检索结果-内蒙古大学图书馆

A study on periodic boundary condition in direct numerical simulation for gas–solid flow

Chinese Journal of Chemical engineering 2020年第1期28卷 236-241页

作者： Shiwen Liu Xiaowen Liu Feiguo Chen Limin Wang Wei Ge State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China

Direct numerical simulation(DNS) of gas–solid flow at high resolution has been carried out by coupling the lattice Boltzmann method(LBM) for gas flow and the discrete element method(DEM) for solid particles. However,the body force periodic boundary condition(FPBC) commonly used to cut down the huge computational cost of such simulation has faced accuracy concerns. In this study, a novel two-region periodic boundary condition(TPBC) is presented to remedy this problem, with the flow driven in the region with body force and freely evolving in the other region. With simulation cases for simple circulating fluidized bed risers, the validity and advantages of TPBC are demonstrated with more reasonable heterogeneity of the particle distribution as compared to the corresponding case with FPBC.

关键词： Direct numerical simulation Periodic boundary condition Two-region periodic boundary condition Gas–solid flow Heterogeneity

来源：评论

学校读者我要写书评

暂无评论

Simultaneous hydrogen production with photo reforming of lactic acid over MXene derived MoS_(2)/TiO_(2)/Ti_(3)C_(2)nanowires

引用

Chinese Journal of Catalysis 2025年第4期71卷 234-245页

作者： Seemal Mansoor Zixu Hu Yuxin Zhang Muhammad Tayyab Mazhar Khan Zeeshan Akmal Liang Zhou Juying Lei Muhammad Nasir Jinlong Zhang Key Laboratory for Advanced Materials Shanghai Engineering Research Center for Multi–media Environmental Catalysis and Resource UtilizationJoint International Research Laboratory of Precision Chemistry and Molecular EngineeringFeringa Nobel Prize Scientist Joint Research CenterSchool of Chemistry and Molecular EngineeringEast China University of Science&TechnologyShanghai 200237China National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical ProcessEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090HeilongjiangChina Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China Institute of Materials Research Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055GuangdongChina COMSATS Univ Islamabad Interdisciplinary Res Ctr Biomed Mat IRCBMLahore CampusLahore 54000Pakistan

Developing efficient photocatalysts to address collaborative energy and environmental crises still faces significant *** this report,we present a highly efficient MXene–based photocatalyst,which is combined with MoS_(2)nano patches and TiO_(2)/Ti_(3)C_(2)(TTC)nanowires through hydrothermal *** all the composites tested,the optimized photocatalyst gave a remarkable H_(2)and revolving polylactic acid(PLA)into pyruvic acid(PA).Achieving a remarkable H_(2)evolution rate of 637.1 and 243.2μmol g^(−1)h^(−1),in the presence of TEOA and PLA as a sacrificial reagent under UV-vis(λ≥365 nm)light *** improved photocatalytic activity is a result of the combination of dual cocatalyst on the surface of TTC photocatalyst,which create an ideal synergistic effect for the generation of PA and the production of H_(2)*** MoS_(2)TiO_(2)/Ti_(3)C_(2)(MTT)composite can generate more photoexcited charge carriers,leading to the generation of more active radicals,which may enhance the system's photocatalytic *** work aims at demonstrating its future significance and guide the scientific community towards a more efficient approach to commercializing H_(2)through photocatalysis.

关键词： Photo reforming Polylactic acid Hydrogen evolution Lactic acid Pyruvic acid

来源：评论

学校读者我要写书评

暂无评论

Influence of 3d Pores in Ceramics Layer on the Tgo Failure Mechanism of Thermal Barrier Coatings

SSRN

引用

SSRN 2023年

作者： Yang, Ming Wang, Xueying Feng, Wei Fu, Yongjun Jiang, Yufeng Chen, Feng Li, Ming Chen, Yue School of Materials Science and Engineering Hubei Polytechnic University Hubei435003 China State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China

Yttria partially stabilized zirconia sprayed by the air-plasma-spraying method is widely used to protect superalloy substrates due to its unique thermomechanical properties, but the formation and development of thermally grown oxide (TGO) often causes crack propagation in thermal barrier coatings and leads to accidents. In this paper, the effects of the thickness of the TGO layer and the porosity on the heat insulation properties and surface residual stress between the ceramic layer and TGO layer of TBCs fabricated by atmospheric plasma spraying were studied. Finite element calculations are used to study the thickness of TGO layers with different porosities after thermal shock, the thermal insulation performance of coatings at high temperature and the three-dimensional distribution of thermal strain, especially at the interface between the lower ceramic layer and upper TGO layer. The results show that when the porosity of the ceramic coating is approximately 24.35%, the thermal insulation performance and the maximum von Mises stress of the coating are optimized, and the coating has the longest service life. Theoretically, this paper is of great significance in revealing the influence of porosity control on the service life of the coating. © 2023, The Authors. All rights reserved.

