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Multi-Objective Optimization-Based Anonymization of Structured Data for Machine Learning

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arXiv 2025年

作者： Wei, Yusi Benson, Hande Y. Agor, Joseph K. Capan, Muge LeBow College of Business Drexel University PhiladelphiaPA United States Johns Hopkins University Applied Physics Laboratory LaurelMD United States Mechanical and Industrial Engineering Department University of Massachusetts Amherst AmherstMA United States

Data is essential for secondary use, but ensuring its privacy while allowing such use is a critical challenge. Various techniques have been proposed to address privacy concerns in data sharing and publishing. However, these methods often degrade data utility, impacting the performance of machine learning (ML) models. Our research identifies key limitations in existing optimization models for privacy preservation, particularly in handling categorical variables, assessing data utility, and evaluating effectiveness across diverse datasets. We propose a novel multi-objective optimization model that simultaneously minimizes information loss and maximizes protection against attacks. This model is empirically validated using diverse datasets and compared with two existing algorithms. We assess information loss, the number of individuals subject to linkage or homogeneity attacks, and ML performance after anonymization. The results indicate that our model achieves lower information loss and more effectively mitigates the risk of attacks, reducing the number of individuals susceptible to these attacks compared to alternative algorithms in some cases. Additionally, our model maintains comparative ML performance relative to the original data or data anonymized by other methods. Our findings highlight significant improvements in privacy protection and ML model performance, offering a comprehensive framework for balancing privacy and utility in data sharing. © 2025, CC BY.

关键词： Differential privacy

Specialising neural network potentials for accurate properties and application to the mechanical response of titanium

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npj Computational Materials 2021年第1期7卷 1908-1918页

作者： Tongqi Wen Rui Wang Lingyu Zhu Linfeng Zhang Han Wang David J.Srolovitz Zhaoxuan Wu Department of Materials Science and Engineering City University of Hong KongKowloonHong KongSARChina Hong Kong Institute for Advanced Study City University of Hong KongKowloonHong KongSARChina Beijing Institute of Big Data Research BeijingChina Laboratory of Computational Physics Institute of Applied Physics and Computational MathematicsBeijingChina Department of Mechanical Engineering The University of Hong KongHong KongSARChina International Digital Economy Academy(IDEA) ShenzhenChina

Large scale atomistic simulations provide direct access to important materials phenomena not easily accessible to experiments or quantum mechanics-based calculation *** and efficient interatomic potentials are the key enabler,but their development remains a challenge for complex materials and/or complex *** learning potentials,such as the Deep Potential(DP)approach,provide robust means to produce general purpose interatomic ***,we provide a methodology for specialising machine learning potentials for high fidelity simulations of complex phenomena,where general potentials do not *** an example,we specialise a general purpose DP method to describe the mechanical response of two allotropes of titanium(in addition to other defect,thermodynamic and structural properties).The resulting DP correctly captures the structures,energies,elastic constants andγ-lines of Ti in both the HCP and BCC structures,as well as properties such as dislocation core structures,vacancy formation energies,phase transition temperatures,and thermal *** DP thus enables direct atomistic modelling of plastic and fracture behaviour of *** approach to specialising DP interatomic potential,DPspecX,for accurate reproduction of properties of interest“X”,is general and extensible to other systems and properties.

关键词： titanium enable neural

Minimizing the Ground Effect for Photophoretically Levitating Disks

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Physical Review applied 2023年第4期19卷 044004-044004页

作者： Zhipeng Lu Miranda Stern Jinqiao Li David Candia Lorenzo Yao-Bate Thomas J. Celenza Mohsen Azadi Matthew F. Campbell Igor Bargatin Department of Chemistry University of Pennsylvania Philadelphia PA 19104 USA Department of Mechanical Engineering and Applied Mechanics University of Pennsylvania Philadelphia PA 19104 USA Department of Materials Science and Engineering University of Pennsylvania Philadelphia PA 19104 USA Department of Physics University of Pennsylvania Philadelphia PA 19104 USA Singh Center for Nanotechnology University of Pennsylvania Philadelphia PA 19104 USA

