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Laser direct writing of flexible multifunctional airflow sensors on the Kevlar fabric

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Nano Research 2025年第1期18卷 443-454页

作者： wei wang Zi-qing Chen Yong-Qi Li Yu-Long wang Mei-Chen Liu Yun-Bo Ruan Yang Zhang Shu-Juan Liu Qiang Zhao College of Electronic and Optical Engineering and College of Flexible Electronics(Future Technology) Nanjing University of Posts and TelecommunicationsNanjing 210023China State Key Laboratory of Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts and TelecommunicationsNanjing 210023China Zhe Jiang Topsun Logistic Control CO. LTD.Yuhuan 317600China Department of Rehabilitation Medicine School of Acupuncture-Moxibustion and Tuina and School of Health Preservation and RehabilitationNanjing University of Chinese MedicineNanjing 210023China

The growing interest in flexible devices has emerged as a global trend due to their advantages in flexibility,lightweight structure,and wearability,addressing the limitations of traditional *** wearable airflow sensors have been previously reported,the development of flexible fabric-based airflow sensors capable of functioning in environments with open flames—critical for fire rescue operations—has yet to be explored,largely due to the poor fire resistance of conventional *** this work,we first present a flexible,wearable,and multifunctional airflow sensor with excellent fire-resistant properties,fabricated through a simple direct laser writing *** sensor maintains airflow detection capabilities even in the presence of open ***,the fabrication of fabric-based sensors involves complex procedures such as carbon materials doping or vapor-phase deposition,leading to lengthy preparation cycles and high ***,fabric-based devices are inherently prone to *** address these challenges,we introduce twice-vertical laser-induced graphene(TVLIG)as a sensitive and reliable component for fire-resistant airflow *** resulting TVLIG/Kevlar fabric can be integrated into various garments,particularly protective suits,to form sensitive and fire-resistant airflow sensors capable of detecting airflow velocity and direction in both two-dimensional(2D)and three-dimensional(3D)spaces during fire ***,the TVLIG patterns can be expanded to multifunctional platforms,such as glucose detection for injured individuals,offering further applications in rescue *** functional expansion reduces the burden on rescue personnel and streamlines device *** its outstanding sensing capabilities,fire resistance,and expandability,the developed flexible airflow sensor shows great potential for various real-world rescue scenarios,promising advancements in wearable sensing technology for rescue enginee

关键词： flexible airflow sensor direct laser writing twice-vertical laser-induced graphene fire accident rescue Kevlar fabric

Damage analysis of POZD coated square reinforced concrete slab under contact blast

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Defence Technology（防务技术） 2022年第9期18卷 1715-1726页

作者： wei wang qing Huo Jian-chao Yang Jian-hui wang Xing wang wei-liang Gao Key Laboratory of Impact and Safety Engineering (Ningbo University)Ministry of EducationNingbo315211ZhejiangChina Institute of Defence Engineering AMS PLALuoyang 471023China Institute of Advanced Energy Storage Technology and Equipment Ningbo UniversityNingbo315211ZhejiangChina

High efficiency, environmental protection and sustainability have become the main theme of the development of the protection engineering, requiring that the components not only meet the basic functions, but also have chemical properties such as acid and alkali corrosion resistance and aging resistance. Polyisocyanate-oxazodone(POZD) polymer has the above characteristics, it also has the advantages of strong toughness, high strength and high elongation. The concrete slab sprayed with POZD material has excellent anti-blast performance. In order to explore the damage characteristics of POZD sprayed concrete slabs under the action of contact explosion thoroughly, the contact explosion test of POZD concrete slabs with different charges were carried out. On the basis of experimental verification,numerical simulation were used to study the influence of the thickness of the POZD on the blast resistance of the concrete slab. According to the test and numerical simulation results that as the thickness of the coating increases, the anti-blast performance of the concrete slab gradually increases,and the TNT equivalent required for critical failure is larger. Based on the above analysis, empirical expressions on normalized crater diameter, the normalized spall diameter and normalized spall diameter are obtained.

