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The relationships between urban-rural temperature difference and vegetation in eight cities of the Great Plains

Frontiers of Earth science 2019年第2期13卷 290-302页

作者： Yaoping CUI Xiangming XIAO Russell B DOUGHTY Yaochen QIN Sujie LIU Nan LI Guosong ZHAO Jinwei DONG Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions Henan UniversityKaifeng 475004China Department of Microbiology and Plant Biology Center for Spatial AnalysisUniversity of OklahomaNormanOK 73019USA Ministry of Education Key Laboratory of Biodiversity Science and Ecological Engineering Institute of Biodiversity ScienceFudan UniversityShanghai 200438China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China

Interpreting the relationship between urban heat island (UHI) and urban vegetation is a basis for understanding the impacts of underlying surfaces on UHL The calculation of UHI intensity (UHII) requires observations from paired stations in both urban and rural *** to the limited number of paired meteorological stations,many studies have used remotely sensed land surface temperature,but these time-series land surface temperature data are often heavily affected by cloud cover and other *** factors,together with the algorithm for inversion of land surface temperature,lead to accuracy problems in detecting the UHII,especially in cities with weak *** on meteorological observations from the Oklahoma Mesonet,a world-class network,we quantified the UHII and trends in eight cities of the Great Plains,USA,where data from at least one pair of urban and rural meteorological stations were *** examined the changes and variability in urban temperature,UHII,vegetation condition (as measured by enhanced vegetation index,EVI),and evapotranspiration (ET).We found that both UHI and urban cold islands (UCI) occurred among the eight cities during 2000-2014 (as measured by impervious surface area).Unlike what is generally considered,UHII in only three cities significantly decreased as EVI and ET increased (p < 0.1),indicating that the UHI or UCI cannot be completely explained simply from the perspective of the underlying *** vegetative cover (signaled by EVI) can increase ET,and thereby effectively mitigate the *** study station clearly showed that the underlying surface or vegetation affects urban-rural temperature,and that these factors should be considered during analysis of the UHI effect over time.

关键词： urbanization evapotranspiration urban cold island background climate air temperature

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Resolving Galactic binaries using a network of space-borne gravitational wave detectors

arXiv

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arXiv 2022年

作者： Zhang, Xue-Hao Zhao, Shao-Dong Mohanty, Soumya D. Liu, Yu-Xiao Lanzhou Center for Theoretical Physics Key Laboratory of Theoretical Physics of Gansu Province School of Physical Science and Technology Lanzhou University Lanzhou730000 China Institute of Theoretical Physics Research Center of Gravitation Lanzhou University Lanzhou730000 China Morningside Center of Mathematics Academy of Mathematics and System Science Chinese Academy of Sciences 55 Zhong Guan Cun Donglu Beijing100190 China Dept. of Physics and Astronomy University of Texas Rio Grande Valley One West University Blvd. BrownsvilleTX78520 United States

Extracting gravitational wave (GW) signals from individual Galactic binaries (GBs) against their self-generated confusion noise is a key data analysis challenge for space-borne detectors operating in the ≈ 0.1 mHz to ≈ 10 mHz range. Given the likely prospect that there will be multiple such detectors, namely LISA, Taiji, and Tianqin, with overlapping operational periods in the next decade, it is important to examine the extent to which the joint analysis of their data can benefit GB resolution and parameter estimation. To investigate this, we use realistic simulated LISA and Taiji data containing the set of 30 × 106GBs used in the first LISA data challenge (Radler), and an iterative source extraction method called GBSIEVER introduced in an earlier work. We find that a coherent network analysis of LISA-Taiji data boosts the number of confirmed sources by ≈ 75% over that from a single detector. The residual after subtracting out the reported sources from the data of any one of the detectors is much closer to the confusion noise expected from an ideal, but infeasible, multisource resolution method that perfectly removes all sources above a given signal-to-noise ratio threshold. While parameter estimation for sources common to both the single detector and network improves broadly in line with the enhanced signal to noise ratio of GW sources in the latter, deviation from the scaling of error variance predicted by Fisher information analysis is observed for a subset of the parameters. Copyright © 2022, The Authors. All rights reserved.

