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A Polyanionic,Quasi-zero-strain and Open-framework K_(0.76)V_(0.55)Nb_(0.45)OPO_(4) for Sodium-ion Batteries

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Chinese Journal of Structural Chemistry 2021年第12期40卷 1631-1638,1553页

作者： LIU Jian-Dong-Yong YU Xu bao jing-ze LIN Ying-Xi C45 Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of Chemistry Fuzhou UniversityFuzhou 350108China

A carbon-coated K_(0.76)V_(0.55)Nb_(0.45)OPO_(4)(KVNP@C)polyanion material was successfully synthesized by a simple sol-gel *** KVNP@C possesses a highly stable inorganic open-framework structure,which is hard to be affected by the Na^(+) intercalation/deintercalation when used as an anode material for sodium-ion batteries(NIBs).The assembled KVNP@C/Na half-cell shows a capacity retention of 81.2%and an average Coulombic efficiency of 99.8%at a current density of 300 mA/g after 1500 ***-situ XRD analysis reveals a single-phase solid solution reaction mechanism with a lattice expansion of 4.76%.This work sheds insights into the quest for developing novel polyanion-based anode materials for sodium-ion batteries.

关键词： anode material sodium-ion batteries high structural stability solid solution reaction

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煤田地质勘查常见事故原因分析

能源与节能 2013年第10期 33-34页

作者：荆保沢孙志伟吴明韩丁伟吉林省煤炭地质调查总院吉林长春130000 吉林省煤田地质勘查设计研究院吉林长春130000

就"安全生产活动月"生产检查中发现的问题结合以往工作经验,进行了煤田地质勘查常见事故原因分析,叙述了标准化建设的体会,提出了标准化建设的建议。

关键词：煤田地质勘查事故原因标准化建设

Effects of edge cracks on the thermomagnetic instabilities of type-Ⅱ superconducting thin films

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National Science Review 2023年第3期10卷 17-28页

作者： ze jing Institute of Extreme Mechanics and School of Aeronautics Northwestern Polytechnical University

Thermomagnetic instability is a crucial issue for the application of *** of edge cracks on the thermomagnetic instability of superconducting thin films are systematically investigated in this *** flux avalanches in thin films are well reproduced through electrodynamics simulations,and relevant physical mechanisms are revealed from dissipative vortex dynamics *** is found that edge cracks sharply decrease the threshold field for the thermomagnetic instability of superconducting *** analysis shows that the time series of magnetization jumping displays scale-invariance and follows a power law with an exponent around *** a cracked film,flux jumps more frequently with lower amplitudes compared with its crack-less *** the crack extends,the threshold field decreases,the jumping frequency gets lower,while its magnitude gets *** the crack has extended long enough,the threshold field increases to even larger than that of the crack-less *** counterintuitive result originates from the transition of the thermomagnetic instability triggered at the crack tip to the one triggered at the center of the crack edges,which is validated by the multifractal spectrum of magnetization jumping *** addition,with the variation of crack lengths,three different modes of vortex motion are found,which explains the different flux patterns formed in the avalanche process.

关键词： superconducting thin film thermomagnetic instability flux jumps edge crack scaling law

Influences of Iridium and Palladium on Oxidation Resistance of PtAl Coating

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Acta Metallurgica Sinica(English Letters) 2021年第8期34卷 1120-1130页

作者： Ling-Yi Qian jing Wang Yun-Shan Guo He Liu ze-Bin bao AECC Commercial Aircraft Engine Co. LtdShanghai 201108China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

The overarching goal of present study is to investigate the effects of Ir and Pd additions on the oxidation behaviour of PtAl coatings. Prior to depositing standard PtAl coating, Ir layer was electroplated by IrBr 3 aqueous solution while Pd layer was prepared using electroless deposition. Comparing with normal PtAl coating, cyclic oxidation tests were carried out on both the Ir-and Pd-modified aluminide coatings. The results showed that Ir-modified PtAl coating exhibited better oxidation resistance than both Pd-modified and normal PtAl coatings because Ir partly served as diffusion barrier to reserve Al while Pd did not.

关键词： Thermal barrier coating PtAl coating Oxidation resistance Iridium Palladium

Comprehensive two-dimensional river ice model based on boundary-fitted coordinate transformation method

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Water Science and Engineering 2014年第1期7卷 90-105页

作者： ze-yu MAO jing YUAN Jun bao Xiao-fan PENG Guo-qiang TANG Department of Hydraulic Engineering Tsinghua University

River ice is a natural phenomenon in cold regions, influenced by meteorology, geomorphology, and hydraulic conditions. River ice processes involve complex interactions between hydrodynamic, mechanical, and thermal processes, and they are also influenced by weather and hydrologic conditions. Because natural rivers are serpentine, with bends, narrows, and straight reaches, the commonly-used one-dimensional river ice models and two-dimensional models based on the rectangular Cartesian coordinates are incapable of simulating the physical phenomena accurately. In order to accurately simulate the complicated river geometry and overcome the difficulties of numerical simulation resulting from both complex boundaries and differences between length and width scales, a two-dimensional river ice numerical model based on a boundary-fitted coordinate transformation method was developed. The presented model considers the influence of the frazil ice accumulation under ice cover and the shape of the leading edge of ice cover during the freezing process. The model is capable of determining the velocity field, the distribution of water temperature, the concentration distribution of frazil ice, the transport of floating ice, the progression, stability, and thawing of ice cover, and the transport, accumulation, and erosion of ice under ice cover. A MacCormack scheme was used to solve the equations numerically. The model was validated with field observations from the Hequ Reach of the Yellow River. Comparison of simulation results with field data indicates that the model is capable of simulating the river ice process with high accuracy.

