Beyond-5G(B5G)aims to meet the growing demands of mobile traffic and expand the communication space.Considering that intelligent applications to B5G wireless communications will involve security issues regarding user ...Beyond-5G(B5G)aims to meet the growing demands of mobile traffic and expand the communication space.Considering that intelligent applications to B5G wireless communications will involve security issues regarding user data and operational data,this paper analyzes the maximum capacity of the multi-watermarking method for multimedia signal hiding as a means of alleviating the information security problem of B5G.The multiwatermarking process employs spread transform dither modulation.During the watermarking procedure,Gram-Schmidt orthogonalization is used to obtain the multiple spreading vectors.Consequently,multiple watermarks can be simultaneously embedded into the same position of a multimedia signal.Moreover,the multiple watermarks can be extracted without affecting one another during the extraction process.We analyze the effect of the size of the spreading vector on the unit maximum capacity,and consequently derive the theoretical relationship between the size of the spreading vector and the unit maximum capacity.A number of experiments are conducted to determine the optimal parameter values for maximum robustness on the premise of high capacity and good imperceptibility.展开更多
临床血液学检验知识较抽象、难懂,医学检验专业学生普遍存在临床思维缺乏,在临床血液学检验时难以合理运用理论知识做出准确的诊断报告。而《临床血液学检验技术》实验课是将理论知识应用于实践的桥梁。以多媒体教学系统为平台,通过以...临床血液学检验知识较抽象、难懂,医学检验专业学生普遍存在临床思维缺乏,在临床血液学检验时难以合理运用理论知识做出准确的诊断报告。而《临床血液学检验技术》实验课是将理论知识应用于实践的桥梁。以多媒体教学系统为平台,通过以问题为基础的教学法(problem based learning,PBL)和案例教学法(case based learning,CBL)的新型实验课教学模式旨在培养学生的实验操作能力、临床思维、独立思考及主动解疑的能力,在学习理论知识的同时培养学生的动手能力和实践能力,为今后学生走上临床检验诊断工作打下坚实的基础。文章从《临床血液学检验技术》实验课教学现状及问题,PBL、CBL及联合教学法的优点,PBL及CBL联合多媒体教学具体实施方法、教学成效及评价反馈方面来探讨如何提高《临床血液学检验技术》实验课教学效果,为临床检验专业实验课教学提供了新的方向。展开更多
目的探究在开展肾病内科实习教学的过程中按照医学图像存储与传输系统(picture archiving and communication system,PACS)联合网络多媒体教学法进行教学的价值。方法选取2020年2月—2022年8月苏州大学附属第二医院肾病内科60名实习医...目的探究在开展肾病内科实习教学的过程中按照医学图像存储与传输系统(picture archiving and communication system,PACS)联合网络多媒体教学法进行教学的价值。方法选取2020年2月—2022年8月苏州大学附属第二医院肾病内科60名实习医生为研究对象,随机分为对照组(30名,按照常规方式进行教学)和观察组(30名,按照PACS联合网络多媒体教学法进行教学)。针对2组教学效果进行评估。结果对比2组实习医生考核成绩,在教学前2组理论知识水平、实践操作能力、病例书写、体格检查考核差异无统计学意义(P>0.05)。教学后,观察组理论知识水平、实践操作能力、病例书写、体格检查考核考核成绩[(93.53±2.05)分;(93.63±2.11)分;(94.45±2.05)分;(94.36±2.32)分]高于对照组[(88.45±2.15)分;(88.64±1.78)分;(89.45±1.68)分;(86.14±1.48)分],差异有统计学意义(P<0.05)。对比2组实习医生对教学方式评价,在提升临床思维、提升学习兴趣、提升自学能力、降低理论知识理解难度方面评分,观察组均高于对照组,(P<0.05)。对比2组教学满意度,观察组高于对照组,(P<0.05)。结论在进行肾病内科实习教学的过程中开展PACS联合网络多媒体教学法,可以有效提升该方面教学质量,有助于实习医生对各方面专业知识进行掌握和运用,并增加教学满意度。展开更多
基金funded by The National Natural Science Foundation of China under Grant(No.62273108,62306081)The Youth Project of Guangdong Artificial Intelligence and Digital Economy Laboratory(Guangzhou)(PZL2022KF0006)+3 种基金The National Key Research and Development Program of China(2022YFB3604502)Special Fund Project of GuangzhouScience and Technology Innovation Development(202201011307)Guangdong Province Industrial Internet Identity Analysis and Construction Guidance Fund Secondary Node Project(1746312)Special Projects in Key Fields of General Colleges and Universities in Guangdong Province(2021ZDZX1016).