关键词： Signal to noise ratio

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Spiroarborin, an ent-Clerodane Homodimer from Callicarpa arborea as an Inhibitor of the Eleven-Nineteen Leukemia (ENL) Protein by Targeting the YEATS Domain

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Journal of natural products 2022年第2期85卷 317-326页

作者： De-Bing Pu Si-Qi Guo Dong-Xuan Ni Jing Lin Jun-Bo Gao Xiao-Ning Li Rui-Han Zhang Xiao-Li Li Cheng Luo Shi-Jie Chen Wei-Lie Xiao Key Laboratory of Medicinal Chemistry for Natural Resources Ministry of Education Yunnan Research & Development Center for Natural Products School of Chemical Science and Technology Yunnan University Kunming 650091 People's Republic of China. The Center for Chemical Biology Drug Discovery and Design Center State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Chinese Academy of Sciences Shanghai 201203 People's Republic of China. School of Pharmacy Nanchang University Nanchang 330006 People's Republic of China. State Key Laboratory of CAD&CG Zhejiang University Hangzhou 310058 People's Republic of China. School of Pharmaceutical Sciences Yunnan University of Chinese Medicine Kunming 650500 People's Republic of China. University of Chinese Academy of Sciences Beijing 100049 People's Republic of China.

A spiro -clerodane homodimer with a rare 6/6/6/6/6-fused pentacyclic scaffold, spiroarborin (), together with four new monomeric analogues (-), were isolated from . Their structures were elucidated by comprehensive spectroscopic data analysis, quantum-chemical calculations, and X-ray diffraction. A plausible biosynthetic pathway of was proposed, and a biomimetic synthesis of its derivative was accomplished. Compound showed a potent inhibitory effect by directly binding to the YEATS domain of the 11-19 leukemia (ENL) protein with an IC value of 7.3 μM. This gave a value of 5.0 μM, as recorded by a surface plasmon resonance binding assay.

关键词： High-performance liquid chromatography Peptides and proteins Silica Chemical structure Assays

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Research on Intelligent Supervision Method and System Developing of Soil Remediation Project Based on 3D Mobile GIS 2

Research on Intelligent Supervision Method and System Develo...

引用

2nd International Conference on Biofilms, ChinaBiofilms 2019

作者： Xie, Bin Zhao, Xiangwei Yang, Jun Wang, Qingzhong Pan, Shun Key Laboratory of Geomatics and Digital Technology of Shandong Province Shandong University of Science and Technology Qingdao266590 China Institute of Geographic Science and Natural Resources Research Chinese Academy of Sciences Beijing100864 China

At present, some problems such as inconvenient manual supervision, lack of real-time online supervision and poor online interaction during the implementation of soil remediation project. In order to solve the problems, the supervision method and system development of soil remediation project are studied based on sensing online and 3D mobile GIS technologies. The remediation environment are monitored with fixed sensors online and the heavy metal content are sampled with the mobile sensors. The status of soil remediation site is supervised in real time with video online. All the real-time sensing data are integrated and stored in the comprehensive database. The information of soil pollution and remediation environment is visualized with maps and charts in 3D geographic scenes in the system. In addition, the pollution degree evaluation and remediation effect analysis functions are implemented in system. It is proved with the project practice that the method and system are convenient for managers to monitor the environment on-site and supervise the status of soil remediation site in real time. The informationization and intelligence level of soil remediation project can be effectively improved. © 2019 The Authors, published by EDP sciences.

