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BULK ETCHING rATE ASSESSMENT FOr POLYMEr TrACK rAdIATION dETECTOrS

UPB Scientific Bulletin, Series A: Applied Mathematics and Physics 2024年第3期86卷 136-144页

作者： Popovici, Mara-Georgiana dinescu, Eliza Irina Avram, Irina Chiriță, Eugenia-Mihaela Mitu, Iani-Octavian Gheorghiu, Cristina Constanta Extreme Light Infrastructure – Nuclear Physics "Horia Hulubei" National Institute for R&D in Physics and Nuclear Engineering Romania Nuclear Physics Department "Horia Hulubei" National Institute for R&D in Physics and Nuclear Engineering Romania National University of Science and Technology POLITEHNICA Bucharest Romania

Poly(Allyl diglycol Carbonate) (PAdC) detectors are widely used in nuclear particles detection due to their high sensitivity. Particles impinging the polymer form latent tracks which are enlarged through a chemical etching process. This study presents a quantitative assessment of the bulk etching rate obtained by two approaches: (i) mass difference and (ii) fission fragments method. Bulk etching rate is the main parameter reflecting the etching procedure’s efficiency and tracks development. The obtained values of this parameter are furthermore important for the tracks reading and counting processes relevant for dosimetry applications. We present the results obtained through the above-mentioned methods applied on detectors that have been exposed to Th-228 and Cf-252 radioactive sources. © 2024, Politechnica University of Bucharest. All rights reserved.

关键词： Etching

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Case retrieval Strategy of Turning Process Based on Grey relational Analysis

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Computer Modeling in engineering & sciences 2024年第2期138卷 1663-1678页

作者： Jianfeng Zhao Yunliang Huo Ji Xiong Junbo Liu Zhixing Guo Qingxian Li School of Mechanical Engineering Sichuan UniversityChengdu610065China Sichuan Engineering Technology Research Center of Intelligent Design and Service for Cutting Tools Yibin R&D Park of Sichuan UniversityYibin644000China Department of R&D Pengxi Heye High-Tech Co.Ltd.Suining629000China

To solve the problem of long response time when users obtain suitable cutting parameters through the Internet based platform,a case-based reasoning framework is ***,a Hamming distance and Euclidean distance combined method is designed to measure the similarity of case features which have both numeric and category *** addition,AHP(Analytic Hierarchy Process)and entropy weight method are integrated to provide features weight,where both user preferences and comprehensive impact of the index have been *** relation analysis is used to obtain the similarity of a new problem and alternative ***,a platform is also developed on Visual Studio 2015,and a case study is demonstrated to verify the practicality and efficiency of the proposed *** method can obtain cutting parameters which is suitable without iterative *** with the traditional PSO(Particle swarm optimization algorithm)and GA(Genetic algorithm),it can obtain faster response *** method can provide ideas for selecting processing parameters in industrial *** guaranteeing the characteristic information is similar,this approach can select processing parameters which is the most appropriate for the production process and a lot of time can be saved.

关键词： CBr turning process grey relation AHP entropy weight

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Interior noise prediction of inter-coach space of high-speed maglev trains based on wavenumber decomposition on aerodynamic excitation

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Noise and Vibration Worldwide 2024年第6-7期55卷 304-321页

作者： Wang, rusi Huang, Jingyu Institute of Rail Transit Tongji University Shanghai China National Maglev Transportation Engineering R&D Center Tongji University Shanghai China

Current research on noise and vibration control of high-speed maglev trains pays more attention to far-field noise, while the level of interior noise has a direct impact on the ride comfort and should be placed equal weight on. In this paper, inter-coach space, one of the main pressure fluctuation sources of a specific type of high-speed maglev train with a design speed of 600 km·h−1, is taken as the research object. The turbulent and acoustic components of wall pressure fluctuations (WPF) are separated based on a wavenumber-frequency analysis approach, and then each component is applied as different forms of source input to the vibroacoustic model, namely, finite element method-boundary element method (FEM-BEM) and statistical energy analysis (SEA) for low- and high-frequency ranges respectively, to investigate the contribution of both components to interior acoustic cavity in all frequency range. It can be seen quantitatively from the results that the amplitude of turbulent component is generally much higher than that of the acoustic one, but it can be vice versa when it comes to the interior response. The conclusion drawn in this paper are able to provide guidance for future researches on more targeted interior noise control of high-speed maglev trains. © The Author(s) 2024.

