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Search Results: 1 - 10 of 332484 matches for " 潘爽<br>LI Jing "
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根尖孔大小对牙髓组织再生及牙齿抗压强度的影响
Effect of Apical Foramen Sizes on Dental Pulp Tissue Regeneration and Teeth Compressive Strength

李静, 孔丽欣, 沈帅, 王璐瑶, 牛玉梅, <br>LI Jing, KONG Li-Xin, SHEN Shuai, WANG Lu-Yao, NIU Yu-Mei, PAN Shuang
- , 2018, DOI: 10.13701/j.cnki.kqyxyj.2018.08.010
Abstract: 摘要 目的:探讨根尖孔大小对牙髓组织再生及牙齿抗压强度的影响。方法:收集因正畸拔除的牙根发育完成、 无牙根折裂的单根下前磨牙,离体牙截冠后,保留12 mm牙根,随机分为5组,每组25颗牙,根管预备至不同主锉号数,分别为30#、40#、60#、80#及100#主锉组,其中30#主锉组为对照组。体外培养人牙髓干细胞并接种于0.25%水凝胶支架中,将其分别注入不同主锉预备过的根管内,每组均取5颗牙,其牙根于Transwell小室分别培养14、21、28 d,提取水凝胶中细胞的总RNA,进行实时定量聚合酶链反应(real-time polymerase chain reaction,Real-time PCR)检测;每组余下的10颗牙,其牙根冠部封闭后植入裸鼠皮下,28 d后取出,5颗进行组织学观察,5颗进行静态载荷实验。结果:Real-time PCR检测牙本质涎磷蛋白(dentin sialophosphoprotein, dspp)、牙本质基质蛋白-1(dentin matrix protein-1, dmp-1)的表达,第28天时,各实验组均高于对照组(P<0.05),且40#主锉组高于其它实验组(P<0.05)。组织学分析表明,30#、40#、60#主锉组均未见连续的牙髓样组织形成,80#、100#主锉组可见组织形成,但未表现出典型牙髓样组织结构。静态载荷实验结果表明,40#主锉组的平均抗压载荷与对照组比较差异无统计学意义,其它实验组均低于对照组(P<0.05)。结论:根尖孔预备至100#(1 mm)以内时,根尖孔大小对牙髓组织再生没有明显影响,但根尖孔预备大于40#时,抗压强度明显下降
黄瓜籽正丁醇提取物对人牙髓干细胞增殖及成牙向分化的影响
Effects of N-butanol Extract of Cucumissativus Seeds on Proliferation and Odontogenic Differentiation of Human Dental Pulp Stem Cells.

车静怡, 李艳萍, , 何丽娜, 牛玉梅<br>CHE Jing-yi, LI Yan-ping, PAN Shuang, HE Li-na, NIU Yu-mei
- , 2018, DOI: 10.13701/j.cnki.kqyxyj.2018.04.011
Abstract: 摘要 目的:探讨黄瓜籽正丁醇提取物(n-butanol extract of cucumis sativus seeds,CSB)对人牙髓干细胞(human dental pulp stem cells,hDPSCs)增殖及成牙向分化能力的影响。方法:体外扩增培养hDPSCs,采用细胞计数法(cell counting kit-8,CCK-8)法检测CSB对hDPSCs增殖能力的影响;通过碱性磷酸酶(ALP)染色及活性测定、Western blot检测牙本质涎磷蛋白(dentin sialophosphoprotein,DSPP)和Ⅰ型胶原(collagen Ⅰ,COL Ⅰ)等矿化相关蛋白的表达水平观察细胞成牙向分化能力的变化。结果:CCK-8结果显示,与对照组相比,100 mg/L CSB可显著促进hDPSCs的增殖(P<0.05),500 mg/L组则明显抑制hDPSCs的增殖(P<0.05);经矿化诱导后,100 mg/L CSB组ALP染色明显加深,活性显著升高(P<0.05);Western blot结果显示100 mg/L CSB组DSPP和COL Ⅰ的表达均高于对照组(P<0.05)。结论:适宜浓度的CSB可促进hDPSCs的增殖及成牙向分化
A Combinatorial Stereo Vision Algorithm Implemented as Neural Nets
一种神经网络体视协同算法

