发布求助
文献互助 智能选刊 最新文献

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

筛选
英文 中文
Generalized Normalized Gradient Descent Algorithm with Direct Update of the Step-Size Parameter 步长参数直接更新的广义归一化梯度下降算法
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292681
C. Paleologu, C. Vladeanu, S. Ciochină, A. Enescu
{"title":"Generalized Normalized Gradient Descent Algorithm with Direct Update of the Step-Size Parameter","authors":"C. Paleologu, C. Vladeanu, S. Ciochină, A. Enescu","doi":"10.1109/ISSCS.2007.4292681","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292681","url":null,"abstract":"A modified generalized normalized gradient descent (GNGD) adaptive algorithm is proposed. The original GNGD algorithm requires an indirect procedure for the computation of the step-size parameter, leading to an increased computational complexity. The proposed algorithm uses a direct update formula for this parameter, which further reduces the computational demands. Simulations in the context of echo cancellation prove the equivalency of the algorithms in terms of performances and improvements over normalized least mean square (NLMS) algorithm.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"42 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":"122982727","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: 1
A Simulation Framework for Time-Of-Flight Sensors 一种飞行时间传感器仿真框架
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292667
M. Keller, J. Orthmann, A. Kolb, V. Peters
{"title":"A Simulation Framework for Time-Of-Flight Sensors","authors":"M. Keller, J. Orthmann, A. Kolb, V. Peters","doi":"10.1109/ISSCS.2007.4292667","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292667","url":null,"abstract":"Modern time-of-flight (TOF) cameras enable the measurement of full-range distance information in real time. The distance information can be calculated by estimating the elapsed time between the emission and the receiving of active light. The simulation of sensors is an essential building block for hardware design and application development. Thus, expensive prototypes can be omitted and down-stream algorithms, e.g. for sensor calibration and sensor data processing, can be tested. This paper deals with the simulation of camera-like time-of-flight sensors and focuses particularly on the manipulation of camera parameters and the generation of synthetic sensor data in real-time. The sensor framework provides tools for object and camera manipulation as well as animation. All relevant parameters for the camera-like sensor, object appearance and per-pixel sensor information are available to the TOF-sensor simulation unit (SSU), which realizes the specific sensor characteristics. Moreover, we present a first concept of the simulation of photonic mixing device (PMD) sensors. The framework is hardware accelerated to allow for interactive simulator feedback, making use of the programmability of modern graphics processing units (GPUs), i.e., of vertex and fragment programs.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"174 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":"122999619","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: 27
Order Reduction by Explicit Moment Matching Based on State Variable Approach 基于状态变量的显式矩匹配降阶方法
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292774
L. Dumitriu, M. Iordache
{"title":"Order Reduction by Explicit Moment Matching Based on State Variable Approach","authors":"L. Dumitriu, M. Iordache","doi":"10.1109/ISSCS.2007.4292774","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292774","url":null,"abstract":"The paper presents a sistematic procedure for order reduction needed in an efficient analog large-scale circuit simulation. The procedure uses a reduced number of the original circuit moments to obtain an accurate approximation of the circuit function corresponding to an equivalent reduced-size circuit. An efficient program for state equation formulation and transfer function generation allow the computation of the original circuit moments. Some examples are done to illustrate the method.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"97 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":"117319105","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: 1
On the Feature Extraction Performances of Recursive Gabor-Type Filters in Texture Recognition Applications 递归gabor型滤波器在纹理识别中的特征提取性能研究
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292760
E. David, P. Ungureanu
{"title":"On the Feature Extraction Performances of Recursive Gabor-Type Filters in Texture Recognition Applications","authors":"E. David, P. Ungureanu","doi":"10.1109/ISSCS.2007.4292760","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292760","url":null,"abstract":"This paper presents several results regarding the performance of feature extraction using IIR Gabor type filters banks in a texture recognition application context. These performances are studied considering different filtering schemes and filter banks parameters and compared with similar results from literature.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"24 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":"129766413","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: 1
LC-Ladder Filters Emulated by Circuits with Current Controlled Conveyors and Grounded Capacitors 用电流控制传送带和接地电容电路模拟lc -梯形滤波器
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292777
A. Campeanu, J. Gal
{"title":"LC-Ladder Filters Emulated by Circuits with Current Controlled Conveyors and Grounded Capacitors","authors":"A. Campeanu, J. Gal","doi":"10.1109/ISSCS.2007.4292777","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292777","url":null,"abstract":"The paper implements the well-known leapfrog method of LC-ladder filters simulation by circuits employing only multiple outputs second-generation current controlled conveyors (MO-CCCII) and grounded capacitors. The proposed method is general, because on a hand it implements any type of frequency response and on the other side both all pole and finite-transmission-zeros passive filters are emulated. Using current controlled devices, the circuits are electronically tunable and do not require any matching constraints, making the approach extremely convenient for systematic design and dense layout. SPICE simulations made with circuits employing bipolar MO-CCCII demonstrate the validity of the approach.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"15 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":"129142370","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: 4
