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Search Results: 1 - 10 of 142493 matches for " LI Cong-ying "
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Transition of contact behavior induced by interfacial adhesion
表面黏附导致的接触行为转变

Duan Fang-Li,Yang Ji-Ming,Qiu He-Bing,Wu Cong-Ying,
段芳莉
,杨继明,仇和兵,吴聪颖

物理学报 , 2012,
Abstract: Large-scale molecular dynamics simulations are performed to study the adhesive contact between a rigid spherical tip and an elastic flat substrate. We focus on he relations between the real contact area and the external load and between the repulsive force and attractive force on contact interface. The simulated results are consistent with the corresponding continuum contact theories, which are Hertz model, Ggeenwood-Williamson (or Persson) model and Maugis-Dugdale model according to surface roughness and interfacial adhesion. We show that there are same relations between the real contact area and the repulsive force for both non-adhesive and adhesive contact, which means that the effect of adhesion on contact behavior can be equivalent to that of a virtual load. We demonstrate that the attractive force on contact interface increases with the real contact area in a power-law function, with a power exponent larger than 1 for the atomic-scale smooth tip and with a power exponent smaller than 1 for the atomic-scale rough tip.
Process Characteristics of Bioleaching Meizhou Chalcopyrite by Thermophilic Acidianus brierleyi
嗜热布氏酸菌对梅州黄铜矿的生物浸出过程特性

SHI Xian-ai,LI Cong-ying,LIN Hui,MENG Chun,GUO Yang-hao,
石贤爱
,李聪颖,林晖,孟春,郭养浩

过程工程学报 , 2005,
Abstract: 研究了嗜热布氏酸菌对梅州黄铜矿的浸出机理和浸出过程特性.嗜热布氏酸菌(简称A.B菌)在梅州黄铜矿表面的吸附过程符合朗格缪尔等温线,最大吸附量XAm5.00×108cell/g,吸附平衡常数KA5.88×10?7mL/cell.梅州黄铜矿的浸出主要是通过A.B菌的直接氧化起作用.单独A.B菌处理时,铜浸出速率为0.0137g/(L?h),是Fe3+化学氧化速率的6倍.A.B菌(65℃)对梅州黄铜矿的浸出速率是常温氧化亚铁硫杆菌(简称T.F)的16倍(31℃).A.B菌生长和浸矿的最适温度均为65℃,微生物生长最佳pH为2.0,而浸矿最适pH为1.5.A.B菌处理10d可使铜浸出率达91.3%,具有潜在的工业应用价值.
Approach to building extraction based on two-way fusion mechanism
基于双向融合机制的建筑目标检测方法*

JIN Tai-song,WANG Zhe-shen,YE Cong-ying,LI Cui-hua,
金泰松
,汪哲慎,叶聪颖,李翠华

计算机应用研究 , 2008,
Abstract: This paper proposed an approach called two-way fusion mechanism, which detected the interested building in the image, it imitated the detection process of human vision, in which searching subjectively and being attracted objectively happened at the same time, Through the bottom-up methods which utilized visual salience model and the top-down methods based on environmental perception technology, the regions where building exist were marked in the image. Experiment on natural images validates that this mechanism has competitive accuracy in building detection in complex scene and favorable speed, and satisfies the requirement of processing the natural image.
Clinical application of real-time three-dimensional (four-dimensional )echocardiography in fetal heart scanning
胎儿实时三维(四维)超声心动图的初步临床应用

GU Li-li,LI Sheng-li,WEN Hua-xuan,CHEN Cong-ying,YAO Yuan,WANG Yin,
顾莉莉
,李胜利,文华轩,陈琮瑛,姚远,王银

