目的:应用三维有限元技术评估发育性髋关节脱位(developmental dysplasia of the hip,DDH)患儿在Dega骨盆截骨术后不同中心边缘角(center-edge angle,CEA)状态下髋臼的应力分布,为术前的手术规划提供有参考价值的生物力学结果。方法:使...目的:应用三维有限元技术评估发育性髋关节脱位(developmental dysplasia of the hip,DDH)患儿在Dega骨盆截骨术后不同中心边缘角(center-edge angle,CEA)状态下髋臼的应力分布,为术前的手术规划提供有参考价值的生物力学结果。方法:使用已建立的DDH患者髋关节三维有限元模型,以术后CEA27°为中间值,每3°为一个变量,在Mimics誖10.0软件的模拟手术模块分别构建7组髋臼截骨术后的模型。在单腿站立和双腿站立状态下测量不同CEA状态下髋臼的应力分布。结果:单腿站立情况下,CEA为24°、27°、30°和33°的术后模型患侧髋臼的峰值应力接近正常侧。双腿站立情况下,CEA为24°时双侧髋臼的峰值应力最为接近。结论:对于该患者而言,在7组术后CEA中,24°时患侧髋臼的峰值应力与健侧最为接近,可以认为是最佳的术后CEA。有限元技术能够为Dega手术的术前规划提供个性化的指导方案。展开更多
On HL-2A, the ion temperature profile can be roughly estimated by analyzing the energy spectrum of the neutral particles that escape from core plasma through 11 different spatial channels. However, this profile deviat...On HL-2A, the ion temperature profile can be roughly estimated by analyzing the energy spectrum of the neutral particles that escape from core plasma through 11 different spatial channels. However, this profile deviates from the real radial distribution because of the averaging and attenuation effects. The DEGAS code is used to estimate these effects and reconstruct a more reasonable ion temperature profile by simulating these neutral spectra and making them conform to the measurements. In this paper, critical parameters that affect the escaped neutral spectra are enumerated, and an example of a reconstruction of the ion temperature profile is presented based on experimental data.展开更多
GaN powder of nanometer scale was prepared by metal organic chemical vapor deposition using diethylgallium azide as precursor. The resulting powder was characterized by XRD and TEM. It has been found that the particle...GaN powder of nanometer scale was prepared by metal organic chemical vapor deposition using diethylgallium azide as precursor. The resulting powder was characterized by XRD and TEM. It has been found that the particle size of the powder obtained is affected by the deposition temperature, and the fine crystals formed in temperature range 500 similar to 650 degrees C were hexagonal.展开更多
介绍了LS-De GAS Plus成套技术降低硫磺装置烟气SO2排放技术内容。采用该技术的硫磺装置运行结果表明:硫磺装置烟气SO_2排放质量浓度稳定达到100 mg/m^3以下,优化操作后可达到20～50 mg/m^3,满足GB 31570—2015《石油炼制工业污染物排...介绍了LS-De GAS Plus成套技术降低硫磺装置烟气SO2排放技术内容。采用该技术的硫磺装置运行结果表明:硫磺装置烟气SO_2排放质量浓度稳定达到100 mg/m^3以下,优化操作后可达到20～50 mg/m^3,满足GB 31570—2015《石油炼制工业污染物排放标准》规定的重点地区硫磺装置烟气二氧化硫排放限制100 mg/m^3的要求。LS-De GAS Plus技术具有硫回收率高、投资低、运行能耗低、清洁环保、无二次污染等特点。展开更多
文摘目的:应用三维有限元技术评估发育性髋关节脱位(developmental dysplasia of the hip,DDH)患儿在Dega骨盆截骨术后不同中心边缘角(center-edge angle,CEA)状态下髋臼的应力分布,为术前的手术规划提供有参考价值的生物力学结果。方法:使用已建立的DDH患者髋关节三维有限元模型,以术后CEA27°为中间值,每3°为一个变量,在Mimics誖10.0软件的模拟手术模块分别构建7组髋臼截骨术后的模型。在单腿站立和双腿站立状态下测量不同CEA状态下髋臼的应力分布。结果:单腿站立情况下,CEA为24°、27°、30°和33°的术后模型患侧髋臼的峰值应力接近正常侧。双腿站立情况下,CEA为24°时双侧髋臼的峰值应力最为接近。结论:对于该患者而言,在7组术后CEA中,24°时患侧髋臼的峰值应力与健侧最为接近,可以认为是最佳的术后CEA。有限元技术能够为Dega手术的术前规划提供个性化的指导方案。
文摘On HL-2A, the ion temperature profile can be roughly estimated by analyzing the energy spectrum of the neutral particles that escape from core plasma through 11 different spatial channels. However, this profile deviates from the real radial distribution because of the averaging and attenuation effects. The DEGAS code is used to estimate these effects and reconstruct a more reasonable ion temperature profile by simulating these neutral spectra and making them conform to the measurements. In this paper, critical parameters that affect the escaped neutral spectra are enumerated, and an example of a reconstruction of the ion temperature profile is presented based on experimental data.
文摘GaN powder of nanometer scale was prepared by metal organic chemical vapor deposition using diethylgallium azide as precursor. The resulting powder was characterized by XRD and TEM. It has been found that the particle size of the powder obtained is affected by the deposition temperature, and the fine crystals formed in temperature range 500 similar to 650 degrees C were hexagonal.
文摘介绍了LS-De GAS Plus成套技术降低硫磺装置烟气SO2排放技术内容。采用该技术的硫磺装置运行结果表明:硫磺装置烟气SO_2排放质量浓度稳定达到100 mg/m^3以下,优化操作后可达到20～50 mg/m^3,满足GB 31570—2015《石油炼制工业污染物排放标准》规定的重点地区硫磺装置烟气二氧化硫排放限制100 mg/m^3的要求。LS-De GAS Plus技术具有硫回收率高、投资低、运行能耗低、清洁环保、无二次污染等特点。
