目的对正颌外科计算机模拟系统在牵张成骨技术应用中的预测准确性及其临床意义和价值进行评价和分析。方法对临床30例行牵张成骨术的牙颌面畸形患者应用正颌外科计算机辅助模拟系统(computer-assisted simulation system for orthognath...目的对正颌外科计算机模拟系统在牵张成骨技术应用中的预测准确性及其临床意义和价值进行评价和分析。方法对临床30例行牵张成骨术的牙颌面畸形患者应用正颌外科计算机辅助模拟系统(computer-assisted simulation system for orthognathic surgery,CASSOS)进行术前诊断,模拟手术和面像预测,并与术后实际效果进行比较。结果模拟预测与实际结果比较,除单侧牵张成骨比较时Pog-NB差异存在统计学意义外,其余测量参数差异无统计学意义。结论正颌外科计算机模拟预测系统CASSOS能够较为准确的预测下颌单双侧和上颌牵张成骨术后治疗效果,但是对单侧牵张成骨术后下颌颏部的预测仍有差距。展开更多
计算机模拟病例（computer-based case simulation，CCS）考试是测量学生解决临床问题能力，尤其是临床决策思维和处理病人问题能力的重要方法之一。本文介绍了计算机模拟病例考试的概念、国外发展状态、与其他考试形式的比较，阐述了...计算机模拟病例（computer-based case simulation，CCS）考试是测量学生解决临床问题能力，尤其是临床决策思维和处理病人问题能力的重要方法之一。本文介绍了计算机模拟病例考试的概念、国外发展状态、与其他考试形式的比较，阐述了计算机模拟病例的优越性，为大范围地推广应用提供了依据。展开更多
A new type ultraflattened dispersion square-lattice photonic crystal fiber with two different air-hole diameters in cladding region is proposed and the dispersion is investigated using a compact 2-D finite difference ...A new type ultraflattened dispersion square-lattice photonic crystal fiber with two different air-hole diameters in cladding region is proposed and the dispersion is investigated using a compact 2-D finite difference frequency domain method with the anisotropic perfectly matched layers (PML) absorbing boundary conditions. Through numerical simulation and opti- mizing the geometrical parameters, we find that the photonic crystal fibers proposed can realize ultraflattened dispersion of 0±0.06 ps/(km·nm) in wa...展开更多
文摘目的对正颌外科计算机模拟系统在牵张成骨技术应用中的预测准确性及其临床意义和价值进行评价和分析。方法对临床30例行牵张成骨术的牙颌面畸形患者应用正颌外科计算机辅助模拟系统(computer-assisted simulation system for orthognathic surgery,CASSOS)进行术前诊断,模拟手术和面像预测,并与术后实际效果进行比较。结果模拟预测与实际结果比较,除单侧牵张成骨比较时Pog-NB差异存在统计学意义外,其余测量参数差异无统计学意义。结论正颌外科计算机模拟预测系统CASSOS能够较为准确的预测下颌单双侧和上颌牵张成骨术后治疗效果,但是对单侧牵张成骨术后下颌颏部的预测仍有差距。
文摘计算机模拟病例（computer-based case simulation，CCS）考试是测量学生解决临床问题能力，尤其是临床决策思维和处理病人问题能力的重要方法之一。本文介绍了计算机模拟病例考试的概念、国外发展状态、与其他考试形式的比较，阐述了计算机模拟病例的优越性，为大范围地推广应用提供了依据。
基金supported by the National Natural ScienceFoundation of China (Grant Nos. 60637010 and 60671036)the National Basic Research Program of China (Grant No.2007CB310403).
文摘A new type ultraflattened dispersion square-lattice photonic crystal fiber with two different air-hole diameters in cladding region is proposed and the dispersion is investigated using a compact 2-D finite difference frequency domain method with the anisotropic perfectly matched layers (PML) absorbing boundary conditions. Through numerical simulation and opti- mizing the geometrical parameters, we find that the photonic crystal fibers proposed can realize ultraflattened dispersion of 0±0.06 ps/(km·nm) in wa...
