检索结果-内蒙古大学图书馆

5th International Conference on Advanced Computing and Communication Systems (ICACCS)

作者： Chhetri, Bikash Thapa Alsadoon, Abeer Prasad, P. W. C. Venkata, Haritha Sallepalli Elchouemi, Amr Study Grp Australia Sydney NSW Australia Forbes Sch Business & Technol Lenexa KS USA

ISBN: (纸本)9781538695333

Technologies like Global positioning system (GPS), sensors, Infrared (IR) Wi-Fi, cellular signals, etc. for tracking the movement of an object lack the location precision. The existing systems developed with these technologies were lacked of efficiency and accuracy to locate patient inside the hospital for utilizing the available resources (doctors, nurse, staff and equipment). Therefore, we propose a system which minimizes the location error with less processing time for an indoor moving patient. Proposed system comprises Received Signal Strength Indicator (RSSI) with the existing Weighted Centroid Localization (WCL) methods improve the signal strength of a signal received from the tag and determining the exact position of moving tag by reducing the location error and improving the processing time The efficiently tracks moving patient inside the hospital with decreased processing time from 86ms to 52ms and 116ms to 97ms also less location error from 0.08m to 0.03m and 0.18m to 0.15m based upon the number of tags deployed, i.e. 10 and 20 respectively. Thus, this solution provides hospital management accurate tracking of moving patient for efficient allocation of the available resources (doctors, nurse, examination room, etc.) based upon their position.

关键词： Indoor navigation Radio Frequency Identification (RFID) system tracking algorithm Proximity location system

来源：评论

学校读者我要写书评

暂无评论

Visual tracking using locality-constrained linear coding under a particle filtering framework

引用

IET COMPUTER VISION 2018年第2期12卷 196-207页

作者： Ding, Meng Wei, Li Cao, Yunfeng Wang, Jie Cao, Li Nanjing Univ Aeronaut & Astronaut Coll Civil Aviat 29 Jiangjun St Nanjing Jiangsu Peoples R China Sci & Technol Electroopt Control Lab 25 Kaixuan St Luoyang Peoples R China Nanjing Univ Aeronaut & Astronaut Jin Cheng Coll 88 Hangjin St Nanjing Jiangsu Peoples R China Nanjing Univ Aeronaut & Astronaut Coll Astronaut 29 Yudao St Nanjing Jiangsu Peoples R China

Visual target tracking has long been a challenging problem because of the variable appearance of the target with changing spatiotemporal factors. Therefore, it is important to design an effective and efficient appearance model for tracking tasks. This study proposes a tracking algorithm based on locality-constrained linear coding (LLC) under a particle filtering framework. A local feature descriptor is presented that can evenly represent the local information of each patch in the tracking region. LLC uses the locality constraints to project each local feature descriptor into its local-coordinate system. Compared with sparse coding, LLC can be performed very quickly for appearance modelling because it has an analytical solution derived by a three-step matrix calculation, and the computational complexity of the proposed tracking algorithm is o(eta x m x n). Both quantitative and qualitative experimental results demonstrate that the authors' proposed algorithm performs favourably against the 10 state-of-the-art trackers on 12 challenging test sequences. However, related experimental results show that the performance of their tracker is not effective enough for small tracking targets owing to a lack of sufficient local region information.

关键词： linear codes particle filtering (numerical methods) target tracking local region information computational complexity matrix calculation local feature descriptor LLC tracking algorithm spatiotemporal factors variable appearance visual target tracking particle filtering framework locality constrained linear coding visual tracking

来源：评论

学校读者我要写书评

暂无评论

A Comparison of Northern Hemisphere Atmospheric Rivers Detected by a New Image-Processing Based Method and Magnitude-Thresholding Based Methods

引用

ATMOSPHERE 2020年第6期11卷 628-628页

作者： Xu, Guangzhi Ma, Xiaohui Chang, Ping Wang, Lin Ocean Univ China Inst Adv Ocean Studies Key Lab Phys Oceanog Qingdao 266100 Peoples R China Qingdao Natl Lab Marine Sci & Technol Qingdao 266100 Peoples R China Texas A&M Univ Int Lab High Resolut Earth Syst Predict College Stn TX 77843 USA Texas A&M Univ Dept Oceanog College Stn TX 77843 USA Texas A&M Univ Dept Atmospher Sci College Stn TX 77843 USA Chinese Acad Sci Ctr Monsoon Syst Res Inst Atmospher Phys Beijing 100029 Peoples R China Ocean Univ China Key Lab Phys Oceanog Qingdao Peoples R China

