检索结果-南通市图书馆

1T Phase Transition Metal Dichalcogenides for Hydrogen Evolution Reaction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Electrochemical Energy Reviews 2021年第2期4卷 194-218页

作者： Liang Chang Zhuxing Sun yun hang hu Department of Materials Science and Engineering Michigan Technological UniversityHoughtonMI 49931‑1295USA

Metallic(1T)phases of transition metal dichalcogenides(TMDs)are promising alternatives for Pt as efficient and practically applicable hydrogen evolution reaction(HER)*** 61T TMDs are the most widely studied due to their impressively higher HER activity than that of their 2H ***,the mediocre electrochemical and thermal stability of these TMDs has limited their widespread *** the last decade,while immense attempts have been made to enhance the stability of group 61T TMDs,1T TMDs based on other transition metals have gained increasing *** address the great potential of the 1T TMD family for industry-scale HER and inspire future breakthroughs in realizing their scalable utilization,a critical overview of 1T TMDs for application in HER is presented in this *** an emphasis on the recent progress,the main contents include the elucidation of the“structure–performance”relationship in 1T TMD-based HER,the approaches for the synthesis and morphology control of 1T TMDs,and the types of 1T TMD-based materials that have been explored for efficient and long-term water *** the main discussions,the reaction mechanism of HER and the evaluation indexes for HER catalysts are ***,future perspectives on overcoming the primary challenges that hinder the practical application of 1T TMDs for HER are provided.

关键词： Transition metal dichalcogenides 1T phase Hydrogen evolution reaction Electrocatalysis

3D Graphene Materials from the Reduction of CO2

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Accounts of Materials Research 2021年第1期2卷 48-58页

作者： Zhuxing Sun yun hang hu Department of Materials Science and Engineering Michigan Technological UniversityHoughtonMichigan 49931-1295United States

CONSPECTUS:The content of carbon dioxide(CO2)in the atmosphere has been continuously growing and threatens the global environment by contributing to the greenhouse *** conversion of CO2 directly into value-added chemicals could not only reduce CO2 emission but also make valuable use of the waste ***,achieving a highly efficient CO2 conversion with high product selectivity and low energy cost remains a great ***,one of the most important engineering materials with a wide range of applications,is generally synthesized with valuable hydrocarbons as carbon *** versatile graphene materials directly from CO2 is intriguing and of profound ***,it is of critical importance to produce 3D-structured graphene materials,which can avoid the restacking of the graphene sheets and thus keep the graphene properties for practical ***-metal-based exothermic reactions with inorganic carbon compounds,which have been discovered by our group since 2013,offer ideal solutions for efficient CO2 utilization and cost-effective 3D graphene *** the reactions,alkali metal salts formed simultaneously with the graphenization of CO2 and served as in situ templates for creating the splendid microscale 3D structured graphene materials,which could hardly be achieved using other ***,the etching effect of CO2 molecules can realize controlled engineering of unique surface porous structures of the formed 3D ***,diverse 3D graphene materials featuring fascinating properties that are desired for energy-related and environmental applications can be facilely obtained by tuning the conditions for the reactions of CO2 with alkali *** Account provides an overview of the 3D graphene materials from the reduction of CO2 via the state-of-the-art alkali-metalchemistry-based *** an emphasis on the significance of the CO2-to-graphene conversion process,the alkali-metal-based chemistry fo

关键词： alkali walls thermodynamics

Enhanced photocatalytic CO_(2) hydrogenation with wide-spectrum utilization over black TiO_(2) supported catalyst

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2022年第2期33卷 812-816页

作者： Binbin Jin Xin Ye Heng Zhong Fangming Jin yun hang hu School of Environmental Science and Engineering State Key Lab of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240China Center of Hydrogen Science Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China Department of Materials Science and Engineering Michigan Technological UniversityHoughtonMichigan 49931-1295United States

Light-driven conversion of CO_(2)into chemicals/fuels is a desirable approach for achieving carbon neutral-ity using clean and sustainable ***,its scale-up application is restricted due to insufficient ***,we present a photothermal catalytic hydrogenation of CO_(2)into CH_(4)over Ru/black TiO_(2) catalysts,aiming to achieve the synergistic use of light and heat in solar energy during CO_(2)*** to the desirable spectral response ability and photothermal conversion performance of black TiO_(2),an efficient combination of photocatalysis and thermocatalysis has been *** CO_(2)hydrogena-tion was signiﬁcantly accelerated because of the increased catalyst surface temperature enabled by the photothermal effect of black TiO_(2).Simultaneously,through the in situ X-ray photoelectron spectroscopy(XPS)observation,electron-rich Ru nanoparticles was achieved based on the photo-induced excitation,thereby providing more negative hydride to improve nucleophilic attack to the CO_(2),obtaining the CH_(4) yield of 93.8%.

