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Bridging open source tools and Geoportals for interactive spatial data analytics

Geo-Spatial Information Science 2019年第3期22卷 185-192页

作者： Bing She Tao Hu Xinyan Zhu Shuming Bao University of Michigan Ann ArborMIUSA Center for Geographical Analysis Harvard UniversityCambridgeMAUSA Geocomputation Center for Social Sciences Wuhan UniversityWuhanChina State Key Lab of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhanChina Collaborative Innovation Center of Geospatial Technology WuhanChina China Data Institute Ann ArborMIUSA

Geoportals have been the primary source of spatial information to researchers in diverse *** years have seen a growing trend to integrate spatial analysis and geovisual analytics inside *** could use the Geoportal to conduct basic analysis without offline *** practice,domain-specific analysis often requires researchers to integrate heterogeneous data sources,leverage new statistical models,or build their own customized *** tasks are increasingly being tackled with open source tools in programming languages such as Python or ***,it is unrealistic to incorporate the numerous open source tools in a Geoportal platform for data processing and *** work provides an exploratory effort to bridge Geoportals and open source tools through Python *** Geoportal demonstrated in this work is the Urban and Regional Explorer for China studies.A python package is provided to manipulate this platform in the local programming *** server side of the Geoportal implements a set of service endpoints that allows the package to upload,transform,and process user data and seamlessly integrate them into the existing datasets.A case study is provided that illustrated the use of this package to conduct integrated analyses of search engine data and baseline census *** work attempts a new direction in Geoportal development,which could further promote the transformation of Geoportals into online analytical workbenches.

关键词： Geoportal open source Python web GIS spatial analysis

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An open source Toolkit for Identifying Comparative Space-time Research Questions

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Chinese Geographical Science 2014年第3期24卷 348-361页

作者： YE Xinyue SHE Bing WU Ling ZHU Xinyan CHENG Yeqing Computational Social Science Lab & Department of Geography Kent State University State Key Lab of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University College of Criminal Justice Zhongnan University of Economics and Law Northeast Institute of Geography and Agroecology Chinese Academy of Sciences

Comparative space-time thinking lies at the heart of spatiotemporally integrated social sciences. The multiple dimensions and scales of socioeconomic dynamics pose numerous challenges for the application and evaluation of public policies in the comparative context. At the same time, social scientists have been slow to adopt and implement new spatiotemporally explicit methods of data analysis due to the lack of extensible software packages, which becomes a major impediment to the promotion of spatiotemporal thinking. The proposed framework will address this need by developing a set of research questions based on space-time-distributional features of socioeconomic datasets. The authors aim to develop, evaluate, and implement this framework in an open source toolkit to comprehensively quantify the changes and level of hidden variation of space-time datasets across scales and dimensions. Free access to the source code allows a broader community to incorporate additional advances in perspectives and methods, thus facilitating interdisciplinary collaboration. Being written in Python, it is entirely cross-platform, lowering transmission costs in research and education.

关键词： open source comparative spatiotemporally integrated social sciences

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A survey of open source data science tools

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International Journal of Intelligent Computing and Cybernetics 2015年第3期8卷 232-261页

作者： Panagiotis Barlas Ivor Lanning Cathal Heavey Enterprise Research Centre University of LimerickLimerickIreland

Purpose–Data science is the study of the generalizable extraction of knowledge from *** includes a variety of components and develops on methods and concepts from many domains,containing mathematics,probability models,machine learning,statistical learning,computer programming,data engineering,pattern recognition and learning,visualization and data warehousing aiming to extract value from *** purpose of this paper is to provide an overview of open source(OS)data science tools,proposing a classification scheme that can be used to study OS data science ***/methodology/approach–The proposed classification scheme is based on general characteristics,project activity,operational characteristics and data mining *** authors then use the proposed scheme to examine 70 identified open source *** this the authors provide insight about the current status of OS data science tools and reveal the state-of-the-art ***–The features of 70 OS tools are recorded based on the criteria of the four group characteristics,general characteristics,project activity,operational characteristics and data mining *** results came from the analysis of these features and are recorded ***/value–The contribution of this survey is development of a new classification scheme for examination and study of OS data science *** parallel,this study provides an overview of existing OS data science tools.

