检索结果-内蒙古大学图书馆

Artificial Intelligence, Blockchain, and Internet of Things (AIBThings), IEEE International Conference on

作者： Tamador Mohaidat Md Rahat Kader Khan Kasem Khalil Department of Electrical and Computer Engineering University of Mississippi Mississippi USA

ISBN: (数字)9798331529529

ISBN: (纸本)9798331529536

Artificial neural networks (ANNs) rely significantly on activation functions for optimal performance. Traditional activation functions such as ReLU and Sigmoid are commonly used. However, they have computational and hardware efficiency constraints. This work presents a unique piecewise linear (PWL) approximation approach for the Gaussian Error linear Unit (GELU) activation function that uses curvature values. We split the GELU function into pieces based on curvature values and then used the minimal squares approach to figure out each segment’s PWL approximation function equations. To determine the most appropriate function expression with a specified number of segments, we employ an optimization technique that minimizes both maximum and average absolute errors. This demonstrates that the PWL approximation of the GELU function accurately converges to the original function as the piecewise points’ number increases. The proposed method is intended to improve hardware efficiency while maintaining high accuracy. EExperimental findings indicate that the PWL approximation of GELU obtains $\mathbf{9 7. 9 6 \%}$ accuracy on the MNIST dataset. This method offers a promising alternative for improving the performance and efficiency of ANN activation algorithms in hardware applications.

关键词： Accuracy piecewise linear approximation linear approximation Artificial neural networks Performance gain Market research Hardware Computational efficiency Resource management Optimization

来源：评论

学校读者我要写书评

暂无评论

A Generic Storage Model Based on a Future Cost piecewise-linear approximation

引用

IEEE TRANSACTIONS ON SMART GRID 2019年第1期10卷 878-888页

作者： Alvarez, Manuel Ronnberg, Sarah K. Bermudez, Juan Zhong, Jin Bollen, Math H. J. Lulea Univ Technol Dept Engn Sci & Math S-93187 Skelleftea Sweden Univ Simon Bolivar Dept Energy Convers & Transport Caracas 01080 Venezuela Univ Hong Kong Dept Elect & Elect Engn Hong Kong Peoples R China

This paper presents a generic storage model (GSM) inspired by the scheduling of hydraulic reservoirs. The model for steady state short-term operational studies interlaces with the long-term (LT) energy scheduling through a piecewise-linear future cost function (FCF). Under the assumption that a stochastic dual dynamic programming approach has been used to solve the energy schedule for the LT, the FCF output from that study will be processed to obtain an equivalent marginal opportunity cost for the storage unit. The linear characteristic of a segment of the FCF will allow a linear modeling of the storage unit production cost. This formulation will help to coordinate the renewable resource along with storage facilities in order to find the optimal operation cost while meeting end-point conditions for the LT plan of the energy storage. The generic model will be implemented to represent a battery storage and a pumped-hydro storage. A stochastic unit commitment with the GSM will be formulated and tested to assess the day-ahead scheduling strategy of a virtual power plant facing uncertainties from production, consumption, and market prices.

关键词： Energy storage piecewise linear approximation optimal scheduling uncertainty

来源：评论

学校读者我要写书评

暂无评论

Constrained piecewise linear approximation of digital curves

Constrained piecewise linear approximation of digital curves

引用

International Conference on Pattern Recognition

作者： Alexander Kolesnikov Department of Computer Science and Statistics University of Joensuu Finland

We have considered a problem of continuous piecewise linear approximation of the digital curves with a minimum number of the line segments. Fast sub-optimal algorithm for constrained piecewise linear approximation is suggested to construct continuous piecewise linear representation of the input curve for a given error bound. The proposed fast sub-optimal algorithm can be used in combination with reduced-search dynamic programming algorithm to get a practically optimal solution in a few iterations. The proposed algorithms have demonstrated both high efficiency and time performance.

