检索结果-南通市图书馆

Different people,different wild:Comparing and mapping wilderness representation in Wuyishan national Park,ch.na

在线全文

学校读者我要写书评

暂无评论

Defects evolution in n-type 4H-SiC induced by electron irradiation and annealing

地理学与可持续性（英文） 2024年第1期5卷 144-156页

作者： Aifang Weng Lingyun Liao Yue Cao Steve Carver Li Lin Siyuan Shen Zhengduo xu Jianwen dong Siren Lan Rui Yang College of Landscape Architecture and Art Fujian Agriculture and Forestry UniversityFuzhou 350002China College of Geographical Science Fujian Normal UniversityFuzhou 350117China College of Landscape Architecture and Art Fujian Agriculture and Forestry UniversityFuzhou 350002China Institute of Wuyishan national Park Fuzhou 350002China Department of Landscape Architecture School of ArchitectureTsinghua UniversityBeijing 100084China Institute for national Parks Tsinghua UniversityBeijing 100084China Wildland Research Institute School of GeographyUniversity of LeedsLeedsUK College of Landscape Architecture and Art Fujian Agriculture and Forestry UniversityFuzhou 350002China

It is essential to better integrate wilderness representations of different stakeholders into wilderness *** way in which local residents and other stakeholders frame the construction of wilderness of protected areas in developing countries are poorly *** these areas,land use policy and decision may lead to *** study aims to explore existing public wilderness representations using a questionnaire survey(n=514)administered amongst tourists and other stakeholders in the Wuyishan national Park,in southeast *** spatial differences in public representations of wilderness across different stakeholder groups were compared against expert *** found that integrated wilderness representation maps of different stakeholder groups were consistent,namely'area where wild animals live','area with no human influence','a barren and lonely area'.However,three sub-representations of the individual stakeholders varied ***,expert-based wilderness mapping did not reflect public representations accurately,and an integrated wilder-ness quality map considering wilderness representations across both stakeholders and experts can better identify detailed wilderness *** study provides new insights and technical support for future exploration of wilder-ness conservation and mapping in ch.na and other countries with insufficient awareness of wilderness values and investigations in a regional scale.

关键词： Wilderness mapping Public participation Environment perception Protected areas

来源：评论

学校读者我要写书评

暂无评论

Journal of Semiconductors 2024年第7期45卷 77-83页

作者： Huifan Xiong xuesong Lu xu Gao Yuchao Yan Shuai Liu Lihui Song Deren Yang Xiaodong Pi State Key Laboratory of Silicon and Advanced Semiconductor Materials&School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China Key Laboratory of Power Semiconductor Materials and Devices of Zhejiang Province&Institute of Advanced Semiconductors ZJU-Hangzhou Global Scientific and Technological Innovation CenterZhejiang UniversityHangzhou 311200China

Radiation damage produced in 4H-SiC by electrons of different doses is presented by using multiple characterization techniques. Raman spectra results indicate that SiC crystal structures are essentially impervious to 10 Me V electron irradiation with doses up to 3000 kGy. However, irradiation indeed leads to the generation of various defects, which are evaluated through photoluminescence(PL) and deep level transient spectroscopy(DLTS). The PL spectra feature a prominent broad band centered at 500 nm, accompanied by several smaller peaks ranging from 660 to 808 nm. The intensity of each PL peak demonstrates a linear correlation with the irradiation dose, indicating a proportional increase in defect concentration during irradiation. The DLTS spectra reveal several thermally unstable and stable defects that exhibit similarities at low irradiation ***, after irradiating at the higher dose of 1000 kGy, a new stable defect labeled as R_(2)(Ec-0.51 eV) appeared after annealing at 800 K. Furthermore, the impact of irradiation-induced defects on SiC junction barrier Schottky diodes is discussed. It is observed that high-dose electron irradiation converts SiC n-epilayers to semi-insulating layers. However, subjecting the samples to a temperature of only 800 K results in a significant reduction in resistance due to the annealing out of unstable defects.