关键词： Contact exposion Square reinforced concrete slab POZD coating Numerical simulation

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锆钛转化膜在镁合金车轮上耐腐蚀的研究

现代涂料与涂装 2019年第1期22卷 53-55,58页

作者：王再德马焕明陈广才秦智伟魏庆旺中信戴卡股份有限公司河北秦皇岛066011

为了提高镁合金车轮表面的耐腐蚀性能,研究了锆钛转化膜在镁合金汽车轮毂上腐蚀性能。采用正交试验方法,研究锆钛转化膜工艺影响因素。转化膜处理后进行环氧粉末涂料喷涂,通过附着力、CASS和FILIFORM试验检查涂层性能。通过正交试验得... 详细信息

为了提高镁合金车轮表面的耐腐蚀性能,研究了锆钛转化膜在镁合金汽车轮毂上腐蚀性能。采用正交试验方法,研究锆钛转化膜工艺影响因素。转化膜处理后进行环氧粉末涂料喷涂,通过附着力、CASS和FILIFORM试验检查涂层性能。通过正交试验得出最佳转化膜处理工艺方案为:碱洗50 g/L,酸洗5.5 g/L,无铬钝化液40 g/L,封闭0.1 g/L,锆钛转化膜提高了镁合金轮毂表面涂层的附着力和耐腐蚀性。

关键词：锆钛转化膜镁合金耐蚀性

Hydrothermal Synthesis,Crystal Structure and Magnetic Properties of a Cobalt(II) Coordination Polymer Assembled by 4-Sulfophthalate and 4,4'-Bipyridine

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Chinese Journal of Structural Chemistry 2006年第11期25卷 1369-1374页

作者： wang qing-wei LI Xiu-Mei HAN Jing College of Chemistry. dilin Normal University Siping 136000 China Department of Chemistry. Tonghua Teachers College Tonghua 134002 China College of Chemistry Jilin University Changchun 130023 China

A novel metal-organic coordination polymer {[Co2（4-sphth）2（4,4＇-bpyh（H2O）4]- [Co（4,4＇-bpy）2（H2O）4]}, （4-sphth = 4-sulfophthalic acid, 4,4＇-bpy = 4,4＇-bipyridine） 1 has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analyses, IR spectroscopy, and magnetic susceptibility measurements. The complex crystallizes in monoclinic, space group C2/c with a = 18.893（6）, b = 23.080（7）, c = 22.473（7） A, fl = 107.311 （4）°, V = 9356（5） A^3, C76H70Co3N12O22S2, Mr = 1744.35, De = 1.238 g/cm^3,μ（MoKα） = 0.640 mm^-1, F（000） = 3596, Z = 4, the final R = 0.0444 and wR = 0.0846 for 9178 observed reflections （I 〉 2σ（I））. It exhibits a novel three-dimensional supramolecular network formed by hydrogen-bonding and π-π interactions. Variable-temperature magnetic measure shows an overall anti-ferromagnetic behavior for compound 1.

关键词： hydrothermal synthesis supramolecular network magnetic properties

Reconstruction of symmetric models composed of analytic curves and surfaces from point cloud

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第10期9卷 1351-1362页

作者： qing wang wei-dong ZHU Ying-lin KE State Key Lab of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China

This paper presents a method to reconstruct symmetric geometric models from point cloud with inherent symmetric structure. Symmetry types commonly found in engineering parts, i.e., translational, reflectional and rotational symmetries are considered. The reconstruction problem is formulated as a constrained optimization, where the objective function is the sum of squared distances of points to the model, and constraints are enforced to keep geometric relationships in the model. First, the explicit representations of symmetric models are presented. Then, by using the concept of parameterized points (where the coor-dinate components are represented as functions rather than constants), the distances of points to symmetric models are deduced. With these distance functions, symmetry information, for both 2D and 3D models, is uniformly represented in the process of reconstruction. The constrained optimization problem is solved by a standard nonlinear optimization method. Owing to the explicit representation of symmetry information, the computational complexity of our method is reduced greatly. Finally, examples are given to demonstrate the application of the proposed method.

关键词： Reverse engineering Model reconstruction Constrained optimization Symmetry

Forging-microstructure-tensile properties correlation in a new nearβhigh-strength titanium alloy

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Rare Metals 2021年第8期40卷 2109-2117页

作者： Huan wang She-wei Xin Yong-qing Zhao wei Zhou wei-Dong Zeng State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an710072China Titanium Alloy Research Institute Northwest Institute for Nonferrous Metal ResearchXi’an710016China

Microstructures and tensile properties of a newβhigh-strength titanium alloy Ti-5321(Ti-5 Al-3 Mo-3 V-2 Zr-2 Cr-1 Nb-1 Fe)were investigated in this *** microstructures,including equiaxed microstructure(EM),bimodal microstructure(BM),basket-weave microstructure(WM)and lamellar microstructure(LM),were tailored by changing the forging process,and the influences of different microstructures on tensile properties were also *** results indicated that Ti-5321 exhibits a better combination of strength and ductility,compared to Ti-5553,Ti-1023,BT22 and *** ultimate tensile strength,total elongation and reduction in area could be achieved in a range of 1200-1300 MPa,10%-15%and40%-60%,*** influences of variant selection on the tensile properties in Ti-5321 alloy were also ***βforging and solution treatment,αphase maintained strictly Burgers orientation relation with adjacentβ*** features of the fractography in BM and LM were also explored to further explain the tensile properties and the fracture mode of Ti-5321 alloy.