Li Wenbiao,Ning Jing,Pan Shixian,<br>李文彪,宁静,士先
自动化学报 , 1998,
Abstract: Described here is a combinatorial multiresolution stereo vision algorithm. In the algorithm, dyadic orthogonal wavelet is used for multiresolution decomposition, and, a matching while reconstruction strategy is taken, in which matching and surface reconstruction correct each other and proceed cooperatively. The algorithm is implemented in the form of neural nets, mainly, Hopfield net. Results of primary tests show its rationality and effectiveness.
Comparison of Climate Characteristics Between Two Summer Monsoon Troughs over the South China Sea and India
夏季南海季风槽与印度季风槽的气候特征之比较

PAN Jing,LI Chong-Yin,<br>,李崇银
大气科学 , 2006,
Abstract: The Asian summer monsoon trough consists of two major components: the South China Sea(SCS) summer monsoon trough and the Indian summer monsoon trough.Although they both belong to the tropical monsoon systems,and carry the characteristics of the tropical convergence zones,there are significant differences and similarities due to the geographic locations,land/sea,impressed systems,etc.From a climate perspective,this paper focuses on the structural similarities and differences between the South China Sea and Indian monsoon troughs,and also addresses the differences in the evolution of the troughs.First,the similarities and differences of the three dimensional configurations of the two troughs are presented.The results show there are no significant differences between these two troughs.Both carry the characterisics of the tropical convergence zones,that is,convergence in the tough area in the low layers,divergence in the high layers and monsoon vertical circulations.In regard to the thermal feature,it is cold in the trough zones in the low layers and warm in the medium and high layers.The Indian summer monsoon trough is stronger than the SCS one in most factors.Second,the climatological evolution characteristics of both troughs are analyzed.The results show that the occurrence of the summer monsoon trough is in accordance with the monsoon onset.The SCS summer monsoon trough occurs early,retreats late and maintains longer,while the Indian summer monsoon trough occurs late,retreats quickly and maintains shorter.There are also some differences in the temperature and humidity evolution process.
Progress on the MJO Research in Recent Years
MJO研究新进展

LI Chongyin,PAN Jing,SONG Jie,<br>李崇银,,宋洁
大气科学 , 2013,
Abstract: MJO与ENSO的关系、MJO的数值模拟(预报)以及MJO对天气气候的影响是近些年来国内外大气科学研究的重要前沿问题。本文将综合介绍国内有关MJO对天气气候的影响以及MJO的数值模拟(预报)方面的近期研究进展,因为过去已介绍过MJO与ENSO相互作用的研究结果。利用澳大利亚气象局的RMM-MJO指数研究MJO与西北太平洋台风活动的关系,结果表明大气MJO对西北太平洋台风的生成有比较明显的调制作用,在MJO的活跃期与非活跃期西北太平洋生成台风数的比例为2:1;而在MJO活跃期,对流中心位于赤道东印度洋(即MJO第2、3位相)与对流中心在西太平洋地区(即MJO第5、6位相)时的比例也为2:1。对大气环流的合成分析显示,在MJO的不同位相西太平洋地区的动力因子和热源分布形势有极其明显不同。在第2、3位相,各种因子均呈现出抑制西太平洋地区对流及台风发展的态势;而在第5、6位相则明显有促进对流发生发展,并为台风生成和发展创造了有利的大尺度环流动力场。对多台风年与少台风年850 hPa的30~60 d低频动能距平的合成分析表明,在多台风年最显著的是低频动能正异常位于菲律宾以东15°N以南的西北太平洋地区,表明那里有强MJO的活动;而少台风年的情况与多台风年相反,菲律宾以东的西北太平洋上与季风槽位置对应区域是低频动能的负距平区,那里MJO偏弱。即赤道西北太平洋上MJO活动的强(弱)年对应西北太平洋的台风偏多(偏少)。对应MJO的不同活动位相,无论冬季、春季或夏季,中国东部的降水都将出现特殊的异常形势。在春季,MJO的第2、3位相有利我国东部长江中下游地区多雨、华南地区少雨;MJO的第4、5位相有利我国华南地区多雨而长江中下游地区少雨;在MJO的其它位相,我国东部地区都为降水负异常。在冬季,对应MJO的第1~3位相(特别是第2、3位相)中国华南降水偏多;而对应MJO的第6~8位相(特别是第6、7位相)中国华南降水偏少。在夏季,MJO位于印度洋时,MJO可以通过低层西风急流的波导效应影响到中国东南部地区,造成该地区降水偏多;当MJO位于西太平洋地区时,可以造成经向环流的上升支向北偏移,导致西北太平洋副高的东撤、以及中国东南部地区水汽输送减弱,降水减少。资料分析还表明,在年际变化尺度上,热带中、东印度洋MJO指数的持续异常对云南夏季降水有明显的影响。大气环流和数值模拟都表明,MJO活动
The Modulation of Madden Julian Oscillation on Typhoons in the Northwestern Pacific Ocean
热带大气季节内振荡对西北太平洋台风的调制作用

