检索结果-内蒙古大学图书馆

Abattoir Site Suitability Modeling Using a Geographic Information System and Multi-Criteria Evaluation–A Case Study of Dire Dawa City, Ethiopia

引用

KN - Journal of Cartography and Geographic Information 2023年第2期73卷 161-178页

作者： Yasin, Kalid Hassen Weldemariam, Elias Cherenet Woldemariam, Gezahegn Weldu Gelete, Tadele Bedo Yuya, Iman Abdella Geo-Information Science Program School of Geography and Environmental Studies Haramaya University P. O. Box138 Dire Dawa 3220 Ethiopia Department of Remote Sensing and Application Research and Development Space Science and Geospatial Institute Entoto Observatory and Research Center (EORC) P.O. Box 33679 Addis Ababa Ethiopia Addis Ababa University P.O. Box 1176 Addis Ababa Ethiopia GIS and Remote Sensing Program DepartmentofGeographyandEnvironmentalStudies Dire Dawa University P.O. Box 1362 Dire Dawa Ethiopia

An abattoir is an essential urban plant that provides services to the community by slaughtering animals, examining, and certifying carcasses, and transporting them to butchers in a residential area hygienically. However, development activities, rapid population growth, and expansion of urban and industrial areas have caused abattoirs to face environmental hazards induced by some neighboring practices;this condition is often the same or worse within and nearby areas of some municipal abattoirs in Ethiopia. The objective of this study was to model and identify the suitable locations with the utmost potential to contribute to the establishment of environmentally sound, socially acceptable, and economically feasible abattoirs in Dire Dawa City, Ethiopia. We applied an integrated modeling approach using an automated Geographic Information Systems (GIS) with Multi-Criteria evaluation (MCE) and the Analytic Hierarchy Process (AHP). The criteria evaluation for suitable site identification and mapping was based on experts' references accompanied by 14 environmental and socioeconomic factors— topographic features (elevation and slopes), land use and land cover, wind direction, solar radiation, and proximity to roads, railways, industrial sites, social services, hydrowells, bus stations, high-tension lines, distance from the airport, and streams—adopted from literature and generated from open-source data. The abattoir suitability map was produced using a linear combination operation after individual factors were weighted and reclassified to a standard scale divided into four classes ranging from restricted to highly suitable. Based on the applied methods, the analysis results revealed that 14.33% of the area was highly suitable, 43.67% moderately to less suitable, and 42% restricted. Moreover, the optimal candidate site for abattoir development with good access to roads and railways covering an area of 1 km² has been found in the northern part of the city. Hence, mu

关键词： Abattoirs AHP Dire Dawa City GIS Land suitability analysis Multi-Criteria Evaluation

来源：评论

学校读者我要写书评

暂无评论

An Anchor-free Method for Aircraft Detection in SAR Images Based on Density Map

An Anchor-free Method for Aircraft Detection in SAR Images B...

引用

Signal, Information and Data Processing (ICSIDP), IEEE International Conference on

作者： Chongsong Wang Yuzhao Li Yuanzhe Shang Wei Pu Rui Han Weizong Liu Yin Zhang Junjie Wu Yulin Huang Jianyu Yang University of Electronic Science and Technology of China Chengdu China Beijing Institute of Remote Sensing Equipment Beijing China

ISBN: (数字)9798331515669

ISBN: (纸本)9798331515676

The accurate detection of aircraft targets in Synthetic Aperture Radar (SAR) imagery is pivotal for aviation safety monitoring and military strategic planning. This paper addresses the challenges in detecting densely arranged aircraft targets within SAR images by introducing a novel detection network based on aircraft density map prediction. Initially, we propose a method for predicting the aircraft density map, which incorporates an innovative coding and decoding approach for aircraft targets, effectively mitigating the issue of overlapping target labels caused by dense distributions. Subsequently, we devise an aircraft density loss function, tailored specifically for the aircraft density map. This method abandons the reliance on preset anchor boxes and significantly enhances the model’s detection performance in scenarios with high-density targets. Comprehensive experimental validation on the SADD public dataset demonstrates that the proposed method exhibits high detection efficiency and accuracy when dealing with small-sized and densely distributed aircraft targets.

