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Electrochemical Reaction Processes of niobium Ions in FLInAK melt

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International journal of Minerals,Metallurgy and Materials 1999年第2期13卷 83-89页

作者： Wang, Xindong Duan, Shuzhen Christensen, E. Bjerrum, n.j. Ito, Y. Metallurgy School University of Science and Technology Beijing Beijing 100083 China Materials Science Group Chemistry Department A Technical University of Denmark DK-2800 Lyngby Denmark Department of Energy Science and Engineering Kyoto University Kyoto 606 Japan

ThecathodicProcessmechanismofniobiumreductionfromchloride-fluorideandfiuoridemeltshasbeenstudiedindetail[l-],batth***,threehoesofmodelshaVebeenPutforwardtoexplaintheelectrochemic... 详细信息

ThecathodicProcessmechanismofniobiumreductionfromchloride-fluorideandfiuoridemeltshasbeenstudiedindetail[l-],batth***,threehoesofmodelshaVebeenPutforwardtoexplaintheelectrochemic...

关键词： electrochemistry molten Salt FLInAK niobium reduction

Gas Chromatography Analysis of Resin and Fatty Acids from Laboratory Generated Bleach Plant Effluents

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中国造纸 2007年第5期26卷 29-33页

作者： Chhaya Sharma S. Mohanty S. Kumar n.j. Rao Department of Paper Technology llT-Roorkeelndia Gas Authority of India Ltd. Calcutta India jP Institute Gunna India

Laboratory generated spent bleached liquor from the chlorination, caustic extraction stage of mixed wood kraft pulp processing has been analyzed both qualitatively and quantitatively for various resin & fatty acids by using GC. A number of resin acids, saturated and unsaturated fatty acids, chloro fatty and resin acid have been detected and their concentrations are estimated. The results are compared with results on different agriculture residue/hardwood pulps, which were reported earlier. The concentrations of various compounds detected have also been compared with their reported LC50 values.

关键词：气相色谱分析脂肪酸树脂酸漂白废液

Determination of Oxide in FLInAK Melt by Electrochemical Titration Technique

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Rare Metals 1993年第2期12卷 97-102页

作者：王新东段淑贞 Christensen E. Von Barner j.H. Bjerrum n.j. University of Science and Technology Beijing Beijing 100083China The Technical University of Denmark DK-2800 LyngbyDenmark

The use of K2nbF7 as a probe solute for the cyclic voltammetric determination of oxide in FLInAK melts was studied and demonstrated. This method is based on a complex reaction and the peak current density of nbF72- reduction. The reaction constant was determined to be very large at 973 K. A cyclic voltammetric standard addition experiment was also employed to determine the amount of oxide in FLnAK melt. The oxide content of FLInAK melts is equal to the amount of nb(V) added minus the amount of nbF72- which is obtained from the voltammogram.

关键词： Electrochemistry Liquid metals niobium Oxides Titration

Zircon Senstive High Resolution Ion Microprobe (SHRIMP) study of granitoid intrusions in Zhaoye Gold Belt of Shandong Province and its implication

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Science China Earth Sciences 1997年第4期40卷 361-369页

作者：苗来成罗镇宽黄佳展关康 n.j. Mcnaughton D. I. Groves Tianjin Geological Academy Ministry of Metallurgical Industry Tianjin 300061 China Key Centre for Strategic Mineral Deposits Department of Geology & Geophysics University of Western Australia Nedlands W.A. 6907 Australia

The zircon Sensitive High Resolution Ion Microprobe (SHRIMP) results show that granitoid intrusions in Zhaoyc Gold Belt were emplaced at two periods of Mesozoic: Linglong and Luanjiahe types of granitic intrusions were emplaced between 160 Ma and 150 Ma (late jurassic); Guojialing type of granodioritic intrusions, 130 Ma and 126 Ma (early Cretaceous). All the three types contain at least two major generations of inherited zircons with Precambrian ( >650 Ma) and early Mesozoic ages (200-250 Ma), respectively. The former suggests that these plu-tonic rocks are of crustal origin and that Precambrian basement with component of sialic crust up to 3.4 Ga old ( Middle Archean) exists in the region. The presence of abundant inherited zircons with early Mesozoic age indicates that the Precambrian basement was affected by a major tectono-thermal event, that is the collision of the north and South China blocks, at 250 Ma to 200 Ma. SHRIMP results also indicate that the gold mineralization in the region took place between 126 Ma and 120 Ma.

关键词： Zhaoye Gold Belt granitic intrusion. SHRIMP magmatic zircon inherited zircon

Survey of Robotics in Education, Taxonomy, Applications, and Platforms during COVID-19

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Computers, Materials & Continua 2021年第4期67卷 687-707页

作者： Hussain A.Younis A.S.A.Mohamed R.jamaludin M.n.ab Wahab College of Education for Women University of Basrah BasrahIraq School of Computer Sciences Universiti Sains MalaysiaMinden11800PenangMalaysia Centre For Instructional Technology&Multimedia Universiti Sains MalaysiaMinden11800PenangMalaysia

