This paper introduces a mixed music analysis method using extended specmurt analysis. Conventional specmurt can only analyze a multi-pitch music signal from a single instrument and cannot analyze a mixed music signal ...This paper introduces a mixed music analysis method using extended specmurt analysis. Conventional specmurt can only analyze a multi-pitch music signal from a single instrument and cannot analyze a mixed music signal that has several different types of instruments being played at the same time. To analyze a mixed music signal, extended specmurt is proposed. We regard the observed spectrum extracted from the mixed music as the summation of the observed spectra corresponding to each instrument. The mixed music has as many unknown fundamental frequency distributions as the number of instruments since the observed spectrum of a single instrument can be expressed as a convolution of the common harmonic structure and the fundamental frequency distribution. The relation among the observed spectrum, the common harmonic structure and the fundamental frequency distribution is transformed into a matrix representation in order to obtain the unknown fundamental frequency distributions. The equation is called extended specmurt, and the matrix of unknown components can be obtained by using a pseudo inverse matrix. The experimental result shows the effectiveness of the proposed method.展开更多
This research undertakes a nuanced examination of the intersections and distinctions between these two diverse musical traditions.Employing a meticulous comparative analysis,the study scrutinizes fundamental musical e...This research undertakes a nuanced examination of the intersections and distinctions between these two diverse musical traditions.Employing a meticulous comparative analysis,the study scrutinizes fundamental musical elements such as scales,modes,and compositional styles,illuminating shared threads and distinctive attributes that characterize Chinese and Western music.Against the backdrop of contemporary global dynamics,the research investigates the ongoing integration of these musical cultures.It explores the impact of globalization and technological advancements,revealing instances of cross-cultural collaboration and the emergence of hybrid musical forms.Augmenting theoretical discussions with concrete case studies,the paper offers illuminating examples of how Chinese and Western musical elements interweave,contributing to the evolving landscape of global music.This research not only advances scholarly understanding but also contributes practical insights for musicians,educators,and enthusiasts navigating the evolving dynamics of cross-cultural musical expression.By elucidating the intricate relationship between Chinese and Western music cultures,the paper underscores the richness borne out of their interaction and the cultural synthesis that defines contemporary musical landscapes.展开更多
BACKGROUND Music seems to be beneficial in multiple clinical areas.Colonoscopy is a stressful event for patients,especially with conscious sedation.Music during colonoscopy has been evaluated in multiple randomized co...BACKGROUND Music seems to be beneficial in multiple clinical areas.Colonoscopy is a stressful event for patients,especially with conscious sedation.Music during colonoscopy has been evaluated in multiple randomized controlled trials(RCTs)with varied results.Even meta-analyses on the subject over the years have yielded inconsistent conclusions.Therefore,we conducted an up-to-date meta-analysis regarding music during colonoscopy.AIM To assess the effects of music played during colonoscopy on patients’perspectives and sedation requirements.METHODS Multiple large databases were aggressively searched(November 2018).RCTs comparing music to without music during colonoscopy on adult patients were included.Pooled estimates were calculated for sedative medication doses,total procedure time,and patients’experience,willingness to repeat procedure,and pain scores using odds ratio(OR)and mean difference(MD)with random effects model.RESULTS Eleven studies(n=988)were included.Music during colonoscopy showed a statistically significant reduction in procedure times(MD:-2.3 min;95%CI:-4.13 to-0.47;P=0.01)and patients’pain(MD:-1.26;95%CI:-2.28 to-0.24;P=0.02)while improving patients’experience(MD:-1.11;95%CI:-1.7 to-0.53;P<0.01)as compared to no music.No statistically significant differences were observed between music and no music during colonoscopy for midazolam(MD:-0.4 mg;95%CI:-0.9 to 0.09;P=0.11),meperidine(MD:-3.06 mg;95%CI:-10.79 to 4.67;P=0.44),or patients’willingness to repeat the colonoscopy(OR:3.89;95%CI:0.76 to 19.97;P=0.1).CONCLUSION Music appears to improve overall patient experience while reducing procedure times and patient pain.Therefore,music,being a non-invasive intervention,should be strongly considered during colonoscopy.展开更多
