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Eutectic-derived synthesis of hierarchically nanoporous copper for electrochemical actuation and solar steam generation

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Nano Research 2024年第3期17卷 2011-2018页

作者： Qingguo Bai Yan Wang fuquan tan Zhonghua Zhang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJingshi Road 17923Jinan 250061China School of Applied Physics and Materials Wuyi UniversityDongcheng Village 22Jiangmen 529020China School of Materials Science and Engineering University of JinanWest Road of Nan Xinzhuang 336Jinan 250022China

The utilization of nanoporous copper(np-Cu)as a metallic actuator has gained attention in recent years due to its cost-effectiveness in comparison to other precious *** this,the enhancement of np-Cu’s actuation performance remains a challenge due to limitations in its strain amplitude and actuation ***,np-Cu has been deemed as a promising material for solar absorption due to its localized surface plasmon resonance ***,practical applications such as solar steam generators(SSGs)utilizing np-Cu have yet to be *** this study,we present the development of hierarchically nanoporous copper(HNC)through the dealloying of a eutectic Al-Cu *** hierarchical structure of the HNC features a combination of ordered flat channels and randomly distributed continuous nanopores,which work in synergy to improve actuation *** ordered flat channels,with a sub-micron scale,facilitate rapid mass transport of electrolyte ions,while the nano-sized continuous pores,due to their large specific surface area,enhance the induced *** results indicate that the HNC exhibits improved actuation performance,with a two times increase in both strain amplitude and rate in comparison to other reported ***,the HNC,for the first time,showcases excellent solar steam generation capabilities,with an evaporation rate of 1.47 kg·m^(-2)·h^(-1) and a photothermal conversion efficiency of 92%under a light intensity of 1 kW·m^(-2),which rivals that of nanoporous gold and silver *** enhanced actuation performance and newly discovered solar steam generation properties of the HNC are attributed to its hierarchically porous structure.

关键词： eutectic alloy dealloying hierarchically nanoporous copper(HNC) actuation solar steam generation

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Dual submanifolds in rational homology spheres

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Science China Mathematics 2017年第9期60卷 1549-1560页

作者： FANG fuquan Department of Mathematics Capital Normal UniversityBeijing 100048China

Let E be a simply connected rational homology sphere. A pair of disjoint closed submanifolds M＋, M_ C ＋ are called dual to each other if the complement ~ - M＋ strongly homotopy retracts onto M- or vice-versa. In this paper, we are concerned with the basic problem of which integral triples （n; m＋, m-） E Na can appear, where n ： dime - 1 and m＋ = codimM~ - 1. The problem is motivated by several fundamental aspects in differential geometry. （i） The theory of isoparametric/I）upin hypersurfaces in the unit sphere Sn＋l initiated by ]~lie Cartan, where M=t= are the focal manifolds of the isoparametric/Dupin hypersurface M C Snq-1, and m~= coincide with the multiplicities of principal curvatures of M. （ii） The Grove-Ziller construction of non-negatively curved Riemannian metrics on the Milnor exotic spheres ~, i.e., total spaces of smooth S3-bundles over $4 homeomorphic but not diffeomorphic to S7, where M~ P~ ~so（4） $3, P -＋ $4 the principal SO（4）-bundle of ~ and P~ the singular orbits of a cohomogeneity one SO（4） ~ SO（3）-action on P which are both of codimension 2. Based on the important result of Grove-Halperin, we provide a surprisingly simple answer, namely, if and only if one of the following holds true：m＋ =m- =n; 1 {1, 2,4, 8}; m＋=m_=1/3n∈ {1,2}; m＋=m_=1/4n∈{1,2}; m＋=m_=1/6n∈{1,2}; n In addition, if E is a homotopy sphere and the ratio n/m＋m-2 （for simplicity let us assume 2 ≤ m_ 〈 m＋）, we observe that the work of Stolz on the multiplicities of isoparametric hypersurfaces applies almost identically to conclude that, the pair can be realized if and only if, either （m＋, m_） = （5, 4） or m＋＋ m- ＋ 1 is divisible by the integer 5（m_）（see the table on Page 1551）, which is equivalent to the existence of （m- - 1） linearly independent vector fields on the sphere Sin＋＋m- by Adams＇ celebrated work. In contrast, infinitely many counterexamples are given if E is a rational homology sphere.

