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AIAA science and Technology Forum and Exposition, AIAA SciTech Forum 2025

作者： Rashad, Maha El-Badawy, Ayman Hamza, Abdelaziz Faculty of Engineering Mechanical Engineering Department German International University Cairo Egypt Faculty of Engineering and Material Science Mechatronics Engineering Department German University in Cairo Cairo Egypt

ISBN: (数字)9781624107238

ISBN: (纸本)9781624107238

In this paper, the design and application of a feedback-linearization-based controller combined with a robust µ-synthesis for trajectory tracking for the longitudinal dynamics of an aircraft is presented. This approach is compared with a full-state feedback controller to validate this control strategy. The proposed approach aims to enhance the robustness and performance of the system in the presence of various uncertainties and disturbances, including unmodeled nonlinear dynamics and wind disturbances. The feedback linearization technique is used to eliminate model non-linearities to enable linear control methodologies to be effectively applied. Subsequently, a µ-synthesis controller is designed to ensure robust performance and stability under structured uncertainties. The simulation results indicate that the proposed controller effectively ensures the aircraft follows the desired position trajectories, despite the presence of wind disturbances and unmodeled nonlinear dynamics, thus, the control system satisfies the requirements. © 2025, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Feedback linearization

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Linear and Non-Linear Dynamics of Inertial Waves in a Rotating Cylinder with Antiparallel Inclined Ends

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Fluid Dynamics & materials Processing 2024年第4期20卷 787-802页

作者： Mariya Shiryaeva Mariya Subbotina Stanislav Subbotin Laboratory of Vibrational Hydromechanics Perm State Humanitarian Pedagogical UniversityPerm614000Russia The Department for Construction Engineering and Material Science Perm National Research Polytechnic UniversityPerm614990Russia

This work is devoted to the experimental study of inertial wave regimes in a non-uniform rotating cylinder with antiparallel inclined *** this setting,the cross-section of the cylinder is divided into two regions where the fluid depth increases or decreases with *** different regimes are found:inertial wave attractor,global oscillations(the cavity’s resonant modes)and regime of symmetric reflection of wave *** linear wave regimes,a steady single vortex elongated along the rotation axis is *** location of the wave’s interaction with the sloping ends determines the vortex position and the vorticity *** non-linear regimes several pairs of the triadic resonance subharmonics are detected *** instability of triadic resonance is accompanied by the periodic generation of mean vortices drifting in the azimuthal ***,the appearance frequency of the vortices is consistent with the low-frequency subharmonic of the triadic *** experimental results shed light on the mechanisms of the inertial wave interaction with zonal flow and may be useful for the development of new methods of mixing.

关键词： Rotation inertial wave attractor triadic resonance zonal flow instability

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Stress-Regulation Design of Lithium Alloy Electrode toward Stable Battery Cycling

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Energy & Environmental materials 2023年第1期6卷 184-191页

作者： Chunhao Li Shuibin Tu Xin Ai Siwei Gui Zihe Chen Wenyu Wang Xiaoxiao Liu Yuchen Tan Hui Yang Yongming Sun Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Material Processing and Die&Mould Technology Department of MechanicsSchool of Aerospace EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Metallic tin(Sn)foil is a promising candidate anode for lithium-ion batteries(LIBs)due to its metallurgical processability and high ***,it suffers low initial Coulombic efficiency and inferior cycling stability due to its uneven alloying/dealloying reactions,large volume change and stress,and fast electrode structural ***,we report an undulating LiSn electrode fabricated by a scalable two-step procedure involving mechanical lithography and chemical prelithiation of Sn *** the combination of experimental measurements and chemo-mechanical simulations,it was revealed the obtained undulating LiSn/Sn electrode could ensure better mechanical stability due to the pre-swelling state from Sn to Li x Sn and undulating structure of lithography in comparison with plane Sn,homogenize the electrochemical alloying/dealloying reactions due to the activated surface materials,and compensate Li loss during cycling due to the introduction of excess Li from Li_(x)Sn,thus enabling enhanced electrochemical *** cells consisting of undulating LiSn/Sn electrode with an active thickness of∼5 um displayed stable cycling over 1000 h at 1 mA cm^(-2) and 1 mAh cm^(-2) with a low average overpotential of<15 *** paired with commercial LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)(NCM622)cathode with high mass loading of 15.8 mg cm^(-2),the full cell demonstrated a high capacity of 2.4 mAh cm^(-2) and outstanding cycling stability with 84.9% capacity retention at 0.5 C after 100 *** work presents an advanced LiSn electrode with stress-regulation design toward high-performance LIBs,and sheds light on the rational electrode design and processing of other high-capacity lithium alloy anodes.

