针对在现场可编程门阵列(Field Programmable Gate Array,FPGA)上实现基于极化敏感阵列的多重信号分类(Multiple Signal Classification,MUSIC)算法进行二维波达方向(Direction of Arrival,DOA)和二维极化参数联合估计时,硬件资源占用...针对在现场可编程门阵列(Field Programmable Gate Array,FPGA)上实现基于极化敏感阵列的多重信号分类(Multiple Signal Classification,MUSIC)算法进行二维波达方向(Direction of Arrival,DOA)和二维极化参数联合估计时,硬件资源占用大、运行时间长的问题,提出了一种基于极化MUSIC算法的四维参数联合估计FPGA实现架构。该架构包括信号协方差矩阵计算模块、Jacobi旋转模块、噪声子空间提取模块、两级空间谱搜索模块和极化参数计算模块。Jacobi旋转模块被拆分为多个可复用模块,并采用查找表模块生成旋转矩阵。一级空间谱搜索模块通过二维DOA搜索初步确定信源的角度信息。二级空间谱搜索模块根据一级搜索的角度结果确定二级搜索区域各点的极化信息,并计算该区域的四维空间谱,区域内最小值对应的四维参数信息即为最终估计的信源方向角、俯仰角、极化辅助角和极化相位角。仿真结果表明,与传统极化MUSIC算法的四维搜索算法相比,该架构避免了大量四维空间谱计算,同时保证了四维参数估计的精度,显著减少了运行时间和硬件资源消耗。展开更多
针对永磁电机电磁噪声定位问题,提出一种基于声源波达方位估计的电磁噪声诊断方法。该方法在电机由变频器供电的运行工况下进行多信道噪声采样,通过先验频率数据识别各噪声信道中的电机电磁噪声源特征,结合DBSCAN聚类算法和能量门限,有...针对永磁电机电磁噪声定位问题,提出一种基于声源波达方位估计的电磁噪声诊断方法。该方法在电机由变频器供电的运行工况下进行多信道噪声采样,通过先验频率数据识别各噪声信道中的电机电磁噪声源特征,结合DBSCAN聚类算法和能量门限,有效提取窄带信号。采用改进的噪声子空间重构算法——MCT-IRNSMUSIC对窄带信号进行波达方位(direction of arrival,DOA)估计,并通过自适应加权得到最终DOA估计结果。该算法拓展了阵列孔径,实现了针对多相干信号源的有效方位角估计,提高了混响环境下的准确性。仿真对比和实验结果表明,相较于传统算法,该方法具有更高的准确性和鲁棒性,其噪声源定位准确率可达96.2%,在工程应用中具有参考价值。展开更多
Confucius was born in the state of Lu,the cultural exemplar of ritual propriety and music during the Zhou Dynasty period.Immersed in this rich cultural environment,the young Confucius enjoyed laying out cups and bowls...Confucius was born in the state of Lu,the cultural exemplar of ritual propriety and music during the Zhou Dynasty period.Immersed in this rich cultural environment,the young Confucius enjoyed laying out cups and bowls fashioned from clay on a table,pretending to officiate at mock rituals.Confucius’early life laid the groundwork for his future development as a master of ritual propriety and music and the founder of the influential Confucian school.展开更多
Find lt What could Mozart also do really well?Conversation A(in the studio)Teaching lvy:Zach:Ivy:Zach:Ivy:Let's talk about music today,Zach.Sure,lvy!I love all kinds of music.Me,too.So,let's celebrate a famous...Find lt What could Mozart also do really well?Conversation A(in the studio)Teaching lvy:Zach:Ivy:Zach:Ivy:Let's talk about music today,Zach.Sure,lvy!I love all kinds of music.Me,too.So,let's celebrate a famous musician's birthday today.OK,whose birthday?Mozart's!He was born 270 years ago today.展开更多
Salzburg is a beautiful city in Austria.It has old buildings,pretty streets and big mountains all around.The scenery is amazing!The famous movie The Sound of Music was filmed there.Many people visit Salzburg to see th...Salzburg is a beautiful city in Austria.It has old buildings,pretty streets and big mountains all around.The scenery is amazing!The famous movie The Sound of Music was filmed there.Many people visit Salzburg to see the locations from the movie.Some even do interviews there to ask people their feelings about the movie.One famous location from the movie is the Mirabell Gardens.The actors sang the song"Do-Re-Mi"there.The gardens have colorful flowers,statues and fountains.Salzburg is a fun and exciting place to visit and explore.展开更多
Hong Kong zombie films,especially those starring Ching-Ying Lam,carry strong social significance and have left a deep impression on most audiences.One of the key elements contributing to this is sound,which serves to ...Hong Kong zombie films,especially those starring Ching-Ying Lam,carry strong social significance and have left a deep impression on most audiences.One of the key elements contributing to this is sound,which serves to create atmosphere,shape character images,and evoke intense psychological responses in viewers.This paper explores the classification and characteristics of Hong Kong zombie films,as well as the expression of sound elements in different forms of these films,aiming to fill the gap in sound research related to horror films.展开更多
