检索结果-南通市图书馆

维普期刊数据库

Perceived value of microfinance and SME per.ormance: The role of exploratory innovation

在线全文

学校读者我要写书评

暂无评论

International Journal of Innovation Studies 2024年第2期8卷 172-185页

作者： Christian Sar.o Jing A.zhang Conor.o'Kane Paula o'Kane Department of Management University of LincolnBrayford PoolLincoln LN67TSUnited Kingdom Department of Management Otago Business SchoolUniversity of OtagoPO Box 56Dunedin9054New Zealand

This study examines how perceived value of microfinance and exploratory innovation affect small and medium-sized enterprises(SME)per.ormance in the context of a developing *** on the strategic innovation and microfinance literature,we hypothesize that(1)perceived value of microfinance affects exploratory innovation and SME per.ormance,and(2)exploratory innovation serves as an effective mechanism through which microfinance enhances SME *** employ partial least squares structural equation modeling(PLS-SEM)to test our *** a sample of 581 Ghanaian SMEs with microfinance,the results of the PLS SEM support our *** further conducted a qualitative analysis of comments provided by the SMEs(n=144)to gain a deeper understanding of exploratory innovation in developing *** findings show that SMEs pur.osefully attempt to strengthen their exploratory inno-vation in *** discuss the theoretical and practical implications of these findings as well as future research avenues.

关键词： Perceived value of microfinance Exploratory innovation SME per.ormance

Plant gene co-expression defines the biosynthetic pathway of neuroactive alkaloids

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2024年第3期17卷 372-374页

作者： Fang Liu' Alisdair r.Fernie Youjun zhang Key Laboratory of Seed Innovation Institute of Genetics and Developmental BiologyChinese Academy of Sciences100101 BeijingChina Max Planck Institute of Molecular Plant Physiology Am Muhlenberg 114476 Potsdam-GolmGermany Center for Plant Systems Biology and Biotechnology 4000 PlovdivBulgaria University of Chinese Academy of Sciences 100049 BeijingChina

Transcriptomes comprise gene co-expression cluster.or modules,showcasing distinct patterns of coordinated expression among groups of genes across independent biological samples(Serin et al.,2016).The"guilt-by-association"hypothesis suggests the functional importance of these clusters;for example,co-expressed genes associated with metabolism typically contain genes encoding several enzymes associated with the same pathways.

关键词： metabolism alkaloids

DEM analysis of the influence of stirrer design on die filling with forced powder feeding

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2024年第5期88卷 107-115页

作者： Chao Zheng Edward Yost Ariel r.Muliadi Nicolin Govender Ling zhang Chuan-Yu Wu School of Chemistry and Chemical Engineering University of SurreyGuildfordGU2 7XHUnited Kingdom Small Molecule Pharmaceutics GenentechInc.One DNA WaySouth San FranciscoCA94080USA

Die filling is a critical stage during powder compaction,which can significantly affect the product quality and *** this paper,a forced feeder is introduced attempting to improve the filling per.ormance of a lab-scale die filling *** die filling process is analysed with a graphics processing units(GPU)enhanced discrete element method(DEM).Var.ous stirrer designs are assessed for a wide range of process settings(i.e.,stirrer speed,filling speed)to explore their influence on the die filling per.ormance of free-flowing *** results show that die filing with the novel helical-ribbon(i.e.,type D)stirrer design exhibits the highest filling ratio,implying that it is the most robust stirrer design for the feeder configuration ***,die filling per.ormance with the type D stirrer design is a function of the stirrer speed and the filling speed.A positive variation of filling ratio(ηf>0%)can be ensured over the whole range of filling speed by adjusting the stirrer speed(i.e.,increasing the stirrer speed).The approach used in this study can not only help understand how the stirrer design affects the die filling per.ormance but also guide the optimization of feeder system and process settings.

关键词： Discrete element method Die filling Forced feeding Stirrer design GPU computing

Plasmon-enhanced photocatalytic oxidative coupling of amines in the air using a delicate Ag nanowire@NH_(2)-Uio-66 core-shell nanostructures

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 2024年第4期35卷 506-510页

作者： Yuan zhang Shenghao Gong A.r.Mahammed Shaheer rong Cao Tianfu Liu Fujian Science Technology Innovation Laboratory for.optoelectronic Information of China Fuzhou 350108China College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

MoF-based core-shell structures with high surface area, abundant active sites, and broad absorption bands are viable alternatives to traditional single-component photocatalysts. In this report, we describe the design and construction of delicate Ag nanowires@NH_(2)-Uio-66 with a core-shell structure for use as photocatalysts in imine synthesis under light. The optimized composites exhibited 80% imine production, which was higher than both MoF and Ag NWs. The significant improvement in photocatalytic activity under light may be attributed to the plasmonic effect of silver nanowires and their core-shell structure, which promotes the separation of electron-hole pairs. Mor.over, the photocatalytic activity of the core-shell nanostructure may provide valuable insight into the design and construction of MoF-based composite photocatalysts for.oxidative coupling of amines.

