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Mechanical Behavior of Bamboo,and Its Biomimetic Composites and Structural Members:A Systematic Review

Journal of Bionic Engineering 2024年第1期21卷 56-73页

作者： Shanyu Han Yuyuan He Hanzhou Ye Xueyong Ren Fuming Chen Kewei Liu sheldon q.shi Ge Wang Institute of Biomaterials for Bamboo and Rattan Resources International Centre for Bamboo and RattanBeijing 100102China Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo&Rattan Science and Technology Beijing 100102China National Forestry and Grassland Engineering Technology Center for Wood Resources Recycling College of Materials Science and TechnologyBeijing Forestry UniversityBeijing 100083China International Bamboo and Rattan Organization Beijing 100102China School of Civil Engineering Tsinghua UniversityBeijing 100084China Mechanical Engineering Department University of North TexasDentonTX 762077102USA

Bamboo is a typical biological material widely growing in nature with excellent physical and mechanical *** is lightweight with high strength and *** naturally optimized bamboo structure,which has inspired global material scientists and engineers for decades,is significantly important for the bionic design of novel structural materials with ultra-light,ultra-strong,or ultra-tough and comprehensive *** literature on innovative composite materials and structural members inspired by bamboo are reviewed in this paper,and the research progress and prospects in this field are expounded in three ***,the structural characteristics of the bamboo wall layer along the thickness and height directions are described in terms of chemical composition,gradient structure,pore structure,and hollow structure with variable ***,this paper summarizes the research progress on new composite materials and structural components by applying bamboo’s structural features from the perspective of sustainability,designability,and ***,given the limitations of current research,the biomimetic scientific research on bamboo’s structural characteristics is prospected from the interpretation of bamboo structure,new bamboo-like materials,and structural design optimization perspectives,providing a reference for future research on biomimetic aspects of biomass.

关键词： Bamboo Structural characteristics-Bamboo-like material Physical and mechanical properties

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In-Situ Chemosynthesis of ZnO Nanoparticles to Endow Wood with Antibacterial and UV-Resistance Properties

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Journal of Materials Science & Technology 2017年第3期33卷 266-270页

作者： Youming Dong Yutao Yan Huandi Ma shifeng Zhang Jianzhang Li Changlei Xia sheldon q.shi Liping Cai MOE Key Laboratory of Wooden Material Science and Application Beijing Forestry University Beijing 100083 China College of Biological Science and Technology Beijing Forestry University Beijing 100083 China Department of Mechanical and Energy Engineering University of North Texas 3940 N Elm St. Suite F101 Denton TX 76207 United States

Hybrid wood materials have attracted considerable attention because they have combined advantages of both wood and inorganic compounds. This work investigated the microstructural morphology, thermal stability, ultraviolet（UV） stability, and antibacterial property of composites made from wood/ZnO hybrid materials through a facile in-situ chemosynthesis methods. The X-ray diffraction（XRD） and thermogravimetric analysis（TGA） results indicated that the synthesized ZnO particles had an average grain size of about 10.8 nm. The scanning electron microscopy（SEM） observations showed that ZnO nanoflowers self-assembled with nanosheets were presented in wood cell lumens and increased with increasing Zn^（2＋）concentrations. ZnO nanoparticles were also generated in the wood cell wall, which was confirmed by the results of energy-dispersive spectroscopy（EDS）. The TGA tests also indicated that the thermal stability of wood/ZnO hybrid materials was improved after the formation of ZnO inorganic particles. Finally, the results of antibacterial efficacy tests and UV resistance tests revealed that ZnO nanoparticles showed a promising future as antimicrobial agents against Escherichia coli（***） and UV resistance agents for wood protection.

