检索结果-南通市图书馆

Mapping and analyzing the local climate zones in China’s 32 major cities using Landsat imagery based on a novel convolutional neural network

引用

Geo-Spatial Information Science 2021年第4期24卷 528-557页

作者： Xin Huang Anling liu jiayi li School of Remote Sensing and Information Engineering Wuhan UniversityWuhanChina State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhanChina

The Local Climate Zone(LCZ)scheme provides researchers with a standard method to monitor the Urban Heat Island(UHI)effect and conduct temperature *** to generate reliable LCZ maps has therefore become a research *** recent years,researchers have attempted to use Landsat imagery to delineate LCZs and generate maps worldwide based on the World Urban Database and Access Portal Tools(WUDAPT).However,the mapping results obtained by the WUDAPT method are not *** this paper,to generate more accurate LCZ maps,we propose a novel Convolutional Neural Network(CNN)model(namely,LCZ-CNN),which is designed to cope with the issues of LCZ classification using Landsat ***,in this study,we applied the LCZ-CNN model to generate LCZ mapping results for China’s 32 major cities distributed in various climatic zones,achieving a significantly better accuracy than the traditional classification strategies and a satisfactory computational *** pro-posed LCZ-CNN model achieved satisfactory classification accuracies in all 32 cities,and the Overall Accuracies(OAs)of more than half of the cities were higher than 80%.We also designed a series of experiments to comprehensively analyze the proposed LCZ-CNN model,with regard to the transferability of the network and the effectiveness of multiseasonal *** was found that the first convolutional stage,corresponding to low-level features,shows better transferability than the second and third convolutional stages,which extract high-level and more image-or task-oriented *** was also confirmed that the multi-seasonal information can improve the accuracy of LCZ *** thermal characteristics of the different LCZ classes were also analyzed based on the mapping results for China’s 32 major cities,and the experimental results confirmed the close relationship between the LCZ classes and the magnitude of the Land Surface Temperature(LST).

关键词： Deep learning convolutional neural network local climate zone scheme land surface temperature

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Impact of land-cover layout on particulate matter 2.5 in urban areas of China

引用

International Journal of Digital Earth 2020年第4期13卷 474-486页

作者： jiayi li Xin Huang School of Remote Sensing and Information Engineering Wuhan UniversityWuhanHubeiPeople’s Republic of China State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhanPeople’s Republic of China

Urbanization in China is closely connected with ambient particulate matter 2.5(PM_(2.5)).However,the potential for altering PM_(2.5)through the urban landscape characteristics is *** this study,we analyzed the urban PM_(2.5)pollution situation for 2014–2016 and investigated the impact of landscape factors on urban PM_(2.5)in China at the city *** the prefecture-level cities were stratified by urban population size into small(1,000,000),and the other second-level administrative cities were assigned as‘other’*** multivariate regression model including both urban landscape factors and social-economic variables explained 70.0%,32.8%,19.2%,and 12.4%of the arithmetic mean PM_(2.5)concentration(AMC-PM_(2.5))for the other,small,medium,and large cities,*** regard to the configuration of land cover,agricultural activity is a major contributor of PM_(2.5)pollution,for which the explanatory power ranged from 7.6%(for the large cities)to 64%(for the other cities).In addition,grassland aggregation also has a limited but negative effect on urban PM_(2.5)pollution,despite the negligible effect on dry ***,these findings likely reflect the interaction between urban air quality and urbanization,and will have implications for air quality control strategies.

