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基于卷积神经网络的视频编码优化算法 认领 引用 被引量：2
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作者 陆宇 陈谦 殷海兵 《吉林大学学报（工学版）》 EI CAS CSCD 北大核心 2024年第11期3296-3301,共6页
为进一步提高高效视频编码(HEVC)的压缩效率,使其更好地适用于高清视频的压缩,利用深度学习对视频特征强大的挖掘能力,提出了一种多输入的多尺度残差卷积神经网络和网络迭代训练方法,显著提高了HEVC环路滤波的性能;提出了一种新颖的分... 为进一步提高高效视频编码(HEVC)的压缩效率,使其更好地适用于高清视频的压缩,利用深度学习对视频特征强大的挖掘能力,提出了一种多输入的多尺度残差卷积神经网络和网络迭代训练方法,显著提高了HEVC环路滤波的性能;提出了一种新颖的分像素插值滤波方法,进一步提高编码的压缩效率。实验结果表明,本文算法在RA编码模式下平均可以减少7.47%的BD-rate。与现有的两种编码优化算法相比,本文提出的优化算法有效地提升了压缩效率,同时提高了视频质量。 展开更多
关键词 卷积神经网络 环路滤波 高效视频编码 分像素插值滤波
Distance function selection in several clustering algorithms 认领 引用
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作者 LUYu 《Journal of Chongqing University》 2004年第1期47-50,共4页
Most clustering algorithms need to describe the similarity of objects by a predefined distance function. Three distance functions which are widely used in two traditional clustering algorithms k-means and hierarchical... Most clustering algorithms need to describe the similarity of objects by a predefined distance function. Three distance functions which are widely used in two traditional clustering algorithms k-means and hierarchical clustering were investigated. Both theoretical analysis and detailed experimental results were given. It is shown that a distance function greatly affects clustering results and can be used to detect the outlier of a cluster by the comparison of such different results and give the shape information of clusters. In practice situation, it is suggested to use different distance function separately, compare the clustering results and pick out the 搒wing points? And such points may leak out more information for data analysts. 展开更多
关键词 distance function clustering algorithms k-means dendrogram data mining
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Evaluation of Application Value of Detail Nursing in Neurosurgery Nursing 认领 引用
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作者 LUYu YANGXiaolan 《外文科技期刊数据库（文摘版）医药卫生》 2022年第5期130-133,共4页
Objective: After neurosurgical patients receive surgery, the hospital should provide necessary auxiliary nursing. This experiment briefly analyzes the therapeutic effect of detailed nursing in neurosurgery. Methods: I... Objective: After neurosurgical patients receive surgery, the hospital should provide necessary auxiliary nursing. This experiment briefly analyzes the therapeutic effect of detailed nursing in neurosurgery. Methods: In this experiment, patients admitted to the hospital in a certain period of time were selected, and the best time point was from June 2020 to July 2021. The condition of neurosurgical patients could be more clearly understood, and the experiment was more effective and rigorous. During this period, the neurosurgical patients admitted to the hospital were investigated. After a week of investigation, the physical condition of the patients was recorded in detail, and 68 patients were selected. Patients were divided into two groups on average, and a comparative study was conducted. In the comparative study, the actual nursing effects of the two nursing methods were obtained, which laid the foundation for later clinical treatment. The patients were divided into experimental group and control group, and the recovery effects of the two groups during nursing were compared. Results: Each patient's physical fitness is different, and the degree of acceptance of nursing methods is different, so the final treatment effect will be different. In the difference, we can see that there is a great difference between the clinical effects of the two nursing methods, and the patients in the experimental group are discharged from the hospital faster than those in the control group. The satisfaction of the patients in the experimental group was 91.17%, and that of the patients in the control group was 82.35%. Conclusion: Compared with conventional nursing, detailed nursing is different in all aspects. Detailed nursing is patient-centered and observes the changes of patients' physical condition in all directions, which is an advantage that conventional nursing does not have. The use of detailed nursing conforms to the needs of the times, can better meet the needs of patients, improve the quality of nursing, reduce the incidence of doctor-patient contradiction, and can be popularized and applied in clinical treatment of neurosurgery. 展开更多
关键词 neurosurgery nursing details infection degree of satisfaction
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