关键词： Boundary element method

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development and Validation of a Pilot Viscosity Monitoring System for Secondary Battery Slurries

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Transactions of the Korean Society of Mechanical Engineers, B 2024年第3期48卷 203-210页

作者： You, Hyun dong Choi, Hyeon Woo Lee, Byung Min Kim, Han Sung Hwang, Wook ryol School of Mechanical and Aerospace Engineering Gyeongsang National University Korea Republic of R&D Center Yunsung F&C Korea Republic of

In the mixing process of lithium-ion secondary battery electrodes, rheological properties of anode and cathode slurries influence significantly the electrochemical and thermomechanical behaviors of the final electrode and, among others, the viscosity is the most important property. The slurry viscosity varies with shear rate and, therefore, the measurement of viscosity involves both the measurements of (representative) both shear rate and viscosity. In this study, we developed and validated a pilot-scale in-situ/on-line viscosity monitoring system through a pipe flow system, using the energy-dissipation-rate-based flow quantification technique, by determining the effective viscosity and effective shear rate from the information of the pressure drop and flow rate, respectively. The viscosity measurement results were validated through both numerical and experimental methods. The measured viscosity as a function of the effective shear rate had with less than 10.48% errors in comparison with the rheological data, once the optimized correction factor for the slurry was employed. © 2024 The Korean Society of Mechanical Engineers.

关键词： Shear deformation

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Optimizable KNN and ANFIS Algorithms development for Accurate Antenna Parameter Estimation

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Progress In Electromagnetics research C 2024年 142卷 207-218页

作者： ramasamy, rajendran Bennet, Maria Anto Department of Electronics and Communication Engineering Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology Chennai600062 India

The process of smart antenna synthesis involves the automatic selection of the optimal antenna type and geometry in order to enhance antenna performance. A model for intelligent antenna selection employs an optimizable K-nearest neighbors (KNN) classifier to determine the optimal antenna choice. To optimize the utilization of different learner types, the geometric parameters of the antenna are presented as the final step prior to the construction of the Adaptive Neuro-Fuzzy Inference System (ANFIS) model, which involves the integration of five distinct primary learners. The classification of three distinct types of antennas, namely helical antenna, pyramidal horn antenna, and rectangular patch antenna, is performed using an optimizable K-nearest neighbors (KNN) classifier. Additionally, an ANFIS approach is employed to determine the optimal size parameters for each antenna. The accuracy is used to evaluate the performance of an optimizable KNN classifier, whereas Mean Squared Error and Mean Absolute Percentage Error are used to evaluate the performance of an ANFIS. The proposed technique demonstrates high performance in parameter prediction and antenna categorization, achieving a Mean Absolute Percentage Error of less than 3% and an accuracy exceeding 99.16%. The recommended methodology holds significant potential for widespread application in the development of practical smart antennas. © 2024, Electromagnetics Academy. All rights reserved.

关键词： Fuzzy inference

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A novel reprocessable chloroprene rubber based on dynamic disulfide metathesis

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International Journal of Smart and Nano Materials 2024年第1期15卷 42-61页

作者： Jianliang Jiang Junxue Zhai Yanqing Chen dongqi Zhao Yakai Feng School of Chemical Engineering and Technology Collaborative Innovation Center of Chemical Science and Chemical Engineering(Tianjin)Tianjin UniversityTianjinChina R&D Department of China(Yangzhou) Material Handling Tech-Engineering LtdYangzhouChina Key Laboratory of Rubber Plastics of Ministry of Education/Shandong Province (QUsT)School of Polymer Science&EngineeringQingdao University of Science&TechnologyQingdaoChina R&D Department of Tianjin Joaboa Technology Co.Ltd TianjinP.R.China Frontiers Science Center for Synthetic Biology Tianjin UniversityTianjinChina Key Laboratory of Systems Bioengineering(Ministry of Education) Tianjin UniversityTianjinChina