关键词： Hybrid wood material Nanoflowers Zinc oxide Antibacterial property UV-resistance

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A Soy Protein-Based Composite Film with a Hierarchical Structure Inspired by Nacre

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Journal of Renewable Materials 2022年第3期10卷 639-652页

作者： Yecheng Xu Chaojie Xu Mingsong Chen Jianzhang Li Ling Zeng Jing Luo qiang Gao sheldon q.shi Beijing Key Laboratory of Wood Science and Engineering&MOE Key Laboratory of Wooden Material Science and Application Beijing Forestry UniversityBeijing100083China Nanning SCISKY Waterborne Technologies Co. Ltd.Nanning530105China College of Materials Science and Engineering Nanjing Forestry UniversityNanjing210037China College of Engineering Department of Mechanical and Energy EngineeringUniversity of NorthTexasDenton76207-7102USA

Soy protein-based composite film is a potential replacement for petroleum-based film with multipurpose applica-tions and cleaner *** is difficult to improve both the tensile strength and toughness of a protein-based film without sacrificing its *** this study,inspired by the hierarchical structure of nacre,a facile yet delicate strategy was developed to fabricate a novel bio-based film with excellent toughness and high ***(TGA)crosslinked soy protein(SPI)as hard phase and thermoplastic polyurethane elastomer(TPU)as soft phase comprise an alternative lay-up hierarchical *** interface of these two phases is enhanced using triglycidylamine(TGA)surface-modified TPU(MTPU).The tensile strength of SPI/MTPU/TGA films increases by 392%to 7.78 MPa and their toughness increases by 391%to 8.50 MJ/m^(3) compared to soy protein/glycerol *** proposed hierarchical structure can also be extended to other high-performance materials and polymers.

关键词： Soy protein-based composite film hierarchical structure TPU enhancement mechanism

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基于数值模拟气液比对豆胶气泡雾化的影响

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东北林业大学学报 2014年第2期42卷 111-115,135页

作者：花军张文程贾娜 sheldon q.shi 东北林业大学哈尔滨150040 深圳市特尔佳科技股份有限公司美国北德州大学

根据气泡雾化理论,以豆胶为研究对象,对不同气液比豆胶与空气在气泡雾化喷嘴内部的流动情况进行了混合数值模拟。结果表明:试验条件下,气液比对气液在喷嘴内的流场分布有显著影响;雾化总能量,随气液比的增大而降低;气耗量,随气液比的增... 详细信息

根据气泡雾化理论,以豆胶为研究对象,对不同气液比豆胶与空气在气泡雾化喷嘴内部的流动情况进行了混合数值模拟。结果表明:试验条件下,气液比对气液在喷嘴内的流场分布有显著影响;雾化总能量,随气液比的增大而降低;气耗量,随气液比的增大而升高;最佳气液比为0.04。以混合模拟得到的出口数据为条件进行了仿真验证,结果表明:通过雾场仿真得到的最佳气液比,与混合模拟得到的理论最佳气液比值相吻合。

关键词：气液比豆胶数值模拟气泡雾化喷嘴

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豆基蛋白胶气泡雾化机理的数值模拟

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东北林业大学学报 2013年第2期41卷 107-111页

作者：张文程花军贾娜 sheldon q.shi 东北林业大学哈尔滨150040 美国北德州大学

根据豆基蛋白胶的流动特性,确定了其本构方程,为数值模拟研究提供了相关的参数;选择设计了一种气泡雾化喷嘴,分别对水和空气以及豆基蛋白胶和空气在喷嘴内部的流动情况进行了数值模拟研究。结果表明:豆基蛋白胶是非牛顿流体中的一种假... 详细信息

根据豆基蛋白胶的流动特性,确定了其本构方程,为数值模拟研究提供了相关的参数;选择设计了一种气泡雾化喷嘴,分别对水和空气以及豆基蛋白胶和空气在喷嘴内部的流动情况进行了数值模拟研究。结果表明:豆基蛋白胶是非牛顿流体中的一种假塑性流体,它在气泡雾化喷嘴中的流动符合幂律模型;这种假塑性流体能和水一样与空气在气泡雾化喷嘴内部进行很好地混合,其压力图、速度矢量图、组分体积分数图符合流体力学的运动规律,这为具有高黏度特性的豆基蛋白胶进行雾化实验提供了理论依据。

