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Review on global change status and its impacts on the Tibetan Plateau environment

Journal of Plant Ecology 2019年第6期12卷 917-930页

作者： Aamir Latif Sana Ilyas Yangjian Zhang yuqin xin Lin Zhou Quan Zhou Key Laboratory of Ecosystem Network Observation and Modelling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric PhysicsBeijing 100029China Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of SciencesBeijing 100101China Sanmenxia Academy of Environmental Sciences Sanmenxia 472000China Southwest Branch of State Grid Corporation of China Chengdu 610094China

The Tibetan Plateau(TP)holds fundamental ecological and environmental significances to China and *** TP also lies in the core zone of the belt and road *** protect the TP environment,a comprehensive screening on current ecological research status is *** teased out research gap can also be utilized as guidelines for the recently launched major research programs,*** second TP scientific expedition and silk and belt road research *** findings showed that the TP has experienced significant temperature increase at a rate of 0.2℃ per decade since *** most robust warming trend was found in the northern *** also exhibited an increasing trend but with high spatial *** climates have caused a series of environmental consequences,including lake area changes,glacier shrinkage,permafrost degradation and exacerbated *** rising temperature is the main reason behind the glaciers shrinkage,snow melting,permafrost degradation and lake area changes on the TP and neighboring *** projected loss of glacial area on the plateau is estimated to be around 43%by 2070 and 75%by the end of the *** was responsive to the changed environments,varied climates and intensified human activities by changing phenology and *** global change study should be more oriented toward integrating various research methods and tools,and synthesizing diverse subjects of water,vegetation,atmosphere and soil.

关键词： Tibetan Plateau silk and belt road climate change human activities environmental consequences

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侯马市生态低碳平菇生产关键技术

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农业技术与装备 2024年第3期 158-160页

作者：李恒旭王水娟辛玉琴陈晓霖马勇中国农业大学北京100083 侯马市农业农村局山西侯马043000 侯马市新田乡人民政府山西侯马043000

随着生态农业和低碳农业的发展,食用菌产业在其中的地位和作用逐步突显,较好地融合了生态低碳农业生产模式,实现了生态效益、经济效益、社会效益三者的统一。为了更好地推广这种良好的生产模式,助力乡村振兴,以侯马市为例,结合平菇的生... 详细信息

随着生态农业和低碳农业的发展,食用菌产业在其中的地位和作用逐步突显,较好地融合了生态低碳农业生产模式,实现了生态效益、经济效益、社会效益三者的统一。为了更好地推广这种良好的生产模式,助力乡村振兴,以侯马市为例,结合平菇的生态生理特性,从品种选择、栽培模式、工艺流程、生产管理、化肥农药使用、病虫害防治等方面,详细介绍了生态低碳平菇生产栽培关键技术,并分析了相关的生态、经济及社会效益。

关键词：生态农业低碳农业平菇栽培侯马市

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High-Performance and Large-Area Inverted Perovskite Solar Cells Based on NiO_(x) Films Enabled with A Novel Microstructure-Control Technology

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Energy & Environmental Materials 2024年第1期7卷 153-159页

作者： Guibin Shen xin Li yuqin Zou Hongye Dong Dongping Zhu Yanglin Jiang xin Ren Ng Fen Lin Peter Müller-Buschbaum Cheng Mu Key Laboratory of Advanced Light Conversion Materials and Biophotonics Department of ChemistryRenmin University of ChinaBeijing 100872China Solar Energy Research Institute of Singapore(SERIS) National University of SingaporeSingapore 117574Singapore Physik-Department Lehrstuhl für Funktionelle MaterialienTechnische Universität MünchenJames-Franck-Straße 185748Garching Germany Heinz Maier-Leibnitz Zentrum(MLZ) Technische Universität MünchenLichtenbergstr.185748Garching Germany

The improvement in the efficiency of inverted perovskite solar cells(PSCs)is significantly limited by undesirable contact at the NiO_(x)/perovskite *** this study,a novel microstructure-control technology is proposed for fabrication of porous NiO_(x)films using Pluronic P123 as the structure-directing agent and acetylacetone(AcAc)as the coordination *** synthesized porous NiO_(x)films enhanced the hole extraction efficiency and reduced recombination defects at the NiO_(x)/perovskite ***,without any modification,the power conversion efficiency(PCE)of the PSC with MAPbl_(3)as the absorber layer improved from 16.50%to 19.08%.Moreover,the PCE of the device composed of perovskite Cs0.05(MA_(0.15)FA_(0.85))_(0.95)Pb(I_(0.85)Br_(0.15))_(3)improved from 17.49%to 21.42%.Furthermore,the application of the fabricated porous NiO_(x)on fluorine-doped tin oxide(FTO)substrates enabled the fabrication of large-area PSCs(1.2 cm^(2))with a PCE of 19.63%.This study provides a novel strategy for improving the contact at the NiO_(x)/perovskite interface for the fabrication of high-performance large-area perovskite solar cells.