Photophoretic levitation is a propulsion mechanism by which lightweight objects can be lifted and controlled through their interactions with light. Since photophoretic forces on macroscopic objects are usually maximized at low pressures, they may be tested in a vacuum chamber in close proximity to the chamber floor and walls. We report experimental evidence that the terrain under levitating microflyers, including the chamber floor or the launchpad from which the microflyer lifts off, can greatly increase the photophoretic lift forces relative to their free-space (midair) values. To characterize this so-called “ground effect” during vacuum-chamber tests, we introduce a miniature launchpad composed of three J-shaped (candy-cane-like) wires that minimize the microflyer’s extraneous interactions with the underlying surfaces. We compare our J-shaped-wire launchpad with previously used wire-mesh launchpads for simple levitating Mylar-based disks with diameters of 2, 4, and 8 cm. Importantly, we discover that wire-mesh launchpads increase the photophoretic lift force by up to sixfold. A significant ground effect is also associated with the bottom of the vacuum chamber, particularly when the distance to the bottom surface is less than the diameter of the levitating disk. We provide guidelines to minimize the ground effect in vacuum-chamber experiments, which are necessary to test photophoretic microflyers intended for high-altitude exploration and surveillance on Earth or on Mars.

关键词： Aerodynamics Atmospheric fluid dynamics Classical mechanics Compressible flows Heat transfer Light-matter interaction mechanical properties of membranes Devices

Low voltage graphene interface engineered organic ferroelectric tunnel junction devices

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arXiv 2025年

作者： Natani, S. Khajanji, P. Cheng, L. Eshraghi, K. Zhang, Z. Shipley, W. Tao, A. Bandaru, P.R. Department of Mechanical Engineering University of California San Diego La Jolla CA United States Program in Materials Science University of California San Diego La Jolla CA United States Applied Materials Santa ClaraCA United States

It has been indicated 1 that the path forward for the widespread usage of ferroelectric (FE) materials may be considerably facilitated through the reduction of programming voltages to on-chip logic compatible values o... 详细信息

关键词： Ferroelectric devices

Designing Classical Header Bits for Quantum Wrapper Networking with O-band Quantum Signal

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Designing Classical Header Bits for Quantum Wrapper Networki...

Frontiers in Optics + Laser Science 2023, FiO, LS 203: Part of Frontiers in Optics + Laser Science 2023

作者： Gül, G. Berkay On, M. Singh, S.K. Proietti, R. Kanter, G.S. Yoo, S.J.B. Kumar, P. Graduate Program in Applied Physics Northwestern University 2145 Sheridan Road EvanstonIL60208 United States Department of Electrical and Computer Engineering University of California Davis DavisCA95616 United States Department of Electronics and Communication Eng. Indian Institute of Technology Roorkee247667 India Department of Electronics and Telecommunications Engineering Politecnico di Torino Italy Center for Photonic Communication and Computing Dept. of Electrical and Computer Eng. Northwestern University EvanstonIL60208 United States

We investigate the impact of wavelength choice for the classical headers in quantum wrapper networking with O-band quantum payload. We show that a C-band header performs substantially better than an O-band header. ... 详细信息

ISBN: (纸本)9781957171296

关键词： Bandpass filters Beam splitters Bit error rate Entanglement distribution Quantum teleportation Raman scattering

Consistent Solutions of the Radiation Diffusion Equation in Spherical and Cylindrical Geometries

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arXiv 2025年

作者： Smith, Ethan Bursch, Evan M. McClarren, Ryan G. Los Alamos National Laboratory Los AlamosNM United States Department of Applied Physics Columbia University New York CityNY United States Aerospace and Mechanical Engineering University of Notre Dame Notre DameIN United States

We have extended the radiation diffusion model of Hammer and Rosen to diverging spherical and cylindrical geometries. The effect of curvilinear geometry on the supersonic, expanding wavefront increases as the internal radius of a spherical or cylindrical shell approaches zero. Small spherical geometries are important for modeling systems at the size scale of ICF capsules, at these scales existing quasi-analytic models for planar geometry significantly disagree with the results of simulation. With this method, the benefits of rapid iteration can be applied to common spherical systems at much smaller length scales. We present comparisons between numerical diffusion solutions and the analytic model to give ranges of applicability for the model. © 2025, CC BY.

