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Non-invasive estimation of the powder size distribution from a single speckle image

Light(Science & Applications) 2024年第10期13卷 2221-2230页

作者： Qihang Zhang Ajinkya Pandit Zhiguang Liu Zhen Guo Shashank Muddu Yi Wei Deborah Pereg Neda Nazemifard Charles Papageorgiou Yihui Yang Wenlong Tang Richard D.Braatz Allan S.Myerson George Barbastathis Department of Electrical Engineering and Computer Science Massachusetts Institute of TechnologyCambridgeMA 02139USA Singapore-MIT Alliance for Research and Technology(SMART)Centre Singapore 117543Singapore Department of Chemical Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA Department of Mechanical Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA Process Chemistry Development Takeda Pharmaceuticals International Co40 Landsdowne StCambridgeMA 02139USA ShinrAI Center for AI/ML Data Sciences InstitutesTakeda Pharmaceuticals International Co650 E Kendall StCambridgeMA 02142USA Present address:Department of Precision Instruments Tsinghua UniversityBeijing 100084China

Non-invasive characterization of powders may take one of two approaches:imaging and counting individual particles;or relying on scattered light to estimate the particle size distribution(PSD)of the *** former approach runs into practical difficulties,as the system must conform to the working distance and other restrictions of the imaging *** latter approach requires an inverse map from the speckle autocorrelation to the particle *** principle relies on the pupil function determining the basic sidelobe shape,whereas the particle size spread modulates the sidelobe *** recently showed that it is feasible to invert the speckle autocorrelation and obtain the PSD using a neural network,trained efficiently through a physics-informed semi-generative *** this work,we eliminate one of the most time-consuming steps of our previous method by engineering the pupil *** judiciously blocking portions of the pupil,we sacrifice some photons but in return we achieve much enhanced sidelobes and,hence,higher sensitivity to the change of the size *** result is a 60×reduction in total acquisition and processing time,or 0.25 seconds per frame in our *** real-time operation in our system is not only more appealing toward rapid industrial adoption,it also paves the way for quantitative characterization of complex spatial or temporal dynamics in drying,blending,and other chemical and pharmaceutical manufacturing processes.

关键词： speckle size distribution

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Microstructural evolution of Mg-14Gd-0.4Zr alloy during compressive creep

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Journal of Magnesium and Alloys 2023年第9期11卷 3161-3173页

作者： Hui Shi Yuanding Huang Lixiang Yang Chunquan Liu Hajo Dieringa Chong Lu Lv Xiao Regine Willumeit-Römer Norbert Hort Institute of Metallic Biomaterials Helmholtz-Zentrum HereonMax-Planck-Str.1Geesthacht 21502Germany Research and Development Center Shanghai Spaceflight Precision Machinery Research InstituteShanghai 201600China School of Mechanical Engineering Guizhou UniversityGuiyang 550025China Institute of Material and Process Design Helmholtz-Zentrum HereonMax-Planck-Str.1Geesthacht 21502Germany The Instrument Analysis Center Shanghai Jiaotong UniversityShanghai 200240China Institute of Product Technology and Systems Leuphana University LüneburgUniversitätsallee 1Lüneburg D 21335Germany

The present work reports the creep behavior and microstructural evolution of the sand-cast Mg-14Gd-0.4Zr alloy(wt.%) prepared by the differential pressure casting machine. Their compressive creep tests at 250 ℃ were performed under various applied stresses(i.e., 60, 80 and100 MPa). Among them, the sand-cast Mg-14Gd-0.4Zr samples examined under 250 ℃/80 MPa for 39 and 95 h, respectively, were chosen to systemically analyze their creep mechanisms using high-angle annular dark field-scanning transmission electron microscopy(HAADF-STEM).The obtained results showed that the enhancement of creep resistance can be mainly attributed to the coherent β' and β'_F phases with an alternate distribution, effectively impeding the basal dislocations movement. However, with the creep time increasing, the fine β'+β'_F precipitate chains coarsened and transformed to semi-coherent β_1 phase and even to large incoherent β phase(surrounded by precipitate-free areas) in grain interiors. The precipitate-free zones(PFZs) at grain boundaries(GBs) were formed, and they could expand during creep deformation. Apart from the main cross-slip of basal and prismatic dislocations, type dislocations were activated and tended to distribute near the GBs. The aforementioned phenomena induced the stress concentrations, consequently leading to the increment of the creep strain.

关键词： Magnesium alloys Creep property Microstructures Precipitate chains Dislocation

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Designing lab-on-a-chip systems with attribute dependency graphs

Designing lab-on-a-chip systems with attribute dependency gr...

