检索结果-内蒙古大学图书馆

Research on leakage current test method

仪器仪表学报 2014年第S2期35卷 219-223页

作者： Li Dong Wang Yanlin Beijing Key Laboratory of Electromechanical System Measurement and Control Beijing Information Science and Technology University

In the leakage current test, through the high speed data collection and digital filtering to the output voltage of the human body impedance network, leakage current test that is in accordance with many kinds of electrical safety standards can be realized, and the frequency distribution information of the leakage current can be got as well, which can be used to much more completely evaluate the possible damage degree of the leakage current to the human body and analyze the reason for the appearance of the leakage current in the electric equipment.

关键词： leakage current test human body imspedance network

来源：评论

学校读者我要写书评

暂无评论

A selection method of frequency combination in MF-InSAR system

A selection method of frequency combination in MF-InSAR syst...

引用

IET International Radar Conference 2015

作者： Qi, Yalin Zhang, Qi Yang, Wenfu Yang, Shuangjing Liu, Tiandong Beijing Key Laboratory of Embedded Real-Time Information Processing Technology Radar Research Lab. School of Information and Electronics Beijing Institute of Technology Beijing100081 China China Academy of Launch Vehicle Technology Beijing100076 China Beijing Institute of Spacecraft System Engineering CAST Beijing100094 China

ISBN: (纸本)9781849199940

As an extension of the Interferometric Synthetic aperture radar (InSAR), the multi-frequency InSAR can realize high-accuracy elevation extraction of the steep terrain. Though the maximum likelihood estimation (MLE) is widely used in the signal processing of multi-frequency InSAR, the performance of this method can be influenced by the selection of frequency combination. At the beginning, this paper analyses the elevation estimated effectiveness of different frequency combinations from the aspect of Cramer-Rao Lower Bound (CRLB). Then, it calculates the ambiguity cycle as a further filter for the optimal frequency combination. Finally, this paper discusses the adaptability to the phase noise with the help of Monte Carlo simulation strategy. In consideration of these three aspects, a selection method of frequency combination is proposed, and further simulation results are provided in quantity. Relevant researches can be used in the design of multi-frequency InSAR system.

关键词： Phase noise

来源：评论

学校读者我要写书评

暂无评论

Optimization approach for multi-scale segmentation of remotely sensed imagery under k-means clustering guidance

引用

Cehui Xuebao/Acta Geodaetica et Cartographica Sinica 2015年第5期44卷 526-532页

作者： Wang, Huixian Jin, Huijia Wang, Jiaolong Jiang, Wanshou State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan430079 China Key Laboratory of Technology in Geo-spatial Information Processing and Application System Institute of Electronics Chinese Academy of Sciences Beijing100190 China Hebei Provincial Institute of Cartography Shijiazhuang050031 China

In order to adapt different scale land cover segmentation, an optimized approach under the guidance of k-means clustering for multi-scale segmentation is proposed. At first, small scale segmentation and k-means clustering are used to process the original images;then the result of k-means clustering is used to guide objects merging procedure, in which Otsu threshold method is used to automatically select the impact factor of k-means clustering;finally we obtain the segmentation results which are applicable to different scale objects. FNEA method is taken for an example and segmentation experiments are done using a simulated image and a real remote sensing image from GeoEye-1 satellite, qualitative and quantitative evaluation demonstrates that the proposed method can obtain high quality segmentation results. ©, 2015, SinoMaps Press. All right reserved.

关键词： Remote sensing

来源：评论

学校读者我要写书评

暂无评论

A Dynamic Queue Based Pipeline Filter for Infrared Dim Small Target Detection

A Dynamic Queue Based Pipeline Filter for Infrared Dim Small...

引用

第三十四届中国控制会议

作者： Changcheng Wang Yuheng Shen Di Zhang Yunze Cai Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information ProcessingMinistry of Education of China The 8th institute of Shanghai Academy of Spaceflight Technology

ISBN: (纸本)9781467374439

The pipeline filter algorithm is a classical method which combines the time domain with the spatial domain in the field of information processing, but for it has problem in suppressing the fixed position sharp noise and poor real-time performance, it is restricted in the infrared dim small target *** solve this problem, this paper establishes threedimensional dynamic queue pipeline, raises a dynamic queue strategy and uses space-domain algorithm based on morphology Top-Hat operator to do a second searching to ensure the continuity of the target and the pipeline. The simulation results show that for infrared sequential image, especially multi-target image, the method proposed in this paper can detect and output target trajectory nearly real-time, while ensuring an ideal probability of detection and low false alarm rate.