关键词： piecewise linear approximation approximation error Dynamic programming approximation algorithms Heuristic algorithms Computer science Statistics piecewise linear techniques Lagrangian functions Image analysis

来源：评论

学校读者我要写书评

暂无评论

General function evaluation in a STPC setting via piecewise linear approximation

General function evaluation in a STPC setting via piecewise ...

引用

IEEE International Workshop on Information Forensics and Security (WIFS)

作者： Tommaso Pignata Riccardo Lazzeretti Mauro Barni Information Engineering Department University of Siena Italy

While in theory any computable functions can be evaluated in a Secure Two Party Computation (STPC) framework, practical applications are often limited for complexity reasons and by the kind of operations that the available cryptographic tools permit. In this paper we propose an algorithm that, given a function f() and an interval belonging to its domain, produces a piecewise linear approximation f() that can be easily implemented in a STPC setting. Two different implementations are proposed: the first one relies completely on Garbled Circuit (GC) theory, while the second one exploits a hybrid construction where GC and Homomorphic Encryption (HE) are used together. We show that from a communication complexity perspective the full-GC implementation is preferable when the input and output variables are represented with a small number of bits, otherwise the hybrid solution is preferable.

关键词： Protocols Logic gates Cryptography approximation methods Helium piecewise linear approximation

来源：评论

学校读者我要写书评

暂无评论

引用

International Conference on Wireless Communications and Signal Processing (WCSP)

作者： Guiling Li Yuanzhen Wang Liping Zhang Xiaolian Zhu College of Computer Science and Technology Huazhong University of Science and Technology Wuhan China School of Computer and Science China University of Geoscience Wuhan China

Time series data have attracted much research recently. Among many valuable research topics, similarity measure is very important. The choice of similarity measure can affect the result of data mining tasks. piecewise linear approximation is a kind of dimensionality reduction technique, based on piecewise linear approximation, we introduce two similarity measures for time series, which satisfy four properties of metric. We use the measures in similarity search problem, experiments on real data show their effectiveness.

关键词： Time measurement piecewise linear approximation Data mining Search problems piecewise linear techniques Educational institutions Computer science Geology Euclidean distance Speech processing

来源：评论

学校读者我要写书评

暂无评论

QRS complex duration variability assessment using Dynamic Time Warping and piecewise linear approximation

QRS complex duration variability assessment using Dynamic Ti...

引用

Pan American Health Care Exchanges, PAHCE

作者： R López-Avitia M A Reyna-Carranza L A Cetto M E Bravo-Zanoguera H G Arriola-Zorrilla Universidad Autónoma de Baja California Mexicali BC México The Math Works Inc Natick MA USA

The Signal Averaged Electrocardiography (SAECG) is a widely used technique to improve Signal to Noise Ratio (SNR) in ECG records, taken in account that these records are quasi-steady. Sometimes patient's physiology may alter those quasi-steady characteristics in heartbeats that are assumed in the averaging. This paper evaluates the QRS complex duration (QRS d ) as a parameter for measuring heartbeat-alignment, using both Derivative Dynamic Time Warping (DDTW) and piecewise linear approximation (PLA). Results show that using those algorithms it is possible to reach acceptable SNR, significant QRS d variability reduction, and a decrease of the heartbeat number needed for the averaging.

关键词： piecewise linear approximation Heart rate variability Electrocardiography Dynamic programming Signal processing algorithms Signal to noise ratio Programmable logic arrays Signal resolution Signal processing Speech recognition

来源：评论

学校读者我要写书评

暂无评论

A perceptual rate-distortion optimization approach based on piecewise linear approximation for video coding

A perceptual rate-distortion optimization approach based on ...

