Pub Date : 2017-11-01DOI: 10.1109/ISPACS.2017.8266491
Qihui Ling, Qian-Cheng Zhao, Xian Wang, Xiaoqiang Yan
The severe vibration of hot strip tandem mill is general problems, when it rolls high strength and thin strip. For the study of this problem, the online monitoring system is used to obtain the vibration signal. The motor output torque, the hydraulic cylinder oil pressure and the work roll acceleration have similar frequencies by Fourier transform. This problem motivates analysing and predicting the mill dynamics by using a finite element models. The simulation models developed in the ANSYS environment is used to calculate the natural frequencies and mode shapes, and distinguish the effects of motor torque excitation, hydraulic excitation, and combined-excitations. Both the vertical vibration and horizontal vibration were investigated. The maximum displacement and amplitude of chatter frequency were larger in the horizontal than in the vertical. To reduce chatter vibration, a method of inhibition of horizontal vibration and vertical vibration has been presented. The simulation results and experiment both show that the method is effective.
{"title":"Work rolls vibration characteristic under multi-source excitation in hot strip tandem mill","authors":"Qihui Ling, Qian-Cheng Zhao, Xian Wang, Xiaoqiang Yan","doi":"10.1109/ISPACS.2017.8266491","DOIUrl":"https://doi.org/10.1109/ISPACS.2017.8266491","url":null,"abstract":"The severe vibration of hot strip tandem mill is general problems, when it rolls high strength and thin strip. For the study of this problem, the online monitoring system is used to obtain the vibration signal. The motor output torque, the hydraulic cylinder oil pressure and the work roll acceleration have similar frequencies by Fourier transform. This problem motivates analysing and predicting the mill dynamics by using a finite element models. The simulation models developed in the ANSYS environment is used to calculate the natural frequencies and mode shapes, and distinguish the effects of motor torque excitation, hydraulic excitation, and combined-excitations. Both the vertical vibration and horizontal vibration were investigated. The maximum displacement and amplitude of chatter frequency were larger in the horizontal than in the vertical. To reduce chatter vibration, a method of inhibition of horizontal vibration and vertical vibration has been presented. The simulation results and experiment both show that the method is effective.","PeriodicalId":166414,"journal":{"name":"2017 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133618020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-11-01DOI: 10.1109/ISPACS.2017.8266475
Daiki Watanabe, Yosuke Sugiura, T. Shimamura, H. Makinae
In this paper, we propose a bone-conducted (BC) speech enhancement method using a deep neural network (DNN). Focusing on that the vocal tract components appear only on the low-order cepstrum, we restore the low-order cepstrum of BC speech so as to be close to that of AC speech. The results in experiments show that BC speech processed by the proposed method becomes more similar to AC speech than the conventional method.
{"title":"Speech enhancement for bone-conducted speech based on low-order cepstrum restoration","authors":"Daiki Watanabe, Yosuke Sugiura, T. Shimamura, H. Makinae","doi":"10.1109/ISPACS.2017.8266475","DOIUrl":"https://doi.org/10.1109/ISPACS.2017.8266475","url":null,"abstract":"In this paper, we propose a bone-conducted (BC) speech enhancement method using a deep neural network (DNN). Focusing on that the vocal tract components appear only on the low-order cepstrum, we restore the low-order cepstrum of BC speech so as to be close to that of AC speech. The results in experiments show that BC speech processed by the proposed method becomes more similar to AC speech than the conventional method.","PeriodicalId":166414,"journal":{"name":"2017 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129738506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-11-01DOI: 10.1109/ISPACS.2017.8266442
Ning Lu, Guohui Li
In this work, we design a novel full reference (FR) quality evaluation approach of screen content images (SCIs) based on high order derivative variation model. The major contribution of this paper is the consideration that the human visual system (HVS) is sensitive to derivative information, and we apply the sensitivity property to evaluate the perceptual visual quality of SCIs. Specifically, we employ first-order derivative information to calculate quality map which quantifies the degradation of SCIs. Then, second-order derivative information is utilized to generate the weighting map. Finally, we get the overall quality score by incorporating the weighting map and quality map. The comparison experiments on a public SCI database demonstrate that the proposed approach can obtain the higher accuracy than other relevant ones in visual quality prediction of SCIs.
