Pub Date : 2014-04-26DOI: 10.1109/ICIST.2014.6920393
Qing-feng Lu, Xin-Sheng Ji, Kai-zhi Huang
This paper analyses the nonlinear clipping distortion of asymmetrically clipped optical OFDM (ACO-OFDM) based visible light communications system (VLC) and proposes an optimal power allocation method for reducing the clipping distortion. Firstly, we analyze the LED nonlinear clipping distortion based on the clipping process model that original signal directly added nonlinear clipping distortion components. Then, the effective signal to noise ratio (ESNR) is defined to measure the clipping distortion, and the clipping distortion analysis is converted into ESNR analysis. Finally, the optimal power allocation under optical power constraints base on the principle of ESNR optimum is proposed. Simulation results show that reasonable power allocation can effectively reduce the LED nonlinear clipping distortion and ensure that the bit error rate (BER) is less than 10-3.
{"title":"Clipping distortion analysis and optimal power allocation for ACO-OFDM based visible light communication","authors":"Qing-feng Lu, Xin-Sheng Ji, Kai-zhi Huang","doi":"10.1109/ICIST.2014.6920393","DOIUrl":"https://doi.org/10.1109/ICIST.2014.6920393","url":null,"abstract":"This paper analyses the nonlinear clipping distortion of asymmetrically clipped optical OFDM (ACO-OFDM) based visible light communications system (VLC) and proposes an optimal power allocation method for reducing the clipping distortion. Firstly, we analyze the LED nonlinear clipping distortion based on the clipping process model that original signal directly added nonlinear clipping distortion components. Then, the effective signal to noise ratio (ESNR) is defined to measure the clipping distortion, and the clipping distortion analysis is converted into ESNR analysis. Finally, the optimal power allocation under optical power constraints base on the principle of ESNR optimum is proposed. Simulation results show that reasonable power allocation can effectively reduce the LED nonlinear clipping distortion and ensure that the bit error rate (BER) is less than 10-3.","PeriodicalId":306383,"journal":{"name":"2014 4th IEEE International Conference on Information Science and Technology","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128997188","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 : 2014-04-26DOI: 10.1109/ICIST.2014.6920396
Shun Kasahara, N. Minematsu, Han-Ping Shen, D. Saito, K. Hirose
English is the only language available for international communication and is used by approximately 1.5 billions of speakers. It is also known to have a large diversity of pronunciation partly due to the influence of the speakers' mother tongue, called accents. Our project aims at creating a global and individual-basis map of English pronunciations to be used in teaching and learning World Englishes (WE) as well as research studies of WE [1], [2]. Creating the map mathematically requires a distance matrix in terms of pronunciation differences among all the speakers considered, and technically requires a method of predicting the pronunciation distance between any pair of the speakers. Our previous but very recent study [3] combined invariant pronunciation structure analysis [4], [5], [6], [7] and Support Vector Regression (SVR) effectively to predict the interspeaker pronunciation distances. In [3], very high correlation of 0.903 was observed between reference IPA-based pronunciation distances and the distances predicted by our proposed method. In this paper, after explaining our proposed method, some new results of analytical investigation of the method are described.
{"title":"Structure-based prediction of English pronunciation distances and its analytical investigation","authors":"Shun Kasahara, N. Minematsu, Han-Ping Shen, D. Saito, K. Hirose","doi":"10.1109/ICIST.2014.6920396","DOIUrl":"https://doi.org/10.1109/ICIST.2014.6920396","url":null,"abstract":"English is the only language available for international communication and is used by approximately 1.5 billions of speakers. It is also known to have a large diversity of pronunciation partly due to the influence of the speakers' mother tongue, called accents. Our project aims at creating a global and individual-basis map of English pronunciations to be used in teaching and learning World Englishes (WE) as well as research studies of WE [1], [2]. Creating the map mathematically requires a distance matrix in terms of pronunciation differences among all the speakers considered, and technically requires a method of predicting the pronunciation distance between any pair of the speakers. Our previous but very recent study [3] combined invariant pronunciation structure analysis [4], [5], [6], [7] and Support Vector Regression (SVR) effectively to predict the interspeaker pronunciation distances. In [3], very high correlation of 0.903 was observed between reference IPA-based pronunciation distances and the distances predicted by our proposed method. In this paper, after explaining our proposed method, some new results of analytical investigation of the method are described.","PeriodicalId":306383,"journal":{"name":"2014 4th IEEE International Conference on Information Science and Technology","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128696615","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 : 2014-04-26DOI: 10.1109/ICIST.2014.6920373
Wang Pei, Shi Wei-ren, Lu Jun
In computer control optical surfacing technology (CCOS), removal function and dwell time optimization are hot research topics. The polishing process is susceptible to the environment interference and the removal function is instable. Thus, it is difficult to develop the optimal dwell time function. This paper focuses on the sine function and cubic function initial surface and aims to obtain the dwell time function under different conditions by changing the revolution ratio. Since the dwell time function's smoothness is one of major factors which affect the processing, difference rate algorithm is proposed to judge and the corresponding eccentricity and revolution ratio are obvious. In this way, it can provide the optimal parameters for the actual polishing and improve the processing efficiency.