关键词： Heavy metals

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Pulsar Timing Residual induced by Wideband Ultralight Dark Matter with Spin 0,1,2

arXiv

引用

arXiv 2021年

作者： Sun, Sichun Yang, Xing-Yu Zhang, Yun-Long School of Physics Beijing Institute of Technology Haidian District Beijing100081 China CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Beijing100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing100049 China National Astronomy Observatories Chinese Academy of Science Beijing100101 China School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Hangzhou310024 China International Center for Theoretical Physics Asia-Pacific Hangzhou Beijing China

The coherent oscillation of ultralight dark matter in the mass regime around 10−23 eV induces changes in gravitational potential with the frequency in the nanohertz range. This effect is known to produce a monochromatic signal in the pulsar timing residuals. Here we discuss a multifield scenario that produces a wide spectrum of frequencies, such that the ultralight particle oscillation can mimic the pulsar timing signal of stochastic common spectrum process. We discuss how ultralight dark matter with various spins produces such a wide band spectrum on pulsar timing residuals and perform the Bayesian analysis to constrain the parameters. It turns out that the stochastic background detected by NANOGrav can be associated with a wideband ultralight dark matter. Copyright © 2021, The Authors. All rights reserved.

关键词： Pulsars

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iMetaOmics: Advancing human and environmental health through integrated meta-omics

iMetaOmics

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iMetaOmics 2024年第1期1卷

作者： Chun-Lin Shi Tong Chen Canhui Lan Ren-You Gan Jun Yu Fangqing Zhao Yong-Xin Liu ANGENOVO Oslo Norway State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs National Resource Center for Chinese Materia Medica China Academy of Chinese Medical Sciences Beijing China School of Life Science and Technology Wuhan Polytechnic University Wuhan China R-Institute Co. Ltd. Beijing China Department of Nutrition Singapore Institute of Food and Biotechnology Innovation (SIFBI) Agency for Science Technology and Research (A*STAR) Singapore Singapore Department of Food Science and Nutrition Faculty of Science The Hong Kong Polytechnic University Hong Kong SAR China Institute of Digestive Disease and Department of Medicine and Therapeutics State Key Laboratory of Digestive Disease Li Ka Shing Institute of Health Sciences The Chinese University of Hong Kong Hong Kong SAR China Institute of Zoology Chinese Academy of Sciences Beijing China University of Chinese Academy of Sciences Beijing China Shenzhen Branch Guangdong Laboratory of Lingnan Modern Agriculture Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs Agricultural Genomics Institute at Shenzhen Chinese Academy of Agricultural Sciences Shenzhen Guangdong China

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Multiscale concurrent topology optimization considering transient heat conduction under coupled thermo-mechanical loads

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Aerospace science and technology 2025年

作者： Jian Wang Qing Zhang Yan Zhang Yuanlong Wang Wei-Hsin Liao Qiang Gao School of Mechanical Engineering Southeast University Nanjing China Department of Mechanical and Automation Engineering The Chinese University of Hong Kong Shatin Hong Kong China Eight Academy Cloud Arrow (Beijing) Aerospace Technology Research Institute Co. Ltd Beijing China Key Laboratory of Metallurgical Equipment and Control Technology Ministry of Education Wuhan University of Science and Technology Wuhan China College of Energy and Power Engineering Nanjing University of Aeronautics and Astronautics Nanjing China

Conventional topology optimization under coupled thermo-mechanical loads primarily focuses on the macrostructure, often neglecting the microstructural design, which further limits the design space. Moreover, most approaches deal with steady-state conditions, while transient thermal loading poses a significant computational challenge due to the time-varying temperature field. Thus, this paper proposes a novel multiscale concurrent topology optimization framework specifically tailored for mechanical structures exposed to transient thermo-mechanical loads. The thermo-mechanical response is discretized in time through an implicit finite-difference time-stepping method. Here, the Solid Isotropic Material with Penalization (SIMP) is employed as a material interpolation strategy to represent the evolution of material distribution. On the microscopic scale, an energy-based homogenization method (EBHM) is performed to numerically evaluate the effective elasticity and thermal conductivity of periodic microstructure. The sensitivity analysis is conducted by employing the adjoint variable method, integrated with the discretize-then-differentiate approach to enhance the computational efficiency. Furthermore, the influences of different parameters on the system’s response under transient thermo-mechanical loadings are demonstrated through numerical examples and distributions of the temperature field to validate the methodology. The results indicate that the thermo-mechanical load ratio substantially influences the optimized topology configuration, alongside the thermal response time associated with transient thermal conditions. These findings underscore the critical role of load ratios and transient heat transfer in determining the structural performance and optimization outcomes.

