检索结果-南通市图书馆

Experimental Determination and Modeling of Bubble Size Distributions in Bubble Columns

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 1998年第1期6卷 33-45页

作者： H.F.Svendsen 罗和安 k.W.Hjarbo H.A.jakobsen Department of Chemical Engineering Norwegian University of Science and Technology Department of Chemical Engineering Xiangtan University SINTEF Applied Chemistry DNMI P.O.Box 43Blindern

Using a five point conductivity technique local values of bubble size,bubble velocity and gas fractionhave been experimentally determined in a 288 mmID and 4.3 m high bubble column as a function of axial andradial position for the air/water and CO2/N2/aqueous MDEA *** experimental results are comparedwith predictions from a fundamental two-fluid *** implementation of a non-steady lateral drag term inthe two-fluid model has been *** addition to improving the physical realism of the model,it is found togive slight improvements in the predictions of the distributions of local bubble *** of bubble size arefound in reasonable agreement with experimental values in the heterogeous flow regime,whereas they are stil1found to be unreliable at low gas *** void predictions are found in reasonable agreement with experi-mental values,but deviations occur in the homogeneous flow regime towards the *** is attributed to defi-ciencies in the simplified bubble size

关键词： Bubble column bubble size distribution volumetric velocity gas fraction two-fluid model

Transition Operator Approach to Seismic Full-Waveform Inversion in Arbitrary Anisotropic Elastic Media

在线全文

学校读者我要写书评

暂无评论

Communications in Computational Physics 2020年第6期28卷 297-327页

作者： Morten jakobsen Ivan Psencık Einar Iversen Bjørn Ursin Department of Earth Science University of BergenNorway Institute of Geophysics Czech Academy of SciencesCzech Republic Department of Geoscience and Petroleum NTNU and F.University of BahiaBrazil

We generalize the existing distorted Born iterative T-matrix(DBIT)method to seismic full-waveform inversion(FWI)based on the scalar wave equation,so that it can be used for seismic FWI in arbitrary anisotropic elastic media with variable mass densities and elastic stiffness *** elastodynamic wave equation for an.ar-bitrary anisotropic heterogeneous medium is represented by an integral equation of the Lippmann-Schwinger type,with a 9-dimensional wave state(displacement-strain)*** solve this higher-dimensional Lippmann-Schwinger equation using a transition operator formalism used in quantum scattering *** allows for domain decomposition and novel variational *** tensorial nonlinear inverse scat-tering problem is solved iteratively by using an expression for the Fŕechet derivatives of the scattered wavefield with respect to elastic stiffness tensor fields in terms of modified Green’s functions and wave state vectors that are updated after each *** the generalized DBIT method is consistent with the Gauss-Newton method,it incorporates approximate Hessian information that is essential for the reduction of multi-parameter cross-talk *** DBIT method is implemented efficiently using a variant of the Levenberg-Marquard method,with adaptive selection of the regularization parameter after each *** a series of numerical experiments based on synthetic waveform data for transversely isotropic media with vertical symmetry axes,we obtained a very good match between the true and inverted models when using the traditional Voigt *** suggests that the effects of cross-talk can be sufficiently reduced by the incorporation of Hessian information and the use of suitable regularization *** the generalized DBIT method for FWI in anisotropic elastic media is naturally target-oriented,it may be particularly suitable for applications to seismic reservoir characterization and ***,the theory a

关键词： Waveform inversion time-lapse seismic seismic inverse scattering target-oriented inversion Green’s function

Full scale amendment of a contaminated wood impregnation site with iron water treatment residues

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2016年第4期10卷 169-178页

作者： Sanne Skov NIELSEN Peter kJELDSEN Rasmus jakobsen Orbicon Ringstedvej 20 DK-4000 Roskilde Denmark Department of Environmental Engineering Technical University of Denmark Miljovej 113 DK-2800 Kgs. Lyngby Denmark Geological Survey of Denmark and Greenland Geological Survey of Denmark and Greenland Oster Voldgade 10 DK-1350 Copenhagen K Denmark

