Based on the perspective of big data,the growth characteristics of marine science and technology talents were analyzed,and the growth of marine science and technology talents was divided into five periods:study period...Based on the perspective of big data,the growth characteristics of marine science and technology talents were analyzed,and the growth of marine science and technology talents was divided into five periods:study period,adaptation period,growth period,promotion period and stability period.Moreover,some suggestions for the training of marine science and technology talents were proposed from the aspects of students,families,schools and society.展开更多
In this paper,we study the large-time behavior of periodic solutions for parabolic conservation laws.There is no smallness assumption on the initial data.We firstly get the local existence of the solution by the itera...In this paper,we study the large-time behavior of periodic solutions for parabolic conservation laws.There is no smallness assumption on the initial data.We firstly get the local existence of the solution by the iterative scheme,then we get the exponential decay estimates for the solution by energy method and maximum principle,and obtain the global solution in the same time.展开更多
为准确求解双曲守恒律,得到高分辨率数值结果,将数据驱动与三阶CCWENO(Compact Central Weighted Essentially Non-Oscillatory)格式相结合,提出了一种基于数据驱动的CCWENO-ANN高分辨率格式求解双曲守恒律。通过构建人工神经网络的归...为准确求解双曲守恒律,得到高分辨率数值结果,将数据驱动与三阶CCWENO(Compact Central Weighted Essentially Non-Oscillatory)格式相结合,提出了一种基于数据驱动的CCWENO-ANN高分辨率格式求解双曲守恒律。通过构建人工神经网络的归一化校准层和稀疏化层,引入适当的先验知识,加快收敛速度;同时,损失函数动态地调整神经网络输出与理想权重之间的偏差,并在合适的数据集上采用监督学习策略进行离线训练,以提高神经网络性能。通过一维无粘Burgers方程、一维Euler方程、二维无粘Burgers方程以及二维Euler方程验证算法性能,结果表明本文提出的CCWENO-ANN继承了传统CCWENO格式的收敛性,能够准确捕捉激波和接触间断,具有鲁棒性强、低耗散和高分辨率的优点。展开更多
目的采用R语言数据挖掘技术分析针灸治疗孤独症谱系障碍(ASD)的取穴规律。方法检索中国期刊全文数据库(CNKI)、万方数据知识服务平台(Wanfang Data)、维普资讯中文期刊服务平台(VIP)、中国生物医学文献数据库(CBM)及PubMed、Web of Scie...目的采用R语言数据挖掘技术分析针灸治疗孤独症谱系障碍(ASD)的取穴规律。方法检索中国期刊全文数据库(CNKI)、万方数据知识服务平台(Wanfang Data)、维普资讯中文期刊服务平台(VIP)、中国生物医学文献数据库(CBM)及PubMed、Web of Science建库至2025年3月发表的针灸ASD临床研究文献,利用Excel2019建立数据库,采用R4.4.3统计腧穴使用频次、归经、部位、特定穴,并进行关联规则分析和聚类分析。结果共纳入199篇文献,包括199首针灸处方,涉及腧穴163个,总频次为1729,高频腧穴前20位是百会、神庭、四神聪、四神针、智三针、舌三针、脑户、本神、颞三针、定神针、脑三针、语言3区、语言2区、语言1区、足智针、内关、神门、手智针、脑空、印堂,靳三针为最常用穴区,其次为头针穴区,高频经脉为督脉、足少阳胆经,腧穴多分布于头面部、上肢部和下肢部,特定穴常用原穴。腧穴强关联规则共11条,其中“本神→神庭”支持度最高;高频腧穴聚类分析可分为5类。结论针灸治疗ASD采用“调神益智”经典方案,以头部腧穴为核心,遵循局部取穴原则,常用靳三针、头部针刺配合督脉腧穴;特定穴采用原穴-输穴配伍模式,体现“调神”与“益智”协同作用。展开更多
基金Supported by Foundation for Humanities and Social Sciences Research Planning of Ministry of Education of Shanghai City(19YJA630058)
文摘Based on the perspective of big data,the growth characteristics of marine science and technology talents were analyzed,and the growth of marine science and technology talents was divided into five periods:study period,adaptation period,growth period,promotion period and stability period.Moreover,some suggestions for the training of marine science and technology talents were proposed from the aspects of students,families,schools and society.
基金Foundation item： Supported by the National Science Foundation of China（1107116）
文摘In this paper,we study the large-time behavior of periodic solutions for parabolic conservation laws.There is no smallness assumption on the initial data.We firstly get the local existence of the solution by the iterative scheme,then we get the exponential decay estimates for the solution by energy method and maximum principle,and obtain the global solution in the same time.
文摘为准确求解双曲守恒律,得到高分辨率数值结果,将数据驱动与三阶CCWENO(Compact Central Weighted Essentially Non-Oscillatory)格式相结合,提出了一种基于数据驱动的CCWENO-ANN高分辨率格式求解双曲守恒律。通过构建人工神经网络的归一化校准层和稀疏化层,引入适当的先验知识,加快收敛速度;同时,损失函数动态地调整神经网络输出与理想权重之间的偏差,并在合适的数据集上采用监督学习策略进行离线训练,以提高神经网络性能。通过一维无粘Burgers方程、一维Euler方程、二维无粘Burgers方程以及二维Euler方程验证算法性能,结果表明本文提出的CCWENO-ANN继承了传统CCWENO格式的收敛性,能够准确捕捉激波和接触间断,具有鲁棒性强、低耗散和高分辨率的优点。
文摘目的采用R语言数据挖掘技术分析针灸治疗孤独症谱系障碍(ASD)的取穴规律。方法检索中国期刊全文数据库(CNKI)、万方数据知识服务平台(Wanfang Data)、维普资讯中文期刊服务平台(VIP)、中国生物医学文献数据库(CBM)及PubMed、Web of Science建库至2025年3月发表的针灸ASD临床研究文献,利用Excel2019建立数据库,采用R4.4.3统计腧穴使用频次、归经、部位、特定穴,并进行关联规则分析和聚类分析。结果共纳入199篇文献,包括199首针灸处方,涉及腧穴163个,总频次为1729,高频腧穴前20位是百会、神庭、四神聪、四神针、智三针、舌三针、脑户、本神、颞三针、定神针、脑三针、语言3区、语言2区、语言1区、足智针、内关、神门、手智针、脑空、印堂,靳三针为最常用穴区,其次为头针穴区,高频经脉为督脉、足少阳胆经,腧穴多分布于头面部、上肢部和下肢部,特定穴常用原穴。腧穴强关联规则共11条,其中“本神→神庭”支持度最高;高频腧穴聚类分析可分为5类。结论针灸治疗ASD采用“调神益智”经典方案,以头部腧穴为核心,遵循局部取穴原则,常用靳三针、头部针刺配合督脉腧穴;特定穴采用原穴-输穴配伍模式,体现“调神”与“益智”协同作用。
