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Journal of Harbin Institute of Technology(New Series) 2013年第6期20卷 21-28页

作者： Shu-Yuan Zhao Jian-Jun Li Xiao-dong he Science and Technology on Advanced Composites in Special Environments Laboratory Harbin Institute of Technology

To explore new light-weight integrated thermal protection system panel configuration and gain good insight into the responses mechanism,heat transfer and structural field analysis for one single-layer and four double-layer corrugated core panels were performed. The obtained the temperature,buckling,stress and deflection responses were compared,and the deflection and stress distributions as well as thermal buckling mode at the time were discussed for the considered configurations when the temperature difference between the top and bottom face sheet was maximum. The results demonstrated that the non-orthogonal and hat-stiffened double-layer structures provide superior performance to resist thermal buckling deformation in comparison with other configurations. The useful information is provided for the forthcoming optimization in which thermal buckling is considered as critical design driver.

关键词： Integrated Thermal Protection System corrugated heat transfer thermal bucklingCLC number:V214.4 Document code:AArticle ID:1005-9113(2013)06-0021-08

Microporous Organic Nanotube Networks from Hyper Cross-linking Core-shell Bottlebrush Copolymers for Selective Adsorption Study

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Chinese Journal of Polymer Science 2018年第1期36卷 98-105页

作者： Tian-Qi Wang Yang Xu Zi-dong he Ming-Hong Zhou Kun Huang School of Chemistry and Molecular Engineering East China Normal University

We report a synthesis of microporous organic nanotube networks（MONNs） by a combination of hyper cross-linking and molecular templating of core-shell bottlebrush copolymers. The intrabrush and interbrush cross-linking of polystyrene（PS） shell layer in the core-shell bottlebrush copolymers led to the formation of micropores and large-sized nanopores（meso/macrospores） in MONNs, respectively, while selective removal of polylactide（PLA） core layer generated mesoporous tubular structure. The size of PLA-templated mesoporous cores and porous structure both at micro-and meso-scale could be controlled by simple tuning of the ratio of core/shell or the PLA core fraction in the bottlebrush precursors. Moreover, the resultant MONNs showed a highly selective adsorption capacity for the positively charged dyes on the basis of multi-porosity and carboxylate group-rich structure. In addition, MONNs also exhibited effective performance in size-selective adsorption of biomacromolecules. This work represents a new avenue for the preparation of MONNs and also provides a new application for molecular bottlebrushes in nanotechnology.

关键词： Microporous organic nanotube networks Hyper cross-linking Core-shell bottlebrush copolymers Meso/Macrospores Selective adsorption capacity

Finite Determinacy of High Codimension Smooth Function Germs

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Applied Mathematics(A Journal of Chinese Universities) 2019年第1期34卷 92-99页

作者： GAN Wen-liang PEI dong-he LI Qiang GAO Rui-mei School of Mathematics and Statistics Northeast Normal University School of Mathematics and Statistics Guizhou University of Finance and Economics School of Science Qiqihar University Department of Science Changchun University of Science and Technology

Mather gave the necessary and suffcient conditions for the ?nite determinacy smooth function germs with no more than codimension 4. The theorem is very effective on determining low codimension smooth function germs. In this paper, the concept of right equivalent for smooth function germs ring generated by two ideals ?nitely is de?ned. The containment relationships of function germs still satisfy ?nite k-determinacy under suffciently small disturbance which are discussed in orbit tangent spaces. Furthermore, the methods in judging the right equivalency of Arnold function family with codimension 5 are presented.

关键词： function germ Jacobian ideal diffeomorphism right equivalence

Steel Temperature Compensating Model With Multi-Factor Coupling Based on Ladle Thermal State

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Journal of Iron and Steel Research International 2012年第5期19卷 9-16页

作者： WU Peng-fei XU An-jun TIAN Nai-yuan he dong-feng State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

Combined with the parameters of the production process of a steel factory, numerical simulations for a new ladle from preheating to turnover are conducted using the finite element analysis system software （ANSYS）. The measured data proved that the simulated results are reliable. The effects of preheating time, thermal cycling times, and empty package time on steel temperature are calculated, an ideal preheating time is provided, besides, based on the analysis of a single factor and use the nonlinear analysis method, a steel temperature compensating model with di- versified coupling factors is proposed, with the largest error of the present coupling model at 1. 462 ~C, and the er- rors between actual and target steel temperature in tundish after the model is applied to practical production are basi- cally controlled within -4-6 ~C, which can meet the accuracy of the manufacturer and has a practical guiding significance for the production in steelmaking workshops.