关键词： Information retrieval Image processing Data Data mining Knowledge acquisition Genetic algorithms Data science open source Data science tools

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open source Synthesis and Verification Tool for Fixed-to-Floating and Floating-to-Fixed Points Conversions

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Circuits and Systems 2016年第11期7卷 3874-3885页

作者： Semih Aslan Ekram Mohammad Azim Hassan Salamy Ingram School of Engineering Electrical Engineering Texas State University San Marcos Texas USA School of Engineering Electrical Engineering University of St. Thomas St. Paul Minnesota USA

An open source high level synthesis fixed-to-floating and floating-to-fixed conversion tool is presented for embedded design, communication systems, and signal processing applications. Many systems use a fixed point number system. Fixed point numbers often need to be converted to floating point numbers for higher accuracy, dynamic range, fixed-length transmission limitations or end user requirements. A similar conversion system is needed to convert floating point numbers to fixed point numbers due to the advantages that fixed point numbers offer when compared with floating point number systems, such as compact hardware, reduced verification time and design effort. The latest embedded and SoC designs use both number systems together to improve accuracy or reduce required hardware in the same design. The proposed open source design and verification tool converts fixed point numbers to floating point numbers, and floating point numbers to fixed point numbers using the IEEE-754 floating point number standard. This open source design tool generates HDL code and its test bench that can be implemented in FPGA and VLSI systems. The design can be compiled and simulated using open source Iverilog/GTKWave and verified using Octave. A high level synthesis tool and GUI are designed using C#. The proposed design tool can increase productivity by reducing the design and verification time, as well as reduce the development cost due to the open source nature of the design tool. The proposed design tool can be used as a standalone block generator or implemented into current designs to improve range, accuracy, and reduce the development cost. The generated design has been implemented on Xilinx FPGAs.

关键词： FPGA VLSI RTL Iverilog GTKWave OCTAVE HLS C open source

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Evaluation and Customization of Different open source Desktop GIS Software

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地理空间信息 2012年第2期10卷 28-31页

作者： QIU Ruqiong LI Bing Hubei Geomatics Information Center Wuhan 430071 China

This paper gave a general evaluation on existing three popular free and open source desktop GIS projects,according to the selected evaluation *** further the understanding of the open source software,this paper also p... 详细信息

关键词： open source free software Desktop GIS Python PyQT

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Poke And Delayed Drink Intertemporal Choice Task(POKE-ADDICT):An open-source behavioral apparatus for intertemporal choice testing in rodents

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Animal Models and Experimental Medicine 2023年第6期6卷 619-626页

作者： Andrea Stefano Moro Daniele Saccenti Alessia Seccia Mattia Ferro Antonio Malgaroli Jacopo Lamanna Department of Psychology Sigmund Freud UniversityMilanItaly Center for Behavioral Neuroscience and Communication(BNC) Vita-Salute San Raffaele UniversityMilanItaly Transcranial Magnetic Stimulation Unit Italian Psychotherapy ClinicsMilanItaly Faculty of Psychology Vita-Salute San Raffaele UniversityMilanItaly San Raffaele Turro IRCCS Ospedale San RaffaeleMilanItaly

Advancements in neuroscience research present opportunities and challenges,requiring substantial resources and *** address this,we describe here“Poke And Delayed Drink Intertemporal Choice Task(POKE-ADDICT)”,an open-source,versatile,and cost-effective apparatus for intertemporal choice testing in *** allows quantification of delay discounting(DD),a cross-species phenomenon observed in decision making which provides valuable insights into higher-order cognitive *** DD,the subjective value of a delayed reward is reduced as a function of the delay for its *** our apparatus,we implemented an effective intertemporal choice paradigm for the quantification of DD based on an adjusting delayed amount(ADA)algorithm using mango juice as a *** paradigm requires limited training,a few 3D-printed parts and inexpensive electrical components,including a Raspberry Pi control ***,it is compatible with several in vivo procedures and the use of nose pokes instead of levers allows for faster task *** the main application described here,the apparatus can be further extended to implement other behavioral tests and protocols,including standard operant *** conclusion,we describe a versatile and cost-effective design based on Raspberry Pi that can support research in animal behavior,decision making and,more specifically,delay discounting.