关键词： two-dimensional river ice numerical model boundary-fitted coordinate technology river ice process freeze-up MacCormack scheme natural river

Mesh-supported V2O5-WO3/TiO2 nanosheet array catalysts for efficient removal of NOx

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Tungsten 2025年第1期 100-111页

作者： Zhi-Qi Zhang Liu Yang Wen Luo Vladimir An jing Li bao-Dan Liu School of Materials Science and Engineering Northeastern University Foshan Graduate School of Innovation Northeastern University Kizhner Research Center School of Advanced Manufacturing Technologies Tomsk Polytechnic University

The design and synthesis of vanadium-based denitration catalysts with low-temperature activity pose significant challenges in the field of toxic gas *** this study,we have developed a novel approach to fabricate highly efficient V2O5-WO3/TiO2monolithic mesh catalysts for NOxreduction at low ***,TiO2nanosheets with strong adhesion and large surface area were grown on Ti mesh using plasma electrolytic oxidation technology and hydrothermal ***,super-small traces of WO3and V2O5active nano-species were subsequently deposited on TiO2nanosheets using the deposition-precipitation *** to traditional ceramic-based V2O5-WO3/TiO2catalysts,our V2O5-WO3/TiO2monolithic mesh catalyst exhibits superior mechanical performance,excellent thermal conductivity,lower pressure drop,higher utilization of active components,and stronger synergistic ***,the V2O5-WO3/TiO2monolithic mesh catalysts exhibited excellent low-temperature catalytic activity with 98% of NOxconversion at 220℃,and remarkable long-term SO2tolerance and water resistance in the selective catalytic reduction（SCR） of NOxwith *** SCR reaction of tiny V2O5and WO3active species supported on TiO2nanosheets directly demonstrated to follow the Eley-Rideal mechanism by in situ infrared spectra.

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Sensitivity impacts owing to the variations in the type of zero-range pairing forces on the fission properties using the density functional theory

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Nuclear Science and Techniques 2024年第3期35卷 198-207页

作者： Yang Su ze-Yu Li Li-Le Liu Guo-Xiang Dong Xiao-bao Wang Yong-jing Chen China Nuclear Data Center China Institute of Atomic EnergyBeijing 102413China School of Science Huzhou UniversityHuzhou 313000China

Using the Skyrme density functional theory,potential energy surfaces of^(240)Pu with constraints on the axial quadrupole and octupole deformations(q_(20)and q_(30))were *** volume-like and surface-like pairing forces,as well as a combination of these two forces,were used for the Hartree–Fock–Bogoliubov *** in the least-energy fission path,fission barrier,pairing energy,total kinetic energy,scission line,and mass distribution of the fission fragments based on the different forms of the pairing forces were analyzed and *** fission dynamics were studied based on the timedependent generator coordinate method plus the Gaussian overlap *** results demonstrated a sensitivity of the mass and charge distributions of the fission fragments on the form of the pairing *** on the investigation of the neutron-induced fission of^(239)Pu,among the volume,mixed,and surface pairing forces,the mixed pairing force presented a good reproduction of the experimental data.

关键词： Nuclear fission Density functional theory Pairing force Potential energy surfaces Fission fragment distribution

Strong coupling between height of gaps and thickness of thermal boundary layer in partitioned convection system

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Chinese Physics B 2019年第9期28卷 270-275页

作者： ze-Peng Lin Yun bao Department of Mechanics Sun Yat-Sen University

A direct numerical simulation(DNS) method is used to calculate the partitioned convection system with Ra number ranging from 10^7 to 2×10^*** the boundary layer thickness to normalize the height of gaps d, we find a strong consistency between the variation of the TD number(the average value of the temperature in each heat transfer channel is averaged after taking the absolute values) with the change of the height of gaps and the variation of the TD number with the change of Ra number in partitioned *** a given thickness of partition, heights of gaps are approximately equal to 0.5 or 1 time of the thermal boundary layer thickness λθ at different Ra *** number representing temperature characteristics is almost the constant value, which means that TD number is a function of d/λθ *** of local temperature field of area in gaps shows that the temperature distribution in the gaps are basically the same when d/λθ is *** heat transfer Nu number of the system at d/λθ≈ 0.5 is larger than that of d/λθ≈ 1, both of them have the same scaling law with Ra number and Nu^Ra^0.25.

关键词： partitioned convection system height of gaps thermal boundary layer TD number

Dimensionally confined nanosheets self-assembled through self-shielding multiple hydrogen bonding interactions in aqueous media

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Chinese Chemical Letters 2022年第11期33卷 4856-4859页

作者： jing Zhang Shuaiwei Qi Hao Yu ze Lin bao Li Ming Wang zeyuan Dong State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China

Herein,we adopt a simple supramolecular strategy to effectively control the tautomerism of ureidopyrimidinone(UPy)moiety and ultimately realize the complete arrangement of enol *** obtained UPy derivatives containing self-complementary quadruple hydrogen bonding interactions can spontaneously self-assemble towards the formation of well-controlled,self-organized supramolecular nanostructure morphologies in both chloroform and *** resulting aggregates had been fully characterized by various spectroscopy(absorption,emission)and microscopy(TEM,SEM and AFM)*** is anticipated that this study can provide an exact and excellent monomeric unit for controllable and precise supramolecular *** results achieved here also demonstrate the utility and feasibility of multiple hydrogen bonds to direct the self-assembly of small-molecule building blocks in aqueous media,which provides a strategy for the construction of well-defined and stable supramolecular architectures with chemical functionalities and physical properties as advanced materials for biological applications.

关键词： Hydrogen bonding Aqueous media Sandwich structure Self-shielding Two-dimension