Iron water treatment residues （Fe-WTR） are a free by-product of the treatment of drinking water with high concentration of iron oxides and potential for arsenic sorption. This paper aims at applying Fe- WTR to a contaminated site, measuring the reduction in contaminant leaching, and discussing the design of delivery and mixing strategy for soil stabilization at field scale and present a cost-effective method of soil mixing by connnon contractor machinery. Soil contaminated by As, Cr, and Cu at an.abandoned wood impregnation site was amended with 0.22% （dw） Fe-WTR. To evaluate the full scale amendment a 100 mtest site and a control site （without amendment） were monitored for 14 months. Also soil analysis of Fe to evaluate the degree of soil and Fe-WTR mixing was done. Stabilization with Fe-WTR had a significant effect on leachable contaminants, reducing pore water As by 93%, Cu by 91% and Cr by 95% in the upper samplers. Dosage and mixing of Fe-WTR in the soil proved to be difficult in the deeper part of the field, and Pire water concentrations of arsenic was generally *** water logged conditions no increase in dissolved iron or arsenic was observed in the amended soil. Our field scale amendment of contaminated soil was overall successful in decreasing leaching of As, Cr and Cu. With minor improvements in the mixing and delivery strategy, this stabilization method is suggested for use in cases, where leaching ofCu, Cr and As constitutes a risk for groundwater and freshwater.

关键词： Field experiment Iron oxide Arsenic Stabilization Wood preservation sites

Retention and oxidation of nutrients in broiler chickens fell different levels of rapeseed oil during the growth period

在线全文

学校读者我要写书评

暂无评论

Retention and oxidation of nutrients in broiler chickens fel...

High affinity soluble ILT2 receptor:a potent inhibitor of CD8^(+)T cell activation

作者： H.Jφorgensen k.jakobsen Danish Institute of Agricultural Sciences. Research Centre Foulum. Department of Animal Nutrition and Physiology. P.O. Box .50. Dk-8830 Tjele Denmark. Northwest Plateau Danish Institute of Agricultural Sciences. Research Centre Foulum. Department of Animal Nutrition and Physiology. P.O. Box .50. Dk-8830 Tjele Denmark. Northwest Plateau

＜正＞SummaryThe purpose of the present investigation was to evaluate the retention and oxidation pattern of nutrients in broiler chickens led wheat and soybean meal basal diet with graded levels of rapcseed oil of 0, 4, 8 and 16% （Group 1,2,3 and 4 respectively） from 12-42 d of age. Thirty-six female broiler chickens （Ross 208） were allocated to the four groups and kept pair-wise in metabolism cages. The chickens were fed similar amounts of metabolisable energy （ME） per day and similar amounts of essential amino acids relatively to ME by adjusting with crystalline amino acids. The chickens were subjected to four balance periods each of 5 d with two 24 h measurements of gas exchange in two open-air-circuit respiration chambers inserted on the second and third day of each balance period. The mean daily ME-intake was 1.40 MJ/kg0.75 in all groups and the daily intake of digested protein （DP） 17.0-19.1g/kg0.75. The amounts of digested fat （DF） increased from 1.4-12.9 g daily corrcsponding to 1.4-14.0 g DF/kg0.75 with increasing dietary amount of oil, whereas the daily intake of digested carbohydrates （DCHO） decreased from 69-39 g corresponding to 71-43 g DCHO/kg0.75. Protein retention （RP/RE, %） decreased from 60-50%. Fat retention （RE） was 5.2 g/d in Group 1 and 8.4 g/d in Group 4 corresponding to 40-50% of retained energy （RE）. In Group 1 94% of energy in RF originated from DCHO, while in Group 4 48% of retained energy in fat came from DCHO and 47% from DF. Oxidation of fat （OXF） occurred in all groups and increased from 9-43% of total heat production （HE） with increasing dietary oil. while oxidation of carbohydrate （OXCHO） decreased from 83-47% of HE and oxidation of protein contributed with 9-10% of HE.

