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Crop type mapping using LiDAr,Sentinel-2 and aerial imagery with machine learning algorithms

第二届植物分子育种国际会议

作者： L.Herselman O.A.Philippou Z.A.Pretorius r.prins Department of Plant Sciences University of the Free StatePO Box 339Bloemfontein9300South Africa Department of Plant Sciences University of the Free StatePO Box 339Bloemfontein9300South Africa Department of Plant Sciences University of the Free StatePO Box 339Bloemfontein9300South Africa Department of Plant Sciences University of the Free StatePO Box 339Bloemfontein9300South Africa CenGen （Pty） Ltd78 Fairbairn Street Worcester6850South Africa

＜正＞A ‘Kariega×Avocet S’ partial linkage map has made a significant contribution to understanding the genetics underlying the adult plant resistance （APr） to stripe rust, caused by Puccinia striiformis f. sp. t... 详细信息

关键词： Triticum aestivum Doubled haploids Puccinia striiformis f. sp. tritici Phenotypic and marker data

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Geo-Spatial Information Science 2021年第2期24卷 215-227,I0003页

作者： Adriaan Jacobus prins Adriaan Van Niekerk Department of Geography&Environmental Studies Stellenbosch UniversityStellenboschSouth Africa

LiDAr data are becoming increasingly available,which has opened up many new *** such application is crop type *** crop type maps are critical for monitoring water use,estimating harvests and in precision *** traditional approach to obtaining maps of cultivated fields is by manually digitizing the fields from satellite or aerial imagery and then assigning crop type labels to each field-often informed by data collected during ground and aerial ***,manual digitizing and labeling is time-consuming,expensive and subject to human *** remote sensing methods is a cost-effective alternative,with machine learning gaining popularity for classifying crop *** study evaluated the use of LiDAr data,Sentinel-2 imagery,aerial imagery and machine learning for differentiating five crop types in an intensively cultivated *** combinations of the three datasets were evaluated along with ten machine *** classification results were interpreted by comparing overall accuracies,kappa,standard deviation and *** was found that LiDAr data successfully differentiated between different crop types,with XGBoost providing the highest overall accuracy of 87.8%.Furthermore,the crop type maps produced using the LiDAr data were in general agreement with those obtained by using Sentinel-2 data,with LiDAr obtaining a mean overall accuracy of 84.3%and Sentinel-2 a mean overall accuracy of 83.6%.However,the combination of all three datasets proved to be the most effective at differentiating between the crop types,with rF providing the highest overall accuracy of 94.4%.These findings provide a foundation for selecting the appropriate combination of remotely sensed data sources and machine learning algorithms for operational crop type mapping.

关键词： LiDAr multispectral imagery sentinel-2 machine learning crop type classification per-pixel classification

THE PErIODIC CAPACITATED ArC rOUTING PrOBLEM LINEAr PrOGrAMMING MODEL, METAHEUrISTIC AND LOWEr BOUNDS

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Systems Science and Systems Engineering 2004年第4期13卷 423-435页

作者： Nacima LABADI Christian prins FrE CNrS 2732 ISTIT-OSI University of Technology of Troyes 12 rue Marie Curie BP2060 10010 Troyes France FRE CNRS 2732 ISTIT-OSI University of Technology of Troyes 12 rue Marie Curie BP2060 10010 Troyes France

The Periodic Capacitated Arc routing Problem (PCArP) generalizes the well known NP-hard Capacitated Arc routing Problem (CArP) by extending the single period to multi-period horizon. The Capacitated Arc routing Problem (CArP) is defined on an undirected network in which a fleet of identical vehicles is based at a depot node. A subset of edges, called tasks, must be serviced by a vehicle. The CArP consists of determining a set of feasible vehicle trips that minimizes the total cost of traversed edges. The PCArP involves the assignment of tasks to periods and the determination of vehicles trips in each period, to minimize the total cost on the whole horizon. This new problem arises in various real life applications such as waste collection, mail delivery, etc. In this paper, a new linear programming model and preliminary lower bounds based on graph transformation are proposed. A meta-heuristic approach - Scatter Search (SS) is developed for the PCArP and evaluated on a large variety of instances.