关键词： ladle thermal state multiple-factor coupling numerical simulation compensation model

Lowering ash slagging and fouling tendency of high-alkali coal by hydrothermal pretreatment

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International Journal of Mining Science and Technology 2019年第3期29卷 521-525页

作者： Mingshun Yang Qiang Xie Xin Wang he dong Hao Zhang Chunqi Li School of Chemical and Environmental Engineering China University of Mining and TechnologyBeijing 100083China Datang International Chemical Technology Research Institute CO. Ltd.Beijing 100070China

High-alkali species in coal are notorious for causing ash slagging and fouling *** this paper,four high-alkali coals were individually subject to hydrothermal pretreatment(HTP),within a batch-type autoclave at 300 -C for 1 h,and the treated coals were analyzed,along with the oxygen-containing functional groups determined by Fourier transform infrared spectrometer(FT-IR).Then the alkali species and other components in the coal ash were quantified by X-ray fluorescence(XRF)for evaluating the ash slagging and fouling *** from this,FactSage was adopted to simulate the occurrence and transformation of alkali species during coal thermal conversion ending at various *** findings indicate that the treated coals are superior to the parent ones in terms of certain remarkable changes via *** moisture,oxygen and sulfur of the hydrothermally treated coals decline obviously,while the calorific value rises *** could reduce the alkali species to less than 2%(%,by weight,equivalent to Na2O in dry ash),with a maximum removal ratio of 88.9%,lowering the ash slagging and fouling *** proposed mechanism of HTP was that the alkali species in coal matrix became released due to the breakage of the coal functional groups and micropores during HTP.

关键词： Hydrothermal pretreatment High-alkali coal Ash slagging and fouling tendency Lowering FactSage

Recent progress about 2D metal dichalcogenides: Synthesis and application in photodetectors

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Nano Research 2021年第6期14卷 1819-1839页

作者： Yongfeng Pei Rui Chen Hang Xu dong he Changzhong Jiang Wenqing Li Xiangheng Xiao Department of Physics and Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education Hubei Nuclear Solid Physics Key LaboratoryWuhan UniversityWuhan430072China

In recent years, two-dimensional (2D) layered metal dichalcogenides (MDCs) have received enormous attention on account of their excellent optoelectronic properties. Especially, various MDCs can be constructed into vertical/lateral heterostructures with many novel optical and electrical properties, exhibiting great potential for the application in photodetectors. Therefore, the batch production of 2D MDCs and their heterostructures is crucial for the practical application. Recently, the vapour phase methods have been proved to be dependable for growing large-scale MDCs and related heterostructures with high quality. In this paper, we summarize the latest progress about the synthesis of 2D MDCs and their heterostructures by vapour phase methods. Particular focus is paid to the control of influence factors during the vapour phase growth process. Furthermore, the application of MDCs and their heterostructures in photodetectors with outstanding performance is also outlined. Finally, the challenges and prospects for the future application are presented.

关键词： metal dichalcogenides vertical/lateral heterostructures vapour phase methods photodetectors

Physical description of the monoclinic phase of zirconia based on the bond-order characteristic of the Tersoff potential

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Frontiers of physics 2021年第3期16卷 111-123页

作者： Run-Sen Zhang Ji-dong he Bing-Shen Wang Jin-Wu Jiang Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Institute of Applied Mathematics and MechanicsSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai200072China State Key Laboratory of Semiconductor Superlattice and Microstructure and Institute of Semiconductor Chinese Academy of SciencesBeijing100083China

Zirconia has many important phases with Zr coordination varying from six-fold in the orthorhombic phase to eight-fold in the cubic and tetragonal *** of empirical potentials to describe these zirconia phases is an important but long-standing challenge,and it is a bottleneck for theoretical investigation of large zirconia ***,instead of using the standard core—shell model,we developed a new potential for zirconia by combining the long-range Coulomb interaction and bond-order Tersoff *** bond-order characteristic of the Tersoff potential enables it to be well suited to describe the zirconia phases with different coordination *** particular,the complex monoclinic phase with two inequivalent oxygen atoms,which is difficult to describe with most existing empirical potentials,is well described by this newly developed *** potential provides reasonable predictions of most of the static and dynamic properties of various zirconia *** its clear physical essence,this potential is at least one order of magnitude faster than core—shell based potentials in molecular dynamics *** is because it does not include an ultralight shell that requires an extremely small time *** also provide potential scripts for the widely used simulation packages GULP and LAMMPS.