{"title":"A full reference quality assessment approach for screen content images based on high order derivative variation model","authors":"Ning Lu, Guohui Li","doi":"10.1109/ISPACS.2017.8266442","DOIUrl":"https://doi.org/10.1109/ISPACS.2017.8266442","url":null,"abstract":"In this work, we design a novel full reference (FR) quality evaluation approach of screen content images (SCIs) based on high order derivative variation model. The major contribution of this paper is the consideration that the human visual system (HVS) is sensitive to derivative information, and we apply the sensitivity property to evaluate the perceptual visual quality of SCIs. Specifically, we employ first-order derivative information to calculate quality map which quantifies the degradation of SCIs. Then, second-order derivative information is utilized to generate the weighting map. Finally, we get the overall quality score by incorporating the weighting map and quality map. The comparison experiments on a public SCI database demonstrate that the proposed approach can obtain the higher accuracy than other relevant ones in visual quality prediction of SCIs.","PeriodicalId":166414,"journal":{"name":"2017 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132058491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-11-01DOI: 10.1109/ISPACS.2017.8266501
Jianhuan Wei, Baojiang Zhong
Existing saliency detection algorithms work merely in one domain, i.e., spatial domain or frequency domain. This is not sufficient to process different types of images. To overcome this difficulty, we propose an algorithm that could deal with any type of images. Firstly, an image classifier is trained to classify different categories of images. Then, we adopt a strategy to process different types of images with different kinds of saliency detectors. Finally, an enhanced segmentation algorithm is employed to improve the quality of saliency map. Extensive simulation results show that our proposed method outperforms existing seven state-of-the-art algorithms.
{"title":"Saliency detection across spatial and frequency domains","authors":"Jianhuan Wei, Baojiang Zhong","doi":"10.1109/ISPACS.2017.8266501","DOIUrl":"https://doi.org/10.1109/ISPACS.2017.8266501","url":null,"abstract":"Existing saliency detection algorithms work merely in one domain, i.e., spatial domain or frequency domain. This is not sufficient to process different types of images. To overcome this difficulty, we propose an algorithm that could deal with any type of images. Firstly, an image classifier is trained to classify different categories of images. Then, we adopt a strategy to process different types of images with different kinds of saliency detectors. Finally, an enhanced segmentation algorithm is employed to improve the quality of saliency map. Extensive simulation results show that our proposed method outperforms existing seven state-of-the-art algorithms.","PeriodicalId":166414,"journal":{"name":"2017 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114865305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-11-01DOI: 10.1109/ISPACS.2017.8266579
Lv Yan, Song Li, Xin Tian
Predicting rate without coding is useful for compressing images in a limited communication network. In this paper, a rate prediction model is proposed for image compression methods based on Lapped Biorthogonal Transform (LBT), such as JPEG XR coding standard. The 3-D mapping relationship among the quantization parameter, the image activity, and the coding rate is constructed. Then the coding rate could be estimated by the image activity. In addition, the quantization parameter could also be used for predicting the compression quality (measured by PSNR). Experimental results show that the relative average error of the predicted code rate is 0.03b/p, which can meet the demand of most common applications. The algorithm is simple and the memory consumption is also low. Therefore, it is valuable for image compression methods based on LBT.
{"title":"Rate prediction for image compression based on lapped biorthogonal transform","authors":"Lv Yan, Song Li, Xin Tian","doi":"10.1109/ISPACS.2017.8266579","DOIUrl":"https://doi.org/10.1109/ISPACS.2017.8266579","url":null,"abstract":"Predicting rate without coding is useful for compressing images in a limited communication network. In this paper, a rate prediction model is proposed for image compression methods based on Lapped Biorthogonal Transform (LBT), such as JPEG XR coding standard. The 3-D mapping relationship among the quantization parameter, the image activity, and the coding rate is constructed. Then the coding rate could be estimated by the image activity. In addition, the quantization parameter could also be used for predicting the compression quality (measured by PSNR). Experimental results show that the relative average error of the predicted code rate is 0.03b/p, which can meet the demand of most common applications. The algorithm is simple and the memory consumption is also low. Therefore, it is valuable for image compression methods based on LBT.","PeriodicalId":166414,"journal":{"name":"2017 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115053679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-11-01DOI: 10.1109/ISPACS.2017.8266577
Manimel Wadu Sahan Dulara, N. Tsukiji, Y. Kobori, Koyo Asaishi, N. Takai, Haruo Kobayashi
This paper proposes a delay-time suppression technique in a DC/DC buck converter with voltage mode PWM control for fast response to its load change. Sudden load current change is detected through a high pass filter at the converter output, which turns on the power transistor switch in a DC/DC converter instantaneously. Then the control time-delay is suppressed and quick response is realized. Our circuit simulation shows that using the proposed circuit, the undershoot/overshoot voltage at the output is suppressed significantly, compared to the conventional circuit. We have compared the undershoot/overshoot voltages with multi-phases, and the sudden load current changes with frequency. Furthermore, we have compared undershoot/overshoot voltages with load current.