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2024 International Design Society Conference, Design 2024

作者： Soika, Johannes Wanninger, Tobias Muschak, Patrick Schwaminger, Sebastian Berensmeier, Sonja Zimmermann, Markus Laboratory for Product Development and Lightweight Design TUM School of Engineering and Design Technical University of Munich Germany Bioseparation Engineering TUM School of Engineering and Design Technical University of Munich Germany Division of Medicinal Chemistry Otto Loewi Research Center Medical University of Graz Austria Munich Institute for Integrated Materials Energy and Process Engineering Technical University of Munich Germany

Lab-on-a-Chip (LOC) products for point-of-care diagnostics have gained significant attention. However, there is a lack of systematic approaches for LOC product development. To address this, we introduce an Attribute Dependency Graph exemplary for a magnetophoretic LOC system for pathogen detection. This model organizes dependencies between the design variables and crucial quantities of interest, such as detectability, cost per test, and test duration. The obtained model helps to manage design complexity and can be adapted to other LOC approaches. © 2024 Proceedings of the Design Society. All rights reserved.

关键词： Lab-on-a-chip

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MXene-based materials for efficient applications in perovskite solar cells:A review

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材料科学技术（英文版） 2025年第12期215卷 214-232页

作者： Yue Li Yuhua Wang Zichao Xu Bo Peng Ngoc Quang Tran Kuldeep K Saxena S. Vadivel Xinghui Liu Hubei Province Key Laboratory of Systems Science in Metallurgical Process Wuhan University of Science and TechnologyWuhan 430081China Center for Innovative Materials & Architectures Vietnam National University Ho Chi Minh700000Vietnam Division of Research and Development Lovely Professional UniversityPhagwaraIndia Department of Physics Saveetha School of EngineeringSaveetha Institute of Medical and Technical Sciences(SIMATS)ThandalamChennaiTamil Nadu 602105India Science and Technology on Aerospace Chemical Power Laboratory Laboratory of Emergency Safety and Rescue TechnologyHubei Institute of Aerospace ChemotechnologyXiangyang 441003China

Perovskite solar cells(PSCs)exhibit significant development potential in the last decade due to their high efficiency and low manufacturing cost,with power conversion efficiencies(PCE)as high as 26.1％.How-ever,several problems still limit PSCs'performance and industrialization,including layer defects,energy level mismatch,and chemical *** are a promising class of two-dimensional(2D)tran-sition metal carbides and nitrides with excellent hydrophilicity,the tunable figure of merit,desirable electrical conductivity,abundant surface chemical end groups,and low-temperature solution *** properties make MXenes easy to combine with other materials and enrich their composites'physical and chemical properties,making them more useful in *** review systematically summa-rizes the relationship and development of PSCs and *** strategies for combining MXenes with various layer components in PSCs were ***,we discussed the advantages of MXenes as the hole-transporting layer,electron-transporting layer,perovskite active layer,and ***,we look forward to future research on MXene-based materials in the field of PSC and the next step of commercialization.

关键词： Perovskite solar cells MXenes High-efficiency Two-dimensional materials

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Bioactive Ions-Loaded Bioinks Primed for 3D Printing of Artificial Tissues

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Biomedical Materials and Devices 2024年第2期2卷 811-833页

作者： Jo, Hyo Jung Kang, Moon Sung Kim, Jeong Min Raja, Iruthayapandi Selestin Jang, Hee Jeong Park, Kyung Min Han, Dong-Wook Department of Cogno-Mechatronics Engineering College of Nanoscience and Nanotechnology Pusan National University Department of Bioengineering and Nano-Bioengineering College of Life Sciences and Bioengineering Incheon National University Institute of Nano-Bio Convergence Pusan National University Research Center for Bio Materials & amp Process Development Incheon National University

Bioactive ions have become increasingly important in tissue engineering due to their ability to improve cellular activity by modifying both cell–material and cell–cell interactions. Inorganic biomaterials have additional attributes such as mechanical properties and drug delivery. Recently, many studies have focused on fabricating three-dimensional (3D) scaffolds utilizing inorganic ions, such as bioceramics and bioactive glass, using 3D bioprinting technology. 3D bioprinting has emerged as a focal point for innovative tissue and organ reconstruction approaches. The aim of this review is to summarize the mechanisms by which inorganic ions affect the regeneration of tissues and to summarize research on 3D-printed scaffolds utilizing bioactive ions. The review summarizes how recently used inorganic ions induce biological responses in tissue regeneration through signal transduction pathways. Studies on 3D-printed scaffolds using newly developed inorganic ion-releasing hydrogels were summarized, focusing on functions that improved cell proliferation and differentiation ability or increased effectiveness in in-vivo experiments. Finally, the review discusses the difficulties and prospects for scaffolds using these inorganic ion-releasing bioinks. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC 2024.