关键词： Porosity

来源：评论

学校读者我要写书评

暂无评论

Cu2o Nanoparticles with Controlled Surface Roughness for Co2 Electroreduction Towards C2+ Products

SSRN

引用

SSRN 2024年

作者： Fang, Qi Zhang, Zining Yang, Xue Cheng, Tao Ma, Xinyan Tang, Jing State Key Laboratory of Petroleum Molecular & Process Engineering Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal University Shanghai200062 China Sinopec Research Institute of Petroleum Processing Co. LTD. Beijing100083 China Institute of Eco-Chongming Shanghai202162 China

Electrocatalytic CO2 reduction to produce multi-carbon (C2+) products represents a promising avenue for carbon recycling and CO2 conversion industrialization. However, improving C2+ selectivity remains challenging due to uncontrollable reaction pathways. Adjusting the surface properties of the catalyst can effectively influence the nature of the active sites and the branching of the reaction pathways. Herein, we successfully synthesized of Cu2O catalysts with different degrees of roughness by adjusting the amount of surfactant, a structure-directing agent. The optimal catalyst, indicated a remarkable FEC2+ of 84.2% at -1.4 V vs. RHE, with an ethylene selectivity of 56.3% and C2+ partial current density of 416.4 mA cm-2 in a flow cell. In-situ ATR-FTIR spectroscopy and COMSOL simulations revealed that *CO intermediates tend to desorb from the rough surface, thereby promoting the formation of CO. In contrast, flat catalyst surfaces facilitate the adsorption of carbon intermediates and C-C coupling, resulting in an enhancement of C2+ products. This work not only refines the structure-activity relationship between catalyst surface roughness and products selectivity, but also offers strategies for designing efficient catalysts from the perspective of surface properties. © 2024, The Authors. All rights reserved.

关键词： Surface roughness

来源：评论

学校读者我要写书评

暂无评论

Enhanced roasting of lepidolite for high defluorination efficiency in a fluidized bed reactor

引用

Particuology 2020年第5期18卷 28-35页

作者： Jun Li Jing Kong Qingshan Zhu Hongzhong Li State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China

Defluorination roasting of lepidolite ore in a fluidized bed reactor has been proposed for improving the extraction efficiency of *** this paper,a vacuum was introduced to the fluidized bed reactor,which significantly improved the defluorination efficiency of lepidolite *** improvement could be attributed to an increase in the H2O/HF *** highest defluorination rate for the lepidolite particles was obtained in the fluidized bed reactor under *** rate in the vacuum reactor was 1.5-2 times that in a fixed bed reactor or conventional fluidized bed *** defluorination efficiency of the lepidolite particles also improved and the consumption of steam was greatly reduced by addition of coal *** enhancement was mainly attributed to changes in the structures of the reduced lepidolite *** defluorination roasting method for high lithium extraction with low water steam consumption is a promising method for lithium ore treatment.

关键词： Vacuum fluidized bed Defluorination roasting Lepidolite Lithium

来源：评论

学校读者我要写书评

暂无评论

Pear genomes display significant genetic diversity and provide novel insights into the fruit quality traits differentiation