关键词： rational homology sphere dual submanifold cohomogeneity one action isoparametric hypersurface

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骨质疏松性脊柱椎体压缩骨折经皮椎体成形后骨水泥外漏原因及治疗策略

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中国组织工程研究 2025年第16期29卷 3311-3317页

作者：陈小光刘福全张德光北京市平谷区医院骨科北京市101200

背景:随着人口老龄化的加剧,骨质疏松症的发病率逐年上升,而骨质疏松性脊柱椎体压缩骨折作为其中的一种常见并发症,给患者带来了极大的痛苦和不便。经皮椎体成形术作为一种有效的治疗方法,在临床上得到了广泛应用。然而,骨水泥外漏作为... 详细信息

背景:随着人口老龄化的加剧,骨质疏松症的发病率逐年上升,而骨质疏松性脊柱椎体压缩骨折作为其中的一种常见并发症,给患者带来了极大的痛苦和不便。经皮椎体成形术作为一种有效的治疗方法,在临床上得到了广泛应用。然而,骨水泥外漏作为该手术的一个潜在风险,一直是研究者们关注的重点。目的:探讨骨质疏松性椎体压缩骨折经皮椎体成形后骨水泥外漏的原因及处理策略。方法:选择2017年3月至2021年2月于北京市平谷区医院骨科行经皮椎体成形治疗的骨质疏松性椎体压缩骨折患者100例为研究对象,根据术后12个月随访结果分为骨水泥外漏组(n=27)和无骨水泥外漏组(n=73)。Cox比例风险回归分析筛选术后骨水泥外漏的影响因素,用以构建术后骨水泥外漏风险预测列线图模型,并对模型进行评价。行骨水泥外漏治疗后,观察术前、术后3 d、术后12个月时,27例患者的目测类比评分、Oswesry功能障碍指数。结果与结论:①27例骨水泥外漏患者中,24例均为椎间盘终板内渗漏,无明显症状及不适,无需特殊处理;1例发生肺栓塞,请呼吸科协助处理得以好转;2例有症状,行经皮椎间孔镜下骨水泥取出术;②CT值、骨折严重程度、骨水泥黏度、皮质断裂、骨水泥注入量是术后发生骨水泥外漏的独立影响因素(P<0.05);③列线图模型的校准度、区分度均较好,且具有很好的临床实用性;④对于27例术后骨水泥外漏患者,术后3 d、术后12个月时,目测类比评分均显著低于术前,差异有显著性意义(P<0.05);术后12个月的Oswesry功能障碍指数显著低于术后3 d,差异有显著性意义(P<0.05);⑤结果表明,骨水泥注入量、骨水泥黏度、皮质断裂、CT值、骨折严重程度是经皮椎体成形术后发生骨水泥外漏的危险因素。

关键词：骨质疏松性椎体压缩骨折骨质疏松经皮椎体成形术骨水泥外漏原因分析

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New Hybrid AD Methodology for Minimizing the Total Amount of Information Content:A Case Study of Rehabilitation Robot Design

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Chinese Journal of Mechanical Engineering 2020年第6期33卷 177-186页

作者： Tao Yang Xueshan Gao fuquan Dai School of Design Fujian University of TechnologyFuzhou350118China School of Mechatronical Engineering Beijing Institute of TechnologyBeijing100118China Department of Mechanical and Automotive Engineering Fujian University of TechnologyFuzhou350118China Fujian Haiyuan Composite Materials Technology Co. Ltd.FuzhouChina

