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某乘用车加速工况车内轰鸣声诊断分析及控制方法

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应用声学 2024年第1期43卷 90-94页

作者：蒋邹梁莹吴文栋罗玉军柳州铠玥科技有限公司柳州545006 上汽通用五菱汽车股份有限公司柳州545006 广西科技大学柳州545006

该文针对某乘用车加速工况出现的轰鸣声进行诊断分析与控制。首先通过主观评价确定问题工况,通过实车测试发现2400 r/min左右车内存在明显轰鸣声。利用阶次分析、模态分析及错频验证可知,发动机激励经悬置传递副车架,引起副车架的共振,... 详细信息

该文针对某乘用车加速工况出现的轰鸣声进行诊断分析与控制。首先通过主观评价确定问题工况,通过实车测试发现2400 r/min左右车内存在明显轰鸣声。利用阶次分析、模态分析及错频验证可知,发动机激励经悬置传递副车架,引起副车架的共振,进而传递到车内引起轰鸣声。最后通过传递分析及柔性连接点导纳法,优化副车架橡胶衬套结构。结果表明,优化后在2400 r/min声压总级与2阶声压差值为7.5 dB(A);声压总级较原状态降低2 dB(A),2阶噪声降低7.8 dB(A),声压总级和2阶噪声声压差值增大,轰鸣声明显减小,主观评价可接受。

关键词：轰鸣声模态分析传递路径分析副车架衬套优化

Copper foils with gradient structure in thickness direction and different roughnesses on two surfaces fabricated by double rolling

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International Journal of Minerals,Metallurgy and Materials 2013年第12期20卷 1170-1175页

作者： Xi-yong Wang Xue-feng Liu Wen-jiang zou Jian-xin Xie School of Materials Science and Engineering University of Science and Technology Beijing Beijing Laboratory of Metallic Materials and Processing for Modern Transportation University of Science and Technology Beijing Key Laboratory for Advanced Materials Processing Ministry of Education) University of Science and Technology Beijing

Copper foils with gradient structure in thickness direction and different roughnesses on two surfaces were fabricated by double rolling. The two surface morphologies of double-rolled copper foils are quite different, and the surface roughness values are 61 and 1095 nm, respectively. The roughness value of matt surface can meet the requirement for bonding the resin matrix with copper foils used for flexible printed circuit boards, thus may omit traditional roughening treatment; the microstructure of double-rolled copper foils demonstrates an obviously asymmetric gradient feature. From bright surface to matt surface in thickness direction, the average grain size first increases from 2.3 to 7.4 μm and then decreases to 3.6 μm; compared with conventional rolled copper foils, the double-rolled copper foils exhibit a remarkably increased bending fatigue life, and the increased range is about 16.2%.

关键词： copper foils rolling surfaces gradient structure fatigue of materials

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3D打印技术在麻醉领域的应用现状

医学信息 2024年第1期37卷 179-183页

作者：张宏伟朱易豪邹江四川省肿瘤临床医学研究中心/四川省肿瘤医院·研究所/四川省癌症防治中心/电子科技大学附属肿瘤医院麻醉科

3D打印技术自上世纪问世以来，已在建筑、航空、制造等多个领域得到广泛应用，被视为第四次工业革命的标志。近年来，3D打印技术在医学领域取得了令人瞩目的成果，包括外科术前评估、手术方案制定、肿瘤定位、模拟教学、人工假体、再生... 详细信息

3D打印技术自上世纪问世以来，已在建筑、航空、制造等多个领域得到广泛应用，被视为第四次工业革命的标志。近年来，3D打印技术在医学领域取得了令人瞩目的成果，包括外科术前评估、手术方案制定、肿瘤定位、模拟教学、人工假体、再生医学、基础科研等。近年来，3D打印在麻醉领域的应用发展迅速，取得了长足发展。本文就3D打印技术在麻醉学科模拟教学、临床麻醉、基础科研与公共卫生危机事件中的应用情况作一综述，以期为后续相关研究的开展提供新方向和新思路。

关键词： 3D打印模拟教学临床麻醉

Effect of Ti Addition on Microstructure Evolution and Mechanical Properties of Al_(18)Co_(13)Cr_(10)Fe_(14)Ni_(45) Eutectic High-Entropy Alloys

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金属学报:英文版 2023年第9期36卷 1493-1501页

作者： Jia-Qi Zheng Ming-Liang Wang Wen-Na Jiao Long-jiang zou Yan Di Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian116024China

