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创业导师对大学生创业能力影响的实证研究

创新与创业教育 2024年第1期15卷 56-64页

作者：汤海滨广州新华学院管理学院广东广州510520

创业导师参与创业项目和指导创业者这两种行为对于提升大学生的内在创业能力和获取外部资源的能力有重要影响。实证研究发现,创业导师参与创业项目对于提高大学生获取外部资源的能力具有显著相关性,但是对于提升大学生的内在创业能力没... 详细信息

创业导师参与创业项目和指导创业者这两种行为对于提升大学生的内在创业能力和获取外部资源的能力有重要影响。实证研究发现,创业导师参与创业项目对于提高大学生获取外部资源的能力具有显著相关性,但是对于提升大学生的内在创业能力没有显著性关系;创业导师指导创业者对提升创业者内在创业能力和获取外部资源的能力都具有显著相关性。在此基础上,从创业导师和创业者的角度分别提出对策建议,即创业导师需要谨慎参与创业项目,与大学生建立更多联接,帮助潜在创业者树立信心,而创业者首先需要提高自身内在创业能力。

关键词：创业导师大学生创业能力

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现实题材影视作品的美育意义探究

文化创新比较研究 2024年第22期8卷 5-8页

作者：汤海滨浙江艺术职业学院浙江杭州311300

影视作品肩负着传承中华优秀传统文化、弘扬新时代不屈精神、助力国家文化经济融合发展的重要职责。现实题材影视作品以其独特的题材魅力,深入社会生活,展现世间百态,弘扬时代精神,着力为国家写史、为民族塑像、为时代明德。随着社会不... 详细信息

影视作品肩负着传承中华优秀传统文化、弘扬新时代不屈精神、助力国家文化经济融合发展的重要职责。现实题材影视作品以其独特的题材魅力,深入社会生活,展现世间百态,弘扬时代精神,着力为国家写史、为民族塑像、为时代明德。随着社会不断发展,人们的价值观逐渐受到多种因素影响,导致文化观念与物质观念被异化。基于此,该文通过运用比较研究法,将现实题材影视作品与历史题材进行对比,通过分析其差异质化出现实题材影视作品的内核及构成要素,同时选取当下热门现实题材影视作品进行内容分析,以案例中的美育意义反映当下社会文化、审美、教育的现状,旨在探究现实题材影视作品的美育意义,优化现实题材影视作品的美育功能。

关键词：现实题材影视作品美育意义比较研究法案例分析法意义探究

电推进粒子网格法模拟中计算加速方法的研究综述

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推进技术 2024年第8期45卷 1-25页

作者：汤海滨潘若剑毛仁凡崔云蔚任军学北京航空航天大学宇航学院北京102206 航天器设计优化与动态模拟技术教育部重点实验室北京102206 空间环境监测与信息处理工业和信息化部重点实验室北京102206 北京航空航天大学空间与环境学院北京102206

粒子网格法(PIC)模拟电推进装置等离子体时具有很强的第一性,但是模拟过程中计算负载很大,故PIC模拟的计算加速方法不可或缺。本文从电推进装置基本性质、低温等离子体物理特性和PIC算法特点作为切入点,明确了PIC方法在电推进装置模拟... 详细信息

粒子网格法(PIC)模拟电推进装置等离子体时具有很强的第一性,但是模拟过程中计算负载很大,故PIC模拟的计算加速方法不可或缺。本文从电推进装置基本性质、低温等离子体物理特性和PIC算法特点作为切入点,明确了PIC方法在电推进装置模拟过程中计算负载高的原因;结合国内外的研究现状,从建模、时空尺度、算法与并行三个层面介绍了对应计算加速方法的原理和效果;对各类计算加速方法进行了总结和展望。

关键词：电推进 PIC模拟计算加速方法并行计算综述

Coupling plasma plume of a low-power magnetically shielded Hall thruster with a hollow cathode

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Chinese Journal of Aeronautics 2020年第12期33卷 3018-3026页

作者： Guangchuan ZHANG Junxue REN Wei LIANG Ning OUYANG Chao LU haibin tang School of Space and Environment Beihang UniversityBeijing 100083China School of Astronautics Beihang UniversityBeijing 100083China Shanghai Institute of Space Propulsion Shanghai 201112China Key Laboratory of Spacecraft Design Optimization&Dynamic Simulation Technologies Ministry of EducationBeijing 100083China Laboratory of Space Environment Monitoring and Information Processing Ministry of Industry and Information TechnologyBeijing 100083China