A majority of the existing atmospheric rivers (ARs) detection methods is based on magnitude thresholding on either the integrated water vapor (IWV) or integrated vapor transport (IVT). One disadvantage of such an approach is that the predetermined threshold does not have the flexibility to adjust to the fast changing conditions where ARs are embedded. To address this issue, a new AR detection method is derived from an image-processing algorithm that makes the detection independent of AR magnitude. In this study, we compare the North Pacific and Atlantic ARs tracked by the new detection method and two widely used magnitude thresholding methods in the present day climate. The results show considerable sensitivities of the detected AR number, shape, intensities and their accounted IVT accumulations to different methods. In many aspects, ARs detected by the new method lie between those from the two magnitude thresholding methods, but stand out with a greater number of AR tracks, longer track durations, and stronger AR-related moisture transport in the AR tracks. North Pacific and North Atlantic ARs identified by the new method account for around 100-120 x 10(3) kg/m/s IVT within the AR track regions, about 50%more than the other two methods. This is primarily due to the fact that the new method captures the strong IVT signals more effectively.

关键词： atmospheric river storm tracks tracking algorithm

来源：评论

学校读者我要写书评

暂无评论

tracking topic evolution via salient keyword matching with consideration of semantic broadness for Web video discovery

引用

MULTIMEDIA TOOLS AND APPLICATIONS 2018年第16期77卷 20297-20324页

作者： Harakawa, Ryosuke Ogawa, Takahiro Haseyama, Miki Hokkaido Univ Grad Sch Informat Sci & Technol Sapporo Hokkaido Japan

A method to track topic evolution via salient keyword matching with consideration of semantic broadness for Web video discovery is presented in this paper. The proposed method enables users to understand the evolution of topics over time for discovering Web videos in which they are interested. A framework that enables extraction and tracking of the hierarchical structure, which contains Web video groups with various degrees of semantic broadness, is newly derived as follows: Based on network analysis using multimodal features, i.e., features of video contents and metadata, our method extracts the hierarchical structure and salient keywords that represent contents of each Web video group. Moreover, salient keyword matching, which is newly developed by considering salient keyword distribution, semantic broadness of each Web video group and initial topic relevance, is applied to each hierarchical structure obtained in different time stamps. Unlike methods in previous works, by considering the semantic broadness as well as the salient keyword distribution, our method can overcome the problem of the desired semantic broadness of topics being different depending on each user. Also, the initial topic relevance enables correction of the gap from an initial topic at the start of tracking. Consequently, it becomes feasible to track the evolution of topics over time for finding Web videos in which the users are interested. Experimental results for real-world datasets containing YouTube videos verify the effectiveness of the proposed method.

关键词： Web video Video retrieval Topic evolution tracking algorithm Network analysis

来源：评论

学校读者我要写书评

暂无评论

CS-MMPF-based weak target detection and tracking with range ambiguity

引用

JOURNAL OF ENGINEERING-JOE 2019年第21期2019卷 8066-8070页

作者： Tan, Shuncheng Wang, Guohong Sung, Dianxing Yu, Hongbo Naval Aviat Univ Yantai Peoples R China Natl Univ Def Technol Changsha Hunan Peoples R China

To address the problem of target detection and tracking with the range ambiguous radar in low signal-to-noise ratio environment, a novel weak target detection and tracking algorithm based on the compressed sensing (CS) and multiple model particle filter (MMPF) is proposed. The general solution is that constructing an over-complete atom dictionary according to the echo model of target, obtaining a sparse representation of the target echo signal with the CS method, and conducting a threshold detection with the obtained atom energy distribution and judge whether a target is present or not firstly;roughly extracting the ambiguous measurement of weak target by resolving the least square problem constrained by one-norm minimisation if a target is present then proposing an ambiguous measurement-based MMPF manoeuvring target tracking method, and realising an effective detection and tracking of manoeuvring weak target in the presence of range measurement ambiguity lastly. Simulation results demonstrate that the proposed method can improve the radar performance of target detection and tracking effectively, and succeeds in range ambiguity resolving.