关键词： Spheres

Structure Optimization for Soft Fluidic Fish Tail

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Structure Optimization for Soft Fluidic Fish Tail

International Conference on Microelectronics, ICM

作者： Mahmoud T. Aboelrayat Yahia A. AboZaid Irene S. Fahim Ahmed Abobakr Lobna A. Said Ahmed G. Radwan Smart Engineering Systems Research Center (SESC) Nile University Sheikh Zayed City Egypt Department of Mechanical Engineering Al-Azhar University Cairo Egypt School of Engineering and Applied Sciences Nile University Giza Egypt NISC Research Center Nile University Giza Egypt Department of Engineering Mathematics and Physics Cairo University Giza Egypt

ISBN: (数字)9798350379396

ISBN: (纸本)9798350379402

The design of the actuator is crucial for enhancing the performance of soft robots, particularly in challenging environments such as underwater. Among the most favored actuation techniques for soft underwater robots are soft fluidic actuators, which emulate the oscillatory motion of a fishtail. However, the effect of design parameters on such actuators is not yet well covered. This paper investigates the impact of design parameters on a dual soft fluidic actuator inspired by a tuna fish tail using the Finite Element Method (FEM). The study focuses on four main parameters: the actuator's outer wall thickness, the gap between the actuator's inner pillows, the number of pillows, and the thickness of the passive layer between two actuators. The study found that the outer wall thickness had the largest effect on the overall deformation. Following this, the paper experimentally assesses the performance of the resulting actuator topology against the simulation results.

关键词： Actuators Shape Deformation Simulation Tail Soft robotics Fish Finite element analysis Topology Optimization

Tuning the Size and Stiffness of Inflatable Particles

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arXiv 2025年

作者： Pashine, Nidhi Wang, Dong Baines, Robert Goyal, Medha Shattuck, Mark D. O’Hern, Corey S. Kramer-Bottiglio, Rebecca Department of Mechanical Engineering Yale University New HavenCT06520 United States Department of Physics BioInspired Institute Syracuse University SyracuseNY13244 United States Department of Physics Benjamin Levich Institute City College of New York New York CityNY10031 United States Department of Physics Yale University New HavenCT06520 United States Department of Applied Physics Yale University New HavenCT06520 United States Graduate Program in Computational Biology & Biomedical Informatics Yale University New HavenCT06520 United States

We describe size-varying cylindrical particles made from silicone elastomers that can serve as building blocks for robotic granular materials. The particle size variation, which is achieved by inflation, gives rise to changes in stiffness under compression. We design and fabricate inflatable particles that can become stiffer or softer during inflation, depending on key parameters of the particle geometry, such as the ratio of the fillet radius to the wall thickness, r/t. We also conduct numerical simulations of the inflatable particles and show that they only soften during inflation when localization of large strains occurs in the regime r/t → 0. This work introduces novel particle systems with tunable size and stiffness that can be implemented in numerous soft robotic applications. © 2025, CC BY.

关键词： Stiffness

In situ Observation of Li Deposition-Induced Cracking in Garnet Solid Electrolytes

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Energy & Environmental Materials 2022年第2期5卷 524-532页

作者： Jun Zhao Yongfu Tang Qiushi Dai Congcong Du Yin Zhang Dingchuan Xue Tianwu Chen Jingzhao Chen Bo Wang Jingming Yao Ning Zhao Yanshuai Li Shuman Xia Xiangxin Guo Stephen J.Harris Liqiang Zhang Sulin Zhang Ting Zhu Jianyu Huang Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China Woodruff School of Mechanical Engineering Georgia Institute of TechnologyAtlanta Georgia 30332USA Department of Engineering Science and Mechanics The Pennsylvania State UniversityUniversity Park PA 16802USA Energy Storage Division Lawrence BerkeleyNational LaboratoryBerkeley CA 94720USA College of Physics Qingdao UniversityQingdao 266071China Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105China

Lithium(Li)penetration through solid electrolytes(SEs)induces short circuits in Li solid-state batteries(SSBs),which is a critical issue that hinders the development of high energy density *** cracking in ceramic SEs has been often shown to accompany Li penetration,the interplay between Li deposition and cracking remains ***,we constructed a mesoscale SSB inside a focused ion beam-scanning electron microscope(FIB-SEM)for in situ observation of Li deposition-induced cracking in SEs at nanometer *** results revealed that Li propagated predominantly along transgranular cracks in a garnet Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(LLZTO).Cracks appeared to initiate from the interior of LLZTO beneath the electrode surface and then propagated by curving toward the LLZTO *** resulting bowl-shaped cracks resemble those from hydraulic fracture caused by high fluid pressure on the surface of internal cracks,suggesting that the Li deposition-induced pressure is the major driving force of crack initiation and *** high pressure generated by Li deposition is further supported by in situ observation of the flow of filled Li between the crack flanks,causing crack widening and *** work unveils the dynamic interplay between Li deposition and cracking in SEs and provides insight into the mitigation of Li dendrite penetration in SSBs.

关键词： cracking garnet solid electrolyte in situ observation Li deposition