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53篇 您的检索式:作者名="Nkrumah"
    题名 作者 年代 出处 被引量
1Research on water ice content in Cabeus crater using the data from the microwave radiometer onboard Chang’e-1 satellite显示文摘The existence, formation and content of water ice in the lunar permanently shaded region is one of the important questions for the current Moon study. On October 9, 2009, the LCROSS mission spacecraft impacted the Moon, and the initial result verified the existence of water on the Moon. But the study on formation and content of water ice is still under debate. The existence of water ice can change the dielectric constants of the lunar regolith, and a microwave radiometer is most sensitive to the dielectric parameters. Based on this, in this paper, the radiation transfer model is improved according to the simulation results in high frequency. Then the mixture dielectric constant models, including Odelevsky model, Wagner and landau-Lifshitz model, Clau-sius model, Gruggeman-Hanai model, etc., are analyzed and compared. The analyzing results indicate that the biggest difference occurs between Lichtenecker model and the improved Dobson model. The values estimated by refractive model are the second biggest in all the models. And the results from Odelevsky model, strong fluctuation model, Wagner and Landau –Lifshitz model, Clausius model and Bruggeman-Hanai model are very near to each other. Thereafter, the relation between volume water ice content and microwave brightness temperature is constructed with Odelevsky mixing dielectric model and the improved radiative transfer simulation, and the volume water ice content in Cabeus crater is retrieved with the data from microwave radiometer onboard Chang’e-1 satellite. The results present that the improved radiative transfer model is proper for the brightness temperature simulation of the one infinite regolith layer in high frequency. The brightness temperature in Cabeus crater is 69.93 K (37 GHz), and the corresponding volume water ice content is about 2.8%.MENG ZhiGuo 1 , CHEN ShengBo 1* , Edward Matthew OSEI Jnr 2 , WANG ZiJun 1 & CUI TengFei 1 1 College of Geoexploration Science and Technology, Jilin University, Changchun 130026, China 2 Department of Geomatic Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana 2010Science China(Physics,Mechanics & Astronomy)2010,53,12:4
2In vitro efficacy,resistance selection,and structural modeling studies implicate the malarial parasite apicoplast as the target of azithromycin显示文摘Sidhu AB Sun Q Nkrumah LJ 0,,04:1
3Comparative evalua-tion of two rapid field tests for malaria diagnosis: partec rapid malaria test(R) and binax Now(R) malaria rapid diagnostic test显示文摘Nkrumah B Acquah SE Ibrahim L 2011BMC Infect Dis2011,23,11:1
4Poly- morphisras and haplotypes in the bovine neuropeptide Y, growth hormone receptor,ghrelin,insulin-like growth fac- tor 2,and uncoupling proteins 2 and 3 genes and their associations with measures of growth, performance, feed efficiency, and carcass merit in beef cattle显示文摘Sherman E L Nkrumah J D Murdoch B M 2008Journal of Animal Science2008,86,1:1
5Respiratory viruses in children hospitalized for acute lower respiratory tract infection in Ghana显示文摘Kwofie TB Anane YA Nkrumah B 2012Virol J2012,10,9:1
6Randomized trial of sulfamethoxazole + trimethoprim versus procaine penicillin for the outpatient treatment of childhood pneumonia in Zimbabwe显示文摘Keeley D J Nkrumah FK Kapuyanyika C 1990Bull World Health Organ1990,68,2:1
7Identifica-tion of polymorphisms influencing feed intake and efficiency in beef cattle显示文摘Sherman E L Nkrumah J D Murdoch B M 2007Animal Genetics2007,39,:1
8Polymorphisms in the bovine leptin promoter associated with serum leptin concentration, growth, feed intake, feeding behavior, and measures of carcass mreit显示文摘Nkrumah J D Li C Yu J et ol 2005J Anim Sci2005,83,:1
9Lysimeter and field studies on 15N in a tropical soil 显示文摘 Griffith S M Ahmad N 1989Plant and Soil1989,114,:1
10Polymor- phisms and haplotypes in the bovine neuropeptide Y, growth hormone receptor,ghrelin,insulin-like growth fac- tor 2, and uncoupling proteins 2 and 3 genes and their asso- ciations with measures of growth, performance, feed effi ciency,and carcass merit in beef cattle显示文摘Sherman E L Nkrumah J D Murdoch B M 2008J Anim Sci2008,86,1:1
11Relationships of feedlot feed efficiency,performance,and feeding behavior with metabolic rate,methane production,and energy partitioning in beef cattle显示文摘Nkrumah J D Okine E K Mathison J W 2006Journal of Animal Science2006,84,:1
12Polymorphisms in the bovine leptin promoter associated with serum leptin concentration, growth, feed in- take,feeding behavior and measures of carcass rherit显示文摘Nkrumah J D Li C Yu J 2005Anita Sci2005,83,1:1
13Performance of rapid DiaMed OptiMal-IT malaria test in an endemic Ghanaian setting显示文摘Ayeh-Kumi PF Ajakufa BG Nkrumah NO 2011J Parasit Dis2011,35,2:1
14Polymorphisms and haplotypes in the bovine neuropeptide Y, growth hormone receptor, ghrelin, insulin-like growth factor 2, and uncoupling proteins 2 and 3 genes and their associations with measures of growth, performance, feed efficiency, and carcass merit in beef cattle 显示文摘Sherman E L Nkrumah J D Murdoch B M 2008Journal of Animal Science2008,86,1:1
15Whole genome single nucleotide polymorphism associations with feed intake and feed efficiency in beef cattle显示文摘Sherman E L Nkrumah J D Moore S 2010J Anita Sci2010,88,1:1
16Test duration for growth, feed intake, and feed efficiency in beef cat- tle using the Growsafe System 显示文摘WANG Z NKRUMAH J D LI C 2006Journal of Animal Science2006,84,9:1
17Partner, Prototype orPersuader? China' s Renewed Media Engagement with Ghana显示文摘Gagliardone I Stremlau N Nkrumah D 2012Communication Politics & Culture2012,45,2:1
18Polymorphisms and haplotypes in the bovine neuropeptide Y, growth hormone receptor, ghrelin, insulin-like growth factor 2, and uncoupling proteins 2 and 3 genes and their associations with measures of growth, performance, feed efficiency, and carcass merit in beef cattle 显示文摘SHERMAN E L NKRUMAH J D MURDOCH B M 2008Journal of Animal Science2008,86,1:1
19Polymorphisms in the bovine leptin promoter associated with serum leptin concentration, growth, feed intake, feeding behavior, and Measures of carcass merit显示文摘Nkrumah J D Li C Yu J 2005Journal of Animal Science2005,83,1:1
20Association of single nucleotide polymorphisms in the bovine leptin gene with feedlot and carcass characteristics of crossbred steers显示文摘Crews D H Nkrumah J D Yu J 2004Canadian Journal of Animal Science2004,84,4:1
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