积的阻控效应,最终筛选出适用于北方重金属复合污染区有效阻控小麦籽粒中Cd、As和Pb累积的叶面调理剂.结果表明,与对照相比,叶面喷施Zn+Mg+Mn复配溶液能够显著降低小麦籽粒中Cd、As和Pb含量,降幅分别为18.96%、23.87%和51.31%,TF籽粒/秸秆分别降低了14.62%、27.73%和47.70%,该叶面调理剂能够通过抑制Cd、As和Pb从小麦茎叶到籽粒的转运进而降低其在籽粒的累积;研究还发现,对照的籽粒中Cd和As主要分布在中心胚乳(34.08%~37.08%),而Pb主要分布在果皮和种皮(27.78%).喷施Zn+Mg+Mn复配溶液可显著降低Cd和As在糊粉层含量,分别比CK降低81.10%和82.24%,而Pb除果皮和种皮、中心胚乳外,各层次Pb含量均显著降低(降幅为42.85%~91.15%),各层次面粉只有糊粉层(P2)重金属含量与Zn含量呈显著负相关.综上所述,对于北方石灰性土壤Cd、As和Pb中度复合污染农田,于小麦拔节期、孕穗期和灌浆初期各喷施一次Zn+Mg+Mn复配的叶面调理剂,可有效阻控Cd、As和Pb在小麦籽粒尤其是糊粉层的累积.在此基础上,可通过去除麦麸来进一步降低重金属尤其是Cd的污染,保证小麦安全生产和粮食安全.

关键词：小麦重金属复合污染镉砷铅叶面调理剂阻控

Efficient polysulfide blocker from conductive niobium nitride@graphene for Li-S batteries

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Journal of Energy Chemistry 2020年第6期29卷 135-141,I0006页

作者： Huifa shi Zhenhua Sun Wei Lv Shujie Xiao Huicong yang ying shi Ke Chen Shaogang wang Bingsen Zhang quan-Hong yang Feng Li Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055GuangdongChina Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina Laboratory of Advanced Materials School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Nanoyang Group State Key Laboratory of Chemical EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China

Lithium sulfur batteries are one of the most promising alternative electrochemical systems,but their practical applications are largely hindered by the serious shuttling problems and sluggish redox ***,the conductive and polar niobium nitride(NbN)is in-situ introduced onto graphene with ultrasmall size and high dispersion,and their composite is used to construct an efficient lithium polysulfide blocking *** graphene helps to construct highly conductive pathways,and niobium nitride serves as the sulfiphilic sites to chemically adsorb the migrating lithium polysulfides and catalyze their redox ***,the cells with the Nb N/G interlayers exhibit a long cycle life with a lower capacity decay of 0.096%/cycle at 1 C for 300 cycles and high rate capability of 937 m Ah g^-1 at 2 *** coupling with a sulfur/carbon nanofiber electrode,the cell with an ultra-high sulfur loading of 10.8 mg cm^-2 delivers an areal capacity of 12.5 m Ah cm^-2 at 0.1 C.

关键词： Lithium-sulfur batteries Niobium nitride Chemical adsorption Catalytic effect High loading