PAN Jing,LI Chongyin,SONG Jie,<br>,李崇银,宋洁
大气科学 , 2010,
Abstract: 利用澳大利亚气象局的RMM-MJO (Real-time Multivariate MJO) 指数, 分析研究了热带大气季节内振荡 (简称MJO) 对西北太平洋台风的调制作用及其机理, 结果表明MJO活动对西北太平洋台风的生成有比较明显调制作用。在MJO活跃期, 对流中心位于赤道东印度洋 (即MJO第2、3位相) 和对流中心越过海洋性大陆来到西太平洋地区 (即MJO 第5、6位相) 时台风生成的个数比例为2∶1。本文对西太平洋地区的大气环流场进行了多种气象要素的合成分析, 在MJO的不同位相, 西太平洋地区的动力因子分布形势有很明显不同。在第2、3位相, 各种因子均呈现出抑制西太平洋地区对流及台风发展的态势; 而在第5、6位相则明显有促进对流发生发展, 为台风生成和发展创造了有利条件的大尺度环流动力场。这说明MJO 在不断东移的过程中, 将改变大气环流形势, 最终影响了台风的生成和发展。接着, 我们从积云对流这个联系台风和MJO的重要因子出发, 研究了不同MJO位相时凝结加热的水平和垂直分布, 以及与台风环流、 水汽通量的配置情况。结果表明在MJO不同位相, 热源分布明显不同, 而这种水平和垂直方向的不同分布特征必然反映潜热释放和有效位能向有效动能转换的差异, 再与水汽的辐合辐散相配合, 就从台风获得的能量角度揭示了大气MJO调节台风的生成和发展, 造成不同位相时台风生成有根本差别的原因。
The Relationship Between the Intraseasonal Oscillations in the Northern Hemisphere During the Boreal Winter in the Stratosphere and Troposphere
冬季北半球平流层季节内振荡与对流层季节内振荡的关系

