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arXiv 2025年

作者： Su, Jiayi Qian, Jingyu Yang, Liuqing Yuan, Yufan Fu, Yanbing Wu, Jie Wei, Yan Qu, Fengzhong Guangzhou511458 China Engineering Research Center of Oceanic Sensing Technology and Equipment Ministry of Education Ocean College Zhejiang University Zhoushan316021 China Provincial Key Laboratory of Cutting-edge Scientific Instruments R&D and Application Ocean College Zhejiang University Zhoushan316021 China Hainan Institute of Zhejiang University Sanya572025 China Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology 999077 Hong Kong

The perspective-n-point (PnP) problem is important for robotic pose estimation. It is well studied for optical cameras, but research is lacking for 2d forward-looking sonar (FLS) in underwater scenarios due to the vastly different imaging principles. In this paper, we demonstrate that, despite the nonlinearity inherent in sonar image formation, the PnP problem for 2d FLS can still be effectively addressed within a point-to-line (PtL) 3d registration paradigm through orthographic approximation. The registration is then resolved by a duality-based optimal solver, ensuring the global optimality. For coplanar cases, a null space analysis is conducted to retrieve the solutions from the dual formulation, enabling the methods to be applied to more general cases. Extensive simulations have been conducted to systematically evaluate the performance under different settings. Compared to non-reprojection-optimized state-of-the-art (SOTA) methods, the proposed approach achieves significantly higher precision. When both methods are optimized, ours demonstrates comparable or slightly superior precision. Copyright © 2025, The Authors. All rights reserved.

关键词： Image registration

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Increasing Octupole Collectivity across the Z=64 Isotopic Chain: B(E3) Values in Gd150

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Physical review Letters 2025年第9期134卷 092501-092501页

作者： S. Pascu E. Yüksel Abhishek P. Stevenson G. H. Bhat r. N. Mao K. Nomura C. Costache Z. P. Li School of Mathematics and Physics University of Surrey Guildford GU2 7XH United Kingdom “Horia Hulubei” National Institute for R&D in Physics and Nuclear Engineering R-77125 Bucharest-Magurele Romania Department of Higher Education (GDC Shopian) Jammu and Kashmir 192 303 India School of Physical Science and Technology Southwest University Chongqing 400715 China Department of Physics Hokkaido University Sapporo 060-0810 Japan Nuclear Reaction Data Center Hokkaido University Sapporo 060-0810 Japan

An enhanced electric octupole (E3) strength of 45(5) W.u. has been measured for the 3−→0+ transition in Gd150, providing direct evidence for large octupole collectivity in this nucleus. The value was determined following two sensitive experiments, to measure the mean lifetime of the Jπ=3− level and the weak E3 decay branch direct to the ground state. The systematics of the E3 strength across the Gd isotopic chain reveals that enhanced octupole collectivity is obtained for Gd150. The increasing low-lying octupole strength in the Gd isotopes is analyzed with five state-of-the-art theoretical models. It is found to be best reproduced by quasiparticle random phase approximation calculations, providing a good understanding of octupole collectivity in the rare-earth region.

关键词： Gadolinium alloys

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Experimental research of polymer fracture under hydro-mechanical behavior

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Geomechanics and engineering 2025年第3期41卷 337-349页

作者： reffas, S.A. Elmeguenni, M. Zagane, M.S. Moulgada, A. Yaylacı, M. Yekhlef, r. Öztürk, Ş. Özdemir, M.E. Yaylaci, E. Uzun Department of Engineering Mechanics University Djilali Liabes of sidi bel abbés 22000 Algeria Department of Mechanical Engineering University of Ibn Khaldoun Tiaret 14000 Algeria Department of Civil Engineering Recep Tayyip Erdogan University Rize53100 Turkey Turgut Kıran Maritime Faculty Recep Tayyip Erdogan University Rize53900 Turkey Murat Yaylacı-Luzeri R&D Engineering Company Rize53100 Turkey Research center in Industrial Technology CRTI P.O.Box 64 Cheraga Algiers16014 Algeria Department of Civil Engineering Cankiri Karatekin University Çankırı18100 Turkey Faculty of Fisheries Recep Tayyip Erdogan University Rize53100 Turkey

POM pipes are used to transport fluids. For this application, in-depth knowledge of the material’s mechanical behavior and long-term performance is essential when subjected to mechanical stress. This article used an experimental approach based on macroscopic tests (thermal analysis technique for POM, tensile testing on notched axisymmetric specimens with measurement of the volume change), and complementary microscopic observations (MEB) to identify the cause of the damage. The results of the tests carried out at ambient temperature will be presented to show the influence of the type of control and the measurement principle (an assumption of homogeneous or isochoric deformation versus an assumption of transverse isotropic deformation) on the material’s response. © 2025 Techno-Press, Ltd.