关键词： Dynamic Queue Pipeline Filter,IR Dim Small Target Detection,IR Sequential Image

来源：评论

学校读者我要写书评

暂无评论

SEAMLESS SWITCHING OF H.265/HEVC-CODED DASH REPRESENTATIONS WITH OPEN GOP PREDICTION STRUCTURE

SEAMLESS SWITCHING OF H.265/HEVC-CODED DASH REPRESENTATIONS ...

引用

IEEE International Conference on Image processing

作者： Ye Yan Miska M. Hannuksela Houqiang Li CAS Key Laboratory of Technology in Geo-spatial Information Processing and Application System University of Science and Technology of China Nokia Technologies

ISBN: (纸本)9781479983407

The Dynamic Adaptive Streaming over HTTP (DASH) enables bitrate adaptation through different representations of the same content. It is common to encode random access point (RAP) pictures at segment boundaries to support representation switching. As an open group of pictures (GOP) results into a temporary discontinuity of the video playback due to the inability to decode some pictures when switching representations, closed GOP prediction structures are normally used in DASH. This paper proposes two similar methods for using the open GOP prediction structure in DASH representations while a full picture rate is maintained also during representation switching. The first method is enabled with straightforward changes in the decoding of the High Efficiency Video Coding (H.265/HEVC) standard, whereas the second method utilizes the adaptive resolution change feature of the scalable (SHVC) extension of H.265/HEVC. Experiments show that the proposed methods outperform the use of closed GOPs by 5.6% on average in terms of Bjontegaard delta bitrate (BD-rate).

关键词： DASH H.265 HEVC representations High efficiency video coding switching SEAMLESS DECODING picture Bit rate

来源：评论

学校读者我要写书评

暂无评论

Three-Dimensional Point-Cloud Plus Patches: Towards Model-Based Image Coding in the Cloud

Three-Dimensional Point-Cloud Plus Patches: Towards Model-Ba...

引用

IEEE International Conference on Multimedia Big Data (BigMM)

作者： Dong Liu Tong Shao Houqiang Li Feng Wu CAS Key Laboratory of Technology in Geo-spatial Information Processing and Application System University of Science and Technology of China Hefei China

ISBN: (纸本)9781479986897

In the era of cloud computing, there are many correlated images in the cloud, joint compression of these images may provide much higher compression ratio than individual coding. Model-based coding is an appealing approach to image coding in the cloud, as it removes knowledge redundancy among images that share the same model. In this paper, we make an attempt to model-based image coding for landmark images, where our model consists of three-dimensional (3-D) point-cloud plus image patches to describe the geometry and surface color of the landmark respectively. The camera parameters of an input image are estimated based on the 3-D point-cloud and the patches in the model, and then prediction image is generated by selecting, warping, and stitching image patches as well as illuminance compensation, the residue between original and prediction images is compressed by P-frame coding in HEVC encoder. We perform experiments on an Internet photo collection to verify the effectiveness of the proposed scheme. Preliminary results display the superior performance of our scheme that achieves as high as 39.9% bits saving compared to HEVC intra on a single image. The proposed scheme indicates a promising approach to image coding in the cloud and is worthy of in-depth investigation.

关键词： Image coding Solid modeling Cameras Decoding Redundancy Feature extraction Lighting

来源：评论

学校读者我要写书评

暂无评论

Objective quality assessment for image retargeting based on hybrid distortion pooled model

Objective quality assessment for image retargeting based on ...