For sustainable application of chloroprene rubber(Cr),a new technology is developed by the vulcanization of Cr using 2,2'-dithiodipyridine(dPd)as a cross-linking agent with the repro-cessing performance owing to disulfde *** dPd was incorporated into Cr vulcanization,the Menschutkin reac-tion between allyl chloride group and pyridine group occurred with a maximum exothermic peak at 184°*** number of effective cross-linking bond at o.5 phr dPd vulcanizate was higher than that at high dPd *** vulcanizate showed high tensile strength(11.12 MPa)and elongation at break(1253±120%)owing to the exchangeable disulfide bond in the *** the catalysis of triphenylphosphine,the metathesis of disulfide compound was improved obviously,which endowed Cr/dPd vulcanizates with good recyclability *** cross-linkage maintains its stability at low temperature,thus ensuring the mechanical stability of Cr/dPd vulcanizate under the ambient *** and reprocessing of Cr/dPd vulcanizate can be conducted with common industrial rubber processing *** reprocessable chloroprene rubber could have potential appli-cation in Cr industry,also serve to significantly improve envir-onmental sustainability.

关键词： Chloroprene rubber reprocessable Menschutkin reaction disulfide

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rational design of Li_(3)V_(2)(PO_(4))_(3)/C for Phosphate-Based Symmetric Full-Cell Li-Ion Batteries

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Energy Material Advances 2024年第1期5卷 34-44页

作者： Ye-Wan Yoo Hyeong-Seok Oh Jong-Kyu Lee Jung-rag Yoon Seung-Hwan Lee Department of Battery Convergence Engineering Kangwon National UniversityChuncheon 24341Republic of Korea R&D Center Samwha CapacitorYongin 449-884Republic of Korea

To further increase the energy density of lithium-ion batteries(LIBs),various researches have been conducted on high-voltage and high-capacity cathode *** this perspective,monoclinic Li_(3)V_(2)(PO_(4))_(3) is a promising candidate due to its promising theoretical discharge capacity of 197 mAh/g with complex phase transition in the voltage range of 3.0 to 4.8 ***,such asymmetric phase transition behavior with 3 Li^(+)ion extraction/insertion is highly irreversible,resulting in an initial discharge capacity of 163 mAh/g with deteriorated capacity *** suggest that cycling Li_(3)V_(2)(PO_(4))_(3) in the voltage range of 3.0 to 4.5 V suppresses the irreversible phase transition and elution of transition ***,Li_(3)V_(2)(PO_(4))_(3) in the voltage range of 3.0 to 4.5 V delivers an initial discharge capacity of about 142 mAh/g and exhibits extremely long cycle retention(78.70%2,000 cycles),as when cycling in the voltage range of 3.0 to 4.3 V(81.67%2,000 cycles).Furthermore,we present the possibility of a Li_(3)V_(2)(PO_(4))_(3)||Li_(3)V_(2)(PO_(4))_(3) symmetric all-solid-state battery based on an N/P ratio and a cutoff voltage design,which is demonstrated in liquid electrolyte half-cells and symmetric full cells.

关键词： rational design phosphate based symmetric full cell Li ion batteries irreversible capacity fading high voltage cathode materials asymmetric phase transition behavior phase transition Li V PO C complex phase transition

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A Line Complex-Based Evolutionary Algorithm for Many-Objective Optimization

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IEEE/CAA Journal of Automatica Sinica 2023年第5期10卷 1150-1167页

作者： Liang Zhang Qi Kang Qi deng Luyuan Xu Qidi Wu the Department of Control Science and Engineering Tongji UniversityShanghai 201804 the Jiangsu Province Support Software Engineering R&D Center for Modern Information Technology Application in Enterprise Suzhou 215104China the Shanghai Institute of Intelligent Science and Technology Tongji UniversityShanghai 200092China

In solving many-objective optimization problems(MaO Ps),existing nondominated sorting-based multi-objective evolutionary algorithms suffer from the fast loss of selection *** candidate solutions become nondominated during the evolutionary process,thus leading to the failure of producing offspring toward Pareto-optimal front with *** we find a more effective way to select nondominated solutions and resolve this issue?To answer this critical question,this work proposes to evolve solutions through line complex rather than solution points in Euclidean ***,Plücker coordinates are used to project solution points to line complex composed of position vectors and momentum *** position vectors of the solution points,momentum vectors are used to extend the comparability of nondominated solutions and enhance selection ***,a new distance function designed for high-dimensional space is proposed to replace Euclidean distance as a more effective distancebased *** on them,a novel many-objective evolutionary algorithm(MaOEA)is proposed by integrating a line complex-based environmental selection strategy into the NSGAⅢ*** proposed algorithm is compared with the state of the art on widely used benchmark problems with up to 15 *** results demonstrate its superior competitiveness in solving MaOPs.