关键词： zirconia ZrO_(2) empirical potential molecular dynamics simulation

Dust acoustic rogue waves of fractional-order model in dusty plasma

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Communications in Theoretical Physics 2020年第12期72卷 1-17页

作者： Jun-Chao Sun Zong-Guo Zhang Huan-he dong Hong-Wei Yang College of Mathematics and System Science Shandong University of Science and TechnologyQingdao 266590China School of Mathematics Statistics Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China

In this paper,the fractional-order model is used to study dust acoustic rogue waves in dusty ***,based on control equations,the multi-scale analysis and reduced perturbation method are used to derive the(3+1)-dimensional modified Kadomtsev–Petviashvili(MKP)***,using the semi-inverse method and the fractional variation principle,the(3+1)-dimensional time-fractional modified Kadomtsev–Petviashvili(TF-MKP)equation is ***,the Riemann–Liouville fractional derivative is used to study the symmetric property and conservation laws of the(3+1)-dimensional TF-MKP ***,the exact solution of the(3+1)-dimensional TF-MKP equation is obtained by using fractional order transformations and the definition and properties of Bell *** on the obtained solution,we analyze and discuss dust acoustic rogue waves in dusty plasma.

关键词： time-fractional modified Kadomtsev–Petviashvili equation conservation laws dust acoustic rogue waves

SiC JFETs Modular Cascaded Method with Active Clamp Control Strategy for DC Solid-state Circuit Breaker

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CSEE Journal of Power and Energy Systems 2023年第6期9卷 2435-2446页

作者： Hong Duan Wei Wang Zhikang Shuai dong he Daixin Chen Z.John Shen the College of Electrical and Information Engineering Hunan UniversityChangsha 410006China the Department of Electrical and Computer Engineering Illinois Institute of TechnologyChicagoIL 60616 USA.

Power semiconductor devices cascaded topology is one of the most common solutions for solid-state circuit breakers(SSCBs)working in medium-voltage DC ***,when the number of cascaded devices is large,current series technologies of power semiconductor devices will be difficult to be applied since with uneven voltage sharing ***,this paper proposes a novel cascade method of multi-SiC JFETs based on modules *** method consists of two parts:one is a single-gate driver cascaded SiC JFETs topology which is used to form the module,the other one is an active clamp control strategy which ensures that each module is protected from overvoltage when modules are *** proposed cascade method can effectively suppress voltage overshoot of cascading power devices in the switching *** on the proposed cascade method,a 5kV/63A SSCB prototype is ***,an experiment is conducted based on the designed *** results validate the effectiveness of the proposed cascaded method for SSCB.

关键词： Active control clamp DC solid-state circuit breaker modular SiC JFETs series connection

Boosting CO_(2) electroreduction performance over fullerene-modified MOF-545-Co promoted by π –π interaction

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Chinese Chemical Letters 2023年第4期34卷 559-563页

作者： Xue dong Zhifeng Xin dong he Jia-Ling Zhang Ya-Qian Lan Qian-Feng Zhang Yifa Chen Institute of Molecular Engineering and Applied Chemistry Anhui University of TechnologyMa’anshan 243002China National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs Engineering Research Center of MTEES(Ministry of Education)Key Lab.of ETESPG(GHEI)School of ChemistrySouth China Normal UniversityGuangzhou 510006China Jiangsu Key Laboratory of New Power Batteries School of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023China

Metal-organic frameworks(MOFs) have showed high promise in CO_(2)-electroreduction, yet their generally insufficient conductivity or low electron-transfer efficiency have largely restricted the wide-spread applications. herein, fullerene molecules(i.e., C60and C70) have been successfully introduced into the pore-channels of a Co-porphyrin based MOF through a facile strategy. Thus-obtained hybrid materials present higher electron-transfer ability, enhanced CO_(2)adsorption-enthalpy and CO_(2)electroreduction activity. Notably, the charge transfer resistance(Rct) of C60@MOF-545-Co is almost 5 times lower of than that of MOF-545-Co, as well as 1.5 times increased for the CO_(2)adsorption enthalpy. As expect, the FECO of C60@MOF-545-Co(97.0%) is largely higher than MOF-545-Co(70.2%), C60@MOF-545(19.4%), C60(11.5%)and physical mixture(70.3%) and presented as one of the best CO_(2)electroreduction catalysts reported in H-cell system. The facile strategy would give rise to new insight into the exploration of powerful MOFbased hybrid materials in high-efficiency CO_(2)electroreduction.

关键词： Fullerene Metal organic framework Electrocatalytic performance π-πinteraction CO_(2)RR