At present grammar teaching is one of the most difficult points because of the limited teaching time and emphasizing on terminology memory and rules of understanding, therefore, students think learning grammar is bori...At present grammar teaching is one of the most difficult points because of the limited teaching time and emphasizing on terminology memory and rules of understanding, therefore, students think learning grammar is boring and ineffective. For the reason, the effectiveness of college English grammar teaching based on flipping classroom is analyzed.展开更多
目的本研究旨在探讨大规模开放在线课程(massive open online course,MOOC)式翻转课堂在妇产科超声教学中的应用效果,以探究全面提升医学教育质量和培养专业妇产科医学人才的途径。方法选取2021年1月—2023年12月在广州医科大学附属番...目的本研究旨在探讨大规模开放在线课程(massive open online course,MOOC)式翻转课堂在妇产科超声教学中的应用效果,以探究全面提升医学教育质量和培养专业妇产科医学人才的途径。方法选取2021年1月—2023年12月在广州医科大学附属番禺中心医院超声诊断科实习的60名妇产科超声实习生作为研究对象,采用随机数字表法将其分为新式组与传统组,每组30名。新式组采用MOOC式翻转课堂教学,传统组接受常规教学。对比两组知识掌握度、技能熟练程度、诊断能力和综合能力。结果教学后,新式组知识掌握度为(88.55±4.23)分,技能熟练程度为(85.36±3.98)分,均优于传统组的(80.23±5.12)分和(78.45±4.21)分,差异均有统计学意义(t=6.339,9.635;P均<0.05)。在超声诊断准确率和超声报告撰写规范性和准确性上,新式组优于传统组,差异均有统计学意义(P均<0.05)。在综合能力方面,新式组的问题解决能力和团队协作能力优于传统组,差异均有统计学意义(P均<0.05)。结论MOOC式翻转课堂在妇产科超声教学中能有效提升实习生的知识掌握度、技能熟练程度、诊断能力和综合能力,是一种有效的教学方法。展开更多
Tabletop integral imaging display with a more realistic and immersive experience has always been a hot spot in three-dimensional imaging technology,widely used in biomedical imaging and visualization to enhance medica...Tabletop integral imaging display with a more realistic and immersive experience has always been a hot spot in three-dimensional imaging technology,widely used in biomedical imaging and visualization to enhance medical diagnosis.However,the traditional structural characteristics of integral imaging display inevitably introduce the flipping effect outside the effective viewing angle.Here,a full-parallax tabletop integral imaging display without the flipping effect based on space-multiplexed voxel screen and compound lens array is demonstrated,and two holographic functional screens with different parameters are optically designed and fabricated.To eliminate the flipping effect in the reconstruction process,the space-multiplexed voxel screen consisting of a projector array and the holographic functional screen is presented to constrain light beams passing through the corresponding lens.To greatly promote imaging quality within the viewing area,the aspherical structure of the compound lens is optimized to balance the aberrations.It cooperates with the holographic functional screen to modulate the light field spatial distribution.Compared with the simulation results,the distortion rate of the imaging display is reduced to less than 9%from more than 30%.In the experiment,the floating high-quality reconstructed three-dimensional image without the flipping effect can be observed with the correct 3D perception at 96°×96°viewing angle,where 44,100 viewpoints are employed.展开更多
文摘At present grammar teaching is one of the most difficult points because of the limited teaching time and emphasizing on terminology memory and rules of understanding, therefore, students think learning grammar is boring and ineffective. For the reason, the effectiveness of college English grammar teaching based on flipping classroom is analyzed.
文摘目的本研究旨在探讨大规模开放在线课程(massive open online course,MOOC)式翻转课堂在妇产科超声教学中的应用效果,以探究全面提升医学教育质量和培养专业妇产科医学人才的途径。方法选取2021年1月—2023年12月在广州医科大学附属番禺中心医院超声诊断科实习的60名妇产科超声实习生作为研究对象,采用随机数字表法将其分为新式组与传统组,每组30名。新式组采用MOOC式翻转课堂教学,传统组接受常规教学。对比两组知识掌握度、技能熟练程度、诊断能力和综合能力。结果教学后,新式组知识掌握度为(88.55±4.23)分,技能熟练程度为(85.36±3.98)分,均优于传统组的(80.23±5.12)分和(78.45±4.21)分,差异均有统计学意义(t=6.339,9.635;P均<0.05)。在超声诊断准确率和超声报告撰写规范性和准确性上,新式组优于传统组,差异均有统计学意义(P均<0.05)。在综合能力方面,新式组的问题解决能力和团队协作能力优于传统组,差异均有统计学意义(P均<0.05)。结论MOOC式翻转课堂在妇产科超声教学中能有效提升实习生的知识掌握度、技能熟练程度、诊断能力和综合能力,是一种有效的教学方法。
基金The Basic Research Fund of Central-Level Nonprofit Scientific Research Institutes(No.TKS20220304)The Key Research and Development Projects of Guangxi Science and Technology Department(No.2021AB05087).
文摘Tabletop integral imaging display with a more realistic and immersive experience has always been a hot spot in three-dimensional imaging technology,widely used in biomedical imaging and visualization to enhance medical diagnosis.However,the traditional structural characteristics of integral imaging display inevitably introduce the flipping effect outside the effective viewing angle.Here,a full-parallax tabletop integral imaging display without the flipping effect based on space-multiplexed voxel screen and compound lens array is demonstrated,and two holographic functional screens with different parameters are optically designed and fabricated.To eliminate the flipping effect in the reconstruction process,the space-multiplexed voxel screen consisting of a projector array and the holographic functional screen is presented to constrain light beams passing through the corresponding lens.To greatly promote imaging quality within the viewing area,the aspherical structure of the compound lens is optimized to balance the aberrations.It cooperates with the holographic functional screen to modulate the light field spatial distribution.Compared with the simulation results,the distortion rate of the imaging display is reduced to less than 9%from more than 30%.In the experiment,the floating high-quality reconstructed three-dimensional image without the flipping effect can be observed with the correct 3D perception at 96°×96°viewing angle,where 44,100 viewpoints are employed.