关键词： New nearβtitanium alloy Forging process Variant selection Tensile properties

Experimental investigation of ultra-early-strength cement-based selfcompacting high strength concrete slabs(URCS)under contact explosions

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Defence Technology（防务技术） 2023年第6期24卷 326-339页

作者： wei wang qing Huo Jian-chao Yang Jian-hui wang Xing wang Key Laboratory of Impact and Safety Engineering Ningbo UniversityMinistry of EducationNingbo315211ZhejiangChina Institute of Defence Engineering AMS PLALuoyang471023China Institute of Advanced Energy Storage Technology and Equipment Ningbo UniversityNingbo315211ZhejiangChina

In this paper,UR50 ultra-early-strength cement-based self-compacting high-strength concrete slabs(URCS)have been subjected to contact explosion tests with different TNT charge quality,aiming to evaluate the anti-explosive performance of *** the experiment,three kinds of ultra-early-strength cement-based reinforced concrete slabs with different reinforcement ratios and a normal concrete slab(NRCS)were used as the control specimen,the curing time of URCS is 28 days and 24 h *** research results show that URCS has a stronger anti-explosion ability than *** failure mode of URCS under contact explosion is that the front of the reinforced concrete slab explodes into a crater,and the back is *** the increase of the charge,the failure mode of the reinforced concrete slab gradually changed to explosive penetration and explosive *** experiment results also show that the reinforcement ratio of URCS has little effect on the anti-blast performance,and URCS can reach its anti-blast performance at 28 days after curing for 24 *** this basis,the damage parameters of URCS for different curing durations were quantified,and an empirical formula for predicting the diameter of the crater and spalling was established.

关键词： Ultra-early-strength concrete slabs Blast load Contact blast Blast-resistant performance

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不同甘蔗成分测定及其猴头菇发酵研究

甘蔗糖业 2017年第3期46卷 45-49页

作者：张伟伟黄清铧王庆福陈瑞荣李锦荣梁磊广东省生物工程研究所(广州甘蔗糖业研究所)广东省甘蔗改良与生物炼制重点实验室广东广州510316 广东省生物质高值化利用工程实验室广东广州510316

对6个不同的甘蔗汁进行成分测定,并研究不同甘蔗汁对猴头菇的发酵特性。结果发现,粤选1号蔗糖、维生素E和氨基酸总量最高,黑皮果蔗的果糖、铁元素和锌元素含量最高;粤选1号最适合猴头菇发酵。

关键词：成分分析甘蔗汁猴头菇

Recent progress on the jetting of single deformed cavitation bubbles near boundaries

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Journal of Hydrodynamics 2023年第5期35卷 832-857页

作者： Jing-zhu wang Guang-hang wang qing-yun Zeng Yi-wei wang Key Laboratory for Mechanics in Fluid Solid Coupling Systems Institute of MechanicsChinese Academy of SciencesBeijing100190China School of Engineering Science University of the Chinese Academy of SciencesBeijing100049China School of Future Technology University of the Chinese Academy of SciencesBeijing100049China College of Shipbuilding Engineering Harbin Engineering UniversityHarbin150001China Nanhai Institute of Harbin Engineering University Sanya572024China Guangdong Aerospace Research Academy Guangzhou511458China

Cavitation occurs widely in nature and engineering and is a complex problem with multiscale features in both time and space due to its associating violent oscillations. To understand the important but complicated phenomena and fluid mechanics behind cavitation, a great deal of effort has been invested in investigating the collapse of a single bubble near different boundaries. This review aims to cover recent developments in the collapse of single bubbles in the vicinity of complex boundaries, including single boundaries and two parallel boundaries, and open questions for future research are discussed. Microjets are the most prominent features of the non-spherical collapse of cavitation bubbles near boundaries and are directed toward rigid walls and away from free surfaces. Such a bubble generally splits, resulting in the formation of two axial jets directed opposite to each other under the constraints of an elastic boundary or two parallel boundaries. The liquid jet penetrates the bubble, impacts the boundary, and exerts a great deal of stress on any nearby boundary. This phenomenon can cause damage, such as the erosion of blades in hydraulic machinery, the rupture of human blood vessels, and underwater explosions, but can also be exploited for applications, such as needle-free injection, drug and gene delivery, surface cleaning, and printing. Many fascinating developments related to these topics are presented and summarized in this review. Finally, three directions are proposed that seem particularly fruitful for future research on the interaction of cavitation bubbles and boundaries.

关键词： Jetting cavitation bubble near complex boundaries bubble-based technique and their applications