关键词： PM_(2.5) China urban landscape urbanization land cover

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Toward stable and highly reversible zinc anodes for aqueous batteries via electrolyte engineering

引用

Journal of Energy Chemistry 2023年第8期83卷 209-228,I0007页

作者： Ang li jiayi li Yurong He Maochun Wu Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHong Kong 999077China Schoolof Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina

Featuring low cost, high abundance, low electrochemical potential, and large specific capacity, zinc(Zn)metal holds great potential as an anode material for next-generation rechargeable aqueous ***, the poor reversibility resulting from dendrite formation and side reactions poses a major obstacle for its practical application. Electrolyte, which is regarded as the “blood” of batteries, has a direct impact on reaction kinetics, mass transport, and side reactions and thus plays a key role in determining the electrochemical performance of Zn electrodes. Therefore, considerable efforts have been devoted to modulating the electrolytes to improve the performance of Zn electrodes. Although significant progress has been made, achieving stable and highly reversible Zn electrodes remains a critical challenge. This review aims to provide a systematic summary and discussion on electrolyte strategies for highperformance aqueous Zn batteries. The(electro)-chemical behavior and fundamental challenges of Zn electrodes in aqueous electrolytes are first discussed. Electrolyte modulation strategies developed to address these issues are then classified and elaborated according to the underlying ***, remaining challenges and promising future research directions on aqueous electrolyte engineering are highlighted. This review offers insights into the design of highly efficient electrolytes for new generation of rechargeable Zn batteries.

关键词： Rechargeable aqueous zinc batteries Zinc anode Dendrite growth Side reactions Electrolyte engineering

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Metabolomics of astaxanthin hyperaccumulation in Haematococcus pluvialis under high light stress

引用

Journal of Oceanology and limnology 2023年第5期41卷 1876-1886页

作者： Yong DOU jiayi li Wenli ZHOU Tianjin Agricultural University College of FisheriesTianjin Key Lab for Aquaculture Ecology and CultivationTianjin 300384China Tianjin Modern Tianjiao Agricultural Technology Co. Ltd.Tianjin Key Laboratory for Green and Ecological ForageTianjin 301800China

Variation in metabolite profiles of Haematococcus pluvialis(a type of unicellular green algal)under light stress is a key issue of study at the *** investigate the effect of light intensity on accumulation of astaxanthin in ***,a 26-day batch culture experiment of *** under the light intensity levels at 73,127,182,236,and 291μmol/(m^(2)·s)was ***,the optimal light intensity and the corresponding metabolic pathways of accumulation in *** were *** show that 236μmol/(m^(2)·s)was the optimum light intensity to induce astaxanthin accumulation,at which a maximum content of 9.01 mg/L was achieved on Day 24.A total of 132 metabolites were identified and quantified,of which 38 differential metabolites were highlighted and classified,including 3 fatty acids or intermediates,5 amino acids or derivatives,5 carbohydrates or intermediates,16nucleoside derivatives,and 9 other metabolites using LC-MS/MS ***,16 statistically significant differential metabolic pathways were enriched and annotated based on Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway analysis between the control and the 236μmol/(m^(2)·s)treatment group(Plism and signaling systems,such as carbohydrate metabolism,amino acid metabolism,glycerol and derivatives metabolism,nucleotide and derivative metabolism,and inositol phosphate metabolism were activated and regulated under strong light stress ***,4 hub metabolites containing D-glucose-6-phosphate,L-tyrosine,glycerol-3-phosphate,and L-glutamine were identified,based on which the associated metabolic network was *** study provided a metabolomic view of astaxanthin accumulation in *** under strong light stress.

关键词： Haematococcus pluvialis astaxanthin high light stress metabolomic analysis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Deep neural network for remote-sensing image interpretation: status and perspectives

引用

National Science Review 2019年第6期6卷 1082-1086页

作者： jiayi li Xin Huang Jianya Gong School of Remote Sensing and Information Engineering Wuhan University State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan University

Deep neural networks(DNNs) refer to end-to-end mappings(i.e. from data to information) by stacking a large number of filters learned from massive samples. By courtesy of the comprehensive Earth observation platforms and convenient data access, remote-sensing practitioners are dealing with very large and ever-growing data volumes, which call for fast and transferrable machine-learning

关键词： status and perspectives image Deep neural network for remote-sensing image interpretation