{"title":"Delay-time suppression technique for DC/DC buck converter using voltage mode PWM control","authors":"Manimel Wadu Sahan Dulara, N. Tsukiji, Y. Kobori, Koyo Asaishi, N. Takai, Haruo Kobayashi","doi":"10.1109/ISPACS.2017.8266577","DOIUrl":"https://doi.org/10.1109/ISPACS.2017.8266577","url":null,"abstract":"This paper proposes a delay-time suppression technique in a DC/DC buck converter with voltage mode PWM control for fast response to its load change. Sudden load current change is detected through a high pass filter at the converter output, which turns on the power transistor switch in a DC/DC converter instantaneously. Then the control time-delay is suppressed and quick response is realized. Our circuit simulation shows that using the proposed circuit, the undershoot/overshoot voltage at the output is suppressed significantly, compared to the conventional circuit. We have compared the undershoot/overshoot voltages with multi-phases, and the sudden load current changes with frequency. Furthermore, we have compared undershoot/overshoot voltages with load current.","PeriodicalId":166414,"journal":{"name":"2017 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115163514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-11-01DOI: 10.1109/ISPACS.2017.8266470
Zhipeng Zeng, H. Zeng, J. Chen, Junhui Hou, C. Cai, K. Ma
In High efficiency video coding (HEVC), rate distortion optimization (RDO) technique plays a crucial part in improving video coding efficiency. However, the perceptual characteristics of human visual system (HVS) are not taken into consideration in the process of RDO. In this paper, given the prediction patterns of intra frame, a novel direction-based just-noticeable-distortion (DRJND) model as a perceptual feature is introduced to HEVC encoder, which adaptively adjust Lagrange multiplier. Meanwhile, the rate-distortion (RD) cost also needs to be perceptually calculated once again. Experimental results demonstrate that compared with the anchor HM12.0, the proposed algorithm has achieved better experimental results in rate-SSIM performance while keeping its visual quality of the same test sequences.
{"title":"A novel direction-based JND model for perceptual HEVC intra coding","authors":"Zhipeng Zeng, H. Zeng, J. Chen, Junhui Hou, C. Cai, K. Ma","doi":"10.1109/ISPACS.2017.8266470","DOIUrl":"https://doi.org/10.1109/ISPACS.2017.8266470","url":null,"abstract":"In High efficiency video coding (HEVC), rate distortion optimization (RDO) technique plays a crucial part in improving video coding efficiency. However, the perceptual characteristics of human visual system (HVS) are not taken into consideration in the process of RDO. In this paper, given the prediction patterns of intra frame, a novel direction-based just-noticeable-distortion (DRJND) model as a perceptual feature is introduced to HEVC encoder, which adaptively adjust Lagrange multiplier. Meanwhile, the rate-distortion (RD) cost also needs to be perceptually calculated once again. Experimental results demonstrate that compared with the anchor HM12.0, the proposed algorithm has achieved better experimental results in rate-SSIM performance while keeping its visual quality of the same test sequences.","PeriodicalId":166414,"journal":{"name":"2017 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132390213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Identification of spikes in the extracellular recording signals is a technical challenge because of large amounts of background noise and contributions of many neurons to recorded signals. In this paper, a novel method based on sparse representation is proposed for high accuracy and robust spike detection. Considering the diversity of spikes, a universal dictionary is first learned for giving a sparse representation to various spike signals. In addition, in order to improve the robustness to noise, we propose to use sparse coefficients as features for the discrimination of spikes. Finally, the number and locations of spike events in the recorded signal are determined through a thresholding process. Experimental results on both synthesized extracellular neural recordings and real data demonstrate that the proposed method performs much better than the existing methods in terms of both robustness and flexibility.
