The geological and physico-mechanical properties characterization of deep soft rocks is one of the critical scientific issues for deep soft rock engineering. In the present study, X-ray diffraction(XRD) analysis,scann...The geological and physico-mechanical properties characterization of deep soft rocks is one of the critical scientific issues for deep soft rock engineering. In the present study, X-ray diffraction(XRD) analysis,scanning electron microscope(SEM), and mercury intrusion porosimetry experiments were carried out to investigate the mineral compositions, microstructure and porosity characteristics of the 13 claybearing soft rock samples collected from a deep coal mine in China. Water vapor absorption and uniaxial compressive experiments were also performed to examine water absorption characteristics and waterinduced strength degradation effect of the investigated deep soft rock samples. The results show that the dominant mineral components in mudstone, coarse sandstone and fine sandstone samples were calcite, quartz and clay respectively. The contents of clay minerals in all samples were relatively high and ranged from 12.3%(N-4) to 56.5%(XS-1). Water vapor absorption processes of all the soft rock samples follow an exponential law which is very similar to the water vapor absorption behavior of conglomerate samples reported in our earlier study. Correlation analyses also suggested that there were good positive correlation relationships between water absorptivity and clay minerals for both mudstone and sandstone samples. Furthermore, it was found that vapor absorption was not correlated with the porosity for mudstone, however, positive correlation relationship was found between them for sandstone. Correlation analysis between UCS, modulus of elasticity and water content demonstrated that both of them tend to decrease with the increase of their water content due to water absorption.展开更多
目的探查热敏灸治疗脑卒中后痉挛性偏瘫患者热敏化穴位的分布情况,观察热敏灸治疗痉挛性偏瘫患者的临床疗效。方法将70例脑卒中后痉挛性偏瘫患者随机分为对照组和热敏灸组,每组35例;对照组采用常规康复治疗和针刺治疗,热敏灸组在对照组...目的探查热敏灸治疗脑卒中后痉挛性偏瘫患者热敏化穴位的分布情况,观察热敏灸治疗痉挛性偏瘫患者的临床疗效。方法将70例脑卒中后痉挛性偏瘫患者随机分为对照组和热敏灸组,每组35例;对照组采用常规康复治疗和针刺治疗,热敏灸组在对照组治疗基础上采用热敏灸治疗;观察热敏灸组患者热敏化穴位分布情况,比较两组患者治疗前后美国国立卫生研究院卒中量表(National Institute of Health stroke scale,NIHSS)评分和改良Rankin量表(modified Rankin scale,MRS)评分、徒手肌力检查(manual muscle testing,MMT)评分、Fugl-Meyer评估(Fugl-Meyer assessment,FMA)量表评分、Wolf运动功能测试(Wolf motor function test,WMFT)量表评分、日常生活活动能力(activity of daily living,ADL)量表评分、世界卫生组织生活质量简表(World Health Organization quality of life brief,WHOQOL-BREF)评分以及临床疗效。结果共有35例患者出现热敏化穴位现象,共出现119个热敏化穴位;热敏化穴位中出现频率最高的5个穴位依次为足三里、曲池、悬钟、外关和阳陵泉。热敏灸组NIHSS评分、MRS评分均显著低于对照组(P<0.05),MMT评分、FMA量表评分、WMFT量表评分、ADL量表评分、WHOQOL-BREF各维度评分均显著高于对照组(P<0.05)。热敏灸组临床疗效显著优于对照组(P<0.05)。结论热敏灸联合常规针刺和康复治疗脑卒中后痉挛性偏瘫,能够显著改善患者肢体功能障碍,提高生活质量,疗效确切;应用热敏灸治疗该病时可优先选择足三里、曲池、悬钟、外关、阳陵泉穴进行治疗。展开更多
基金provided by the National Natural Science Foundation of China (No. 51134005)the Specialized Research Fund for the Doctoral Program of Higher Education of China (No. 20130023120016)the Fundamental Research Funds for the Central Universities of China (No. 2010QL07)
文摘The geological and physico-mechanical properties characterization of deep soft rocks is one of the critical scientific issues for deep soft rock engineering. In the present study, X-ray diffraction(XRD) analysis,scanning electron microscope(SEM), and mercury intrusion porosimetry experiments were carried out to investigate the mineral compositions, microstructure and porosity characteristics of the 13 claybearing soft rock samples collected from a deep coal mine in China. Water vapor absorption and uniaxial compressive experiments were also performed to examine water absorption characteristics and waterinduced strength degradation effect of the investigated deep soft rock samples. The results show that the dominant mineral components in mudstone, coarse sandstone and fine sandstone samples were calcite, quartz and clay respectively. The contents of clay minerals in all samples were relatively high and ranged from 12.3%(N-4) to 56.5%(XS-1). Water vapor absorption processes of all the soft rock samples follow an exponential law which is very similar to the water vapor absorption behavior of conglomerate samples reported in our earlier study. Correlation analyses also suggested that there were good positive correlation relationships between water absorptivity and clay minerals for both mudstone and sandstone samples. Furthermore, it was found that vapor absorption was not correlated with the porosity for mudstone, however, positive correlation relationship was found between them for sandstone. Correlation analysis between UCS, modulus of elasticity and water content demonstrated that both of them tend to decrease with the increase of their water content due to water absorption.