关键词： PCArP linear programming lower bound transformed graph scatter search

Distributional congruence of mammalian herbivores in the Trans-Himalayan Mountains

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Current Zoology 2013年第1期59卷 116-124页

作者： Tsewang NAMGAIL Sipke E. van WIErEN Herbert H.T. prins resource Ecology Group Wageningen University Droevendaalsesteeg 3a 6708 PB Wageningen The Netherlands U.S. Geological Survey Las Vegas Field Station 160 N Stephanie Street Henderson 89074 NV USA

Large-scale distribution and diversity patterns of mammalian herbivores, especially less charismatic species in alpine environments remain little understood. We studied distributional congruence of mammalian herbivores in the Trans-Himalayan region of Ladakh to see if the distributions of less prominent and smaller herbivores can be determined from those of larger and more prominent herbivores like ungulates. Using a similarity index, we assessed shared distributions of species in 20x20 km2 grid-cells in an area of about 80,000 km2. We used the Unweighted Pair-Group Method with Arithmetic Average （UPGMA） to classify mammalian herbivores into groups with similar distributions. We then used the G-test of independence to look for statistical significance of the groups obtained. We identified six groups of mammalian herbivores with distributions more similar than ex- pected at random. The largest group was composed of nine species whereas the other large group comprised six species. Canonical Correspondence Analysis （CCA）, used to relate the groups with environmental features, showed that the largest group occurred in higher and flatter areas, while the other large group occurred in lower and steeper areas. Large herbivores like ungulates can be used as surrogate for less prominent small herbivores while identifying areas for latter＇s protection in the inaccessible mountainous re- gions of the Trans-Himalaya [Current Zoology 59 （1）： 116-124, 2013].

关键词： Mountain ungulates rodents lagomorphs UPGMA biogeography Trans-Himalaya

Toward more reliable stability measurements in stance: recommendations for number of measurements, foot position and feedback——a cross-sectional study among servicemen

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Military Medical research 2020年第2期7卷 199-208页

作者： Saskia Maria Theresia van der Heijden Maarten reinders prins Peter van der Wurff Physical Therapy Sciences Program in Clinical Health SciencesUniversity Medical Center Utrecht3584CX UtrechtThe Netherlands research and Development Military Rehabilitation Center AardenburgKorte Molenweg 33941PW DoomThe Netherlands Department of Human Movement Sciences Faculty of Behavioural and Movement SciencesVrije Universiteit Amsterdam and Amsterdam Movement Sciences1081BT AmsterdamThe Netherlands Institute for Human Movement Studies HU University of Applied Sciences Utrecht3584CS UtrechtThe Netherlands

Background:In the military,insufficient postural stability is a risk factor for developing lower extremity *** stability training programs are effective in preventing these ***,an objective method for the measurement of postural stability in servicemen is *** primary objective of this study was to assess the influence of the number of repetitions,different foot positions and real-time visual feedback on postural stability,as well as their effects on the intrasession reliability of postural stability measurements in *** secondary objective was to assess the concurrent validity of the ***:Twenty healthy servicemen between 20 and 50 years of age and in active duty were eligible for this quantitative,cross-sectional *** measurements took place on a force plate,measuring the mean velocity of the center of *** participants were asked to stand as still as possible in three different foot positions(wide stance,small stance,and on one leg),five times each for 45 s each time,and the measurements were performed with and without real-time visual ***:We observed a significant main effect of foot position(Pr repetition number(P=0.915).Postural stability decreased in the more challenging foot *** ICC estimates varied from 0.809(one repetition in wide stance)to 0.985(five repetitions on one leg).The common variance(r2)between different foot positions without feedback varied between 0.008(wide stance)and ***:To yield reliable data,wide-stance measurements should be conducted three times,and small-stance measurements and measurements on one leg should be conducted two *** scores of a measurement in a particular foot position cannot predict the scores of measurements in other foot positions.