关键词： protein carbohydrate fat heat production. energy transfer

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Protein & Cell 2010年第12期1卷 1118-1127页

作者： Ruth k.Moysey Yi Li Samantha J.Paston Emma E.Baston Malkit S.Sami Brian J.Cameron Jessie Gavarret Penio Todorov Annelise Vuidepot Steven M.Dunn Nicholas J.Pumphrey katherine J.Adams Fang Yuan Rebecca E.Dennis Deborah H.Sutton Andy D.Johnson Joan.a E.Brewer Rebecca Ashfield Nikolai M.Lissin Bent k.jakobsen Immunocore Limited 57c Milton ParkAbingdonOxonOX144RXUK Current address:Oxford Nanopore Technologies UK Current address:Geneva Merck Serono S.A. Switzerland Current address:Adaptimmune Limited UK

Using directed mutagenesis and phage display on a soluble fragment of the human immunoglobulin superfamily receptor ILT2(synonyms:LIR1,MIR7,CD85j),we have selected a range of mutants with binding affinities enhanced by up to 168,000-fold towards the conserved region of major histocompatibility complex(MHC)class I *** in a dimeric form,either by chemical cross-linking with bivalent polyethylene glycol(PEG)derivatives or as a genetic fusion with human IgG Fc-fragment,the mutants exhibited a further increase in ligand-binding strength due to the avidity effect,with resident half-times(t1/2)on the surface of MHC I-positive cells of many *** novel compounds an.agonized the interaction of CD8 co-receptor with MHC I in vitro without affecting the peptide-specific binding of T-cell receptors(TCRs).In both cytokine-release assays and cell-killing experiments the engineered receptors inhibited the activation of CD8^(+)cytotoxic T lymphocytes(CTLs)in the presence of their target cells,with subnanomolar potency and in a dose-dependent *** a selective inhibitor of CD8^(+)CTL responses,the engineered high affinity ILT2 receptor presents a new tool for studying the activation mechanism of different subsets of CTLs and could have potential for the development of novel autoimmunity therapies.

关键词： CD8^(+)T cells cellular activation autoimmunity cell surface molecules binding affinity phage display

sn-1,3中链甘油三酯对肉仔鸡生产性能和蛋白质与能量代谢的影响

在线全文

学校读者我要写书评

暂无评论

sn-1,3中链甘油三酯对肉仔鸡生产性能和蛋白质与能量代谢的影响

中国畜牧兽医学会2004学术年会暨第五届全国畜牧兽医青年科技工作者学术研讨会

作者：郑春田 H.Jφrgensen k.jakobsen 广东省农业科学院畜牧研究所

油脂代谢能含量高,是家禽饲粮的重要组成部分。在夏季高温条件下,饲粮中添加油脂可缓解家禽因热应激导致的采食量下降、代谢能摄入不足以及由此产生的日增重降低等问题。然而,饲粮中大量使用长链甘油三酯可能引起家禽体内脂肪过多沉积,...

油脂代谢能含量高,是家禽饲粮的重要组成部分。在夏季高温条件下,饲粮中添加油脂可缓解家禽因热应激导致的采食量下降、代谢能摄入不足以及由此产生的日增重降低等问题。然而,饲粮中大量使用长链甘油三酯可能引起家禽体内脂肪过多沉积,鸡肉过肥,消费者难以接受。中链甘油三酯(脂肪酸链长为6～12碳)可降低大鼠(Geliebter等,1983)、猪(Newport等,1979)和肉仔鸡(Mabayo,1993)的脂肪沉积。但中链甘油三酯不能提供必需脂肪酸(亚油酸)。sn-1,3中链甘油三酯是由中链甘油三酯和

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

结构特异性甘油三酯对肉仔鸡能量代谢的影响

结构特异性甘油三酯对肉仔鸡能量代谢的影响

亚油酸替代其他宏量营养素与缺血性脑卒中风险的关系

动物生理生化学分会第八次学术会议暨全国反刍动物营养生理生化第三次学术研讨会

作者：郑春田 H.Jφrgensen k.jakobsen PkTheil 广东省农业科学院畜牧研究所丹麦农业研究所动物营养与生理系

本研究旨在探讨结构特异性甘油三酯(由菜籽油与C10:0中链脂肪酸经特定的水解和酯化反应生产的酯类混合物,甘油骨架的1、3位连接的主要是中链脂肪酸,2位为长链不饱和脂肪酸)对肉仔鸡能量代谢的影响,为开发新型油脂饲料资源提供理论依据...