关键词： interfacial contact inverted and large-area perovskite solar cells photovoltaic materials porous NiO_(x)films renewable energy

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Longer conserved alpine forests ecosystem exhibits higher stability to climate change on the Tibetan Plateau

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Journal of Plant Ecology 2019年第4期12卷 645-652页

作者： Jian Li Nan Cong Jiaxing Zu yuqin xin Ke Huang Quan Zhou Yaojie Liu Lin Zhou Li Wang Yang Liu Ge Zhang Southwest Branch of State Grid Corporation of China Chengdu 610094China Lhasa Plateau Ecosystem Research Station Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100090China Xizang xinhe Supervision and Consulting Limited Company Lhasa 850000China International Institute for Earth System Science Nanjing UniversityNanjing 210023China School of Geography and Ocean Science Nanjing UniversityNanjing 210023China Peking University Shenzhen Graduate School Shenzhen 518055China State Grid Sichuan Electric Power Company Chengdu 610094China School of Urban and Environment Liaoning Normal UniversityDalian 116029China Heilongjiang University of Science and Technology Harbin 150001China

Aims Vegetation dynamics are simultaneously regulated by climate change and anthropogenic *** the 1980s,climate has been warming on the Tibetan Plateau(TP)at a rate higher than North Hemisphere *** activities,including grazing,farming,and urbanization,are also influencing the alpine ecosystem on the ***,an ensemble of large engineering projects,such as power transported from west to east by State Grid,has been in operation on the *** studies disentangling effects of climate and anthropogenic activities interference are still lacking for the forest ecosystems on the *** overarching objectives of this study were to separate effects of natural climates and human interferences on forest ecosystem dynamics on the *** We compared vegetation activities of two typical natural reserves(Gongbu natural reserve,GNR,and Yarlung zangbo river grand canyon natural reserve,YNR)and their surroundings in southeastern Tibet(outside of the natural reserves,ONR)using long-term satel-lite normalized difference vegetation index(NDVI)*** regression and partial correlation analyses were constructed for the relationship between vegetation activity and climates to evaluate the distinct climate effects on the two natural *** Findings The two natural reserves were established at different time,which were related to anthropogenic activities impact *** results showed that the annual mean NDVI fluctuated between 0.5 and 0.6 in the relatively longer reserved YNR,which was re-markably higher than those in other regions(with NDVI lower than 0.45).The vegetation vigor in the YNR showed neither a sig-nificant temporal trend nor significant relationship with ***,vegetation vigor exhibited a significant increasing trend during the last three decades(0.012/decade)at the *** inter-decadal analysis turned out positive relationships between vegetation vigor and annual temperature since late 1990s u

关键词： climate change human interference natural reserves vegetation activity Southeastern Tibet

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Calycosin improves atherosclerosis by reshaping the interaction between the gut microbiome and bile acid metabolism

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Food Science and Human Wellness 2024年

作者： Jiaqi Fu Donghua Yu yuqin Liang xin Gao Yunhe Shi Yu Wang Pingping Chen Shumin Liu Fang Lu Institute of Traditional Chinese Medicine， Heilongjiang University of Chinese Medicine