文摘目的探查热敏灸治疗脑卒中后痉挛性偏瘫患者热敏化穴位的分布情况,观察热敏灸治疗痉挛性偏瘫患者的临床疗效。方法将70例脑卒中后痉挛性偏瘫患者随机分为对照组和热敏灸组,每组35例;对照组采用常规康复治疗和针刺治疗,热敏灸组在对照组治疗基础上采用热敏灸治疗;观察热敏灸组患者热敏化穴位分布情况,比较两组患者治疗前后美国国立卫生研究院卒中量表(National Institute of Health stroke scale,NIHSS)评分和改良Rankin量表(modified Rankin scale,MRS)评分、徒手肌力检查(manual muscle testing,MMT)评分、Fugl-Meyer评估(Fugl-Meyer assessment,FMA)量表评分、Wolf运动功能测试(Wolf motor function test,WMFT)量表评分、日常生活活动能力(activity of daily living,ADL)量表评分、世界卫生组织生活质量简表(World Health Organization quality of life brief,WHOQOL-BREF)评分以及临床疗效。结果共有35例患者出现热敏化穴位现象,共出现119个热敏化穴位;热敏化穴位中出现频率最高的5个穴位依次为足三里、曲池、悬钟、外关和阳陵泉。热敏灸组NIHSS评分、MRS评分均显著低于对照组(P<0.05),MMT评分、FMA量表评分、WMFT量表评分、ADL量表评分、WHOQOL-BREF各维度评分均显著高于对照组(P<0.05)。热敏灸组临床疗效显著优于对照组(P<0.05)。结论热敏灸联合常规针刺和康复治疗脑卒中后痉挛性偏瘫,能够显著改善患者肢体功能障碍,提高生活质量,疗效确切;应用热敏灸治疗该病时可优先选择足三里、曲池、悬钟、外关、阳陵泉穴进行治疗。
文摘牛奶中的蛋白质含量会影响牛奶的品质,利用高光谱图像的光谱特征信息研究对牛奶蛋白质含量预测的可行性。本文提出一种基于竞争性自适应重加权算法(competitive adaptive reweighted sampling, CARS)和连续投影算法(successive projections algorithm, SPA)结合多层前馈神经网络(back propagation, BP)的预测建模方法,实验以含有不同浓度蛋白质的牛奶为对象,利用可见光/近红外高光谱成像系统共采集到5种牛奶共计250组高光谱数据,通过实验对比选择采用标准化方法对获取到的吸收光谱预处理,然后采用CARS结合SPA筛选特征波长,得到18个特征波长,建立CARS-SPA-BP模型,经过试验,CARS-SPA-BP模型的训练集决定系数和测试集决定系数R;和R;分别达到0.971和0.968,训练集均方根误差(root mean square error of calibration,RMSEC)和测试集均方根误差(root mean square error of prediction,RMSEP)达到了0.033和0.034。研究发现,采用CARS结合SPA筛选的牛奶特征波长建立的多层前馈神经网络模型,其模型预测结果与全波长建模相比并没有明显降低,因此将CARS结合SPA用于波长筛选并且结合BP神经网络基本可以完成对牛奶蛋白质含量的预测。为验证CARS-SPA-BP模型的预测能力,在相同数据环境下,使用较为传统的偏最小二乘回归(partial least squares regression, PLSR)进行建模,实验结果表明,CARS-SPA-BP相较于PLSR,R;和RMSEP均有明显提升。研究表明,CARS-SPA-BP可充分利用牛奶光谱特征信息实现较高精度的牛奶蛋白质含量检测。
