检索结果-南通市图书馆

Single Zn atoms anchored on hollow carbon nanofiber network for dendrite-free lithium metal anode of flexible Li–S full cell

引用

Rare Metals 2023年第11期42卷 3705-3717页

作者： Zhi-Feng Wang Hong-Ying Wang Xiao-Li Liu Yan-Xu Chen Yan Zhao Yong-Guang Zhang Qi-Qi Han Chun-Ling Qin Zhumabay Bakenov Yi-Chao Wang Xin Wang School of Materials Science and Engineering Hebei University of TechnologyTianjin300401China School of Materials Science and Engineering Hebei University of Science and TechnologyShijiazhuang050018China south china Academy of Advanced Optoelectronics and International Academy of Optoelectronics at Zhaoqing South China Normal UniversityGuangzhou510006China Shanxi Supercomputing Center Lvliang033000China Department of Chemical and Materials Engineering National Laboratory AstanaNazarbayev University010000Nur-SultanKazakhstan School of Life and Environmental Sciences Deakin UniversityWaurn PondsGeelongVIC3216Australia

The attractive energy density of lithium-sulfur(Li-S)batteries makes them desirable energy storage systems;however,the slow reaction kinetics and formation of lithium dendrites prevent them from reaching full *** address this issue,hierarchical porous carbon nanofibers network containing Zn single atoms(ZnSA@HPCNF)is synthesized by electrospinning and *** structure serves as the main anode body,providing excellent chemical anchoring and *** uniform distribution of Zn single atoms and N4coordination supports uniform deposition and continuous plating/stripping of *** results show that the Li|Li/ZnSA@HPCNF symmetrical battery presents stable and low overpotential during 700-and 900-h iterative plating/stripping process at1 and 5 mA·cm^(-2),***,the S/CNT||Li/ZnSA@HPCNF full cell shows good flexibility,reversible capacity and cycling *** work provides a lithium host strategy based on single-atom dispersed hierarchical porous carbon network,enabling the design of rational lithium metal anodes for use in flexible Li-S full cells.

关键词： Single atom Lithium metal anode Lithium deposition Lithium-sulfur battery

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 Novel Binary Firefly Algorithm for the Minimum Labeling Spanning Tree Problem

引用

Computer Modeling in Engineering & Sciences 2020年第10期125卷 197-214页

作者： Mugang Lin Fangju Liu Huihuang Zhao Jianzhen Chen college of Computer Science and technology Hengyang Normal UniversityHengyang421002China Hunan Provincial Key Laboratory of Intelligent Information Processing and Application Hengyang421002China School of Computer Science University of South ChinaHengyang421001China

Given a connected undirected graph G whose edges are labeled,the minimumlabeling spanning tree(MLST)problemis to find a spanning tree of G with the smallest number of different *** is anNP-hard combinatorial optimization problem,which is widely applied in communication networks,multimodal transportation networks,and data *** approximation algorithms and heuristics algorithms have been proposed for the *** algorithm is a new meta-heuristic *** of its simplicity and easy implementation,it has been successfully applied in various ***,the basic firefly algorithm is not suitable for discrete *** this end,a novel discrete firefly algorithm for the MLST problem is proposed in this paper.A binary operation method to update firefly positions and a local feasible handling method are introduced,which correct unfeasible solutions,eliminate redundant labels,and make the algorithm more suitable for discrete *** results show that the algorithm has good *** algorithm can be extended to solve other discrete optimization problems.

关键词： Minimum labeling spanning tree problem binary firefly algorithm meta-heuristics discrete optimization

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

Resampling Factor Estimation via Dual-Stream Convolutional Neural Network

引用

Computers, Materials & Continua 2021年第1期66卷 647-657页

作者： Shangjun Luo Junwei Luo Wei Lu Yanmei Fang Jinhua Zeng Shaopei Shi Yue Zhang School of Data and Computer Science Guangdong Province Key Laboratory of Information Security TechnologyMinistry of Education Key Laboratory of Machine Intelligence and Advanced ComputingSun Yat-sen UniversityGuangzhou510006China Academy of Forensic Science Shanghai200063China college of Information Science and technology Jinan UniversityGuangzhou510632China Department of Computer Science University of Massachusetts LowellLowellMA 01854USA