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

30m global impervious surface area dynamics and urban expansion pattern observed by Landsat satellites: From 1972 to 2019

引用

Science China Earth Sciences 2021年第11期64卷 1922-1933页

作者： Xin HUANG jiayi li Jie YANG Zhen ZHANG Dongrui li Xiaoping liU School of Remote Sensing and Information Engineering Wuhan UniversityWuhan 430079China State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhan 430079China Guangdong Key Laboratory for Urbanization and Geo-simulation School of Geography and PlanningSun Yat-Sen UniversityGuangzhou 510006China

Using more than three million Landsat satellite images,this research developed the first global impervious surface area(GISA)dataset from 1972 to *** on 120,777 independent and random reference sites from 270 cities all over the world,the omission error,commission error,and F-score of GISA are 5.16%,0.82%,and 0.954,*** to the existing global datasets,the merits of GISA include:(1)It provided the global ISA maps before the year of 1985,and showed the longest time span(1972–2019)and the highest accuracy(in terms of a large number of randomly selected and third-party validation sample sets);(2)it presented a new global ISA mapping method including a semi-automatic global sample collection,a locally adaptive classification strategy,and a spatio-temporal post-processing procedure;and(3)it extracted ISA from the whole global land area(not from an urban mask)and hence reduced the ***,on the basis of GISA,the long time series global urban expansion pattern(GUEP)has been calculated for the first time,and the pattern of continents and representative countries were *** two new datasets(GISA and GUEP)produced in this study can contribute to further understanding on the human’s utilization and reformation to nature during the past half century,and can be freely download from http://***/resources/***.

关键词： Landsat Urban Google earth engine Impervious area Urban expansion

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

STAT3-Decoy ODN Inhibits Cytokine Autocrine of Murine Tumor Cells

引用

Cellular & Molecular Immunology 2007年第4期4卷 309-313页

作者： Xi liu jiayi li Jian Zhang School of Pharmaceutical Sciences Shandong University Jinan 250012 China

Tumor cells usually secrete soluble factors to improve their proliferation via autocrine network or to escape from immune surveillance by inhibiting antitumor immunity, among these factors IL-10 and IL-6 play more important roles. Since both cytokines＇ signal transductions are mediated through the STAT3 pathway, STAT3 becomes an attractive target for tumor therapy. In present study, STAT3 of murine tumor cell lines B16 and MCA-38 was constitutively activated. After treatment with STAT3-decoy ODN, the proliferation of these tumor cells was inhibited and the transcription of IL-10 or IL-6 in tumor cells was down-regulated. These results suggested that STAT3 is a good target candidate, and STAT3-decoy ODN may possibly be used as a strategy for breaking both tumor autocrine network and tumor immunotolerance.

关键词： oligodeoxynucleotide decoy STAT3 cytokine

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A review of Space-Air-Ground integrated remote sensing techniques for atmospheric monitoring

引用

Journal of Environmental Sciences 2023年第1期123卷 3-14页

作者： Bin Zhou Sanbao Zhang Ruibin Xue jiayi li Shanshan Wang Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP3) Department of Environmental Science and EngineeringFudan UniversityShanghai 200433China Institute of Eco-Chongming(IEC) Shanghai 202162China Zhuhai Fudan Innovation Institute Zhuhai 519000China Institute of Atmospheric Sciences Fudan UniversityShanghai 200433China

Currently,the three-dimensional(3D)distribution and characteristics of air pollution cannot be understood based on the application of any single atmospheric monitoring ***-term,high-precision and large-scale 3D atmospheric monitoring might become practical by combining heterogeneous modern technologies;for this purpose,the SpaceAir-Ground integrated system is a promising *** this system,optical remote sensing technologies employing fixed or mobile platforms are used as the main means for groundbased *** balloons,unmanned aerial vehicles(UAV)and airborne platforms serve as the air-based observation *** final part,satellite remote sensing,corresponds to space-based *** from obtaining the 3D distribution of air pollution,research on emission estimation and pollution mechanisms has been extensively implemented based on the strengths of this system or some portion of ***,further research on the fusion of multi-source data,optimization of inversion algorithms,and coupling with atmospheric models is of great importance to the realization of this system.