关键词： Environmental selection line complex many-objective optimization problems(MaOPs) Plücker coordinate

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Improvement of mechanical properties and investigation of strengthening mechanisms on the Ti_(3)AlC_(2) ceramic with nanosized WC addition

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Journal of Advanced Ceramics 2024年第6期13卷 861-876页

作者： Yi Zhong Ying Liu Qinkai Jiang Na Jin Zifeng Lin Jinwen Ye School of Materials Science&Engineering Sichuan UniversityChengdu 610065China Yibin R&D Park Yibin Industrial Technology Research InstituteSichuan UniversityYibin 644005China

Ti_(3)AlC_(2) (TAC) has great potential for use as an ablation material in aerospace applications due to its great oxidation/ablation resistance, but its high-temperature strength and thermal shock resistance still have much room for simultaneous improvement under fast temperature variation conditions. Herein, we used Ti_(3)AlC_(2) and WC powders as raw materials and successfully fabricated textured (Ti,W)_(3)AlC_(2) ceramic with small amounts of TiC and Al_(2)O_(3), and room temperature mechanical properties such as flexural strength (1146±46.9 MPa), fracture toughness (11.78±0.44 MPa·m^(1/2)), and hardness (5.81±0.11 GPa) at 5 wt% WC addition were achieved. The high-temperature strength of the ceramic was significantly improved, and better thermal shock resistance from 298 to 1173 K was simultaneously acquired together with the regulation of the elastic modulus, thermal conductivity, and thermal expansion coefficient, providing (Ti,W)_(3)AlC_(2) with more possibilities for fast-temperature variation applications. Strengthening and toughening mechanisms were proposed. Scanning transmission electron microscopy high-angle annular dark-field imaging (STEM-HAddF) showed that W randomly replaced the Ti1 and Ti2 sites of Ti_(3)AlC_(2), providing a good reference for establishing crystal models, and further density functional theory (dFT) calculations based on these models indicated a higher fracture energy of (Ti,W)_(3)AlC_(2) along different crystal planes, providing superior resistance to transgranular fracture;a lower mismatch degree of (Ti,W)_(3)AlC_(2)/Al_(2)O_(3) resulted in stronger interface bonding, resulting in greater resistance to intergranular fracture as well as more balanced stress distributions at different interfaces.

关键词： mechanical properties solid solution MAX phase transmission electron microscopy(TEM) ceramic atomic structure

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Metabolic enzyme inhibitory abilities, in vivo hypoglycemic ability of palmleaf raspberry fruits extracts and identification of hypoglycemic compounds

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Food science and Human Wellness 2023年第4期12卷 1232-1240页

作者： Jun Tan danshu Wang Yu Lu Yehan Wang Zongcai Tu Tao Yuan Lu Zhang National R&D Center for Freshwater Fish Processing Engineering Research Center of Freshwater Fish High-Value Utilization of Jiangxi ProvinceCollege of Life ScienceJiangxi Normal UniversityNanchangJiangxi 330022China

The unripe palmleaf raspberry,namely Fupenzi(FPZ),is an important medicinal and edible *** study aims to evaluate the potential of FPZ extracts prepared with different approaches in attenuating hyperglycemia,gout,Alzheimer’s disease,and pigmentation,to obtain the enriching fraction and to identify the major active *** indicated that FPZ extracts showed weak activity against acetylcholinesterase,considerable ability against tyrosinase and xanthine oxidase,but excellent inhibition onα-***-assisted 40%ethanol extract(40EUS)gave the highest phenolics content,and the bestα-glucosidase inhibition(IC_(50)=0.08μg/mL),which is 877-fold higher than that of positive control *** 40%ethanol eluting fraction of 40EUS showed the strongestα-glucosidase inhibition with the IC_(50) value of 37.79 ng/mL,it could also effectively attenuate the fasting blood glucose level and oral glucose tolerance of C57BL/6 ***-six compounds were identified from 40%ethanol fraction by using HPLC-QTOF-MS/MS,hydrolysable tannins(including 11 ellagitannins and 4 gallotannins)were the major compounds,phenolic acids came to the *** results could provide important technical supporting for the further application and research of FPZ in health foods and drugs against diabetes.

关键词： Pal mleaf raspberry Extraction and identification Enzyme inhibition HPLC-QTOF-MS/MS Hypoglycemic activity

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