检索结果-南通市图书馆

Journal of Energy Chemistry 2024年第5期92卷 521-533页

作者： Zhijie Zhang xuesheng Wang Junyi Qian Jiayue xu School of Materials Science and Engineering Shanghai Institute of TechnologyShanghai 201418China

Heterojunction construction,especially S-scheme heterojunction,represents an efficient universal strategy to achieve high-performance photocatalytic *** further performance stimulation of these well-designed heterojunctions,modulating the interfacial internal electric field(IEF)to steer dynamic charge transfer represents a promising ***,we realized the precise regulation of Fermi level(E_(F))of the oxidation semiconductor(mesoporous WO_(3-x))by tailoring the concentration of oxygen vacancies(V_(O)),maximizing the IEF intensity in Cs_(2)CuBr_(4)@WO_(3-x)(CCB@WO_(3-x))S-scheme *** augmented IEF affords a robust driving force for directional electron delivery,leading to boosted charge ***,the developed CCB@WO_(3-x)S-scheme heterojunction demonstrated outstanding photocatalytic CO_(2)reduction performance,with the electron consumption rate(Relectron)up to 390.34μmol g^(-1)h^(-1),which is 3.28 folds higher than that of pure *** in-depth analysis of the S-scheme electron transfer mode was presented via theoretical investigations,electron spin resonance(ESR),photo-irradiated Kelvin probe force microscopy(KPFM),and in-situ X-ray photoelectron spectroscopy(XPS).Finally,the CO_(2)photoconversion route was explored in detail using in-situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)and DFT theoretical calculations.

关键词： Cs_(2)CuBr_(4) WO_(3-x) Oxygen vacancy S-scheme heterojunction Internal electricfield

Understanding Discrepancy of Power System Dynamic Security Assessment with Unknown faults: A Reliable Transfer Learning-based Method

在线全文

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2024年第1期10卷 427-431页

作者： Chao Ren Han Yu Yan xu Zhao Yang Dong School of Computer Science and Engineering Nanyang Technological UniversitySingapore School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore

This letter proposes a reliable transfer learning(RTL)method for pre-fault dynamic security assessment(DSA)in power systems to improve DSA performance in the presence of potentially related unknown *** takes individual discrepancies into consideration and can handle unknown faults with incomplete *** experiment results demonstrate high DSA accuracy and computational efficiency of the proposed RTL *** analysis shows RTL can guarantee system performance.

关键词： Adversarial training dynamic security assessment maximum classifier discrepancy missing data transfer learning

Sulfur vacancies and heterogeneous interfaces promote high performance sodium storage of bimetallic chalcogenide hollow nanospheres

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 Energy Chemistry 2024年第8期95卷 596-610,I0013页

作者： Shiyue Cao Xiaoting xu Qiming Liu Huijuan Zhu Ting Hu Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education School of Physics and TechnologyWuhan UniversityWuhan 430072HubeiChina

Transition metal sulfides have high theoretical capacities and are considered as potential anode materials for sodium-ion ***,due to low inherent conductivity and significant volume expansion,the electrochemical performance is greatly *** this study,a nickel/manganese sulfide material(Ni_(0.96)S_(x)/MnS_(y)-NC)with adjustable sulfur vacancies and heterogeneous hollow spheres was prepared using a simple *** introduction of a concentration-adjustable sulfur vacancy enables the generation of a heterogeneous interface between bimetallic sulfide and sulfur *** interface collectively creates an internal electric field,improving the mobility of electrons and ions,increasing the number of electrochemically active sites,and further optimizing the performance of Na~+*** direction of electron flow is confirmed by Density functional theory(DFT)*** hollow nano-spherical material provides a buffer for expansion,facilitating rapid transfer *** innovative discovery involves the interaction between the ether-based electrolyte and copper foil,leading to the formation of Cu_9S_5,which grafts the active material and copper current collector,reinforcing mechanical *** results in a new heterostructure of Cu_9S_5 with Ni_(0.96)S_(x)/MnS_(y),contributing to the stabilization of structural integrity for long-cycle ***,Ni_(0.96)S_(x)/MnS_(y)-NC exhibits excellent electrochemical properties following our modification *** stability performance,Ni0_(.96)S_(x)/MnS_(y)-NC demonstrates an average decay rate of 0.00944%after 10,000 cycles at an extremely high current density of 10000 mA g^(-1),A full cell with a high capacity of 304.2 mA h g^(-1)was also successfully assembled by using Na_(3)V_(2)(PO_(4))_(3)/C as the *** study explores a novel strategy for interface/vacancy co-modification in the fabrication of high-performance sodium-ion batteries electrode.