中华医学超声杂志(电子版) , 2011,
Abstract: 目的 以胎儿四腔心容积为基础,通过后处理,与二维超声比较,探讨胎儿四维超声心动图在显示正常胎儿心脏和先天性心脏畸形胎儿中的临床应用。方法 对108例孕妇行胎儿心脏四维超声检查,其中84例心脏正常、24例先天心脏畸形。显示胎儿四腔心切面后启动四维容积扫查获得心脏灰阶容积和彩色多普勒血流容积,将图像储存后进行后处理。获取容积与后处理由同一医师完成。利用上述容积显示如下结构:四腔心(4C)、左心室流出道(LVOT)、右心室流出道(RVOT)、三血管气管(3VT)、二尖瓣(MV)、三尖瓣(TV)、主动脉(AO)、肺动脉(MPA)、主动脉弓(ARCH)、动脉导管(DA)。比较正常胎儿孕周≥28周和<28周胎儿在不同四腔心初始位置下对同一结构显示率的差异。所有四维超声心动图的诊断结果与二维超声比较,其中11例先天心脏畸形经产后解剖或生后超声心动图证实。结果 108例胎儿均获得心脏四维容积数据(100%)。每个对象扫查时间(7.53±2.37)min,5 s/容积。四腔心与房室瓣显示率100%。除主动脉弓外,心脏正常胎儿孕周≥28周对上述心脏结构的显示率高于<28周胎儿(P<0.05);除三血管气管切面外,心脏初始位置为心尖四腔心时对上述切面的显示率高于横位四腔心和心底四腔心(P<0.05)。孕周与胎心初始位置对显示率有显著影响,孕周大、初始位置为心尖四腔心切面获取成功率较高。先天性心脏畸形胎儿24例,四维超声心动图在显示瓣膜、瓣环及心脏间隔上显示出优势。结论 以四腔心为基础切面能够快速获取胎儿心脏容积,并能较为完整地评价胎儿心脏结构。胎儿四维超声心动图在显示复杂胎儿心脏异常中起到一定的作用。
Genetic variations of the porcine PRKAG3 gene in Chinese indigenous pig breeds
Lu-Sheng Huang, Jun-Wu Ma, Jun Ren, Neng-Shui Ding, Yuan-Mei Guo, Hua-Shui Ai, Lin Li, Li-Hua Zhou, Cong-Ying Chen
Genetics Selection Evolution , 2004, DOI: 10.1186/1297-9686-36-4-481
Abstract: (To access the full article, please see PDF)
Analysis of genetic sonogram markers for fetus with Down syndrome
唐氏综合征胎儿遗传学超声指标分析

CHEN Cong-ying,LI Sheng-li,WEN Hua-xuan,OUYANG Shu-yuan,BI Jing-ru,YE Qiao-mei,LIAO Yu-mei,
陈琮瑛
,李胜利,文华轩等

中华医学超声杂志(电子版) , 2010,
Abstract: 目的 分析唐氏综合征(DS)胎儿各项遗传学超声指标发生情况及超声特征,拟在中孕期通过遗传学超声检测各项指标来提高DS的产前筛查率.方法 通过对42例染色体核型分析证实为21-三体DS胎儿的产前、产后超声声像图进行研究分析各项遗传学超声指标.结果 42例DS胎儿中有88.1%(37/42)单独或合并存在结构畸形、鼻骨发育不良、颈项透明层或颈褶增厚、第5指中节指骨发育不良、股骨肱骨短、肾盂分离、心室点状强回声、草鞋足等遗传学超声指标.结论 中孕期遗传学超声检测各项遗传学超声指标是提高DS胎儿产前筛查的一个有效措施.
Prenatal ultrasound diagnosis of abnormal origin of pulmonary artery from ascending aorta and review of the literature
肺动脉异常起源于升主动脉产前超声诊断并文献回顾

WEN Hua-xuan,LI Sheng-li,OUYANG Shu-yuan,CHEN Xiu-lan,LIAO Yu-mei,CHEN Cong-ying,YAO yuan,XIA Xun,
文华轩
,李胜利,欧阳淑媛等