The purpose of this article is to contextualize the world’s oldest art song directly associated with the railway-Travelling Song by the Russian composer Mikhail Glinka(1804-1857).The composer’s personal circumstance...The purpose of this article is to contextualize the world’s oldest art song directly associated with the railway-Travelling Song by the Russian composer Mikhail Glinka(1804-1857).The composer’s personal circumstances surrounding the creation of the song are examined,along with the historical and technical background of that era.While railways have always been associated with technological progress,new solutions for high-power engines,and the accuracy of arrival and departure timetables,the poetic and romantic side of train travel and railways in general has not yet received sufficient academic coverage.This essay is intended to partially fill this gap,though it rather outlines directions for possible development of its topical range.Each of the suggested reference points and stories is in itself an example of how the arts reflected the inspiration that cutting-edge technological advances of the period were exerting on artists,musicians,and other creative individuals.展开更多
What is spacetime?How do we perceive this medium?How can we fit it into our everyday linear lives?How can we situate ourselves within it in our post-industrial worldview,in an unsustainable world?This philosophical es...What is spacetime?How do we perceive this medium?How can we fit it into our everyday linear lives?How can we situate ourselves within it in our post-industrial worldview,in an unsustainable world?This philosophical essay adopts a phenomenological method to interrogate the meaning of this fundamental dimension of reality.Spacetime is interpreted not merely as a physical structure but as a plastic field whose instability shapes inner and social life.Yet the contemporary human condition is marked by a profound alienation,much of which derives from a self-inflicted existential disorientation:I once chose exile and moved to a remote island in the Atlantic Ocean,becoming my own research material.In search of genuine contact with nature,the nonverbal appeared as a necessity.I turned to music as an archetypal language,in the Romantic sense of a medium offering pre-conceptual access to the real.I composed Light Atlas,a six-movement work aiming to capture the flight of seagulls and the eternal struggle between light and darkness.This led me back to physics,to my original question:the lived perception of spacetime.展开更多
University students,fashion models,street musicians,recent graduates…hundreds of aspiring singers gathered on the campus of the University of Nairobi in Kenya for a music audition.Some had guitars slung across their ...University students,fashion models,street musicians,recent graduates…hundreds of aspiring singers gathered on the campus of the University of Nairobi in Kenya for a music audition.Some had guitars slung across their backs,others drummed rhythms on hand drums,and a few performed melodies they had written on their phones.展开更多
Background:Music has proven to be vital in enhancing resilience and promotingwell-being.Previously,the impact of music in sports environments was solely investigated,while this paper applies it to study environments,s...Background:Music has proven to be vital in enhancing resilience and promotingwell-being.Previously,the impact of music in sports environments was solely investigated,while this paper applies it to study environments,standing out as pioneering research.The study consists of a systematic development of a conceptual framework based on theories of Uses and Gratification Expectancy(UGE)and perceived motivation based on music elements.Their components are observed variables influencing students’psychological well-being(as the dependent variable).Resilience is examined as a mediator,influencing the relationships of both observed and dependent