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“夫乐有适、心亦有适”古代审美主体的接受心理——读《吕氏春秋·适音》及相关文献笔记 被引量:3
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作者 夏燕靖 《浙江艺术职业学院学报》 2017年第3期10-18,共9页
从中国古代艺术审美角度来看,艺术之美不仅在于艺术载体呈现出来的表现形式,还在于艺术活动的创造者与接受者融合成为艺术欣赏审美主体的内心接受。通过对《吕氏春秋·适音》及相关文献的研习,探究"心适"与"音适&qu... 从中国古代艺术审美角度来看,艺术之美不仅在于艺术载体呈现出来的表现形式,还在于艺术活动的创造者与接受者融合成为艺术欣赏审美主体的内心接受。通过对《吕氏春秋·适音》及相关文献的研习,探究"心适"与"音适"在先秦各文论流派思想中的地位,以此表明中国古代艺术接受追求以"适"作为最高的审美理想。阐释中国古代审美主体以"适"为中心的接受心理,可谓是一种大巧若拙的艺术精神之境界。 展开更多
关键词 音适 心适 艺术接受
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A comparative study of the denoising methods of Thematic Mapper images for forest areas 被引量:1
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作者 赵正勇 王立海 《Journal of Forestry Research》 SCIE CAS CSCD 2007年第2期123-127,共5页
The noises of remote sensing images, caused by imaging system and ground environment, negatively affect the accuracy and efficiency in extracting forest information from remote sensing images. The denoising is critica... The noises of remote sensing images, caused by imaging system and ground environment, negatively affect the accuracy and efficiency in extracting forest information from remote sensing images. The denoising is critical for image classifications for forest areas. The objective of this research is to assess the effectiveness of currently used spatial filtering methods for extracting with forest information related from Landsat 5 TM images. Five spatial filtering methods including low-pass filter, median filter, mean filter, sigma filter and enhanced self-adaptive filter were examined. A set of evaluation indices was designed to assess the ability of each denoising method for flatness, edge/boundary retention and enhancement. Based on the designed evaluation indices and visual assessment, it was found that sigma filter (D=1) and enhanced self-adaptive filter were the most effective denoising methods in classifying TM images for forest areas. 展开更多
关键词 DENOISING Edge/boundary retention Enhanced self-adaptive filter TM image
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Noise Impact and Improvement on Indoors Acoustic Comfort for the Building Adjacent to Heavy Traffic Road 被引量:1
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作者 Li Zhisheng Li Dongmei +2 位作者 Mei Sheng Zhang Guoqiang Liu Jianlong 《Chinese Journal of Population,Resources and Environment》 北大核心 2007年第1期17-25,共9页
A good acoustic environment is absolutely essential to maintaining a high level satisfaction and moral health among residents. Noise and other boresome sounds come from both in- door and outdoor sources. For the resid... A good acoustic environment is absolutely essential to maintaining a high level satisfaction and moral health among residents. Noise and other boresome sounds come from both in- door and outdoor sources. For the residential buildings adjacent to heavy traffic roads, outdoors traffic noise is the main source that affects indoor acoustic quality and health. Ventilation and outdoor noise prevention become a pair of contradictions for the residents in China nowadays for those buildings adjacent to heavy traffic roads. It is investigated that traffic noise emission is mainly con- stituted by the motors of trucks, buses and motorcycles as well as brake. In this paper, two methods of traffic noise reduction on the indoor sound environment and comfort are carried out to study and compare the residential buildings adjacent to heavy traffic roadway in a city. One is to install noise barriers on the two sides of the roadway, which consist of sound-proof glass and plas- tic materials. The effect of sound-insulation of this method is heavily dependent on the relative distance between the noise bar- rier and indoors. A reduction of sound with an average pressure level of 2–15dB is achieved on the places behind and under the noise barrier. However, for the equivalent of noise barrier height, the noise reduction effect is little. As for the places of higher than the noise barrier, the traffic noise will be even strengthened by 3–7dB. Noise increment can be seen at the points of distance farther than 15m and height more than noise barrier; the noise reduction effect is not satisfactory or even worsened. In addition, not every location is appropriate to install the noise barrier along the heavy traffic roads. The