关键词： Sulfur vacancies Heterogeneous interface Interactions Sodium ion batteries

Polyethylenimine-modified graphene quantum dots promote endothelial cell proliferation

在线全文

学校读者我要写书评

暂无评论

Regenerative Biomaterials 2024年第2期3卷 137-146页

作者： Qirong xu Chen Li Xiangyan Meng Xinghong Duo Yakai Feng School of Chemistry and Chemical Engineering Qinghai University for NationalitiesXining 810007PR China Key Laboratory of National Ethnic Affairs Commission of Resource Chemistry and Ecological Environment Protection on Qinghai-Tibet Plateau Xining 810007PR China institute of Disaster and Emergency Medicine Tianjin UniversityTianjin 300072PR China School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350PR China Key Laboratory of Systems Bioengineering(Ministry of Education) Tianjin UniversityTianjin 300072PR China

Endothelial cell proliferation plays an important role in angiogenesis and treatment of related *** aim of this study was to evaluate the effect of polyethylenimine(PEI)-modified graphene quantum dots(gQDs)gene vectors on endothelial cell *** gQDs-cationic polymer gene vectors were synthesized by amidation reaction,and used to deliver pzNF580 gene to Human umbilical vein endothelial cells(HUVECs)for promoting their *** chemical modification of gQDs can ad-just gene vectors'surface properties and charge distribution,thereby enhancing their interaction with gene molecules,which could effectively compress the pZNF580 *** CCK-8 assay showed that the cell viability was higher than 80%at higher vector concentration(40μg/mL),demonstrating that the gQDs-cationic polymer gene vectors and their gene complex nanoparticles(NPs)having low *** results of the live/dead cell double staining assay were consistent with those of the CCK-8 assay,in which the cell viability of the A-gQDs/pZNF580(94.38±6.39%),C-gQDs-PEI-polylactic acid-co-polyacetic acid(PLgA)/pZNF580(98.65±6.60%)and N-gQDs-PEI-PLgA/pZNF580(90.08±1.60%)groups was significantly higher than that of the Lipofectamine 2000/pzNF580(71.98±3.53%)positive treatment *** results of transfection and western blot experiments showed that the vector significantly enhanced the delivery of plasmid to HUVECs and increased the expression of pZNF580 in *** addition,the gene NPs better promote endothelial cell migration and *** cell migration rate and proliferation ability of C-gQDs-PEI-PLgA/pZNF580 and N-gQDs-PEI-PLgA/pZNF580 treatment groupS were higher than those of Lipofectamine 2000/pDNA treatment *** gQDs possess the potential to serve as efficient gene *** tightly bind gene molecules through charge and other non-covalent interactions,significantly improving the effciency of gene delivery and ensuring the smooth release of genes with

关键词： graphene quantum dots polyethylenimine ZNF580 gene endothelial cell proliferation

To be or not to be direct:The role of neuromedin U in neuro-eosinophil crosstalk

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science Bulletin 2024年第2期69卷 148-150页

作者： Ruichao Liu Wenhao Shao Jun xu Coco Chu SXMU-Tsinghua Collaborative Innovation Center for Frontier Medicine Taiyuan 030001China Insttute for Immunogy Department of Basic Medical SciencesSchool of Medicinesinghua UnierstyBejing 100084China Tsinghua-Peking Center for Life Sciences Tsinghua UniversityBeijing 100084China Shanxi Medical University Taiyuan 030012China Department of Surgery First Hospital of Shanxi Medical UniversityShanxi Provincial Key Laboratory for Digestive Diseases and Organ TransplantationTaiyuan 030001China Beijing Key Laboratory for Immunological Research on Chronic Diseases Tsinghua UniversityBejing 100084China

With the development of new experimental techniques(e.g.,single-cell RNA sequencing(scRNA-seq),light sheet microscopy,and clustered regularly interspaced palindromic repeats(CRISPR)/CRISPR-associated protein 9(Cas9),emerging studies have begun to uncover the interactions between the nervous system and the immune system,both in health and *** example,in mucosal tissues such as the lung and the intestine,neurotransmitters including acetylcholine[1]and adrenaline[2]can directly regulate the immune cell functions thus affect the results of allergy,asthma,and anti-pathogen host defense[3].

