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Exploiting big earth data from space - first experiences with the timescan processing chain

Big Earth Data 2018年第1期2卷 36-55页

作者： T.Esch s.Ureyen J.Zeidler A.metz-marconcini A.Hirner H.Asamer m.Tum m.Bottcher s.Kuchar V.svaton m.marconcini German Remote sensing Data Center(DFD) Earth Observation Center(EOC)German Aerospace Center(DLR)WeßlingGermany Brockmann Consult GmbH GeesthachtGermany IT4Innovations National supercomputing Center VsB Technical University of OstravaPorubaCzech Republic

The European sentinel missions and the latest generation of the United states Landsat satellites provide new opportunities for global environmental *** acquire imagery at spatial resolutions between 10 and 60 m in a temporal and spatial coverage that could before only be realized on the basis of lower resolution Earth observation data(>250 m).However,images gathered by these modern missions rapidly add up to data volume that can no longer be handled with standard work stations and software ***,this contribution introduces the Timescan concept which combines pre-existing tools to an exemplary modular pipeline for the flexible and scalable processing of massive image data collections on a variety of(private or public)computing *** Timescan framework covers solutions for data access to arbitrary mission archives(with different data provisioning policies)and data ingestion into a processing environment(EO2Data module),mission specific pre-processing of multi-temporal data collections(Data2Times module),and the generation of a final Timescan baseline product(Times2stats module)providing a spectrally and temporally harmonized representation of the observed ***,a Timescan layer aggregates the information content of hundreds or thousands of single images available for the area and time period of interest(*** to hundreds of TBs or even PBs of data)into a higher level product with significantly reduced *** first test,the Timescan pipeline has been used to process a global coverage of 452,799 multispectral Landsat–8 scenes acquired from 2013 to 2015,a global data-set of 25,550 Envisat AsAR radar images collected 2010–2012,and regional sentinel–1 and sentinel–2 collections of∼1500 images acquired from 2014 to *** resulting Timescan products have already been successfully used in various studies related to the large-scale monitoring of environmental processes and their temporal dynamics.

关键词： Earth observation sentinel landsat mass data high performance processing information and communication technology automation

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Hot deformation of mg-Y-Zn alloy with a low content of the LPsO phase studied by in-situ synchrotron radiation diffraction

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Journal of magnesium and Alloys 2020年第1期8卷 199-209页

作者： Klaudia Horváth Fekete Daria Drozdenko Jan Capek Kristián máthis Domonkos Tolnai Andreas stark Gerardo Garcés Patrik Dobron Department of Physics of materials Faculty of Mathematics and PhysicsCharles UniversityKe Karlovu 512116 PragueCzech Republic Nuclear Physics Institute of the CAs 25068ˇRežCzech Republic magnesium Research Center Kumamoto University2-39-1 Kurokami Chuo-ku860-8555 KumamotoJapan Laboratory for Neutron scattering and Imaging Paul Scherrer InstituteVilligen PSI5232Switzerland Institute of materials science Helmholtz-Zentrum GeesthachtMax-Planck Str.1GeesthachtD21502Germany Department of Physical metallurgy CENIM-CSICAvenida Gregorio del Amo 8E-28040 MadridSpain

The compressive deformation behavior of the extruded WZ42(mg98.5Y1Zn0.5 in at.%)magnesium alloy containing a low amount of long-period stacking ordered(LPsO)phase was studied by in-situ synchrotron radiation diffraction *** were conducted at temperatures between room temperature and 350℃.Detailed microstructure investigation was provided by scanning electron microscopy,particularly the backscattered electron imaging and electron backscatter diffraction *** results show that twinning lost its dominance and kinking of the LPsO phase became more pronounced with increasing deformation *** cracks of the LPsO phase and no debonding r at the interface between the LPsO phase and the mg matrix were observed at temperatures above 200℃.At 350℃,the LPsO phase lost its strengthening effect and the deformation of the alloy was mainly realized by the dynamic recrystallization of the mg matrix.