引用

Horticultural Plant Journal 2024年第6期10卷 1274-1290页

作者： Baopeng Ding Haifei Hu Yunpeng Cao Ruirui Xu Yujing Lin Tahir ul Qamar Muhammad Yuqin Song Guangqi He Youzhi Han Huangping Guo Jun Qiao Jianguo Zhao Xinxin Feng Sheng Yang Xuhu Guo Rajeev Kumar Varshney Liulin Li Engineering Research Center of Coal-Based Ecological Carbon Sequestration Technology of the Ministry of Education and Key Laboratory of National Forest and Grass Administration for the Application of Graphene in Forestry Shanxi Datong UniversityDatongShanxi 037009China College of Horticulture Shanxi Agricultural UniversityTaiguShanxi 030801China Rice Research Institute&Guangdong Key Laboratory of New Technology in Rice Breeding Guangdong Academy of Agricultural SciencesGuangzhouGuangdong 510640China CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture Wuhan Botanical GardenChinese Academy of SciencesWuhanHubei 430074China College of Biology and Oceanography Weifang UniversityWeifangShandong 261061China Integrative Omics and Molecular Modeling Laboratory Department of Bioinformatics and BiotechnologyGovernment College University Faisalabad(GCUF)Faisalabad 38000Pakistan State Key Laboratory of Plant Physiology and Biochemistry College of Life SciencesZhejiang UniversityHangzhouZhejiang 310058China College of Forestry Shanxi Agricultural UniversityTaiguShanxi 030801China Pomology Institute Shanxi Agricultural UniversityTaiguShanxi 030801China School of Life Sciences Shanxi Datong UniversityDatongShanxi 037009China Centre for Crop&Food Innovation State Agricultural Biotechnology CentreFood Futures InstituteMurdoch UniversityWestern AustraliaPerth 6000Australia

The pear(Pyrus spp.)is well known for diverse flavors,textures,and global horticultural ***,the genetic diversity responsible for its extensive phenotypic variations remains largely ***,we de novo assembled and annotated the genomes of the maternal(PsbM)and paternal(PsbF)lines of the hybrid‘Yuluxiang'pear and constructed the pear pangenome of 1.15 Gb by combining these two genomes with five previously published pear genomes representing cultivated and wild *** the constructed pangenome,we identified 21224 gene PAVs(Presence-absence variation)and 1158812 SNPs(Single Nucleotide Polymorphism)in the non-reference genome that were absent in the PsbM reference *** with SNP markers,PAV-based analysis provides additional insights into the pear population *** addition,some genes associated with pear fruit quality traits have differential occurrence frequencies and differential gene expression between Asian and European ***,our analysis of the pear pangenome revealed a mutated SNP and an insertion in the promoter region of the gene PsbMGH3.1 potentially enhance sepal shedding in‘Xuehuali'which is vital for pear ***3.1 may play a role in the IAA pathway,contributing to a distinct low-auxin phenotype observed in plants by heterologously overexpressing this *** research helps capture the genetic diversity of pear populations and provides genomic resources for accelerating breeding.

关键词： Pear Phased diploid genome Pangenome PAV Fruit quality

来源：评论

学校读者我要写书评

暂无评论

In situ establishment of Co/MoS_(2) heterostructures onto inverse opal‐structured N,S‐doped carbon hollow nanospheres:Interfacial and architectural dual engineering for efficient hydrogen evolution reaction

引用

SmartMat 2021年第4期2卷 591-602页

作者： Tingyu Lu Tongfei Li Desheng Shi Jialin Sun Huan Pang Lin Xu Jun Yang Yawen Tang Jiangsu Key Laboratory of New Power Batteries School of Chemistry and Materials ScienceNanjing Normal UniversityNanjingJiangsuChina 2 School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhouJiangsuChina Nanjing IPE Institute of Green Manufacturing Industry NanjingJiangsuChina State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijingChina

Rational design of low‐cost and high‐efficiency non‐precious metal‐based catalysts toward the hydrogen evolution reaction(HER)is of paramount significance for the sustainable development of the hydrogen *** manipulationinduced electronic modulation represents a sophisticated strategy to enhance the intrinsic activity of a non‐precious ***,we demonstrate the straightforward construction of Co/MoS_(2) hetero‐nanoparticles anchored on inverse opal‐structured N,S‐doped carbon hollow nanospheres with an ordered macroporous framework(denoted as Co/MoS_(2)@N,S-CHNSs hereafter)via a templateassisted *** experimental evidence and theoretical calculations reveal that the formation of Co/MoS_(2) heterojunctions can effectively modulate the electronic configuration of active sites and optimize the reaction pathways,remarkably boosting the intrinsic ***,the inverse opal‐structured carbon substrate with an ordered porous framework is favorable to enlarge the accessible surface area and provide multidimensional mass transport channels,dramatically expediting the reaction *** to the compositional synergy and structural superiority,the fabricated Co/MoS_(2)@N,S-CHNSs exhibit excellent HER activity with a low overpotential of 105mV to afford a current density of 10 mA/cm^(2).The rationale of interface manipulation and architectural design herein is anticipated to be inspirable for the future development of efficient and earth‐abundant electrocatalysts for a variety of energy conversion systems.

