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Inter-Skeleton Conductive Routes Tuning Multifunctional Conductive Foam for Electromagnetic Interference Shielding, Sensing and Thermal Management

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NANO-MICRO LETTERS 2025年第1期17卷 1-18页

作者： Li, Xufeng Chen, Chunyan Li, Zhenyang Yi, Peng Zou, Haihan Deng, Gao fang, ming He, Junzhe Sun, Xin Yu, Ronghai Shui, Jianglan Pan, Caofeng Liu, Xiaofang Beihang Univ Sch Mat Sci & Engn Beijing 100191 Peoples R China Beihang Univ Inst Atom Mfg Beijing 100191 Peoples R China Tianmushan Lab Xixi Octagon City Hangzhou 310023 Peoples R China Beijing Inst Environm Features Sci & Technol Electromagnet Scattering Lab Beijing 100854 Peoples R China

Unique inter-skeleton conductive films are constructed in polymer *** resistance change of the foam can reach four orders of magnitude under *** foam exhibits strain-adaptive electromagnetic interference shielding performance, anti-interference pressure sensor with high sensitivity over a wide pressure range and compression-regulated Joule heating function. Conductive polymer foam (CPF) with excellent compressibility and variable resistance has promising applications in electromagnetic interference (EMI) shielding and other integrated functions for wearable electronics. However, its insufficient change amplitude of resistance with compressive strain generally leads to a degradation of shielding performance during deformation. Here, an innovative loading strategy of conductive materials on polymer foam is proposed to significantly increase the contact probability and contact area of conductive components under compression. Unique inter-skeleton conductive films are constructed by loading alginate-decorated magnetic liquid metal on the polymethacrylate films hanged between the foam skeleton (denoted as AMLM-PM foam). Traditional point contact between conductive skeletons under compression is upgraded to planar contact between conductive films. Therefore, the resistance change of AMLM-PM reaches four orders of magnitude under compression. Moreover, the inter-skeleton conductive films can improve the mechanical strength of foam, prevent the leakage of liquid metal and increase the scattering area of EM wave. AMLM-PM foam has strain-adaptive EMI shielding performance and shows compression-enhanced shielding effectiveness, solving the problem of traditional CPFs upon compression. The upgrade of resistance response also enables foam to achieve sensitive pressure sensing over a wide pressure range and compression-regulated Joule heating function.

关键词： Inter-skeleton conductive films Conductive polymer foam Liquid metal Electromagnetic interference shielding

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Schur Functors on QF-3 Standardly Stratified Algebras

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Acta Mathematica Sinica,English Series 2008年第2期24卷 311-318页

作者： ming fang Institute of Mathematics Chinese Academy of Sciences Beijing 100080 P. R. China

Let A be a QF-3 standardly stratified algebra and f be a Schur functor corresponding to some projective-injective faithful A-module, denoted by Ae. The main result of this paper is to prove that, if the dominant dimension of A is sufficiently large, then ] induces a full embedding from ￡（△） to eAe-mod which preserves Ext-groups up to certain degrees, where ￡（△） denotes the full subcategory of A-mod whose objects are filtered by standard A-modules. We check this criterion on some typical examples, quantized Schur algebras Sq（n,r） with n≥r and finite-dimensional algebras associated with the Bernstein-Gelfand-Gelfand category O of semisimple complex Lie algebras.

关键词： Schur functor dominant dimension QF-3 algebra standardly stratified algebra

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Application of the Modified nverse Design Method in the Optimization of the Runner Blade of a Mixed-Flow Pump

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Chinese Journal of Mechanical Engineering 2018年第6期31卷 137-153页

作者： Ye-ming Lu Xiao-fang Wang Wei Wang fang-ming Zhou School of Energy and Power Engineering Dalian University of TechnologyDalian 116000China Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education Dalian University of TechnologyDalian 116000China Collaborative Innovation Center of Major Machine Manufacturing in Liaoning Province Dalian 116000China

To improve the design speed and reduce the design cost for the previous blade design method, a modified inverse design method is presented. In the new method, after a series of physical and mathematical simplifications, a sail?like constrained area is proposed, which can be used to configure di erent runner blade shapes. Then, the new method is applied to redesign and optimize the runner blade of the scale core component of the 1400?MW canned nuclear coolant pump in an established multi?optimization system compromising the Computational Fluid Dynamics(CFD) analysis, the Response Surface Methodology(RSM) and the Non?dominated Sorting Genetic Algorithm?II(NSGA?II). After the execution of the optimization procedure, three optimal samples were ultimately obtained. Then, through comparative analysis using the target runner blade, it was found that the maximum e ciency improvement reached 1.6%, while the head improvement was about 10%. Overall, a promising runner blade inverse design method which will benefit the hydraulic design of the mixed?flow pump has been proposed.

