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High-pressure phase of cold-compressed bulk graphite and graphene nanoplatelets

Physical Review B 2023年第18期107卷 184102-184102页

作者： Ilias Efthimiopoulos Elissaios Stavrou Koichiro Umemoto Sathish Mayanna Antonius Torode Jesse S. Smith Stella Chariton Vitali B. Prakapenka Alexander F. Goncharov Yuejian Wang Department of Physics Oakland University Rochester Michigan 48309 USA GFZ German Research Center for Geosciences Telegrafenberg 14473 Potsdam Germany Materials Science and Engineering Program Guangdong Technion–Israel Institute of Technology Shantou Guangdong 515063 China Department of Materials Science and Engineering Technion–Israel Institute of Technology Haifa 32000 Israel Guangdong Provincial Key Laboratory of Materials and Technologies for Energy Conversion Guangdong Technion–Israel Institute of Technology Shantou Guangdong 515063 China Earth-Life Science Institute Tokyo Institute of Technology Meguro Tokyo 150–8550 Japan Carl Zeiss Microscopy GmbH Carl Zeiss Strasse 22 73447 Oberkochen Germany HPCAT X-ray Science Division Argonne National Laboratory Argonne Illinois 60439 USA Center for Advanced Radiation Sources University of Chicago Chicago Illinois 60637 USA Earth and Planets Laboratory Carnegie Institution of Washington Washington DC 20015 USA

We have studied the high-pressure vibrational and structural behavior of bulk graphite and graphene nanoplatelets at room temperature by means of high-pressure Raman spectroscopic and x-ray diffraction probes. We have detected a clear pressure-induced structural transition in both materials, evidenced by the appearance of new Bragg peaks and Raman features, deviating from the starting hexagonal graphitic structure. The high-pressure phase is identified as a partially disordered orthorhombic structure, consisting of mixed sp2- and sp3-type bonding. Our experimental findings serve as direct evidence for the existence of a metastable transient modification in cold compressed carbon, lying between the sp2-type graphite and sp3-type diamond allotropes.

关键词： Phase transitions Structural properties Carbon-based materials Crystal structures Elemental materials Pressure effects Pressure techniques Raman spectroscopy X-ray diffraction

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Rice Variety Identification Using Edge Feature Extraction and Texture-Based Segmentation

Rice Variety Identification Using Edge Feature Extraction an...

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International Seminar on Application for Technology of Information and Communication (ISemantic)

作者： Aji Setiawan Kusworo Adi Catur Edi Widodo Doctoral Program of Information Systems School of Postgraduate Studies Diponegoro University Semarang Indonesia Department of Information Technology Faculty of Engineering Darma Persada University Jakarta Indonesia School of Postgraduate Studies Diponegoro University Semarang Indonesia Department of Physics Faculty of Science and Mathematics Diponegoro University Semarang Indonesia

This research proposes a methodology for identifying the optimal feature combination using Support Vector Machine (SVM) based on edge and texture features. Canny, Sobel, and Prewitt for edge detection and GLCM, Gabor, and LBP for texture analysis are popular feature extraction techniques widely employed in various cases. The approach combines edge and texture features with SVM to classify rice types into five categories: Ipsala, Jasmine, Karacadag, Arborio, and Basmati. Experimental results demonstrate that SVM using Canny, Sobel, and Prewitt combined Gabor texture features outperforms the comparative methods. A comparative analysis based on accuracy scores using confusion matrices is conducted. Combining all feature edge methods, Canny, Sobel, and Prewitt with Gabor on SVM classification is the best model for rice object classification, achieving an accuracy of 96%.

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Solid waste management in the paper industry 5

Solid waste management in the paper industry

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5th International Conference on Energy, Environmental and Information System, ICENIS 2020

作者： Devichi Wibowo, Isabella Purwanto, P. Suherman, S. Master Program of Environmental Science Post-Graduate Studies Universitas Diponegoro Semarang Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Diponegoro Semarang Indonesia

The industry developed rapidly since the Industrial Revolution in the 18th century. The side effect of industrial development was a large amount of non-hazardous waste and hazardous waste. All of this waste must be managed properly so that environmental sustainability is maintained and does not cause harm or problems to the community. A review will be conducted from various research journals in various countries and the types of waste also vary, namely plastic, pulp and paper industry waste, and other solid waste. A comparison of solid waste management will be carried on to reduce the generation of waste in the environment. © The Authors, published by EDP sciences, 2020.

