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Analyzing the Interplay of Sintering Conditions on Microstructure and Hardness in Indirect Additive Manufacturing of 17-4PH Stainless Steel

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Acta Metallurgica Sinica(English Letters) 2024年第9期37卷 1611-1620页

作者： Erika Lannunziata Mohammad Hossein Mosallanejad Manuela Galati Gabriele Piscopo Abdollah Saboori Integrated Additive Manufacturing Center Department of Management and Production EngineeringPolitecnico di TorinoCorso Duca Degli Abruzzi 2410129TurinItaly

Indirect additive manufacturing(AM)methods have recently attracted attention from researchers thanks to their great potential for cheap,straightforward,and small-scale production of metallic *** diffusion additive manufacturing(ADAM),a variant of indirect AM methods,is a layer-wise indirect AM process recently developed based on fused deposition modeling and metal injection ***,there is still limited knowledge of the process conditions and material properties fabricated through this process,where sintering plays a crucial role in the final consolidation of ***,this research,for the first time,systematically investigates the impact of various sintering conditions on the shrinkage,relative density,microstructure,and hardness of the 17-4PH ADAM *** this reason,as-washed samples were sintered under different time-temperature *** sample density was evaluated using Archimedes,computed tomography,and image analysis *** outcomes revealed that sintering variables significantly impacted the density of brown 17-4PH Stainless Steel *** results indicated more than 99% relative densities,higher than the value reported by Markforged Inc.(~96%).Based on parallel porosities observed in the computed tomography results,it can be suggested that by modifying the infill pattern during printing,it would be possible to increase the final relative *** microhardness of the sintered samples in this study was higher than that of the standard sample provided by Markforged *** at 1330℃ for 4 h increased the density of the printed sample without compromising its mechanical *** to X-ray diffraction analysis,the standard sample provided by Markforged ***“1330℃—4 h”one had similar stable phases,although copper-rich intermetallics were more abundant in the microstructure of reference *** study is expected to facilitate the adoption of indirect metal AM methods by different sector

关键词： Indirect additive manufacturing Atomic diffusion additive manufacturing 17-4PH stainless steel Computed tomography Sintering

Energy Disaggregation of Industrial Machinery Utilizing Artificial Neural Networks for Non-intrusive Load Monitoring

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Energy and AI 2024年第3期17卷 342-356页

作者： Philipp Pelger Johannes Steinleitner Alexander Sauer Fraunhofer Institute for Manufacturing Engineering and Automation IPA Stuttgart 70569Germany Institute for Energy Efficiency in production(EEP) University of StuttgartStuttgart 70569Germany

This paper explores the application of non-intrusive load monitoring techniques in the industrial sector for disaggregating the energy consumption of machinery in manufacturing processes. With an increasing focus on energy efficiency and decarbonization measures, achieving energy transparency in production becomes crucial. Utilizing non-intrusive load monitoring, energy data analysis and processing can provide valuable insights for informed decision-making on energy efficiency improvements and emission reductions. While non-intrusive load monitoring has been extensively researched in the building and residential sectors, the application in the industrial manufacturing domain needs to be further explored. This paper addresses this research gap by adapting established non-intrusive load monitoring techniques to an industrial dataset. By employing artificial neural networks for energy disaggregation, the determination of energy consumption of industrial machinery is made possible. Therefore, a generally applicable cross-energy carrier method to disaggregate the energy consumption of machinery in manufacturing processes is developed using a design science research approach and validated through a practical case study utilizing a compressed air demonstrator. The results show that the utilization of artificial neural networks is well-suited for energy disaggregation of industrial data, effectively identifying on and off states, multi-level states and continuously variable states. Non-intrusive load monitoring should be further considered in the research of emerging artificial intelligence technologies in energy consumption evaluation. It can be a viable alternative for intrusive load monitoring and is a prerequisite to installing energy meters for every machine.