The estimation of image resampling factors is an important problem in image *** all the resampling factor estimation methods,spectrumbased methods are one of the most widely used methods and have attracted a lot of research ***,because of inherent ambiguity,spectrum-based methods fail to discriminate upscale and downscale operations without any prior *** general,the application of resampling leaves detectable traces in both spatial domain and frequency domain of a resampled ***,the resampling process will introduce correlations between neighboring *** this case,a set of periodic pixels that are correlated to their neighbors can be found in a resampled ***,the resampled image has distinct and strong peaks on spectrum while the spectrum of original image has no clear ***,in this paper,we propose a dual-stream convolutional neural network for image resampling factors *** of the two streams is gray stream whose purpose is to extract resampling traces features directly from the rescaled *** other is frequency stream that discovers the differences of spectrum between rescaled and original *** features from two streams are then fused to construct a feature representation including the resampling traces left in spatial and frequency domain,which is later fed into softmax layer for resampling factor *** results show that the proposed method is effective on resampling factor estimation and outperforms some CNN-based methods.

关键词： Image forensics image resampling detection parameter estimation convolutional neural network

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

Stable carbon isotope evidence for tracing the diet of the host Hepialus larva of Cordyceps sinensis in the Tibetan Plateau

引用

Science china Earth Sciences 2009年第5期52卷 655-659页

作者： CHEN Di YUAN JianPing XU ShiPing ZHOU XiaoGang ZHANG Yan XU XiaoMing ZOU ZhiWen ZHANG GuRen WANG JiangHai State Key Laboratory of Bio-control College of Life SciencesSun Yat-Sen UniversityGuangzhou 510275China School of Marine Sciences Sun Yat-Sen UniversityGuangzhou 510006China State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China R&D Center Guangzhou Enenta Electrical Equipment Co.LtdGuangzhou 510635China

Two types of Hepialus larvae with different diets were distinguished in the Sejila Mountain,Tibetan Plateau based on the stable carbon isotope data of the host Hepialus larva of Cordyceps sinensis and its closely adjacent tender plant roots and humus *** I is the larva chiefly fed by soil humus,and characterized by the δ 13C values of -22.6‰ to-23.4‰,and more than -23.4‰ in its *** II is the larva chiefly fed by tender plant roots,and characterized by the δ 13C values of-24.6‰ to -27.6‰,and less than -24.6‰ in its *** result has exceeded the traditional understanding that their food sources only come from the tender plant roots,and may provide evidence for choosing cheap and high-quality foods and further establishing artificial habitats in their large-scale reproduction.

关键词： stable carbon isotopes host Hepialus larva of Cordyceps sinensis humus substances Tibetan Plateau

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

Spatio-temporal variation of Fraction of Photosynthetically Active Radiation absorbed by vegetation in the Hengduan Mountains, china

引用

Journal of Mountain Science 2021年第4期18卷 891-906页

作者： YANG Zheng-lan ZHANG Ting-bin YI Gui-hua LI Jing-ji QIN Yan-bin CHEN Yang college of Earth Science Chengdu University of TechnologyChengdu 610059China State Environmental-Protection Key Eaboratory of Synergetic Control and Joint Remediation for Soil&Water Pollution Chengdu University of TechnologyChengdu 610059China college of Tourism and Urban-Rural Planning Chengdu University of TechnologyChengdu 610059China college of ecological environment Chengdu University of TechnologyChengdu 610059China

The Fraction of Absorbed Photosynthetically Active Radiation(FPAR) is an important indicator of the primary productivity of vegetation. FPAR is often used to estimate the assimilation of carbon dioxide in vegetation. Based on MOD15 A2 H/FPAR data product, the temporal and spatial variation characteristics and variation trend of FPAR in different vegetation types in 2001 to 2018 were analyzed in the Hengduan Mountains. The response of FPAR to climate change was investigated by using Pearson correlation analytical method and partial least squares regression analysis. Results showed that the FPAR in Hengduan Mountains presented an increasing trend with time. Spatially, it was high in the south and low in the north, and it also showed obvious vertical zonality by elevation *** vegetation FPAR was found to be positively correlated with air temperature and sunshine duration but negatively correlated with precipitation. Partial least squares regression analysis showed that the influence of sunshine duration on vegetation FPAR in Hengduan Mountains was stronger than that of air temperature and precipitation.