关键词： particle filtering (numerical methods) noise radar detection Doppler radar target tracking radar tracking object detection range ambiguous radar low signal-to-noise ratio environment novel weak target detection tracking algorithm multiple model particle filter over-complete atom dictionary echo model target echo signal CS method threshold detection atom energy distribution judge ambiguous measurement-based MMPF manoeuvring target tracking method range measurement ambiguity range ambiguity resolving

来源：评论

学校读者我要写书评

暂无评论

Optimization of the Track Reconstruction algorithm in a Pixel Based Range Telescope for Proton Computed Tomography

Optimization of the Track Reconstruction Algorithm in a Pixe...

引用

作者： Alba Garcia Santos Delft University of Technology

学位级别：硕士

The use of protons to treat cancer has expanded rapidly in the past two decades. For safe and e↵ective proton therapy, the proton range in a patient's body must be accu- rately determined. Current treatment planning is based on X-ray computed tomogra- phy images, which might cause uncertainty because of the di↵erent behaviour between protons and X-rays. As an alternative, proton Computed Tomography (pCT) has been proposed to directly measure the Relative Stopping Power (RSP) map in the patient and reduce this uncertainty. During a proton CT scan, a high-energy proton beam is directed at the patient. Then, the proton's residual energy and position are measured with a detector placed behind the patient. This information is used to calculate the volumetric RSP. In the case of using a pixel based detector, a tracking algorithm is required in order to increase the proton intensity capacity of the detec- tor. A proton track reconstruction system has been already developed by Pettersen [1], however, it has some limitations on the track density that can be reconstructed correctly. The algorithm is based on the track-following scheme, in which a growing track searches for deeper- laying activated pixels. This thesis introduces proton therapy and the advantages of pCT and proton ra- diography for treatment planning. Then, the main track reconstruction techniques found in the literature are reviewed. Improvements in the reconstruction process are proposed and their e? ciencies are discussed. While current algorithm begins from the layer closest to the patient, in the present study a new reconstruction algorithm is developed. It di↵ers by starting the reconstruction process from the distal end of the detector. Based on this new algorithm, studies related to its optimization are conducted. Lastly, an algorithm based on the identification of the most probable scenario is developed. The potential algorithms are evaluated on data simulated with GATE (based on Monte Carlo interactio

关键词： proton Computed Tomography tracking algorithm Digital tracking Calorimeter

来源：评论

学校读者我要写书评

暂无评论

Quadratic Adjustment with Vertex Convergence: an alternative algorithm for maximum power point tracking in photovoltaic modules 37

Quadratic Adjustment with Vertex Convergence: an alternative...

引用

37th IEEE Central America and Panama Convention (CONCAPAN)

作者： Hernandez-Rivera, Miguel Meza, Carlos Inst Tecnol Costa Rica Escuela Ingn Elect Cartago Costa Rica

ISBN: (纸本)9781538635094

In this article it is presented a new algorithm for the tracking of the maximum power point (PMP) in a photovoltaic module. The algorithm Quadratic Adjustment with Vertex Convergence bases its functioning on successive calculations on vertexes of parabolas that will approximate to the point where the photovoltaic system outputs the maximum power. The convergence is reached when the vertex of the last calculated parabola coincides with the maximum power operating point. This method presents a better answer to other methods such as Open Voltage and Perturb and Observe. Its use is an alternative to the method of Incremental Conductance. The new algorithm presents, as an advantage over the other algorithms, a smoother track of the changes in the solar radiation which helps to avoid perturbations on the power output, allows to calculate directly the PMP and, define a collection of neighbor values with a quadratic equation around this point.

关键词： Maximum power point tracking algorithm photovoltaic system

来源：评论

学校读者我要写书评

暂无评论

Comparison of Different tracking Approaches on Pre-Fused Data for Automotive Perception System

Comparison of Different Tracking Approaches on Pre-Fused Dat...