LI Chong-Yin,CHENG Sheng,PAN Jing,<br>李崇银,程胜,
大气科学 , 2006,
Abstract: 通过平流层大气ISO与对流层大气ISO的比较分析,发现在中高纬地区平流层大气ISO与对流层大气ISO有着许多相同点。北半球冬半年平流层大气环流主要低频模态也可认为是北极涛动(AO),其空间分布的主要特征为;高纬度地区与中低纬度地区为反位相变化,北极地区附近具有最大的变化值;其季节内振荡的正位相对应于AO增强,负位相对应于AO减弱。北半球冬半年平流层100 hPa和70 hPa位势高度场的低频遥相关分析表明,北极地区(概指北纬60°N以北)和北半球其他大部分地区呈负相关,北极涛动扮演了非常重要的角色。同时,北半球冬半年平流层的主要低频波列是从欧亚大陆中部到西北太平洋,并且由纬向型低频波列(欧亚大陆西伯利亚太平洋)和经向型低频波列(欧亚大陆北极太平洋)共同构成。平流层30 hPa和对流层500 hPa上经过带通滤波(15~90 d)位势高度场的EOF第一主分量的形势有十分类似的特征,它们对应的时间系数序列有显著的延迟相关关系。因此可以认为,北半球平流层大气ISO的变化要先于对流层大气,在滞后35 d左右其相关系数达到最大。大气环流模式(SAMIL)的数值模拟试验结果也表明,平流层的低频扰动可以在14 d之后便在对流层500 hPa上激发出低频响应,其谱峰在30 d左右。这进一步表明,通过大气季节内振荡,平流层的异常可以影响到对流层。
The Interannual Variation of the South China Sea Summer Monsoon Trough and Its Impact
南海夏季风槽的年际变化和影响研究

LI Chong-Yin,PAN Jing,<br>李崇银,
大气科学 , 2007,
Abstract: The South China Sea summer monsoon trough(SCSSMT) is an important part of the South China Sea summer monsoon system.It has distinct characteristics of interannual variation,which has important impacts on the summer circulation of China.In this paper,an intensity index of SCSSMT is brought forward first.Then strong and weak monsoon trough years are classified according to the index,and different variables of the background circulations associated with strong/weak monsoon trough years are synthesized.The synthesized results show that there exist quite different background fields,such as general atmospheric circulation,convective actions and SST in different monsoon trough years.It can be conferred that the monsoon trough anomaly,that is,anomalous strong/weak monsoon trough,is connected to the background fields.The impact of the monsoon trough anomaly on the precipitation of China is also discussed,which shows that anomalous South China Sea summer monsoon trough not only influences the precipitation in China,but also makes a remote impact on the circulation of the other areas in the Northern Hemisphere through teleconnection process.
Cause and Anomalous Characteristics of the South China Sea Monsoon Trough Producing Heavy Rainfall in South China
一次引发华南大暴雨的南海季风槽异常特征及其原因分析

YANG Hui,LI Chongyin,PAN Jing,<br>杨辉,李崇银,
气候与环境研究 , 2011,
Abstract: Atmospheric processes associated with the South China Sea (SCS) monsoon trough which caused the heavy rainfall in pentad 3 of August 2007 in South China are analyzed using the reanalysis data of NCEP and satellite images. The results indicate that the Asian summer monsoon trough has independent space structure,convergence in the low layers and divergence in the high layers are in the south of the Asian summer monsoon trough. The climate analysis shows that both the Indian monsoon trough and the SCS monsoon ...
Relationship between Interdecadal Variation of North Pacific-Equatorial Indian Ocean SST and Transition of Rainfall Pattern in East China around the 1970s
太平洋—印度洋海温与我国东部旱涝型年代际变化的关系

GU Wei,LI Chong-Yin,PAN Jing,<br>顾薇,李崇银,
气候与环境研究 , 2007,
Abstract: Orthogonal wavelet analysis of summer rainfall in East China showed its opposite spatial pattern before and after the 1970s,mainly the opposite situation of precipitation in North China and in the middle and lower reaches of the Yangtze River.The difference of meridional position of the summer East Asian upper-tropospheric Jet Stream(EAJS) and West Pacific Subtropical High(WPSH) before and after the 1970s was one of the most important reasons for the transition of summer rainfall pattern.Besides,on interdecadal time scales,North Pacific and Tropical Indian Ocean Sea Surface Temperature Anomaly(SSTA) variated coherently,and were closely related to the transition of summer rainfall pattern in East China.What's more,North Pacific-Equatorial Indian Ocean Sea Surface Temperatures(SST)showed a certain relationship with the north-south movement of EAJS and WPSH on both interannual and interdecadal time scales.Thus,North Pacific-Equatorial Indian Ocean SST was indeed an important factor for the prediction of summer rainfall pattern in East China.
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