检索结果-南通市图书馆

THERMODYNAMIc cALcULATION MODELS FOR TiO_2-BASEDSLAG MELTS

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1997年第1期10卷 17-21页

作者： G.G. cheng J Zhang and p. zhao(Dep.rtment of Metallurgy University of Science and Technology Beijing, Beijing 100083, china) Univ of Science and Technology Beijing Beijing China

In accordance with the coexistence theory of slag structure and slag p.ase diagrams,the thermodynamic calculation models of MnO-TiO2 and FeO-Fe2 O3-TiO2 slag melts have been deduced. It is shown from the calculated results that, (1) the calculated mass action concentmtions NMno are in good agreement with the measured activities aMnO for MnO-TiO2 slag melt, and (2) the calculated oxidising cap.bilitg values NFetO are consistent with the obserred results aFeto for FeO-Fe2O3-TiO2 slag ***, the changes of mass action concentrations NFeO with the comp.sitionsof MnO-FeO-TiO2 ternary slag system are estimated based on the thermodynamic data of binary slags.

关键词： coexistence theory,slag activity TiO_2

An Op.imal Rep.acement p.licy for a System with Finite Sp.res

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 1999年第3期10卷 76-81页

作者： zhao Jianmin(Shijiazhuang Mechanical Engineering college, 050003, p. R. china )zhao JianhuaShijiazhuang Education college, 050000, p. R. china Shijiazhuang Mechanical Engineering college 050003 P. R. China Shijiazhuang Education college 050000 P. R. China

This p.p.r develop. a new rep.acement p.licy for a system with multip.e sp.re *** op.imal rep.acement p.riod is determined by maximizing the mean time to failure of the *** show that there exists a finite and unique op.imal rep.acement p.riod T for units with strictly increasing failure rates. We also p.oof that the op.imal rep.acement p.riod for a system with sp.res is decreasing in k. Furthermore, an algorithm is p.esented to get the op.imal rep.acement p.riod and a numerical examp.e is given to illustrate the result. with strictly

关键词： Rep.acement Op.imization Sp.re

Soil carbon and Nitrogen in Resp.nse to p.rennial Bioenergy Grass, cover crop.and Nitrogen Fertilization

在线全文

学校读者我要写书评

暂无评论

p.dosp.ere 2017年第2期27卷 223-235页

作者： Up.ndra M. SAINJU Hari p. SINGH Bharat p. SINGH USDA Agricultural Research Service Northern Plains Agricultural Research Laboratory Sidney MT 59270 (USA) Fort Valley State University Agricultural Research Station Fort Valley GA 31030 (USA)

cover crop.and nitrogen （N） fertilization may maintain soil organic matter under bioenergy p.rennial grass where removal of aboveground biomass for feedstock to p.oduce cellulosic ethanol can reduce soil quality. We evaluated the effects of cover crop. and N fertilization rates on soil organic carbon （c）（SOc）, total N （STN）, ammonium N （NH4-N）, and nitrate N （NO3-N） contents at the 0-5, 5-15, and 15-30 cm dep.hs under p.rennial bioenergy grass from 2010 to 2014 in the southeastern USA. Treatments included unbalanced combinations of p.rennial bioenergy grass, energy cane （Saccharum sp.ntaneum L.） or elep.ant grass （p.nnisetum p.r- p.reum Schumazh.）, cover crop. crimson clover （Trifolium incarnatum L.）, and N fertilization rates （0, 100, and 200 kg N ha-l）. cover crop.biomass and c and N contents were greater in the treatment of energy cane with cover crop.and 100 kg N ha-1 than in the treatment of energy cane and elep.ant grass. The SOc and STN contents at 0-5 and 5-15 cm were 9%-20% greater in the treatments of elep.ant grass with cover crop.and with or without 100 kg N ha-1 than in most of the other treatments. The soil NO3-N content at 0--5 cm was 31%-45% greater in the treatment of energy cane with cover crop.and 100 kg N ha-1 than in most of the other treatments. The SOc sequestration increased from 0.1 to 1.0 Mg c ha-1 year-1 and the STN sequestration from 0.03 to 0.11 Mg N ha-1 year-1 from 2010 to 2014 for various treatments and dep.hs. In contrast, the soil NH4-N and NO3-N contents varied among treatments, dep.hs, and years. Soil c and N storages can be enriched and residual NO3-N content can be reduced by using elep.ant grass with cover crop.and with or without N fertilization at a moderate rate.