关键词： heterostructures hydrogen evolution reaction inversed opal structure MoS_(2)

来源：评论

学校读者我要写书评

暂无评论

Vertically aligned Ni/NiO nanocomposites with abundant oxygen deficient hetero-interfaces for enhanced overall water splitting

引用

Science China Chemistry 2022年第10期65卷 1885-1894页

作者： Hongxia Wang Meiyan Cui Gaoliang Fu Jiaye Zhang Xingyu Ding Irene Azaceta Matthew Bugnet Demie M.Kepaptsoglou Vlado K.Lazarov Victor Ade la Peña O’Shea Freddy E.Oropeza Kelvin H.L.Zhang State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Henan Provincial Key Laboratory of Nanocomposites and Applications Institute of Nanostructured Functional MaterialsHuanghe Science and Technology CollegeZhengzhou 450006China Department of Physics University of YorkHeslingtonYorkYO105DDUK SuperSTEM Laboratory SciTech Daresbury CampusDaresbury WA44ADUK School of Chemical and Process Engineering Univeristy of LeedsLeeds LS29JTUK Univ Lyon CNRSINSA LyonUCBLMATEISUMR 551069621 VilleurbanneFrance Photoactivated Processes Unit IMDEA Energy InstituteParque Tecnológico de MóstolesAvda.Ramón de la Sagra 328935 MóstolesMadridSpain

The design of heterostructured transition metal-based electrocatalysts with controlled composition and interfaces is key to increasing the efficiency of the water electrolysis and the elucidation of reaction *** this work,we report the synthesis of well-controlled vertically aligned Ni/NiO nanocomposites consisting of Ni nanoclusters embedded in NiO,which result in highly efficient electrocatalysts for overall water *** show that such a high catalytic efficiency toward both the hydrogen evolution reaction(HER)and the oxygen evolution reaction(OER)originates from a synergetic effect at Ni/NiO interfaces that significantly reduces the energy barrier for water dissociation,and favours the formation of reactive H*intermediates on the Ni side of the interface,and OH_(ads) on the NiO side of the interface.A study of water chemisorption based on near-ambient pressure photoelectron spectroscopy indicates that the abundant hetero-interfaces in Ni/NiO nanocomposite promote the dissociation of water with a three-fold increase in the surface concentration of OH_(ads) compared with pure *** functional theory calculations indicate that Ni/NiO interface leads to the reduction of the water dissociation energy barrier due to a high concentration of oxygen vacancies at NiO side of the interface,whereas the formation of highly active metallic Ni sites with an optimal value of Gibbs free energy of H*(ΔG_(H*)=−0.16 eV)owes to a favourable adjustment of the electron energetics at the interface,thus accelerating the overall electrochemical water splitting.

关键词： water splitting hydrogen evolution reaction electronic structure heterostructure vertically aligned nanocomposites

来源：评论

学校读者我要写书评

暂无评论

Integrated dynamic wet spinning of core-sheath hydrogel fibers for optical-to-brain/tissue communications

引用

国家科学评论（英文版） 2021年第9期8卷 83-94页

作者： Guoyin Chen Gang Wang Xinrong Tan Kai Hou Qingshuo Meng Peng Zhao Shun Wang Jiayi Zhang Zhan Zhou Tao Chen Yanhua Cheng Benjamin S.Hsiao Elsa Reichmanis Meifang Zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China State Key Laboratory of Medical Neurobiology MOE Frontiers Center for Brain ScienceInstitute of Brain ScienceDepartment of OphthalmologyZhongshan HospitalFudan UniversityShanghai 200032China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Department of Chemistry Stony Brook UniversityStony BrookNY 11794USA School of Chemical and Biomolecular Engineering School of Chemistry and BiochemistrySchool of Materials Science and EngineeringGeorgia Institute of TechnologyAtlantaGA 30332USA

