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1037篇 您的检索式:作者名="Freed"
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1页岩拉张型微裂缝几何特征描述及渗透率计算显示文摘为了研究页岩拉张型微裂缝中的渗流规律,采用巴西实验在5块Barnett页岩岩心中形成拉张型裂缝。采用三维面轮廓仪获取裂缝面形态,基于扫描原理将三维信息转换为二维信息计算迂曲度、倾角、粗糙度等特征参数,引入聚类分析方法明确各参数间距离,采用格子玻尔兹曼方法模拟开度在0.05~0.40mm范围内页岩微裂缝渗流,并结合理论分析推导微裂缝渗透率计算公式。结果表明:所选取样本迂曲度在1.10左右,倾角为0.99°~8.86°,粗糙度为0.062-0.162mm;迂曲度、粗糙度、倾角对渗透率影响不存在替代关系,必须同时考虑三者的影响;计算微裂缝渗透率比平板模型渗透率要小19%-29%,说明必须考虑裂缝粗糙度影响;经验证,推导的渗透率计算公式误差控制在4%以内,可用于拉张型微裂缝渗透率计算。曲冠政 曲占庆 HAZLETT Randy Dolye FREED David MUSTAFAYEV Rahman 2016石油勘探与开发2016,43,1:22
22种昆虫病原真菌对草地贪夜蛾体表侵染模式的扫描电镜观察显示文摘【目的】在前期筛选获得对草地贪夜蛾高效致病真菌球孢白僵菌(Beauveria bassiana)菌株GZSL-1和玫烟色虫草(Cordyceps fumosorosea)菌株IFCF01的基础上,进一步明确2株菌株在草地贪夜蛾体表的侵染模式,为阐明菌株致病机理,提高昆虫病原真菌对草地贪夜蛾的防效提供理论依据。【方法】利用扫描电镜观察草地贪夜蛾2龄幼虫分别接种菌株GZSL-1和IFCF01(孢子悬浮液浓度为1.0×10^(7)孢子/mL)后分生孢子在幼虫体表附着、萌发、穿透和增殖的过程。【结果】菌株GZSL-1和IFCF01萌发后均可形成附着胞,草地贪夜蛾幼虫体表结构对2株菌株分生孢子萌发、附着和穿透芽管长度有不同程度的影响。2株菌株在各结构区均有较高的萌发率(>90.00%)和附着胞率(>80.00%),在平缓结构区比瘤状突起结构区观察到更短的穿透芽管。在各结构区,菌株GZSL-1形成的穿透芽管长度均短于菌株IFCF01相应的芽管长度,在平缓结构区,菌株GZSL-1的穿透芽管长度显著短于菌株IFCF01(P<0.05)。菌株GZSL-1和IFCF01分生孢子接种后分别在16和8 h内萌发,在24和32 h内普遍出现穿透结构穿透草地贪夜蛾幼虫体壁。2株菌株的初级和次级分生孢子分别在接种后72和96 h内出现。【结论】扫描电镜观察证实球孢白僵菌菌株GZSL-1和玫烟色虫草菌株IFCF01对草地贪夜蛾具有高致病性,揭示了病原真菌分生孢子在草地贪夜蛾虫体上的侵染过程,结果为后续2株菌株的改良及田间应用打下理论基础。雷妍圆 官昭瑛 Shoaib Freed Syed Muhammad Zaka Abid Hussin 章玉苹 2021南方农业学报2021,52,3:2
3A national survey of pediatric critical care resources in the United States显示文摘Odetola FO Clark SJ Freed GL 2005Pediatrics2005,115,3:1
4Transplantation of embryonic dopamine neurons for severe parkinson's disease显示文摘Freed CR Greene PE Breeze RE 2001N Engl J Med2001,344,10:1
5Transpressional rupture of an unmapped fault during the 2010 Haiti earthquake显示文摘Calais E Freed A Mattioli G 2010Nature Geo~cience2010,3,11:1
6Transplantation of embryonic dopamine neurons for severe Parkinson's dis- ease 显示文摘Freed CR Greene PE Breeze RE N Engl J Med0,344,8:1
7Lattice-Boltzmarm method for macroscopic porous media modeling 显示文摘FREED D M 1998International Journal of Modem Physics C1998,9,8:1
8Evaluation of binaural functions in bilateral cochlear implant users显示文摘Chan JC Freed DJ Vermiglio AJ 2008Int J Audiol2008,47,:1
9Unenhanced Helical Computerized Tomography for the Evaluation of Patients with Acute Flank pain显示文摘Vieweg J Teh C Freed K 1998J Urol1998,160,9:1
10Interseismie plate coupling and strain partitioning in the northeastern Caribbe- an 显示文摘Manaker D M Calais E Freed A M 2008Geophysical Journal International2008,174,3:1
11Carpooling and Booster Seats: A National Survey of Parents 显示文摘Macy ML Clark SJ Freed GL 2012Pediatrics2012,129,2:1
12Transplantation of embryonic dopamine neurons for severe Parkinson's disease显示文摘Freed CR Greene PE Breeze RE 2001N Engl J Med2001,344,10:1
13Transplantation of embryonic dopamine neurons for severe Parkinson's disease显示文摘Freed C R Greene P E Breeze R E 2001N Engl J Med2001,344,10:1
14Electrical stimula- tion for swallowing disorders caused by stroke显示文摘Freed ML Freed L Chatburn RL 2001Respirato- ry Care2001,46,5:1
15Transplnntation of embryonic dopamine disease 显示文摘Freed CR Greene RE Breeze RE 2001N Engl Med2001,344,:1
16Neocartilage formation in vitro and in vivo using cells cultured on synthetic biodegradable polymers 显示文摘FREED L G MARQUIS J C NOMIA A 1993J Biomed Mater Res1993,27,:1
17Adult intramedullary spinal cord ependymomas: the results of strgery in 38 patients 显示文摘Epstein FJ Farmer JP Freed D 1993Neurosurgery1993,79,:1
18Factors influencing the dyeing of acetate fibres with disperse nonionic dyes显示文摘Freed Fortess Salvin VS 1958Textile Res J1958,28,10:1
19Algorithms for the fractional calculus: A selection of numerical methods显示文摘Diethelm K Ford N J Freed A D 2005Computer Methods in Applied Mechanics and Engineering2005,194,68:1
20Effect of temperature on development and reproduction of Proprioseiopsis asetus (Acari:Phytoseiidae) fed on asparagus thrips, Thrips tabaci显示文摘Huang J H Freed S Wang L S 2014Experimental and Applied Acarology2014,64,2:1
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