A series of new(Al_(18)Co_(13)Cr_(10)Fe_(14)Ni_(45))(100−x)Tix(x=0,0.5,1)eutectic high-entropy alloys(EHEAs)were designed and prepared with the aid of empirical parameter calculations and JMatPro software *** effects of Ti addition on the microstructures,phase structures,and mechanical properties of Al_(18)Co_(13)Cr_(10)Fe_(14)Ni_(45) EHEA were *** results show that(Al_(18)Co_(13)Cr_(10)Fe_(14)Ni_(45))_((100−x))Ti_(x)(x=0,0.5,1)EHEAs are composed of the FCC and B2 *** the increase in Ti content,the strength of the EHEAs *** volume fraction of the FCC phase decreases,and the volume fraction of B2 phase increases;the size of nanoprecipitates within the B2 phase decreases and the number of them increases,which could be responsible for the high strength due to the addition of *** them,(Al_(18)Co_(13)Cr_(10)Fe_(14)Ni_(45))99.5Ti0.5 alloy exhibited excellent properties with yield strength,ultimate tensile strength,and ductility of 690 MPa,1065 MPa,and 9.18%,respectively.

关键词： High-entropy alloys Eutectic Microstructure Mechanical properties

Cell Nanomechanics Based on Dielectric Elastomer Actuator Device

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Nano-Micro Letters 2019年第4期11卷 690-708页

作者： Zhichao Li Chao Gao Sisi Fan jiang zou Guoying Gu Mingdong Dong Jie Song Institute of Nano Biomedicine and Engineering Department of Instrument Science and EngineeringSchool of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Shanghai Engineering Research Center of Advanced Dental Technology and Materials Shanghai Ninth People’s HospitalShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Robotics Institute School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Interdisciplinary Nanoscience Center(iNANO) Aarhus UniversityAarhus 8000Denmark

As a frontier of biology,mechanobiology plays an important role in tissue and biomedical *** is a common sense that mechanical cues under extracellular microenvironment affect a lot in regulating the behaviors of cells such as proliferation and gene expression,*** such an interdisciplinary field,engineering methods like the pneumatic and motor-driven devices have been employed for ***,such techniques usually rely on complex structures,which cost much but not so easy to *** elastomer actuators(DEAs)are well known as a kind of soft actuation technology,and their research prospect in biomechanical field is gradually concerned due to their properties just like large deformation(>100%)and fast response(<1 ms).In addition,DEAs are usually optically transparent and can be fabricated into small volume,which make them easy to cooperate with regular microscope to realize real-time dynamic imaging of *** paper first reviews the basic components,principle,and evaluation of DEAs and then overview some corresponding applications of DEAs for cellular mechanobiology *** also provide a comparison between DEA-based bioreactors and current custom-built devices and share some opinions about their potential applications in the future according to widely reported results via other methods.

关键词： Dielectric elastomer actuator Mechanical stimulus Bioreactor Mechanobiology

Joining of C_f/SiC composite to GH783 superalloy with NiPdPtAu-Cr filler alloy and a Mo interlayer

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Journal of Materials Science & Technology 2019年第9期35卷 2099-2106页

作者： Wen-Wen Li Bo Chen Hua-Ping Xiong Wen-jiang zou Hai-Shui Ren Welding and Plastic Forming Division Beijing Institute of Aeronautical Materials

With assistance of Mo interlayer, joining of Cf/SiC composite to GH783 superalloy was carried out using NiPdPtAu-Cr filler alloy. Under the brazing condition of 1200 C for 10 min, the maximum joint strength of 98.5 MPa at room temperature was achieved when the thickness of Mo interlayer was 0.5 mm. Furthermore, the corresponding joint strength tested at 800 ℃ and 900℃ was even elevated to 123.8 MPa and 133.0 MPa, respectively. On one hand, the good high-temperature joint strength was mainly attributed to the formation of the refractory Mo-Ni-Si ternary compound within the joint. On the other hand, the residual Mo interlayer as a hard buffer, can release the residual thermal stresses within the dissimilar joint. The Cf/SiC-Mo bonding interface was still the weak link over the whole joint, and the cracks propagated throughout the whole reaction zone between the Cf/SiC composite and the Mo interlayer.