关键词： intestine lung asthma

A Survey of Edge Caching:Key Issues and Challenges

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2024年第3期29卷 818-842页

作者： Hanwen Li Mingtao Sun fan Xia Xiaolong xu Muhammad Bilal School of Computer Science Nanjing University of Information Science and TechnologyNanjing 210044China Shandong Provincial University Laboratory for Protected Horticulture Weifang University of Science and TechnologyWeifang 262700China Reading Academy Nanjing University of Information Science and TechnologyNanjing 210044China School of Software Nanjing University of Information Science and TechnologyNanjing 210044China Department of Computer Engineering Hankuk University of Foreign StudiesYongin-si 17035Republic of Korea

With the rapid development of mobile communication technology and intelligent applications,the quantity of mobile devices and data traffic in networks have been growing exponentially,which poses a great burden to networks and brings huge challenge to servicing user *** caching,which utilizes the storage and computation resources of the edge to bring resources closer to end users,is a promising way to relieve network burden and enhance user *** this paper,we aim to survey the edge caching techniques from a comprehensive and systematic *** first present an overview of edge caching,summarizing the three key issues regarding edge caching,i.e.,where,what,and how to cache,and then introducing several significant caching *** then carry out a detailed and in-depth elaboration on these three issues,which correspond to caching locations,caching objects,and caching strategies,*** particular,we innovate on the issue“what to cache”,interpreting it as the classification of the“caching objects”,which can be further classified into content cache,data cache,and service ***,we discuss several open issues and challenges of edge caching to inspire future investigations in this research area.

关键词： edge caching edge computing caching location caching object caching strategy 5g networkarchitecture Internet of Things(IoT)

Metal–phenolic coordination crystals derived magnetic hollow carbon spheres for ultrahigh electromagnetic wave absorption

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第3期17卷 1616-1624页

作者： Hanxiao xu Zizhuang He Yiruo Wang Xiangru Ren Panbo Liu School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi’an 710129China

Owing to the tunable compositions and versatile functionality,the development of eco-friendly metal–phenolic coordination crystals derivatives is highly anticipated for electromagnetic wave *** this study,three kinds of magnetic hollow carbon spheres(HCSs)with macro-meso-microporous characteristics,including Fe/HCS,Co/HCS,and CoNi/HCS,are successfully fabricated via the co-operative hard template and self-assembling process,in which magnetic particles are encapsulated in carbon shell matrix after the pyrolysis of metal–polyphenol coordination crystals and further subsequent template *** the one hand,hierarchical macro-meso-micropores effectively balance the impedance gap between absorbers and air and introduce structural defects or distortion,leading to matched impedance and enhanced dipolar/defect *** the other hand,wrapped magnetic particles provide uncountable hetero-interfaces and induce ferromagnetic resonance,resulting in strengthened interfacial polarization and additional magnetic *** particular,enhanced minimum reflection loss(RL,min)and broadband effective absorption bandwidth(EAB)are achieved with only 10 wt.%filler ***,the RL,min and EAB values are-57.5 dB and 7.2 gHz for Fe/HCS,-50.0 dB and 5.8 gHz for Co/HCS,and-52.1 dB and 6.7 gHz for CoNi/HCS,***,this work provides us a modular-assembly strategy to regulate the hollow cavity of absorbers and simultaneously manipulates the chemical components of absorbers to regulate electromagnetic wave absorption performance.

关键词： hollow engineering hierarchical pores hetero-interfaces synergetic effect electromagnetic wave absorption

Analysis of fatty Acid in Biological Samples Using Liquid Chromatography–Quadrupole-Orbitrap Mass Spectrometry Under Parallel Reaction Monitoring Mode

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 Analysis and Testing 2024年第2期8卷 210-217页

作者： Jingxuan Yang Wenjun guo Xiaohang xu Liang Zhao Yajuan xu Yang Wang School of Pharmaceutical Sciences Changchun University of Chinese MedicineChangchun130117China Key Laboratory of Medicinal Materials Jilin Academy of Chinese Medicine SciencesChangchun130021China Jilin ginseng Academy Changchun University of Chinese MedicineChangchun130117China

fatty acids(fas)are an important class of functional small molecules and participate in a variety of life biological *** experiment proposed a liquid chromatography–quadrupole-Qrbitrap mass spectrometry(LC–Q-Orbitrap MS)method to perform fa profiling under parallel reaction monitoring(PRM)acquisition *** fa was derivatized by 2-dimethylaminoethylamine(DMED)to increase the ionization e fficiency and provide the characterized fragment *** mass spectra obtained from full scan,multiple ion monitoring(MIM),and PRM were *** results showed that the protonated ion of fa+DMED–H2O was detected and the neutral loss of 45.06 Da was observed in the tandem mass *** PRM method provided the highest selectivity and sensitivity for fa detection with the help of accurate mass weight and specific neutral loss-based *** method validation was performed using the fa standards and pooled quality control serum sample,which showed that the established method had good repeatability,stability,and ***,the developed method was successfully applied to analyze the rat serum and brain tissue samples for the drug e ffi-cacy evaluation of gross saponin of Tribulus terrestris ***(gSTTF)against middle cerebral artery occlusion(MCAO)-induced ischemic *** method has extensive practicability and great potential in the detection of fa,especially for the analysis of samples with complex matrices.

