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LY12CZ铝合金在强电场中的超塑性变形

塑性工程学报 1996年第3期3卷 41-46页

作者：李淼泉吴诗西北工业大学四○二教研室

本文研究了未经预处理ＬＹ１２ＣＺ铝合金在强电场中超塑性变形时应变速率敏感性指数、板料厚向异性指数、激活能、极限延伸率的变化和超塑性单向拉伸时的流变应力特征。同时，研究了未经预处理ＬＹ１２ＣＺ铝合金在强电场中超塑性变形... 详细信息

本文研究了未经预处理ＬＹ１２ＣＺ铝合金在强电场中超塑性变形时应变速率敏感性指数、板料厚向异性指数、激活能、极限延伸率的变化和超塑性单向拉伸时的流变应力特征。同时，研究了未经预处理ＬＹ１２ＣＺ铝合金在强电场中超塑性变形后材料的弹性模型、屈服强度、强度极限和断裂时的断面缩减率的变化。并将超塑性拉伸研究结果应用于未经预处理ＬＹ１２ＣＺ铝合金在强电场中的超塑性自由胀形，制作出了自由胀形零件，测量了相对极限胀形高度和零件相对厚度分布的变化。

关键词：铝合金电场超塑性变形

Surface Nitridation of Molybdenum by Laser-promoted Reaction

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Chinese Journal of Lasers 1997年第2期B6卷 161-168页

作者： wu Jiada wu Changzheng ZHONG Xiaoxia SONG Zhoumo li Fuming(Department of Physics, Fundan university, Shanghai 200433)(Deprtment of Applied Physics, northwestern polytechnical university, Xi'an 710072, China) Fudan Univ Shanghai China

Experimental results are reported about the surface nitridation of molyly denum by repeated pulsed laser irradiation on molyboenum foils in pure nitrogen atmosphere. In this laser treatment, the laser irradiation activates nitrogen and melts Mo surface, initating a nitridation reaction in liquid phase. The obtained nitride layers were analyzed and characterized by scanning electron micrography, Auger electron spectroscopy and X -ray diffraction. It is found that the nitride layers contain γ-Mo2N phase and have microstructure much denser than that of the original material. Surface heating and melting and transicnt shock waves induced by laser pulses could account for the microstructure densification of the nitride layers.

关键词： laser-promoted reaction laser heating and melting surface nitridation

A TRACTION CALCULATING FORMULA BASED ON NON-NEWTONIAN RHEOLOGICAL MODEL

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Chinese Journal of Aeronautics 1994年第1期7卷 60-66页

作者： Chen Guoding li Jianhua Wang Buying wu liyan(Faculty of Mechanics,northwestern polytechnical university,Hi’an,China,710072)

Abstract The traction characteristics of synthetic lubricants in rolling/sliding contacts arestudied in detail in the present paper by using thermal partial elastohydrodynamicIubrication theory and the Ree-Eyring rheological model which accounts for thenon Newtonian behavior of the lubricant. Tbe variety regularities of the tractioncoefficient of synthetic lubricants with the load, rolling speed and lubricant vtscosity arcobtained,and a comparison between the calculated results presented in the paper and tbeexperimental results of Gupta et al is also *** addition,a working formula,whichfits the traction coefficient of syntbetic lubricant versus slide-roll ratio curve,has alsobeen devised.

关键词：

Defects‑Rich Heterostructures Trigger Strong Polarization Coupling in Sulfides/Carbon Composites with Robust Electromagnetic Wave Absorption

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Nano-Micro Letters 2025年第1期17卷 528-547页

作者： Jiaolong liu Siyu Zhang Dan Qu Xuejiao Zhou Moxuan Yin Chenxuan Wang Xuelin Zhang Sichen li Peijun Zhang Yuqi Zhou Kai Tao Mengyang li Bing Wei Hongjing wu Mengyang li Bing Wei Hongjing wu School of Physics Xidian UniversityXi’an 710071People’s Republic of China School of Advanced Materials and Nanotechnology State Key Discipline Laboratory of Wide Band Gap Semiconductor TechnologyXidian UniversityXi’an 710071People’s Republic of China School of Microelectronics Xidian UniversityXi’an 710071People’s Republic of China School of Telecommunication Engineering Xidian UniversityXi’an 710071People’s Republic of China MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary School of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi’an 710072People’s Republic of China The Ministry of Education Key Laboratory of Micro and Nano Systems forAerospace School of Mechanical EngineeringNorthwestern PolytechnicalUniversityXi’an 710072People’s Republic of China