关键词： FPAR Climate change Correlation analysis Partial least squares regression analysis(PLS) Hengduan Mountains

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

Transparent glassy composites incorporating lead-free anti-perovskite halide nanocrystals enable tunable emission and ultrastable X-ray imaging

引用

Advanced Photonics 2023年第4期5卷 23-32页

作者： Yakun Le Xiongjian Huang Hao Zhang Zhihao Zhou Dandan Yang Bozhao Yin Xiaofeng Liu Zhiguo Xia Jianrong Qiu Zhongmin Yang Guoping Dong south china university of technology School of Materials Science and EngineeringState Key Laboratory of Luminescent Materials and DevicesGuangzhouChina south china university of technology School of Physics and OptoelectronicsGuangzhouChina Zhejiang university School of Materials Science and EngineeringHangzhouChina Zhejiang university College of Optical Science and EngineeringState Key Laboratory of Modern Optical InstrumentationHangzhouChina

Lead halide perovskite materials exhibit excellent scintillation performance,which,however,suffer from serious stability and toxicity *** contrast,the heavy metal-free anti-perovskite materials[MX_(4)]XA_(3)(A=alkali metal;M=transition metal;X=Cl,Br,I),a class of electron-inverted perovskite derivatives,exhibit robust structural and photophysical ***,we design and prepare a lead-free[MnBr_(4)]BrCs_(3) anti-perovskite nanocrystal(NC)-embedded glass for efficient X-ray-excited luminescence with high-resolution X-ray imaging with a spatial resolution of 19.1 Ip mm^(-1).Due to the unique crystal structure and the protection of the glass matrix,the Cs_(3)MnBr_(5) NC-embedded glass exhibits excellent X-ray irradiation stability,thermal stability,and water *** merits enable the demonstration of real-time and durable X-ray radiography based on the developed glassy *** work could stimulate the research and development of novel metal halide anti-perovskite materials and open a new path for future development in the field of high-resolution and ultrastable X-ray imaging.

关键词： lead-free metal halides anti-perovskite nanocrystals glass ultrastable X-ray imaging

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

Feeder assignment optimization algorithm for multi-head mounter

引用

控制理论与应用（英文版） 2006年第3期4卷 223-228页

作者： Peng YUAN Yueming HU Haiming LIU Hongxia GAO college of Automation Science and Engineering South China University of Technology Guangzhou Guangdong 510640 China

This paper analyzes optimization algorithms of assembly time for a multi-head mounter. The algorithm in this paper is composed of four steps. First, it assigns the components to feeders based on the ＂one-to-many mapping＂. Secondly, it assigns nozzles to heads by making full use of the ＂on-the-fly nozzle change＂ heads. Thirdly, it Qrganizes the feeder groups so that the heads can pick and place components group by group. Finally, it assigns feeder groups to slots. The result demonstrates that the algorithm has good performance in practice.

关键词： Mounter Feeder assignment Optimization

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

Background levels of OCPs,PCBs,and PAHs in soils from the eastern Pamirs,china,an alpine region influenced by westerly atmospheric transport

引用

Journal of Environmental Sciences 2022年第5期34卷 453-464页

作者： Yang Ding Huanfang Huang Wei Chen Yuan Zhang Wenwen Chen Xinli Xing Shihua Qi State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesWuhan 430074China School of Environmental Studies China University of GeosciencesWuhan 430074China Department of Physical and Environmental Sciences University of Toronto ScarboroughTorontoONM1C 1A4Canada State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China college of Environmental Science and Engineering Guilin University of TechnologyGuilin 541004China

Long-range atmospheric transport(LRAT)plays a crucial role in the occurrence of persis-tent organic pollutants(POPs)in remote *** studying the LRAT of POPs on the Tibetan Plateau,westerly-controlled regions have received insufficient attention compared with regions influenced by the Indian monsoon or air flow from East *** investigated the residual levels of POPs in soils from the eastern Pamirs and used air backward trajectory analysis to elucidate the influence of potential source regions via *** pes-ticides(OCPs,mainly comprising DDTs,HCHs,and HCB),polychlorinated biphenyls(PCBs,mainly comprising penta-and hexa-CBs),and polycyclic aromatic hydrocarbons(PAHs,mainly comprising three-and four-ring)were detected at low concentrations of 40-1000,china and India.

