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1989年3月特大电离层事件
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作者 何友文 《地球物理学报》 SCIE EI CAS CSCD 北大核心 1996年第S1期7-17,共11页
给出了1989年3月罕见的超级太阳活动区(NOAA,AR5395)的多次爆发,在远东地区诱发了一系列强烈的、甚至是首次观测到的电离层扰动事件:(1)重庆站以北地区TEC增量达55×10(16)el/m2的突增事件... 给出了1989年3月罕见的超级太阳活动区(NOAA,AR5395)的多次爆发,在远东地区诱发了一系列强烈的、甚至是首次观测到的电离层扰动事件:(1)重庆站以北地区TEC增量达55×10(16)el/m2的突增事件;同期武昌、仑坪和知本等站的TEC负增量达65×10(16)el/m2的突降事件;(2)兰州以南地区的强TID;(3)持续时间较长的Lacuna现象;(4)微粒E层事件等。作者结合同期远东和巴西地区的电离层扰动,多颗卫星探测结果和全球中低纬区极光的出现,对此次电离层事件的部分异常变化及其形成机制作了初步讨论,并指出东向电场剧增和粒子沉降可能是此次事件的主要因素。 展开更多
关键词 电离层暴 东向电场 微粒E层事件 TEC突增事件 TEC突降事件 TID Lacuna现象
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Aicardi syndrome:Neonatal diagnosis by means of transfontanellar ultrasound
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作者 Claudio Rodrigues Pires Edward Araujo Júnior +1 位作者 Adriano Czapkowski Sebastio Marques Zanforlin Filho 《World Journal of Radiology》 2014年第7期511-514,共4页
Aicardi syndrome is a rare genetic disease characterized by a characteristic classical trio of neurological clinical abnormalities(spasms),agenesis of the corpus callosum and ophthalmological abnormalities(chorioretin... Aicardi syndrome is a rare genetic disease characterized by a characteristic classical trio of neurological clinical abnormalities(spasms),agenesis of the corpus callosum and ophthalmological abnormalities(chorioretinal lacunae).The diagnosis can be suspected by prenatal ultrasound with color Doppler identifying the agenesis of the corpus callosum.Usually,the diagnosis is confirmed in the neonate period by transfontanellar ultrasound and ophthalmological examination.We present a case of newborn with Aicardi syndrome,being the transfontanellar identified partial dysgenesis of the corpus callosum and a cyst in the inter-hemispheric fissure.Ophthalmological examination showed bilateral chorioretinal lacunae. 展开更多
关键词 Aicardi syndrome NEONATE Agenesis of the corpus callosum Chorioretinal lacunae Transfontanellar ultrasound
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Effect of Shengsui Jiangu capsule on TNF-α, TGF-β1, and empty bone lacuna in rats with alcoholic osteoporosis
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作者 Shu-Jun Ren Jun-Tong Liu +4 位作者 Chang-Jiang Yu Lei Jiang Fu-Zhu Tan Yi-Wei Shen Xi-Lin Xu 《Journal of Hainan Medical University》 2022年第3期20-24,共5页
TGF-Objective:To investigate the effect of postgraduate Shengsui Jiangu Capsule on tumor necrosis factors TNF-α,transforming growth factor TGF-β1 and empty bone lacuna in rats with alcoholic osteoporosis.Method:120 ... TGF-Objective:To investigate the effect of postgraduate Shengsui Jiangu Capsule on tumor necrosis factors TNF-α,transforming growth factor TGF-β1 and empty bone lacuna in rats with alcoholic osteoporosis.Method:120 SD rats were randomly divided into 4 groups,30 rats in each group:blank group,model group,western medicine control group and traditional Chinese medicine intervention group.Liquor gavage was used to model the disease,except for the blank group.The western medicine control group was gavaged with a suspension of calcium carbonate and afad3,while the Chinese medicine intervention group was gavaged with a suspension of Shengsui Jiangu capsules combined with 0.9%saline solution injection.The values of TNF-αand TGF-β1 in femora were measured after 8,12,and 16 weeks of intervention.After dissecting out the femoral head using the HE(hematoxylin-eosin staining)staining method,the bone lacunae were observed under a light microscope,and the empty bone lacunae rate was calculated for intergroup comparison.Results:Compared with the blank group,the model group had a significantly higher percentage of TNF-αand empty bone lacunae,and a significantly lower percentage of TGF-β1(P<0.01).Compared with the model group,the rates of TNF-αand empty bone lacunae in the western medicine control group and the Chinese medicine intervention group were significantly decreased,and TGF-β1 was significantly increased(P<0.01).The traditional Chinese medicine intervention group was more effective than the western medicine control group(P<0.05).Conclusion:Shengsui Jiangu capsule attenuates the expression of TNF-α,enhances the expression of TGF-β1,decreases the rate of empty bone lacunae,and achieves a protective effect against alcoholic osteoporosis in rats with alcoholic osteoporosis. 展开更多
关键词 Alcoholic Osteoporosis Shengsui Jiangu capsule TNF-α TGF-β1 Empty bone lacuna
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Analysis of Flux of Gas Passing Circle Lacuna
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作者 ZHAO Shi-jun,SUN Ke-yu,YU Xiu-pingAutomation College, Harbin Engineering University,Harbin 150001,China 《哈尔滨工程大学学报(英文版)》 2002年第2期37-41,71,共6页
The rate of flow of the gas flowing through cirque chink often needs calculation in engineering. The characters of compressibility and thermodynamics have some effect on the gas flowing, so the analysis on the flow of... The rate of flow of the gas flowing through cirque chink often needs calculation in engineering. The characters of compressibility and thermodynamics have some effect on the gas flowing, so the analysis on the flow of gas is more complex than that of liquid. But under different conditions and different requirements of precision the analysis can be simplified suitably, then make the formulae given become simple subsequently. This paper analyzes various gas flux based on basic characters and motion laws of gas and the analysis is just applied in an engineering project. 展开更多
关键词 circle LACUNA COMPRESSIBLE FLUID INCOMPRESSIBLE FLUID density INERTIAL force
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SPECTRAL GAP SOLUTIONS OF THE DISSIPATIVE KIRCHHOFF EQUATION
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作者 S.PANIZZI 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2004年第1期73-86,共14页
The author proves that for initial data in a set S ? (H2(?) ∩ H0(?)) × H0(?), 1 1 unbounded in H0(?) × L2(?), the solut... The author proves that for initial data in a set S ? (H2(?) ∩ H0(?)) × H0(?), 1 1 unbounded in H0(?) × L2(?), the solutions of the Cauchy-Dirichlet problem for the 1 dissipative Kirchho? equation Z ?t u ? ν + L 2 | x u|2dx xu + δ?tu = 0 (x ∈ ?, t > 0), ? are global in [0,+∞) and decay exponentially. The functions in S do not satisfy any additional regularity assumption, instead they must satisfy a condition relating their energy with the largest lacuna in their Fourier expansion. The larger is the lacuna the larger is the energy allowed. 展开更多
关键词 Spectral gap solutions Dissipative Kirchhoff equation lacunae
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