文摘Beyond-5G(B5G)aims to meet the growing demands of mobile traffic and expand the communication space.Considering that intelligent applications to B5G wireless communications will involve security issues regarding user data and operational data,this paper analyzes the maximum capacity of the multi-watermarking method for multimedia signal hiding as a means of alleviating the information security problem of B5G.The multiwatermarking process employs spread transform dither modulation.During the watermarking procedure,Gram-Schmidt orthogonalization is used to obtain the multiple spreading vectors.Consequently,multiple watermarks can be simultaneously embedded into the same position of a multimedia signal.Moreover,the multiple watermarks can be extracted without affecting one another during the extraction process.We analyze the effect of the size of the spreading vector on the unit maximum capacity,and consequently derive the theoretical relationship between the size of the spreading vector and the unit maximum capacity.A number of experiments are conducted to determine the optimal parameter values for maximum robustness on the premise of high capacity and good imperceptibility.
文摘临床血液学检验知识较抽象、难懂,医学检验专业学生普遍存在临床思维缺乏,在临床血液学检验时难以合理运用理论知识做出准确的诊断报告。而《临床血液学检验技术》实验课是将理论知识应用于实践的桥梁。以多媒体教学系统为平台,通过以问题为基础的教学法(problem based learning,PBL)和案例教学法(case based learning,CBL)的新型实验课教学模式旨在培养学生的实验操作能力、临床思维、独立思考及主动解疑的能力,在学习理论知识的同时培养学生的动手能力和实践能力,为今后学生走上临床检验诊断工作打下坚实的基础。文章从《临床血液学检验技术》实验课教学现状及问题,PBL、CBL及联合教学法的优点,PBL及CBL联合多媒体教学具体实施方法、教学成效及评价反馈方面来探讨如何提高《临床血液学检验技术》实验课教学效果,为临床检验专业实验课教学提供了新的方向。
文摘目的探究在开展肾病内科实习教学的过程中按照医学图像存储与传输系统(picture archiving and communication system,PACS)联合网络多媒体教学法进行教学的价值。方法选取2020年2月—2022年8月苏州大学附属第二医院肾病内科60名实习医生为研究对象,随机分为对照组(30名,按照常规方式进行教学)和观察组(30名,按照PACS联合网络多媒体教学法进行教学)。针对2组教学效果进行评估。结果对比2组实习医生考核成绩,在教学前2组理论知识水平、实践操作能力、病例书写、体格检查考核差异无统计学意义(P>0.05)。教学后,观察组理论知识水平、实践操作能力、病例书写、体格检查考核考核成绩[(93.53±2.05)分;(93.63±2.11)分;(94.45±2.05)分;(94.36±2.32)分]高于对照组[(88.45±2.15)分;(88.64±1.78)分;(89.45±1.68)分;(86.14±1.48)分],差异有统计学意义(P<0.05)。对比2组实习医生对教学方式评价,在提升临床思维、提升学习兴趣、提升自学能力、降低理论知识理解难度方面评分,观察组均高于对照组,(P<0.05)。对比2组教学满意度,观察组高于对照组,(P<0.05)。结论在进行肾病内科实习教学的过程中开展PACS联合网络多媒体教学法,可以有效提升该方面教学质量,有助于实习医生对各方面专业知识进行掌握和运用,并增加教学满意度。