关键词： Metal-organic frameworks Plasmonic silver nanowires Photocatalyst Core-shell nanostructure oxidative coupling of amines

维普期刊数据库

Diatomic Pd catalyst with conjugated backbone for synergistic electrochemical Co_(2)reduction

在线全文

学校读者我要写书评

暂无评论

Nano research 2024年第6期17卷 4850-4855页

作者： Wenxuan zhang Mengran zhang Hongjuan Wang Wen zhang Min zhang MoE International Joint Laboratory of Materials Microstructure Institute for New Energy Materials and Low Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Tianjin Key Laboratory of organic Solar Cells and Photochemical Conversion School of Chemistry and Chemical EngineeringTianjin University of TechnologyTianjin 300384China

Double-site catalysts have attracted widespread attention in the field of electrocatalysis due to their high metal loading,adjustable active centres,and electronic valence ***,the development of bimetallic sites catalysts that coordinate with definite atoms is still in the exploratory ***,we designed and synthesized a bimetallic palladium complex(BPB-Pd_(2))with conjugated *** supported BPB-Pd_(2)was applied to electrochemical Co_(2)reduction reaction(Co_(2)rr)for the first *** as-obtained BPB-Pd_(2)gives an exceptional Faradaic efficiency of Co(FECo)of 94.4%at−0.80 V *** hydrogen electrode(rHE),which is significantly super.or to monoatomic palladium catalyst(BPB-Pd1).The density functional theory(DFT)calculations revealed that the essential reason for the outstanding activity of BPB-Pd_(2)toward Co_(2)rr was that the electronic effect between diatomic palladium reduces the free energy change for Co_(2)rr ***,BPB-Pd_(2)exhibits moderate free energy change to form CooH*intermediate,which was beneficial for the generation of Co in Co_(2)rr.

关键词： synthesis electrocatalysis Co_(2)reduction bimetallic palladium complex synergistic catalysis

N-doped graphene quantum dot-decorated N-Tio2/P-doped porous hollow g-C_(3)N_(4) nanotube composite photocatalysts for antibiotic photodegradation and H2 production

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 165-178页

作者： Jingshu Yuan Yao zhang Xiaoyan zhang Junjie zhang Shen’gen zhang Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China Xi’an Fanyi University Xi’an 710105China Shunde Graduate School of University of Science and Technology Beijing Foshan 528399China State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyMacao SAR 820000China

Exclusive responsiveness to ultraviolet light (~3.2 eV) and high photogenerated charge recombination rate are the two primary drawbacks of pure Tio_(2). We combined N-doped graphene quantum dots (N-GQDs), morphology regulation, and heterojunction construction strategies to synthesize N-GQD/N-doped Tio_(2)/P-doped porous hollow g-C_(3)N_(4) nanotube (PCN) composite photocatalysts (denoted as G-TPCN). The optimal sample (G-TPCN doped with 0.1wt% N-GQD, denoted as 0.1% G-TPCN) exhibits significantly enhanced photoabsorption, which is attributed to the change in bandgap caused by elemental doping (P and N), the improved light-harvesting resulting from the tube structure, and the upconversion effect of N-GQDs. In addition, the internal charge separation and transfer capability of0.1% G-TPCN are dramatically boosted, and its carrier concentration is 3.7, 2.3, and 1.9 times that of N-Tio_(2), PCN, and N-Tio_(2)/PCN(TPCN-1), respectively. This phenomenon is attributed to the formation of Z-scheme heterojunction between N-Tio_(2) and PCNs, the excellent electron conduction ability of N-GQDs, and the short transfer distance caused by the porous nanotube structure. Compared with those of N-Tio_(2), PCNs, and TPCN-1, the H2 production activity of 0.1%G-TPCN under visible light is enhanced by 12.4, 2.3, and 1.4times, respectively, and its ciprofloxacin (CIP) degradation rate is increased by 7.9, 5.7, and 2.9 times, respectively. The optimized per.ormance benefits from excellent photoresponsiveness and improved carrier separation and migration efficiencies. Finally, the photocatalytic mechanism of 0.1% G-TPCN and five possible degradation pathways of CIP are proposed. This study clarifies the mechanism of multiple modification strategies to synergistically improve the photocatalytic per.ormance of 0.1% G-TPCN and provides a potential strategy for rationally designing novel photocatalysts for environmental remediation and solar energy conversion.