引用

International Workshop on Quality of Multimedia Experience, QoMEx

作者： Jianxin Lin Lingling Zhu Zhibo Chen Xiaoming Chen CAS Key Laboratory of Technology in Geo-spatial Information Processing and Application System University of Science and Technology of China Hefei China

ISBN: (纸本)9781479989591

With the increasing popularity of mobile devices, there are more and more screens with heterogeneous resolutions. In order to solve the mismatching problem of images displaying on different screens, various image retargeting techniques have been proposed. However, little effective objective quality assessment metric for image retargeting has been proposed. In this paper, we propose an objective image retargeting quality assessment method based on Hybrid Distortion Pooled Model (HDPM) considering image local similarity, content information loss and image structural distortion. The proposed HDPM method measures the retargeted image's local similarity based on matching the similar block by Scale-Invariant Features Transform (SIFT) features and computing the corresponding blocks' similarity by structural similarity (SSIM). Furthermore, the image content information loss in retargeted image, which is regarded as the SIFT feature loss, is taken into account. Besides, we also consider image's structural distortion in the proposed method, which is based on GLCM (Gray-level co-occurrence matrix). To evaluate the effectiveness of the proposed method, extensive experiments have been conducted, and the results show improved consistency between the proposed HDPM method and the corresponding subjective evaluations.

关键词： Distortion Quality assessment Correlation Feature extraction Distortion measurement Image edge detection Image quality

来源：评论

学校读者我要写书评

暂无评论

UWB-GPR Clutter Suppression Technology Based on Gradient Transform Algorithm

UWB-GPR Clutter Suppression Technology Based on Gradient Tra...

引用

2015 International Conference on control, Automation and Artificial Intelligence(CAAI 2015)

作者： Yao QIN De-mei YANG Li-hong QIAO College of Information Science and Engineering Henan University of Technology Key Laboratory of Grain Information Processing and Control Henan University of TechnologyMinistry of Education

Clutter is a serious problem existing in ultra wideband ground penetrating radar(UWB-GPR) *** heavily influences the target detection ability of radar *** scale of GPR reflected image is very different between target reflected position and non-target reflected position,so as the gradient value of GPR reflected *** on this theory,gradient transform method to suppress GPR clutter is used in this *** first,the variety of clutter are been discussed,then the principle of gradient transform is been *** dealing with GPR experiment image,it shows that the gradient transform method used in GPR clutter suppression technology is effectiveness and stability.

关键词： GPR Clutter suppression Gradient transform algorithm

来源：评论

学校读者我要写书评

暂无评论

Flexible video processing platform for 8K UHD TV

Flexible video processing platform for 8K UHD TV

引用

IEEE Hot Chips Symposium (HCS)

作者： Sukjin Kim Young-Hwan Park Jaehyun Kim Minsoo Kim Wonchang Lee Shihwa Lee Graduate School of Information Science & Technology Hokkaido University Sapporo Hokkaido Japan Science and Technology on Avionics Integration Laboratory Shanghai Department of Automation Key Laboratory of System Control and Information Processing Shanghai P. R. China

This article consists of one slide from the authors' conference presentation. The Samsung Reconfigurable Processor is Samsung's proprietary DSP processor since 2005.

ISBN: (纸本)9781467388863

This article consists of one slide from the authors' conference presentation. The Samsung Reconfigurable Processor is Samsung's proprietary DSP processor since 2005.

关键词： Throughput Digital signal processing VLIW Streaming media HDTV Reconfigurable architectures

来源：评论

学校读者我要写书评

暂无评论

Saturated Output-Based Event-Triggered control for Consensus of Multi-Agent systems

Saturated Output-Based Event-Triggered Control for Consensus...

引用

第27届中国控制与决策会议

作者： Xiongjun Wu Kun Cai Department of Automation Shanghai Jiao Tong Universityand Key Laboratory of System Control and Information ProcessingMinistry of Education of China Science and Technology on Electromagnetic Scattering Laboratory The Eighth Academy of China Aerospace Science and Technology Corporation

A saturation allowed output-based event-triggered control for consensus of multi-agent systems(MAS for short) design method is proposed in this paper for the linear systems subject to input *** introduced the saturation allowed controller design method into the multi-agent schemes,in which an event-triggered mechanism are *** multi-agent controllers are not activated until the response of the system exceeds some pre-defined eventtriggered limitation,rather than periodically sampling as ***,the output feedback scheme is introduced into the event-triggered MAS *** this case,the output feedback of the plant is activated when it really need to,and then the saturation allowed method is then employed to deal with the saturation *** this proposed scheme,since the saturation is allowed and no hard constraint is needed to imposed on the controller input,we can makes fuller utilization of the available actuator *** proposed saturated output-based event-triggered control scheme provides the system stability and guaranteed event-triggered condition for consensus of multi-agent ***,results are provided for minimizing the frequency of the event-triggered actions.

关键词： Actuator saturation,event-triggered control,multi-agent systems.

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：