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Anacyphrethines A and B as potent analgesics: Multiple ion channel inhibitors with an unprecedented chemical architecture

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Acta Pharmaceutica Sinica B 2025年

作者： Chen, Hui Zhang, Hanqi Niu, Chao Wang, Bianlin Gao, Biao Liu, Zhijun Yao, Guangmin Aisa, Haji Akber State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization and the Key Laboratory of Chemistry of Plant Resources in Arid Regions Xinjiang Technical Institute of Physics and Chemistry Chinese Academy of Sciences Urumqi 830011 China Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation School of Pharmacy Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China College of Pharmacy Xinjiang Medical University Urumqi 830011 China University of Chinese Academy of Sciences Beijing 10004 China

Multi-target analgesics with minimal side effects and high efficacy are a key research focus in addressing the global pain crisis. Using a molecular networking approach, five pairs of potent analgesic alkaloid enantiomers were isolated from the roots of Anacyclus pyrethrum (A. pyrethrum). Their structures were elucidated by comprehensive spectroscopic data analysis, including LR-HSQMBC and ¹H–¹⁵N HMBC, quantum ¹³C NMR DP4+ and ECD calculations, and single-crystal X-ray diffraction analysis. Anacyphrethines A (1) and B (2) are highly conjugated and polymethylated 6/6/6/6/5/7/5/5-fused octacyclic tetraazabic alkaloids possessing an unprecedented 8,14,18,24-tetraaza-octacyclo[16.8.2.1^1,23.0^4,28.0^5,17.0^9,16.0^11,15.0^21,27] nonacosane motif. Their biosynthetic pathways are proposed involving key aldol, hydroamination, and Schiff base reactions. All isolates showed potent analgesic effects in vivo. Even at a lower dose of 0.2 mg/kg, (±)-1 and (+)-1 still exhibited more potent analgesic activities than morphine. Interestingly, the racemic mixture (±)-1 showed stronger analgesic effect than either pure enantiomer alone at higher doses of 5 and 1 mg/kg;while, (±)-1 showed significant analgesic activities comparable to (+)-1 at lower doses of 0.2 and 0.04 mg/kg. (+)-1 had stronger analgesic effect than (−)-1 at five tested does. Further tests on 44 analgesic-related targets demonstrated that (+)-1 showed significant inhibitory effects against many ion channels such as TRPM8, Kv1.2, Kv1.3, and Ca_v2.1 with IC₅₀ values of 1.10 ± 0.26, 4.20 ± 0.07, 2.20 ± 0.24, and 10.40 ± 0.69 μmol/L, respectively, while (−)-1 primarily inhibited TRPC6, Kv1.2, and Kv1.3 ion channels with IC₅₀ values of 0.81 ± 0.05, 0.91 ± 0.04, and 1.50 ± 0.13 μmol/L, respectively, without affecting the opioid receptors, suggesting their non-opioid analgesic potentials. The molecular

关键词： Alkaloids Anacyclus pyrethrum Analgesics Asteraceae Ion channel blocker Multi-target analgesics Natural products Structure elucidation

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Impacts of bacterivorous nematode identity and abundances on soil greenhouse gas emissions

Climate Smart Agriculture

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Climate Smart Agriculture 2025年第2期2卷

作者： Yao Yu Xianwen Long Yaping Lin Tibor Magura Siqi Wang Xionghui Liao Jiangnan Li Jie Zhao Key Laboratory of Agro-ecological Processes in Subtropical Region Institute of Subtropical Agriculture Chinese Academy of Sciences Changsha 410125 China Huanjiang Agriculture Ecosystem Observation and Research Station of Guangxi Guangxi Key Laboratory of Karst Ecological Processes and Services Huanjiang Observation and Research Station for Karst Ecosystems Chinese Academy of Sciences Huanjiang 547100 Guangxi China University of Chinese Academy of Sciences Beijing 100049 China College of Life and Environmental Science National Engineering Laboratory for Applied Technology in Forestry&Ecology in South China Central South University of Forestry and Technology Changsha 410004 China Department of Ecology Faculty of Science and Technology University of Debrecen H-4032 Debrecen Hungary HUN-REN–UD Anthropocene Ecology Research Group H-4032 Debrecen Hungary