关键词： Accuracy Object detection Strategic planning Military aircraft Radar polarimetry Encoding Decoding Aircraft manufacture Aircraft Synthetic aperture radar

来源：评论

学校读者我要写书评

暂无评论

Effect of Periodic Phase Modulation on the Matched Filtering with Insufficient Phase Shift Capability

引用

IEEE Transactions on Aerospace and Electronic Systems 2024年第3期61卷 5755-5770页

作者： Xu, Hong Wei, Haotian Chen, Hui Chen, Zhanye Zhou, Xiaoyang Xu, Heng Quan, Yinghui Xidian University Hangzhou Research Institute Hangzhou311231 China Southeast University State Key Laboratory of Millimeter Waves Nanjing210096 China Southeast University Institute of Electromagnetic Space Nanjing210096 China Xidian University Xi'an Key Laboratory of Advanced Remote Sensing School of Electronic Engineering Xi'an710071 China Xidian University Department of Remote Sensing Science and Technology School of Electronic Engineering Xi'an710071 China Xidian University Key Laboratory of Collaborative Intelligence Systems Ministry of Education School of Electronic Engineering Xi'an710071 China

Utilizing periodic phase modulation (PPM) can shift the echo spectrum, affecting matched filtering (MF) processing, leading to time delay shift or amplitude attenuation. The prior works on the impact of PPM on MF mainly consider an ideal phase modulation model, where the phase shift is considered to be sufficient. In practical applications, the phase shift capability achieved by physical devices for phase modulation is often insufficient due to factors such as hardware limitations, operating bandwidth, and cost constraints. To address this limitation, this paper investigates the quantitative impact of PPM on the MF under conditions of insufficient phase shift. Firstly, reflection coefficient models for PPM under insufficient phase shifts are established, considering 1-bit and 2-bit conditions. Furthermore, for commonly used radar waveforms such as linear frequency modulation (LFM) and phase-coded modulation (PCM), expressions for MF output results under different bit rates are derived, and a quantitative analysis of the time delay and amplitude attenuation compared with the unmodulated case is conducted. Finally, the correctness of the proposed theoretical model is validated through simulation and measured experiments. © 1965-2011 IEEE.

关键词： Matched filters

来源：评论

学校读者我要写书评

暂无评论

Automatic marker-free registration of single tree point-cloud data based on rotating projection

引用

Artificial Intelligence in Agriculture 2022年第1期6卷 176-188页

作者： Xiuxian Xu Pei Wang Xiaozheng Gan Jingqian Sun Yaxin Li Li Zhang Qing Zhang Mei Zhou Yinghui Zhao Xinwei Li School of Science Beijing Forestry UniversityBeijing 100083China Key Laboratory of Quantitative Remote Sensing Information Technology Academy of Opto-ElectronicsBeijing 100094China Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100094China

Point-cloud data acquired using a terrestrial laser scanner play an important role in digital forestry *** scans are generally used to overcome occlusion effects and obtain complete tree structural ***,the placement of artificial reflectors in a forest with complex terrain for marker-based registration is time-consuming and *** this study,an automatic coarse-to-fine method for the registration of pointcloud data from multiple scans of a single tree was *** coarse registration,point clouds produced by each scan are projected onto a spherical surface to generate a series of two-dimensional(2D)images,which are used to estimate the initial positions of multiple *** feature-point pairs are then extracted from these series of 2D *** fine registration,point-cloud data slicing and fitting methods are used to extract corresponding central stem and branch centers for use as tie points to calculate fine transformation *** evaluate the accuracy of registration results,we propose a model of error evaluation via calculating the distances between center points from corresponding branches in adjacent *** accurate evaluation,we conducted experiments on two simulated trees and six real-world *** registration errors of the proposed method were 0.026 m around on simulated tree point clouds,and 0.049 m around on real-world tree point clouds.

