目的探讨跨理论模型预立医疗照护计划(advanced care planning,ACP)在晚期癌症患者中的应用效果。方法便利抽样法选取哈尔滨市某肿瘤医院治疗的109例晚期癌症患者为研究对象,按照入组时间分为干预组54例,对照组55例;对照组采用常规护理...目的探讨跨理论模型预立医疗照护计划(advanced care planning,ACP)在晚期癌症患者中的应用效果。方法便利抽样法选取哈尔滨市某肿瘤医院治疗的109例晚期癌症患者为研究对象,按照入组时间分为干预组54例,对照组55例;对照组采用常规护理方法,干预组在常规护理基础上实施1个月跨理论模型预立医疗照护计划干预。比较两组患者干预前后预立医疗照护计划准备度及死亡态度情况。结果干预组患者预立医疗照护计划准备度和死亡态度描绘(自然接受)评分均高于对照组(均P<0.05);死亡态度描绘(死亡恐惧、死亡逃避)评分均低于对照组(均P<0.05)。结论跨理论模型预立医疗照护计划干预能提高晚期癌症患者的ACP准备度,改善患者死亡态度,对晚期癌症患者具有重要意义。展开更多
This paper describes the deep rockburst simulation system to reproduce the granite instantaneous rockburst process.Based on the PIV(Particle Image Velocimetry)technique,quantitative analysis of a rockburst,the images ...This paper describes the deep rockburst simulation system to reproduce the granite instantaneous rockburst process.Based on the PIV(Particle Image Velocimetry)technique,quantitative analysis of a rockburst,the images of tracer particle,displacement and strain fields can be obtained,and the debris trajectory described.According to the observation of on-site tests,the dynamic rockburst is actually a gas–solid high speed flow process,which is caused by the interaction of rock fragments and surrounding air.With the help of analysis on high speed video and PIV images,the granite rockburst failure process is composed of six stages of platey fragment spalling and debris ejection.Meanwhile,the elastic energy for these six stages has been calculated to study the energy variation.The results indicate that the rockburst process can be summarized as:an initiating stage,intensive developing stage and gradual decay stage.This research will be helpful for our further understanding of the rockburst mechanism.展开更多
In order to understand failure mechanisms of the tunnel excavated in the stratified rock masses in deep mine, the physical modeling experiment by using the large-scale model was carried out. The field case simulated i...In order to understand failure mechanisms of the tunnel excavated in the stratified rock masses in deep mine, the physical modeling experiment by using the large-scale model was carried out. The field case simulated in the experiment is a main connection tunnel located at depth of 1000 m in Qishan coal mine,Xuzhou mining district. Tunnel deformation was monitored by using strain gauges and a video camera simultaneously. Crack initiation and propagation process during the test were analyzed based on image analysis of the captured video photographs. At the same time, deformation process of the key monitoring points around the tunnel section is given by the monitored strain plots. Under the increasing external loads, crack initiation occurs firstly on the left wall of the tunnel, then on the immediate roof.Complete failure of the tunnel occurs as a result of the slippage of the rock layers along the interfaces.展开更多
This paper presents an overview of experimental investigations conducted at China University of Mining and Technology Beijing(CUMTB) on roadway excavation using large-scale geomechanical model tests.The simulated sedi...This paper presents an overview of experimental investigations conducted at China University of Mining and Technology Beijing(CUMTB) on roadway excavation using large-scale geomechanical model tests.The simulated sedimentary rocks are composed by alternating layers of sandstone, mudstone and coal seam inclined at varied angles with respect to the horizontal including 0°, 45°, 60°, and 90°. During the excavation, infrared thermography was employed to detect the thermal response of the surrounding rocks under excavation. The obtained raw thermograms were processed using denoising algorithm, data reduction procedure and Fourier analysis. The infrared temperature(IRT) characterizes the overall rock response; the processed thermal images represent the structural behavior, and the Fourier spectrum describes damage development in the frequency domain. Deeper understanding was achieved by the comparative analyses of excavation in differently inclined rock masses using the image features of IRTs, thermal images and Fourier spectra.展开更多
文摘目的探讨跨理论模型预立医疗照护计划(advanced care planning,ACP)在晚期癌症患者中的应用效果。方法便利抽样法选取哈尔滨市某肿瘤医院治疗的109例晚期癌症患者为研究对象,按照入组时间分为干预组54例,对照组55例;对照组采用常规护理方法,干预组在常规护理基础上实施1个月跨理论模型预立医疗照护计划干预。比较两组患者干预前后预立医疗照护计划准备度及死亡态度情况。结果干预组患者预立医疗照护计划准备度和死亡态度描绘(自然接受)评分均高于对照组(均P<0.05);死亡态度描绘(死亡恐惧、死亡逃避)评分均低于对照组(均P<0.05)。结论跨理论模型预立医疗照护计划干预能提高晚期癌症患者的ACP准备度,改善患者死亡态度,对晚期癌症患者具有重要意义。
基金supported by the National Natural Science Foundation of China (No.41172270)National Basic Research Program (No.2011CB201201)
文摘This paper describes the deep rockburst simulation system to reproduce the granite instantaneous rockburst process.Based on the PIV(Particle Image Velocimetry)technique,quantitative analysis of a rockburst,the images of tracer particle,displacement and strain fields can be obtained,and the debris trajectory described.According to the observation of on-site tests,the dynamic rockburst is actually a gas–solid high speed flow process,which is caused by the interaction of rock fragments and surrounding air.With the help of analysis on high speed video and PIV images,the granite rockburst failure process is composed of six stages of platey fragment spalling and debris ejection.Meanwhile,the elastic energy for these six stages has been calculated to study the energy variation.The results indicate that the rockburst process can be summarized as:an initiating stage,intensive developing stage and gradual decay stage.This research will be helpful for our further understanding of the rockburst mechanism.
文摘In order to understand failure mechanisms of the tunnel excavated in the stratified rock masses in deep mine, the physical modeling experiment by using the large-scale model was carried out. The field case simulated in the experiment is a main connection tunnel located at depth of 1000 m in Qishan coal mine,Xuzhou mining district. Tunnel deformation was monitored by using strain gauges and a video camera simultaneously. Crack initiation and propagation process during the test were analyzed based on image analysis of the captured video photographs. At the same time, deformation process of the key monitoring points around the tunnel section is given by the monitored strain plots. Under the increasing external loads, crack initiation occurs firstly on the left wall of the tunnel, then on the immediate roof.Complete failure of the tunnel occurs as a result of the slippage of the rock layers along the interfaces.
基金provided by the Special Funds for the Major State Basic Research Project(No.2006CB202200)the Innovative Team Development Project of the state Educational Ministry of China(No.IRT0656)
文摘This paper presents an overview of experimental investigations conducted at China University of Mining and Technology Beijing(CUMTB) on roadway excavation using large-scale geomechanical model tests.The simulated sedimentary rocks are composed by alternating layers of sandstone, mudstone and coal seam inclined at varied angles with respect to the horizontal including 0°, 45°, 60°, and 90°. During the excavation, infrared thermography was employed to detect the thermal response of the surrounding rocks under excavation. The obtained raw thermograms were processed using denoising algorithm, data reduction procedure and Fourier analysis. The infrared temperature(IRT) characterizes the overall rock response; the processed thermal images represent the structural behavior, and the Fourier spectrum describes damage development in the frequency domain. Deeper understanding was achieved by the comparative analyses of excavation in differently inclined rock masses using the image features of IRTs, thermal images and Fourier spectra.