Defects-rich heterointerfaces integrated with adjustable crystalline phases and atom vacancies,as well as veiled dielectric-responsive character,are instrumental in electromagnetic *** methods,however,constrain their delicate ***,an innovative alternative is proposed:carrageenan-assistant cations-regulated(CACR)strategy,which induces a series of sulfides nanoparticles rooted in situ on the surface of carbon *** unique configuration originates from strategic vacancy formation energy of sulfides and strong sulfides-carbon support interaction,benefiting the delicate construction of defects-rich heterostructures in M_(x)S_(y)/carbon composites(M-CAs).Impressively,these generated sulfur vacancies are firstly found to strengthen electron accumulation/consumption ability at heterointerfaces and,simultaneously,induct local asymmetry of electronic structure to evoke large dipole moment,ultimately leading to polarization coupling,i.e.,defect-type interfacial ***“Janus effect”(Janus effect means versatility,as in the Greek two-headed Janus)of interfacial sulfur vacancies is intuitively confirmed by both theoretical and experimental investigations for the first ***,the sulfur vacancies-rich heterostructured Co/Ni-CAs displays broad absorption bandwidth of 6.76 GHz at only 1.8 mm,compared to sulfur vacancies-free CAs without any dielectric *** defects-rich heterostructures,this one-pot CACR strategy may steer the design and development of advanced nanomaterials,boosting functionality across diverse application domains beyond electromagnetic response.

关键词： Defects-rich heterointerfaces Sulfides Polarization coupling Electromagnetic wave absorption

DESIGN AND IMPLEMENTATION OF AN INFRARED SCENE TARGET SIMULATOR

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Chinese Journal of Aeronautics 1997年第1期10卷 46-50页

作者： Tang Shuo Sun li(College of Astronautics, northwestern polytechnical university, Xi’an, China, 710072)wu Yonggang wu Genshui(Eletric-Optical Research Center of MAS, Luoyang, Henan, China, 471009) College of Astronautics NW Polytechnical University Xi'an 710072 China Elec.-Optical Research Center of MAS Luoyang Henan 471009 China

A general review is presented of the development of infrared scene targetsimulators; special characters and advantages of scene simulators based on computer-MOSresistor array are discussed by comparing with scaled model simulators; the system principle, structure, key technologies, software and hardware implementation are described.

关键词： infrared imagery target simulators resistors

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燃烧室三维湍流的数字模拟

推进技术 1992年第4期13卷 1-8页

作者：毛根旺李进贤吴心平西北工业大学

文中以SIMPLE方法为基础,采用k-ε两方程湍流模型,发展了一种模拟燃烧室内三维湍流内流场的数值计算方法和计算程序。通过对四种冷流状态进行数字模拟,初步结果表明,理论计算与已有实验结果一致性良好。

关键词：燃烧室流场模拟紊流数值解

Research of Combination Rule Based on Evidence Distance and Local Conflict Distribution

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Research of Combination Rule Based on Evidence Distance and ...

THE INFLUENCE OF CAVITY DAMAGE ON MECHANICAL PROPERTIES OF SUPERPLASTICALLY-DEFORMED MATERIALS AND ITS PREDICTION

2010 Chinese Control and Decision Conference

作者： Jun-wei li,Yong-mei Cheng,Shao-wu Zhang,Yan liang School of Automation,northwestern polytechnical university,Xi''an,710072

＜正＞Dempster-Shafer Theory（DST） is an effective method for dealing with multi-sensor ***, the results may be contrary to intuition when dealing with the highly conflicting *** order to efficiently overcome the shortcomings of DST,a new improved DST combination rule based on evidence distance and local conflict distribution strategy is ***,the mutual support degree of every evidence is obtained by the evidence distance,and normalize the support degree to the relative credibility of the evidence;the generate reason of local conflict is analyzed,the conflicting information is only distributed to those focal elements which contribute to the *** through calculating local conflict,and the distributed value depends on the credibility and similarity degree of the focal elements between the *** results of numerical examples prove that the new combination rule enhances the reliability and rationality of the evidence combination results,and effectively solves the combination of highly conflicting evidence.

