检索结果-南通市图书馆

Energy and AI 2024年第1期15卷 300-311页

作者： Sipei wua Haiou Wang Kai Hong Luo Center for Combustion Energy Key Laboratory for Thermal Science and Power Engineering of Ministry of EducationDepartment of Energy and Power EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China Department of Mechanical Engineering University College LondonTorrington PlaceLondon WC1E 7JEUnited Kingdom

This paper systematically develops a high-fidelity turbulent combustion surrogate model using deep *** construct a surrogate model to simulate the turbulent combustion process in real time,based on a state-ofthe-art spatiotemporal forecasting neural *** address the issue of shifted distribution in autoregressive long-term prediction,two training techniques are proposed:unrolled training and injecting noise *** techniques significantly improve the stability and robustness of the *** datasets of turbulent combustion in a combustor with cavity and a vitiated co-flow burner(Cabra burner)have been generated for model *** effects of model architecture,unrolled time,noise amplitude,and training dataset size on the long-term predictive performance are *** well-trained model can be applicable to new cases by extrapolation and give spatially and temporally consistent results in long-term predictions for turbulent reacting flows that are highly unsteady.

关键词： Turbulent combustion Detailed reaction mechanism Transient simulation Deep neural network Spatiotemporal series prediction Long-term forecast stability

Corrigendum to“Toward stable and highly reversible zinc anodes for aqueous batteries via electrolyte engineering”[*** Chem.83(2023)209–228]

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

Journal of Energy Chemistry 2024年第4期91卷 323-323页

作者： Ang Li Jiayi Li Yurong He Maochun wua Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHong Kong 999077China School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina

It is regretful that the Acknowledgments part was lost in the final process of *** Acknowledgments part should be added as *** work described in this paper was supported by the grants from the Research Grants Council ... 详细信息

关键词： electrolyte ledgment Administrative

Direct reduction of hematite powders in a fluidized bed reactor

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

Particuology 2013年第3期11卷 294-300页

作者： Qingshan Zhu Rongfang wua Hongzhong Li State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of Sciences Graduate University of Chinese Academy of Sciences

Ultrafine hematite powder was reduced to produce ultrafine iron powder in a 50%Ar-50%H2 atmosphere at 450-550 ℃ in a fluidized bed reactor. The ultrafine hematite powder shows the typical agglomerating fluidization behavior with large agglomerates fluidized at the bottom of the bed and small agglomerates fluidized at the upper part of the bed. It was found that defluidization occurred even at the low temperature of 450 C with low metallization rate. Defluidization was attributed mainly to the sintering of the newly formed iron particles. Granuation was employed to improve the fluidization quality and to tackle the defluidization problem, where granules fluidized like a Geldart＇s group A powder. Granulation was found to effectively reduce defluidization during reduction, without however sacrificing reduction speed. The asreduced iron powders from both the ultrafine and the granulated hematite exhibited excellent sintering activity, that is, fast sintering at temperature of as low as ~580℃, which is much superior as compared to that of nano/ultrafine iron powders made by other processes.

关键词： Direct reduction Granulation Defluidization Sintering Ultrafine iron powder

Synthesis and Structural Characterization of a Cyano-bridged Dinuclear neodymium(III)-iron(III) Complex [nd(DMSO)_5(H_2O)_2](μ-Cn)[Fe(Cn)_5]

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2004年第11期23卷 1282-1286页

作者： CHEnWen-Tong CAILi-Zhen wua-Qing GUOGuo-Cong HUAnGJin-Shun StateKeyLaboratoryofStructuralChemistry FujianInstituteofResearchontheStructureofMatterTheChineseAcademyofSciencesFuzhouFujian350002China

A new neodymiumIII-ironIII complex [nd(DMSO)5(H2O)2](μ-Cn)[Fe(Cn)5] (DMSO = dimethyl sulfoxide) has been synthesized by the grinding reaction method. The crystal belongs to monoclinic, space group P21/m with a = 8.859(4), b = 13.684(5), c = 12.290(4) ?, ?= 91.85(2)o, C16H34Fen6ndO7S5, Mr= 782.88, V = 1489(1) ?3, Z = 2, Dc = 1.746 g/cm3, S = 0.906, μ(MoKa) = 2.606 mm-1, F(000) = 788, R = 0.0646 and wR = 0.1654. The slightly distorted square-antiprism eightfold-coordinated nd(III) and approximately oriented octahedrally sixfold- coordinated Fe(III) are linked by a cyano-bridge group to construct a dinuclear compound. The [nd(DMSO)5(H2O)2](μ-Cn)[Fe(Cn)5] species are held together via hydrogen bonds to form a three-dimensional framework.