Soil organisms are essential drivers of greenhouse gas (GHG) emissions, with bacterivorous nematodes playing a crucial role in regulating soil carbon and nitrogen cycling processes. These nematodes influence microbial communities and nutrient dynamics, which in turn affect GHG fluxes. However, their species-specific contributions to GHG dynamics remain poorly understood. This study investigated the effects of two bacterivorous nematode species, Protorhabditis spp. and Caenorhabditis elegans on soil GHG emissions using a 20-day microcosm experiment. Seven treatments were established: a control (without nematodes) and inoculations of Protorhabditis spp. or C. elegans at densities of 1, 2, and 3 individuals per gram of dry soil. The results showed that C. elegans significantly increased the cumulative emissions of CO 2 and N 2 O compared to the control. Random forest analysis identified C. elegans abundance was the most critical factor influencing cumulative GHG production. However, Protorhabditis spp. did not significantly affect CO 2 emissions compared to the control, despite its faster population growth rate and higher abundance over the experimental period. The contrasting effects of the two bacterivorous nematodes on GHG emissions highlight the distinct ecological roles of nematode species in regulating soil processes. These findings suggest that nematode species-specific traits exert a greater influence on soil GHG emissions than nematode abundance alone. In addition, the density-dependent effects observed for C. elegans demonstrate that abundance can also be an important determinant of GHG fluxes. This study provides novel insights into the differential roles of bacterivorous nematodes in soil biogeochemical processes and underscores the importance of species composition in regulating soil GHG emissions.

关键词： Bacterivorous nematode Soil carbon Soil nitrogen Greenhouse gas emission Agriculture ecosystem Incubation experiment

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Diversity and Pathogenic Potential of Fungal Communities Along Elevational Gradients in the Everest Glacier

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Research in Cold and Arid Regions 2025年

作者： Tong Ma XinYue Wang ZhiYuan Chen YeTeng Xu Wei Zhang Tuo Chen GuangXiu Liu JunMing Guo ShanJia Li BingLin Zhang School of Life Science and Engineering Lanzhou University of Technology Lanzhou Gansu 730050 China Key Laboratory of Cryospheric Science and Frozen Soil Engineering Yulong Snow Station of Cryosphere and Sustainable Development Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou Gansu 730000 China Key Laboratory of Extreme Environmental Microbial Resources and Engineering Lanzhou Gansu 730000 China Key Laboratory of Desert and Desertification Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou Gansu 730000 China University of Chinese Academy of Sciences No. 19A Yuquan Road Beijing 100049 China

Fungi are a critical member of glacier microbial communities, driving organic matter decomposition, nutrient cycling, and forming symbiotic interactions that help sustain ecosystem stability in extreme conditions. However, the diversity, distribution characteristics, and pathogenic potential of fungal communities in high-altitude glaciers remain poorly understood. In this study, we used Illumina high-throughput sequencing to characterize fungal communities across different elevations of the East Rongbuk Glacier on Mount Everest. A total of 8 phyla, 31 classes, 77 orders, 144 families, 215 genera, and 273 species were identified. The phylum Ascomycota predominated across all elevations. Alpha diversity indices, including Chao1 and Shannon indices, revealed no clear trend with altitude, though beta diversity analyses indicated that geographical factors–latitude, longitude, and altitude–significantly shaped community structure. Canonical correspondence analysis (CCA) and heatmap correlations further demonstrated that environmental variables such as electrical conductivity, total dissolved solids, and nutrient levels were closely associated with specific fungal taxa. Potential pathogenic fungi, such as Basidiobolus microsporus and Fusarium , were identified, suggesting their adaptability to extreme environments and potential health risks. The findings highlight both the ecological significance of fungal communities in glacier ecosystems and the possible implications of climate-induced environmental changes, offering a foundation for future research on the impacts of climate change on glacial biodiversity and public health.

关键词： Mount Everest Glaciers Fungal diversity Altitude Potential pathogenic fungi

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