关键词： 3D bioprinting Bioactive ions Bioinks Hydrogel Tissue engineering

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N-Doped graphene fiber anchored Pd nanoparticles as a fixed-bed catalyst for continuous-flow reduction of N-containing unsaturated compounds

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Green Synthesis and Catalysis 2024年第3期5卷 170-174页

作者： Shuaihu Du Zhuoyuan Bi Jiangbo Xi School of Chemistry and Environmental Engineering Key Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationHubei Key Laboratory of Novel Reactor and Green Chemical TechnologyKey Laboratory of Novel Biomass-Based Environmental and Energy Materials in Petroleum and Chemical IndustryWuhan Institute of TechnologyWuhan 430205China

Catalytic fixed-bed is an efficient and facile system for scalable organic synthesis due to its continuous and fast flow operation *** a key unit in the fixed-bed system,catalytically active packing materials are required to possess some properties,such as high activity,excellent stability,and porous packing ***,we prepare a fibrous fixed-bed catalyst by anchoring Pd nanoparticles on N-doped graphene fiber(NHG)(Pd/NGF).Due to the porous and loose packing structure,the resultant Pd/NGF catalyst can be easily filled into the continuous-flow reactor to construct a fixed-bed system with low flow *** corresponding catalytic fixed-bed system exhibits a favourable flow rate(8 mL/min)and excellent durability toward reduction reactions of N-containing unsaturated compounds to produce aromatic *** work provides a new design concept of fibrous fixed-bed catalysts with dual-active components(i.e.,graphene-derived active materials and metal nanoparticles)and catalytic organic synthesis in a continuous-flow process.

关键词： N-Doped graphene fiber Pd nanoparticle Fixed-bed system Organic dye Reduction reaction

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CFD modeling of droplet generation process for medical applications using the electrostatic impulse method

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Chemical and process engineering - Inzynieria Chemiczna i Procesowa 2022年第3期43卷 331-355页

作者： Cendrowski, Piotr Kramek-Romanowsk, Katarzyna Lewinska, Dorota Grzeczkowicz, Marcin Korycka, Paulina Krzysztoforski, Jan Warsaw University of Technology Faculty of Chemical and Process Engineering Ludwika Warynskiego 1 Warsaw Poland Nalecz Institute of Biocybernetics and Biomedical Engineering Polish Academy of Sciences Ks. Trojdena 4 Warsaw Poland Foundation of Research and Science Development Rydygiera 8 Warsaw01-793 Poland

The electrostatic impulse method is an established method for producing microbeads or capsules. Such particles have found application in biomedical engineering and biotechnology. The geometric properties of the droplets - constituting precursors of microbeads and capsules - can be precisely controlled by adjusting the geometry of the nozzle system, the physical properties and the flow rate of the fluids involved, as well as the parameters of the electrostatic impulse. In this work, a method of mathematical modeling of the droplet generation process using the electrostatic impulse method in a single nozzle system is presented. The developed mathematical model is an extension of the standard Volume of Fluid (VOF) model by addition of the effect of the electric field on the fluid flow. The model was implemented into the OpenFOAM toolkit for computational fluid dynamics (CFD). The performed CFD simulation results showed good agreement with experimental data. As a result, the influence of all process parameters on the droplet generation process was studied. The most significant change in droplet generation was caused by changing the electrostatic impulse strength. The presented modeling method can be used for optimization of process design and for studying the mechanisms of droplet generation. It can be extended to describe multi nozzle systems used for one-step microcapsule production. © 2022. The Author(s).

关键词： Computational fluid dynamics

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A Novel Silicone Rubber for Situation Awareness 4

A Novel Silicone Rubber for Situation Awareness

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2022 4th International Conference on Advanced Materials and Ecological Environment, AMEE 2022

作者： Xia, Bing Li, Xiaofei Yang, Xiaoyan Zhang, Donghai Zhang, Miao Li, Hao Xu, Shanjun Kong, Deqing Li, Xiang Beijing Guodianfutong Science & Technology Development Co. Ltd. Beijing100071 China Nari Group Corporation State Grid Electric Power Research Institute Jiangsu Nanjing211106 China Institute of Process Engineering Chinese Academy of Sciences Beijing102401 China

An insulator plays an important role in the external insulation of power grid. The antifouling flashover coating on the insulator's surface can effectively reduce the incidence of pollution flashover accidents. Local overheating, local arc, lightning and other damage lead to the deterioration of the antifouling flashover coating, resulting in pollution flashover accidents. In order to realize the on-line identification of electric arc on the surface of antifouling flashover coating, various functional nanoparticles were prepared and added into the silicone rubber to prepare functional antifouling flashover coating. The colour deviation of the coating heated at different temperatures was measured by a spectrophotometer, and the trace of arcs on the sample surface was observed. The results show that the functional nanoparticles can slightly improve the tensile strength and AC breakdown strength of silicone rubber composites. The composites change colour in 2 min at 250°C or 1s at 500°C, showing obvious indication traces after an electric arc passes the surface of an insulator in a short period. Still, the composites possess excellent functional properties after 1000h artificial accelerated aging test. © Published under licence by IOP Publishing Ltd.

