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Anthropogenic mineral generation and its potential resource supply:The case of niobium

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Science China Earth Sciences 2024年第8期67卷 2583-2591页

作者： Xianlai ZENg Moisés gómez Mahmoud BAKRY Yong gENg Jinhui LI School of Environment Tsinghua UniversityBeijing 100084China School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of International and Public Affairs Shanghai Jiao Tong UniversityShanghai 200030China

The strategy of carbon neutrality is reshaping the global landscape of resource flow and *** the final sink of geological minerals,the proliferated anthropogenic minerals,also called secondary resources,play an increasingly important role in resource supply *** is a critical metal that lacks full concern for its *** fundamental principle of niobium circularity is to recycle and maintain the material as close to the manufacturing process as *** we estimate the niobium-containing applications lost at their end-of-life,underscoring the imperative to minimize such ***,we elucidate the extraction processes for scrap and alloy quantities throughout the industry's *** from anticipated waste generated by the majority of niobium applications,a forecast indicates a potential loss of approximately 168 kt by 2090 in the absence of ***,with a recycling efficiency of 90%for niobium,the projected loss diminishes to approximately 16 *** delve into the significance of niobium's circular economy and explore various aspects that demand further investigation for a seamless transition from linear to circular practices.

关键词： Niobium Anthropogenic mineral Circular economy Recycling Sustainability

Modeling mitochondria,where are the numbers?

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Neural Regeneration Research 2024年第7期19卷 1435-1436页

作者： Adrian M.Davies Alan g.Holt University Center Shrewsbury ShrewsburyShropshireUK

Models and simulations are particularly useful for exploring ideas and concepts in the biological sciences that are expe rimentally *** silico methods are also gaining acceptance with regulatory authorities as an alte... 详细信息

关键词： eliminate authorities acceptance

Effects of frothers on bubbles size and flotation performance of hydrophobic minerals

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Journal of Central South University 2024年第7期31卷 2280-2299页

作者： gülşah gÜVEN Berivan TUNÇ Ş.Beste AYDIN gülay BULUT Mineral Processing Engineering Department Faculty of MinesIstanbul Technical UniversityMaslak 34469IstanbulTurkey Research Center Metso OutotecKuparitie 1028101 PoriFinland

Frothers facilitate the reduction of bubbles size by preventing bubbles coalescence and produce more stable *** collision probability of the bubbles and particles substantially increases by decreasing bubble *** the same volume system,fewer bubbles result from a distribution of large-sized bubbles,and more bubbles result from a distribution of small-sized *** this research,fundamental two-phase frother characterization parameters were aimed to link with three-phase coal and talc flotation *** this purpose,the effect of single and dual frother systems on inhibiting bubble coalescence was investigated with methyl isobutyl carbinol(MIBC),isooctanol(2 ethyl hexanol),pine oil,and Dowfroth *** on the results of single frothers,isooctanol at the lowest critical coalescence concentration(CCC)value of 6×10^(−6) achieved the smallest bubbles with Sauter mean diameter of 0.80 *** blending Dowfroth 250 and pine oil,the bubbles size decreased significantly,reaching 0.45 *** the highest recoveries in coal flotation were obtained in single and frother blends where the bubbles size was measured as the smallest in two-phase system,and such a relationship was not found for talc flotation.

关键词： flotation frother blends bubble size coal and talc flotation

A remarkable decade of learning and sharing knowledge through the Journal of Palaeogeography(JoP)(2014-2024):Reminiscences from an Associate Editor-in-Chief

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Journal of Palaeogeography 2024年第4期13卷 1029-1040页

作者： g.Shanmugam Department of Earth and Environmental Sciences The University of Texas at Arlington