关键词： Cf/Si Ccomposite GH783 superalloy Microstructure Strength Fracture mechanism

Joining of SiO2f/SiO2 composite to Nb using Ag-Cu-In-Ti brazing alloys

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Journal of Materials Science & Technology 2020年第15期47卷 13-20页

作者： Bo Chen Wen-jiang zou Wen-Wen Li Shi-Biao Wu Hua-Ping Xiong Xin Wu Welding and Plastic Forming Division Beijing Institute of Aeronautical MaterialsBeijing100095China

Three compositions of Ag-Cu-In-Ti system brazing alloys were designed for joining SiO2 f/SiO2 ceramic composite to Nb *** wettability of the three alloys on the composite was studied with the sessile drop *** results showed that after heating at 1073 K for 30 min,they exhibited contact angles of 74°,83° and 86°,*** brazing alloys were fabricated into foils by rapid solidification *** the three brazing filler alloys the joints brazed with AgCu-10 In-5 Ti at 1073 K for 10 min presented the maximum average shear strength of 30.9 *** the brazing process the active element Ti diffused strongly from the filler alloy to the composite surface and a reaction layer with a thickness of 2-3 μm was *** metallurgical bonding was also achieved at the Nb *** interface structure of the joint brazed with the AgCu-10 In-5 Ti alloy can be described as the following sequence:SiO2 f/SiO2→SiO2+Cu3 Ti3 O→SiO2+TiO+Ti5 Si4→Ag(s,s)+(Cu-Ti)→***,for the filler alloy with 4.0 wt% Ti content the joint strength was only 15.8 MPa.

关键词： Joining Composites Strength SiO2

Plant Temperature for Sterile Alteration of a Temperature-Sensitive Genic Male Sterile Rice,Peiai64S

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Agricultural Sciences in China 2007年第11期6卷 1283-1290页

作者： Lǖ Chuan-gen zou jiang-shi HU Ning YAO Ke-min jiangsu Academy of Agricultural Sciences Nanjing 210014 P.R.China Nanjing University of Information Science and Technology Nanjing 210044 P.R. China

The forecast of sterile alteration for the temperature-sensitive genic male sterile （TGMS） line in two-line hybrid rice seed production was traditionally based on screen temperature determined by weather station. The article put forward a new approach based on plant temperature, which was more exact and direct than the traditional method. The result of the simulation of the self-seeded setting rate of a widely used TGMS line, Peiai64S, by several temperature parameters and durations, showed that the fertility was directly affected by the plant temperature at a height of 20 cm or the air temperature around it in three days duration. Using the stem temperature of three days at a height of 20 cm as the simulation parameter, the fertility of Peiai64S had the maximum, minimum and optimum temperatures as 22.8, 21.7 and 22.5℃, respectively, whereas 23.2, 21.5 and 21.8℃ when using the air temperature of three days around the height of 20 cm as the parameter. Such temperature indices can be used to conclude the sterile alteration of TGMS for safeguarding seed production of twoline hybrid rice. The article also established a statistic model to conclude plant temperature by water temperatures at inflow and outflow, and air temperature and cloudage from weather station.

关键词： plant temperature sterile alteration temperature-sensitive genic male sterile rice (TGMS)

Muscle-fiber array inspired, multiple-mode, pneumatic artificial muscles through planar design and one-step rolling fabrication

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National Science Review 2021年第10期8卷 68-78页

作者： jiang zou Miao Feng Ningyuan Ding Peinan Yan Haipeng Xu Dezhi Yang Nicholas X.Fang Guoying Gu Xiangyang Zhu State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong University Department of Mechanical Engineering Massachusetts Institute of Technology Robotics Institute School of Mechanical Engineering Shanghai Jiao Tong University

Advances in development of artificial muscles have enabled creation of soft robots with biological dexterity and self-adaption in unstructured environments; however, production of scalable artificial muscles with multiple-mode actuations remains elusive. Inspired by muscle-fiber arrays in muscular hydrostats, we present a class of versatile artificial muscles called MAIPAMs(muscle-fiber array inspired pneumatic artificial muscles), capable of multiple-mode actuations(such as parallel elongation-bending-spiraling actuations, 10 parallel bending actuations and cascaded elongation-bending-spiraling actuations). Our MAIPAMs consist of active 3 D elastomer-balloon arrays reinforced by a passive elastomer membrane,achieved through a planar design and one-step rolling fabrication approach. We introduce prototypical designs for the MAIPAMs and demonstrate their muscle-mimic structures and versatility, as well as their scalable ability to integrate flexible but non-stretchable layers for contraction and twisting actuation modes and compliant electrodes for self-sensing. We further demonstrate that this class of artificial muscles shows potential for versatile robotic applications, such as carrying a camera for recording videos, gripping or manipulating objects, and climbing a pipe-line.

关键词： soft robotics pneumatic artificial muscles multiple-mode actuations bio-inspired design