关键词： Coarse registration Feature-point matching Fine registration Multi-station tree point cloud Point-cloud registration

来源：评论

学校读者我要写书评

暂无评论

Seismicity modulation by external stress perturbations in plate boundary *** plate interior

引用

Geoscience Frontiers 2022年第3期13卷 53-67页

作者： Batakrushna Senapati Bhaskar Kundu Shuanggen Jin Department of Earth and Atmospheric Sciences NIT RourkelaRourkela 769008India Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China School of Remote Sensing and Geomatics Engineering Nanjing University of Information Science and TechnologyNanjing 210044China

Characterization of critically stressed seismogenic fault systems in diverse tectonic settings can be used to explore the stress/frictional condition of faults,along with its sensitivity for seismicity modulation by periodic stress ***,the process of seismicity modulation in response to external stress perturbation remains *** this paper,the characteristic difference in the seismicity modulation due to resonance destabilization phenomenon governed by rate-and-state friction is presented and val-idated with the globally reported cases of seismicity modulation in diverse tectonic *** rela-tively faster-moving plate boundary regions are equally susceptible for both shorter-period(e.g.,semi-diurnal,diurnal,and other small tidal constituents)and long-period(e.g.,semi-annual,annual,pole tide and pole wobble)seismicity modulation processes in response to stress perturbations from natural har-monic forcing,including tidal,semi-annual,annual,or multi-annual time *** contrast,slowly deforming stable plate interior regions and diffuse deformation zones appear to be more sensitive for long-period seismicity modulation of semi-annual,annual,or even multi-annual time scales but less sen-sitive for short-period seismicity *** finding is also supported by the theoretical model pre-dictions from the resonance destabilization process and worldwide documented natural observations of seismicity modulation in diverse types of tectonic settings.

关键词： Seismicity modulation Resonance destabilization Plate boundary Stable plate interior

来源：评论

学校读者我要写书评

暂无评论

Conceptual Study and Performance Analysis of Tandem Multi-Antenna Spaceborne SAR Interferometry

Journal of Remote Sensing

引用

Journal of remote sensing 2024年第1期4卷 548-566页

作者： Fengming Hu Feng Xu Robert Wang Xiaolan Qiu Chibiao Ding Yaqiu Jin Key Laboratory for Information Science of Electromagnetic Waves(MoE) Fudan UniversityShanghai 200433China Department of Space Microwave Remote Sensing System Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100190China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 101408China National Key Laboratory of Science and Technology on Microwave Imaging Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100094China

Multi-baseline synthetic aperture radar interferometry(InSAR),capable of mapping 3D surface model with high precision,is able to overcome the ill-posed problem in the single-baseline *** tandem SAR mission utilizes a two-stage global coverage to get the dual-baseline interferograms,which achieves the trade-off between the unwrapping errors and height ***,the baseline adjustment will decrease the timeliness of the data acquisition,which is not suitable for monitoring temporal changes of the ground *** a SAR mission with the single-pass multi-baseline acquisition will improve the practical capability in fast 3D *** the asymptotic 3D phase unwrapping proposed for the airborne array InSAR system,it is possible to get a reliable 3D reconstruction using very sparse acquisitions but the interferograms should follow the optimal baseline *** this article,a new concept of tandem multi-antenna SAR interferometry system for acquiring optimal single-pass multi-baseline interferograms is *** indicators,i.e.,expected relative height precision and successful phase unwrapping rate,are selected to optimize the system ***,taking the satellites with two antennas as an example,the performances of various baseline configurations in typical scenarios and the impact of different error sources are investigated *** simulation-based experiments demonstrate that the proposed system acquires the optimal MB interferograms for asymptotic 3D phase unwrapping,and thus enables good performance in both urban and forest area in a single *** system has the potential applications in accurate digital surface model acquisition,3D target recognition,and biomass estimation.

