期刊文献+
共找到5篇文章
< 1 >
每页显示 20 50 100
地下空间顶部塌落产生高压气浪的理论分析 被引量:8
1
作者 郑志辉 查支祥 《隧道建设》 2004年第1期15-16,19,共3页
提出了一维Lagrange粘性差分格式 ,建立了一个有效的计算模型 ,对空腔的底部压力、风速进行了计算分析 。
关键词 地下空间 顶部塌落 高压气浪 Lagrange粘性差分格式 气动力学 质量守恒方程 动量守恒方程 边界条件
下载PDF
矿石垫层消波分析实验 被引量:6
2
作者 郑志辉 王秉正 +1 位作者 周立端 杨治国 《中国矿业》 北大核心 2004年第5期47-50,共4页
在激波管内充填高压气体模拟矿顶冒落后产生的高压气浪 ,充填块石模拟矿石垫层。对不同厚度、不同孔隙率的垫层的消波作用进行了试验 ,并在矿山进行了现场实验 ,得出了一致的规律。获得了垫层厚度的确定方法。
关键词 冒落 高压气浪 矿石垫层 消波
下载PDF
螺旋CT在肺挫裂伤诊断中的应用价值
3
作者 马国刚 任际光 +1 位作者 胡晓嫔 梁金瑞 《实用医技杂志》 2011年第11期1147-1148,共2页
肺挫裂伤是比较严重的胸部损伤,肺挫裂伤可由直接撞击外伤或高压气浪伤所致,可发生于外伤着力处,亦可发生于对冲部位。主要病理变化为肺间质或肺实质内的液体渗出、肺组织裂伤和囊肿或血肿形成。收集我院经临床、X线和CT追踪观察确... 肺挫裂伤是比较严重的胸部损伤,肺挫裂伤可由直接撞击外伤或高压气浪伤所致,可发生于外伤着力处,亦可发生于对冲部位。主要病理变化为肺间质或肺实质内的液体渗出、肺组织裂伤和囊肿或血肿形成。收集我院经临床、X线和CT追踪观察确诊的肺挫裂伤患者41例,将不同的CT表现进行了分析总结,旨在探讨CT表现与病理改变之间的关系以及对肺挫裂伤诊断的价值。 展开更多
关键词 肺挫裂伤 螺旋CT 价值 诊断 应用 CT表现 胸部损伤 高压气浪
下载PDF
Clinical value of liver and spleen shear wave velocity in predicting the prognosis of patients with portal hypertension 被引量:1
4
作者 Yan Zhang Da-Feng Mao +1 位作者 Mei-Wu Zhang Xiao-Xiang Fan 《World Journal of Gastroenterology》 SCIE CAS 2017年第45期8044-8052,共9页
AIM To explore the relationship of liver and spleen shear wave velocity in patients with liver cirrhosis combined with portal hypertension,and assess the value of liver and spleen shear wave velocity in predicting the... AIM To explore the relationship of liver and spleen shear wave velocity in patients with liver cirrhosis combined with portal hypertension,and assess the value of liver and spleen shear wave velocity in predicting the prognosis of patients with portal hypertension.METHODS All 67 patients with liver cirrhosis diagnosed as portal hypertension by hepatic venous pressure gradient in our hospital from June 2014 to December 2014 were enrolled into this study. The baseline information of these patients was recorded. Furthermore,67 patients were followed-up at 20 mo after treatment,and liver and spleen shear wave velocity were measured by acoustic radiation force impulse at the 1^(st) week,3^(rd) month and 9^(th) month after treatment. Patients with favorable prognosis were assigned into the favorable prognosis group,while patients with unfavorable prognosis were assigned into the unfavorable prognosis group. The variation and difference in liver and spleen shear wave velocity in these two groups were analyzed by repeated measurement analysis of variance. Meanwhile,in order to evaluate the effect of liver and spleen shear wave velocity on the prognosis of patients with portal hypertension,Cox's proportional hazard regression model analysis was applied. The ability of those factors in predicting the prognosis of patients with portal hypertension was calculated through receiver operating characteristic(ROC) curves.RESULTS The liver and spleen shear wave velocity in the favorable prognosis group revealed a clear decline,while those in the unfavorable prognosis group revealed an increasing tendency at different time points. Furthermore,liver and spleen shear wave velocity was higher in the unfavorable prognosis group,compared with the favorable prognosis group; the differences were statistically significant(P < 0.05). The prognosis of patients with portal hypertension was significantly affected by spleen hardness at the 3^(rd) month after treatment [relative risk(RR) = 3.481]. At the 9^(th) month after treatment,the prognosis was affected by liver hardness(RR = 5.241) and spleen hardness(RR = 7.829). The differences between these two groups were statistically significant(P < 0.05). The ROC analysis revealed that the area under the curve(AUC) of spleen hardness at the 3^(rd) month after treatment was 0.644,while the AUCs of liver and spleen hardness at the 9^(th) month were 0.579 and 0.776,respectively. These might predict the prognosis of patients with portal hypertension.CONCLUSION Spleen hardness at the 3^(rd) month and liver and spleen shear wave velocity at the 9^(th) month may be used to assess the prognosis of patients with portal hypertension. This is hoped to be used as an indicator of predicting the prognosis of patients with portal hypertension. 展开更多
关键词 Liver cirrhosis Portal hypertension Liver and spleen shear wave velocity Acoustic radiation force impulse
下载PDF
颅脑损伤患者如何进行康复治疗
5
《健康必读(健康新语)》 2013年第1期38-38,共1页
颅脑损伤是指头颅部、特别是脑的损伤,是一种常见的创伤,在全身各部位损伤中,其发生率仅次于四肢损伤。损伤原因为暴力直接或间接作用于头部:平时常见于交通事故、失足坠落等;战时见于爆炸形成的高压气浪冲击,工事或建筑物倒塌及... 颅脑损伤是指头颅部、特别是脑的损伤,是一种常见的创伤,在全身各部位损伤中,其发生率仅次于四肢损伤。损伤原因为暴力直接或间接作用于头部:平时常见于交通事故、失足坠落等;战时见于爆炸形成的高压气浪冲击,工事或建筑物倒塌及火器、利器伤等。患者伤情复杂严重,死亡率高,经抢救治疗,大部分患者虽然幸存下来,但常遗留有不同程度的神经功能障碍,诸如意识、运动、感觉、言语、认知功能、排便排尿等方面的障碍。这些障碍都可以影响患者的生活和工作,给病人及其家庭带来痛苦和困难,同时也给国家造成很大负担。 展开更多
关键词 颅脑损伤患者 康复治疗 神经功能障碍 四肢损伤 交通事故 间接作用 损伤原因 高压气浪
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部