引用

IEEE International Conference on Multimedia and Expo Workshops (ICMEW)

作者： Zheng Yuan Dongqing Zhang Dapeng Wu Heather Yu Department of ECE University of Florida USA Huawei Technologies Company Limited USA

ISBN: (纸本)9781479916030

The core question in Perceptual Rate Distortion Optimization is how to find the Lagrange multiplier λ, which essentially requires the construction of a perceptual quality based RD model. A compelling RD modeling expects that the model reflects the best achievable Rate Distortion trade-off and captures the RD behavior with high accuracy. To this end, we rescale the λ associated with MSE-RDO to match the dynamic range of the perceptual distortion and populate a family of RD samples from Perceptual-RDO with its Lagrange multiplier as offsetting the rescaled λ. Considering that the envelope curve that encloses all the RD samples depicts the best achievable RD bound, we propose a piecewise linear approximation approach (since there is no guarantee that the RD model can be accurately fitted by a single function e.g. D = ae bR , D = aR b ) to represent it. Each segment in the piecewise line is obtained with fair computational complexity: fitting the RD samples given the same QP with circle curve and finding the common tangent line over two adjacent circle curves. Experiments show that our proposed approach can reduce bitrate by 2-5% given the same perceptual distortion than the conventional approach.

关键词： Encoding Bit rate Rate-distortion approximation methods Optimization piecewise linear approximation

来源：评论

学校读者我要写书评

暂无评论

Performance analysis of companding quantizer using piecewise linear approximation of the Gaussian source

Performance analysis of companding quantizer using piecewise...

引用

International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Service (TELSIKS)

作者： Zoran H. Peric Nikola Simic Aleksandra Jovanovic Milan S. Savic Faculty of Electronic Engineering University of Nis Nis Serbia

In this paper a piecewise-linear approximation of a probability density function is performed. For approximated probability density function an optimal compressor function is determined. Based on compressor function determined in this way, companding scalar quantizer is designed. Performance analysis is performed for the Gaussian source at the entrance of the quantizer. Obtained results show that the proposed model has performance very close to that of the optimal nonlinear compandor. Furthermore, practical implementation of proposed model does not require integral equations solving. Consequently, the proposed model is much more suitable for implementation.

关键词： Probability density function Function approximation piecewise linear approximation Distortion linear approximation Mathematical model

来源：评论

学校读者我要写书评

暂无评论

Nonlinear Acoustic Echo Cancellation Based on piecewise linear approximation with Amplitude Threshold Decomposition

Nonlinear Acoustic Echo Cancellation Based on Piecewise Line...

引用

IWAENC 2012;International Workshop on Acoustic Signal Enhancement

作者： Suehiro Shimauchi Yoichi Haneda NTT Media Intelligence Laboratories NTT Corporation

We propose a new nonlinear acoustic echo cancellation scheme for the cascade echo path model of memoryless nonlinearity and linear filter. The scheme has two features. First, a class of piecewise linear (PWL) approximation based on amplitude threshold decomposition is applied to the memoryless nonlinearity. Unlike other PWL classes conventionally used for this problem, the threshold decomposition-based PWL class enables more intuitive implementation with a compact parameter set. The second is a new joint adaptive algorithm, which is normalized by taking into account the difference in the numbers of the nonlinear and linear model parameters. The simulation results show that the proposed scheme more stably cancels the nonlinear echo than the conventional cascade scheme, even when the numbers of parameters are changed. Index Terms - Nonlinear acoustic echo cancellation, memoryless nonlinearity, piecewise linear approximation, adaptive filtering, normalized LMS.

关键词： Joints Echo cancellers Nonlinear acoustics piecewise linear approximation Adaptation models Vectors approximation methods

来源：评论

学校读者我要写书评

暂无评论

Look-up table and breakpoints determination for piecewise linear approximation functions using evolutionary computation

Look-up table and breakpoints determination for piecewise li...

引用

IEEE Instrumentation and Measurement Technology Conference

作者： S.Y.C. Catunda O.R. Saavedra J.V. FonsecaNeto M.R.A. Morais DEE Universidade Federal do Maranhao Sao Luis Maranhao Brazil DEE Universidade Federal da Paraiba Campina Grande Paraiba Brazil

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：