A nonlinear method named detrended fluctuation analysis （DFA） was utilized to investigate the scaling behavior of the human electroencephalogram （EEG） in three emotional music conditions （fear, happiness, sadness...A nonlinear method named detrended fluctuation analysis （DFA） was utilized to investigate the scaling behavior of the human electroencephalogram （EEG） in three emotional music conditions （fear, happiness, sadness） and a rest condition （eyes-closed）. The results showed that the EEG exhibited scaling behavior in two regions with two scaling exponents β1 and β2 which represented the complexity of higher and lower frequency activity besides α band respectively. As the emotional intensity decreased the value of β1 increased and the value of β2 decreased. The change of β1 was weakly correlated with the ＇approach-withdrawal＇ model of emotion and both of fear and sad music made certain differences compared with the eyes-closed rest condition. The study shows that music is a powerful elicitor of emotion and that using nonlinear method can potentially contribute to the investigation of emotion.展开更多
[目的]针对当前国内外对散黄鸡蛋较难无损检测的问题,对散黄鸡蛋的振动特性和无损检测方法进行了研究。[方法]通过对鸡蛋进行生理学解剖,据此进行ANSYS有限元分析;构建基于磁致伸缩振子扫频式振动的鸡蛋散黄检测系统,对采集的鸡蛋振动...[目的]针对当前国内外对散黄鸡蛋较难无损检测的问题,对散黄鸡蛋的振动特性和无损检测方法进行了研究。[方法]通过对鸡蛋进行生理学解剖,据此进行ANSYS有限元分析;构建基于磁致伸缩振子扫频式振动的鸡蛋散黄检测系统,对采集的鸡蛋振动音频信号进行MUSIC(multiple signal classification)功率谱分析,再利用主成分分析法提取特征向量中的有用信息并构建基于对向传播神经网络(CPNN)的鸡蛋散黄检测模型。[结果]鸡蛋的ANSYS固液耦合有限元分析证明新鲜蛋与散黄蛋振动特性差异明显,为基于振动信息的鸡蛋散黄检测提供理论依据;基于磁致伸缩振子扫频式振动的鸡蛋散黄检测系统能有效增强鸡蛋振动信息,基于对向传播神经网络的鸡蛋散黄检测模型对300枚鸡蛋进行检测(训练集200枚,测试集100枚),结果新鲜蛋与散黄蛋的识别率分别达到98%和96%。[结论]新鲜蛋与散黄蛋振动存在差异,采用基于扫频振动式的MUSIC功率谱分析和对向传播神经网络的鸡蛋散黄检测是可行的。展开更多
Musical analysis enables us to study the various elements of a musical work, for example texture, m dynamics, or harmony （including tonality）. Thanks to musical analysis we are able to trace the compos technique, or...Musical analysis enables us to study the various elements of a musical work, for example texture, m dynamics, or harmony （including tonality）. Thanks to musical analysis we are able to trace the compos technique, or assess the artistic value of given work. In addition to traditional, descriptive methods of e it ody, onal music analysis, we can observe in 20th century the development of methods based on science （mathematics, otherwise statistics）. Such methodologies allow us to obtain a strict understanding of the structure of musical pieces Applying mathematical methods for musical analysis seems very reasonable in relation to the output of Frederic Chopin, due to large originality of the elements of musical pieces of this composer. Present paper was written as a result of research related to the applying of numerical method of analysis for exploring the tonal structure of Chopin＇s works. The author＇s research method enables a strict analysis of the chord＇s domination that can be classified under given key （range）--taking into consideration the harmonic functions. By the method of analysis we can get charts that depict whole diatonic vertical music material of the given piece. The main objective of the present study is to describe observations on the high uniqueness in the tonal construction of selected Chopin＇s mazurkas, especially, when compared to the miniatures of other composers of the first half of the 19th century and previously analyzed Chopin＇s pieces： etudes, preludes, and songs.展开更多
阵列信号处理是信号处理领域内的重要内容,近年来发展十分迅速,波达方向DOA(Direction of Arrival)估计作为其主要研究方向,在雷达、通信、声纳、地震学等领域内有着非常广阔的应用前景,对高分辨DOA估计算法研究取得了很多重要成果.主...阵列信号处理是信号处理领域内的重要内容,近年来发展十分迅速,波达方向DOA(Direction of Arrival)估计作为其主要研究方向,在雷达、通信、声纳、地震学等领域内有着非常广阔的应用前景,对高分辨DOA估计算法研究取得了很多重要成果.主要研究经典MUSIC(Multiple signal Classification)多重信号分类算法,并对影响估计性能的各种因素进行仿真分析,为进一步研究MUSIC算法提供参考.展开更多
针对MUSIC算法无法分析非平稳电能质量扰动,提出了一种基于自适应滑窗-多信号分类算法(Adaptive Sliding Win-dow-Multiple Signal Classification,ASW-MUSIC)的时频分析方法。该方法首先根据非平稳电能质量扰动信号特征,采用自适应滑...针对MUSIC算法无法分析非平稳电能质量扰动,提出了一种基于自适应滑窗-多信号分类算法(Adaptive Sliding Win-dow-Multiple Signal Classification,ASW-MUSIC)的时频分析方法。该方法首先根据非平稳电能质量扰动信号特征,采用自适应滑窗对信号数据进行分块,然后利用MUSIC算法对每块中的数据进行处理,检测出频率和幅值信息。并联合所有窗口的分析结果,从而得到整个信号的时频率分布信息。最后对电能质量干扰的非平稳信号进行了仿真实验。实验结果表明,提出的方法适合动态电能质量扰动检测,具有实际应用前景。展开更多