The coupling region of a Hall thruster with a hollow cathode is the region between the cathode and the thruster *** characteristics of plasma in that region are complicated and strongly associated with the thruster working conditions and the cathode *** this paper,a laboratory 100 W class magnetically shielded Hall thruster was coupled with a hollow *** imaging and electrostatic probe were employed to monitor and scan the plasma *** characteristics in the coupling region in non-self-sustained mode and self-sustained mode were *** of the coupling plume with the cathode position was *** show that,when turning the thruster into self-sustained mode or moving the cathode further away axially,the discharge current can be reduced by 6.4–10.6%restraining the electron current and improving *** particular,when the cathode is moved further,the electron conduction near the channel walls is *** electron current is reduced by 27.4%and the ion beam current is increased by 7%.Overall,this work shows that the working mode of the thruster and the position of the cathode greatly affect the coupling plasma *** play an important role in improving the utilizations of propellant and current.

关键词： Coupling region Electron conduction Hall thruster Hollow cathode Utilizations of propellant and current

Origin of strong and narrow localized surface plasmon resonance of copper nanocubes

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Nano Research 2019年第1期12卷 63-68页

作者： Peng Zheng haibin tang Botong Liu Sujan Kasani Ling Huang Nianqiang Wu Departm ent of Mechanical and Aerospace Engineering West Virginia UniversityMorgantownWest Virginia 26506-6106USA Institute of Advanced Materials Nanjing Tech UniversityNanjing 211816China Lane Department of Computer Science and Electrical Engineering West Virginia UniversityMorgantownWest Virginia 26506USA

Inexpe nsive copper nano particles are generally thought to possess weak and broad localized surface plasm on resonance(LSPR).The,present experimental and theoretical studies show that tailoring the Cu nanoparticle to a cubic shape results in a single intense,narrow,and asymmetric LSPR line shape,which is even superior to round-shaped gold *** this study,the dielectric function of copper is decomposed into an interband transition component and a free-electron *** allows interband transition-induced plasmon damping to be visualized both spectrally and by surface polarization *** results reveal that the LSPR of Cu nanocubes originates from the comer mode as it is spectrally separated from the interb and *** additi on,the interband tran sitions lead to severe damping of the local electromagnetic field but the cubic corner LSPR mode *** nanocubes display an extinction coefficient comparable to the dipole mode of a gold nanosphere with the same volume and show a larger local electromagnetic field enhancement These results will guider-development of in expensive plasmonic copper-based nano materials.

关键词： copper nanocube localized surface plasmon resonance discrete dipole approximation interband transition

Electron population properties with different energies in a helicon plasma source

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Plasma Science and Technology 2021年第1期23卷 48-55页

作者： Zun ZHANG Zhe ZHANG haibin tang Jiting OUYANG School of Space and Environment Beihang UniversityBeijing 100191People’s Republic of China Key Laboratory of Space Environment Monitoring and Information Processing of MIIT People’s Republic of China Shanghai Institute of Space Propulsion Shanghai Engineering Research Center of Space EngineShanghai 201112People’s Republic of China School of Instrumentation and Optoelectronic Engineering Beihang UniversityBeijing 100191People’s Republic of China School of Physics Beijing Institute of TechnologyBeijing 100081People’s Republic of China

The characteristics of electrons play a dominant role in determining the ionization and acceleration processes of *** with electrostatic diagnostics,the optical method is independent of the radio frequency(RF)noise,magnetic field,and electric *** this paper,an optical emission spectroscope was used to determine the plasma emission spectra,electron excitation energy population distributions(EEEPDs),growth rates of low-energy and highenergy electrons,and their intensity jumps with input *** 56 emission lines with the highest signal-to-noise ratio and their corresponding electron excitation energy were used for the translation of the spectrum into *** discrete EEEPD has two clear different regions,namely the low-energy electron excitation region(neutral lines with threshold energy of13–15 eV)and the high-energy electron excitation region(ionic lines with threshold energy?19 e V).The EEEPD variations with different diameters of discharge tubes(20 mm,40 mm,and 60 mm)and different input RF powers(200–1800 W)were *** normalized intensity comparison of the ionic and neutral lines,the growth rate of the ionic population was higher than the neutral one,especially when the tube diameter was less than 40 mm and the input power was higher than 1000 ***,we found that the intensities of low-energy electrons and high-energy electrons jump at different input powers from inductively coupled(H)mode to helicon(W)mode;therefore,the determination of W mode needs to be carefully considered.

