The pressure profiles, gas velocities, solid circulation rate, solids flux, residence time distribution of gas and particles in chemical-looping combustion reactors and gas leakage were studied in a cold flow model un...The pressure profiles, gas velocities, solid circulation rate, solids flux, residence time distribution of gas and particles in chemical-looping combustion reactors and gas leakage were studied in a cold flow model unit. And these parameters in both air and fuel reactors were measured in the experimental stage. The experimental results show that gas fluidization velocity in the air reactor is 1.8 m/s, gas fluidization velocity in the fuel reactor 0.5 m/s, and the bed materials inventory of the two reactors between 1.2 to 3.15 kg. The first cold flow model results show that the solid circulation rates are sufficient. The appropriate operating conditions are optimized and the summary of final changes is made the on cold model. The proposed design solutions are currently being verified in a cold flow model simulating the actual reactor(hot) system. This paper presents an overview of the research performed on a cold flow model and highlights the current status of the technology.展开更多
The hydraulic automatic gauge control system using gap loop for cold mill was designed.The stiffness of HCW cold mill was defined for gap loop,and the dynamic model of gauge control system for gap loop was built with ...The hydraulic automatic gauge control system using gap loop for cold mill was designed.The stiffness of HCW cold mill was defined for gap loop,and the dynamic model of gauge control system for gap loop was built with mechanism analysis.The stiffness for gap loop and the cylinder displacement loop were measured.展开更多
目的分析比较冷圈套器息肉切除术(CSP)与套圈高频电切术治疗对小直径扁平无蒂结直肠息肉患者的影响。方法选择2024年10月至2025年2月山东大学齐鲁医院德州医院收治的采用CSP治疗的80例小直径扁平无蒂结直肠息肉患者纳入冷切组,另选取同...目的分析比较冷圈套器息肉切除术(CSP)与套圈高频电切术治疗对小直径扁平无蒂结直肠息肉患者的影响。方法选择2024年10月至2025年2月山东大学齐鲁医院德州医院收治的采用CSP治疗的80例小直径扁平无蒂结直肠息肉患者纳入冷切组,另选取同期采用套圈高频电切术治疗且性别、年龄匹配的80例小直径扁平无蒂结直肠息肉患者纳入电切组。比较两组手术相关指标(结肠镜操作时间、息肉完整切除率)、术后恢复时间(肛门排气、下床活动时间)、并发症(延迟出血、感染、即刻穿孔、延迟穿孔)总发生率、治疗总费用。比较两组术后2、8、12 h疼痛情况[视觉模拟评分法(VAS)]。结果与电切组比较,冷切组结肠镜操作时间及肛门排气时间更短(P<0.05),治疗总费用更少(P<0.05),术后2 h VAS评分更低(P<0.05);两组息肉完整切除率、下床活动时间、并发症总发生率及术后8 h、12 h VAS评分比较,差异无统计学意义(P>0.05)。结论CSP和套圈高频电切术治疗小直径扁平无蒂结直肠息肉患者效果相当,并发症发生风险低,其中CSP结肠镜操作时间更短,术后短时间内疼痛度更低,且治疗费用更低。展开更多
基金the National Key Technology Research&Development Program of 12th Five-year of China(No.2011BAD15B05)the National Natural Science Foundation of China(No.51076154)
文摘The pressure profiles, gas velocities, solid circulation rate, solids flux, residence time distribution of gas and particles in chemical-looping combustion reactors and gas leakage were studied in a cold flow model unit. And these parameters in both air and fuel reactors were measured in the experimental stage. The experimental results show that gas fluidization velocity in the air reactor is 1.8 m/s, gas fluidization velocity in the fuel reactor 0.5 m/s, and the bed materials inventory of the two reactors between 1.2 to 3.15 kg. The first cold flow model results show that the solid circulation rates are sufficient. The appropriate operating conditions are optimized and the summary of final changes is made the on cold model. The proposed design solutions are currently being verified in a cold flow model simulating the actual reactor(hot) system. This paper presents an overview of the research performed on a cold flow model and highlights the current status of the technology.
文摘The hydraulic automatic gauge control system using gap loop for cold mill was designed.The stiffness of HCW cold mill was defined for gap loop,and the dynamic model of gauge control system for gap loop was built with mechanism analysis.The stiffness for gap loop and the cylinder displacement loop were measured.
文摘目的分析比较冷圈套器息肉切除术(CSP)与套圈高频电切术治疗对小直径扁平无蒂结直肠息肉患者的影响。方法选择2024年10月至2025年2月山东大学齐鲁医院德州医院收治的采用CSP治疗的80例小直径扁平无蒂结直肠息肉患者纳入冷切组,另选取同期采用套圈高频电切术治疗且性别、年龄匹配的80例小直径扁平无蒂结直肠息肉患者纳入电切组。比较两组手术相关指标(结肠镜操作时间、息肉完整切除率)、术后恢复时间(肛门排气、下床活动时间)、并发症(延迟出血、感染、即刻穿孔、延迟穿孔)总发生率、治疗总费用。比较两组术后2、8、12 h疼痛情况[视觉模拟评分法(VAS)]。结果与电切组比较,冷切组结肠镜操作时间及肛门排气时间更短(P<0.05),治疗总费用更少(P<0.05),术后2 h VAS评分更低(P<0.05);两组息肉完整切除率、下床活动时间、并发症总发生率及术后8 h、12 h VAS评分比较,差异无统计学意义(P>0.05)。结论CSP和套圈高频电切术治疗小直径扁平无蒂结直肠息肉患者效果相当,并发症发生风险低,其中CSP结肠镜操作时间更短,术后短时间内疼痛度更低,且治疗费用更低。