{"title":"The optimization dwell time function based on difference rate algorithm","authors":"Wang Pei, Shi Wei-ren, Lu Jun","doi":"10.1109/ICIST.2014.6920373","DOIUrl":"https://doi.org/10.1109/ICIST.2014.6920373","url":null,"abstract":"In computer control optical surfacing technology (CCOS), removal function and dwell time optimization are hot research topics. The polishing process is susceptible to the environment interference and the removal function is instable. Thus, it is difficult to develop the optimal dwell time function. This paper focuses on the sine function and cubic function initial surface and aims to obtain the dwell time function under different conditions by changing the revolution ratio. Since the dwell time function's smoothness is one of major factors which affect the processing, difference rate algorithm is proposed to judge and the corresponding eccentricity and revolution ratio are obvious. In this way, it can provide the optimal parameters for the actual polishing and improve the processing efficiency.","PeriodicalId":306383,"journal":{"name":"2014 4th IEEE International Conference on Information Science and Technology","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129051964","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 : 2014-04-26DOI: 10.1109/ICIST.2014.6920372
Wei Ni, Yanzhu Liu, Su Zhang, Yanhui Yang, Jichun Bu
A buffer allocation algorithm based on self-similar queuing model is proposed, with the consideration of self-similar communication characteristics of Networks-on-Chip and virtual-channels. It calculates the overflow probability of each virtual-channel according the Discrete Poisson Pareto Burst Process (DPPBP) model, which is the basis of distributing buffer resources. And the experimental results indicate that the average packet latency is lower than that of existing algorithm in the condition of the same buffer resources.
{"title":"A buffer allocation algorithm for network-on-chip with self-similar traffic","authors":"Wei Ni, Yanzhu Liu, Su Zhang, Yanhui Yang, Jichun Bu","doi":"10.1109/ICIST.2014.6920372","DOIUrl":"https://doi.org/10.1109/ICIST.2014.6920372","url":null,"abstract":"A buffer allocation algorithm based on self-similar queuing model is proposed, with the consideration of self-similar communication characteristics of Networks-on-Chip and virtual-channels. It calculates the overflow probability of each virtual-channel according the Discrete Poisson Pareto Burst Process (DPPBP) model, which is the basis of distributing buffer resources. And the experimental results indicate that the average packet latency is lower than that of existing algorithm in the condition of the same buffer resources.","PeriodicalId":306383,"journal":{"name":"2014 4th IEEE International Conference on Information Science and Technology","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122715256","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 : 2014-04-26DOI: 10.1109/ICIST.2014.6920583
Ganfeng Qiang, Lijun Yue, Fengqi Yu
In this paper, a novel method of background subtraction and update is proposed for indoor surveillance. It is based on the hypothesis that the foreground pixel's luminance and chroma fluctuate due to the movement of object. Different from the previous algorithms, this method takes each pixel's time continuity in video sequence into consideration. It still works well even the background is visible for a short time. The experimental results show that the proposed method has good performance for indoor scenes.
{"title":"A novel method of background subtraction for indoor surveillance","authors":"Ganfeng Qiang, Lijun Yue, Fengqi Yu","doi":"10.1109/ICIST.2014.6920583","DOIUrl":"https://doi.org/10.1109/ICIST.2014.6920583","url":null,"abstract":"In this paper, a novel method of background subtraction and update is proposed for indoor surveillance. It is based on the hypothesis that the foreground pixel's luminance and chroma fluctuate due to the movement of object. Different from the previous algorithms, this method takes each pixel's time continuity in video sequence into consideration. It still works well even the background is visible for a short time. The experimental results show that the proposed method has good performance for indoor scenes.","PeriodicalId":306383,"journal":{"name":"2014 4th IEEE International Conference on Information Science and Technology","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123059791","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 : 2014-04-26DOI: 10.1109/ICIST.2014.6920508
L. N. Zhang, X. Ye, Z. B. Xu, Y. W. Du, Z. Hou, X. Bai, P. Shang
To obtain the morphological measurements of acetabulum for southern Chinese population, 40 volunteers were evaluated by CT scan. The 3D model of pelvis was reconstructed from CT scan images. The AVA, ABA and SID were measured for both sides. The mean AVA, ABA showed no significant difference for sex and both sides. But the SID showed the opposite results. The comparison of these parameters with western data were performed, and it indicated that there was significant different between our results and the data for western population published. This study may provide important reference in designing proper gender- and region- prosthesis for southern Chinese population.