关键词： Space-Air-Ground Atmospheric monitoring 3D distribution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

High-performance spherical liVPO4F/C cathode enabled by facile spray pyrolysis

引用

Science China(Technological Sciences) 2020年第12期63卷 2729-2734页

作者： DING XiaoBo ZHOU YongMao YAN GuoChun li jiayi WANG JieXi School of Metallurgy and Environment Central South UniversityChangsha 410083China Middle School Attached to Central South University Changsha 410083China State Key Laboratory for Powder Metallurgy Central South UniversityChangsha 410083China

liVPO4F suffers problems of difficulty in synthesis and poor conductivity. To solve these,herein sub-micro spherical liVPO4F/C is synthesized from a highly-reactive hollow VPO4/C sphere that is derived from a facile and fast spray pyrolysis for the first time. Uniform carbon coating layer with a thickness of 5–8 nm is observed on the surface of the particles,helping to improve the electronic conductivity,suppress the particle growth and protect the particles from corrosion by the electrolyte. The particles are shaped as fine sub-micro spheres,which are beneficial for shortening the distance for li+ transport. Rietveld refinement for the X-ray diffraction pattern of as-prepared sample shows high-purity triclinic liVPO4F with an enlarged lattice volume,enabling faster li+ transport in the prepared material. Accordingly,the resulted liVPO4F/C demonstrates superior electrochemical properties,delivering 135.4,91.1 mA hg-1 at 1,40 C respectively,and remaining the capacity of 93.3 mA hg-1 after 500 cycles at 20 C with the retention of 95.0%. The method introduced here provides an efficient way to address the serious problems of preparing high-purity li VPO4F with good conductivity.

关键词： lithium ion battery cathode material spray pyrolysis liVPO4F carbon coating

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of torularhodin against acetaminophen induced liver injury base on antioxidation, anti-inflammation and anti-apoptosis

引用

Food Bioscience 2023年第2期52卷 575-583页

作者： jiayi li He Qian Fuwei Pi State Key Laboratory of Food Science and Technology School of Food Science and TechnologyJiangnan UniversityWuxiJiangsu214122People’s Republic of China School of Biotechnology Jiangnan UniversityWuxiJiangsu214122People’s Republic of China Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province Jiangnan UniversityWuxiJiangsu214122People’s Republic of China

Oxidative stress,inflammatory,and excessive apoptosis are the crucial culprits of drug-induced liver injury(DIli).Torularhodin was judged to have good potential to intervene DIli due to its antioxidant and immunomodulation *** aim of this study was to clarify the preventive effect of torularhodin on hepatic injury caused by acetaminophen(APAP)and its mechanism in *** liver injury model of mice was established by injecting APAP into the tail’s veins to evaluate the intervention effect of torularhodin on liver *** mechanisms involved were investigated using Western blot and transcriptome *** results reflected that torularhodin significantly increased antioxidant enzyme capacities(Compared with the group Dam,the activities of SOD and GSH-Px in the group TorH increased by2.47 and 3.79 times,and the content of MDA decreased by 58.78%,respectively pliver in *** result indicated that differential genes caused by the intervention of torularhodin were mainly involved in cell metabolism processes,immunomodulation and *** blot results confirmed that torularhodin could inhibit hepatocyte apoptosis by regulating signaling pathways including PI3K/Akt/mTOR and Nrf2/HO-1 to increase antioxidant enzyme activity,thus intervening in *** suggested that torularhodin might provide a promising preventive strategy for DIli.

关键词： Torularhodin Anti-inflammation Transcriptome analysis Apoptosis signaling pathway

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：