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Nano Research 2025年第1期18卷 508-519页

作者： Ke jiang Zhi Chen Ji Yu Chen zheng Shan Huang Ming Wang Chongqing Key Laboratory of Soft-Matter Material Manufacturing School of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China School of Mechanics Civil Engineering and ArchitecturesNorthwestern Polytechnical UniversityXi’an 710072China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang 515200China

Herein,the electromagnetic shielding performance of surface concave-convex(SC)and zig-zag micro-arrays was studied by using a simulation prediction and a three-dimensional(3D)printing custom ***,surface stripe concaveconvex(SSC)and surface cylindrical concave-convex(SCC)micro-arrays with or without zig-zag micro-arrays are designed,and their shielding performance is simulated in multi-bands(C-,X-band).The multiwalled carbon nanotubes/polydimethylsiloxane composites(MWCNT/PDMS)with different SC structures and different electrical conductivity are molded in acrylonitrile-butadiene-styrene copolymer(ABS)molds which are printed by a 3D *** results show that the electromagnetic interference shielding effectiveness(EMI SE)of the samples can be enhanced by constructing the SC micro-arrays with zig-zag micro-arrays,and improving with the increase of conductivity and *** addition,the shielding mechanism of the SC-MWCNT/PDMS composites is investigated and discussed by an electromagnetic simulation.

关键词： surface micro-arrays electrical properties electromagnetic interference(EMI)shielding three-dimensional(3D)printing

Symmetric Semi-perfect Obstruction Theory Revisited

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Acta Mathematica Sinica,English Series 2023年第2期39卷 209-239页

作者： yun Feng jiang College of Mathematics and Statistics Sciences Shenzhen UniversityShenzhen518060China Department of Mathematics University of Kansas405 Snow Hall1460 Jayhawk BlvdLawrence66045USA

In this paper we survey some results on the symmetric semi-perfect obstruction theory on a Deligne-Mumford stack X constructed by Chang-Li,and Behrend’s theorem equating the weighted Euler characteristic of X and the virtual count of X by symmetric semi-perfect obstruction *** an application,we prove that Joyce’s d-critical scheme admits a symmetric semi-perfect obstruction theory,which can be applied to the virtual Euler characteristics by jiang-Thomas.

关键词： Symmetric semi-perfect obstruction theory the Behrend function algebraic d-critical scheme virtual signed Euler characteristics

Kobayashi’s and Teichmuller’s Metrics and Bers Complex Manifold Structure on Circle Diffeomorphisms

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Acta Mathematica Sinica,English Series 2020年第3期36卷 245-272页

作者： yun Ping jiang Department of Mathematics Queens College of the City University of New York FlushingNY 11367-1597USA Department of Mathematics Graduate School of the City University of New York365 Fifth A venueNew YorkNY 10016USA

Given a modulus of continuity ω,we consider the Teichmuller space TC1+ω as the space of all orientation-preserving circle diffeomorphisms whose derivatives are ω-continuous functions modulo the space of Mobius transformations preserving the unit *** study several distortion properties for diffeomorphisms and quasisymmetric *** these distortion properties,we give the Bers complex manifold structure on the Teichm(u| ")ller space TC^1+H as the union of over all0 <α≤1,which turns out to be the largest space in the Teichmuller space of C1 orientation-preserving circle diffeomorphisms on which we can assign such a ***,we prove that with the Bers complex manifold structure on TC^1+H ,Kobayashi’s metric and Teichmuller’s metric coincide.

关键词： Bers complex manifold structure circle diffeomorphism modulus of continuity quasisymmetric circle homeomorphism Teichmuller space Kobayashi's metric Teichmuller's metric

The Moduli Space of Stable Coherent Sheaves via Non-archimedean Geometry

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Acta Mathematica Sinica,English Series 2022年第10期38卷 1722-1780页

作者： yun Feng jiang Department of Mathematics University of Kansas405 Snow Hall1460 Jayhawk BlvdLawrence USA