本研究旨在探讨结构特异性甘油三酯(由菜籽油与C10:0中链脂肪酸经特定的水解和酯化反应生产的酯类混合物,甘油骨架的1、3位连接的主要是中链脂肪酸,2位为长链不饱和脂肪酸)对肉仔鸡能量代谢的影响,为开发新型油脂饲料资源提供理论依据。试验分两批进行,每批选用40羽母雏(罗斯208),随机分为5个处理,分别饲喂含有0%、2%、4%、6%和8%的结构特异性甘油三酯的试验饲粮(粉料),为保持每种饲粮总油脂水平相同,分别在上述5种饲粮中添加8%、6%、4%、2%和0%的菜籽油。在育雏期(0～12天),每处理试验鸡分两笼饲养,每笼4只鸡。在生长期

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

中华高血压杂志 2017年第11期25卷 1007-1007页

作者：刘莉叶鹏 Ven? Sk Schmidt EB jakobsen MU Lundbye-Christensen S Bach FW Overvad k

缺血性脑卒中是世界范围内的主要健康问题，但膳食因素对脑卒中风险的影响尚不清楚。这项研究旨在调查缺血性脑卒中及其亚型的发生风险与亚油酸摄入量较高，饱和脂肪酸、单不饱和脂肪酸或碳水化合物摄入量较低的关系。方法：在丹麦前瞻... 详细信息

缺血性脑卒中是世界范围内的主要健康问题，但膳食因素对脑卒中风险的影响尚不清楚。这项研究旨在调查缺血性脑卒中及其亚型的发生风险与亚油酸摄入量较高，饱和脂肪酸、单不饱和脂肪酸或碳水化合物摄入量较低的关系。方法：在丹麦前瞻性膳食、癌症和健康研究中，年龄50~64岁的受试者57053人，使用经验证的半定量食物频率问卷收集膳食信息。