关键词： Nanoparticles

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On the use of Physics in Machine Learning for Manufacturing process Inspection 6

On the use of Physics in Machine Learning for Manufacturing ...

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Optical Methods for Inspection, Characterization, and Imaging of Biomaterials VI 2023

作者： Barbastathis, George Zhang, Qihang Pandit, Ajinkya Tang, Wenlong Papageorgiou, Charles Braatz, Richard D. Myerson, Allan S. Tan, Bingyao Schmetterer, Leopold Department of Mechanical Engineering Denmark Department of Chemical Engineering Massachusetts Institute of Technology United States Singapore-MIT Alliance for Research & Technology Centre Massachusetts Institute of Technology United States Data Sciences Institute United States Process Chemistry Development Takeda Pharmaceuticals International Company United States School of Chemistry Chemical Engineering and Biotechnology Nanyang Technological University Singapore

ISBN: (数字)9781510664548

ISBN: (纸本)9781510664531

We discuss the use of machine learning in computational imaging for manufacturing process inspection and control. In a recent article1 we described a physics-enhanced auto-correlation based estimator (Peace) for quantitative speckle. We derived an explicit forward relationship between the particle size distribution (PSD) and the speckle autocorrelation for particle sizes significantly larger than the wavelength (×100 „ ×1,000). We subsequently trained a machine learning kernel to invert the autocorrelation and obtain the PSD, using the explicit forward model to reduce the number of experimentally acquired examples. In this talk, we present an expanded discussion of Peace and its properties, including spatial and temporal sampling and accuracy, and more general applications. © 2023 SPIE. All rights reserved.

关键词： Autocorrelation

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Agro-Waste fromGladiolus hybridaPlants: Effects of Alkaline processing on a New Natural Cellulosic Fiber Derived for Polymer Composites

ACS Sustainable Resource Management

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ACS Sustainable Resource Management 2024年第10期1卷 2314-2326页

作者： Mohammad Abul Hasan Shibly Md. Hasin Arman Md. Abdus Sabur Mohammad Amir Hossain Bhuiyan Department of Environmental Sciences Jahangirnagar University Dhaka 1342 Bangladesh Department of Textile Engineering National Institute of Textile Engineering and Research Dhaka 1350 Bangladesh Department of Industrial & Production Engineering National Institute of Textile Engineering and Research Dhaka 1350 Bangladesh Pilot Plant and Process Development Centre Bangladesh Council of Scientific and Industrial Research Dhaka 1205 Bangladesh

This study investigates the potentiality ofGladiolus hybridaleaf fibers (GHLFs) as an eco-friendly reinforcing substance for polymer-based composites. Novel natural fibers were harvested fromGladiolus hybridaleaves (GHL) and treated with NaOH alkali (T-GHLF) to assess their influence on physical, strength, molecular, and heat-related properties. Initially, the obtained fibers had a diameter of 0.3084 mm, which reduced to 0.2524 mm following alkali treatment. Chemical investigation indicated that the cellulose content increased to 57.16 wt %, an enhancement of 11.38% over the untreated fibers, which had a cellulose content of 51.32 wt %. The degree of crystallinity percentage of the raw and processed fibers was 57.85% and 60.82%, respectively, without significant change in the cellulose phase. The thermogravimetric analysis indicated that T-GHLF exhibited improved thermal stability up to 257.77 °C, with the kinetic activation energy (Ea) measured at 81.56 kJ/mol. Fourier transform infrared spectroscopy (FTIR) has been employed to observe the distribution of different chemical groups on the fiber surface. Scanning electron microscopy (SEM) revealed that the fibers had a roughened surface. According to tensile testing of a single fiber, the Young’s modulus values for GHLFs and T-GHLFs were 2.08 and 2.21 GPa, respectively. These evidences suggested that GHLFs exhibited characteristics comparable to those of presently used natural fibers, positioning them as a strong contender to replace organic fibers in resin matrix composites. As a result, these novel natural resources may assist in achieving the Sustainable development Goals of the United Nations through the sustainable utilization of agricultural waste in polymer matrix composites.

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