关键词：豆基蛋白胶本构方程气泡雾化喷嘴数值模拟

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Localization Algorithm of Indoor Wi-Fi Access Points Based on Signal Strength Relative Relationship and Region Division

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Computers, Materials & Continua 2018年第4期55卷 71-93页

作者： Wenyan Liu Xiangyang Luo Yimin Liu Jianqiang Liu Minghao Liu Yun q.shi State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou 450001China School of Electronics and Communication Engineering Zhengzhou University of AeronauticsZhengzhou 450001China New Jersey Institute of Technology NJUSA

Precise localization techniques for indoor Wi-Fi access points(APs)have important application in the security ***,due to the interference of environment factors such as multipath propagation and NLOS(Non-Line-of-Sight),the existing methods for localization indoor Wi-Fi access points based on RSS ranging tend to have lower accuracy as the RSS(Received Signal Strength)is difficult to accurately ***,the localization algorithm of indoor Wi-Fi access points based on the signal strength relative relationship and region division is proposed in this *** algorithm hierarchically divide the room where the target Wi-Fi AP is located,on the region division line,a modified signal collection device is used to measure RSS in two directions of each reference *** RSS values are compared and the region where the RSS value has the relative largest signal strength is located as next candidate *** location coordinate of the target Wi-Fi AP is obtained when the localization region of the target Wi-Fi AP is successively approximated until the candidate region is smaller than the accuracy *** are 360 experiments carried out in this paper with 8 types of Wi-Fi APs including fixed APs and portable *** experimental results show that the average localization error of the proposed localization algorithm is 0.30 meters,and the minimum localization error is 0.16 meters,which is significantly higher than the localization accuracy of the existing typical indoor Wi-Fi access point localization methods.

关键词： Wi-Fi access points indoor localization RSS signal strength relative relationship region division.

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Tuning the morphologies of SiC nanowires via the change of the Co_xSi_y melts

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Nano-Micro Letters 2010年第1期2卷 11-17页

作者： J.J.Chen Y.Pan W.H.Tang q.shi Department of Physics Center for Optoelectronics Materials and Devices Zhejiang Sci-Tech University Department of Materials Science and Engineering Zhejiang University Key Laboratory of Advanced Textile Materials and Manufacturing Technology (Zhejiang Sci-Tech University) Ministry of education

SiC nanowires and SiC/SiO2 core-shell structural nanowires were synthesized via a simple thermal evaporation of CoxSiy melts at the temperature of 1500?C. The morphologies and yields of those SiC nanowires can be tuned by altering the composition of CoxSiy. Nanowires obtained by thermal evaporation of Co Si are composed of SiC/SiO2 core-shell nanostructures with lengths up to several hundreds of micrometers, diameters of 4050 nm, and the thickness of amorphous SiO2 wrapping shell about 20 nm. SiC nanowires prepared by thermal evaporation of Co Si2 and Co2 Si melt are found to be hexagonal-prism-shaped nanorods, and the diameter of those nanorods is about 150 nm and the length is about 10 microns. All the SiC nanowires obtained possess [111] preferred growth direction with a high density stacking faults and twin defects. Taking into consideration the binary alloy diagram of Co Si and the participation of oxygen, we propose the vapor-solid growth mechanism of SiC nanowires and discuss the effect of the supersaturation of Si O on the morphology and yields of SiC nanowires.