关键词： Tensile testing

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Numerical Simulation and Comparison of Flow Field in different dynamic Co-Culture Conditions

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Biotechnology Journal 2025年第5期20卷 e70039页

作者： Li, Liying Liu, Xinyue Sun, Huamao Ma, Hailin Cheng, Yuen Yee Li, Xiangqin Jia, Zhilin Zhao, Jiaquan Song, Kedong State Key Laboratory of Fine Chemicals Dalian R&D Center for Stem Cell and Tissue Engineering Cancer Hospital of Dalian University of Technology Dalian University of Technology Dalian China Mathematics Teaching and Research Group The High School Attached to Dalian University of Technology Dalian China Institute for Biomedical Materials and Devices Faculty of Science University of Technology Sydney SydneyNSW Australia Department of Hematology the First Affiliated Hospital of Dalian Medical University Dalian China School of Energy and Power Engineering Huazhong University of Science and Technology Wuhan China Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education Dalian Minzu University Dalian China

Bioreactor technology facilitates the gradual automation of cell expansion and the development of biofunctional synthetic alternatives. However, it is difficult to fully understand the flow field and force field environments formed in it by experimental means. Computational fluid dynamics (CFd) offers a robust framework for analyzing and understanding the impacts of fluid flow, material diffusion, and fluid shear stress (FSS) on in vitro cell and tissue regeneration dynamics. In this study, the FLUENT software is used to simulate and calculate the flow field environment of the rotary cell culture system (rCCS) and spinner flask (SF), including dynamic pressure, shear stress, and velocity distribution. Particles of two diameters for three-dimensional cell culture were randomly arranged in different radial/axial positions, and the FSS on the particles in rCCS and SF at different rotational speeds was also analyzed. It is expected to visualize the flow field distribution of the bioreactor and local hydrodynamic changes near the particles, and provide positive assistance for the dynamic culture/co-culture of different cells-microcarriers complex. The distribution of FSS on randomly arranged L and S particles was analyzed in detail to evaluate and screen the suitable operating conditions of these two bioreactors. Visually understanding the flow field distribution and local hydrodynamic changes within the bioreactor is expected to provide positive assistance for dynamic culture. The particles may periodically contact the fresh oxygenated medium during rotation with the fluid. Two fluid circulations in SF were generated in the upper/lower area of the blade, and a relatively static fluid circulation area was formed at the bottom with low velocity and pressure in the center, which was not conducive to material exchange. rotary bioreactors may be more suitable than spinner flasks as a dynamic culture tool for some types of cells or other constructs. © 2025 Wiley-VCH GmbH.

关键词： Tissue culture

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Vapor-induced phase separation PVdF membranes incorporating alkyl-modified nanoparticles for versatile membrane distillation

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desalination 2025年 613卷

作者： Venault, Antoine Chen, Ting-Wei Maggay, Irish Valerie Chang, Yung R&D Center for Membrane Technology and Department of Chemical Engineering Chung Yuan Christian University Chung-Li 32023 Taiwan

This study explores the formation of superhydrophobic membranes by the vapor-induced phase separation (VIPS) process for versatile direct contact membrane distillation (dCMd) applications. Hydrophobic silica-based nanoparticles were synthesized and blended with polyvinylidene fluoride in green solvent triethyl phosphate. In the optimized conditions, the membrane presented a pore size (0.27 μm) and water contact angle in air (162°) suitable for dCMd and arising in a high liquid entry pressure. With a feed temperature of 60 °C and a transmembrane temperature gradient of 35 °C, the rejections were 99.99 %, 99.99 %, 99.93 %, and >95 %, using synthetic sea water (35 g/L NaCl), concentrated saline water, real sea water and a 30 ppm-perfluorooctanoic acid solution, respectively. The flux always ranged between 24 and 25 LMH. These values compete or outperform state-of-the-art membranes. Considering the relative ease of the membrane preparation process, its resistance to wetting (performance maintained after adding up to 0.3 mM surfactant) and scaling (no observed crystals arising from heterogeneous nucleation), but also its stability as tested by performing a 70 h-long test, these novel VIPS membranes are deemed suitable for versatile dCMd applications aimed at water desalination or purification. © 2025 Elsevier B.V.

关键词： Perfluorooctanoic acid PVdF membranes Saline water Sea water Versatile dCMd VIPS process

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Securing the digital Frontier: An Analysis of Cybersecurity Strategies and Obstacles

Securing the Digital Frontier: An Analysis of Cybersecurity ...