关键词： 4H-SiC deep level transient spectroscopy(DLTS) photoluminescence(PL) defects

Phonon-blockade-based multiple-photon bundle emission in a quadratically coupled optomech.nical system

在线全文

学校读者我要写书评

暂无评论

Frontiers of physics 2024年第3期19卷 207-215页

作者： Ye-Jun xu Hong Xie Interdisciplinary Research Center of Quantum and Photoelectric Information Chizhou UniversityChizhou 247000China Department of Mathematics and Physics Fujian Jiangxia UniversityFuzhou 350108China

We propose a scheme to realize antibunched multiple-photon bundles based on phonon blockade in a quadratically coupled optomech.nical *** adjusting the detunings to match the conditions of phonon blockade in the photon sidebands,we establish super-Rabi oscillation between zero-photon state and multiple-photon states with adjustable super-Rabi frequencies under appropriate single-phonon resonant *** the system dissipation into account,we numerically calculate the standard and generalized second-order functions of the cavity mode as well as the quantum trajectories of the state populations with Monte Carlo simulation to confirm that the emitted photons form antibunched multiple-photon ***,the desirable n-photon states are reconstructed after a direct phonon emission based on phonon blockade,and thus the single-phonon emission heralds the cascade emission of n-photon *** proposal shows that the optomech.nical system can simultaneously behave as antibunched multiple-photon emitter and single-phonon *** a nonclassical source could have potential applications in quantum information science.

关键词： multiple-photon bundle emission phonon blockade optomech.nical system

Scattering for the Radial Schrodinger Equation with Combined Power-type and choquard-type nonlinearities

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2024年第4期40卷 1029-1041页

作者： Ying WAnG ch.ng Bin xu The Graduate School of ch.na Academy of Engineering Physics Beijing 100088P.R.China School of Mathematics and Statistics Qinghai Normal UniversityXining 810008P.R.China

In this paper,we show the scattering of the radial solution for the nonlinear Schrodinger equation with combined power-type and choquard-type nonlinearities iut+△u=λ1|u|p1-1u+λ2(Iα*|u|^(p2))|u|p^(2-2)*** the energy space H^(1)(R^(n))forλ_(1)λ_(2)=-*** establish a scattering criterion for radial solution together with Morawetz estimate which implies the scattering *** show that the defocusing perturbation terms does not determine the scattering solution in energy space.

关键词： Schrodinger equation choquard-type Scattering theory

Biomimetic MXene membranes with negatively thermo-responsive switchable 2D nanoch.nnels for graded molecular sieving

在线全文

学校读者我要写书评

暂无评论

Green Energy & Environment 2024年第6期9卷 1058-1067页

作者： Yi Wang Yangyang Wang ch.ng Liu dongjian Shi Weifu dong Baoliang Peng Liangliang dong Mingqing ch.n The Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxiJiangsu214122China International Research Center for Photo-responsive Molecules and Materials Jiangnan UniversityWuxiJiangsu214122China Research Institute of Petroleum Exploration&Development(RIPED) PetroChina/Key Laboratory of Oilfield ChemistryCNPCBeijing100083China

negatively thermo-responsive 2D membranes,which mimic the stomatal opening/closing of plants,have drawn substantial interest for tunable molecular separation ***,these membranes are still restricted significantly on account of low water permeability and poor dynamic tunability of 2D nanoch.nnels under temperature ***,we present a biomimetic negatively thermo-responsive MXene membrane by covalently grafting poly(n-isopropylacrylamide)(PnIPAm)onto MXene *** uniformly grafted PnIPAm polymer chains can enlarge the interlayer spacings for increasing water permeability while also allowing more tunability of 2D nanoch.nnels for enhancing the capability of gradually separating multiple molecules of different *** expected,the constructed membrane exhibits ultrahigh water permeance of 95.6 L m^(-2) h^(-1) bar^(-1) at 25℃,which is eight-fold higher than the state-of-the-art negatively thermoresponsive 2D ***,the highly temperature-tunable 2D nanoch.nnels enable the constructed membrane to perform excellent graded molecular sieving for dye-and antibiotic-based ternary *** strategy provides new perspectives in engineering smart 2D membrane and expands the scope of temperature-responsive membranes,showing promising applications in micro/nanofluidics and molecular separation.

