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Assessing the impact of conceptual mineral systems uncertainty on prospectivity predictions

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Geoscience Frontiers 2022年第6期13卷 182-207页

作者： Mark D Lindsay Agnieszka M.Piechocka Mark w Jessell Richard Scalzo Jeremie Giraud Guillaume Pirot Edward Cripps Commonwealth Scientific and Industrial Research Organisation Mineral Resources Australian Resources Research CentreWA 6151Australia Mineral Exploration Cooperative Research Centre Centre for Exploration TargetingSchool of Earth SciencesThe University of Western AustraliaPerthWA 6009Australia ARC Centre for Data Analytics for Resources and Environments(DARE) Perth and SydneyAustralia University of Sydney School of Mathematics and StatisticsSydneyAustralia Universitéde Lorraine GeoRessourcesCNRS54000 NancyFrance The University of western Australia Department of Mathematics and StatisticsPerthAustralia

The past two decades have seen a rapid adoption of artificial intelligence methods applied to mineral exploration. More recently, the easier acquisition of some types of data has inspired a broad literature that has examined many machine learning and modelling techniques that combine exploration criteria,or ’features’, to generate predictions for mineral prospectivity. Central to the design of prospectivity models is a ’mineral system’, a conceptual model describing the key geological elements that control the timing and location of economic mineralisation. The mineral systems model defines what constitutes a training set, which features represent geological evidence of mineralisation, how features are engineered and what modelling methods are used. Mineral systems are knowledge-driven conceptual models, thus all parameter choices are subject to human biases and opinion so alternative models are ***, the effect of alternative mineral systems models on prospectivity is rarely compared despite the potential to heavily influence final predictions. In this study, we focus on the effect of conceptual uncertainty on Fe ore prospectivity models in the Hamersley region, western Australia. Four important considerations are tested.(1) Five different supergene and hypogene conceptual mineral systems models guide the inputs for five forest-based classification prospectivity models model.(2) To represent conceptual uncertainty, the predictions are then combined for prospectivity model comparison.(3)Representation of three-dimensional objects as two-dimensional features are tested to address commonly ignored thickness of geological units.(4) The training dataset is composed of known economic mineralisation sites(deposits) as ’positive’ examples, and exploration drilling data providing ’negative’sampling locations. Each of the spatial predictions are assessed using independent performance metrics common to AI-based classification methods and subjected to geological pl

关键词： Uncertainty Modelling Prospectivity Economic geology Geological plausibility Forest-based classification

Continuous conversion of methanol to higher hydrocarbons at ambient pressure

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Journal of Natural Gas Chemistry 2010年第5期19卷 461-462页

作者： william w.Porterfield Gordon M.Zrelak L.Avery Moncure Matthew D.Huff Hampden-Sydney College Pennsylvania State University University Park UNC-Charlotte

An iodozincate ionic liquid solvent and catalyst is used to convert methanol continuously to a wide variety of hydrocarbons at atmospheric pressure.

关键词： methanol conversion zinc iodide hydrocarbon formation

Trilineage Sequencing Reveals Complex TCRβTranscriptomes in Neutrophils and Monocytes Alongside T Cells

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Genomics, Proteomics & Bioinformatics 2021年第6期19卷 926-936页

作者： Tina Fuchs Kerstin Puellmann Chunlin wang Jian Han Alexander w.Beham Michael Neumaier wolfgang E.Kaminski Institute for Clinical Chemistry University of Heidelberg Medical Faculty MannheimD-68167 MannheimGermany Aesculabor Hamburg D-22769 HamburgGermany iRepertoire Inc. HuntsvilleAL 35806USA HudsonAlpha Institute for Biotechnology HuntsvilleAL 35806USA Department of Surgery Hospital of SiegenD-57076 SiegenGermany Ingenium digital diagnostics D-87662 KaltentalGermany

Recent findings indicate the presence of T cell receptor(TCR)-based combinatorial immune receptors beyond T cells in neutrophils and monocytes/*** this study,using a semiquantitative trilineage immune repertoire sequencing approach as well as under rigorous bioinformatic conditions,we identify highly complex TCRβtranscriptomes in human circulating monocytes and neutrophils that separately encode repertoire diversities one and two orders of magnitude smaller than that of T *** transcriptomic analyses reveal that neutrophils,monocytes,and T cells express distinct TCRβrepertoires with less than 0.1%overall trilineage repertoire *** comparison shows that in all three leukocyte lineages,the vast majority of the expressed TCRβvariants are *** also find that differentiation of monocytes into macrophages induces dramatic individual-specific repertoire shifts,revealing a surprising degree of immune repertoire plasticity in the monocyte *** results uncover the remarkable complexity of the two phagocyte-based flexible immune systems which until now has been hidden in the shadow of T cells.