In this editorial, an Associate Editor-in-Chief of the Journal of Palaeogeography(JoP) reminisces his publication experience in JoP during the period 2014-2024. 1) During a period of nine years, he contributed eight review articles, three discussions, two replies, one book review, one glossary, and one tribute to the first Editor-in-Chief Prof. Zeng-Zhao Feng. His contributions totaled 534 printed pages. 2) His contributions examined 19 different domains, such as landslides, submarine fans, seismites, SSDS, hyperpycnites, rivers,etc. 3) His contributions coincided with the formative years of JoP. 4) The impact of his articles is evident from the Stats published by Researchgate. For example, his review article “The Landslide Problem” has reached11,611 Reads and 186 Citations after nine years of publication in 2015. 5) In 2023, the CNKI(China National Knowledge Infrastructure) recognized his article “Submarine fans: a critical retrospective(1950-2015)” as the Top-1% most-highly cited publications in the Journal of Palaeogeography published during a 10-year survey period: 2012-2022. 6) He was inducted as a Founding Member of the International Society of Palaeogeography(ISP) at Changping District of China University of Petroleum(Beijing), Beijing on July 16, 2022. 7) His JoP editorship during the past 10 years has been the most challenging, inspiring, and rewarding experience of his global scientific journey spanning over six decades(1962-2024).

关键词： Journal of Palaeogeography Associate Editor-in-Chief Editorial Landslides Submarine fans Seismites SSDS Hyperpycnites Zeng-Zhao Feng

Chatter prediction for uncertain parameters

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Advances in Manufacturing 2018年第3期6卷 319-333页

作者： Michael Loser Andreas Otto Steffen Ihlenfeidt günter Radons Institute of Machine Tools and Control Engineering TU Dresden 01069 Dresden Germany Institute of Physics Chemnitz University of Technology09107 Chemnitz Germany

The occurrence of chatter in milling processeswas investigated in this study. The prediction of the sta-bility lobes of metal cutting processes requires a model ofthe cutting force and a model of the dynamic machine toolbehavior. Parameter uncertainties in the models may leadto significant differences between the predicted and mea-sured stability behavior. One approach towards robuststability consists of running a large number of simulationswith a random sample of uncertain parameters and deter-mining the confidence levels for the chatter vibrations,which is a time-consuming task. In this paper, an efficientimplementation of the multi frequency solution and theconstruction of an approximate solution is presented. Theapproximate solution requires the explicit calculation of themulti frequency solution only at a few parameter points,and the approximation error can be kept small. This studyfound that the calculation of the robust stability lobe dia-gram, which is based on the approximate solution, is sig-nificantly more efficient than an explicit calculation at allrandom parameter points. The numerically determinedrobust stability diagrams were in good agreement with theexperimentally determined stability lobes.

关键词： Milling Chatter Uncertainties Vibration Stability

AN AUgMENTED BV SETTINg FOR FEEDBACK SWITCHINg CONTROL

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Journal of Systems Science & Complexity 2010年第3期23卷 456-466页

作者： Falk M.HANTE günter LEUgERINg Thomas I.SEIDMAN Department Mathematik Lehrstuhl für Angewandte Mathematik ⅡUniversitt Erlangen-Nürnberg Department of Mathematics and Statistics University of Maryland Baltimore County

This paper considers dynamical systems under feedback with control actions limited *** authors wish to understand the closed-loop systems as approximating multi-scale problemsin which the implementation of switching merely acts on a fast *** hybrid dynamicalsystems are extensively studied in the literature,but not much so far for feedback with partial *** becomes in particular relevant when the dynamical systems are governed by partialdifferential *** authors introduce an augmented BV setting which permits recognition ofcertain fast scale effects and give a corresponding well-posedness result for observations with such *** an application for this setting,the authors show existence of solutions for systemsof semilinear hyperbolic equations under such feedback with pointwise observations.

关键词： Feedback functions of bounded variation hybrid dynamical systems partial state observation switching control.

Nomograms and prognosis for superficial esophageal squamous cell carcinoma

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World Journal of gastroenterology 2024年第10期30卷 1291-1294页

作者： Hong Tao Lin Ahmed Abdelbaki Somashekar g Krishna Department of Internal Medicine Division of GastroenterologyHepatology and NutritionThe Ohio State University Wexner Medical CenterColumbusOH 43210United States

In recent years,endoscopic resection,particularly endoscopic submucosal dis-section,has become increasingly popular in treating non-metastatic superficial esophageal squamous cell carcinoma(ESCC).In this evolving paradigm,it is crucial to identify factors that predict higher rates of lymphatic invasion and poorer *** tumor size,deeper invasion,poorer differentiation,more infiltrative growth patterns(INF-c),higher-grade tumor budding,positive lymphovascular invasion,and certain biomarkers have been associated with lymph node metastasis and increased morbidity through retrospective reviews,leading to the construction of comprehensive nomograms for outcome *** validated by future prospective studies,these nomograms would prove highly applicable in guiding the selection of treatment for superficial ESCC.

