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2007 International Symposium on Signals, Circuits and Systems最新文献

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Mathematical Model for Induction Machine Drives with Modified PWM 修正PWM感应电机驱动的数学模型
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292750
D. Neacşu
{"title":"Mathematical Model for Induction Machine Drives with Modified PWM","authors":"D. Neacşu","doi":"10.1109/ISSCS.2007.4292750","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292750","url":null,"abstract":"This paper provides a comprehensive mathematical model for an innovative PWM algorithm able to improve the dynamic performance of low-cost induction machine drives through a special control of the switches during the zero-state. This special sequence produces a voltage larger than usual on the load during transients helping the transfer of reactive energy. This idea is extremely simple to implement and provides outstanding results.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125276661","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}
引用次数: 0
Aperture Couplings in Multilayer Filtering Structures 多层滤波结构中的孔径耦合
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292775
N. Militaru, G. Lojewski, M. Banciu
{"title":"Aperture Couplings in Multilayer Filtering Structures","authors":"N. Militaru, G. Lojewski, M. Banciu","doi":"10.1109/ISSCS.2007.4292775","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292775","url":null,"abstract":"In multilayer structures apertures in metallic sheets can be used as coupling elements between resonators located on different layers, allowing very compact filter designs. In this paper, some novel types of planar microwave bandpass filters, using aperture couplings, in structures with three metallic layers, are considered. Couplings between two miniaturized resonators are investigated, by full electromagnetic field simulation. Based on the results of this study, several models of planar microwave bandpass filters, with a single or with two apertures, are designed, verified by simulation, fabricated and measured. Compared to the classical filters, these novel structures show a good compactness and can offer some technological advantages.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121735257","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}
引用次数: 9
Improving Face Detection with TOF Cameras 改进TOF相机的人脸检测
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292692
D.W. Hansen, R. Larsen, F. Lauze
{"title":"Improving Face Detection with TOF Cameras","authors":"D.W. Hansen, R. Larsen, F. Lauze","doi":"10.1109/ISSCS.2007.4292692","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292692","url":null,"abstract":"A face detection method based on a boosted classifier using images from a time-of-flight sensor is presented. We show that the performance of face detection can be improved when using both depth and gray scale images and that the common use of integration of hypotheses for verification can be relaxed. Based on the detected face we employ an active contour method on depth images for full head segmentation.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116789842","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}
引用次数: 21
A Quantitative Evaluation of the Hip Prosthesis Segmentation Quality in X-Ray Images 人工髋关节x射线图像分割质量的定量评价
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292685
A. Oprea, C. Vertan
{"title":"A Quantitative Evaluation of the Hip Prosthesis Segmentation Quality in X-Ray Images","authors":"A. Oprea, C. Vertan","doi":"10.1109/ISSCS.2007.4292685","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292685","url":null,"abstract":"X-ray film images are the main medical diagnosis tool in the evaluation of the fit of the hip prostheses inserted in total hip arthroplasty (THA) procedures. In a computer-aided diagnosis tool, one of the most important operations is the automatic segmentation of the X-ray image into the clinical relevant parts: prosthesis, bone (femur) and soft tissue. The paper investigates the use of several classical adaptive region segmentation techniques, using either the initial pixel luminance space (adaptive histogram thresholding), or an extended feature space (fuzzy C-means) and evaluates the segmentation quality, by the standard detection error and ROC (receiver operating characteristics) curves.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"291 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123046084","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}
引用次数: 13
Optimizing resolution of signals in a low-IF receiver 低中频接收机信号分辨率的优化
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292734
S. Dwivedi, B. Amrutur, N. Bhat
{"title":"Optimizing resolution of signals in a low-IF receiver","authors":"S. Dwivedi, B. Amrutur, N. Bhat","doi":"10.1109/ISSCS.2007.4292734","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292734","url":null,"abstract":"The resolution of the digital signal path has a crucial impact on the design, performance and the power dissipation of the radio receiver data path, downstream from the ADC. The ADC quantization noise has been traditionally included with the Front End receiver noise in calculating the SNR as well as BER for the receiver. Using the IEEE 802.15.4 as an example, we show that this approach leads to an over-design for the ADC and the digital signal path, resulting in larger power. More accurate specifications for the front-end design can be obtained by making SNRreg a function of signal resolutions. We show that lower resolution signals provide adequate performance and quantization noise alone does not produce any bit-error. We find that a tight bandpass filter preceding the ADC can relax the resolution requirement and a 1-bit ADC degrades SNR by only 1.35 dB compared to 8-bit ADC. Signal resolution has a larger impact on the synchronization and a 1-bit ADC costs about 5 dB in SNR to maintain the same level of performance as a 8-bit ADC.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121996174","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}
