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Nano-Micro Letters 2023年第1期15卷 293-306页

作者： jie Li he Sun Shuang-Qin Yi Kang-Kang Zou Dan Zhang Gan-Ji Zhong Ding-Xiang Yan Zhong-ming Li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065People’s Republic of China School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065People’s Republic of China

Highly conductive polymer composites(CPCs) with excellent mechanical flexibility are ideal materials for designing excellent electromagnetic interference(EMI) shielding materials,which can be used for the electromagnetic interference protection of flexible electronic *** is extremely urgent to fabricate ultra-strong EMI shielding CPCs with efficient conductive *** this paper,a novel silver-plated polylactide short fiber(Ag@PL ASF,AAF) was fabricated and was integrated with carbon nanotubes(CNT) to construct a multi-scale conductive network in polydimethylsiloxane(PDMS) *** multi-scale conductive network endowed the flexible PDMS/AAF/CNT composite with excellent electrical conductivity of 440 S m-1and ultra-strong EMI shielding effectiveness(EMI SE) of up to 113 dB,containing only 5.0 vol% of AAF and 3.0 vol% of CNT(11.1wt% conductive filler content).Due to its excellent flexibility,the composite still showed 94% and 90% retention rates of EMI SE even after subjected to a simulated aging strategy(60℃ for 7 days) and 10,000 bending-releasing *** strategy provides an important guidance for designing excellent EMI shielding materials to protect the workspace,environment and sensitive circuits against radiation for flexible electronic devices.

关键词： Flexible conductive polymer composites Silver-plated polylactide short fiber Carbon nanotube Electromagnetic interference shielding Multi-scale conductive network

Enhancing betavoltaic nuclear battery performance with 3D P^(+)PNN^(+)multi-groove structure via carrier evolution

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Nuclear Science and Techniques 2023年第12期34卷 1-16页

作者： Hou‑Jun he Yun‑Cheng Han Xiao‑Yu Wang Yu‑Min Liu Jia‑Chen Zhang Lei Ren ming‑jie Zheng hefei Institutes of Physical Science Chinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China School of Nuclear Science and Engineering East China University of TechnologyNanchang 330013China School of Nuclear Technology and Chemistry and Biology Hubei University of Science and TechnologyXianning 437100China

Betavoltaic nuclear batteries offer a promising alternative energy source that harnesses the power of beta particles emitted by *** satisfy the power demands of microelectromechanical systems(MEMS),3D structures have been proposed as a potential ***,this paper introduces a novel 3D^(63)Ni–SiC-based P^(+)PNN^(+)structure with a multi-groove design,avoiding the need for PN junctions on the inner surface,and thus reducing leakage current and power *** Carlo simulations were performed considering the fully coupled physical model to extend the electron–hole pair generation rate to a 3D structure,enabling the efficient design and development of betavoltaic batteries with complex 3D *** a result,the proposed model produces the significantly higher maximum output power density of 19.74μW/cm^(2) and corresponding short-circuit current,open-circuit voltage,and conversion efficiency of 8.57μA/cm^(2),2.45 V,and4.58%,respectively,compared with conventional planar *** analysis of the carrier transport and collection characteristics using the COMSOL Multiphysics code,we provide deep insights regarding power increase,and elucidate the discrepancies between the ideal and simulated performances of betavoltaic *** work offers a promising approach for the design and optimization of high-output betavoltaic nuclear batteries with a unique 3D design,and serves as a valuable reference for future device fabrication.

关键词： Betavoltaic nuclear battery High-output power density Three-dimensional structure Carrier drift–diffusion Carrier recombination Carrier collection efficiency

Stability of Weak Solutions for the Compressible Navier-Stokes-Poisson Equations

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Acta Mathematicae Applicatae Sinica 2012年第3期28卷 597-606页

作者： Ru-xu LIAN ming-jie LI College of Mathematics and Information Science North China University of Water Resources and Electric PowerZhengzhou 450011China School of Mathematical Sciences Capital Normal UniversityBeijing 100048China

In this paper, we consider the isentropic compressible Navier-Stokes-Poisson equations arising from transport of charged particles or motion of gaseous stars in astrophysics. We are interested in the case that the viscosity coefficients depend on the density and shall degenerate in the appearance of （density） vacuum, and show the Ll-stability of weak solutions for arbitrarily large data on spatial multi-dimensional bounded or periodic domain or whole space.