关键词： Non-intrusive load monitoring Energy transparency Energy consumption evaluation Industrial manufacturing Artificial neural networks

Air renewal times and ventilation rate calculations for underground workings using radioactive measurement

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International Journal of Mining Science and Technology 2016年第5期26卷 843-850页

作者： Ayman A.El-Abnoudy Sayed F.Hassan production sector Nuclear Materials Authority

Potential alpha emitters are of prime concern to the ventilation engineer due to their rapid concentration increasing once radon released in the mine atmosphere, causing tissue irradiation and lung *** of the time based variations of the natural ventilation in tunnels and their relationship to the external parameters contribute to the air circulation assessment. Due to the continuous and high fluctuation of the meteorological conditions affecting the air circulation and intensity through the underground workings, there is a difficulty in the natural ventilation assessment by only the ordinary meteorological measurements. So, in this paper, the possibility of using the radioactive measurements, allowing for the air aging and ventilation quality to be qualified, is investigated through three different underground structures. Referring to the most confined structure of them, results show that one structure has a better exchange rate by a factor 1.8 and the other has the best rate by a factor 2.1. This parameter can be linked to the operating costs and size of a future ventilation system.

关键词： Mining ventilation Air circulation Radon gas measurement Air aging

Improving the nutritional values of yellow mealworm Tenebrio molitor(Coleoptera: Tenebrionidae) larvae as an animal feed ingredient: a review

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Journal of Animal Science and Biotechnology 2024年第1期15卷 35-52页

作者： Linggawastu Syahrulawal Magnhild Oust Torske Rumakanta Sapkota Geir Næss Prabhat Khanal Animal Science Production and Welfare DivisionFaculty of Biosciences and AquacultureNord UniversitySkolegata 22Steinkjer 7713Norway Department of Environmental Science Faculty of Technical SciencesAarhus UniversityFrederiksborgvej 399Roskilde 4000Denmark

Yellow mealworm larvae(YML;Tenebrio molitor) are considered as a valuable insect species for animal feed due to their high nutritional values and ability to grow under different substrates and rearing conditions. Advances in the understanding of entomophagy and animal nutrition over the past decades have propelled research areas toward testing multiple aspects of YML to exploit them better as animal feed sources. This review aims to summarize various approaches that could be exploited to maximize the nutritional values of YML as an animal feed ingredient. In addition, YML has the potential to be used as an antimicrobial or bioactive agent to improve animal health and immune function in production animals. The dynamics of the nutritional profile of YML can be influenced by multiple factors and should be taken into account when attempting to optimize the nutrient contents of YML as an animal feed ingredient. Specifically, the use of novel land-based and aquatic feeding resources, probiotics, and the exploitation of larval gut microbiomes as novel strategies can assist to maximize the nutritional potential of YML. Selection of relevant feed supplies, optimization of ambient conditions, the introduction of novel genetic selection procedures, and implementation of effective post-harvest processing may be required in the future to commercialize mealworm production. Furthermore, the use of appropriate agricultural practices and technological improvements within the mealworm production sector should be aimed at achieving both economic and environmental sustainability. The issues highlighted in this review could pave the way for future approaches to improve the nutritional value of YML.

关键词： Alternative protein source Feed application Nutritional value Yellow mealworm

Energy-growth nexus for‘Renewable Energy Country Attractiveness Index’countries:Evidence from new econometric methods

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Geoscience Frontiers 2024年第3期15卷 298-311页

作者： Mandeep Mahendru Aviral Kumar Tiwari Gagan Deep Sharma Solomon Nathaniel Mansi Gupta Szechenyi Istvan University GyorHungary Indian Institute of Management BodhgayaIndia University School of Management Studies Guru Gobind Singh Indraprastha UniversitySector 16 CDwarkaNew DelhiIndia Department of Economics University of LagosAkokaNigeria Centre for Financial Innovation S P Jain Institute of Management and ResearchMumbaiIndia

This study explores the connections between renewable energy consumption(REC),non-renewable energy consumption(NREC),gross fixed capital formation(GFCF),the labor force(LF),and economic growth(GDP)in Renewable Energy Country Attractiveness Index(RECAI)countries for *** quantify the nexus between REC,NREC,and GDP while utilizing a production model framework and including the measures of labor and capital,for suggesting a phase-wise strategy to attain the sustainable development *** use robust methodologies including Lagrange Multiplier(LM)panel unit root tests with trend shifts,Westerlund cointegration test,LM bootstrap technique for cointegration with breaks,continuously updated fully modified(CUP-FM)and continuously updated bias-corrected(CUPBC)estimators,Augmented Mean Group(AMG)approach,fully modified ordinary least squares,dynamic ordinary least squares,Canonical Cointegrating Regression(CCR),and panel causality test proposed by Canning&*** compute non-parametric time-varying coefficients with fixed effects for seeing the impact of GFCF,LF,REC,and NREC on *** results press upon policymakers to shift toward clean energy and REC for attaining the environmental goals(SDGs 6,7,13,and 15)and the economic goals(SDGs 1,2,8,and 10).While this shift would help developed economies,which have already attained the economic goals,to progress on the front of environmental goals,it would enable developing countries to progress on both fronts in a balanced manner.