{"title":"Morphological study of acetabulum on 3D model reconstructed from CT scan images for the southern Chinese population","authors":"L. N. Zhang, X. Ye, Z. B. Xu, Y. W. Du, Z. Hou, X. Bai, P. Shang","doi":"10.1109/ICIST.2014.6920508","DOIUrl":"https://doi.org/10.1109/ICIST.2014.6920508","url":null,"abstract":"To obtain the morphological measurements of acetabulum for southern Chinese population, 40 volunteers were evaluated by CT scan. The 3D model of pelvis was reconstructed from CT scan images. The AVA, ABA and SID were measured for both sides. The mean AVA, ABA showed no significant difference for sex and both sides. But the SID showed the opposite results. The comparison of these parameters with western data were performed, and it indicated that there was significant different between our results and the data for western population published. This study may provide important reference in designing proper gender- and region- prosthesis for southern Chinese population.","PeriodicalId":306383,"journal":{"name":"2014 4th IEEE International Conference on Information Science and Technology","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127379776","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 : 2014-04-26DOI: 10.1109/ICIST.2014.6920542
Shun Li, Yim-Pan Chui, P. Heng
Drilling of bone, which is an essential part in temporal bone surgeries, is applied for making a tiny surgical entrance(incision) to the target. Because the temporal bone has a remarkable complex anatomy structures responsible for hearing and balance, VR (virtual reality)-based simulator is desirable for the trainee to interactively localize and operate on the target in a virtual space. In the surgical process, vast heat is generated while the drill bit cuts the bone tissue. For the human body, the tolerance of the bone tissue to the temperature is limited and a persistently high temperature may possibly result in thermal necrosis. In this paper, we have proposed a framework to evaluate the thermal damage to bone tissue during the bone drilling process. Heat generation and conduction were both modelled physically in our framework. The profile of temperature distribution in the bone tissue was used to determine the region of thermal necrosis which is treated as one of the metrics to assess the quality of the virtual surgical case.
{"title":"Simulation of thermal damage to bone tissue during bone drilling","authors":"Shun Li, Yim-Pan Chui, P. Heng","doi":"10.1109/ICIST.2014.6920542","DOIUrl":"https://doi.org/10.1109/ICIST.2014.6920542","url":null,"abstract":"Drilling of bone, which is an essential part in temporal bone surgeries, is applied for making a tiny surgical entrance(incision) to the target. Because the temporal bone has a remarkable complex anatomy structures responsible for hearing and balance, VR (virtual reality)-based simulator is desirable for the trainee to interactively localize and operate on the target in a virtual space. In the surgical process, vast heat is generated while the drill bit cuts the bone tissue. For the human body, the tolerance of the bone tissue to the temperature is limited and a persistently high temperature may possibly result in thermal necrosis. In this paper, we have proposed a framework to evaluate the thermal damage to bone tissue during the bone drilling process. Heat generation and conduction were both modelled physically in our framework. The profile of temperature distribution in the bone tissue was used to determine the region of thermal necrosis which is treated as one of the metrics to assess the quality of the virtual surgical case.","PeriodicalId":306383,"journal":{"name":"2014 4th IEEE International Conference on Information Science and Technology","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123925020","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 : 2014-04-26DOI: 10.1109/ICIST.2014.6920392
Quanlong Feng, J. Gong
Due to differences of each detector's response to the same radiant signal, stripe noise exists in various remotely sensed data, which degrades accuracy of the imagery and brings difficulty in subsequent analysis such as quantitative inversion, terrain classification and object detection. Wavelet shrinkage denoising algorithm can remove the stripe effectively because it suppresses the noise through hard or soft thresholding function. However, the main defect lies in blurred edges of ground objects since it always over reduces the wavelet coefficients. In order to preserve and restore the edges to the full extent, this paper adopted anisotropic diffusion method into wavelet domain. An anisotropic diffusion filtering process was applied to the high frequency wavelet coefficients which eradicated the stripe while preserving the ground object edges. Experimental results showed that the proposed method in this paper outperformed the traditional wavelet shrinkage denoising method both in visual effects and several image quality indexes.