关键词： Silicon carbide Nanowires Morphology

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Pulsed Microfluid Force-Based On-Chip Modular Fabrication for Liver Lobule-Like 3D Cellular Models

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Cyborg and Bionic Systems 2021年第1期2021卷 222-233页

作者： J.Cui H.P.Wang q.shi T.Sun Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China Intelligent Robotics Institute School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Advanced Innovation Center for Intelligent Robots and Systems Beijing Institute of TechnologyBeijing 100081China Key Laboratory of Biomimetic Robots and Systems(Beijing Institute of Technology) Ministry of EducationBeijing 100081China

In vitro three-dimensional(3D)cellular models with native tissue-like architectures and functions have potential as alternatives to human tissues in regenerative medicine and drug ***,it is difficult to replicate liver constructs that mimic in vivo microenvironments using current approaches in tissue engineering because of the vessel-embedded 3D structure and complex cell distribution of the *** paper reports a pulsed microflow-based on-chip 3D assembly method to construct 3D liver lobule-like models that replicate the spatial structure and functions of the liver *** heterogeneous cell-laden assembly units with hierarchical cell distribution are fabricated through multistep photopatterning of different cell-laden *** fluid force interaction by pulsed microflow,the hierarchical assembly units are driven to a stack,layer by layer,and thus spatially assemble into 3D cellular models in the closed liquid chamber of the assembly *** 3D models with liver lobule-like hexagonal morphology and radial cell distribution allow the dynamic perfusion culture to maintain high cell viability and functional expression during long-term culture in *** results demonstrate that the fabricated 3D liver lobule-like models are promising for drug testing and the study of individual diagnoses and treatments.

关键词： culture maintain spatially

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Experimental analysis on strength and failure modes of wood beam-column connections

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Frontiers of Structural and Civil Engineering 2014年第3期8卷 260-269页

作者： Zhenhua HUANG sheldon q.shi Liping CAI Deportment of Engineering Technology University of North Texas Denton TX 76210 USA

This research experimentally examined the strength, failure modes, and behaviors of dowel-bearing and fiber-bearing wood beam-column connections and explored the effects of cyclic loading on the strength, failure modes, and behaviors of those connections. Base on limited numbers of exploratory laboratory tests （6 preliminary tests in total）, the authors observed that the typical bolted connection （dowel-bearing type wood beam-column connection with fiber- bearing surfaces） showed good behavior （large peak moment） under the monotonic loads, and the tenon joint connection （fiber-bearing wood beam-column connection） showed good behavior under cyclic loads. The cyclic property of loading reduced the strength of the dowel-bearing type wood beam-column connections, but increased the strength of fiber- bearing type wood beam-column connections. More importantly, the authors identified a possible location of safety concern in current national design specifications （NDS） standards for the typical bolted connection （dowel-bearing connection with fiber bearing surface） under cyclic loading because the tested value was smaller than the NDS calculated value. But, because of the small amount of tests conducted, no final conclusion can be drawn based on those preliminary observations yet. A large number of repetitive laboratory tests should be conducted.

关键词： wood connection dowel-beating fiber-bearing

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快速重同步的有意义音频水印盲检测算法

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计算机研究与发展 2003年第2期40卷 215-220页

作者：王泳黄继武 Yun q.shi 中山大学电子与通信工程系广州510275 新泽西理工学院电机工程系

同步是音频水印需要解决的关键问题之一目前的音频水印算法缺乏有效的同步技术应用通信网同步方法 ,提出了一种快速重同步音频有意义水印盲检测算法算法的特点如下 :①利用时域水印技术嵌入同步信息以对抗音频在时间轴上可能受到的... 详细信息

同步是音频水印需要解决的关键问题之一目前的音频水印算法缺乏有效的同步技术应用通信网同步方法 ,提出了一种快速重同步音频有意义水印盲检测算法算法的特点如下 :①利用时域水印技术嵌入同步信息以对抗音频在时间轴上可能受到的攻击 ,如裁剪、网络传输中的丢包等 ;②基于数字通信中的帧同步技术 ,实现了音频信号的快速重同步 ;③在保证不可感知性和稳健性的良好平衡下实现了水印的盲检测 ;④应用BCH编码来降低水印的检测错误率实验结果表明 ,隐藏的水印在对抗噪声、MP3编码和剪裁的稳健性上都达到了较好的性能。

关键词：快速重同步音频水印盲检测算法数字水印 DCT 稳健性图像水印算法语音信号处理音频信号

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