Converting customer needs into specific forms and providing consumers with services are crucial in product ***,conversion is no longer difficult due to the development of modern technology,and various measures can be applied for product realization,thus increasing the complexity of analysis and evaluation in the design *** focus of the design process has thus shifted from problem solving to minimizing the total amount of information *** paper presents a New Hybrid Axiomatic Design(AD)Methodology based on iteratively matching and merging design parameters that meet the independence axiom and attribute constraints by applying trimming technology,the ideal final results,and technology evolution *** proposed method minimizes the total amount of information content and improves the design ***,a case study of a rehabilitation robot design for hemiplegic patients is *** results indicate that the iterative matching and merging of related attributes can minimize the total amount of information content,reduce the cost,and improve design ***,evolutionary technology prediction can ensure product novelty and improve market *** methodology provides an excellent way to design a new(or improved)product.

关键词： Axiomatic design Amount of information content Trimming Rehabilitation robot

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EQUIFOCAL HYPERSURFACESIN SYMMETRIC SPACESEQUIFOCAL HYPERSURFACESIN SYMMETRIC SPACES

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Chinese Annals of Mathematics,Series B 2000年第4期21卷 473-478页

作者： Fang, fuquan Nankai Institute of Mathematics 94 Weijin Road Tianjin 300071 China

This note investigates the multiplicity problem of principal curvatures of equifocal hypersurfaces in simply connected rank 1 symmetric spaces. Using Clifford representation theory, and the author also constructs inf... 详细信息

关键词： Equifocal hypersurfaces Symmetric space Principal curvature Multiplicity of principal curvatures

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Interaction Kinetics between Sn-Pb Solder Droplet and Au/Ni/Cu Pad

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Journal of Materials Science & Technology 2006年第3期22卷 392-396页

作者： fuquan LI Chunqing WANG Yanhong TIAN Microjoining Lab. School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China

The interracial phenomena of the Sn-Pb solder droplet on and needle-like AuSn4 are formed at the interface after Au/Ni/Cu pad are investigated. A continuous AuSn2 the liquid state reaction （soldering）. The interracial reaction between the solder and Au layer continues during solid state aging with AuSn4 breaking off from the interface and felling into the solder. The kinetics of Au layer dissolution and diffusion into the solder during soldering and aging is analyzed to elucidate intermetallic formation mechanism at the solder/Au pad interface. The concentration of Au near the solder/pad interface is identified to increase and reach the solubility limit during the period of liquid state reaction. During solid state reaction, the thickening of Au-Sn compound is mainly controlled by element diffusion.

关键词： Sn-Pb solder droplet Intermetallic Aging Dissolution

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Theoretical Studies on the Dihydrogen Bonding Between Shortchain Hydrocarbon and Magnesium Hydride

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Chemical Research in Chinese Universities 2014年第5期30卷 831-836页

作者： LI Li BAI fuquan ZHANG Hongxing State Key Laboratory of Theoretical and Computational Chemistry Institute of Theoretical Chemistry Jilin University Changchun 130021 P. R. China

The C--H…H dihydrogen-bonded complexes of methane, ethylene, acetylene, and their derivatives with magnesium hydride were systematically investigated at MP2/aug-cc-PVTZ level. The results confirm that the strength of dihydrogen bonding increases in the following order of proton donors： C（sp3）-H〈C（sp2）-H〈C（sp）-H and chlorine substituents enhance the C-H…H interaction. In the majority of the complexes with a cyclic structure, the Mg-H proton-accepting bond is more sensitive to the surroundings than C-H proton-donating bond. The nature of the electrostatic interaction in these C-H…H dihydrogen bonds was also unveiled by means of the atoms in mo- lecules（AIM） analysis. The natural bond orbital（NBO） analysis suggests that the charge transfer in the cyclic com- plexes is characteristic of dual-channel. The direction of the net charge transfer in the cyclic complexes is contrary to that previously found in dihydrogen bonded systems.