Calycosin， Astragali Radix most prominent ingredient， has drawn more attention as a result of its ability to treat atherosclerosis(AS). However， the mechanism of action has not been fully elucidated. We investigated the effects of calycosin on bile acid (BA) metabolism and gut microbiome in ApoE-/-mice fed a high-fat diet (HFD). The data showed that the aorta of ApoE-/-mice treated with HFD showed significant atheromatous plaque formation and lipid accumulation， and the levels of TC， TG and LDL-C were significantly increased， while the levels of HDL-C were significantly decreased. Calycosin can substantially regulate lipid levels， thereby alleviating liver lipid deposition induced by atherosclerosis. In addition， 16S rRNA sequencing showed that calycosin treatment has reshaped the gut microbiota disturbed by HFD， in particular， increasing the ratio of Bacteroidetes/Firmicutes， and improving the relative abundance of Bilophila， Desulfovibrio， Bacteroides， Lactobacillus， etc. Meanwhile， targeted metabolomics analysis showed that calycosin treatment significantly modulated CDCA， TCA， LCA， DCA， TDCA and bile acid pool composition， which were associated with atherosclerotic plaque areas. In addition， calycosin treatment also down-regulated FXR protein levels and up-regulated CYP7A1 protein levels in the hepatic. At the same time， calycosin inhibits the ileum FXR/TGR5 signaling pathway， inhibits BA reabsorption， promotes BA excretion， and reduces hepatic cholesterol accumulation by enterohepatic circulation. In addition， we found that calycosin significantly promoted the expression of hepatic ABCA1 and ABCG1 to mediate cholesterol efflux. Meanwhile， calycosin regulates gut microbiota， and Bacteroides， Alistipes， Desulfovibrio， Lactobacillus， Bilophila and Odoribacter are closely related to specific BAs. This enables us to further understand the relationship between BA metabolism and gut microbiota. Calycosin may reduce high-fat diet-induced hepatic cholesterol accumulatio

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Distributed collaborative complete coverage path planning based on hybrid strategy

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Journal of Systems Engineering and Electronics 2024年第2期35卷 463-472页

作者： ZHANG Jia DU xin DONG Qichen xin Bin School of Automation Beijing Institute of TechnologyBeijing 100081China National Key Laboratory of Autonomous Intelligent Unmanned Systems Beijing Institute of TechnologyBeijing 100081China

Collaborative coverage path planning(CCPP) refers to obtaining the shortest paths passing over all places except obstacles in a certain area or space. A multi-unmanned aerial vehicle(UAV) collaborative CCPP algorithm is proposed for the urban rescue search or military search in outdoor *** to flexible control of small UAVs, it can be considered that all UAVs fly at the same altitude, that is, they perform search tasks on a two-dimensional plane. Based on the agents’ motion characteristics and environmental information, a mathematical model of CCPP problem is established. The minimum time for UAVs to complete the CCPP is the objective function, and complete coverage constraint, no-fly constraint, collision avoidance constraint, and communication constraint are considered. Four motion strategies and two communication strategies are designed. Then a distributed CCPP algorithm is designed based on hybrid strategies. Simulation results compared with patternbased genetic algorithm(PBGA) and random search method show that the proposed method has stronger real-time performance and better scalability and can complete the complete CCPP task more efficiently and stably.

关键词： multi-agent cooperation unmanned aerial vehicles(UAV) distributed algorithm complete coverage path planning(CCPP)

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Controllable nucleation and deformation of skyrmions on surface of magnetic nanotubular monolayer

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Rare Metals 2024年第7期43卷 3250-3259页

作者： xin-xin Zhang Chen-Yu Zhang Yi-xin xing Chao Man Jiao Liu Yong Hu Department of Physics College of SciencesNortheastern UniversityShenyang 110819China School of Materials and Mineral Resources Engineering Universiti Sains MalaysiaEngineering Campus14300 Nibong TebalPenangMalaysia State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang110819China

Magnetic skyrmions emerge when the energy of ferromagnetic exchange interaction promoting parallel alignment of spins enters in competition with energies favoring non-collinear alignment of spins such as Dzy aloshinskii-Moriya interaction(DMI),long-rang dipole-dipole interaction(DDI),or higher-order exchange *** perform an unbiased Monte Carlo simulation to study the DMI-based skyrmion nucleation and stabilization on the surface of magnetic nanotubular monolayer controlled by tuning constants of DDI(g) and next-nearest-neighbor antiferromagnetic exchange interaction(j') with appropriate *** g and j',the loosely distributed skyrmions initially nucleate on the surface of nanotube approaching to the magnetic field(h) direction with increasing h in the intermediate ***,the skyrmion size,shape,density,distribution and crystal structure,as well as its driven field range,are tailored by g and j'.This work demonstrates the skyrmion nucleation mechanisms in three-dimensional magnetic nanostructures with curvature effect and multiple interactions,serving as a benchmark for a guide to experimentalists for preparation of samples in magnetic skyrmion states.