关键词： chemo-mechanical simulation lithium alloy lithium-ion batteries mechanical lithography stress regulation

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Recent Advances in the Electrochemical Defluorinative Transformations of C-F Bonds

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Chinese Journal of Chemistry 2024年第16期42卷 1913-1928页

作者： Qinhui Wan Rui-Xue Liu Zhongyi Zhang Xia-Die Wu Zhong-Wei Hou Lei Wang Advanced Research Institute and Schoolof Pharmaceutical Sciences Taizhou UniversityJiaojiangZhejiang 318000China Department of Chemistry Southern University of Science and TechnologyhenzhenGuangdong 518055China College of Material Chemistry and Chemical Engineering Key Laboratory of Organosilicon Chemistry and Material Technology Ministryof EducationHangzhou Normal UniversityHangzhouZhejiang 311121China

Organic fluorine compounds are ubiquitous and pivotally important organic molecules,yet their activation and transformation have long been a formidable challenge due to the high energy and low reactivity of C-F *** electrosynthesis,an environmentally benign synthetic method in organic chemistry,enables a myriad of chemical transformations without the need for external redox *** recent years,organic electrochemistry has emerged as a powerful tool for achieving the activation and transformation of C-F bonds in fluorine-containing *** review aims to succinctly recapitulate the latest advancements in the electrochemical defluorinative transformations of C-F bonds and to delve into the reaction design,mechanistic insights,and developmental prospects ofthese methods.

关键词： Organic electrochemistry Electroreduction Defluorination C-F bond activation Organic fluorine compounds

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Wigner function of optical cumulant operator and its dissipation in thermo-entangled state representation

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Chinese Physics B 2024年第6期33卷 205-210页

作者：张科李兰兰范洪义 School of Electronic Engineering Huainan Normal UniversityHuainan 232038China Department of Material Science and Engineering University of Science and Technology of ChinaHefei 230026China

To conveniently calculate the Wigner function of the optical cumulant operator and its dissipation evolution in a thermal environment, in this paper, the thermo-entangled state representation is introduced to derive the general evolution formula of the Wigner function, and its relation to Weyl correspondence is also discussed. The method of integration within the ordered product of operators is essential to our discussion.

关键词： Wigner function optical cumulant operator dissipation evolution thermo-entangled state representation integration within ordered product of operators

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Layer Hall effect induced by hidden Berry curvature in antiferromagnetic insulators

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National science Review 2024年第2期11卷 15-23页

作者： Rui Chen Hai-Peng Sun Mingqiang Gu Chun-Bo Hua Qihang Liu Hai-Zhou Lu X.C.Xie Shenzhen Institute for Quantum Science and Engineering and Department of Physics Southern University of Science and Technology(SUSTech) International Quantum Academy Institute for Theoretical Physics and Astrophysics University of Würzburg School of Electronic and Information Engineering Hubei University of Science and Technology Guangdong Provincial Key Laboratory of Computational Science and Material Design Southern University of Science and Technology Shenzhen Key Laboratory of Quantum Science and Engineering International Center for Quantum Materials School of PhysicsPeking University Collaborative Innovation Center of Quantum Matter CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences

The layer Hall effect describes electrons spontaneously deflected to opposite sides at different layers, which has been experimentally reported in the MnBi2Te4thin films under perpendicular electric fields. Here, we reveal a universal origin of the layer Hall effect in terms of the so-called hidden Berry curvature, as well as material design principles. Hence, it gives rise to zero Berry curvature in momentum space but non-zero layer-locked hidden Berry curvature in real space. We show that, compared to that of a trivial insulator, the layer Hall effect is significantly enhanced in antiferromagnetic topological insulators. Our universal picture provides a paradigm for revealing the hidden physics as a result of the interplay between the global and local symmetries, and can be generalized in various scenarios.

关键词： layerHall effect hidden Berry curvature antiferromagnetic insulator axion insulator, quantum transport

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Quantum Polarization in Two-Mode Generalized Binomial State 10

Quantum Polarization in Two-Mode Generalized Binomial State

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10th International Conference on Signal Processing and Communication, ICSC 2025

作者： Jatwani, Anjali Verma, Amit Jaypee Institute of Information Technology Department of Physics and Material Science and Engineering Noida India

ISBN: (纸本)9798331511890

This study investigates quantum polarization in a two-mode generalized binomial state (TMGBS), a non-classical property of light, using quantum Stokes parameters and crucial in terms of its relationship to the purity and coherence of quantum states. Here we explore the criterion of quantum polarization in a generalized binomial state of light, which features a binomial photon number distribution in light pulses. Previous work by our group has examined other higher-order nonclassicality in single-and two-mode systems of GBS. Here we focus on the degree of polarization, an essential factor for observing entanglement in two-mode quantum states. Our findings emphasize the role of quantum polarization in detecting entanglement between optical modes, a fundamental resource for quantum communication protocols, including quantum teleportation and cryptography. The study demonstrates that TMGBS is an optimal candidate for achieving high degrees of quantum polarization under varied parameters, providing insights that could advance quantum technologies like quantum communication and metrology, where entanglement is pivotal. © 2025 IEEE.

关键词： Quantum entanglement

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Effect of Bi content on the microstructure and mechanical properties of Sn-Bi-Zn-In alloy

Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Weld...