High Frequency Implementation of Sprott's Chaotic Oscillators Using Current-Feedback Op Amps 利用电流反馈运算放大器高频实现斯普罗特混沌振荡器
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292660
B. Srisuchinwong, Chun-Hung Liou
{"title":"High Frequency Implementation of Sprott's Chaotic Oscillators Using Current-Feedback Op Amps","authors":"B. Srisuchinwong, Chun-Hung Liou","doi":"10.1109/ISSCS.2007.4292660","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292660","url":null,"abstract":"High frequency implementation of Sprott's chaotic oscillators based on current-feedback op amps (CFOAs) is proposed. A Sprott's jerk function and four different types of nonlinear components are implemented using the attractively high-frequency features of the CFOAs operating in both voltage and current modes. Four trajectories of the chaotic attractors are demonstrated. The chaotic spectrums are easily scaled and extended to higher frequencies by a factor of 277 to 380.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"25 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":"121387557","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: 8
Applications of the Iterated Conditional Modes Algorithm for Motion Estimation in Medical Image Sequences 迭代条件模式算法在医学图像序列运动估计中的应用
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292740
C. Grava, A. Gacsádi, C. Gordan, A. Grava, I. Gavriluț
{"title":"Applications of the Iterated Conditional Modes Algorithm for Motion Estimation in Medical Image Sequences","authors":"C. Grava, A. Gacsádi, C. Gordan, A. Grava, I. Gavriluț","doi":"10.1109/ISSCS.2007.4292740","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292740","url":null,"abstract":"This paper presents a deterministic algorithm for motion estimation in medical image sequences. We are describing the iterated conditional modes (ICM) algorithm adapted to solve the motion estimation problem in medical image sequences. The proposed algorithm ensures a trade-off between precision and computational time that is a good efficiency when compared to the stochastic algorithms. The results are compared in terms of precision and of computational time with those of other basic algorithms such as the basic block-matching algorithm or the Horn & Schunck algorithm. The results are illustrated on CT (computer tomography) and MRI (magnetically resonance imaging) medical image sequences.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"102 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":"114713153","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: 1
Classification of Sharp-Edged Objects Using Morphology Toolbox 使用形态学工具箱对锋利边缘物体进行分类
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292786
E. Zaharescu
{"title":"Classification of Sharp-Edged Objects Using Morphology Toolbox","authors":"E. Zaharescu","doi":"10.1109/ISSCS.2007.4292786","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292786","url":null,"abstract":"A mathematical morphology based approach for automated classification of sharp-edged objects is explored in this paper. Using an adapted set of mathematical morphology operators, the initial color images are analyzed until final color classification is accomplished. Morphological feature extraction algorithm included morphological color gradient, homotopic skeleton, Hit-or-Miss transform and other special morphological processing steps. In the end, illustrative application examples of the presented approach on real acquired images are also provided.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"1 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":"126494379","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
An Integratable Chaotic Oscillator with Current Amplifiers 带电流放大器的可积混沌振荡器
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292661
K. Giannakopoulos, G. Souliotis, N. Fragoulis
{"title":"An Integratable Chaotic Oscillator with Current Amplifiers","authors":"K. Giannakopoulos, G. Souliotis, N. Fragoulis","doi":"10.1109/ISSCS.2007.4292661","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292661","url":null,"abstract":"A current-mode chaotic oscillator based on current amplifiers is studied. The oscillator operates on high frequencies and is suitable for on chip implementation. Its chaotic behavior is controlled by means of a bias voltage. Various methods for detecting chaos, such as the Lyapunov exponents, the Lyapunov dimension, the spectrum and the phase portraits are used, in order to confirm the chaotic behavior of the circuit. Simulation results, using a typical 0.35 mum CMOS technology, fully coincide with theoretical results.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"R-34 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":"126539318","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
Bridgeless Power Factor Correction Converter Working at High Load Variations 工作在高负载变化下的无桥功率因数校正变换器
2007 International Symposium on Signals, Circuits and Systems Pub Date : 2007-07-13 DOI: 10.1109/ISSCS.2007.4292802
C. Petrea, M. Lucanu
{"title":"Bridgeless Power Factor Correction Converter Working at High Load Variations","authors":"C. Petrea, M. Lucanu","doi":"10.1109/ISSCS.2007.4292802","DOIUrl":"https://doi.org/10.1109/ISSCS.2007.4292802","url":null,"abstract":"The conventional boost power factor correction converter has high conduction losses because of the input rectifier. The use of a bridgeless PFC circuit offers high efficiency. For high powers, the bridgeless circuit will be designed to work in continuous conduction mode (CCM), using an average current mode control. The switches have parasitic capacitances that in CCM lead to switch losses, without influencing the waveform of the converters. For low loads, the discontinuous conduction mode (DCM) appears, but the parasitic capacitances lead to the input current distorsion. This paper focuses on the simulation and analysis of bridgeless PFC converter working at high load and low load and possible solutions to eliminate the distortion of the current working at low power.","PeriodicalId":225101,"journal":{"name":"2007 International Symposium on Signals, Circuits and Systems","volume":"24 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":"132012162","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: 28
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信