关键词： crystal structure cyano-bridged dinuclear complex neodymium complex iron complex

Atomic level engineering of noble metal nanocrystals for energy conversion catalysis

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第12期30卷 604-624,I0014页

作者： Yancai Yao Shiqi Wang Zhijun Li Yuen wua School of Chemistry and Materials Science iChEM(Collaborative Innovation Center of Chemistry for Energy Materials)Hefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026AnhuiChina School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Joint International Research Laboratory of Advanced Chemical Catalytic Materials&Surface Science College of Chemistry and Chemical EngineeringNortheast Petroleum UniversityDaqing 163318HeilongjiangChina

It is commonly known that the performance of electrocatalysts is largely influenced by the size,morphology,composition,and crystalline phase of noble metal ***,the limited reserves and high cost of noble metals largely restrict their industrial *** with the development of characterization techniques,theoretical calculations,and advanced material synthesis methods,modulating the electrocatalytic properties of noble metal nanocrystals at the atomic scale(e.g.,monolayer/sub-monolayer,single-atom alloy,ultrafine structure)has been flooding *** noble metal nanocrystals at the atomic level could not only immensely improve the noble metal atom utilization efficiency and lower the cost,but also boost the catalytic *** this review,we summarize the recent advanced progresses of regulating the noble metal nanocrystals at the atomic scale towards energy conversion ***,the challenges and perspectives of designing noble metal nanocrystals at the atomic scale in the future are discussed and *** is expected that this review will inspire scientists to further study precious metal-based materials for energy-oriented catalysis.

关键词： noble metal Atomic regulation Synthetic strategy Electrocatalysis

Assembling of a novel 3D Ag(Ⅰ)-MOFs with mixed ligands tactics：Syntheses, crystal structure and catalytic degradation of nitrophenol

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2018年第6期29卷 845-848页

作者： Dandan Huang Xueqian wua Junwu Tian Xiaokun Wang Zhihang Zhou Dongsheng Li College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials Hubei Provincial Collaborative Innovation Center for New Energy Microgrid China Three Gorges University Yichang 443002 China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 China

A silver-based metal-organic framework（Ag-MOFs）, [Ag2（H3 ddcba）（dpp）2]（1）（H5 ddcba = 3,5-（di（2’,5’-dicarboxylphenyl）benozoic acid, dpp = 1,3-di（4-pyridyl）propane）, was successfully constructed via hydrothermal assembly of a pentacaboxylate ligand, a n-donor ligand and Ag（I） ions, which possesses a pcu topology and exhibits excellent catalytic properties in aqueous solution for the degradation of onitrophenol（2-nP）, m-nitrophenol（3-nP） and p-nitrophenol（4-nP）. Related kinetics of such catalytic reactions, photoluminescent and thermal stability of compound 1 were also investigated.

关键词： Ag(Ⅰ) metal organic framework Mixed ligands tactics Crystal structure nitrophenol Catalytic properties

Self-twisting for macrochirality from an achiral asterisk molecule with fluorescence-phosphorescence dual emission

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2017年第11期28卷 2151-2154页

作者： Hongwei wua Bin Wu Xiyuan Yu Pei Zhao Wenbo Chen Liangliang Zhu State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai Key Lab of Polymer and Electrical Insulation School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power Shanghai University of Electric Power

Understanding of the role of supramolecular chirality for tuning material optoelectronic properties has been restricted by the limited number of cases. A particular challenge is to impose supramolecular chirality onto multicolor luminescent systems that can emit in aggregation state. Here we present a self- assembly strategy from a well-selected asterisk molecule for generating supramolecular chirality with fluorescence-phosphorescence dual emission. The work takes advantages of （1） achiral chemical structure dependent peculiar self-assembly that can spontaneously undergo symmetry breaking to produce macrochirality, and （2） the assembly process can be monitored by time which due to the crystallization-driven self-assembly by self-twisting, allowing a self-progressing chiral amplification. A multicolor luminescence induced by the fluorescence-phosphorescence dual emission along with such a self-assembly behavior was also observed at a single solution system versus the time. The self-twisting chiral self-assembly fashion provides new prospects for understanding the establishment of nanochirality from achiral molecular building blocks.