关键词： Magnetic nanotube Magnetic skyrmion Dzyaloshinskii-Moriya interaction Dipole-dipole interaction Monte Carlo simulation

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Simulation and evaluation study of atmospheric aerosol nonsphericity as a function of particle size

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Particuology 2024年第7期90卷 281-291页

作者： Qianjun Mao xin Nie School of Urban Construction Wuhan University of Science and TechnologyWuhan430065China College of New Energy and Materials Northeast Petroleum UniversityDaqing163318China

Aerosol nonsphericity causes great uncertainty in radiative forcing assessments and climate *** considerable studies have attempted to quantify this uncertainty,the relationship between aerosol nonsphericity and particle size is usually not considered,thus reducing the accuracy of the *** this study,a coupled inversion algorithm combining an improved stochastic particle swarm optimization algorithm and angular light scattering is used for the nonparametric estimation of aerosol nonsphericity variation with particle size,and the optimal sample selection method is employed to screen the *** on the verification of inversion accuracy,the variation of aerosol aspect ratio with particle size based on the ellipsoidal model in global regions has been obtained from Aerosol Robotic Network(AERONET)data,and the effect of nonsphericity on radiative forcing and dry deposition has been *** results show that the aspect ratio increases with particle size in all regions,with the maximum ranging from 1.4 to 1.8 in the desert,reflecting the differences in aerosol composition at different particle *** radiation calculations,considering aerosol nonsphericity makes the aerosol cooling effect weaker and surface radiative fluxes increase,but hardly changes the aerosol absorption,with maximum differences of 9.22%and 22.12%at the bottom and top of the atmosphere,***,the differences in radiative forcing between aspect ratios as a function of particle size and not varying with particle size are not significant,averaging less than 2%.Besides,the aspect ratio not varying with particle size underestimates the deposition velocity of small particles and overestimates that of large particles compared to that as a function of particle size,with maximum differences of 7%and 4%,respectively.

关键词： Aerosol nonsphericity Inversion Aspect ratio Radiative forcing Dry deposition velocity

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Dominant woody plant species recognition with a hierarchical model based on multimodal geospatial data for subtropical forests

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Journal of Forestry Research 2024年第3期35卷 111-130页

作者： xin Chen Yujun Sun State Forestry&Grassland Administration Key Laboratory of Forest Resources&Environmental Management Beijing Forestry UniversityBeijing 100083People's Republic of China

Since the launch of the Google Earth Engine(GEE)cloud platform in 2010,it has been widely used,leading to a wealth of valuable ***,the potential of GEE for forest resource management has not been fully *** extract dominant woody plant species,GEE combined Sen-tinel-1(S1)and Sentinel-2(S2)data with the addition of the National Forest Resources Inventory(NFRI)and topographic data,resulting in a 10 m resolution multimodal geospatial dataset for subtropical forests in southeast *** and texture features,red-edge bands,and vegetation indices of S1 and S2 data were computed.A hierarchical model obtained information on forest distribution and area and the dominant woody plant *** results suggest that combining data sources from the S1 winter and S2 yearly ranges enhances accuracy in forest distribution and area extraction compared to using either data source ***,for dominant woody species recognition,using S1 winter and S2 data across all four seasons was *** terrain factors and removing spatial correlation from NFRI sample points further improved the recognition *** optimal forest extraction achieved an overall accuracy(OA)of 97.4%and a maplevel image classification efficacy(MICE)of 96.7%.OA and MICE were 83.6%and 80.7%for dominant species extraction,*** high accuracy and efficacy values indicate that the hierarchical recognition model based on multimodal remote sensing data performed extremely well for extracting information about dominant woody plant *** the results using the GEE application allows for an intuitive display of forest and species distribution,offering significant convenience for forest resource monitoring.

关键词： Google Earth Engine Sentinel Forest resource inventory data Dominant woody plant species Subtropics Model performance

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对民族地区图书馆现代化建设的思考

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攀登（哲学社会科学版） 2010年第2期29卷 127-130页

作者：辛玉琴青海民族大学青海西宁810007

民族地区图书馆的现代化建设,是促进民族地区文化建设的重要方面。本文立足于民族地区实际,着眼于当代科技发展趋势,从注重科学管理、设施建设、人才培养、扩大交流以及开展有益的文化活动等方面,就如何实现图书馆现代化建设的目标进行... 详细信息

民族地区图书馆的现代化建设,是促进民族地区文化建设的重要方面。本文立足于民族地区实际,着眼于当代科技发展趋势,从注重科学管理、设施建设、人才培养、扩大交流以及开展有益的文化活动等方面,就如何实现图书馆现代化建设的目标进行了探讨。

关键词：民族地区图书馆文化建设

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