检索结果-内蒙古大学图书馆

2010 The 3rd International Conference on Computational Intelligence and Industrial Application (PACIIA2010)

作者： Zhang Xiao-hong School of Information Engineering Jiangxi University of Science and Technology Ganzhou, 314000, China Liu Gang School of Information Engineering Jiangxi University of Science and Technology Ganzhou, 341000, China

Image compression is a compression coding technology used in digital image. It is applied to reduce redundant information in image data, thus making unit storage and ring data transfer more efficient. interpolation algorithm is commonly used in image scaling for pixel processing, as to reduce the image distortion and blur. Considering the wavelet transform and wavelet transform coding ideas, a kind of wavelet transform and bilinear interpolation for image matching is presented. Combined with the SPIHT (Set Partitioning In Hierarchical Tree) coding scheme. Large number of experiments show that comparision with the original SPIHT algorithm, the new scheme has more prominent advantages in the peak signal to noise ratio, meansquare deviation and histogram. So this method can improve the effect of recovery image compression efficiently. With generality and flexibility, it is also suitable to process various formats and size of image.

关键词： image compression interpolation algorithm wavelet transform mixing ratio lifting wavelet

来源：评论

学校读者我要写书评

暂无评论

Implementation of an adaptive feed speed 3D NURBS interpolation algorithm

引用

中国高等学校学术文摘·机械工程 2006年第4期1卷 403-408页

作者： LIANG Hong-bin WANG Yong-zhang LI Xia College of Mechanical and Electrical Engineering Harbin Engineering UniversityHarbin 150001China College of Mechanical Engineering & Automation University of Science and TechnologyLiaoningAnshan 114044China Department of Mechanical Engineering and Automation Harbin Institute of TechnologyHarbin 150001China College of Mechanical and Electrical Engineering Harbin Engineering UniversityHarbin 150001China

NURBS (non-uniform rational B-spline) interpolation algorithms have been provided in modern CNC(computer numerical control) ***,most of them focus on a constant feed speed without considering the contour *** order to deal with this problem,an adaptive feed speed interpolation algorithm for 3D NURBS parametric curves with confined chord errors is *** the instantaneous radius of the curvature is small enough,the proposed interpolation algorithm automatically reduces the feed speed to meet the specified chord *** the other situation it uses the second-order Taylor's expansions approximation interpolation algorithm to obtain a constant feed speed so that the contour accuracy in the CNC system is *** results were provided to verify the feasibility and precision of the proposed interpolation algorithm.

关键词： CNC (computer numerical control) interpolation algorithm NURBS (non-uniform rational B-spline) error

来源：评论

学校读者我要写书评

暂无评论

Research on Regional Spatial Variability of Soil Moisture Based on GIS

Research on Regional Spatial Variability of Soil Moisture Ba...

引用

第三届国际计算机与计算技术在农业中的应用研讨会

作者： Yongcun Fan Changli Zhang Junlong Fang Lei Tian Department of Electrical Engineering Northeast Agricultural University University of Illinois at Urbana Champaign University of Illinois at Urbana Champaign USA61801

As one of soil dynamics properties,soil moisture content is an important factor of soil fertility which counts for much to crop growth situation and scientific irrigation management.A design plan of regional spatial variation of soil moisture measurement was *** main job includes the use of differential GPS technology for each sampling points in farmland,collecting data of high-precision geo-spatial information and soil moisture in farmland resorting on measure instruments of soil moisture,communicating the data between measuring instrument and portable data analysis devices or computer with cable or wireless network based on ZigBee technology,analyzing data of experimental farmland of the topography and terrain,processing and interpolating data of soil moisture content.

关键词： regional spatial variability soil moisture measurement interpolation algorithm GIS

来源：评论

学校读者我要写书评

暂无评论

Extraction of Traffic Status Based on Spatial-Temporal Trajectory Reconstruction

Extraction of Traffic Status Based on Spatial-Temporal Traje...