We provide a construction of the moduli space of stable coherent sheaves in the world of non-archimedean geometry,where we use the notion of Berkovich non-archimedean analytic *** motivation for our construction is Tony Yue Yu’s non-archimedean enumerative geometry in Gromov-Witten *** construction of the moduli space of stable sheaves using Berkovich analytic spaces will give rise to the non-archimedean version of Donaldson-Thomas *** this paper we give the moduli construction over a non-archimedean field *** use the machinery of formal schemes,that is,we define and construct the formal moduli stack of(semi)-stable coherent sheaves over a discrete valuation ring R,and taking generic fiber we get the non-archimedean analytic moduli space of semistable coherent sheaves over the fractional non-archimedean field *** generalize Joyce’s dcritical scheme structure in[37]or Kiem-Li’s virtual critical manifolds in[38]to the world of formal schemes,and Berkovich non-archimedean analytic *** an application,we provide a proof for the motivic localization formula for a d-critical non-archimedean K-analytic space using global motive of vanishing cycles and motivic integration on oriented formal d-critical *** generalizes Maulik’s motivic localization formula for the motivic Donaldson-Thomas invariants.

关键词： Non-archimedean Donaldson-Thomas theory Berkovich space analytic d-critical scheme motivic localization

Synthesis and Properties of a Heteronuclear Ag(Ⅰ)/Ni(Ⅱ) Complex

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Chemical Research in Chinese Universities 2006年第3期22卷 283-286页

作者： WANG jiang-yun GU Wen WANG Wen-zhen LIU Xin LIAO Dai-zheng Department of Chemistry Nankai University Tianjin 300071 P. R. China

A complex, Ni （en）2Ag3 （CN） s （ en =ethylenediamine）, was obtained through the reaction of [ Ag （ CN ）2 ]^- units with Ni II -diamine cation C Ni （en）2]^2＋, and the structure was determined by single crystal X-ray diffraction. It is indicated that the complex has a 3D architecture through the silver-silver interactions and the bridging eyano groups. This complex displays interesting luminescent properties caused by argentophilieity at room temperature in solid state.

关键词： Single crystal X-ray diffraction Silver-silver interaction Argentophilieity luminescent property

Dependence of tensile properties on microstructural features of bimodal-sized ferrite/cementite steels

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Journal of Iron and Steel Research International 2017年第1期24卷 67-76页

作者： jiang-li Ning yun-li Feng Ming-ming Wang Shen-bai zheng Jie Li College of Metallurgy and Energy North China University of Science and TechnologyTangshan 063009HebeiChina

A medium-carbon steel was processed through different warm rolling techniques,and the microstructural features with bimodal grain size distribution were found to be *** combination of strength and ductility was ameliorated in the steel processed through warm rolling characterized by biaxial *** enhanced strength is attributed to the densely distributed fine intragranular cementite particles and the small grain size in the coarse grain *** enhanced uniform elongation is due to the improved work hardening behavior at the large-strain *** work hardening behavior is predominantly ascribed to the finely dispersed intragranular *** relatively small grain size with nearly equiaxed shape in the coarse grain regions helps stabilize the uniform deformation to a large strain.

关键词： Tensile property Ferrite/cementite steel Bimodal-sized structure Warm rolling Work hardening rate

羟基磷灰石改性竹笋壳生物炭的合成及吸附性能研究

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分析测试学报 2025年第1期44卷 126-134页

作者：夏蒸雷兰石铁应鲍云云梁汝萍邱建丁东华理工大学核资源与环境国家重点实验室江西南昌330013 南昌大学化学化工学院江西南昌330031

该研究以竹笋壳为原料合成了具有多孔结构和亲水性磷酸基团的羟基磷灰石改性竹笋壳生物炭(BSHAP),用于高效吸附废水中的铀酰离子(UO_(2)^(2+))。BS-HAP的多孔结构可有效增加与UO_(2)^(2+)的接触面积,促进对UO_(2)^(2+)的吸附;BS-HAP中... 详细信息