关键词： N-doped Tio_(2) N-doped graphene quantum dots P-doped g-C_(3)N_(4) porous hollow nanotube heterojunction photocatalysis

维普期刊数据库

reversing free-electron transfer.of sulfide cocatalyst for exceptional photocatalytic H_(2)evolution

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2024年第4期171卷 147-149页

作者： Yanfeng zhang Zhenyi zhang National Experimental Chemistry Teaching Center Hebei Key Laboratory of Inorganic Nano-materialsCollege of Chemistry and Materials ScienceHebei Normal UniversityShijiazhuang 050024China Key Laboratory of New Energy and rare Earth resource Utilization of State Ethnic Affairs Commission Key Laboratory of Photosensitive Materials and Devices of Liaoning ProvinceSchool of Physics and Materials EngineeringDalian Minzu UniversityDalian 116600China

recently,Yu and co-workers deeply explore the potential impact of free electron transfer between co-catalysts and photocatalyst carriers on H_(2)evolution efficiency of active sites over MoS_(2+x).They pro-pose an electron-reversal tactics to evade the unexpected electron transfer and synchronously regulate the above transfer in a beneficial orientation for weakening hydrogen adsorption on S ***,this highlight not only discusses and summarizes the essences of electron reversal and the optimized H ad-sorption/desorption mechanism,but also emphasizes the significance of femtosecond transient absorp-tion spectroscopy(fs-TAS)and in-situ irradiated X-ray photoelectron spectroscopy(ISI-XPS)for revealing charge transfer dynamics and *** anticipate that this highlight can disseminate a new per-spective on the roles of photocatalyst carriers in improving cocatalytic H_(2)-production kinetics.

关键词： Photocatalysis Cocatalyst Electron reversal Antibonding-orbital occupancy S–H bonds

Quantum state tomography from observable time traces in closed quantum systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Control Theory and Technology 2024年第2期22卷 222-234页

作者： Shuixin Xiao Yuanlong Wang Qi Yu Jun zhang Daoyi Dong Ian r.Petersen University of Michigan–Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong UniversityShanghai200240China School of Engineering The Australian National UniversityCanberraACT2601Australia Key Laboratory of Systems and Control Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing100190China Centre for Quantum Computation and Communication Technology(Australian research Council) Centre for Quantum DynamicsGriffith UniversityBrisbaneQLD4111Australia School of Engineering and Technology University of New South WalesCanberraACT2600Australia

The task to estimate all the parameters of an unknown quantum state, also called quantum state tomography, is essential for characterizing and controlling quantum systems. In this paper, we utilize observable time traces to identify the initial quantum state of a closed quantum system, based on the state space approach in the control theory. In the informationally complete scenar.o, we show that with a linear regression estimation (LrE), the mean squared er.or (MSE) scales as , where N is the resource number. In the informationally incomplete scenar.o, we introduce regularization LrE to per.orm the state tomography task. We employ PBH test to demonstrate that closed quantum systems with only one observable are informationally incomplete and propose using observables, where d is the dimension of the quantum state, for informational completeness. Numerical examples demonstrate the effectiveness of our method.

关键词： Quantum state tomography Time trace Quantum system identification

Numerical evaluations on the fluid production in the in-situ conversion of continental shale oil reser.oirs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Petroleum Science 2024年第04期21卷 2485-2501页

作者： Zhao-Bin zhang Maryelin Josefina Brice?o Montilla Shou-Ding Li Xiao Li Jian-Peng Xing Yan-Zhi Hu Key Laboratory of Shale Gas and Geoengineering Institute of Geology and Geophysics Chinese Academy of Sciences Institute of Earth Sciences Chinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences Institute of Energy Peking University

In-situ conversion presents a promising technique for exploiting continental oil shale formations,characterized by highly fractured organic-rich rock. A 3D in-situ conversion model, which incor.orates a discrete fracture network, is developed using a self-developed thermal-flow-chemical(TFC) *** of the model elucidates the in-situ conversion process in three stages and defines the transformation of fluids into three distinct outcomes according to their end stages. The findings indicate that kerogen decomposition increases fluid pressure, activating fractures and subsequently enhancing permeability. A comprehensive analysis of activated fracture permeability and heating power reveals four distinct production modes, highlighting that increasing heating power correlates with higher cumulative fluid production. Activated fractures, with heightened permeability, facilitate the mobility of heavy oil toward production wells but hinder its cracking, thereby limiting light hydrocar.on ***, energy efficiency research demonstrates the feasibility of the in-situ conversion in terms of energy utilization, especially when considering the surplus energy from high-fluctuation energy sources such as wind and solar power to provide heating.

关键词： In-situ conversion Continental shale oil Natural fracture network TFC model