variables.The main purpose of this study is to highlight the positive effects of online music consumption on the psychological well-being of students.Methods:Semi-structured qualitative interviews were conducted with eighteen final year creative multimedia undergraduate students belonging to five central region Malaysian universities,especially on their UGE needs,and a similar concept survey instrument with two hundred participants.The interview data were analysed through thematic analysis,while the survey data through descriptive and Partial Least Squares Structural Equation Modeling(PLS-SEM).Results:The results highlight that students gain motivation from online music,which positively affects their psychological well-being(β=0.190,p=0.003,f^(2)=0.037),while resilience significantly affects this relationship(β=0.562,p<0.001,f^(2)=0.461).However,the results also predict a partial relationship between constructs based on UGE with psychological well-being,mediated by resilience,i.e.,AT-UGE(β=0.021,p=0.783,f^(2)=0.000),SIPI-UGE(β=0.228,p=0.004,f^(2)=0.044).Conclusion:The outcome of the study reflected practical,meaningful,and statistically significant results.The majority of the predictors,with the exception of one,i.e.,AT-UGE,displayed a clear positive relation of online music consumption on the Psychological Well-being of students.Future research will explore varying contextual factors impacting online music-related gratifications,motivations,and resilience,along with additional potential mediators and moderators.展开更多
Chinese video game Black Myth:Wukong has been a h it among gaming enthusiasts worldwide since its release in 2024, its breakout success demonstrating the potential global appeal of traditional Chinese culture. Based o...Chinese video game Black Myth:Wukong has been a h it among gaming enthusiasts worldwide since its release in 2024, its breakout success demonstrating the potential global appeal of traditional Chinese culture. Based on the 16th-century classic novel Journey to the West, the game not only introduces international audiences to Chinese literature but has also become a far-reaching platform for traditional Chinese music.展开更多
准确测量管道介质声速有助于分析介质的密度和组分,而传统的声速测量方法重复性低、鲁棒性差。为了实现介质声速的准确测量,首先,基于管道一维声波理论推导出线阵列传感器在管道轴向位置的声信号模型,介绍了空气与水的理论声速计算公式...准确测量管道介质声速有助于分析介质的密度和组分,而传统的声速测量方法重复性低、鲁棒性差。为了实现介质声速的准确测量,首先,基于管道一维声波理论推导出线阵列传感器在管道轴向位置的声信号模型,介绍了空气与水的理论声速计算公式以及不同管材、管径和壁厚对声速衰减的影响;其次,采用MUSIC(multiple signal classification)波束形成算法将多通道时域数据转换至波数频率域,呈现出斜率与声速相关的“声学脊”;最后,使用DN50不锈钢管道分别在水和空气流量标准装置上进行声速测量实验,与理论数据相比,水中声速的相对误差为1.61%,重复性为0.45%,空气中声速的相对误差为0.59%,重复性为1.27%。结果表明MUSIC算法可准确测量管道一维声波的介质声速。展开更多
针对传统波达方向(Direction of Arrival,DOA)估计方法在低信噪比、少快拍数条件下表现性能差甚至失效的问题,提出了一种基于重构频域协方差矩阵的波达方位估计方法。该方法根据转化的频域信号进行共轭反向修正实现对噪声的抑制,构造出...针对传统波达方向(Direction of Arrival,DOA)估计方法在低信噪比、少快拍数条件下表现性能差甚至失效的问题,提出了一种基于重构频域协方差矩阵的波达方位估计方法。该方法根据转化的频域信号进行共轭反向修正实现对噪声的抑制,构造出了新的频域协方差矩阵,利用平均噪声子空间建立空间谱估计函数,通过谱峰搜索估计出信源的方位角。经仿真对比分析,所提改进方法可以识别多个相干信号,并且在低信噪比、少快拍数条件下仍然获得较好的方位估计性能,估计误差较传统算法降低2%~25%。展开更多
文摘针对在现场可编程门阵列(Field Programmable Gate Array,FPGA)上实现基于极化敏感阵列的多重信号分类(Multiple Signal Classification,MUSIC)算法进行二维波达方向(Direction of Arrival,DOA)和二维极化参数联合估计时,硬件资源占用大、运行时间长的问题,提出了一种基于极化MUSIC算法的四维参数联合估计FPGA实现架构。该架构包括信号协方差矩阵计算模块、Jacobi旋转模块、噪声子空间提取模块、两级空间谱搜索模块和极化参数计算模块。Jacobi旋转模块被拆分为多个可复用模块,并采用查找表模块生成旋转矩阵。一级空间谱搜索模块通过二维DOA搜索初步确定信源的角度信息。二级空间谱搜索模块根据一级搜索的角度结果确定二级搜索区域各点的极化信息,并计算该区域的四维空间谱,区域内最小值对应的四维参数信息即为最终估计的信源方向角、俯仰角、极化辅助角和极化相位角。仿真结果表明,与传统极化MUSIC算法的四维搜索算法相比,该架构避免了大量四维空间谱计算,同时保证了四维参数估计的精度,显著减少了运行时间和硬件资源消耗。
文摘针对永磁电机电磁噪声定位问题,提出一种基于声源波达方位估计的电磁噪声诊断方法。该方法在电机由变频器供电的运行工况下进行多信道噪声采样,通过先验频率数据识别各噪声信道中的电机电磁噪声源特征,结合DBSCAN聚类算法和能量门限,有效提取窄带信号。采用改进的噪声子空间重构算法——MCT-IRNSMUSIC对窄带信号进行波达方位(direction of arrival,DOA)估计,并通过自适应加权得到最终DOA估计结果。该算法拓展了阵列孔径,实现了针对多相干信号源的有效方位角估计,提高了混响环境下的准确性。仿真对比和实验结果表明,相较于传统算法,该方法具有更高的准确性和鲁棒性,其噪声源定位准确率可达96.2%,在工程应用中具有参考价值。