引用次数: 3
Effective Strategy for Non-adjacent Quantum Gates Transformation in Quantum Circuits 量子电路中非相邻量子门变换的有效策略
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292695
Shengchao Ding, Zhi‐Xiang Jin, Qing Yang
{"title":"Effective Strategy for Non-adjacent Quantum Gates Transformation in Quantum Circuits","authors":"Shengchao Ding, Zhi‐Xiang Jin, Qing Yang","doi":"10.1109/ISSCS.2007.4292695","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292695","url":null,"abstract":"This paper proposes an approach to transform a quantum circuit which contains non-adjacent two-qubit gates to an efficient equivalent containing only the adjacent two-qubit gates. We show how to reduce the problem of transforming the quantum circuits into the problem of finding the shortest path in a layered directed acyclic graph. However, the available algorithms to find the shortest path are not efficient enough to solve this problem. Thus, a heuristic algorithm with the runtime of O(mn2) is proposed. Extensive simulations show that the algorithm is efficient and effective enough to find the shortest path, although it does not always guarantee the optimal solution.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122473406","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}
引用次数: 0
Microstepping Mode for Stepper Motor Control 步进电机控制的微步进方式
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292799
G. Băluţă
{"title":"Microstepping Mode for Stepper Motor Control","authors":"G. Băluţă","doi":"10.1109/ISSCS.2007.4292799","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292799","url":null,"abstract":"The paper presents a high performance system for stepper motor control in a microstepping mode, which was designed and performed with a L292 specialized integrated circuits, made by SGS-THOMSON, Microelectronics Company. The microstepping control system improves the positioning accuracy and eliminates low speed ripple and resonance effects in a stepper motor electrical drive.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"456 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125796855","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}
引用次数: 47
Movement Artefacts in Range Images of Time-of-Flight Cameras 飞行时间相机距离图像中的运动伪影
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292665
Oliver Lottner, A. Sluiter, Klaus Hartmann, Wolfgang Weihs
{"title":"Movement Artefacts in Range Images of Time-of-Flight Cameras","authors":"Oliver Lottner, A. Sluiter, Klaus Hartmann, Wolfgang Weihs","doi":"10.1109/ISSCS.2007.4292665","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292665","url":null,"abstract":"Modern time-of-flight measuring camera systems are able to provide accurate depth images but there are problems with regard to their usage in a dynamic environment due to their measurement principle. The Centre for Sensor Systems recently proposed a new 2D/3D camera avoiding this drawback by the monocular combination of a 2D and a 3D sensor. In this paper, the camera is presented and an approach for detecting erroneous depth values due to movement is made.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127136033","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}
引用次数: 46
On the Construction of Diagonal Lyapunov Functions for Linear Systems 线性系统对角Lyapunov函数的构造
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292773
O. Pastravanu, M. Matcovschi
{"title":"On the Construction of Diagonal Lyapunov Functions for Linear Systems","authors":"O. Pastravanu, M. Matcovschi","doi":"10.1109/ISSCS.2007.4292773","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292773","url":null,"abstract":"The paper generalizes the concept of diagonal-type Lyapunov functions for arbitrary Holder vector p-norms, 1lesplesinfin. For p=2 this is equivalent with the usual quadratic form V(x)=xTDeltax, where Delta is a positive definite diagonal matrix, x is a real vector, and T denotes transposition. We provide concrete expressions for the Lyapunov function candidates that allow testing if a discrete-or continuous time system is asymptotically stable or not. These concrete expressions are constructed from the Perron or Perron-Frobenius eigenvectors of some matrices which either describe the system dynamics or majored the matrices defining the dynamics.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125224273","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}
引用次数: 3
A New Wide input-range FGMOS based Four quadrant Multiplier with Electrical Error Correction 一种新型宽输入范围FGMOS四象限乘法器
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292674
B. Ramasubramanian
{"title":"A New Wide input-range FGMOS based Four quadrant Multiplier with Electrical Error Correction","authors":"B. Ramasubramanian","doi":"10.1109/ISSCS.2007.4292674","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292674","url":null,"abstract":"Analog four-quadrant multipliers suffer from errors in the output owing to various factors including process, temperature and bias conditions. In most cases, little can be done to avoid these errors. This paper introduces a new analog four quadrant multiplier that employs the weighted summing capability of the Floating Gate MOSFET (FGMOS). The circuit features a wide input range that exceeds the power supplies (about 240% of the supply), and a novel Electrical Error correction technique. In addition, it has a reasonably high bandwidth (about 32MHz), low Total Harmonic Distortion (THD=0.712%) and high input Dynamic range (130dB).","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132628691","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}
引用次数: 7
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