引用

The Sixth Advanced Forumon Transportation of China(第六届中国交通高层论坛 AFTC'2010)

作者： Qi Wang Jianming Hu Jiajie Zhang Yi Zhang Department of Automation Tsinghua University Beijing 100084 China

Intelligent transportation system (ITS) is recognized as an important means to solve traffic problems. The most crucial way to implement ITS is real time traffic control and dynamic traffic guidance, which are all based on the acquisition of traffic status timely and accurately. This paper puts forward a prototype system of IVICS (integration of vehicle infrastructure cooperation system), which completely changes traditional traffic information collection method. In IVICS, equipped vehicles can be regarded as moving sensors on road network, which can collect local traffic parameters distributedly and transmit to road-side station. This paper also proposes traffic status extraction method, by interpolation of incomplete trajectory data of equipped vehicles, we can reconstruct spacial-temporal trajectories to estimate traffic density, average speed and travel time of certain road segment. Simulations of NGSIM dataset show that even equipped rate is very low, such method can get precise estimation of traffic status, which demonstrates the effectiveness of the above algorithm.

关键词： intelligent transportation systems IVICS NGSIM trajectory reconstruction interpolation algorithm

来源：评论

学校读者我要写书评

暂无评论

A New Precise Measurement Method on Inter-harmonics

A New Precise Measurement Method on Inter-harmonics

引用

26th IEEE International Instrumentation and Measurement Technology Conference

作者： Wu, Jing Qu, Kaifeng Zhao, Wei Beihang Univ Sch Automat Sci & Elect Engn Beijing Peoples R China Tsinghua Univ Dept Elect Engn Beijing Peoples R China

ISBN: (纸本)9781424433520

For the signal containing the inter-harmonics, if the sample number is not equal to integer times of the signal period, the spectral leakages will occur in harmonic analysis based on DFT and affect the measurement accuracy. To improve the accuracy, different from other correction methods in which the long-range leakages are reduced by windowing the signal, a new interpolation algorithm is presented to correct both the long-range leakage and the short-range leakage at one time. The simulation results and experiment results show the measurement accuracy of the presented method is very high. The new algorithm is suitable for the precise harmonic analysis.

关键词： DFT interpolation algorithm leakage accuracy

来源：评论

学校读者我要写书评

暂无评论

A Novel Robust 3D Mesh Watermarking Ensuring the Human Visual System

A Novel Robust 3D Mesh Watermarking Ensuring the Human Visua...

引用

2nd International Workshop on Knowledge Discovery Data Mining

作者： Han, Dazhi Yang, Xingqiang Zhang, Caiming Shandong Univ Sch Comp Sci & Technol Jinan 250100 Peoples R China

ISBN: (纸本)9780769535432

the main objective of 3D mesh watermarking is to maximize the watermark strength while minimizing the visual distortion. In this paper, we propose a novel 3D mesh watermarking based on the human visual system and mesh curvature. We analyze the region's mean curvature and fluctuation of curvature, and then choose the appropriate regions with high visual masking degree, in order to embed the watermark by using the interpolation algorithm. The experimental results show that the watermark is capacious, invisible and robust against various attacks.

关键词： 3D Mesh Watermark Visual Distortion curvature interpolation algorithm

来源：评论

学校读者我要写书评

暂无评论

Research on Gas Stations Automation Management System Based on Neural Network

Research on Gas Stations Automation Management System Based ...

引用

WASE International Conference on Information Engineering (ICIE 2009)

作者： Zhao Meihong Li Yun Suzhou Univ Sci & Technol Inst Elect & Informat Engn Suzhou 215011 Peoples R China Shanxi Vocat Coll Tourism Dept Comp Sci Taiyuan 030031 Peoples R China

ISBN: (纸本)9780769536798

The present main problems are that volume list of oil tank are not exact commonly and volume of oil tank can't be probed visually. Aiming at domestic gas stations' status, the gas station automation management system is established based on neural networks. This paper puts forward the method of using linear interpolation algorithm to calculate the volume of oil tank at real time. It has improved the calculating accuracy greatly and can monitor administrant at real-time to make correct judgments electronic.