{"title":"A novel extracellular spike detection algorithm based on sparse representation","authors":"Zuozhi Liu, Guanmi Chen, Guangming Shi, Jinjian Wu, Xuemei Xie","doi":"10.1109/ISPACS.2017.8266517","DOIUrl":"https://doi.org/10.1109/ISPACS.2017.8266517","url":null,"abstract":"Identification of spikes in the extracellular recording signals is a technical challenge because of large amounts of background noise and contributions of many neurons to recorded signals. In this paper, a novel method based on sparse representation is proposed for high accuracy and robust spike detection. Considering the diversity of spikes, a universal dictionary is first learned for giving a sparse representation to various spike signals. In addition, in order to improve the robustness to noise, we propose to use sparse coefficients as features for the discrimination of spikes. Finally, the number and locations of spike events in the recorded signal are determined through a thresholding process. Experimental results on both synthesized extracellular neural recordings and real data demonstrate that the proposed method performs much better than the existing methods in terms of both robustness and flexibility.","PeriodicalId":166414,"journal":{"name":"2017 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116562315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-11-01DOI: 10.1109/ISPACS.2017.8266547
Hanlong Hong, Pengfei Shao, Xifeng Xu, Hao Chen
Under DC bias, the Converter transformer works from non-saturated area to saturated area. The harmonic current and harmonic magnetic flux of winding will increase. The converter transformer will badly vibrate. In this paper, we build a model of converter transformer by MATLAB which can be add DC voltage on line side or valve side. Under the two conditions, we can get harmonic current value of windings. A 2D FEM model of transformer can be build by ANSYS. According to the theory of coupled field-circuit, the converter transformer can be solved by transient. And Contrasting the electromagnetic properties of converter transformer in two conditions.
{"title":"Study on suppressing harmonic flux density of converter transformer core under the DC bias","authors":"Hanlong Hong, Pengfei Shao, Xifeng Xu, Hao Chen","doi":"10.1109/ISPACS.2017.8266547","DOIUrl":"https://doi.org/10.1109/ISPACS.2017.8266547","url":null,"abstract":"Under DC bias, the Converter transformer works from non-saturated area to saturated area. The harmonic current and harmonic magnetic flux of winding will increase. The converter transformer will badly vibrate. In this paper, we build a model of converter transformer by MATLAB which can be add DC voltage on line side or valve side. Under the two conditions, we can get harmonic current value of windings. A 2D FEM model of transformer can be build by ANSYS. According to the theory of coupled field-circuit, the converter transformer can be solved by transient. And Contrasting the electromagnetic properties of converter transformer in two conditions.","PeriodicalId":166414,"journal":{"name":"2017 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123439597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-11-01DOI: 10.1109/ISPACS.2017.8266451
Dong Zhao, Long Xu, Linjie Chen, Jun Cheng, Li Zhang, Yihua Yan
The MUSER is a solar-dedicated radio interferometric array, which will simultaneously make high time, space and frequency resolution images of the Sun. Solar radio imaging is dependent upon deconvolution algorithm to counteract the sparse sampling of the Fourier plane. Recently, the deconvolution method used in MUSER imaging is Hogbom CLEAN algorithm. This algorithm works extremely well for collections of point sources; however, for extended objects, such as the solar disk, it should be improved by adopting the multi-scale approach. In this work we employ and improve the Cornwell Multi-scale CLEAN (2008) as the deconvolution method in MUSER solar radio imaging. Experimental results demonstrate the effectiveness and efficiency of the Multi-scale CLEAN in MUSER solar radio imaging.
{"title":"Multi-scale clean deconvolution for solar radio imaging with Mingantu Ultrawide Spectral Radioheliograph (MUSER)","authors":"Dong Zhao, Long Xu, Linjie Chen, Jun Cheng, Li Zhang, Yihua Yan","doi":"10.1109/ISPACS.2017.8266451","DOIUrl":"https://doi.org/10.1109/ISPACS.2017.8266451","url":null,"abstract":"The MUSER is a solar-dedicated radio interferometric array, which will simultaneously make high time, space and frequency resolution images of the Sun. Solar radio imaging is dependent upon deconvolution algorithm to counteract the sparse sampling of the Fourier plane. Recently, the deconvolution method used in MUSER imaging is Hogbom CLEAN algorithm. This algorithm works extremely well for collections of point sources; however, for extended objects, such as the solar disk, it should be improved by adopting the multi-scale approach. In this work we employ and improve the Cornwell Multi-scale CLEAN (2008) as the deconvolution method in MUSER solar radio imaging. Experimental results demonstrate the effectiveness and efficiency of the Multi-scale CLEAN in MUSER solar radio imaging.","PeriodicalId":166414,"journal":{"name":"2017 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123616602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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