Hydrogel optical light-guides have received substantial interest for applications such as deep-tissue biosensors,optogenetic stimulation and photomedicine due to their biocompatibility,(micro)structure control and tissue-like Young's ***,despite recent developments,large-scale fabrication with a continuous synthetic methodology,which could produce core-sheath hydrogel fibers with the desired optical and mechanical properties suitable for deep-tissue applications,has yet to be *** this study,we report a versatile concept of integrated light-triggered dynamic wet spinning capable of continuously producing core-sheath hydrogel optical fibers with tunable fiber diameters,and mechanical and optical propagation ***,this concept also exhibited versatility for various kinds of core-sheath functional *** wet spinning synthetic procedure and fabrication process were optimized with the rational design of the core/sheath material interface compatibility[core =poly(ethylene glycol diacrylate-co-acrylamide);sheath =Ca-alginate],optical transparency,refractive index and spinning solution *** resulting hydrogel optical fibers exhibited desirable low optical attenuation(0.18 ± 0.01 dB cm-1 with 650 nm laser light),excellent biocompatibility and tissue-like Young's modulus(＜ 2.60 MPa).The optical waveguide hydrogel fibers were successfully employed for deep-tissue cancer therapy and brain optogenetic stimulation,confirming that they could serve as an efficient versatile tool for diverse deep-tissue therapy and brain optogenetic applications.

关键词： optical waveguide hydrogel fiber deep-tissue photothermal therapy optogenetic stimulation

来源：评论

学校读者我要写书评

暂无评论

Specific Regulation of m^(6)A by SRSF7 Promotes the Progression of Glioblastoma

引用

Genomics, Proteomics & Bioinformatics 2023年第4期21卷 707-728页

作者： Yixian Cun Sanqi An Haiqing Zheng Jing Lan Wenfang Chen Wanjun Luo Chengguo Yao Xincheng Li Xiang Huang Xiang Sun Zehong Wu Yameng Hu Ziwen Li Shuxia Zhang Geyan Wu Meisongzhu Yang Miaoling Tang Ruyuan Yu Xinyi Liao Guicheng Gao Wei Zhao Jinkai Wang Jun Li Department of Rehabilitation Medicine Key Laboratory of Liver Disease of Guangdong ProvinceThe Third Affiliated HospitalSun Yat-sen UniversityGuangzhou 510080China Department of Biochemistry Zhongshan School of MedicineSun Yat-sen UniversityGuangzhou 510080China Department of Medical Informatics Zhongshan School of MedicineSun Yat-sen UniversityGuangzhou 510080China Center for Stem Cell Biology and Tissue Engineering Key Laboratory for Stem Cells and Tissue EngineeringMinistry of EducationSun Yat-sen UniversityGuangzhou 510080China Biosafety Level-3 Laboratory Life Sciences InstituteGuangxi Medical UniversityNanning 530020China Department of Obstetrics and Gynecology The First Affiliated HospitalSun Yat-sen UniversityGuangzhou 510080China State Key Laboratory of Oncology in South China Cancer CenterSun Yat-sen UniversityGuangzhou 510080China RNA Biomedical Institute Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhou 510080China

Serine/arginine-rich splicing factor 7(SRSF7),a known splicing factor,has been revealed to play oncogenic roles in multiple ***,the mechanisms underlying its oncogenic roles have not been well ***,based on N6-methyladenosine(m^(6)A)co-methylation network analysis across diverse cell lines,we find that the gene expression of SRSF7 is positively correlated with glioblastoma(GBM)cell-specific m^(6)A *** then indicate that SRSF7 is a novel m^(6)A regulator,which specifically facilitates the m^(6)A methylation near its binding sites on the mRNAs involved in cell proliferation and migration,through recruiting the methyltransferase ***,SRSF7 promotes the proliferation and migration of GBM cells largely dependent on the presence of the m^(6)A *** two m^(6)A sites on the mRNA for PDZ-binding kinase(PBK)are regulated by SRSF7 and partially mediate the effects of SRSF7 in GBM cells through recognition by insulin-like growth factor 2 mRNA-binding protein 2(IGF2BP2).Together,our discovery reveals a novel role of SRSF7 in regulating m^(6)A and validates the presence and functional importance of temporal-and spatial-specific regulation of m^(6)A mediated by RNA-binding proteins(RBPs).

关键词： m^(6)A Serine/arginine-rich splicing factor 7 Cell-specific regulation Glioblastoma PDZ-binding kinase

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：