{"title":"Destriping remotely sensed data using anisotropic diffusion in wavelet domain","authors":"Quanlong Feng, J. Gong","doi":"10.1109/ICIST.2014.6920392","DOIUrl":"https://doi.org/10.1109/ICIST.2014.6920392","url":null,"abstract":"Due to differences of each detector's response to the same radiant signal, stripe noise exists in various remotely sensed data, which degrades accuracy of the imagery and brings difficulty in subsequent analysis such as quantitative inversion, terrain classification and object detection. Wavelet shrinkage denoising algorithm can remove the stripe effectively because it suppresses the noise through hard or soft thresholding function. However, the main defect lies in blurred edges of ground objects since it always over reduces the wavelet coefficients. In order to preserve and restore the edges to the full extent, this paper adopted anisotropic diffusion method into wavelet domain. An anisotropic diffusion filtering process was applied to the high frequency wavelet coefficients which eradicated the stripe while preserving the ground object edges. Experimental results showed that the proposed method in this paper outperformed the traditional wavelet shrinkage denoising method both in visual effects and several image quality indexes.","PeriodicalId":306383,"journal":{"name":"2014 4th IEEE International Conference on Information Science and Technology","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128656567","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 : 2014-04-26DOI: 10.1109/ICIST.2014.6920603
Zhiyu Li, Yi Zhan
The Stochastic Nelder-Mead, a recently developed variant of the classic Nelder-Mead algorithm, is a direct search method for derivative-free, nonlinear and black-box stochastic optimization problem. A key factor that influences its performance is obtaining reasonable rankings on the simplex points with random noise. We propose a new ranking procedure that integrates a selection sorting algorithm with statistical hypothesis testing method. This procedure provides an efficient `fine-granular' re-sampling scheme in which the sample sizes can be estimated more precisely and with more flexibility. A numerical study indicates that the revised algorithm can generally outperform its original in terms of both accuracy and stability.
{"title":"A revised stochastic nelder-mead algorithm for numerical optimization","authors":"Zhiyu Li, Yi Zhan","doi":"10.1109/ICIST.2014.6920603","DOIUrl":"https://doi.org/10.1109/ICIST.2014.6920603","url":null,"abstract":"The Stochastic Nelder-Mead, a recently developed variant of the classic Nelder-Mead algorithm, is a direct search method for derivative-free, nonlinear and black-box stochastic optimization problem. A key factor that influences its performance is obtaining reasonable rankings on the simplex points with random noise. We propose a new ranking procedure that integrates a selection sorting algorithm with statistical hypothesis testing method. This procedure provides an efficient `fine-granular' re-sampling scheme in which the sample sizes can be estimated more precisely and with more flexibility. A numerical study indicates that the revised algorithm can generally outperform its original in terms of both accuracy and stability.","PeriodicalId":306383,"journal":{"name":"2014 4th IEEE International Conference on Information Science and Technology","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129242261","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 : 2014-04-26DOI: 10.1109/ICIST.2014.6920560
Z. Zhou, H. Fang, K. He, Y. Gu, C. Luo, Ya Miao
For the increasing demand of jewelry products, a self-designed multi-axis jewellery lathe is developed, which uses a PC control system based on VC and motion control card. In the process of development of the open CNC control system software, the unconventional ellipse curve and ellipsoidal helix interpolation besides the conventional line and circle interpolation should also be used during the CNC machining process. This paper specially studies the two interpolation algorithms based on the spacial structure of the lathe, and the achievements of the study has been put into practice.
{"title":"Study of ellipse curve and ellipsoidal helix interpolation algorithm for multi-axis jewelry lathe","authors":"Z. Zhou, H. Fang, K. He, Y. Gu, C. Luo, Ya Miao","doi":"10.1109/ICIST.2014.6920560","DOIUrl":"https://doi.org/10.1109/ICIST.2014.6920560","url":null,"abstract":"For the increasing demand of jewelry products, a self-designed multi-axis jewellery lathe is developed, which uses a PC control system based on VC and motion control card. In the process of development of the open CNC control system software, the unconventional ellipse curve and ellipsoidal helix interpolation besides the conventional line and circle interpolation should also be used during the CNC machining process. This paper specially studies the two interpolation algorithms based on the spacial structure of the lathe, and the achievements of the study has been put into practice.","PeriodicalId":306383,"journal":{"name":"2014 4th IEEE International Conference on Information Science and Technology","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116769799","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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