关键词： decision making delay discounting intertemporal choice open source

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A New Talent Cultivation Model Under open-source Environment:A Case Study at Zhejiang University

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计算机教育 2023年第12期 180-186页

作者： Chao Ni Jianwei Yin Li Chen the School of Software Engineering Zhejiang UniversityNingbo315048China

The open-source movement profoundly impacts the development of computer *** current requirements for postgraduate cultivation in Chinese universities mainly include publishing papers,applying for patents,winning awards,and conducting research projects,which demonstrate the capabilities of students when they graduate from ***,in today’s prevalent open-source culture,these types of assessments are still not comprehensive enough for postgraduate cultivation,especially for professional postgraduate *** this reason,Zhejiang University takes the lead in proposing educational reforms for postgraduate cultivation based on the open-source *** has implemented a new“trinity”mechanism(i.e.,open-source course,open-source training,and open-source capability evaluation)for graduate training centered on open source,serving as a novel supplement to the traditional methods of postgraduate *** a year of pilot operation,this new approach,deeply loved by teachers and students,has achieved good results and positive feedback.

关键词： open source Postgraduate cultivation Programming capability evaluation

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在网络传输协议SMB(Server Message Block)的应用中，网站的开源软件技术(open source)使用率不断上升

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信息方略 2008年第2期 93-93页

有大约1/3的中型公司正在建设开源化信息技术商店,而从开源软件中收益的公司数量远多于1/3。Linux的使用在增加,与此类似的还有其他的开源软件:数据管理系统软件、中间件,还有更为突

关键词：开源软件 Server Message Block 开放源代码软件网络传输协议 open source 网站 SMB

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软件专业教学方向应向open source领域适当倾斜

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中国科技博览 2010年第25期 147-147页

作者：张勇吉林工商学院计算机系信息管理教研室吉林长春130062

软件专业教学应当尽快摆脱对以微软为首的封闭源代码软件的严重依赖,转而向新兴的、更适合我国国情的open source(开放源代码)软件领域转移.

关键词： open source 开放源代码软件专业教学

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A computational fluid dynamics model for wind simulation:model implementation and experimental validation

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2012年第4期13卷 274-283页

作者： Zhuo-dong ZHANG Ralf WIELAND Matthias REICHE Roger FUNK Carsten HOFFMANN Yong LI Michael SOMMER Institute of Soil Landscape Research Leibniz-Centre for Agricultural Landscape Research(ZALF)Muencheberg 15374Germany Institute of Landscape System Analysis Leibniz-Centre for Agricultural Landscape Research(ZALF)Muencheberg 15374Germany Institute of Agricultural Environment and Sustainable Development Chinese Academy of Agricultural Sciences(CAAS)Beijing 100081China Institute of Earth and Environmental Science University of PotsdamPotsdam 14476Germany

To provide physically based wind modelling for wind erosion research at regional scale, a 3D computational fluid dynamics (CFD) wind model was developed. The model was programmed in C language based on the Navier-Stokes equations, and it is freely available as open source. Integrated with the spatial analysis and modelling tool (SAMT), the wind model has convenient input preparation and powerful output visualization. To validate the wind model, a series of experiments was con- ducted in a wind tunnel. A blocking inflow experiment was designed to test the performance of the model on simulation of basic fluid processes. A round obstacle experiment was designed to check if the model could simulate the influences of the obstacle on wind field. Results show that measured and simulated wind fields have high correlations, and the wind model can simulate both the basic processes of the wind and the influences of the obstacle on the wind field. These results show the high reliability of the wind model. A digital elevation model (DEM) of an area (3800 m long and 1700 m wide) in the Xilingele grassland in Inner Mongolia (autonomous region, China) was applied to the model, and a 3D wind field has been successfully generated. The clear imple- mentation of the model and the adequate validation by wind tunnel experiments laid a solid foundation for the prediction and assessment of wind erosion at regional scale.

关键词： Wind model Computational fluid dynamics (CFD) Wind erosion Wind tunnel experiments Spatial analysis andmodelling tool (SAMT) open source

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