关键词： Persistent organic pollutants Long-range atmospheric transport Westerlies Tibetan Plateau Remote regions

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

Construction of algal-bacterial consortia using green microalgae Chlorella vulgaris and As(Ⅲ)-oxidizing bacteria:As tolerance and metabolomic profiling

引用

Journal of Environmental Sciences 2024年第5期139卷 258-266页

作者： Xiaoman He Guobing Lin Jiayuan Zeng Zhaoguang Yang Lin Wang college of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety Central South UniversityChangsha 410083China

Bioremediation became a promising technology to resolve arsenic(As)contamination in aquatic *** monoculture such as microalgae or bacteria was sensitive to environmental disturbance and vulnerable to contamination,green microalgae Chlorella vulgaris and arsenite(As(Ⅲ))-oxidizing bacteria Pseudomonas ***11 were co-cultured to construct algal-bacterial consortia in the current *** effects of algae-bacteria(A:B)ratio and exposure As(Ⅲ)concentration on algal growth,As speciation and metabolomic profile were *** growth arrested when treated with 100 mg/L As(Ⅲ)without the co-cultured *** contrast,co-cultured with strain SMS11 significantly enhanced As tolerance in *** especially with A:B ratio of 1:*** the As(Ⅲ)in culture media of the consortia were oxidized into As(Ⅴ)on day *** of As was observed on day *** 1% and 0.5% of total As were converted into dimethylarsinic acid(DMA)after 21days cultivation when the initial concentrations of As(Ⅲ)were 1 and 10 mg/L,*** analysis was further performed to reveal the response of consortia metabolites to external As(Ⅲ).The enriched metabolomic pathways were associated with carbohydrate,amino acid and energy *** acid cycle and glyoxylate and dicarboxylate metabolism were upregulated under As stress due to their biological functions on alleviating oxidative stress and protecting *** carbohydrate and amino acid metabolisms provided precursors and potential substrates for energy production and cell protection under abiotic *** of the pathways relevant to carbohydrate or amino acid metabolism were triggered by energy requirement.

关键词： Microalgae Algal-bacterial consortia As(Ⅲ)-oxidizing bacteria Metabolomics Energy metabolism

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

One-pot synthesis of 5-hydroxymethylfurfural from glucose over zirconium doped mesoporous KIT-6

引用

Chinese Journal of Chemical Engineering 2018年第6期26卷 1270-1277页

作者： Chongwen Jiang Jundong Zhu Bing Wang Lu Li Hong Zhong college of Chemistry and Chemical Engineering Central south university Changsha 410083 China Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources Central South University Changsha 410083 China

Zirconium doped mesoporous KIT-6 samples with different Si/Zr ratios were synthesized by the direct hydrothermal *** characterization techniques confirm that highly distributed ZrO_2 nanoparticles and multicoordinated Zr^(4+) species are incorporated in the mesoporous ***-pot synthesis of 5-hydroxymethylfurfura(HMF) from glucose was examined in the presence of Zr-KIT-6(20) the molar ratio of Si to Zr is 20 under aqueous *** effects of temperature,reaction time,catalyst dosage and biphasic solvent system on the conversion of glucose and the HMF yield were *** was found that the glucose conversion and the HMF yield have been improved from 54.8% to 79.0% and from 19.5% to 34.5% in the biphasic MIBK-water system,*** the acidity of Zr-KIT-6(20) and the biphasic MIBK-water system are responsible for the improved performance of glucose dehydration to HMF.

关键词： Glucose One-pot Dehydration 5-HMF Hydrothermal Mesoporous KIT-6

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

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：