关键词： Photothermal Black TiO_(2) CO_(2) Electron-rich Hydrogenation

Is it possible to foot reflexology for infants with sensorineural hearing loss?

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2025年第2期13卷 1-4页

作者： Min Ai hang-hang Zhang Jun-Bang Feng Chuan-Ming Li Wen-Jing Wang Meng-Die hu Department of Anesthesiology Nanan District People's Hospital of ChongqingChongqing 400060China Department of Breast and Thyroid Surgery Chongqing Bishan District Maternal and Child Health Care HospitalChongqing 402760China Department of Medical Imaging Chongqing University Central HospitalChongqing 400014China

Foot reflexology is a non-invasive and safe complementary therapy that works by massaging the reflex zones of the feet and exerts systemic or whole-body regulation through meridian nerve *** therapy is commonly used in the treatment of various conditions such as autism and Parkinson's ***,there is limited reporting on the use of foot reflexology therapy for infants with sensorineural hearing loss(SNHL).Currently,there is no definitive conclusion on how foot reflexology therapy can influence *** editorial holds some guiding significance regarding this clinical *** aim is to present physiological evidence of how foot reflexology therapy can impact infants with SNHL,thereby enhancing clinician’s awareness of foot reflexology in treating infants with SNHL.

关键词： Foot reflexology Sensorineural Hearing Loss Future perspectives Limitations Neural conduction

P granules phase transition induced by cytoplasmic streaming in Caenorhabditis elegans embryo

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 China(Physics,Mechanics & Astronomy) 2017年第1期60卷 55-61页

作者： hang Wang Guohui hu Shanghai Institute of Applied Mathematics and Mechanics Shanghai Key Laboratory of Mechanics in Energy EngineeringShanghai UniversityShanghai 200072China

P granules are germ granules contained in Caenorhabditis elegans germ *** first germ cell is specified by the one-cell embryo in which P granules localize to the *** studies suggested that the mechanism of the localization phenomena is induced by liquid-liquid phase transition(LLPT),in which the polarity proteins control the saturation point of P *** the present study,we propose that the P granules phase transition can be triggered by the cytoplasmic streaming.A two-phase flow model is employed to simulate the localization of P granules,i.e.,the cytoplasm is considered as a liquid phase,and the droplet-like P granules are another liquid *** the presence of the cytoplasmic streaming,P granules,initially distributing uniformly in the entire one-cell embryo,eventually condense/dissolve in the cytoplasm phase,regulated by difference between the saturation pressure and the hydrodynamic *** numerical results reveal that the cytoplasmic streaming has significant effects on the localization of P granules,as well as the embryo division.

关键词： liquid-liquid phase transition cytoplasmic streaming

Two-Type Information Fusion Based IP-to-AS Mapping Table Refining

在线全文

学校读者我要写书评

暂无评论

Journal of Computer Science & Technology 2017年第3期32卷 571-584页

作者： Qing Jiang hang-Yu hu Guang-Min hu School of Communication and Information Engineering University of Electronic Science and Technology of China Chengdu 611731 China

The Internet topology at the autonomous system （AS） level is of great importance, and traceroute has been known to be a potential tool to obtain a complete AS topology. The original IP-to-AS mapping table maps the IP addresses in traceroute paths to their origin ASes, which may cause false AS links. The existing methods refine the original mapping table based on traceroute-BGP path pairs or alias resolution data. However, the information extracted from either of them is inaccurate and incomplete. In this paper, we present a two-type information fusion based method to refine the original mapping table. We extract four kinds of information from path pair and alias resolution data. Based on these information, we build a candidate AS set for each router. Then we choose the AS that is consistent with the existing information to be the owner AS of each router and map all of the IP addresses on the router to it. We validate the result with the ground truth from PeeringDB and Looking Glass severs. Compared with the existing methods, our method produces a more accurate mapping table. In addition, we discuss the coverage of our method and show that our method is convergent and more robust against the reduction of information or the increase of incorrect information.