关键词： Solid wastes

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Scalable High-Areal-Capacity Li-S Batteries Enabled by Sandwich-Structured Hierarchically Porous Membranes with Intrinsic Polysulfide Adsorption

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Nano Letters 2020年第9期20卷 6922-6929页

作者： Li, Xiangcun Zhang, Yue Wang, Shuting Liu, Yang Ding, Yu He, Gaohong Jiang, Xiaobin Xiao, Wu Yu, Guihua State Key Laboratory of Fine Chemicals Chemical Engineering Department Dalian University of Technology Dalian 116024 China Materials Science and Engineering Program Texas Materials Institute University of Texas at Austin Austin 78712 TX United States

The key to realizing practical applications of Li-S batteries lies in scalable fabrication of cathode materials with high sulfur-loading and strong binding of lithium polysulfides (LiPSs). We report a scalable CeO2-CNT@C porous membrane with a large porosity of 90%. Introducing CNTs is critical to increase the porosity and construct porous networks with CNTs as the skeleton and CeO2-doped carbon as the shell. The macropores can improve the transport of Li+ and electrolyte, while the porous networks possess high polysulfide-adsorbing and electron-transferring ability. The CeO2-CNT@C membrane can serve as an Al foil-free cathode and an interlayer for Li-S batteries. Moreover, CeO2 can immobilize LiPSs and can alleviate its shuttle effect. The Li-S batteries with a sulfur loading of 6.2 mg cm-2 deliver a capacity of 847 mA h g-1 after 100 cycles, showing a high areal capacity of 5.25 mA h cm-2 at a low electrolyte/sulfur ratio of 5.2 μL mg-1. © 2020 American Chemical Society.

关键词： CeO2 Li-S batteries Membrane Phase inversion Porous materials

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Investigation of tamarind seed oil biodiesel with aluminium oxide nanoparticle in CI engine

Investigation of tamarind seed oil biodiesel with aluminium ...

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International Conference on Newer trends and Innovations in Mechanical engineering, ICONTIME 2020

作者： Shaisundaram, V.S. Chandrasekaran, M. Muraliraja, R. Shanmugam, Mohanraj Baskar, S. Bhuvendran, Arun Department of Automobile Engineering Vels Institute of Science Technology and Advanced Studies Chennai India Department of Mechanical Engineering Vels Institute of Science Technology and Advanced Studies Chennai India Department of Materials Engineering and Nanotechnology Politecnico di Milano Milano Italy Department of Automobile Engineering Kumaraguru College of Technology Coimbatore India

Because of increasing automobiles, power plants and factories, increasing of this automobiles, power plants produce the more emissions like CO, HC and NOx. So that the world is searching for the alternative fuel, which will not create any harm to the environment and also it would be less in cost. Biodiesel is one of the main solutions to the global energy crisis. In this present work studied the performances and emission characteristics of Tamarind Seed Oil Bio-diesel (TSO). Use of additives for better combustion characteristics to the biodiesel. The blends of Tamarind Seed oil (TSO) with the additives Aluminum oxide (Al2O3) are B10 + 20 PPM Al2O3, B20 + 20PPM Al2O3, B30 + 20 PPM Al2O3. This blends were analyzed and their performance and emissions characteristics compared with performance and emission characteristics of diesel. Tests were carried out over entire range of engine operation at varying conditions of load. The engine exhaust gas emissions are reduced with increase biodiesel concentration. © 2020 Elsevier Ltd. All rights reserved.