引用

International Symposium on Computational Intelligence and Informatics

作者： László Lindenmaier Viktor Tihanyi Budapest University of Technology and Economics Faculty of Transportation Engineering and Vehicle Engineering Budapest Hungary

ISBN: (数字)9781728156255

ISBN: (纸本)9781728156262

The development of autonomous vehicles requires different sensor types for constructing an accurate local environment model. The evolution of sensor technology is challenging the development of sensor data fusion. Although, the sensors are getting more robust and reliable. However, because of the development of sensors the data fusion should be able to handle diversified sensor clusters. Thus, the high-level sensor fusion algorithms, like track to track method, are getting more important. This paper introduces different tracking approaches, which are intended to support a track-to-track fusion method of an autonomous vehicle in highway situations.

关键词： Autonomous vehicles Automotive perception Sensor Fusion Track-to-track fusion tracking algorithm Data association JIPDA Autonomous Vehicles Sensor fusion data association Sensor data fusion Sensors sensor technology Data fusion

来源：评论

学校读者我要写书评

暂无评论

tracking of Human Sperm in Time-Lapse Images 3

Tracking of Human Sperm in Time-Lapse Images

引用

IEEE 3rd International Conference on Signal and Image Processing (ICSIP)

作者： Wang, Chizhong Choi, Ji-won Urbano, Leonardo F. Masson, Puneet VerMilyea, Matthew Kam, Moshe New Jersey Inst Technol Dept Elect & Comp Engn Newark NJ 07102 USA 70 Beharrel St Concord MA USA Hosp Univ Penn Penn Fertil Care 3400 Spruce St Philadelphia PA 19104 USA Ovat Fertil Austin TX USA

ISBN: (纸本)9781538663967

Human sperm motility analysis is a key method in assessing male fertility. It was suggested that performance of automatic sperm motility analysis systems can be enhanced by adopting multi-target tracking algorithms developed originally for radar technology. We review and appraise several target tracking algorithms operating on synthetic and actual sperm images and compare their performance. Simulations and observations of images of real sperm cells suggest that the joint probability data association filter with track-coalescence-avoiding (JPDA*) outperforms other evaluated algorithms. This is also the result obtained on images of swimming tadpoles.

关键词： human sperm tracking sperm motility performance evaluation tracking algorithm

来源：评论

学校读者我要写书评

暂无评论

An objective global climatology of polar lows based on reanalysis data

引用

QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY 2018年第716期144卷 2099-2117页

作者： Stoll, Patrick J. Graversen, Rune G. Noer, Gunnar Hodges, Kevin Arctic Univ Norway Tromso Norway Norwegian Meteorol Inst Tromso Norway Univ Reading Dept Meteorol Reading Berks England

Here we present an objective global climatology of polar lows. In order to obtain objective detection criteria, the efficacy of several parameters for separating polar lows from other cyclones has been compared. The comparison and the climatology are based on the ERA-Interim reanalysis from 1979 to 2016 and the high-resolution Arctic System Reanalysis from 2000 to 2012. The most effective parameters in separating polar lows from other extratropical cyclones were found to be the difference between the sea-level pressure at the centre of the low and its surroundings, the difference in the potential temperature between the sea surface and the 500 hPa level, and the tropopause wind speed poleward of the system. Other parameters often used to identify polar lows, such as the 10 m wind speed and the temperature difference between the sea surface and the 700 hPa level, were found to be less effective. The climatologies reveal that polar lows occur in all marine basins at high latitudes, but with high occurrence density in the vicinity of the sea-ice edge and coastal zones. The regions showing the highest degree of polar-low activity are the Denmark Strait and the Nordic Seas, especially for the most intense polar lows. In the North Atlantic and Pacific, the main polar-low season ranges from November to March. In the Southern Hemisphere, polar lows are mainly detected between 50 and 65 degrees S from April to October, indicating that this hemisphere compared to its northern counterpart has a two months longer, but less intense, polar-low season. No significant hemispheric long-term trends are observed, although some regions, such as the Denmark Strait and the Nordic Seas, experience significant downward and upward trends in polar lows, respectively, over the last decades. For intense polar lows, a significant declining trend has been observed for the Northern Hemisphere.

关键词： Arctic hurricane detection/identification criteria long-term trend mesoscale cyclone marine cold-air outbreak polar low tracking algorithm

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：