关键词： Optimization Mixed?flow pump Inverse design method Runner blade Nuclear coolant

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Improved patch antenna performance by using a metamaterial cover

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第2期8卷 192-196页

作者： ZHU fang-ming HU Jun Department of Electrical Engineering Hangzhou Teachers College Hangzhou 310036 China Center for Optical and Electromagnettc Research Zhejiang University Hangzhou 310027 China

A new patch antenna system with a metamaterial cover is presented in this paper. The impedance, radiation pattem, and directivity of such an antenna are studied. A performance comparison between the conventional patch antenna and the new metamaterial patch antenna is given. The results show that the directivity of the metamaterial patch antenna is significantly improved. The effect of the metamaterial cover＇s layer numbers on the radiation pattern of the patch antenna is also studied.

关键词： Directivity Metamaterial Patch antenna

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A novel dynamic proportional-type iterative learning control design for non-linear systems

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Journal of Control and Decision 2018年第3期5卷 265-276页

作者： ming-fang Chang Harbin Institute of Technology Shenzhen Graduate School ShenzhenP.R.China

This paper presents a model-free adaptive iterative learning control(ILC)scheme called a proportional-type ILC scheme for non-linear *** obvious characteristic of the proposed ILC scheme is that we can easily finish the ILC task just utilising the Lipschitz constant of the *** the proposed ILC scheme,the time-vary learning gain can be produced merely by input and output(I/O)***,the convergence conclusion can be expressed by the ranges of the pseudo-partial derivative and the learning *** actual operation,a reasonable and useful convergence condition by a constant is also provided for *** last,the effectiveness of the proposed ILC scheme is shown by simulations.

关键词： terative learning control proportional-type non-linear systems data-driven

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AMC-based resource allocation in adaptive frequency reused OFDMA-relay networks

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The Journal of China Universities of Posts and Telecommunications 2011年第2期18卷 59-64,71页

作者： CHEN Yu fang Xu-ming School of Information Science and Technology Southwest Jiaotong University Chengdu 610031 China

In orthogonal frequency division multiple access（OFDMA） relay system,for supporting relay transmission,the base station（BS）-the relay station（RS） link must consume an extra part of resource,which may result in serious resource *** order to improve resource utilization,this paper proposes a dynamic resource allocation scheme in adaptive frequency reused OFDMA-relay system based on adaptive modulation and coding（AMC） *** this scheme,relay nodes have two independent antennas and operate in decode-and-forward（DF） and full-duplex *** the BS and RSs share the same subcarriers by spatial multiplexing by two independent *** resource allocation problem is formulated for system downlink throughput *** the optimal solution couldn＇t be obtained easily,a sub-optimal algorithm is *** adaptive frequency reused algorithm with two independent antennas RS improves the system throughput about 24.3 % compared with the orthogonal frequency allocation with single-antenna model,and increases the system throughput 10.4 % compared with adaptive frequency reused algorithms with single-antenna *** is proved that both of the RS with two-antenna model and adaptive frequency reused scheme can improve the system throughput significantly.

关键词： AMC resource allocation adaptive frequency reuse OFDMA relay

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The Assessment of Ocean Wave Energy Along the Coasts of Taiwan

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China Ocean Engineering 2012年第3期26卷 413-430页

作者： LIN Yu-Hsien fang ming-Chung Fishing Boat & Mar.Eng.Research Center National Cheng-Kung University Dept.of Systems & Naval Mechatronic Eng. National Cheng-Kung University

The wave energy resource around the coasts of Taiwan is investigated with wave buoy data covering a 3-year period （2007-2009）. Eleven study sites within the region bounded by the 21.5^°N-25.5°N latitudes and 118°E-122°E longitudes are selected for analysis. The monthly moving-average filter is used to obtain the low-frequency trend based on the available hourly data. After quantifying the wave power and annual wave energy, the substantial resource is the result of Penghu buoy station, which is at the northeastern side of Penghu Island in the Taiwan Strait. it is investigated that the Penghu sea area is determined to be the optimal place for wave energy production according to its abundant resource of northeasterly monsoon waves, sheltering of the Taiwan Island, operation and maintenance in terms of seasonal conditions, and constructability of wave power devices.