关键词： electric propulsion helicon plasma plasma diagnostics optical emission spectroscope electron excitation energy population distribution

Numerical Simulation of Characteristics of CEX Ions in Ion Thruster Optical System

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Chinese Journal of Aeronautics 2010年第1期23卷 15-21页

作者： Zhong Lingwei Liu Yu Li Juan Gu Zuo Jiang Haocheng Wang Haixing tang haibin School of Astronautics Beifing University of Aeronautics and AstronauticsBeijing 100191 China Lanzhou Institute of Physics Lanzhou 730000 China

Charge exchange （CEX） ions could inflict severe damages on the ion thruster optical system. This article is aimed at investigating the characteristics of the CEX ions and their influences upon the optical system by means of particle-incell（PIC） ion simulation and Monte Carlo collision（MCC） methods. The results from numerical simulation indicate that despite the fact that CEX ions appear in the entire beamlet region near the ion optical system, the ones that present themselves downstream of the accelerator grid have good reason for attracting more attention. As their trajectories are significantly affected by the local electric field, a great number of CEX ions are accelerated toward grids resulting in sputtering erosion. When the influences of the CEX ions are considered in the nulnerical simulation,there could hardly be observed augments in the screen grid current,but the accelerator grid current increases from zero to 1.4% of the beamlet current. It can be understood from the numerical simulation that the CEX ions formed in the region far downstream of the accelerator grid should be blamed for the erosion on the downstream surface of the accelerator grid.

关键词： eleetric propulsion ion propulsion ion optical system particle simulation charge exchange collision

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在役高速公路大跨度斜拉桥荷载试验研究

四川建材 2024年第2期50卷 203-205页

作者：张扬徐冰雷张杰王敏汤海彬江苏宿淮盐高速公路管理有限公司江苏淮安223001 苏交科集团股份有限公司江苏南京210000 长大桥梁安全长寿与健康运维全国重点实验室江苏南京210000

淮安大桥为大跨度双索面斜拉桥,已服役18年,为掌握大桥当前结构状态和受力性能,对大桥进行荷载试验,针对主梁最大正负弯矩、主塔最大弯矩、主梁挠度、塔偏等设计加载工况。结果表明,淮安大桥测试截面的平均应变、挠度及塔顶偏位的校验... 详细信息

淮安大桥为大跨度双索面斜拉桥,已服役18年,为掌握大桥当前结构状态和受力性能,对大桥进行荷载试验,针对主梁最大正负弯矩、主塔最大弯矩、主梁挠度、塔偏等设计加载工况。结果表明,淮安大桥测试截面的平均应变、挠度及塔顶偏位的校验系数均处在合理范围内,相对残余均小于20%,大桥处于弹性工作阶段,受力性能良好,满足设计荷载的正常使用要求。

关键词：桥梁工程大跨度斜拉桥荷载试验承载能力评定

Selective laser melting of dense and crack-free AlCoCrFeNi_(2.1) eutectic high entropy alloy: Synergizing strength and ductility

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Journal of Materials Science & Technology 2022年第22期117卷 133-145页

作者： Lin He Shiwei Wu Anping Dong haibin tang Dafan Du Guoliang Zhu Baode Sun Wentao Yan Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming and State Key Lab of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Department of Mechanical Engineering National University of Singapore117575Singapore School of Intelligent Manufacturing Nanjing University of Science and TechnologyNanjing 210094China

Additively manufactured high-entropy alloys generally suffer from low strength and/or poor *** this work,by leveraging the good castability of eutectic high entropy alloys and high cooling rate of selective laser melting(SLM),we report a nearly fully dense and crack-free as-SLM AlCoCrFeNi_(2.1) eutectic high entropy alloy with an exceptional strength-ductility synergy,showing an ultrahigh yield strength of 982.1±35.2 MPa and an ultimate tensile strength of 1322.8±54.9 MPa together with an elongation to fracture of 12.3±0.5%.Such strength-ductility enhancement is owing to the heterogeneous eutectic microstructure consisting of the columnar,equiaxed,and“L-shape”cells with much refined sizes down to *** morphology of cells in the transition zone is related to the misorientation between the growth direction of adjacent *** heterogeneous eutectic microstructure is the result of the graingrowth behavior dominated by the mechanisms of the epitaxial growth and growth of heterogeneous nuclei in *** current results provide a new methodology for the future design of ultrahigh-strength and ductile SLM-fabricated metallic materials including HEAs,and other printable alloys for various structural applications.

关键词： Additive manufacturing High entropy alloy Microstructure Mechanical properties Laser Crack-free