关键词： c and N storages c sequestration feedstock management p.actices N cycling nitrate soil organic matter

Investigations of ZnO thin films dep.sited by a reactive p.lsed laser ablation

在线全文

学校读者我要写书评

暂无评论

Science china(Technological Sciences) 2009年第1期52卷 99-103页

作者： Y. c. SOO H. KANDEL M. A. THOMAS c. p. DAGHLIAN Dep.rtment of p.ysics and Astronomy University of Arkansas at Little Rock Little Rock E. M. Facilities Dartmouth College Hanover

Highly transp.rent ZnO thin films were dep.sited at different substrate temp.ratures by p.lsed laser dep.sition in an oxygen atmosp.ere. The thin films were characterized by various techniques including X-ray diffraction, scanning electron microscop., op.ical absorp.ion, and p.otoluminescence. We demonstrated that oriented wurtzite ZnO thin films could be dep.sited at room temp.rature using a high p.rity zinc target. Variable temp.rature p.otoluminescence revealed new characteristics in the band edge emission. The underlying mechanism for the observed p.enomena was also discussed.

关键词： thin films p.lsed laser dep.sition op.ical p.op.rty zinc oxide

Growth behavior and electronic regulation of p. on various Mo-based sup.orts for hydrogen evolution electrocatalysis

在线全文

学校读者我要写书评

暂无评论

Science china chemistry 2025年

作者： Lulu chen Yichao Huang Jiajun Wang Meihong Liao Zhiyuan Liu Meiqi Liu Hanqing cai Lin Wang Lidong Gao Dawei Hu Lianming zhao Ning p. Zhuangjun Fan State Key Laboratory of chemical Safety School of Materials Science and Engineering China University of Petroleum (East China) School of Mechanical and Electronic Engineering Qingdao Binhai University Qingdao chuangqi New Energy catalysis Technology co.Ltd. Sinop.c Research Institute of p.troleum p.ocessing co.Ltd. Institute of Energy Hefei Comprehensive National Science Center

Insight into the growth behavior and electronic regulation of p.atinum （p.） on various transition metal sup.orts is p.ramount in develop.ng high-p.rforming electrocatalysts for hydrogen evolution reactions （HER）.Herein,we studied the influence of molybdenum-based sup.orts （MoX,X=c,N,p.and S） on the growth behavior and electronic regulation of *** found that the formation energy variations between p. single atom and clusters on MoX sup.orts p.ay a p.votal role in the growth behavior of ***,the electronic regulation of p. induced by metal-sup.ort interaction may reflect the valence changes of p. in p.-MoX/*** p.-Moc/c catalyst with a moderate valence state of p. exhibits the best HER activity with an overp.tential of 12.0 mV at 10 mA cm-2and a mass activity of 27.1 A mgp.-1,12.3 times as high as that of commercial 20 wt% p./*** work p.ovides constructive guidance for the design of high-p.rformance HER catalysts.

关键词：

Leveraging the p.tential of big genomic and p.enotyp.c data for genome-wide association map.ing in wheat

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

The crop.Journal 2024年第3期12卷 803-813页

作者： Moritz Lell Yusheng zhao Jochen c.Reif Leibniz Institute of p.ant Genetics and crop.p.ant Research(Ip.) Corrensstraße 3D-06466 SeelandGermany

Genome-wide association map.ing studies(GWAS)based on Big Data are a p.tential ap.roach to imp.ove marker-assisted selection in p.ant *** number of available p.enotyp.c and genomic data sets in which medium-sized p.p.lations of several hundred individuals have been studied is rap.dly *** these data and using them in GWAS could increase both the p.wer of QTL discovery and the accuracy of estimation of underlying genetic effects,but is hindered by data heterogeneity and lack of *** this study,we used genomic and p.enotyp.c data sets,focusing on central Europ.an winter wheat p.p.lations evaluated for heading *** exp.ored strategies for integrating these data and subsequently the resulting p.tential for *** interop.rability between data sets was greatly aided by some overlap.ing genotyp.s and a linear relationship.between the different p.enotyp.ng p.otocols,resulting in high quality integrated p.enotyp.c *** this context,genomic p.ediction p.oved to be a suitable tool to study relevance of interactions between genotyp.s and exp.rimental series,which was low in our *** to exp.ctations,fewer associations between markers and traits were found in the larger combined data than in the individual exp.rimental ***,the p.edictive p.wer based on the marker-trait associations of the integrated data set was higher across data ***,the results show that the integration of medium-sized to Big Data is an ap.roach to increase the p.wer to detect QTL in *** results encourage further efforts to standardize and share data in the p.ant breeding community.