关键词： Biodiesel

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Characterization of mono-chip amplifier-shaper and discriminator FGATI for muon spin imaging spectroscopy

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Interactions 2024年第1期245卷 1-8页

作者： Subhi, Hassan Takayama, Gen Kojima, Kenji M. Shoji, M. Miyahara, M. Honda, R. Tanaka, M.M. Ishida, T. Department of Physics and Astronomy University of Waterloo 200 University Ave W WaterlooONN2L 3G1 Canada Centre for Molecular and Materials Science TRIUMF 4004 Wesbrook Mall VancouverBCV6T2A3 Canada Department of Physics Osaka University Osaka Toyonaka Japan Stewart Blusson Quantum Matter Institute the University of British Columbia 2355 East Mall VancouverBrisish ColumbiaV6T 1Z4 Canada Institute of Particle and Nuclear Studies KEK Oho 1-1 Ibaraki Tsukuba305-0801 Japan Division of Quantum and Radiation Engineering Osaka Metropolitan University Gakuen Cho 1-2 Osaka Sakai599-8570 Japan

We report test of a trans-impedance fast amplifier FGATI, using a semiconductor-based photo sensors SiPM and a pulsed laser. The FGATI chip contains 16 channels of amplifier-shaper-discriminator (ASD) circuits which generates low-voltage differentiation signal (LVDS) discriminator digital outputs, readily analyzed its timing by a Time to Digital Converter (TDC). The amplifier gain characteristics are tested using a voltage input pulse supplied through a coupling capacitor to FGATI. The current input from SiPM are characterized with/without the coupling capacitor. The analog signal response as well as the threshold control of the digital pulse output is characterized. The timing resolution achieved by FGATI is less than 50 ps for the saturated laser input. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.

关键词： Pulsed lasers

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Ship Propeller Rotation Threshold to Prevent Erosion and Sedimentation in Coastal Waters

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哈尔滨工程大学学报(英文版) 2024年第4期23卷 798-811页

作者： Abdul Kadir I.Istadi Agus Subagio I.Iskendar W.Waluyo Abdul Muis Dewi Kartikasari Siti Sadiah A.B Widagdo M.P Helios Mochammad Nasir N.Nurhadi Doctoral Program of Environmental Science School of Postgraduate StudiesUniversitas DiponegoroSemarangCentral Java 50275Indonesia Research Center for Transportation Technology National Research and Innovation Agency(BRIN)Jakarta 10340Indonesia Department of Chemical Engineering Faculty of EngineeringUniversitas DiponegoroSemarangCentral Java 50275Indonesia Department of Physics Faculty of Science and MathematicsUniversitas DiponegoroSemarangCentral Java 50275Indonesia Research Center for Hydrodynamic Technology National Research and Innovation Agency(BRIN)Jakarta 10340Indonesia Research Center for Energy Conversion and Conservation National Research and Innovation Agency(BRIN)Jakarta 10340Indonesia Directorate of Laboratory Management Research Facilitiesand Science and Technology ParkNational Research and Innovation Agency(BRIN)Jakarta 10340Indonesia

The rotation of a ship’s propeller can accelerate the water flow around it,which puts pressure on seabed *** pressure on the seabed can significantly trigger erosion and sedimentation of coastal *** the impact that can be caused,the ship’s propeller rotation limit needs to be determined to avoid damage to the aquatic *** research determines the threshold of ship propeller rotation based on the water flow velocity *** has been carried out at the Hydrodynamics Laboratory on several variations of propeller rotation R_(rmp)(r/min)and water depth using empirical approaches,numerical simulations,and scale model *** based on general standard criteria for erosion and sedimentation shows that a propeller with a diameter(D_(p))of 1.5 m is safe for propeller rotation at 25 r/min at all water ***,the propeller rotation of 75 r/min is safe for a distance between the propeller axis and the bottom of the water equal to D_(p).Meanwhile,rotation at 120 r/min is safe at a minimum distance of 1.5 D_(p),and 230 r/min is safe for a minimum distance of 2.0 D_(p).The propeller rotation threshold criteria are essential to determining the new under-keel clearance for environmentally friendly ship *** values vary based on seabed particle type and water depth.