中华医学超声杂志(电子版) , 2010,
Abstract: 目的 探讨肺动脉异常起源于升主动脉的产前超声图像特征.方法 回顾性分析产前超声诊断的2例左肺动脉异常起源于升主动脉胎儿临床资料,总结肺动脉异常起源于升主动脉产前超声诊断特点,与引产后胎儿的高频超声及病理解剖结果进行对比,并对国内外相关文献进行回顾分析.结果 2例产前超声诊断左肺动脉异常起源于升主动脉均经尸体解剖证实,近端型与远端型各1例,1例合并法洛四联症,右位主动脉弓,动脉导管缺如;1例合并肺动脉瓣缺如,室间隔缺损,永存左上腔静脉,三尖瓣反流,右心增大.2例羊水染色体核型均正常.结论 肺动脉异常起源于升主动脉有特征性超声表现,产前超声检查可作出诊断.
Characteristics of Bioleaching of Zijin Copper Ore by Acidianus brierleyi
布氏酸菌浸出紫金山铜矿过程特性

LI Cong-ying,MENG Chun,LIN Hui,CHEN Shou-qing,SUN Jie,GUO Yang-hao,ZOU Lai-chang,
李聪颖
,孟春,林辉,陈首卿,孙洁,郭养浩,邹来昌

过程工程学报 , 2004,
Abstract: 研究了布氏酸菌浸出紫金山铜矿过程的特性.考察了初始pH、接种量和矿浆浓度对浸出率的影响,表明布氏酸菌浸出的最佳操作条件为pH2.0、接种量10%、矿浆浓度5%.探讨了布氏酸菌的浸出机理,紫金山铜矿的浸出是细菌直接氧化和Fe^3 化学氧化复合作用的结果.布氏酸菌(65℃)对紫金山铜矿的浸出能力强,是氧化亚铁硫杆菌(31℃)的1.7倍,具有良好的工业应用前景.
Prenatal diagnosis of diastematomyelia by ultrasound and review of the literature
脊髓纵裂产前超声诊断并文献回顾

WEN Hua-xuan,LI Sheng-li,CHEN Xiu-lan,OUYANG Shu-yuan,CHEN Cong-ying,YAO Yuan,LIAO Yu-mei,XIA Xun,
文华轩
,李胜利,陈秀兰,欧阳淑媛,陈琮瑛,姚远,廖玉媚,夏珣

中华医学超声杂志(电子版) , 2010,
Abstract: Objective To investigate the prenatal ultrasonic manifestations of diastematomyelia. Methods A fetus was identified as diastematomyelia after took detailed antenatal ultrasound examination for Suspected intraspinal tumor. The prenatal ultrasonic manifestations of the abnormal spinal anatomy were com- pared with the features of the postnatal high-frequency ultrasound, X-ray, MRI and autopsy examinations. Twenty-five cases of diastematomyelia were reviewed and retrieved by PubMed system. Results In our case, the ultrasonic examination revealed a circular hyper-echogenic mass in the enlarged spinal canal, infe- rior fusion of two longitudinal divisions of the thoracic cord, and the widening ossification center at the T6-3~9 level. The chromosomal analysis on cord blood cell had normal karyotype, which was confirmed by postmor- tem X-ray, MRI and autopsy. Conclusion Diastematomyelia can be prenatally diagnosed due to the charac- teristic ultrasonic features.
Value of fetal nasal bone in prenatal sereening Doun syndrome fetus by ultrasonography
胎儿鼻骨超声检查对唐氏综合征产前筛查的价值

CHEN Cong-ying,LI Sheng-li,WEN Hua-xuan,OUYANG Shu-yuan,BI Jing-ru,CHEN Xiu-lan,LIAO Yu-mei,
陈琮瑛
,李胜利,文华轩,欧阳淑媛,毕静茹,陈秀兰,廖玉媚

中华医学超声杂志(电子版) , 2010,
Abstract: Objective To study nasal bone of Down syndrome(DS) fetus by prenatal and postnatal ultrasonography and try to increase the screening rate of DS fetus by prenatal ultrasonography.Methods The prenatal nasal bone sonograms in a total of 42 cases with trisomy 21 and 240 cases chromosomal normal confirmed by karyotyping and postnatal nasal bone sonograms of 30 cases with DS fetus were retrospectively analyzed.Nasal bone length was measured on the mid-sagittal view of the fetal profile.Results The nasal bone leng...
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