关键词： magnesium alloy LPsO phase Kinking High temperature synchrotron radiation diffraction

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Correcting distortions of thin-walled machined parts by machine hammer peening

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Chinese Journal of Aeronautics 2024年第6期37卷 439-453页

作者： Aitor mADARIAGA mikel CUEsTA Gorka ORTIZ-DE-ZARATE Eneko sAENZ-DE-ARGANDONA Denis sORIANO michael B.PRImE Pedro Jose ARRAZOLA Department of materials University of ManchesterOxford RoadManchester M139PLUnited Kingdom mechanical and Industrial Production Department Faculty of EngineeringMondragon UnibertsitateaArrasate 20500Spain Los Alamos National Laboratory Los AlamosNew MexicoUSA

Thin-walled aerostructural components frequently get distorted after the machining *** to correct distortions or eventually rejecting parts significantly increases the *** paper proposes a new approach to correct distortions in thin-walled components by strategically applying hammer peening on target surfaces of a machined *** alloy 7475-T7351 was chosen for this *** study was divided in two ***,the residual stresses(Rs)induced by four different pneumatic hammer peening conditions(modifying the stepover distance and initial offset)were characterised in a test coupon,and one of the conditions was selected for the next *** the second stage,a FEm model was used to predict distortions caused by machining in a representative ***,the Rs induced by hammer peening were included in an FEm model to define two hammer peening strategies(varying the coverage area)to analyse the capability to reduce *** workpieces were machined and then treated with the simulated hammer peening strategies for experimental *** in the test coupon showed that pneumatic hammer peening can generate high compressive Rs(-50 to350 mPa)up to 800 lm depth,with their magnitude increasing with a reduced stepover *** of hammer peening over 4% of the surface of the representative workpiece reduced the machininginduced distortions by 37%,and a coverage area of 100% led to and overcorrection by a factor of *** confirms that hammer peening can be strategically applied(in target areas and changing the percentage of coverage)to correct low or severe distortions.

关键词： Aeronautics machining,Hammer Peening Aluminium alloy Distortions Residual stress

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Coal mine spoil-Water Interaction——Release mechanism of Clay minerals

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Chinese science Bulletin 1994年第24期39卷 2053-2055页

作者：党志万国江 m.J.Haigh s.F.Watts state Key Laboratory of Environmental Geochemistry Institute of Geochemistry Academia SinicaGuiyang 550002 PRC school of Biological and molecular sciences Oxford Brookes UniversityOxford OX3 OBPUK

The south Wales Coalfield has been affected by more than 200 years of industrialdevelopment based on coal mine. Today, surface coal mine affects a 100-km belt in theHeads of the Valley region. Large areas of land are classified as 'reclaimed' land after coal mining. However, there is increasing concem about both the quality and the sustainability of this reclaimed land. Large tracts of 'reclaimed' land are suffering severe degradation runoff, erosion gullies, waterlogging through most of the year, drought during the short summer period of soil moisture deficit, and the consequent loss of vegetation cover.

关键词： coal mine spoil-water interaction day mineral release mechanism.

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Robust Controller synthesis and Analysis in Inverter-Dominant Droop-Controlled Islanded microgrids

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IEEE/CAA Journal of Automatica sinica 2021年第8期8卷 1401-1415页

作者： s.mohsen Azizi school of Applied Engineering and Technology and the Department of Electrical and Computer EngineeringNew Jersey Institute of TechnologyNJ 07102 USA

This work investigates the problem of controller design for the inverters in an islanded ***-synthesis controllers and local droop controllers are designed to regulate the output voltages of inverters and share power among them,*** designed controllers alleviate the need for additional sensors to measure the states of the system by relying only on output *** is shown that the designed-synthesis controller properly damps resonant oscillations,and its performance is robust to the control-loop time delay and parameter *** stability of a droop-controlled islanded microgrid including multiple distributed generation(DG)units is analyzed by linearizing the nonlinear power flow model around the nominal operating point and applying theorems from linear *** is indicated that the droop controller stabilizes the microgrid system with dominantly inductive tie-line impedances for all values of resistive-inductive loads,while for the case of resistive-capacitive loads the stability is conditioned on an upper bound on the load *** robust performance of the designed-synthesis controller is studied analytically,compared with the similar analysis in an control(benchmark)framework,and verified by simulations for a four DG benchmark ***,the robustness of the droop controllers is analyzed by monte Carlo simulations in the presence of local voltage fluctuations and phase differences among neighboring DGs.