关键词： ocean wave energy wave energy converter wave climate Taiwan Strait monsoon waves

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Unstable Surface Modes in Finite Chain Computations:Deficiency of Reflection Coefficient Approach

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Communications in Computational Physics 2010年第6期8卷 143-158页

作者： Shaoqiang Tang ming fang Center for Applied Physics and Technology and LTCSCollege of EngineeringPeking UniversityBeijing 100871China

In this paper,we investigate the stability for a finite harmonic lattice under a certain class of boundary conditions.A rigorous eigenvalue study clarifies that the invalidity of Fourier modes as the basis results in the deficiency of standard reflection coefficient approach for stability *** a certain parameter range,unstable surface modes exist in the form of exponential decay in space,and exponential growth in *** approximate eigen-polynomial is proposed to ease the stability ***,the eigenvalues with small positive real part quantitatively explain the long time instability in wave propagation *** results verify the analysis.

关键词： Unstable surface mode reflection coefficient finite chain

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Analytical Solution for an Ultracold Trapped Ion at the Node of the Standing Wave Laser Without Rotating Wave Approximation

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Communications in Theoretical Physics 2001年第11期36卷 597-600页

作者： fang Xi-ming FENG Mang Department of Physics Hunan Normal UniversityChangsha 410081China Laboratory of Magnetic Resonance and Atomic and Molecular PhysicsWuhan Institute of PhysicsAcademia SinicaWuhan 430071China

A method of solving an ultracold trapped ion at the node of the standing wave laser without rotating wave approximation is proposed and the analytical forms of the eigenfunctions and eigenenergies of the system are pr... 详细信息

关键词： ultracold trapped ion,analytical solution,rotating wave approximation

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Dynamic measurements of serum inhibin B and estradiol: a predictive evaluation of ovarian response to gonadotrophin stimulation in the early stage of IVF treatment

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第1期10卷 35-45页

作者： ming-fang MIAO He-feng HUANG Department of Reproductive Endocrinology Women's Hospital School of Medicine Zhejiang University Hangzhou 310006 China

Objective： We dynamically measured serum inhibin B and estradiol in the early stage of hormonal stimulation to predict the ovarian response in in vitro fertilization （IVF） treatment. Methods： A total of 57 patients （〈40 years of age） who underwent the first cycle of long protocol IVF or introcytoplasmic sperm injection （ICSI） treatment were included. Serum inhibin B, estradiol, follicle stimulating hormone （FSH） and luteinizing hormone （LH） levels were measured four times：（1） on Day 3 of the menstrual cycle （basal）; （2） on the day before the first administration ofgonadotrophin （Gn）（Day 0）; （3） on Day 1 of Gn therapy; and （4） on Day 5 of Gn therapy. Comparisons of these measurements with ovarian responses and pregnancy outcomes were made and analyzed statistically. Results：（1） On Day 1 and Day 5 of recombinant FSH （rFSH） stimulation, ovarian response, i.e., numbers of follicles, oocytes, fertilized oocytes, and embryos, had a positive correlation （rs=0.46-0.61, P 0.000） with raised inhibin B and estradiol concentrations, but a negative correlation （rs=-0.67--0.38, P=0.000 or P〈0.01） with total rFSH dose and total days ofrFSH stimulation. （2） No significant variation （P〉0.05） between the pregnant and non-pregnant groups on the basis of mean age or on all hormone concentrations at four times of the IVF cycle was observed. However, all the seven patients aged 〉35 years did not reach pregnancy. Conclusions：（1） Serum inhibin B and estradiol concentrations obtained shortly after Gn therapy may offer an accurate and early prediction of ovarian response; （2） Low levels of serum inhibin B and estradiol obtained shortly after Gn stimulation indicate the need for a longer period of Gn treatment and a higher daily dosage; （3） No obvious pregnancy difference among patients of age 〈35 years was found; however, IVF pregnancy outcome is significantly lower in women of age 〉35 years.

关键词： Inhibin B Estradiol Ovarian response In vitro fertilization (IVF) Pregnancy

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