关键词： network topology Internet routers BGP traceroute

Some Remarks on Teichmüller Spaces and Modular Groups

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2009年第8期25卷 1289-1296页

作者： yun hu Department of Mathematics Soochow University Suzhou 215006 P. R. China

We study the fixed point sets of subgroups of modular groups acting on Teichmiiller spaces.

关键词： Teichmiiller space modular group allowable mapping

Gut Bacterial and Lactobacilli Communities of Weaning Piglets in Response to Mannan Oligosaccharide and Sugar Beet Pulp In vitro Fermentation

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2012年第1期11卷 122-133页

作者： hang Su-qin Zhu Wei-yun Laboratory of Gastrointestinal Microbiology Nanjing Agricultural UniversityNanjing 210095P.R.China

Microbiota in the gastrointestinal tract （GIT） of piglets during weaning transition can experience a sharp change which could result in growth reduction and diarrhea of weaned piglets. Dietary manipulations can play an important role in attenuating such changes caused by weaning stress. Therefore, ileal and colonic contents of weaned piglets were used as inocula, mannan oligosaccharide （MOS） or sugar beet pulp （SBP） was supplied as single energy sources to investigate effects of MOS or SBP on the shifts of gastro-intestinal microflora and lactobacilli populations. The universal bacteria- and lactobacilli-specific PCR/denaturing gradient gel electrophoresis （DGGE）, cloning and sequencing techniques were used. DGGE profiles of the universal bacteria showed that great changes were found in the position, numbers and intensity of dominant bands after fermentation. The similarity of bacterial community between ileum and colon was increased to 85-97% by MOS or SBP treatment after fermentation from the similarity with 20% before fermentation. MOS treatment significantly increased the bacterial diversity and band number in both ileal and colonic fermentation （P〈0.05）. SBP treatment significantly increased the bacterial diversity and band number in colon （P〈0.05）. It implies that some species were enriched by the addition of MOS or SBP to increase the similarity and diversity of bacterial community in weaned piglets. Five specific bands appearing in MOS or SBP treatment group after fermentation were cloned and sequenced, the changes of species related to Prevotella and Ruminococcus were observed. Two bands related to uncultured bacterium with 98% similarity were detected by MOS or SBP treatment. However, there were no effects on the similarity, diversity index and lactobacilli species revealed by MOS or SBP treatment. These results imply that MOS or SBP could have beneficial effects on the weaning piglets by stablizing microbiota in the GIT microflora.

关键词： mannan oligosaccharide (MOS) sugar beet pulp (SBP) bacterial communities lactobacilli weaning piglets

Fail-safe topology optimization of continuum structures with fundamental frequency constraints based on the ICM method

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2020年第5期36卷 1065-1077,I0003页

作者： Jia-Zheng Du Fan-Wei Meng yun-hang Guo yun-Kang Sui College of Mechanical Engineering and Applied Electronics Technology Beijing University of TechnologyBeijing 100124China State Key Laboratory of Structural Analysis for Industrial Equipment.Department of Engineering Mechanics Dalian University of TechnologyDalian 116023China

It is an important topic to improve the redundancy of optimized configuration to resist the local failure in topology optimization of continuum *** a fail-safe topology optimization problem has been solved effectively in the ficld of *** this paper,the fail-safe topology optimization problem is extended to the field of frequency topology *** on the independent continuous mapping(ICM)method,the model of fail-safe topology optimization is established with the objective of minimal weight integrating with the discrete condition of topological variables and the constraint of the fundamental *** fail-safe optimization model established above is substituted by a sequence of subproblems in the form of the quadratic program with exact second-order information and solved efficiently by the dual sequence quadratic programming(DSQP)*** numerical result reveals that the optimized fail-safe structure has more complex configuration and preserved materials than the structure obtained from the traditional frequency topology optimization,which means that the optimized fail-safe structure has higher ***,the optimized fail-safe structure guarantees that the natural frequency meets the constraint of fundamental frequency when the local failure ocurs,which can avoid the structural frequency to be sensitive to local *** fail-safe optimirzation topology model is proved effective and feasible by four numerical examples.

关键词： Fail-safe Frequency constraints Topology optimization Independent continuous mapping method