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Computational, Communication and Information technology (ICCCIT), International Conference on

作者： V. Saravanan Indumathi. G. S Sathish Kumar James V.Samuthira Pandi J. Shakila S. Banumathi Department of Nano Electronics Materials and Sensors Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences Saveetha University Chennai Tamil Nadu India Department of MBA St Joseph's College of Engineering OMR Chennai BNY Mellon Center Pittsburgh USA Centre for Advanced Wireless Integrated Technology Chennai Institute of Technology Chennai Tamil Nadu India Department of CSE Jeppiaar Engineering College Rajiv Gandhi Salai Chennai Department of Computer Science Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology

ISBN: (数字)9798331512965

ISBN: (纸本)9798331512972

In an era where digital connectivity is ubiquitous, the imperative to safeguard cyberspace has never been more pressing. This research delves into the multifaceted landscape of cybersecurity, examining the strategies employed by governments, businesses, and individuals to protect sensitive information and critical infrastructure from cyber threats. By leveraging a mixed-methods approach, which includes a review of existing literature, case studies, and expert interviews, the research provides a nuanced understanding of the cybersecurity ecosystem. Key findings reveal that while technological advancements have bolstered defense mechanisms, including sophisticated malware, advanced persistent threats (APTs), and insider threats, continues to outpace traditional security measures. Moreover, the study underscores the critical role of human factors, such as user error and inadequate training, as significant vulnerabilities. The research concludes with a set of recommendations aimed at enhancing cybersecurity posture, including the adoption of a proactive, adaptive defense strategy, increased investment in cybersecurity education and awareness, and the fostering of international cooperation to combat transnational cybercrime. The insights gleaned from this analysis are intended to inform policymakers, industry leaders, and cybersecurity professionals, equipping them with the knowledge to fortify the digital frontier against evolving threats.

关键词： Training reviews Pressing Malware Critical infrastructure Information and communication technology Computer security Protection Interviews Investment

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Carbon black-modified polyvinylidene fluoride vapor-induced phase separation membranes for effective direct contact membrane distillation

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Journal of Membrane Science 2025年 732卷

作者： Antoine Venault Yuan-Chen Huang Yung Chang R&D Center for Membrane Technology and Department of Chemical Engineering Chung Yuan Christian University Chung-Li 32023 Taiwan

We report the formation of polyvinylidene fluoride (PVdF)-based membranes by the vapor-induced phase separation (VIPS) process, from casting solutions containing controlled amounts of carbon black (CB), a non-toxic and inexpensive material, and utilizing triethyl phosphate as the solvent. A relative humidity of 75 % and an exposure time of 20 min led to the best membrane in terms of hydrophobicity (water contact angle between 143° and 147°). The target mean pore size (<0.5 μm) and liquid entry pressure (>200 kPa) could be reached from a 2 wt%-CB content. The positive influence of CB on mechanical strength and thermal retention was also demonstrated. during 3h-direct contact membrane distillation (dCMd), setting the feed and permeate temperatures to 60 °C and 25 °C, respectively, the flux was steady to 24 LMH with synthetic sea water (NaCl 35 g/L) and real sea water, and 22 LMH using a concentrated salt solution. The rejection was in the range 99.96–99.99 %. during similar tests run while exposing the membrane to light under light power (40W), the flux of the CB-loaded membrane reached up to 30 LMH due to the heat retention properties of the particles. It also demonstrated better wetting and scaling resistances than the virgin membrane. The CB-modified VIPS membranes exhibit competitive flux and rejection rates in various desalination scenarios under relatively low-energy conditions (i.e., moderate feed temperatures), and their performance can be further enhanced under low-power light exposure, making them a promising candidate for dCMd processes.

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A combined experimental and machine learning exploration of Ti2-xZrxMnCrFeNi high entropy Laves hydrides

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Materialia 2025年 40卷

作者： Enblom, Veronica Clulow, rebecca Ha, Tae-Jun Witman, Matthew d. Way, Lauren E. Han, Sung Ju Brant Carvalho, Paulo H.B. Stavila, Vitalie Suh, Jin-Yoo Sahlberg, Martin Fadonougbo, Julien O. Department of Chemistry - Ångström Laboratory Uppsala University Uppsala751 21 Sweden Functional Materials and Components R&D Group Korea Institute of Industrial Technology Gangneung25440 Korea Republic of Sandia National Laboratories LivermoreCA94550 United States Center for Hydrogen Energy Materials Korea Institute of Science and Technology Seoul02792 Korea Republic of Department of Materials Science and Engineering & Research Institute of Advanced Materials Seoul National University Seoul 08826 Korea Republic of

A series of high entropy AB2-type Ti2-xZrxMnCrFeNi alloys (x = 0.6, 0.7, 0.8, 0.9, 1.0, 1.1 and 1.2) were synthesized to investigate their potential for hydrogen storage and chemical compression. The influence of the Ti/Zr ratio was explored in terms of structural, microstructural and thermodynamic properties. The storage capacity together with the reaction enthalpy and entropy changes of the synthesized high entropy alloys were compared to predictions from Machine Learning (ML) to investigate changes in these properties across the explored composition space. The results revealed that a decreasing Zr content consistently lowered the hydride formation enthalpy and increased the plateau pressure from 8 to >90 bar H2 at 25 °C, in good agreement with ML predictions. Selected compositions (x = 1.0 and 1.2) demonstrated reversible hydrogen storage capability over 150 cycles, with capacities of 1.34–1.40 wt % H2 and remarkable reaction kinetics ( © 2025