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Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society 2023年第4期41卷 348-355页

作者： Nakawaki, Hiroki Tatsumi, Hiroaki Nitta, Shunya Yang, Chih-Han Lin, Shih-Kang Nishikawa, Hiroshi Joining and Welding Research Institute Osaka University Japan Graduate School of Engineering Osaka University Japan Department of Material Science and Engineering National Cheng Kung University Taiwan

In recent years, low-melting-temperature solders are required in electronics packaging. Among them, Sn-Bi alloys are expected to exhibit good wettability and strength. However, they have difficulty in ductility due to the brittle nature of Bi. In some research, to improve the mechanical property of Sn-Bi alloys, Zn and In are added. The modified alloy had better mechanical properties and the low-melting-temperature equivalent to Sn-58Bi. However, its ductility is not comparable to that of typical lead-free solder, Sn-3.0Ag-0.5Cu. Therefore, in this study, by reducing the content of Bi, we attempt to improve the ductility of Sn-Bi-Zn-In alloy. To investigate the effect of Bi content on the melting temperature, microstructure, and tensile strength were evaluated using Sn-xBi-2.6Zn-1.0In (x=45, 40, 35, 30, 25, 20 mass%) alloys. In addition, the fracture surfaces and nearby microstructures were observed to analyze the effect of the Bi content. As a result, the melting onset and offset temperatures increased with reducing the Bi content. In all alloys, the microstructures had Sn-rich phases, Bi-rich phases and Zn phases. As the Bi content was reduced, the morphology of Bi phase changed from layer-like eutectic phases to small round shape. Reducing the Bi content from 45 to 35 mass%, the ductility improved. However, with the decreasing Bi content from 35 to 20 mass%, the ductility was getting worse. The fracture surface analyses indicated that, their ductility was affected by the Bi-rich phase morphologies. Based on these results, the ductility enhancement with the enhancement with the 35 mass% Bi content would be understandable with the strain dispersion by the refined Bi-rich phases. The strength slightly increased decreasing the Bi content due to the decrease in the Sn-rich/Bi-rich phases interface. © 2023 Japan Welding Society. All rights reserved.

关键词： Tensile strength

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CFD Modelling of Solidification and Melting of Bath During Raft Formation

CFD Modelling of Solidification and Melting of Bath Durin...

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Light Metals Symposium held at the TMS Annual Meeting and Exhibition, TMS 2023

作者： Gylver, Sindre Engzelius Einarsrud, Kristian Etienne Department of Material Science and Engineering NTNU Alfred Getz’ veg 2 Trondheim7034 Norway

ISBN: (纸本)9783031225314

The dissolution of alumina in cryolite is a complex process, and better understanding is needed to ensure stable cell conditions and high energy efficiency. Additions of cold powder result in freezing of bath that hinders dissolution, and creation of rafts. The current work aims to develop and demonstrate a CFD framework in OpenFOAM for freezing of bath on a fed dose of alumina, based on the volume of fluid (VOF) method, where appropriate source- and sink terms are applied. Essential features have been verified by comparison with a Stefan problem, while simulating the dose as a floating rigid object demonstrate that a larger layer of freeze increase the damping of its movement. When simulating the dose as an immiscible fluid, spreading will hinder enough freeze to be formed around the dose. Hence, the added source terms behave as intended, but improvements on the alumina-bath interactions are needed. © 2023, The Minerals, Metals & materials Society.

关键词： Alumina

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A self-supported heterogeneous bimetallic phosphide array electrode enables efficient hydrogen evolution from saline water splitting

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Nano Research 2023年第3期16卷 3658-3664页

作者： Jingwen Li Min Song Yezhou Hu Chang Zhang Wei Liu Xiao Huang Jingjing Zhang Ye Zhu Jian Zhang Deli Wang Key Laboratory of Material Chemistry for Energy Conversion and Storage(Huazhong University of Science and Technology) Ministry of EducationHubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China Department of Applied Physics Research Institute for Smart EnergyThe Hong Kong Polytechnic UniversityHung HomKowloonHongkong 999077China

Hydrogen generation from water splitting is of great prospect for the sustainable energy ***,it is still challenging to explore stable and high-performance electrocatalysts toward hydrogen evolution reaction(HER)from saline water such as seawater due to the chloride ***,we developed a self-supported heterogeneous bimetallic phosphide(Ni_(2)P-FeP)array electrode that possesses excellent HER performance in alkaline saline water with an overpotential of 89 mV at 10 mA·cm^(−2)and long-term stability over 90 h at 200 mA·cm^(−2).The analysis showed that the heterostructure between the interfaces of Ni_(2)P-FeP plays a pivotal role in promoting the activity of ***,the bimetallic phosphide nanoarrays can be employed as a shield for chlorine-corrosion resistance in the saline water,ensuring the long-term durability of hydrogen *** employed for alkaline saline water electrolysis,a current density of 100 mA·cm^(−2)is achieved at cell voltage of 1.68 *** work presents an effective approach for the fabrication of high-performance electrode for HER in alkaline saline environments.

关键词： saline water splitting hydrogen evolution reaction bimetallic phosphides chlorine-corrosion resistance

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