other method of noise reduction for the buildings adjacent to heavy traffic is to install the airproof and soundproof windows, which is the conversion from natural venti- lation to mechanical ventilation. A reduction of sound with an average pressure level of 5dB to 17dB can be achieved compared with common glass windows, if adopting sound proof glass win- dows. These two methods are helpful to isolate high frequency noise but not for low frequency noise. For those frequency noises, installing thick and cotton curtain and porous carpet can only decrease 2.4–4.5dB, which hardly contributes to indoor sound comfort, so further study is demanded to cut down traffic noise, especially to cut down the low frequency noise. 展开更多
关键词 traffic road indoor noise COMFORT noise barrier noise proof window impact
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Space discriminative function for microphone array robust speech recognition
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作者 赵贤宇 Ou Zhijian Wang Zuoying 《High Technology Letters》 EI CAS 2005年第4期351-354,共4页
Based on W-disjoint orthogonality of speech mixtures, a space d,scnmlnative tunetlon was proposer1 to enumerate and localize competing speakers in the surrounding environments. Then, a Wiener-like postfiherer was deve... Based on W-disjoint orthogonality of speech mixtures, a space d,scnmlnative tunetlon was proposer1 to enumerate and localize competing speakers in the surrounding environments. Then, a Wiener-like postfiherer was developed to adaptively suppress interferences. Experimental results with a hands-free speech recognizer under various SNR and competing speakers settings show that nearly 69 % error reduction can be obtained with a two-channel small aperture microphone array against the conventional single microphone baseline system. Comparisons were made against traditional delay-and-sum and Griffiths-Jim adaptive beamforming techniques to further assess the effectiveness of this method. 展开更多
关键词 speech recognition array signal processing microphone array source localization adaptive filtering
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Adaptive bands filter bank optimized by genetic algorithm for robust speech recognition system 被引量:5
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作者 黄丽霞 G.Evangelista 张雪英 《Journal of Central South University》 SCIE EI CAS 2011年第5期1595-1601,共7页
Perceptual auditory filter banks such as Bark-scale filter bank are widely used as front-end processing in speech recognition systems.However,the problem of the design of optimized filter banks that provide higher acc... Perceptual auditory filter banks such as Bark-scale filter bank are widely used as front-end processing in speech recognition systems.However,the problem of the design of optimized filter banks that provide higher accuracy in recognition tasks is still open.Owing to spectral analysis in feature extraction,an adaptive bands filter bank (ABFB) is presented.The design adopts flexible bandwidths and center frequencies for the frequency responses of the filters and utilizes genetic algorithm (GA) to optimize the design parameters.The optimization process is realized by combining the front-end filter bank with the back-end recognition network in the performance evaluation loop.The deployment of ABFB together with zero-crossing peak amplitude (ZCPA) feature as a front process for radial basis function (RBF) system shows significant improvement in robustness compared with the Bark-scale filter bank.In ABFB,several sub-bands are still more concentrated toward lower frequency but their exact locations are determined by the performance rather than the perceptual criteria.For the ease of optimization,only symmetrical bands are considered here,which still provide satisfactory results. 展开更多
关键词 perceptual filter banks bark scale speaker independent speech recognition systems zero-crossing peak amplitude genetic algorithm
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A Combined Speaker Adaptation Method for Mandarin Speech Recognition
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作者 徐向华 朱杰 《Journal of Shanghai Jiaotong university(Science)》 EI 2004年第4期21-24,共4页