关键词： Hydrogen storage alloys

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Synergistic surface coating and doping modification strategy for high rate and stable LiFe0.4Mn0.6PO4 cathode materials

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Acta Materialia 2025年 293卷

作者： Niu, Sicheng Bing, Xingyuan You, Jiaxin Sheng, Li Zhou, Weiwei Li, Jianing Cao, Minglei Chen, Sanxia Yang, Jiaojiao Tao, Lijuan Tan, Caiwang Su, Xin State Key Laboratory of Precision Welding & Joining of Materials and Structures Harbin Institute of Technology Harbin150001 China Advanced Battery Technology Center School of Marine Science and Technology Harbin Institute of Technology Weihai264209 China School of Materials Science and Engineering Harbin Institute of Technology Weihai264209 China Hefei Metrology and Testing Center Hefei230088 China Hubei Key Lab of Energy Storage and Power Battery Hubei University of Automotive Technology Shiyan442002 China R&D Center Hubei WanRun New Energy Technology Co. Ltd Shiyan442002 China School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China

The manganese-based olivine material LiMn0.6Fe0.4PO4 (LMFP) has received significant attention for its higher energy density compared to commercial LiFePO4 (LFP). However, the inherent low charge conduction rate and Jahn-Teller distortion of Mn3+ limit the rate performance and cycle life of LMFP, hindering further application. To address these issues, we developed a simple temperature-programmed calcination method to in-situ synthesize the LiFe0.4Mn0.6PO4 materials (M-LMFP) with innovative carbon coating and phase (Fe2P and amorphous Li4P2O7) doping structures. The surface-doped Fe2P expanded the local Li+ diffusion pathway along the [101] direction. These phases enhanced the electronic conductivity and Li-ion conductivity of the LMFP, thus significantly improving the rate capability (from 137.5 mAh/g to 151.6 mAh/g at 1C). remarkably, the stabilized structure enabled the capacity retention from 69.8 % to 96.6 % after 500 cycles at 1 C. Moreover, the density functional theory (dFT) calculations revealed a reduced band gap and increased transition metal states close to the Fermi level in the M-LMFP, further explaining the excellent performance. In distinction to conventional doping and coating methods, this temperature-programmed calcination method depends only on the carbon and Fe-containing components derived directly from the raw materials. Surprisingly, the strategy in this work is extremely scalable and applicable on a large scale without introducing any additional reducing gases or cumbersome processes. © 2025

关键词： Amorphous carbon

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3d printing based on Pickering emulsions stabilized by oat insoluble dietary fiber-starch composite particles

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International Journal of Biological Macromolecules 2025年 313卷 144146页

作者： Li, Xinrui Liu, Wenchao Wang, Lijuan Li, Linlin Cao, Weiwei Chen, Junliang Law, Chung Lim Luo, Zhenjiang Pan, Lifeng duan, Xu ren, Guangyue College of Food and Bioengineering Henan University of Science and Technology Luoyang471000 China Henan Agricultural Products Processing Equipment Engineering Research Center Luoyang471000 China Yunnan Key Laboratory of Plateau Food Advanced Manufacturing Kunming650500 China College of Basic Medical Science Ningxia Medical University Yinchuan750004 China Department of Chemical and Environmental Engineering Malaysia Campus University of Nottingham Selangor Semenyih43500 Malaysia R&D Center Haitong Ninghai Foods Co. Ltd. Zhejiang Ninghai315600 China

Pickering emulsions (PEs), stabilized by solid particles, exhibit shear thinning and high viscoelasticity, showing great potential for enhancing 3d printing precision. This study used composite particles of oat insoluble dietary fiber and gelatinized starch to stabilize diacylglycerol PEs, with the goal of identifying optimal processing parameters by evaluating stability, texture, and rheological properties. results indicated that both solid particle concentration and oil phase volume fraction (φ) significantly influenced droplet dispersion and emulsion stability. Increasing particle concentration improved the system's viscosity, storage modulus, and gel strength, enhancing 3d printing capabilities. However, at a constant particle concentration, higher oil phase volume fractions resulted in more oil droplets but insufficient particles to cover the interface adequately, reducing stability and increasing particle size. When the particle concentration was 3.0 % and oil content was φ-0.3, the printed model achieved 98.99 % accuracy and 95.16 % stability, demonstrating the potential of PEs as effective food 3d printing inks and providing a basis for expanding applications in the food sector. © 2025 Elsevier B.V.

关键词： Shear thinning

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