文摘This paper introduces a mixed music analysis method using extended specmurt analysis. Conventional specmurt can only analyze a multi-pitch music signal from a single instrument and cannot analyze a mixed music signal that has several different types of instruments being played at the same time. To analyze a mixed music signal, extended specmurt is proposed. We regard the observed spectrum extracted from the mixed music as the summation of the observed spectra corresponding to each instrument. The mixed music has as many unknown fundamental frequency distributions as the number of instruments since the observed spectrum of a single instrument can be expressed as a convolution of the common harmonic structure and the fundamental frequency distribution. The relation among the observed spectrum, the common harmonic structure and the fundamental frequency distribution is transformed into a matrix representation in order to obtain the unknown fundamental frequency distributions. The equation is called extended specmurt, and the matrix of unknown components can be obtained by using a pseudo inverse matrix. The experimental result shows the effectiveness of the proposed method.
文摘This research undertakes a nuanced examination of the intersections and distinctions between these two diverse musical traditions.Employing a meticulous comparative analysis,the study scrutinizes fundamental musical elements such as scales,modes,and compositional styles,illuminating shared threads and distinctive attributes that characterize Chinese and Western music.Against the backdrop of contemporary global dynamics,the research investigates the ongoing integration of these musical cultures.It explores the impact of globalization and technological advancements,revealing instances of cross-cultural collaboration and the emergence of hybrid musical forms.Augmenting theoretical discussions with concrete case studies,the paper offers illuminating examples of how Chinese and Western musical elements interweave,contributing to the evolving landscape of global music.This research not only advances scholarly understanding but also contributes practical insights for musicians,educators,and enthusiasts navigating the evolving dynamics of cross-cultural musical expression.By elucidating the intricate relationship between Chinese and Western music cultures,the paper underscores the richness borne out of their interaction and the cultural synthesis that defines contemporary musical landscapes.
文摘BACKGROUND Music seems to be beneficial in multiple clinical areas.Colonoscopy is a stressful event for patients,especially with conscious sedation.Music during colonoscopy has been evaluated in multiple randomized controlled trials(RCTs)with varied results.Even meta-analyses on the subject over the years have yielded inconsistent conclusions.Therefore,we conducted an up-to-date meta-analysis regarding music during colonoscopy.AIM To assess the effects of music played during colonoscopy on patients’perspectives and sedation requirements.METHODS Multiple large databases were aggressively searched(November 2018).RCTs comparing music to without music during colonoscopy on adult patients were included.Pooled estimates were calculated for sedative medication doses,total procedure time,and patients’experience,willingness to repeat procedure,and pain scores using odds ratio(OR)and mean difference(MD)with random effects model.RESULTS Eleven studies(n=988)were included.Music during colonoscopy showed a statistically significant reduction in procedure times(MD:-2.3 min;95%CI:-4.13 to-0.47;P=0.01)and patients’pain(MD:-1.26;95%CI:-2.28 to-0.24;P=0.02)while improving patients’experience(MD:-1.11;95%CI:-1.7 to-0.53;P<0.01)as compared to no music.No statistically significant differences were observed between music and no music during colonoscopy for midazolam(MD:-0.4 mg;95%CI:-0.9 to 0.09;P=0.11),meperidine(MD:-3.06 mg;95%CI:-10.79 to 4.67;P=0.44),or patients’willingness to repeat the colonoscopy(OR:3.89;95%CI:0.76 to 19.97;P=0.1).CONCLUSION Music appears to improve overall patient experience while reducing procedure times and patient pain.Therefore,music,being a non-invasive intervention,should be strongly considered during colonoscopy.
