目的探讨以问题为基础的教学法(problem based learning,PBL)联合以案例为基础的教学法(case based learning,CBL)在儿童肺功能专科进修培训中的应用效果。方法以2020年1月—2022年12月25名在四川大学华西第二医院肺功能专科的进修人员...目的探讨以问题为基础的教学法(problem based learning,PBL)联合以案例为基础的教学法(case based learning,CBL)在儿童肺功能专科进修培训中的应用效果。方法以2020年1月—2022年12月25名在四川大学华西第二医院肺功能专科的进修人员为调查对象,应用PBL联合CBL教学法,比较进修前后的理论知识与实际操作水平、胜任力水平,并调查进修人员对培训的满意度。结果经过一段时间理论和实践的培训,进修人员理论知识和实践技能操作水平以及胜任力水平较进修前均得到较大提升,培训前理论知识水平、实际操作和胜任力水平评分分别为(22.48±9.52)分、(15.40±5.97)分和(21.04±6.47)分,培训后理论知识水平、实际操作和胜任力水平评分分别为(75.00±24.00)分、(58.84±19.44)分和(65.32±17.39)分,培训前后差异有统计学意义(P<0.05)。肺功能检测进修人员对肺功能检测室整体工作环境比较满意。结论在PBL联合CBL教学法模式下,进修人员的理论知识与实际操作水平均有不同程度的提高,胜任力水平有较大提升,PBL联合CBL教学法可有效提高肺功能专科进修培训效果,肺功能检测应不断规范培训流程,完善肺功能检测进修体系,提升肺功能检测进修人员综合素质与学习满意度。展开更多
For the encoding bit-rate problem in H.264 wireless video communication, this paper analyzes the bit-rate computation model and the Mean Square Error distortion model, establishes the relation between the quantization...For the encoding bit-rate problem in H.264 wireless video communication, this paper analyzes the bit-rate computation model and the Mean Square Error distortion model, establishes the relation between the quantization parameter of the encoding bit-rate and the intra frame refresh rate of the macro block, and put forward a new ideal about the coding rate on the basis of general binomial computation model theory. Furthermore, this method not only can adaptively adjust the bit allocation and quantization pa rameter and prevents buffer from overflowing downward or upward under given network bandwidth, but also can apply the rate-distortion to optimize the solution method, control the encoding bits accurately and optimizes the allocation between the intra and inter frame encoding macro block.展开更多
文摘目的探讨以问题为基础的教学法(problem based learning,PBL)联合以案例为基础的教学法(case based learning,CBL)在儿童肺功能专科进修培训中的应用效果。方法以2020年1月—2022年12月25名在四川大学华西第二医院肺功能专科的进修人员为调查对象,应用PBL联合CBL教学法,比较进修前后的理论知识与实际操作水平、胜任力水平,并调查进修人员对培训的满意度。结果经过一段时间理论和实践的培训,进修人员理论知识和实践技能操作水平以及胜任力水平较进修前均得到较大提升,培训前理论知识水平、实际操作和胜任力水平评分分别为(22.48±9.52)分、(15.40±5.97)分和(21.04±6.47)分,培训后理论知识水平、实际操作和胜任力水平评分分别为(75.00±24.00)分、(58.84±19.44)分和(65.32±17.39)分,培训前后差异有统计学意义(P<0.05)。肺功能检测进修人员对肺功能检测室整体工作环境比较满意。结论在PBL联合CBL教学法模式下,进修人员的理论知识与实际操作水平均有不同程度的提高,胜任力水平有较大提升,PBL联合CBL教学法可有效提高肺功能专科进修培训效果,肺功能检测应不断规范培训流程,完善肺功能检测进修体系,提升肺功能检测进修人员综合素质与学习满意度。
基金Supported by the National Natural Science Foundation of China(60673191)the National Education and Science Tenth Five-Year Planning Major Projects Funds(AYA010034)
文摘For the encoding bit-rate problem in H.264 wireless video communication, this paper analyzes the bit-rate computation model and the Mean Square Error distortion model, establishes the relation between the quantization parameter of the encoding bit-rate and the intra frame refresh rate of the macro block, and put forward a new ideal about the coding rate on the basis of general binomial computation model theory. Furthermore, this method not only can adaptively adjust the bit allocation and quantization pa rameter and prevents buffer from overflowing downward or upward under given network bandwidth, but also can apply the rate-distortion to optimize the solution method, control the encoding bits accurately and optimizes the allocation between the intra and inter frame encoding macro block.