文摘Confucius was born in the state of Lu,the cultural exemplar of ritual propriety and music during the Zhou Dynasty period.Immersed in this rich cultural environment,the young Confucius enjoyed laying out cups and bowls fashioned from clay on a table,pretending to officiate at mock rituals.Confucius’early life laid the groundwork for his future development as a master of ritual propriety and music and the founder of the influential Confucian school.
文摘Find lt What could Mozart also do really well?Conversation A(in the studio)Teaching lvy:Zach:Ivy:Zach:Ivy:Let's talk about music today,Zach.Sure,lvy!I love all kinds of music.Me,too.So,let's celebrate a famous musician's birthday today.OK,whose birthday?Mozart's!He was born 270 years ago today.
文摘Salzburg is a beautiful city in Austria.It has old buildings,pretty streets and big mountains all around.The scenery is amazing!The famous movie The Sound of Music was filmed there.Many people visit Salzburg to see the locations from the movie.Some even do interviews there to ask people their feelings about the movie.One famous location from the movie is the Mirabell Gardens.The actors sang the song"Do-Re-Mi"there.The gardens have colorful flowers,statues and fountains.Salzburg is a fun and exciting place to visit and explore.
文摘Hong Kong zombie films,especially those starring Ching-Ying Lam,carry strong social significance and have left a deep impression on most audiences.One of the key elements contributing to this is sound,which serves to create atmosphere,shape character images,and evoke intense psychological responses in viewers.This paper explores the classification and characteristics of Hong Kong zombie films,as well as the expression of sound elements in different forms of these films,aiming to fill the gap in sound research related to horror films.
文摘The purpose of this article is to contextualize the world’s oldest art song directly associated with the railway-Travelling Song by the Russian composer Mikhail Glinka(1804-1857).The composer’s personal circumstances surrounding the creation of the song are examined,along with the historical and technical background of that era.While railways have always been associated with technological progress,new solutions for high-power engines,and the accuracy of arrival and departure timetables,the poetic and romantic side of train travel and railways in general has not yet received sufficient academic coverage.This essay is intended to partially fill this gap,though it rather outlines directions for possible development of its topical range.Each of the suggested reference points and stories is in itself an example of how the arts reflected the inspiration that cutting-edge technological advances of the period were exerting on artists,musicians,and other creative individuals.
文摘What is spacetime?How do we perceive this medium?How can we fit it into our everyday linear lives?How can we situate ourselves within it in our post-industrial worldview,in an unsustainable world?This philosophical essay adopts a phenomenological method to interrogate the meaning of this fundamental dimension of reality.Spacetime is interpreted not merely as a physical structure but as a plastic field whose instability shapes inner and social life.Yet the contemporary human condition is marked by a profound alienation,much of which derives from a self-inflicted existential disorientation:I once chose exile and moved to a remote island in the Atlantic Ocean,becoming my own research material.In search of genuine contact with nature,the nonverbal appeared as a necessity.I turned to music as an archetypal language,in the Romantic sense of a medium offering pre-conceptual access to the real.I composed Light Atlas,a six-movement work aiming to capture the flight of seagulls and the eternal struggle between light and darkness.This led me back to physics,to my original question:the lived perception of spacetime.