关键词： Droop control inverter microgrid monte Carlo simulation robust control μ-synthesis

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Localization of urea transporter B in the developing bovine rumen

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Animal Nutrition 2022年第3期10卷 216-222页

作者： Chongliang Zhong Tamsin Lyons Orla Heussaff Evelyn Doyle Eoin O'Hara sinead m.Waters David Kenny Gavin s.stewart school of Biology and Environmental science University College DublinBelfieldDublin 4Ireland Animal and Bioscience Research Department Animal and Grassland Research and Innovation CentreTeagascGrangeCounty MeathIreland Department of Agriculture Foodand Nutritional SciencesUniversity of AlbertaEdmontonAlbertaCanada

Urea nitrogen secreted from blood to rumen is a crucial factor shaping the symbiotic relationship between host ruminants and their microbial *** of urea across rumen epithelia is facilitated by urea transporter B(UT-B),but the long-term regulation of these proteins remains *** ruminal function develops over a period of months,the developing rumen is an excellent model with which to investigate this *** rumen epithelium samples of calves from birth to 96 d of age,this study performed immunolocalization studies to localize and semi-quantify UT-B protein *** expected,preliminary experiments confirmed that ruminal monocarboxylate transporter 1(mCT1)short chain fatty acid transporter protein abundance increased with age(Pstigation revealed that ruminal UT-B was present in the first few weeks of life and initially detected in the basolateral membrane of stratum basale *** the next 2 months,UT-B staining spread to other epithelial layers and semi-quantification indicated that UT-B abundance significantly increased with age(Pse changes were in line with the development of rumen function after the advent of solid feed intake and weaning,exhibiting a similar pattern to both mCT1 transporters and papillae *** study therefore confirmed age-dependent changes of in situ ruminal UT-B protein,adding to our understanding of the long-term regulation of ruminal urea transporters.

关键词： UT-B Immunolocalization Rumen Bovine Development

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Energy Prediction in IoT systems Using machine Learning models

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Computers, materials & Continua 2023年第4期75卷 443-459页

作者： s.Balaji s.Karthik Department of ECE SRM Institute of Science and TechnologyVadapalani CampusNo1 Jawaharlal Nehru RoadVadapalani600026TNIndia

The Internet of Things (IoT) technology has been developed fordirecting and maintaining the atmosphere in smart buildings in real time. Inorder to optimise the power generation sector and schedule routine maintenance,it is crucial to predict future energy demand. Electricity demandforecasting is difficult because of the complexity of the available demandpatterns. Establishing a perfect prediction of energy consumption at thebuilding’s level is vital and significant to efficiently managing the consumedenergy by utilising a strong predictive model. Low forecast accuracy is justone of the reasons why energy consumption and prediction models havefailed to advance. Therefore, the purpose of this study is to create an IoTbasedenergy prediction (IoT-EP) model that can reliably estimate the energyconsumption of smart buildings. A real-world test case on power predictionsis conducted on a local electricity grid to test the practicality of the *** proposed (IoT-EP) model selects the significant features as input neurons,the predictable data is selected as output nodes, and a multi-layer perceptronis constructed along with the features of the Convolution Neural Network(CNN) algorithm. The analysis of the proposed IoT-EP model has higheraccuracy of 90%, correlation of 89%, and variance of 16% in less training timeof 29.2 s, and with a higher prediction speed of 396 (observation/sec). Whencompared to existing models, the results showed that the proposed (IoT-EP)model outperforms with a satisfactory level of accuracy in predicting energyconsumption in smart buildings.

关键词： machine learning wireless networks internet of things energy prediction

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An ACO Look-Ahead Approach to QOs Enabled FaultTolerant Routing in mANETs

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China Communications 2015年第8期12卷 93-110页

作者： surendran. s Prakash. s Professor Department of Information TechnologyTagore Engineering College Professor Department of Electronics and Communication EngineeringJerusalem College of Engineering

mANET routing is critical and routing decision should be made sooner before the node leaves the *** decisions always compensate network *** addition,most mANET routing protocols assume a friendly and cooperative environment,and hence are vulnerable to various *** and Reputation would serve as a major solution to these *** the network characteristics and choosing right routing decisions at right times would be a significant *** this work,we have done an extensive survey of fault tolerant protocols and ant colony algorithms applied to routing in *** propose a Qos constrained fault tolerant ant lookahead routing algorithm which attempts to identify valid route and look-ahead route pairs which might help in choosing the alternate path in case of valid route *** results prove that the proposed algorithm takes better routing decisions with 20-30 percent improvement compared with existing ant colony algorithms.