关键词： Renewable energy consumption Economic growth Non-renewable energy consumption CUP-BC CUP-FM Time-varying coefficients with fixed effects

production and achievements of Sesamum indicum industry in the world:Past and current state

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Oil Crop Science 2024年第3期9卷 187-197页

作者： Gazali B.T.A.Sanni Vincent Ezin Ifagbémi Bienvenue Chabi Antoine Abel Missihoun Quenum Florent Zangui Hamissou Mareme Niang Adam Ahanchede Department of Crop production Faculty of Agricultural SciencesUniversity of Abomey-Calavi01BP 526CotonouBenin Laboratory of Valorization and Quality Management of Food Bio-Ingredients Faculty of Agricultural SciencesUniversity of Abomey-Calavi01BP 526CotonouBenin Laboratory of Genetic and Biotechnology Faculty of Sciences and TechnologyUniversity of Abomey-CalaviBP 526CotonouBenin Department of Vegetal production Abdou Moumouni UniversityFaculty of AgronomyBP:10960Niamey-Niger ISRA-CERAAS Thies-EscaleThiesBP 3320Senegal

Sesame production is important in agriculture,food industry,and the crop diversity due to its rich nutritional profile and health *** its significant value,sesame is still an orphan crop that has received little scientific attention,resulting in low yield compared to other major oilseed *** review offers a comprehensive overview of the present state of production,knowledge,and research advancements concerning Sesamum indicum on a global *** FAOSTAT database was extensively used to examine the global trends from 1961 to *** the past 60 years,global sesame production has substantially increased,with Asia and Africa being the primary *** integration of omics technologies and biotechnological interventions has revolutionized our understanding of the genetic basis of sesame,enhanced productivity,invigorated stress resilience,and improved seed ***-throughput sequencing methods such as RNA-seq,RAD-seq,SLAF-seq,and GBS technology are used in various studies,linkage mapping,and identification of trait-associated *** linkage maps,and multi-omics studies such as genomics,proteomics,transcriptomics,and metabolomics have been employed in sesame research for gene and QTL *** and metabolic pathways related to oil content,yield,and stress tolerance were *** and QTLs related to yield and its components,drought,salt,and osmotic stress tolerance were *** genes associated with capsule shattering and seed shattering were recently *** more achievement in sesame,it is important to enhance sesame production efficiency through mechanization,advanced agricultural practices,and knowledge dissemination to *** and multi-omics integration should be particularly *** advancements in sesame production present a significant and promising opportunity for farmers,governments,and stakeholders in the agricultural sector.

关键词： Sesamum indicum Oil yield Genetic markers Sesame industry Omics improvement

Decoding the fish genome opens a new era in important trait research and molecular breeding in China

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Science China(Life Sciences) 2024年第10期67卷 2064-2083页

作者： Qian Zhou Jialin Wang Jiongtang Li Zhangfan Chen Na Wang Ming Li Lei Wang Yufeng Si Sheng Lu Zhongkai Cui Xuhui Liu Songlin Chen State Key Laboratory of Mariculture Biobreeding and Sustainable Goods Yellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdaoShandong 266071China Laboratory for Marine Fisheries Science and Food production Processes Qingdao Marine Science and Technology CenterQingdaoShandong 266237China Key Laboratory of Aquatic Genomics Ministry of Agriculture and Rural AffairsBeijing Key Laboratory of Fishery BiotechnologyChinese Academy of Fishery SciencesBeijing 100041China