关键词： Thermo-responsive 2D membrane MXene nanosheets PnIPAm Temperature-tunable 2D nanoch.nnels Graded molecular sieving

Insight into the mech.nism of 5-hydroxymethylfurfural electroreduction to 2,5-bis(hydroxymethyl)furan over Cu anchored n-doped carbon nanosheets

在线全文

学校读者我要写书评

暂无评论

nano Research 2024年第9期17卷 7991-7999页

作者： Haoran Wu Xinwei ch.n Haishan xu Runlu Yang Xin Wang Junying ch.n Zhenbing Xie Liang Wu Yiyong Mai School of chemical Engineering Zhengzhou UniversityZhengzhou 450001China School of chemistry and chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Key Laboratory of Electrical Insulation and Thermal AgeingShanghai Jiao Tong UniversityShanghai 200240China Department of chemistry Tangshan Normal UniversityTangshan 063000China

Design of non-noble metal electrocatalysts for biomass conversion to high-value chemicals and understanding the related catalytic mech.nisms are of profound significance but have remained a major ***,we developed a novel biomass-derived electrocatalyst(denoted as Cu/nC),featuring with electron-deficient copper nanoparticles anchored on n-doped carbon nanosheets,for the electrochemical reduction of 5-hydroxymethylfurfural(HMF)to 2,5-bis(hydroxymethyl)furan(BHMF,a vital precursor of functional polymers).The optimized Cu/nC electrocatalyst exhibited an excellent performance with high Faradaic efficiency(89.5%)and selectivity(90.8%)of BHMF at a low concentration of HMF(18.1 mM).Even at a very high HMF concentration(108.6 mM),the Faraday efficiency and selectivity of BHMF could still reach 74.8%and 81.1%,*** performance approached those of the reported noble metal-based *** study revealed that the n doping in the Cu/nC catalyst could regulate the electronic structure of Cu,strengthening the adsorption of the HMF carbonyl group,and thus boosting the selectivity of ***,strong electronic metal-support interactions of Cu and the n-doped carbon support optimized the charge transfer rate,thus promoting the dissociation of water to the active hydrogen(H^(*))species and boosting the reaction kinetic rate of H^(*)and HMF.

关键词： biomass 5-hydroxymethylfurfural electrochemical reduction n-doped carbon materials 2,5-bis(hydroxymethyl)furan

Enhanced photocatalytic hydrogen production from Co-MOF/Cn by nitrogen and sulfur co-doped coal-based carbon quantum dots

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第5期42卷 838-850,I0002页

作者： Shiyong xu Mei Li Yijun Wang Caiyun Gao Rongsheng xu Zhiliang jin School of chemistry and chemical Engineering North Minzu UniversityYinchuan750021China ningxia Key Laboratory of Solar chemical Conversion Technology.north Minzu University.Yinchuan 750021China State Key Laboratory of national Ethnic Affairs Commission chemical Technology.north Minzu University Yinchuan750021China

A novel composite photocatalyst for photocatalytic decomposition of water for hydrogen evolution was successfully synthesized by in-situ growth of nitrogen and sulfur co-doped coal-based carbon quantum dots(nSCQDs)nanoparticles on the surface of sheet cobalt-based metal-organic framework(Co-MOF)and graphitic carbon nitride(g-C_(3)n_(4),Cn).The structure and properties of the obtained catalysts were systematically *** effectively broaden the absorption of Co-MOF and Cn in the visible *** new composite photocatalyst has high hydrogen production activity and the hydrogen production rate reaches 6254μmol/(g·h)at pH=*** the same time,nSCQDs synergy Co-MOF/Cn composites have good *** four cycles of hydrogen production,the performance remains relatively *** tran sient photocurrent response and nyquist plot experimental results further demonstrate the improvement of carrier separation efficiency in composite *** semiconductor type(n-type semico nductor)of the single-phase catalyst was determined by the Mott-Schottky test,and the band structure was *** conductive and valence bands of Cn are-0.99 and 1.72 eV,respectively,and the conduction and valence bands of Co-MOF are-1.85 and 1.33 eV,*** e mech.nism of the photocatalytic reaction can be inferred,that is,Z-type heterojunction is formed between Cn an d Co-MOF,and nSCQDs was used as cocatalyst.