文摘University students,fashion models,street musicians,recent graduates…hundreds of aspiring singers gathered on the campus of the University of Nairobi in Kenya for a music audition.Some had guitars slung across their backs,others drummed rhythms on hand drums,and a few performed melodies they had written on their phones.
基金funded by Malaysian Ministry of Higher Education(MOHE)under the Fundamental Research Grant Scheme(FRGS/1/2023/SSI07/MMU/02/3)which is awarded to the Multimedia University.The project is led by the second author.
文摘Background:Music has proven to be vital in enhancing resilience and promotingwell-being.Previously,the impact of music in sports environments was solely investigated,while this paper applies it to study environments,standing out as pioneering research.The study consists of a systematic development of a conceptual framework based on theories of Uses and Gratification Expectancy(UGE)and perceived motivation based on music elements.Their components are observed variables influencing students’psychological well-being(as the dependent variable).Resilience is examined as a mediator,influencing the relationships of both observed and dependent variables.The main purpose of this study is to highlight the positive effects of online music consumption on the psychological well-being of students.Methods:Semi-structured qualitative interviews were conducted with eighteen final year creative multimedia undergraduate students belonging to five central region Malaysian universities,especially on their UGE needs,and a similar concept survey instrument with two hundred participants.The interview data were analysed through thematic analysis,while the survey data through descriptive and Partial Least Squares Structural Equation Modeling(PLS-SEM).Results:The results highlight that students gain motivation from online music,which positively affects their psychological well-being(β=0.190,p=0.003,f^(2)=0.037),while resilience significantly affects this relationship(β=0.562,p<0.001,f^(2)=0.461).However,the results also predict a partial relationship between constructs based on UGE with psychological well-being,mediated by resilience,i.e.,AT-UGE(β=0.021,p=0.783,f^(2)=0.000),SIPI-UGE(β=0.228,p=0.004,f^(2)=0.044).Conclusion:The outcome of the study reflected practical,meaningful,and statistically significant results.The majority of the predictors,with the exception of one,i.e.,AT-UGE,displayed a clear positive relation of online music consumption on the Psychological Well-being of students.Future research will explore varying contextual factors impacting online music-related gratifications,motivations,and resilience,along with additional potential mediators and moderators.
文摘Chinese video game Black Myth:Wukong has been a h it among gaming enthusiasts worldwide since its release in 2024, its breakout success demonstrating the potential global appeal of traditional Chinese culture. Based on the 16th-century classic novel Journey to the West, the game not only introduces international audiences to Chinese literature but has also become a far-reaching platform for traditional Chinese music.
文摘准确测量管道介质声速有助于分析介质的密度和组分,而传统的声速测量方法重复性低、鲁棒性差。为了实现介质声速的准确测量,首先,基于管道一维声波理论推导出线阵列传感器在管道轴向位置的声信号模型,介绍了空气与水的理论声速计算公式以及不同管材、管径和壁厚对声速衰减的影响;其次,采用MUSIC(multiple signal classification)波束形成算法将多通道时域数据转换至波数频率域,呈现出斜率与声速相关的“声学脊”;最后,使用DN50不锈钢管道分别在水和空气流量标准装置上进行声速测量实验,与理论数据相比,水中声速的相对误差为1.61%,重复性为0.45%,空气中声速的相对误差为0.59%,重复性为1.27%。结果表明MUSIC算法可准确测量管道一维声波的介质声速。
文摘针对传统波达方向(Direction of Arrival,DOA)估计方法在低信噪比、少快拍数条件下表现性能差甚至失效的问题,提出了一种基于重构频域协方差矩阵的波达方位估计方法。该方法根据转化的频域信号进行共轭反向修正实现对噪声的抑制,构造出了新的频域协方差矩阵,利用平均噪声子空间建立空间谱估计函数,通过谱峰搜索估计出信源的方位角。经仿真对比分析,所提改进方法可以识别多个相干信号,并且在低信噪比、少快拍数条件下仍然获得较好的方位估计性能,估计误差较传统算法降低2%~25%。