关键词： compressible fluid Navier-Stokes-Poisson equations stability

Organ-specific effects of brassinosteroids on stomatal production coordinate with the action of TOO MANY MOUTHS

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Journal of Integrative Plant Biology 2015年第3期57卷 247-255页

作者： ming Wang Kezhen Yang jie Le Key Laboratory of Plant Molecular Physiology Institute of Botanythe Chinese Academy of Sciences University of Chinese Academy of Sciences

In Arabidopsis,stomatal development initiates after protodermal cells acquire stomatal lineage cell *** or their precursors communicate with their neighbor epidermal cells to ensure the ＂one cell spacing＂ *** signals from EPF/EPFL peptide ligands received by TOO MANY MOUTHS（TMM）and ERECTA-family receptors are supposed to be transduced by YODA MAPK cascade.A basic helix-loop-helix transcription factor SPEECHLESS（SPCH） is another key regulator of stomatal cell fate determination and asymmetric entry divisions,and SPCH activity is regulated by YODA MAPK ***（BR） signaling,one of the most well characterized signal transduction pathways in plants,contributes to the control of stomatal *** opposite organ-specific effects of BR on stomatal production were *** we confirm thatstomatal production in hypocotyls is controlled by BR *** and CYCD4 are not essential for BR stomata-promoting ***,we found that BR could confer tmm hypocotyls clustered stomatal phenotype,indicating that the BR organ-specific effects on stomatal production might coordinate with the TMM organ-specific actions.

关键词： Arabidopsis brassinosteroids development stomata

Realizing Enveloping Algebras via Varieties of Modules

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Acta Mathematica Sinica,English Series 2010年第1期26卷 29-48页

作者： ming DING jie XIAO Fan XU Department of Mathematics Tsinghua University Beijing 100084~ P. R~ China

By using the Ringel-Hall algebra approach, we investigate the structure of the Lie algebra L（A） generated by indecomposable constructible sets in the varieties of modules for any finite- dimensional C-algebra A. We obtain a geometric realization of the universal enveloping algebra R（A） of L（A）, this generalizes the main result of Riedtmann. We also obtain Green＇s formula in a geometric form for any finite-dimensional C-algebra A and use it to give the comultiplication formula in R（A）.

关键词： Ringel-Hall algebra constructible set variety universal enveloping algebra

Experimental and Comparison Study on Two Solar Dish Systems with a High Concentration Ratio

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Journal of Thermal Science 2019年第6期28卷 1205-1211页

作者： CheN Haifei LI Guiqiang YANG jie ZHANG Fuwei LIANG ming JI jie School of Petroleum Engineering Changzhou UniversityChangzhou 213164China School of Engineering University of HullHull HU67RXUK Department of Thermal Science and Energy Engineering University of Science and Technology of ChinaHefei 230026China

Two high concentrating solar systems have been established with dish concentrator and plane-mirrors array *** the paper,the thermal performance has been experimentally studied with jet water cooling device and flat microchannel water-cooled *** experimental results show that the maximum surface temperature difference of the dish concentrating system is greater than 20°C,while the plane-mirrors array system is lower than 4°*** indicates that the plane-mirrors array concentrator has better *** the concentration ratio increases,the electrical efficiency of the concentrating photovoltaic system gradually *** the concentration ratio is 200,the electrical efficiency of the photovoltaic system is 25%.The concentration ratio of 500 times or less is considered to be a suitable value,and then the electrical efficiency can still exceed 20%.It is found that the plane-mirrors array solar system is more suitable for the photovoltaic system than dish type system,which is only suitable for thermal power generation system.