关键词： nitrogen and sulfur co-doped Coal-based carbon quantum dots Co-MOF Cn Photocatalytic hydrogen evolution Rare earths

n:ZnO/MoS_(2)-heterostructured flexible synaptic devices enabling optoelectronic co-modulation for robust artificial visual systems

在线全文

学校读者我要写书评

暂无评论

nano Research 2024年第3期17卷 1902-1912页

作者： Lei xu Wenxiao Wang Yang Li Yonghui Lin Wenjing Yue Kai Qian Qinglei Guo Jeonghyun Kim Guozhen Shen School of Information Science and Engineering University of JinanJinan 250022China School of Microelectronics Shandong UniversityJinan 250101China Department of Electronic Convergence Engineering Kwangwoon UniversitySeoul 01897Republic of Korea School of Integrated Circuits and Electronics Beijing Institute of TechnologyBeijing 100081China

With the merits of non-contact,highly efficient,and parallel computing,optoelectronic synaptic devices combining sensing and memory in a single unit are promising for constructing neuromorphic computing and artificial visual *** on this,a n:ZnO/MoS_(2)-heterostructured flexible optoelectronic synaptic device is developed in this work,and its capability in mimicking the synaptic behaviors is systemically investigated under the electrical and light *** synaptic functions,including synaptic plasticity,long-term/short-term memory,and learning-forgetting-relearning property,have been achieved in this synaptic ***,an artificial visual memory system integrating sense and memory is emulated with the device array,and the visual memory behavior can be regulated by varying the light ***,the optoelectronic co-modulation behavior is verified by applying mixed electric and light signals to the *** detail,a transient recovery property is discovered when the electric signals are applied in synergy during the decay of the light response,of which property facilitates the development of robust artificial visual ***,by superimposing electrical signals during the light response process,a differentiated response of the array is achieved,which can be used as a proof of concept for the color perception of the artificial visual system.

关键词： flexible synaptic device synaptic plasticity optoelectronic synapse robust visual memory optoelectronic co-modulation artificial visual system

Disulfiram ameliorates STInG/MITA-dependent inflammation and autoimmunity by targeting RnF115

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2024年第3期21卷 275-291页

作者： Zhi-dong Zhang ch.ng-Rui Shi Fang-xu Li Hu Gan Yanhong Wei Qianhui Zhang Xin Shuai Min ch.n Yu-Lin Lin Tian-ch.n Xiong Xiaoqi ch.n Bo Zhong Dandan Lin Department of Gastrointestinal Surgery Medical Research InstituteFrontier Science Center of Immunology and MetabolismZhongnan Hospital of Wuhan UniversityWuhan UniversityWuhan430071China Department of Virology College of Life SciencesWuhan UniversityWuhan430072China TaiKang Center for Life and Medical Sciences Wuhan UniversityWuhan430071China Wuhan Research Center for Infectious Diseases and Cancer Chinese Academy of Medical SciencesWuhan430071China Department of Rheumatology and Immunology Zhongnan Hospital of Wuhan UniversityWuhan430071China Cancer Center Renmin Hospital of Wuhan UniversityWuhan430060China

STInG(also known as MITA)is an adaptor protein that mediates cytoplasmic DnA-triggered signaling,and aberrant activation of STInG/MITA by cytosolic self-DnA or gain-of-function mutations causes severe ***,we show that STInG-mediated inflammation and autoimmunity are promoted by RnF115 and alleviated by the RnF115 inhibitor disulfiram(DSF).Knockout of RnF115 or treatment with DSF significantly inhibit systemic inflammation and autoimmune lethality and restore immune cell development in Trex1^(–/–)mice and STInG^(n153S/WT) bone marrow chimeric *** addition,knockdown or pharmacological inhibition of RnF115 substantially downregulate the expression of IFn-α,IFn-γand proinflammatory cytokines in PBMCs from patients with systemic lupus erythematosus(SLE)who exhibit high concentrations of dsDnA in peripheral ***,knockout or inhibition of RnF115 impair the oligomerization and Golgi localization of STInG in various types of cells transfected with cGAMP and in organs and cells from Trex1^(–/–)***,knockout of RnF115 inhibits the activation and Golgi localization of STInGn153S as well as the expression of proinflammatory cytokines in myeloid cells but not in endothelial cells or *** together,these findings highlight the RnF115-mediated cell type-specific regulation of STInG and STInGn153S and provide potential targeted intervention strategies for STInG-related autoimmune diseases.

关键词： STInG/MITA Disulfiram RnF115 SLE Autoimmunity