关键词： tandem sar synthetic aperture radar monitoring temporal changes multi baseline interferometry D surface modeling d surface model unwrapping errors baseline adjustment

来源：评论

学校读者我要写书评

暂无评论

Combining machine learning,space-time cloud restoration and phenology for farm-level wheat yield prediction

引用

Artificial Intelligence in Agriculture 2021年第1期5卷 208-222页

作者： Andualem Aklilu Tesfaye Daniel Osgood Berhane Gessesse Aweke Department of Remote sensing at Ethiopian Space Science and Technology Institute Addis Ababa UniversityEthiopia International Research Institute for Climate and Society Earth InstituteColumbia UniversityUnited States of America Department head of the remote sensing unit at Ethiopian Space Science and Technology Institute Addis Ababa UniversityEthiopia

Though studies showed the potential of high-resolution optical sensors for crop yield prediction,several factors have limited their wider *** main factors are obstruction of cloud,identification of phenology,demand for high computing infrastructure and the complexity of statistical *** this research,we created a novel approach by combining four ***,we implemented the cloud restoration algorithm called gapfill to restore missed Normalized Difference Vegetation Index(NDVI)values derived from Sentinel-2 sensor(S2)due to cloud ***,we created square tiles as a solution for high computing infrastructure demand due to the use of high-resolution ***,we implemented gapfill following critical crop phenology ***,observations from restored images combined with original(from cloud-free images)values and applied for winter wheat *** applied seven base machine learning as well as two groups of super learning *** study successfully applied gapfill on high-resolution image to get good quality estimates for cloudy ***,yield prediction accuracy increased due to the incorporation of restored values in the regression *** models such as Generalized Linear Regression(GLM)and Random Forest(RF)showed improved capacity compared to other base and ensemble *** two models revealed RMSE of 0.001 t/ha and 0.136 t/ha on the holdout *** twomodels also revealed consistent and better performance using scatter plot analysis across three *** approach developed is useful to predict wheat yield at field scale,which is a rarely available but vital in many developmental projects,using optical sensors.

关键词： Cloud restoration Ensemble learning Machine learning Phenology Sentinel-2 Wheat yield prediction

来源：评论

学校读者我要写书评

暂无评论

A method to enhance the detection capability of optical sensing based on the quantum characteristics of vortex beam 10

A method to enhance the detection capability of optical sens...

引用

Quantum and Nonlinear Optics X 2023

作者： Li, Xiang Zhang, Qinlang Yi, Yang Zhou, Yifan Yin, Zhenping Lun, Yinghao Dong, Xiangyu Chen, Qianyuan Wei, Lude Wang, Xuan School of Remote Sensing and Information Engineering Wuhan University Wuhan China Qingdao National Laboratory for Marine Science and Technology Qingdao China School of Microelectronics Hubei University Wuhan China Wuhan Institute of Quantum Technology Wuhan China

ISBN: (纸本)9781510667990

We propose a method based on vortex beams, which carries optical orbital angular momentum (OAM) to achieve spatial separation of coherent signal light and incoherent noise light and conducted experiments to evaluate the effect. Based on the experimental results, we established the relationship between signal-to-noise ratio (SNR) and topological charge number, signal channel size, and then optimized the relevant parameters. We built a LIDAR system for underwater detection to verify the practical effectiveness of the method. The experimental results demonstrate a significant improvement in the SNR for underwater detection. © 2023 SPIE.

关键词： Signal to noise ratio

来源：评论

学校读者我要写书评

暂无评论

remote sensing and its applications using GNSS reflected signals:advances and prospects

引用

Satellite Navigation 2024年第1期5卷 10-51页

作者： Shuanggen Jin Adriano Camps Yan Jia Feng Wang Manuel Martin-Neira Feixiong Huang Qingyun Yan Shuangcheng Zhang Zhongyu Li Komi Edokossi Dongkai Yang Zhiyu Xiao Zhongmin Ma Weihua Bai Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai200030China School of Surveying and Land Information Engineering Henan Polytechnic UniversityJiaozuo454003China Department of Signal Theory and Communications Technical University of CataloniaBarcelona08034Spain Department of Surveying and Geoinformatics Nanjing University of Posts and TelecommunicationsNanjing210023China School of Electronics and Information Engineering Beihang UniversityBeijing100191China European Space Research and Technology Centre(ESTEC) European Space Agency2200-AGNoordwijkThe Netherlands National Space Science Center Chinese Academy of SciencesBeijing100190China School of Remote Sensing and Geomatics Engineering Nanjing University of Information Science and TechnologyNanjing210044China College of Geological Engineering and Geomatics Chang’an UniversityXi’an710054China University of Electronic Science and Technology of China Chengdu611731China