关键词： Landing craft tank Water flow velocity Seabed erosion Under keel clearance

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Stabilizing zinc anode via a chelation and desolvation electrolyte additive

Advanced Powder Materials

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Advanced Powder materials 2022年第1期1卷 97-105页

作者： Jin Cao Dongdong Zhang Rungroj Chanajaree Yilei Yue Zhiyuan Zeng Xinyu Zhang Jiaqian Qin International Graduate Program of Nanoscience&Technology Chulalongkorn UniversityBangkok10330Thailand Metallurgy and Materials Science Research Institute Chulalongkorn UniversityBangkok10330Thailand State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao066004China Department of Materials Science and Engineering City University of Hong Kong83 Tat Chee AvenueKowloonHong Kong999077China Research Unit of Advanced Materials for Energy Storage Chulalongkorn UniversityBangkok10330Thailand

The uncontrollable dendrites growth and intricately water-induced side reactions occurred on zinc anode leads to safety issues and poor electrochemical kinetics,which largely limit the widespread application of zinc-ion batteries(ZIBs).Herein,ethylenediaminetetraacetic acid disodium salt(EDTA-2Na)is utilized as an electrolyte additive to strengthen the reversibility and cycling stability of zinc *** results and theoretical calculation demonstrate that the EDTA-2Na presents a much stronger coordination with Zn^(2+)when comparing with H_(2)O molecular,implying the EDTA-2Na is capable to enter the solvation shell of[Zn(OH_(2))_(6)]^(2+)and coordinate with Zn^(2+)ions,thus achieving a flat and smooth zinc deposition with less by-products(Zn_(4)SO_(4)(OH)6·xH_(2)O and H_(2)).Consequently,the zinc symmetric battery with EDTA-2Na additive delivers an excellent cycling stability up to 1800 h under current density of 1 mA cm^(-2),and the hydrogen evolution reaction(HER),corrosion,by-product issues are significantly ***,the rate performance and stability of coin-type and pouch-type Zn||MnO2/graphite batteries are significantly boosted via EDTA-2Na additive(248 mAh g^(-1)at 0.1 A g^(-1),81.3%after 1000 cycles at a A g^(-1)).This kind of electrolyte additive with chelation and desolvation functions shed lights on strategies of improving zinc anode stability for further application of ZIBs.

关键词： Zinc-ion battery Zinc anode Dendrites EDTA-2Na Desolvation

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Graphdiyne oxide-accelerated charge carrier transfer and separation at the interface for efficient binary organic solar cells

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science China materials 2022年第10期65卷 2647-2656页

作者： Le Liu Yuanyuan Kan Guangliu Ran Min Zhao Zhiyu Jia Siqi Chen Jianxiao Wang Hao Chen Chengjie Zhao Ke Gao Wenkai Zhang Tonggang Jiu Science Center for Material Creation and Energy Conversion Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101China Department of Physics and Applied Optics Beijing Area Major Laboratory Center for Advanced Quantum StudiesBeijing Normal UniversityBeijing 100875China MOE Key Laboratory of Cluster Science Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China

Interfacial engineering for the regulation of the charge carrier dynamics in solar cells is a critical factor in the fabrication of high-efficiency *** on the successful preparation of highly dispersible graphdiyne oxide(GDYO)with a large number of functional groups,we fabricated organic solar cells employing GDYO-modified poly(3,4-ethylenedioxythiophene)/poly(styrene sulfonate)(PEDOT:PSS)as hole transport *** show that theπ±πinteraction between GDYO and PEDOT:PSS is beneficial to the formation of an optimized charge carrier transfer channel and improves the conductivity and charge carrier mobility in the hole transport ***,the improved interfacial contact contributes to the suppression of charge carrier recombination and the elevation of charge carrier extraction between the hole transport layer and the active *** importantly,the occurrence of charge carrier separation benefits from the optimized morphology of the active layer,which efficiently improves the performance,as proven by the results of transient absorption ***,with the holistic management approach to the multiobjective optimization of the charge carrier dynamics,a photoelectric conversion efficiency of 17.5%(with the certified value of 17.2%)is obtained for binary organic solar *** of these results indicate the potential application of the functionalized graphdiyne in the field of organic optoelectronic devices.

关键词： graphdiyne oxide hole transport layer charge carrier dynamics PEDOT:PSS organic solar cells

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Oxidation of Eutectic Gallium-Indium Nanoparticles

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Microscopy and Microanalysis 2024年第SUPPLEMENT_1期30卷

作者： Ye, Shuonan Chen, Xiaobo Sun, Xianhu Singler, Timothy Zhang, Pu Zhou, Guangwen Materials Science and Engineering Program & Department of Mechanical Engineering State University of New York at Binghamton Binghamton New York United States

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