关键词： Gas Station Automation Management Neural Network monitor at real-time interpolation algorithm

来源：评论

学校读者我要写书评

暂无评论

A Novel Robust 3D Mesh Watermarking Ensuring the Human Visual System

A Novel Robust 3D Mesh Watermarking Ensuring the Human Visua...

引用

2009 Second International Workshop on Knowledge Discovery and Data Mining

作者： Dazhi Han School of Computer Science and Technology,Shandong University, Jinan,China Xingqiang Yang School of Computer Science and Technology,Shandong University, Jinan,China Caiming Zhang School of Computer Science and Technology,Shandong University, Jinan,China

the main objective of 3D mesh watermarking is to maximize the watermark strength while minimizing the visual *** this paper,we propose a novel 3D mesh watermarking based on the human visual system and mesh *** analyze the region's mean curvature and fluctuation of curvature,and then choose the appropriate regions with high visual masking degree, in order to embed the watermark by using the interpolation *** experimental results show that the watermark is capacious,invisible and robust against various attacks.

关键词： 3D Mesh Watermark Visual Distortion curvature interpolation algorithm

来源：评论

学校读者我要写书评

暂无评论

Discrimination of local and faint changes from satellite-borne microwave-radiometer data

引用

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 2008年第9期46卷 2684-2691页

作者： Maeda, Takashi Takano, Tadashi Japan Aerosp Explorat Agcy Earth Observat Res Ctr Tsukuba Ibaraki 3058505 Japan Japan Aerosp Explorat Agcy Inst Space & Astronaut Sci Sagamihara Kanagawa 2298510 Japan

In order to extract a local and faint variation generated by a specific source from a physical value obtained by a remote-sensing satellite, we should focus on the difference between physical values at two points. We have developed a new data-restructuring algorithm based on this concept. This algorithm enables us to obtain a distribution of physical values at any interval and to calculate the difference between any two points regardless of the sensor-sampling interval. This paper presents this algorithm and how to implement it on a computer. Based on this data-restructuring algorithm, we have established a new data-processing method and analyzed the brightness-temperature data obtained by a microwave radiometer. As a result, we have successfully extracted the feature associated with a volcanic eruption. This feature cannot be extracted from brightness temperatures directly. This paper demonstrates this data-processing method by analyzing a volcanic eruption.

关键词： data processing interpolation algorithm microwave radiometer natural-disaster monitoring

来源：评论

学校读者我要写书评

暂无评论

Assessment of algorithms for the no-slip boundary condition in the lattice Boltzmann equation of BGK model

引用

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS 2008年第12期58卷 1353-1378页

作者： Suh, Yong Kweon Kang, Jinfen Kang, Sangmo Dong A Univ Dept Mech Engn Pusan 604714 South Korea

Three kinds of algorithms for the lattice Boltzmann equation of the BGK model in the implementation of the no-slip boundary condition on the wall are assessed by using the analytical formula for the slip velocity of the fully developed pressure-driven channel How. It is shown that the bounce-back algorithm results in the spatial accuracy of 1st order, except for the case when the wall is located at half way between the two grid lines. The interpolation scheme proposed by Yu et at. (Prog. Aerospace Sci. 2003;39:329-367) and the similar one by Bouzidi et al. (Phys. Fluids 2001 13(11):3452-3459) are of 2nd order, but the error increases quadratically with the relaxation time. The extrapolation scheme of Guo et al. (Phys. Fluids 2002;14(6):2007-2010) is also shown to be of 2nd order, and the error level increases linearly with the relaxation time, but it turns Out that this scheme is unstable for a certain range of parameter values. Numerical experiments with various parameter sets have been performed to obtain the stability diagram. Three algorithms are then applied to a circular-Couette flow and their performance is also studied in terms of the numerical accuracy and stability. Copyright (C) 2008 John Wiley & Sons, Ltd.

关键词： lattice Boltzmann equation BGK model no-slip boundary condition interpolation algorithm extrapolation algorithm channel flow circular-Couette flow

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：