关键词： Dempster’s Rule Evidence Distance Local Conflict Information Fusion Weight Coefficient

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Acta Metallurgica Sinica(English Letters) 2000年第2期13卷 481-485页

作者： M. B. liu, Z. C. Zhao,H. Gao,M. Q. li and S. C. wu College of Materials Science and Engineering, northwestern polytechnical university, Xi’an 710072, China

Aluminium alloy LY12CZ sheet without any pre-treatment has been used to study the influence of cavity damage on the mechanical properties of the superplastically-deformed materials room temper- ature. The experimental results show that: (1) the lower the rate of cavitation as the superplastic strain increases, the higher the superplasticity is; (2) the mechanical properties of superplastically- deformed materials at room temperature decrease as the superplastically-deformed strain increases, especially, a noteworthy decrease in elasticity modulus, yield strenth and ultimate strength at room temperature begins to appear as the level of cavitation by area comes up to about 4%, while at the same level the reduction in area drops down a very large quantity. Then, a three-layer back- propagation neural network has been developed to predict the machanichl properties of the superplasti- cally-deformed *** results acquired from the neural network are very inspiring

关键词： superplasticity cavity,mechanical property artificial neural network

Advanced Functional Electromagnetic Shielding Materials:A Review Based on Micro‑Nano Structure Interface Control of Biomass Cell Walls

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Nano-Micro Letters 2025年第1期17卷 98-134页

作者： Yang Shi Mingjun wu Shengbo Ge Jianzhang li Anoud Saud Alshammari Jing Luo Mohammed A.Amin Hua Qiu Jinxuan Jiang Yazeed M.Asiri Runzhou Huang Hua Hou Zeinhom M.El‑Bahy Zhanhu Guo Chong Jia Kaimeng Xu Xiangmeng Chen Co‑Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037People’s Republic of China State Key Laboratory of Efficient Production of Forest Resourced Beijing Forestry UniversityQinghua East Road 35Haidian DistrictBeijing 100083People’s Republic of China Department of Physics Faculty of Sciences‑ArarNorthern Border UniversityArar 91431Saudi Arabia Department of Chemistry College of ScienceTaif UniversityP.O.Box 1109921944 TaifSaudi Arabia Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’anShaanxi 710072People’s Republic of China Integrated Composites Lab Department of Mechanical and Construction EngineeringNorthumbria UniversityNewcastle Upon Tyne NE18STUK College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024People’s Republic of China Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr CityCairo 11884Egypt Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products International Joint Research Center for Biomass MaterialsSouthwest Forestry UniversityKunming 650224People’s Republic of China School of Science Henan Agricultural UniversityZhengzhou 450002People’s Republic of China

Research efforts on electromagnetic interference(EMI)shielding materials have begun to converge on green and sustainable biomass *** materials offer numerous advantages such as being lightweight,porous,and *** to their porous nature,interfacial compatibility,and electrical conductivity,biomass materials hold significant potential as EMI shielding *** concerted efforts on the EMI shielding of biomass materials have been reported,this research area is still relatively new compared to traditional EMI shielding *** particular,a more comprehensive study and summary of the factors influencing biomass EMI shielding materials including the pore structure adjustment,preparation process,and micro-control would be *** preparation methods and characteristics of wood,bamboo,cellulose and lignin in EMI shielding field are critically discussed in this paper,and similar biomass EMI materials are summarized and *** composite methods and fillers of various biomass materials were *** paper also highlights the mechanism of EMI shielding as well as existing prospects and challenges for development trends in this field.

关键词： Biomass materials Electromagnetic interference shielding Micro-nano structure interface control Conductivity