关键词： Esophageal cancer Esophageal squamous cell carcinoma Esophageal resection Endoscopic mucosal resection Endoscopic submucosal dissection Lymph node metastasis

Advancements,strategies,and prospects of solid oxide electrolysis cells(SOECs):Towards enhanced performance and large-scale sustainable hydrogen production

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Journal of Energy Chemistry 2024年第7期94卷 688-715页

作者： Amina Lahrichi Youness El Issmaeli Shankara S.Kalanur Bruno g.Pollet green Hydrogen Lab(gH2Lab) Hydrogen Research Institute(HRI)Universitédu QuébecàTrois-Rivières(UQTR)3351 boulevard des ForgesTrois-RivièresQuébec G9A 5H7Canada

Solid oxide electrolysis cells(SOECs)represent a crucial stride toward sustainable hydrogen generation,and this review explores their current scientific challenges,significant advancements,and potential for large-scale hydrogen *** SOEC technology,the application of innovative fabrication tech-niques,doping strategies,and advanced materials has enhanced the performance and durability of these systems,although degradation challenges persist,implicating the prime focus for future *** we provide in-depth analysis of the recent developments in SOEC technology,including Oxygen-SOECs,Proton-SOECs,and ***,Hybrid-SOECs,with their mixed ionic conducting electrolytes,demonstrate superior efficiency and the concurrent production of hydrogen and *** with the capacity to harness waste heat,these advancements in SOEC technology present signif-icant promise for pilot-scale applications in *** review also highlights remarkable achieve-ments and potential reductions in capital expenditure for future SOEC systems,while elaborating on the micro and macro aspects of sOECs with an emphasis on ongoing research for optimization and *** concludes with the potential of SOEC technology to meet various industrial energy needs and its significant contribution considering the key research priorities to tackle the global energy demands,ful-fillment,and decarbonization efforts.

关键词： Solid oxide electrolysis cells Proton-SOECs Oxygen-SoECs Hybrid-SOECs Intermediate-high temperature electrolysers Hydrogenproduction

Beyond fossil:the synthetic fuel surge for a green-energy resurgence

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Clean Energy 2024年第5期8卷 1-18页

作者： Sreejaun Thothaathiri Janaki Dinesh Kumar Madheswaran g.Naresh Thangavelu Praveenkumar Electric Vehicle Technology Laboratory Department of Automobile EngineeringSRM Institute of Science and TechnologyKattankulathur CampusTamilnadu 603203India

This review offers a comprehensive overview of synthetic fuels as promising alternatives to conventional fossil *** carbon-neutral potential of synthetic fuels when produced using renewable energy and captured CO_(2),offering significant opportunities to mitigate CO_(2) emissions,is ***,the efficiency of synthetic fuels is presented,as they do not require dedicated agricultural land or substantial water resources,addressing concerns related to the land-use change and water scarcity associated with traditional *** economic viability of synthetic fuels is explored,highlighting the advancements in technology and decreased renewable-energy costs,coupled with their independence from food crops,mitigating concerns about potential impacts on food *** investments by industry leaders such as Porsche,Highly Innovative Fuels global,and ExxonMobil,totalling$1 billion,aimed at achieving an annual production of 550 million litres by 2026,are covered in *** study is further extended by emphasizing the scalability of synthetic fuel production through modular processes,enabling tailored facilities to meet regional demands and contribute to a decentralized and resilient energy ***,the‘drop-in’nature of synthetic fuels that are seamlessly compatible with existing fuel storage,pipelines,and pumps,facilitating a smooth transition without requiring extensive infrastructure changes,is *** such as the current high cost of synthetic fuel production are acknow-ledged,necessitating supportive government policies and incentives for widespread ***,synthetic fuels have emerged as promising contenders in the pursuit of sustainable and adaptable energy solutions,with tangible benefits for the environment,economy,and existing energy infrastructure.

关键词： synthetic fuels biofuels carbon neutrality sustainable energy e-fuel ‘drop-in’nature