关键词： Dihydrogen bond Atom in molecule(AIM) theory Bond critical point Natural bond orbital(NBO) Chargetransfer

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Mitochondria in the pathogenesis of diabetes:a proteomic view

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Protein & Cell 2012年第9期3卷 648-660页

作者： Xiulan Chen Shasha Wei fuquan Yang Key Laboratory of Protein and Peptide Pharmaceuticals and Laboratory of Proteomics Institute of BiophysicsChinese Academy of SciencesBeijing 100101China Graduate University of Chinese Academy of Sciences Beijing 100149China

Diabetes mellitus is a complex metabolic disorder characterized by chronic hyperglycemia due to absolute or relative lack of *** great efforts have been made to investigate the pathogenesis of diabetes,the underlying mechanism behind the development of diabetes and its complications remains *** evidence has linked mitochondrial modification to the pathogenesis of diabetes and its complications and they are also observed in various tissues affected by *** is an attractive tool for the study of diabetes since it allows researchers to compare normal and diabetic samples by identifying and quantifying the differentially expressed proteins in tissues,cells or *** progress has already been made in mitochondrial proteomics to elucidate the role of mitochondria in the pathogenesis of diabetes and its *** studies on the changes of mitochondrial protein specifically post-translational modifications during the diabetic state using proteomic tools,would provide more information to better understand diabetes.

关键词： mitochondria proteomics T1DM T2DM diabetes complication

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Forward and symmetric Wick-Itôintegrals with respect to fractional Brownian motion

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Frontiers of Mathematics in China 2021年第2期16卷 623-645页

作者： fuquan XIA Litan YAN Jianhui ZHU Department of Mathematics College of ScienceBengbu UniversityBengbu 233030China Department of Statistics College of ScienceDonghua UniversityShanghai 201620China

Let BH={BHt,t≥0}be a fractional Brownian motion with Hurst index H∈(0,1).Inspired by pathwise integrals and Wick product,in this paper,we consider the forward and symmetric Wick-Itôintegrals with respect to BH as follows:∫t0us⋄d−BHs=limε↓01ε∫t0us⋄(BHs+ε−BHs)ds,∫t0us⋄d∘BHs=limε↓012ε∫t0us⋄(BHs+ε−BH(s−ε)∨0)ds,in probability,where◊denotes the Wick *** show that the two integrals coincide with divergence-type integral of BH for all H∈(0,1).

关键词： Fractional Brownian motion(fBm) forward integral Malliavin calculus Wick product

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基于自适应滑模控制器的PMSM调速策略研究

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郑州大学学报（理学版） 2025年第1期57卷 88-94页

作者：王要强王秋旭聂福全张晓光梁军郑州大学电气与信息工程学院河南郑州450001 河南省电力电子与电力系统工程技术研究中心河南郑州450001 河南科技学院机电学院河南新乡453400 北方工业大学电气与控制工程学院北京100144 卡迪夫大学工程学院英国卡迪夫CF243AA

为了提高永磁同步电机的调速性能,滑模控制逐渐取代PI控制被引入控制系统中。但是传统滑模控制中趋近律的趋近速度慢与固有抖振问题制约着滑模控制的发展,为此提出一种改进的滑模趋近律。首先,为了解决传统等速趋近律中趋近速度和抖振... 详细信息

为了提高永磁同步电机的调速性能,滑模控制逐渐取代PI控制被引入控制系统中。但是传统滑模控制中趋近律的趋近速度慢与固有抖振问题制约着滑模控制的发展,为此提出一种改进的滑模趋近律。首先,为了解决传统等速趋近律中趋近速度和抖振难以平衡的问题,在所提趋近律中引入系统状态变量,并在滑模增益中引入指数项,使其在保证趋近速度的同时抑制滑模抖振。其次,由于开关函数在零点附近具有不连续的特性,会引起滑模抖振,为此采用sat函数代替常规开关函数,能够在保证响应速度的前提下抑制滑模抖振。然后,基于所提趋近律,设计永磁同步电机的滑模速度控制器。最后,仿真和实验结果表明,所提趋近律可以提高永磁同步电机调速系统的控制性能。

关键词：永磁同步电机滑模控制自适应趋近律 sat函数系统状态量

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