关键词： Achiral molecules self-twisting Macrochirality Fluorescence-phosphorescence Dual emission

Quantitative study of dimensional stability mechanism and microstructure evolution during precipitation process of 2024Al alloy

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2021年第31期90卷 85-94页

作者： Youfang Cao Longtao Jiang Deng Gong Guoqin Chen Ziyang Xiu Yangming Cheng Xiufang Wang Gaohui wua School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China State Key Laboratory of Advanced Welding Production Technology Harbin Institute of TechnologyHarbin 150001China Shanghai Institute of Microsystem and Information Technology Chinese Academy of SciencesShanghai 200050China

In this paper,we were devoted to quantitatively analyzing the dimensional change of 2024 Al alloy during the aging *** of precipitates have been defined and the corresponding volume fraction has been measured with Transmission Electron Microscopy(TEM)and Three-Dimensional Atom Probe Tomography(3 D-APT).Guinier-Preston-Bagaryatsky(GPB)zone(0.86 vol.%)was found after aging for 8 *** zone(0.17 vol.%)and S'phase(1.02 vol.%)was found after aging for 24 *** reduced dimensional change was attributed to the reduction of matrix lattice *** to the initial supersaturated solid solution state,the lattice strain of-2.79×10^(-5)and-5.16×10^(-5)was produced after 8 h and 24 h aging *** difference of the lattice parameters between the precipitates and matrix was also considered.A model was established to quantitatively describe the relationship between the precipitation process and dimensional change of 2024 Al alloy.

关键词： Aluminum alloy Aging Atom probe tomography(APT) Dimensional stability Precipitate

Research on DC Protection Strategy in Multi-Terminal Hybrid HVDC System

在线全文

学校读者我要写书评

暂无评论

Engineering 2021年第8期7卷 1064-1075页

作者： Yuping Zheng Jiawei He Bin Li Tonghua wua Wei Dai Ye Li State Key Laboratory of Smart Grid Protection and Control State Grid Electric Power Research Institute(NARI Group Corporation)Nanjing 211106China Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjin 300072China College of Energy and Electrical Engineering Hohai UniversityNanjing 210098China

Multi-terminal hybrid high-voltage direct current(HVDC)systems have been developed quickly in recent years in power transmission ***,for voltage-source converter(VSC)stations in hybrid HVDC systems,no direct current(DC)filters are *** addition,the DC reactor is also not installed at the line end because the DC fault can be limited by the converter *** means that the boundary element at the line end is absent,and the single-ended protections used in line commutated converter(LCC)based HVDC(LCC-HVDC)systems or VSC-HVDC systems cannot distinguish the fault line in multi-terminal hybrid HVDC *** paper proposes a novel singleended DC protection strategy suitable for the multi-terminal hybrid HVDC system,which mainly applies the transient information and active injection concept to detect and distinguish the fault *** with the single-ended protections used in LCC-HVDC and VSC-HVDC systems,the proposed protection strategy is not dependent on the line boundary element and is thus suitable for the multiterminal hybrid HVDC *** corresponding simulation cases based on power systems computer aided design(PSCAD)/electromagnetic transients including DC(EMTDC)are carried out to verify the superiority of the proposed protection.

关键词： Multi-terminal hybrid HVDC system Single-ended protection Transient information Active injection

Dipole and charge effects of chloroaluminum phthalocyanine revealed by local work function measurements at sub-molecular level

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

Chinese Chemical Letters 2018年第3期29卷 429-432页

作者： Huanjun Song na Li Hao Zhu Zhantao Peng Wenhui Zhao Haoran Chen Wei Chen Yongfeng Wang Kai wua BnLMS College of Chemistry and Molecular Engineering Peking University Beijing 100871 China Key Laboratory for the Physics and Chemistry of nanodevices Department of Electronics Peking University Beijing 100871 China Department of Chemistry National University of Singapore Singapore 117543 Singapore

Work function plays a significant role in surface chemistry. Local work function provides the information of local d/pole-d/pole interaction and charge distribution between adsorbates and substrate, highlighting the local charge effect of the targeted spot which is normally smeared out in conventional average work function measurements. Chloroaluminum phthalocyanine （CIA1Pc）, an important optoelectronic molecule with a permanent dipole moment pointing from the Pc ring to the ending CI atom, adsorbed on Au（111） in either Cl-up or Cl-down configuration. Scanning tunneling microscopy/spectroscopy measurements revealed that at the centers of Cl-up and CI-down molecules, the local work functions changed oppositely with respect to the Au（111） substrate. At their Pc lobes, however, the local work functions unanimously increased due to charging effect of the indole lobes in the CIAIPc molecule.

关键词： Chloroaluminum phthalocyanine Local work function Dipole orientation Scanning tunneling microscopy Surface dipole