关键词：缺血性脑卒中发生风险亚油酸宏量营养素单不饱和脂肪酸半定量食物频率问卷膳食因素健康问题

Search for the doubly heavy baryons Ωbc0 and Ξbc0 decaying to Λc+π- and Ξc+π-

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2021年第9期45卷 14-25页

作者： R.Aaij C.Abellán Beteta T.Ackernley B.Adeva M.Adinolfi H.Afsharnia C.A.Aidala S.Aiola Z.Ajaltouni S.Akar J.Albrecht F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche G.Alkhazov P.Alvarez Cartelle S.Amato Y.Amhis L.An L.Anderlini A.Andreianov M.Andreotti F.Archilli A.Artamonov M.Artuso k.Arzymatov E.Aslanides M.Atzeni B.Audurier S.Bachmann M.Bachmayer J.J.Back P.Baladron Rodriguez V.Balagura W.Baldini J.Baptista Leite R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Baryshnikov J.M.Basels G.Bassi B.Batsukh A.Battig A.Bay M.Becker F.Bedeschi I.Bediaga A.Beiter V.Belavin S.Belin V.Bellee k.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-Haim A.Berezhnoy *** D.Berninghoff H.C.Bernstein C.Bertella A.Bertolin C.Betancourt F.Betti Ia.Bezshyiko S.Bhasin J.Bhom L.Bian M.S.Bieker S.Bifani P.Billoir M.Birch F.C.R.Bishop A.Bitadze A.Bizzeti M.Bj?rn M.P.Blago T.Blake F.Blanc S.Blusk D.Bobulska J.A.Boelhauve O.Boente Garcia T.Boettcher A.Boldyrev A.Bondar N.Bondar S.Borghi M.Borisyak M.Borsato J.T.Borsuk S.A.Bouchiba T.J.V.Bowcock A.Boyer C.Bozzi M.J.Bradley S.Braun A.Brea Rodriguez M.Brodski J.Brodzicka A.Brossa Gonzalo D.Brundu A.Buonaura C.Burr A.Bursche A.Butkevich J.S.Butter J.Buytaert W.Byczynski S.Cadeddu H.Cai R.Calabrese L.Calefice L.Calero Diaz S.Cali R.Calladine M.Calvi M.Calvo Gomez P.Camargo Magalhaes A.Camboni P.Campana A.F.Campoverde Quezada S.Capelli L.Capriotti A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli P.Carniti L.Carus k.Carvalho Akiba A.Casais Vidal G.Casse M.Cattaneo G.Cavallero S.Celani J.Cerasoli A.J.Chadwick M.G.Chapman M.Charles Ph.Charpentier G.Chatzikonstantinidis C.A.Chavez Barajas M.Chefdeville C.Chen S.Chen A.Chernov V.Chobanova S.Cholak M.Chrzaszcz A.Chubykin V.Chulikov P.Ciambrone M.F.Cicala X.Cid Vidal G.Ciezarek P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cobbledick V.Coco J.A.B.Coelho J.Cogan E.Cogneras L.Cojocariu P.Collins T.Colombo L.Congedo A.Contu N.Cooke G.Coombs G.Corti C.M.Costa Sobral B.Couturier D.C.Craik J.Crkovská M.Cruz Torres R.Currie C.L.Da Silva E.Dall'Occo J.Dalseno C.D'Amb University of Edinburgh Horia Hulubei National Institute of Physics and Nuclear Engineering INFN Sezione di Bari Università di Bari Los Alamos National Laboratory (LANL) Van Swinderen Institute University of Groningen Universiteit Maastricht AGH-University of Science and Technology Faculty of Physics and Applied Computer Science Université Clermont Auvergne Università di Cagliari Institute for Nuclear Research of the National Academy of Sciences (kINR) School of Physics University College Dublin NSC kharkiv Institute of Physics and Technology (NSC kIPT) INFN Sezione di Perugia STFC Rutherford Appleton Laboratory School of Physics and Astronomy Monash University Novosibirsk State University CNRS/IN2P3 Department of Physics and Astronomy Uppsala University Università di Genova School of Physics State key Laboratory of Nuclear Physics and Technology Peking University National Center for Nuclear Research (NCBJ) Università di Roma Tor Vergata Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio) Universidade Federal do Triangulo Mineiro (UFTM) Institute of Particle Physics LPC Central China Normal University Hangzhou Institute for Advanced Study UCAS Instituto de Fisica Corpuscular Centro Mixto Universidad de Valencia-CSIC Nikhef National Institute for Subatomic Physics and VU University Amsterdam National Research Tomsk Polytechnic University AGH-University of Science and Technology Faculty of Computer Science Electronics and Telecommunications University of Michigan Università di Siena Università di Padova Scuola Normale Superiore National Research Centre kurchatov Institute Università degli Studi di Milano MSU-Iligan Institute of Technology (MSU-IIT) Università di Firenze INFN Sezione di Roma La Sapienza Institut für Physik Universit?t Rostock INFN Sezione di Milano Departamento de Fisica Universidad Nacional de Colombia Universit?t Bonn-Helmholtz-Institut für Strahlen und kernphysik Hanoi University of Science Università di Pisa P.N. Lebedev Physical Institute Russian.academy of Science (LPI RAS) Università

The first search for the doubly heavy Ωbc0baryon and a search for the Ξbc0baryon are performed using pp collision data collected via the LHCb experiment from 2016 to 2018 at a centre-of-mass energy of 13 TeV,corresponding to an integrated luminosity of 5.2 *** baryons are reconstructed via their decays to ∧c+π-andΞc+π-.No significant excess is found for invariant masses between 6700 and 7300 MeV/c2,in a rapidity range from2.0 to 4.5 and a transverse momentum range from 2 to 20 MeV/*** limits are set on the ratio of the Ωbc0andΞbc0production cross-section times the branching fraction to ∧c+π-（Ξc+π-） relative to that of the ∧b0（Ξb0） baryon,for different lifetime hypotheses,at 95% confidence *** upper limits range from 0.5×10-4to 2.5×10-4for theΩbc0→∧c+π-(Ξbc0→∧c+π-) decay,and from 1.4×10-3to 6.9×10-3for the Ωbc0→Ξc+π-(Ξbc0→Ξc+π-) decay,depending on the considered mass and lifetime of the Ωbc0(Ξbc0) baryon.

关键词： B physics quarkonium spectroscopy heavy quark production