Urban water supply network is a modern urban survival and development of the infrastructure of a city,and its normal running conditions have important significance. The actual hydraulic process in the variableload wat...Urban water supply network is a modern urban survival and development of the infrastructure of a city,and its normal running conditions have important significance. The actual hydraulic process in the variableload water distribution networks can be treated as the slow transient flow which belongs to the unsteady flow. This paper analyzes the multi-loops network slow transient model based on graph theory,and the link flow matrix is treated as the variables of the discrete solution model to simulate the process of the slow transient flow in the network. With the simulation of hydraulic regime in an actual pipe network,the changing laws of the flow in the pipes,nodal hydraulic heads and other hydraulic factors with the passage of time are obtained. Since the transient processes offer much more information than a steady process,the slow transient theory is not only practical on analyzing the hydraulic condition of the network,but also on identifying hydraulic resistance coefficients of pipes and detecting the leakage in networks.展开更多
目的观察内热针治疗早期股骨头缺血性坏死的临床效果。方法选取2017年1月-2018年12月在解放军总医院第一医学中心康复医学科就诊的Ficat分期为Ⅰ期和Ⅱ期的接受内热针治疗的股骨头缺血性坏死患者。内热针针刺部位为臀部和腹股沟,每个部...目的观察内热针治疗早期股骨头缺血性坏死的临床效果。方法选取2017年1月-2018年12月在解放军总医院第一医学中心康复医学科就诊的Ficat分期为Ⅰ期和Ⅱ期的接受内热针治疗的股骨头缺血性坏死患者。内热针针刺部位为臀部和腹股沟,每个部位治疗1次,间隔5 d,针刺后加热针体至43℃。记录治疗前、治疗后1个月、治疗后12个月时患者的视觉模拟评分(visual analogue scale,VAS)和Harris髋关节评分(Harris hip score,HHS)。结果21例股骨头缺血性坏死患者中男性15例,女性6例,平均年龄32.1(21~46)岁,Ficat分期Ⅰ期8例,Ⅱ期13例。治疗前、治疗后1个月、治疗后12个月,VAS评分分别为3.7±1.2、1.9±1.5、2.3±1.1,HHS总评分分别为50.6±13.8、73.7±8.6、69.7±13.3,治疗后1个月和治疗后12个月的VAS评分及HHS总评分与治疗前比较,差异有统计学意义(P均<0.01)。HSS评分中疼痛(19.05±8.3 vs 30.8±9.2)、髋关节功能(27.2±6.3 vs 32.9±7.0)、关节活动度(2.1±0.6 vs 3.0±1.1)三个子项目评分治疗后12个月较治疗前均显著提升,结果与总评分趋势一致(P均<0.01)。结论内热针疗法可改善FicatⅠ~Ⅱ期股骨头缺血性坏死患者的疼痛和下肢功能状态。展开更多
基金Sponsored by the National Natural Science Foundation of China(Grant No.50908064 and 51208158)the 46thChina Postdoctoral Science Foundation(Grant No.20090460912)
文摘Urban water supply network is a modern urban survival and development of the infrastructure of a city,and its normal running conditions have important significance. The actual hydraulic process in the variableload water distribution networks can be treated as the slow transient flow which belongs to the unsteady flow. This paper analyzes the multi-loops network slow transient model based on graph theory,and the link flow matrix is treated as the variables of the discrete solution model to simulate the process of the slow transient flow in the network. With the simulation of hydraulic regime in an actual pipe network,the changing laws of the flow in the pipes,nodal hydraulic heads and other hydraulic factors with the passage of time are obtained. Since the transient processes offer much more information than a steady process,the slow transient theory is not only practical on analyzing the hydraulic condition of the network,but also on identifying hydraulic resistance coefficients of pipes and detecting the leakage in networks.
文摘目的观察内热针治疗早期股骨头缺血性坏死的临床效果。方法选取2017年1月-2018年12月在解放军总医院第一医学中心康复医学科就诊的Ficat分期为Ⅰ期和Ⅱ期的接受内热针治疗的股骨头缺血性坏死患者。内热针针刺部位为臀部和腹股沟,每个部位治疗1次,间隔5 d,针刺后加热针体至43℃。记录治疗前、治疗后1个月、治疗后12个月时患者的视觉模拟评分(visual analogue scale,VAS)和Harris髋关节评分(Harris hip score,HHS)。结果21例股骨头缺血性坏死患者中男性15例,女性6例,平均年龄32.1(21~46)岁,Ficat分期Ⅰ期8例,Ⅱ期13例。治疗前、治疗后1个月、治疗后12个月,VAS评分分别为3.7±1.2、1.9±1.5、2.3±1.1,HHS总评分分别为50.6±13.8、73.7±8.6、69.7±13.3,治疗后1个月和治疗后12个月的VAS评分及HHS总评分与治疗前比较,差异有统计学意义(P均<0.01)。HSS评分中疼痛(19.05±8.3 vs 30.8±9.2)、髋关节功能(27.2±6.3 vs 32.9±7.0)、关节活动度(2.1±0.6 vs 3.0±1.1)三个子项目评分治疗后12个月较治疗前均显著提升,结果与总评分趋势一致(P均<0.01)。结论内热针疗法可改善FicatⅠ~Ⅱ期股骨头缺血性坏死患者的疼痛和下肢功能状态。