The coronavirus disease 2019(COVID-19)is characterized as a disease caused by a novel coronavirus known as severe acute respiratory coronavirus syndrome 2(SARS-CoV-2;formerly known as 2019-nCoV).In December 2019,COVID-19 began to appear in a few *** the beginning of 2020,it had spread to most countries across the *** is when education challenges began to *** COVID-19 crisis led to the closure of thousands of schools and universities all over the *** a situation requires reliance on e-learning and robotics education for students to continue their studies to avoid the mingling between people and *** relation to this alternative learning solution,the present study was conducted.A systematic literature review on educational robotics(ER)keywords between 2015–2020 was carried out for the purpose to review a total of 2253 articles from the selected sources;Scopus(452),Taylor&Francis(311),Science Direct(427),IEEE Xplore(221),and Web of Science(842).This review procedure was labelled as Taxonomy *** ltering Taxonomy 1,it was found that 98 scientic articles formed the so-called Taxonomy II that was categorized into six categories:(i)Robotics concepts,(ii)Device,(iii)Robotic applications,(iv)Manufacturing robots,(v)Robotics analysis,and(vi)Education/*** this study,only 35 articles in this specic eld were selected,of which were then assigned into three categories:(i)Application,(ii)Platform,and(iii)*** results show that the application category carries 17.4%,platform 20%,and education 22.85%.This study serves as the application platform to help students,academics,and researchers.

关键词： COVID-19 educational educational robotics taxonomy application platform

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交谈的要素

Transcriptome profiling reveals phase-specific gene expression in the developing barley inflorescence

2020年

作者： (澳)n.j.恩菲尔德(n.j. Enfield)

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The Crop journal 2020年第1期8卷 71-86页

作者： Huiran Liu Gang Li Xiujuan Yang Hendrik n.j.Kuijer Wanqi Liang Dabing Zhang joint International Research Laboratory of Metabolic&Developmental Sciences Shanghai Jiao Tong University–University of Adelaide Joint Centre for Agriculture and HealthState Key Laboratory of Hybrid RiceSchool of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghai 200240China School of Agriculture Food and WineThe University of AdelaideSouth Australia 5064Australia

The shape of an inflorescence varies among cereals,ranging from a highly branched panicle in rice to a much more compact spike in barley(Hordeum vulgare L.)and wheat(Triticum aestivum L.).However,little is known about the molecular basis of cereal inflorescence *** profiled transcriptomes at three developmental stages of the barley main shoot apex—spikelet initiation,floral organ differentiation,and floral organ growth—and compared them with those from vegetative seedling *** analyses identified 3688 genes differentially transcribed between the three meristem stages,with a further 1394 genes preferentially expressed in reproductive compared with vegetative *** assembly and Gene Ontology analysis classified these 4888 genes into 28 clusters,revealing distinct patterns for genes such as transcription factors,histone modification,and cell-cycle progression specific for each stage of inflorescence *** also compared expression patterns of VRS(SIX-ROWED SPIKE)genes and auxin-,gibberellic acid-and cytokinin-associated genes between two-rowed and six-rowed barley to describe regulators of lateral spikelet *** findings reveal barley inflorescence phase-specific gene expression,identify new candidate genes that regulate barley meristem activities and flower development,and provide a new genetic resource for further dissection of the molecular mechanisms of spike development.

关键词： Inflorescence meristem Transcriptome Gene expression Hormones Barley

Monitoring and modeling of slope movement on rock cliffs prior to failure

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Monitoring and modeling of slope movement on rock cliffs pri...

The Tenth International Symposium on Landslides and Engineered Slopes

作者： n.j. Rosser D.n. Petley International Landslide Centre Institute of Hazard and Risk Research Durham University UK

In this paper we examine the use of terrestrial laser scan data for monitoring large rock cliffs in order to assess the dynamics of the slope condition prior to failure. The assessment presented uses a combination of this terrestrial data and air-borne mapping and imagery to explore the degree to which small-scale precursors to slope failure can be identified, and ultimately used to predict failure. The degree to which data is projected from any given perspective which represents the development of the slope is suggested to be critical. Here we present data that has been collected for four years at monthly intervals from over 35,000 m3 of near-vertical coastal rock face. This high-resolution data is used to identify characteristic spatial and temporal patterns in rockfall activity notably in the periods leading to large-slope failures. To date in excess of 60,000 discrete events have been recorded ranging from 0.00001 m3 to 2,500 m3. The patterns in the data show similarity with time-dependant models of failure mechanisms, which may enable the prediction of failure occurrence both in time and in space. This interpretation is only reached however with appropriate and, in terms of survey, unconventional treatment. Analysis of the data derived from the laser scanning suggests that given sufficient measurement precision, precursory behavior can be identified and monitored but that the relative viewing angle of the observation compared to the vector of deformation is critical. In this instance pre-failure deformations are manifest as the rate of rock fall activity prior to failure, in addition to the direct measurement of the accumulation of the strain field across the failing rock face. The monitoring data implies a time-dependent sequence in the occurrence of rock falls in the period leading to the largest failures recorded, often mirroring the hyperbolic increases in movement witnessed in standard displacement monitoring or laboratory simulation prior to failure. The

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澳大利亚的财政平等机制

财政研究 1990年第5期6卷 51-53页

作者： n.j.汤姆逊朱光耀澳大利亚阿德莱德大学经济学院

财政平等机制是指财政支出责任和支出能力在一个国家的不同层次的政府之间的转移。举例说,如果中央政府向地方政府或州政府提供拨款,以使地方政府能够完成指定的任务,那么。

关键词：地方政府澳大利亚平等机制政府提供联邦政府财政体制中央政府州政府拨款委员会财政支出责任