A speaker adaptation method that combines transformation matrix linear interpolation with maximum a posteriori (MAP) was proposed. Firstly this method can keep the asymptotical characteristic of MAP. Secondly, as the ... A speaker adaptation method that combines transformation matrix linear interpolation with maximum a posteriori (MAP) was proposed. Firstly this method can keep the asymptotical characteristic of MAP. Secondly, as the method uses linear interpolation with several speaker-dependent (SD) transformation matrixes, it can fully use the prior knowledge and keep fast adaptation. The experimental results show that the combined method achieves an 8.24% word error rate reduction with only one adaptation utterance, and keeps asymptotic to the performance of SD model for large amounts of adaptation data. 展开更多
关键词 speech recognition speaker adaptation maximum a posteriori (MAP) maximum likelihood model interpolation (MLMI)
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A Blind Spectrum Sensing Based on Low-Rank and Sparse Matrix Decomposition
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作者 Junsheng Mu Xiaojun Jing +1 位作者 Hai Huang Ning Gao 《China Communications》 SCIE CSCD 2018年第8期118-125,共8页
As a crucial component in Cognitive Radio(CR) networks, spectrum sensing has been attracting lots of attention. Some conventional methods for spectrum sensing are sensitive to uncertain signal and noise, its applicabi... As a crucial component in Cognitive Radio(CR) networks, spectrum sensing has been attracting lots of attention. Some conventional methods for spectrum sensing are sensitive to uncertain signal and noise, its applicability is limited thereof. In this paper, a novel blind spectrum sensing method is proposed, where low-rank and sparse matrix decomposition is applied to the observation signal of a CR in the frequency domain. Then the ratio of the energy of the sparse part and the received signal in the time domain is considered as the criterion to decide whether the radio frequency band is idle by means of a comparison with a predefined threshold. The proposed method is independent of prior knowledge of signal and white noise, and has a better detection performance. Simulation experiments verify the performance of the proposed method in additive white Gaussian noise(AWGN), Rayleighand Rician channels. 展开更多
关键词 spectrum sensing cognitive radio OFDM RAYLEIGH AWGN
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HYBRID INTERFERENCE CANCELLATION SCHEME FOR BLIND MULTIUSER DETECTION IN MULTIPATH FADING CHANNELS
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作者 FuHaiyang ZhaoChunming 《Journal of Electronics(China)》 2002年第1期43-49,共7页
This paper introduces and analyzes a detection scheme for adaptive suppression of Multiuser Access Interference (MAI) and MultiPath Distortion (MPD) for mobile station of DS/CDMA system. The proposed detection scheme ... This paper introduces and analyzes a detection scheme for adaptive suppression of Multiuser Access Interference (MAI) and MultiPath Distortion (MPD) for mobile station of DS/CDMA system. The proposed detection scheme may amount to a RAKE receiver structure,wherein each branch is considered as a linear multiuser filter designed under a Linear Constrained Minimum Variance (LCMV) optimization strategy to suppress MAI, followed by a proper combining rule to suppress MPD. The adaptive blind multiuser detecting and optimum combining of the proposed receiver are realized, based on the Least-Mean-Square (LMS) algorithm and an adaptive vector tracking algorithm respectively. Finally, the feasibility of the above two algorithms is proved by the numerical results provided by computer simulation. 展开更多
关键词 Blind adaptive multiuser detection RAKE receiver Matrix projection Adaptive vector tracking
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“乐本体”思维模式在秦汉道家音乐思想学理性思考中的存在--以《吕氏春秋》中《大乐》、《适音》为例的分析 被引量:9
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作者 修海林 《中国音乐学》 CSSCI 北大核心 2012年第2期114-119,共6页
本文认为,当《吕氏春秋》对"适"的概念从"行适"、"心适"、"音适"这三个方面作具体的概念界定时,就已经将一种认识音乐存在的思维模式(甚至文化模式)呈现在我们面前。从学理的角度看,其概念界... 本文认为,当《吕氏春秋》对"适"的概念从"行适"、"心适"、"音适"这三个方面作具体的概念界定时,就已经将一种认识音乐存在的思维模式(甚至文化模式)呈现在我们面前。从学理的角度看,其概念界定和区分本身,已经具备从"行为、形态、观念"三要素来认识音乐的理论特征,这正是"乐本体"思维模式在两千多年前的具体呈现。本文还认为,在《吕氏春秋》的天道自然观中,音乐的产生具有数理基础和物质基础这两个基础,并指出,《大乐》、《适音》诸篇中使用的"和"、"适"这两个概念,都是为认识和把握事物存在的内在规律和法则而设定的概念,具有不同以往的音乐哲学思维高度。 展开更多
关键词 “乐本体”思维模式 吕氏春秋 秦汉道家音乐思想 行适 心适 音适
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