Aquaculture represents the fastest-growing global food production sector,as it has become an essential component of the global food *** has the world's largest aquaculture industry in terms of production ***,the sustainable development of fish culture is hindered by several concerns,including germplasm degradation and disease *** practice of genomic breeding,which relies heavily on genome information and genotypephenotype relationships,has significant potential for increasing the efficiency of aquaculture *** 2014,the completion of the genome sequencing and annotation of the Chinese tongue sole signified the beginning of the fish genomics era in *** then,domestic researchers have made dramatic progress in functional genomic *** date,the genomes of more than 60 species of fish in China have been assembled and *** on these reference genomes,evolutionary,comparative,and functional genomic studies have revolutionized our understanding of a wide range of biologically and economically important traits of fishes,including growth and development,sex determination,disease resistance,metamorphosis,and ***,genomic tools and breeding techniques such as SNP arrays,genomic selection,and genome editing have greatly accelerated genetic improvement through the incorporation of functional genomic information into breeding *** review aims to summarize the current status,advances,and perspectives of the genome resources,genomic study of important traits,and genomic breeding techniques of fish in *** review will provide aquaculture researchers,fish breeders,and farmers with updated information concerning fish genomic research and breeding *** summary will help to promote the genetic improvement of production traits and thus will support the sustainable development of fish aquaculture.

关键词： fish genomics economic traits genomic selection genome editing genomic breeding

Observability of parameter space for charged Higgs boson in its bosonic decays in two Higgs doublet model Type-1

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Chinese Physics C 2024年第2期48卷 57-65页

作者： Ijaz Ahmed Waqas Ahmad M.S.Amjad Jamil Muhammad Federal Urdu University of Arts Science and TechnologyIslamabad Pakistan Riphah International University Sector I-14Hajj ComplexIslamabad Pakistan National University of Technology Islamabad Pakistan Sang-Ho College and Department of PhysicsKonkuk UniversitySeoul 05029South Korea

This study explores the possibility of discovering H±through its bosonic decays,i.e.,H±→W±φ(whereφ=h or A),within the Type-I two Higgs doublet model(2HDM).The main objective is to demonstrate the available parameter space after applying recent experimental and theoretical exclusion *** suggest that mH±=150 GeV is the most probable mass for the H±→W±φdecay channel in pp collisions at s1/2=8,13,and 14 *** also report on the application of a modern machine learning approach to a multivariate technique for heavy charged Higgs production in association with a single top quark through weak interaction to demonstrate its observability in comparison with the most relevant Standard Model backgrounds using the neural networks of boosted decision Tree(BDT),likelihood(LH),and multilayer perceptron(MLP).

关键词： charged Higgs MSSM LHC

Maximizing the exploitation of phosphogypsum wastes using soaking technique with citric acid, recovering rare-earth and residual phosphate contents

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Journal of Central South University 2022年第12期29卷 3896-3911页

作者： Ahmed Atef ELIWA Amal Essam MUBARK Nasr Abelaziz ABDELFATTAH Ebrahim Abd El GAWAD production sector Nuclear Materials AuthorityP.O.Box 530 El-MaadiCairoEgypt

Phosphogypsum(PG), the main by-product of phosphoric acid production industries, is considered one of the most important secondary sources of rare earth elements(REEs). The current study focuses on the recovery of REEs content and the residual phosphate content existing in the PG with preserving on the CaSO_(4)skeleton to be used in other various applications. These attainments are carried out using citric acid leaching process via soaking technique. Several dissolution parameters for REEs using citric acid were studied, including soaking time, soaking temperature, citric acid concentration, solid-to-liquid ratio, and recycling of the citrate leaching solutions in the further REEs dissolution experiments. The best-operating conditions were 14 d of soaking time, 7.5% citric acid concentration, and the solid-toliquid ratio of 1/5 at ambient temperature. About 79.57% dissolution efficiency of REEs was achieved using the optimal conditions. Applying four soaking stages by mixing different fresh PG samples with the same citrate solution sequentially, cumulative dissolution efficiency for REEs was found to be 64.7% under optimal soaking conditions. REEs were recovered using Dowex 50X8 resin from citrate solutions with 96% extraction efficiency. Dissolution kinetics proved the pseudo-first-order nature, reversible reactions, and two activation energies for all REEs.

关键词： phosphogypsum rare earths citric acid dissolution soaking Dowex 50X8 pre-concentration