关键词： fatty acid Derivatization LC-Q-Orbitrap MS Parallel reaction monitoring Biological sample

Association between gut microbiota and hepatocellular carcinoma and biliary tract cancer:A mendelian randomization study

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2024年第18期12卷 3497-3504页

作者： Ye Zhang fa-Ji Yang Qi-Rong Jiang Heng-Jun gao Xie Song Hua-Qiang Zhu xu Zhou Jun Lu Department of Hepatobiliary Surgery Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250013Shandong ProvinceChina

BACKgROUND An increasing number of studies have begun to discuss the relationship between gut microbiota and diseases,yet there is currently a lack of corresponding articles describing the association between gut microbiota and hepatocellular carcinoma(HCC)and biliary tract cancer(BTC).This study aims to explore the relationship between them using Mendelian randomization(MR)analysis *** To assess the relationship between gut microbiota and HCC and *** We obtained genome-wide association study(gWAS)data for the gut microbiome from the intestinal microbiota genomic library(MiBiogen,https://***/).Additionally,we accessed data pertaining to HCC and BTC from the IEU open gWAS platform(https://***/).Our analysis employed fundamental instrumental variable analysis methods,including inverse-variance weighted,MR and *** ensure the dependability of the results,we subjected the results to tests for multiple biases and *** During our investigation,we discovered 11 gut microbiota linked to an increased risk to BTC and *** former included the genus Eubacterium hallii group(P=0.017),Candidatus Soleaferrea(P=0.034),Flavonifractor(P=0.021),Lachnospiraceae FCS020(P=0.034),the order Victivallales(P=0.018),and the class Lentisphaeria(P=0.0.18).The latter included the genus Desulfovibrio(P=0.042),Oscillibacter(P=0.023),the family Coriobacteriaceae(P=0.048),the order Coriobacteriales(P=0.048),and the class Coriobacteriia(P=0.048).Furthermore,in BTC,we observed 2 protective gut microbiota namely the genus Dorea(P=0.041)and Lachnospiraceae ND3007 group(P=0.045).All results showed no evidence of multiplicity or *** This study explores a causal link between gut microbiota and HCC and *** insights may enhance the mechanistic knowledge of microbiota-related HCC and BTC pathways,potentially informing therapeutic strategies.

关键词： Hepatocellular carcinoma Biliary tract cancer gut microbiota Mendelian randomization genetic variant

How topography and neighbor shape the fate of trees in subtropical forest restoration:Environmental filtering and resource competition drive natural regeneration

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Forest Ecosystems 2024年第1期11卷 73-86页

作者： Haonan Zhang Xingshuo Zhang Yingying Lv Yanyan Ni Baokun xu Xiangnan Han Xiao Cao Qingpei Yang Wanggu xu Zhedong Qian Innovative Research Team for Forest Restoration Mechanisms Nanjing Institute of Environmental SciencesMinistry of Ecology and Environment(MEE)Nanjing 210042China College of Forestry Jiangxi Agricultural UniversityNanchang 330045China

The structure of plant communities at local scales depends on both the spatial heterogeneity of abiotic environmental factors and the biotic interactions within the ***,although environmental filtering due to microtopographic heterogeneity and resource competition among plants caused by spatial variation in tree density and size are considered to be very important in explaining the mechanisms of community assembly,their effects on the processes of individual mortality and recruitment in natural forest regeneration,as well as their relative contributions,are still poorly *** address this,we established a 12-ha permanent plot in a subtropical evergreen broad-leaved forest area and measured microtopographic variables such as elevation,slope,aspect,and terrain position index(TPI)using a total *** monitored the individual mortality and recruitment in forest natural regeneration through repeated surveys at 5-year *** fitted spatial covariance models to jointly use multiple factors from three groups of variables(microtopographic effect,neighborhood density effects,neighborhood size effects)as explanatory variables to analyze their roles in driving the mortality and recruitment of all individual and 12 dominant species in forest natural regeneration at the neighborhood *** results show that:(1)In the crucial early stages of secondary forest restoration,natural regeneration is influenced by a synergy of environmental filtering,due to microtopographic heterogeneity,and resource competition among plants.(2)For distinct species responses,evergreen dominant species'mortality is largely explained by neighborhood effects,while deciduous species are more affected by topographic ***,the adverse effects of larger conspecific trees on younger trees indicate a pattern of competitive pressure leading to mortality among regenerating trees,such pattern emphasis the influence of parent trees on natural regeneration.(3)As trees g

关键词： Natural regeneration Microtopography Neighborhood effects Mortality and recruitment