关键词： Monocyte Neutrophil T cell TCRβtranscriptome Next-generation sequencing

Electrocatalytic hydrogen evolution from water at low overpotentials with cobalt complexes supported by redox-active bipyridyl-NHC donors

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Chinese Journal of Catalysis 2022年第12期43卷 3187-3194页

作者： Lizhu Chen Xiaojun Su Jonah w.Jurss Department of Chemistry and Biochemistry University of MississippiUniversityMS 38677USA

Three cobalt complexes bearing tunable,redox-active bipyridyl N-heterocyclic carbene(NHC)-based ligands have been studied for electrocatalytic hydrogen evolution from aqueous *** effect of structural modifications to the ligand framework is investigated across the catalyst series,which includes a non-macrocyclic derivative(1-Co)and 16-(2-Co)and 15-(3-Co)membered macrocycles.A structure-activity relationship is demonstrated,in which the macrocyclic complexes have greater activity compared to their non-macrocyclic counterpart with the most rigid catalyst,supported by the 15-membered macrocycle,performing best ***,3-Co catalyzes H2 evolution from aqueous pH 4 acetate buffer with a Faradaic efficiency of 97%at a low overpotential of 330 *** studies are consistent with formation of a cobalt-hydride species that is subsequently protonated to evolve H2 via a heterolytic pathway.

关键词： Redox-active bipyridyl N-heterocyclic carbene donors Cobalt complex Electrocatalysis water splitting Hydrogen evolution

Surrogate Measures to Assess Mobility of People as a Resilience Indicator in Disaster Management: An Exploratory Study in Southeastern Sri Lanka

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International Journal of Disaster Risk Science 2020年第1期11卷 13-31页

作者： A.M.Aslam Saja Melissa Teo Ashantha Goonetilleke Abdul M.Ziyath K.w.G.Rekha Nianthi Science and Engineering Faculty Queensland University of Technology(QUT)BrisbaneQLD 4001Australia Faculty of Arts University of PeradeniyaPeradeniya 20400Sri Lanka Faculty of Engineering South Eastern University of Sri LankaOluvil 32360Sri Lanka

Understanding social resilience can assist in the formulation of disaster management policies to help communities better prepare for, respond to, and recover from disasters. However, direct social resilience measurement methods such as household surveys are not always a practical option as they are a time-and resource-exhaustive process. Existing measures mainly utilize publicly available census data, which often provide a poor and outdated assessment of current social resilience status. Another limitation includes a failure to capture multiple facets of indicators that are process-oriented and dynamic in nature such as mobility of people. These challenges can be addressed by employing a surrogate approach. Surrogates are alternative measures to depict the target indicator. The surrogate approach can capture key facets of a target indicator, which can be used as potential measures for the target indicator. A framework to conceptualize the surrogate approach is presented, and operationalized using a case study approach on the southeastern coast of Sri Lanka to identify surrogates to measure mobility of people as a resilience indicator. Six higher-order themes were identi-fied as potential surrogates to measure mobility of people in a disaster context. The approach proposed to methodically identify potential surrogates and their measurement protocols can help to improve the current knowledge base and understanding of complex interrelationships of social resilience.

关键词： Community resilience Resilience characteristics Resilience indicators Resilience measurements Social resilience Sri Lanka

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儿童类别学习中知识效应的年龄差异

心理发展与教育 2005年第2期21卷 75-80页

作者：张阔阴国恩王敬欣天津大学职业技术教育学院天津300072 天津师范大学心理与行为研究中心天津300074

采用特征主题的类别学习实验范式,考察了儿童类别学习中知识效应的年龄差异。63名小学4年级学生(年龄范围9～10岁)、65名小学6年级学生(年龄范围11～12岁)和77名初中2年级学生(年龄范围13～14岁)参加了本实验。结果表明:当类别特征能够... 详细信息

采用特征主题的类别学习实验范式,考察了儿童类别学习中知识效应的年龄差异。63名小学4年级学生(年龄范围9～10岁)、65名小学6年级学生(年龄范围11～12岁)和77名初中2年级学生(年龄范围13～14岁)参加了本实验。结果表明:当类别特征能够在已有知识的基础上形成主题时,3个年龄组儿童类别学习的轮次和错误数均显著下降,而且主题突出时,这种趋势更加明显;在统一主题条件下,小学4年级、小学6年级和初中2年级3个年龄组儿童类别学习的轮次和错误数依次减少;而在无主题和突出主题条件下,3个年龄组儿童类别学习的成绩无显著差异。