关键词： Postural stability Center of Pressure Servicemen Intrasession reliability Concurrent validity

Improving the quantification of waterfowl migration with remote sensing and bird tracking

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Science Bulletin 2015年第23期60卷 1984-1993页

作者： Yali Si Qinchuan Xin Herbert H.T.prins Willem F.de Boer Peng Gong Ministry of Education Key Laboratory for Earth System Modeling Center for Earth System Science Tsinghua University Joint Center for Global Change Studies resource Ecology Group Wageningen University

Accurately quantifying waterfowl migration patterns is pertinent to monitor ecosystem health and control bird-borne infectious diseases. In this review, we summarize the current understanding of the environmental mechanisms that drive waterfowl migration and then investigate the effect of intra- and inter-annual change in food supply and temperature(e.g., climate change) on their migration patterns. recent advances in remote sensing and animal tracking techniques make it possible to monitor these environmental factors over a wide range of scales and record bird movements in detail. The synergy of these techniques will facilitate substantial progress in our understanding of the environmental drivers of bird migration. We identify prospects for future studies to test existing hypotheses and develop models integrating up-todate knowledge, high-resolution remote sensing data and high-accuracy bird tracking data. This will allow us to predict when waterfowl will be where, in response to shortand long-term global environmental change.

关键词： Waterfowl migration · Environmentaldrivers · Phenology · Stopover ·remote sensing ·Bird tracking

Comparison of Extrapolation and Interpolation Methods for Estimating Daily Photosynthetically Active radiation(PAr)——A Case Study of the Poyang Lake National Nature reserve,China

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Geo-Spatial Information Science 2010年第4期13卷 235-242页

作者： WU Guofeng Jan de Leeuw Andrew K. Skidmore LIU Yaolin Herbert H. T. prins School of resource and Environmental Science Wuhan University 129 Luoyu Road Wuhan 430079 China Key Laboratory of Geographic Information System of the Ministry of Education Wuhan University 129 Luoyu Road Wuhan 430079 China International Livestock research Institute (ILrI) P. O. Box 30709 Nairobi 00100 Kenya Department of Natural resources International Institute for Geo-Information Science and Earth Observation P. O. Box 6 Hengelosestraat 99 7500 AA Enschede the Netherlands resource Ecology Group Department of Environmental Sciences Wageningen University Droevendaalsesteeg 3A 6708 PB Wageningen the Netherlands

Measurements of photosynthetically active radiation （PAr）, which are indispensable for simulating plant growth and productivity, are generally very scarce. This study aimed to compare two extrapolation and one interpolation methods for estimating daily PAr reaching the earth surface within the Poyang Lake national nature reserve, China. The daily global solar radiation records at Nanchang meteorological station and daily sunshine duration measurements at nine meteorological stations around Poyang Lake were obtained to achieve the objective. Two extrapolation methods of PArs using recorded and estimated global solar radiation at Nanchang station and three stations （Yongxiu, Xingzi and Duchang） near the nature reserve were carried out, respectively, and a spatial interpolation method combining triangulated irregular network （TIN） and inverse distance weighting （IDW） was imple- mented to estimate daily PAr. The performance evaluation of the three methods using the PArs measured at Dahuchi Conservation Station （day number of measurement = 105 days） revealed that：（1） the spatial interpolation method achieved the best PAr estima- tion （r2 - 0.89, s.c. = 0.99, F= 830.02, P 〈 0.001 ）; （2） the extrapolation method from Nanchang station obtained an unbiased result （r2 = 0.88, s.c. = 0.99, F = 745.29, P 〈 0.001）; however, （3） the extrapolation methods from Yongxiu, Xingzi and Duchang stations were not suitable for this specific site for their biased estimations. Considering the assumptions and principles supporting the extrapolation and interpolation methods, the authors conclude that the spatial interpolation method produces more reliable results than the extrapolation methods and holds the greatest potential in all tested methods, and more PAr measurements should be recorded to evaluate the seasonal, yearly and spatial stabilities of these models for their application to the whole nature reserve of Poyang Lake.

关键词： photosynthetically active radiation (PAr) extrapolation interpolation triangulated irregular network (TIN) inverse distance weighting (IDW)

Book review on Edible insects: Future prospects for food and feed security

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Advances in Entomology 2014年第1期2卷 47-48页

作者： Jurate De prins Entomology Section Royal Museum for Central Africa Tervuren Belgium

Book review on Edible insects: Future prospects for food and feed

关键词： Edible insects Book review

The Periodic Capacitated Arc routing Problem: Linear Programming Model, Metaheuristic and Lower Bounds

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The Periodic Capacitated Arc Routing Problem: Linear Program...