该研究以竹笋壳为原料合成了具有多孔结构和亲水性磷酸基团的羟基磷灰石改性竹笋壳生物炭(BSHAP),用于高效吸附废水中的铀酰离子(UO_(2)^(2+))。BS-HAP的多孔结构可有效增加与UO_(2)^(2+)的接触面积,促进对UO_(2)^(2+)的吸附;BS-HAP中的磷酸基团可为化学吸附UO_(2)^(2+)提供结合位点,使得BS-HAP对UO_(2)^(2+)具有优异的吸附性能。同时,Ca^(2+)与UO_(2)^(2+)之间的离子交换作用以及生物炭与UO_(2)^(2+)之间的静电相互作用,协同促进了BSHAP对UO_(2)^(2+)的吸附。在酸性条件下,BS-HAP对UO_(2)^(2+)的吸附容量为815.2 mg·g^(-1)。BS-HAP不仅对UO_(2)^(2+)具有强的吸附能力,还具有良好的选择性和稳定性,即使经多次循环使用,仍能保持对UO_(2)^(2+)的高效去除能力。BS-HAP为含铀废水处理提供了有效方法,对推动绿色可持续的废水处理技术发展具有重要意义。

关键词：竹笋壳生物炭羟基磷灰石铀酰离子吸附

Decay of the 2D Periodic Stationary Viscous Surface Waves

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Acta Mathematica Sinica,English Series 2018年第12期34卷 1837-1862页

作者： yun Rui zheng School of Mathematical Sciences Qufu Normal University

We consider the evolution of viscous fluids in a 2D horizontally periodic slab bounded above by a free top surface and below by a fixed fiat bottom. This is a free boundary problem. The dynamics of the fluid are governed by the incompressible stationary Navier-Stokes equations under the influence of gravity and the effect of surface tension. We develop the global theory of solutions in low regularity Sobolev spaces for small data by nonlinear energy estimates.

关键词： Free boundary problems global existence Navier Stokes equations

基于语音信号时频特征融合的帕金森病检测方法

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郑州大学学报（理学版） 2025年第1期57卷 53-60页

作者：王晨哲季薇郑慧芬李云南京邮电大学计算机学院江苏南京210023 南京邮电大学通信与信息工程学院江苏南京210003 南京医科大学附属老年医院江苏南京210009

发音障碍是帕金森病的早期症状之一。近年来,基于语音信号的帕金森病检测的研究大多采用梅尔刻度下的相关语音特征与深度神经网络模型相结合的方法。然而,现有的模型无法充分关注语音信号的全局时序信息,且梅尔刻度特征在准确表征帕金... 详细信息

发音障碍是帕金森病的早期症状之一。近年来,基于语音信号的帕金森病检测的研究大多采用梅尔刻度下的相关语音特征与深度神经网络模型相结合的方法。然而,现有的模型无法充分关注语音信号的全局时序信息,且梅尔刻度特征在准确表征帕金森病的病理信息方面效果有限。为此,提出了一种基于语音时频特征融合的帕金森病检测方法。首先,提取语音的梅尔频率倒谱系数,并将其作为模型的输入。接着,在已有的S-vectors模型中引入Conformer编码器模块,以提取语音的时域全局特征。最后,将与帕金森病语音检测相关的频域全局特征嵌入时域特征中进行时频信息融合,以实现帕金森病语音检测。在公开帕金森病语音数据集和自采语音数据集上验证了方法的有效性。

关键词：帕金森病梅尔频率倒谱系数 S-vectors Conformer 时频特征融合

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Motivic Milnor Fibre of Cyclic L∞-algebras

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Acta Mathematica Sinica,English Series 2017年第7期33卷 933-950页

作者： yun Feng jiang Department of Mathematics University of Kansas405 Snow Hall 1460 Jayhawk BlvdLawrence KS 66045USA

Abstract We define the motivic Milnor fiber of cyclic L∞-algebras of dimension three using the method of Denef and Loeser of motivic integration. It is proved by Nicaise and Sebag that the topo- logical Euler characteristic of the motivic Milnor fiber is equal to the Euler characteristic of the étale cohomology of the analytic Milnor fiber. We prove that the value of Behrend function on the germ moduli space determined by a cyclic L∞-algebra L is equal to the Euler characteristic of the analytic Milnor fiber. Thus we prove that the Behrend function depends only on the formal neighborhood of the moduli space.

关键词： L∞-algebra motivic Milnor fiber analytic Milnor fiber Donaldson Thomas invariants,the Behrend function