关键词：年龄差异知识效应类别学习儿童年龄组实验范式显著差异主题年级小学学生初中轮次突出

HIGH TEMPERATURE FATIGUE BEHAVIOUR OF A DIRECTIONALLY SOLIDIFIED COBALT-BASE SUPERALLOY

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Acta Metallurgica Sinica(English Letters) 1998年第2期11卷 111-115页

作者： w.H.JIANG X.D.YAO H.R.GUAN Z.Q.HU Chinese Acad of Sciences Shenyang China

The high temperature high cycle fatigue behaviour of a directionally solidified Co-base superalloy was investigated. The alloy has saperior fatigue resistance at 900℃ and its fatigue strength is up to 295MPa. Its σ-Nf curve is characterized by three distinct zones. The stronger dependence of Nf on or in the high .and low stress zones results from multiple fatigue crock initiation sites produced by high stress and oxidation effect in a prolonged exposure, respectively.

关键词： directional solidification Co-base superalloy fatigue fracture

An overview of recent progress in the development of flexible electrochromic devices

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Nano Materials Science 2023年第4期5卷 369-391页

作者： Bin wang wu Zhang Feifei Zhao william w.Yu Abdulhakem Y.Elezzabi Linhua Liu Haizeng Li Optics and Thermal Radiation Research Center Institute of Frontier&Interdisciplinary ScienceShandong UniversityQingdao266237China School of Chemistry&Chemical Engineering Shandong UniversityJinan250100China Ultrafast Optics and Nanophotonics Laboratory Department of Electrical and Computer EngineeringUniversity of AlbertaEdmontonAlbertaT6G 2V4Canada

Electrochromic materials are capable of reversibly switching their colors or optical properties through redox reactions under applied voltages,which have shown great potential applications including smart windows,nonemissive displays,optical filters,among *** the current rigid electrochromic devices have shown emerging interest and developed rapidly,many applications(e.g.,wearable/deformable optoelectronics)are blocked due to their inflexible ***,the adaption of rigid electrochromic devices to flexible ones is of particular interest for the new era of smart *** this review,the current state-of-the-art achievements of flexible electrochromic devices(FECDs)are highlighted,along with their design strategies and the choice of electrochromic *** recent research progress of FECDs is reviewed in detail,and the challenges and corresponding solutions for real-world applications of FECDs are ***,we summarize the basic fabrication strategies of FECDs and their potential *** addition,the development trend,the perspectives,and the outlook of FECDs are discussed at the end of this Review,which may provide recommendations and potential directions to advance the practical applications of FECDs.

关键词： Electrochromism Flexible electrochromic devices Optoelectronics Optical materials

Novel Isatin-Schiff Base Cu (II) and Ni(II) Complexes. X-ray Crystal Structure of Bis[3-(4-hexylphenylimino)-1H-indol-2(3H)-one]-dichlorocopper(II) Complex

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Chinese Chemical Letters 2006年第2期17卷 243-246页

作者： Ayse ERCAG Sema Oztürk YILDIRIM Mehmet AKKURT Mahmure Ustün OZGUR Frank w. HEINEMANN Istanbul University Engineering Faculty Chemistry Department Avcilar Istanbul Turkey 34320 Department of Physics Faculty of Arts and Sciences Erciyes University Kayseri Turkey 38039 Yildiz Technical University Faculty of Arts and Sciences Chemistry Department Davutpasa Istanbul Turkey 34210 Institut für Inorganische Chemie UniversittErlangen-Nürnberg Egerlandstrasse 1 D-91058 Erlangen Germany

Schiff base ligand （HL） derived from 4-hexylaniline with isatin （1H-indole-2,3-dione） and its complexes with Cu（Ⅱ）, Ni（Ⅱ） were prepared and characterized by analytical, spectroscopic （IR, UV-Vis, Mass） techniques, electrical conductivity, magnetic and thermal measurements. The crystal and molecular structure of [Cu（HL）2Cl2] was determined by a single-crystal X-ray diffraction study. The molecular structure of the title compound has an inversion center on the Cu atom.

关键词： Mononuclear Cu(Ⅱ) and Ni(Ⅱ) complexes isatin-anilines Schiff base crystal structure.