基金This work was supported by the National Nature Science Foundation of China under Grant No. 60571019 and No. 30525030.
文摘A nonlinear method named detrended fluctuation analysis （DFA） was utilized to investigate the scaling behavior of the human electroencephalogram （EEG） in three emotional music conditions （fear, happiness, sadness） and a rest condition （eyes-closed）. The results showed that the EEG exhibited scaling behavior in two regions with two scaling exponents β1 and β2 which represented the complexity of higher and lower frequency activity besides α band respectively. As the emotional intensity decreased the value of β1 increased and the value of β2 decreased. The change of β1 was weakly correlated with the ＇approach-withdrawal＇ model of emotion and both of fear and sad music made certain differences compared with the eyes-closed rest condition. The study shows that music is a powerful elicitor of emotion and that using nonlinear method can potentially contribute to the investigation of emotion.
文摘[目的]针对当前国内外对散黄鸡蛋较难无损检测的问题,对散黄鸡蛋的振动特性和无损检测方法进行了研究。[方法]通过对鸡蛋进行生理学解剖,据此进行ANSYS有限元分析;构建基于磁致伸缩振子扫频式振动的鸡蛋散黄检测系统,对采集的鸡蛋振动音频信号进行MUSIC(multiple signal classification)功率谱分析,再利用主成分分析法提取特征向量中的有用信息并构建基于对向传播神经网络(CPNN)的鸡蛋散黄检测模型。[结果]鸡蛋的ANSYS固液耦合有限元分析证明新鲜蛋与散黄蛋振动特性差异明显,为基于振动信息的鸡蛋散黄检测提供理论依据;基于磁致伸缩振子扫频式振动的鸡蛋散黄检测系统能有效增强鸡蛋振动信息,基于对向传播神经网络的鸡蛋散黄检测模型对300枚鸡蛋进行检测(训练集200枚,测试集100枚),结果新鲜蛋与散黄蛋的识别率分别达到98%和96%。[结论]新鲜蛋与散黄蛋振动存在差异,采用基于扫频振动式的MUSIC功率谱分析和对向传播神经网络的鸡蛋散黄检测是可行的。
文摘Musical analysis enables us to study the various elements of a musical work, for example texture, m dynamics, or harmony （including tonality）. Thanks to musical analysis we are able to trace the compos technique, or assess the artistic value of given work. In addition to traditional, descriptive methods of e it ody, onal music analysis, we can observe in 20th century the development of methods based on science （mathematics, otherwise statistics）. Such methodologies allow us to obtain a strict understanding of the structure of musical pieces Applying mathematical methods for musical analysis seems very reasonable in relation to the output of Frederic Chopin, due to large originality of the elements of musical pieces of this composer. Present paper was written as a result of research related to the applying of numerical method of analysis for exploring the tonal structure of Chopin＇s works. The author＇s research method enables a strict analysis of the chord＇s domination that can be classified under given key （range）--taking into consideration the harmonic functions. By the method of analysis we can get charts that depict whole diatonic vertical music material of the given piece. The main objective of the present study is to describe observations on the high uniqueness in the tonal construction of selected Chopin＇s mazurkas, especially, when compared to the miniatures of other composers of the first half of the 19th century and previously analyzed Chopin＇s pieces： etudes, preludes, and songs.
文摘阵列信号处理是信号处理领域内的重要内容,近年来发展十分迅速,波达方向DOA(Direction of Arrival)估计作为其主要研究方向,在雷达、通信、声纳、地震学等领域内有着非常广阔的应用前景,对高分辨DOA估计算法研究取得了很多重要成果.主要研究经典MUSIC(Multiple signal Classification)多重信号分类算法,并对影响估计性能的各种因素进行仿真分析,为进一步研究MUSIC算法提供参考.
文摘针对MUSIC算法无法分析非平稳电能质量扰动,提出了一种基于自适应滑窗-多信号分类算法(Adaptive Sliding Win-dow-Multiple Signal Classification,ASW-MUSIC)的时频分析方法。该方法首先根据非平稳电能质量扰动信号特征,采用自适应滑窗对信号数据进行分块,然后利用MUSIC算法对每块中的数据进行处理,检测出频率和幅值信息。并联合所有窗口的分析结果,从而得到整个信号的时频率分布信息。最后对电能质量干扰的非平稳信号进行了仿真实验。实验结果表明,提出的方法适合动态电能质量扰动检测,具有实际应用前景。