关键词： routing fault-tolerant ant colonyalgorithms mANETs Qos trust reputation

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Butterfly-plant interactions and body size patterns along an elevational gradient in the manang region of central Nepal

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Journal of mountain science 2020年第5期17卷 1115-1127页

作者： Bimal Raj sHREsTHA Binu TImsINA Zuzana müNZBERGOVá Tomás DOsTáLEK Prakash GAUDEL Tej *** maan B.ROKAYA Central Department of Zoology Tribhuvan UniversityKathmandu44600Nepal Department of Institute of Environmental studies/Botany Faculty of ScienceCharles UniversityBenatska 212801 PragueCzech Republic Department of Biodiversity Research Global Change Research CentreCzech Academy of SciencesBelidla 4a60300 BrnoCzech Republic Institute of Botany The Czech Academy of SciencesZamek 125243 PruhoniceCzech Republic

Butterflies are widely studied due to their key ecosystem *** this reason,they are used in ecosystem assessment,formulating conservation plans and in raising the environmental *** of different factors affecting diversity of butterflies is important for their effective *** this study,we investigated abiotic and biotic factors affecting species richness and community composition of butterflies along an elevational gradient in manang region,central *** also tested if butterfly species follow the Bergmann’s rule.A total of 57 butterfly species belonging to 39 genera and 8 families were recorded in the study *** of a total of 127 plant species identified in the study region,only 67 plant species were visited by butterflies as nectar *** richness of butterflies increased with increasing *** richness was significantly higher in places with shrubs compared to other places and also in autumn than in *** richness of butterflies also depended on composition of plant species occurring at the *** species composition varied among sampling *** was also determined by habitat type,elevation,sampling time,plant species and interactions of elevation×*** relationship between butterfly size and elevation was in the opposite direction than expected according to the Bergmann’s *** conclusion,protection of butterfly diversity can only be achieved by protecting different habitats across the diverse physiography of the region and different plant species,in particular herbs and *** results do not support the Bergmann’s rule for butterflies along an elevational gradient in our region.

关键词： Lepidoptera microhabitat species richness species composition Bergmann’s rule

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肝细胞癌患者的症状和症状群及常用工具的整合性综述

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International Journal of Nursing sciences 2024年第1期11卷 66-75,I0002页

作者： Thitiporn Pathomjaruwat Yaowarat matchim Jane mArmer Research Unit in Palliative Care for Adults and Older Adults Faculty of NursingThammasat UniversityPathum ThaniThailand mU sinclair school of Nursing University of MissouriColumbiaUSA

目的综合现有知识,识别肝细胞癌(hepatocellular carcinoma,HCC)患者的症状和症状群,以及相关评估工具,以最大限度地改善症状管理。方法采用Whittemore和Knafl提出的整合性综述方法框架,在Pubmed..scienceDirect、scopus、CINAHL和ThaiJO等数据库中对文献进行系统检索。检索文献发表时间限定为2005年一2022年,仅纳人经过同行评审及有英文摘要的文献。由2名研究员独立进行文献的筛选、提取和分析。结果共纳入14篇文献。分为3个主题:HCC患者的症状.症状评估和症状群。疲劳、乏力、胃痛或腹痛/腹胀、食欲不振、味觉改变、睡眠障碍、苦恼和悲伤是HCC患者最常见的症状。患者症状与肿瘤分期和治疗方法有关。常用的症状评估工具包括5种类型:HCC特异性症状评估癌症一般症状评估、非症状构念测量、特定症状(如疲劳、睡眠障碍、焦虑和抑郁)测量及结合临床检查的症状评估等5种。HCC患者的症状群分为5类:疼痛相关症状、胃肠道症状、神经心理症状和感觉症状.肝功能异常相关症状及其他。结论该综述对HCC患者症状、症状评估和症状群相关知识进行了综合。尽管目前有多种评估工具,但没有一种能涵盖HCC患者的所有症状。建议今后的研究纳入更大的同质化的样本,以便更准确地评估测量工具的效能,避免在将症状分类为症状群时出现歧义,提高症状管理的有效性。

关键词：肝细胞癌肝癌综述症状评估症状群

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