关键词： high concentration ratio thermal science dish system solar energy

Diophantine equations and Fermat's last theorem for multivariate(skew-)polynomials

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Applied Mathematics(A Journal of Chinese Universities) 2024年第1期39卷 159-173页

作者： PAN jie JIA Yu-ming LI Fang School of Mathematical Sciences Zhejiang UniversityHangzhou 310058China henan Experimental High School Zhengzhou 450003China

Fermat’s Last Theorem is a famous theorem in number theory which is diﬃcult to ***,it is known that the version of polynomials with one variable of Fermat’s Last Theorem over C can be proved very *** aim of this paper is to study the similar problems about Fermat’s Last Theorem for multivariate(skew)-polynomials with any characteristic.

关键词： Fermat's last theorem polynomial ring skew polynomial ring

Preparation and electrochemical performance of double perovskite La_2CoMnO_6 nanofibers

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International Journal of Minerals,Metallurgy and Materials 2018年第8期25卷 950-956页

作者： jie Fu heng-yan Zhao jie-run Wang Yu Shen ming Liu College of Environmental and Chemical Engineering Dalian Jiaotong University

Through electrospinning,La_2Co Mn O_6 nanofibers were prepared from a polyvinylpyrrolidone/lanthanum nitrate–cobalt acetate–manganese acetate(PVP/LCM)precursor and were used as electrode *** morphologies and structures of the samples were characterized by field-emission scanning electron microscopy(FE-SEM),transmission electron microscopy(TEM),X-ray diffraction(XRD),and Brunauer-Emmett-Teller(BET)specific surface area *** results show that the prepared La_2Co Mn O_6 nanofibers are stable,one-dimensional structures formed from interconnected La_2Co Mn O_(6 )nanoparticles with a diamond-like crystal *** specific surface area of the fibers is 79.407 m^2·g^(-1).Electrochemical performance tests with a three-electrode system reveal the specific capacitance of the La_2Co Mn O_6 nanofibers as 109.7 F·g^(-1) at a current density of 0.5 A·g^(-1).After 1000 charge-discharge cycles at a current density of 1 A·g^(-1),the specific capacitance maintains 90.9%of its initial value,demonstrating a promising performance of the constraint capacitance and good cyclic stability.

关键词： electrospinning double perovskite super capacitor electrode materials

On parametric approach of aerial robots' visual navigation

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Journal of Systems Engineering and Electronics 2008年第5期19卷 1010-1016页

作者： Zhou Yu Huang Xianlin jie ming Yin Hang Harbin Inst. of Technology Harbin 150001 P. R. China

In aerial robots＇ visual navigation, it is essential yet very difficult to detect the attitude and position of the robots operated in real time. By introducing a new parametric model, the problem can be reduced from almost unmanageable to be partly solved, though not fully, as per the requirement. In this parametric approach, a multi-scale least square method is formulated first. By propagating as well as improving the parameters down from layer to layer of the image pyramid, a new global feature line can then be detected to parameterize the attitude of the robots. Furthermore, this approach paves the way for segmenting the image into distinct parts, which can be realized by deploying a Bayesian classifier on the picture cell level. Comparison with the Hough transform based method in terms of robustness and precision shows that this multi-scale least square algorithm is considerably more robust to noises. Some discussions are also given.

关键词： parametric model aerial robots visual navigation multi-scale least square.

A novel robust design method for improving stability of optimized structures

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Acta Mechanica Sinica 2015年第1期31卷 104-111页

作者： ming-jie Cao Hai-Tao Ma Peng Wei State Key Laboratory of Subtropical Building Science Department of Civil Engineering South China University of Technology State Key Laboratory of Structural Analysis of Industrial Equipment Dalian University of Technology

It is known that structural optimization may lead to designs of structures having low stability and sometimes even kinematically unstable designs. This paper presents a robust design method for improving the stability of opti mized structures. A new approach is proposed, in which cer tain perturbation loads are introduced and the corresponding compliance is added to the objective function as a penaliza tion. The stability of the optimized structures can thus be improved substantially by considering structural responses to the original and the introduced loads. Numerical exam ples show the simplicity and effectiveness of the proposed method.

关键词： Structural optimization Robust design Penal-ization Perturbation loads