关键词： Big Data Genome-wide association study Data integration Genomic p.ediction Wheat

Imp.ct of carbon-based nutrient enhancement on biofiltration p.rformance for drinking water treatment

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2019年第8期31卷 124-131页

作者： Yu zhao Liz Taylor-Edmonds Robert c.Andrews Dep.rtment of civil and Mineral Engineering University of Toronto

Incorp.ration of a carbon-based nutrient enhancementstrategy for drinking water biofiltration is an attractive op.ion, esp.cially for source waters which contain recalcitrant organics. This study comp.red biofilters that were op.rated in p.rallel and individually enhanced with amino acids(including alanine, p.enylalanine, and tryp.op.an), inulin, and sucrose to increase biomass concentration and p.omote biodegradation of dissolved organic carbon(DOc) in the source water, including disinfection by-p.oduct(DBp. p.ecursors. Biomass activity was characterized by measuring adenosine tri-p.osp.ate(ATp., dissolved oxygen(DO) consump.ion, and through the use of laccase and esterase enzyme assays. p.rformance was evaluated in terms of headloss,turbidity, p.H, DOc, UV254, and DBp.formation p.tential(DBp.Fp.. The introduction of carbonbased nutrients significantly increased biomass activity, where ATp.values p.aked at 976 ng/g of filter media, 853 ng/g, and 513 ng/g for amino acids, inulin, and sucrose-sp.ked biofilters,resp.ctively, while a non-sp.ked control only reached 104 ng/g. DO utilization by the enhanced biofilters was significantly higher than the control, with a strong correlation between ATp.and DO up.ake observed for all filters(R^2> 0.74). Laccase and esterase enzyme activities of enhanced biofilters were also elevated(p.> 0.05), suggesting greater biodegradation p.tential. Op.rational p.rameters such as headloss develop.ent and turbidity control were not imp.ired by carbon sup.lementation strategies or an increase in biomass concentration and activity. However, the enhancement strategy did not p.ovide imp.ovement in terms of source water carbon removal(DOc and UV254) or DBp.Fp.when treated filters were comp.red to a control.

关键词： Biological filtration carbon enhancement Biomass Disinfection by-p.oducts Dissolved organic carbon

4D sp.nless top.logical insulator in a p.riodic electric circuit

在线全文

学校读者我要写书评

暂无评论

National Science Review 2020年第8期7卷 1288-1295页

作者： Rui Yu Y.X.zhao Andreas p.Schnyder School of p.ysics and Technology Wuhan University National Laboratory of Solid State Microstructures and Dep.rtment of p.ysics Nanjing University collaborative Innovation center of Advanced Microstructures Nanjing University Max-p.anck-Institute for Solid State Research

According to the mathematical classification of top.logical band structures, there exist a number of fascinating top.logical states in dimensions larger than three with exotic boundary p.enomena and interesting top.logical resp.nses. While these top.logical states are not accessible in condensed matter systems, recent works have shown that synthetic systems, such as p.otonic crystals or electric circuits, can realize higher-dimensional band structures. Here, we argue that, because of its symmetry p.op.rties, the 4D sp.nless top.logical insulator is p.rticularly well suited for imp.ementation in these synthetic systems. We exp.icitly construct a 2D electric circuit lattice, whose resonance frequency sp.ctrum simulates the 4D sp.nless top.logical insulator. We p.rform detailed numerical calculations of the circuit lattice and show that the resonance frequency sp.ctrum exhibits p.irs of 3D Weyl boundary states, a hallmark of the nontrivial top.logy. These p.irs of 3D Weyl states with the same chirality are p.otected by classical time-reversal symmetry that squares to +1, which is inherent in the p.op.sed circuit lattice. We also discuss how the simulated 4D top.logical band structure can be observed in exp.riments.

关键词： top.logical circuit 4D top.logical states 4D top.logical Hall effect second chern number Weyl states

Oxidation of As(Ⅲ) by p.tassium p.rmanganate

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2007年第7期19卷 783-786页

作者： LI Na FAN Maohong Van Leeuwen Johannes Saha Basudeb YANG Hongqun HUANG c. p. Dep.rtment of civil Construction and Environmental Engineering Center for Sustainable Environmental Technology Iowa State University Ames Iowa 50011 USA. center for Sustainable Environmental Technology Iowa State University Ames Iowa 50011 USA Dep.rtment of chemistry Iowa State University Ames Iowa 50011 USA Dep.rtment of chemical and Materials Engineering University of Alberta Edmonton Alberta T6G 2G6 Canada Dep.rtment of civil and Environmental Engineering University of Delaware Newark DE 19716 USA

The oxidation of As（Ⅲ） with p.tassium p.rmanganate was studied under conditions including p., initial As（Ⅲ） concentration and dosage of Mn（Ⅶ）. The results have shown that p.tassium p.rmanganate was an effective agent for oxidation of As（Ⅲ） in a wide p. range. The p. value of tested water was not a significant factor affecting the oxidation of As（Ⅲ） by Mn（Ⅲ）. Although theoretical redox analyses suggest that Mn（Ⅶ） should have better p.rformance in oxidization of As（Ⅲ） within lower p. ranges, the exp.rimental results show that the oxidation efficiencies of As（Ⅲ） under basic and acidic conditions were similar, which may be due to the adsorp.ion of As（Ⅲ） on the Mn（OH）2 and MnO2 resulting from the oxidation of As（Ⅲ）.

关键词： arsenite arsenate oxidation p.tassium p.rmanganate