The Global Navigation Satellite Systems(GNSS),including the US’s GPS,China’s BDS,the European Union’s Galileo,and Russia’s GLONASS,offer real-time,all-weather,any-time,anywhere and high precision observations by transmitting L band signals continuously,which have been widely used for positioning,navigation and *** the development of GNSS technology,it has been found that GNSS-reflected signals can be used to detect Earth’s surface characteristics together with other signals of *** this paper,the current status and latest advances are presented on Global Navigation Satellite System-Reflectometry(GNSS-R)in theory,methods,techniques and *** developments and progresses in GNSS-R instruments,theoretical modeling,and signal processing,ground and space-/air-borne experiments,parameters retrieval(*** speed,sea surface height,soil moisture,ice thickness),sea surface altimetry and applications in the atmosphere,oceans,land,vegetation,and cryosphere are given and reviewed in ***,the challenges in the GNSS-R development of each field are also ***,the future applications and prospects of GNSS-R are discussed,including multi-GNSS reflectometry,new GNSS-R receivers,GNSS-R missions,and emerging applications,such as mesoscale ocean eddies,ocean phytoplankton blooms,microplastics detection,target recognition,river flow,desert studies,natural hazards and landslides monitoring.

关键词： GNSS Reflectometry remote sensing Environmental change

来源：评论

学校读者我要写书评

暂无评论

Identification of Groundwater Potential Zones Using Machine Learning Algorithms and Geospatial Techniques

Identification of Groundwater Potential Zones Using Machine ...

引用

2023 International Conference on Data science, Agents and Artificial Intelligence, ICDSAAI 2023

作者： Nagamani, K. Meer, Mohammad Suhail Anuradhha, Baskaran Bhuvaneswari, C. Packialakshmi, S. Centre for Remote Sensing and Geoinformatics Sathyabama Institute of Science and Technology Tamil Nadu Chennai600119 India Cit Department of Civil Engineering Tamil Nadu Chennai600-119 India Sathyabama Institute of Science & Technology Eee Deparment Tamil Nadu Chennai600119 India Sathyabama Institute of Science & Technology Department of Civil Engineering Tamil Nadu Chennai600-119 India

ISBN: (纸本)9798350348910

In contemporary times, groundwater has emerged as the predominant source of irrigation in India, alongside serving as the principal provider of potable water in several regions. The rise in population has led to a surge in water consumption, thus leading to a decline in groundwater levels. Groundwater plays a pivotal role as a vital source that contributes significantly to the annual water supply. This research investigates various approaches to identify potential groundwater zones by employing geographic information systems (GIS) and remote sensing, while also including machine learning techniques. These methodologies provide a reliable means to map areas with high groundwater potential. The mapping of groundwater zones encompasses a wide spectrum of procedural variations. To effectively manage groundwater zones, it is imperative to consider multiple criteria, encompassing soil characteristics, drainage density, land utilization, precipitation patterns, land cover types, slope gradients, geological composition, geomorphological features, and contour variations. This paper examines the approaches employed in groundwater mapping, with a particular focus on the utilization of satellite remote sensing and other relevant data sources in the development of these methodologies. These tactics employ a combination of traditional and innovative approaches. Thematic layers are employed for the objectives of analyzing, mapping, and identifying groundwater potential. The evaluation of the significance and magnitude of each thematic layer is conducted in connection to the geographical location, zones of possible groundwater availability, and prevailing groundwater conditions. Maps of groundwater potential zones were generated by the use of machine learning algorithms. These maps were then classified into five distinct categories, which are as follows: very low, low, moderate, high, and very high. © 2023 IEEE.

关键词： Water supply

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：