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An integrated approach to site-specific management zone delineation

Frontiers of Agricultural Science and Engineering 2018年第4期5卷 432-441页

作者： Yuxin MIAO David J.MULLA pierre c.robert Precision Agriculture center Department of SoilWater and ClimateUniversity of Minnesota

Dividing fields into a few relatively homogeneous management zones(MZs) is a practical and costeffective approach to precision agriculture. There are three basic approaches to MZ delineation using soil and/or landscape properties, yield information, and both sources of information. The objective of this study is to propose an integrated approach to delineating site-specific MZ using relative elevation, organic matter, slope, electrical conductivity, yield spatial trend map, and yield temporal stability map(ROSE-YSTTS) and evaluate it against two other approaches using only soil and landscape information(ROSE) or clustering multiple year yield maps(cMYYM). The study was carried out on two no-till corn-soybean rotation fields in eastern Illinois, USA. Two years of nitrogen(N) rate experiments were conducted in Field B to evaluate the delineated MZs for site-specific N management. It was found that in general the ROSE approach was least effective in accounting for crop yield variability(8.0%–9.8%), while the cMYYM approach was least effective in accounting for soil and landscape(8.9%–38.1%), and soil nutrient and pH variability(9.4%–14.5%). The integrated ROSE-YSTTS approach was reasonably effective in accounting for the three sources of variability(38.6%–48.9%, 16.1%–17.3% and 13.2%–18.7% for soil and landscape, nutrient and pH, and yield variability, respectively), being either the best or second best approach. It was also found that the ROSE-YSTTS approach was effective in defining zones with high,medium and low economically optimum N rates. It is concluded that the integrated ROSE-YSTTS approach combining soil, landscape and yield spatial-temporal variability information can overcome the weaknesses of approaches using only soil, landscape or yield information,and is more robust for MZ delineation. It also has the potential for site-specific N management for improved economic returns. More studies are needed to further evaluate their appropriateness for precision N

关键词： economically optimum nitrogen rate fuzzy cluster analysis precision nitrogen management site-specific management soil landscape property yield map

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Reactivation of latent tuberculosis with TNF inhibitors: critical role of the beta 2 chain of the IL-12 receptor

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cellular & Molecular Immunology 2021年第7期18卷 1644-1651页

作者： Marie robert pierre Miossec Department of clinical Immunology and Rheumatology and immunogenomics and inflammation research unitUniversity of LyonHôpital Edouard HerriotLyonFrance

Tumor necrosis factor(TNF)inhibitors have improved a lot the treatment of numerous diseases,with the well-known example of rheumatoid arthritis(RA).In the early 2000s,postmarketing data quickly revealed an alarming number of severe tuberculosis(TB)under such *** findings were consistent with previous results in mice where TNF is essential for lymph node formation and granuloma *** effects of TNF inhibition on RA synovium structure are very similar to those on granuloma,with changes in cellular interactions,cytokine,and chemokine *** addition to the role of TNF in granuloma,the interleukin(IL)-12/interferon(IFN)-γpathway is required for an efficient host defense against *** and secondary immunodeficiencies affecting this pathway lead to severe bacillus calmette-Guérin(BcG)reaction or full *** chronic inflammation as in RA induces a systemic Th1 defect that predisposes to TB through specific downregulation of the IL-12Rß2 *** TNF inhibitors are initiated,this transiently increases this risk of TB,through effects on cellular interactions in a latent TB *** a later stage,when a better control disease activity is obtained,the risk of TB is reduced but not *** the clear benefit from TNF inhibition,latent TB infection screening at baseline is essential for an optimal safety.

关键词： tuberculosis TNF inhibition rheumatoid arthritis cytokines

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A Mode-Switching Motion control System for Reactive Interaction and Surface Following Using Industrial Robots

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IEEE/cAA Journal of Automatica Sinica 2018年第3期5卷 670-682页

作者： Danial Nakhaeinia pierre Payeur robert Laganière School of Electrical Engineering and computer Science University of Ottawa

This work proposes a sensor-based control system for fully automated object detection and exploration(surface following) with a redundant industrial robot. The control system utilizes both offline and online trajectory planning for reactive interaction with objects of different shapes and color using RGBD vision and proximity/contact sensors feedback where no prior knowledge of the objects is available. The RGB-D sensor is used to collect raw 3D information of the environment. The data is then processed to segment an object of interest in the scene. In order to completely explore the object, a coverage path planning technique is proposed using a dynamic 3D occupancy grid method to generate a primary(offline) trajectory. However, RGB-D sensors are very sensitive to lighting and provide only limited accuracy on the depth measurements. Therefore, the coverage path planning is then further assisted by a real-time adaptive path planning using a fuzzy self-tuning proportional integral derivative(PID)controller. The latter allows the robot to dynamically update the 3D model by a specially designed instrumented compliant wrist and adapt to the surfaces it approaches or touches. A modeswitching scheme is also proposed to efficiently integrate and smoothly switch between the interaction modes under certain conditions. Experimental results using a cRS-F3 manipulator equipped with a custom-built compliant wrist demonstrate the feasibility and performance of the proposed method.

关键词： Adaptive control fuzzy-PID controller manipulator control motion planning surface following

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Sediment load calculations from point measurements in sand-bed rivers

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International Journal of Sediment Research 2015年第1期30卷 1-12页

作者： Seema c.SHAH-FAIRBANK pierre Y JULIEN Department of civil Engineering California State Polytechnic University Department of civil and Environmental Engineering Colorado State University

Point velocity and suspended sediment concentration measurements are used to calculate the total sediment discharge in sand-bed *** with the Series Expansion of the Modified Einstein Point Procedure（SEMEPP） depend on grain diameter d;and settling velocity ω,flow depth h,shear velocity u*,and sampling depth h;.This procedure extends the applicability of the Modified Einstein Procedure（MEP） by using point sediment concentration and velocity *** procedure is tested using the laboratory data from coleman,and field measurements from the Enoree,Middle Rio Grande and Mississippi *** on 801 point measurements over 124 verticals at flow depths ranging from 0.17 m to 33.5 m and sediment concentrations less than 0.1 kg L;,the accuracy of the calculations depends on u*/ω and h;/d;.Point measurement techniques like SEMEPP are well-suited when u*/ω> 5 where at least 60%of the total sediment load is measured when 90%of the flow depth is *** determination of sediment discharge from point measurements is most accurate in deep rivers when h;/d;> *** u*/ω>*** measurements are not well-suited for shallow rivers and laboratory flumes where h< 0.5 m and when u*/ω< 2.

关键词： Point measurements concentration profiles Velocity profiles Total sediment load Modified Einstein Procedure

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Biomarkers in Barrett's esophagus and esophageal adenocarcinoma:Predictors of progression and prognosis

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World Journal of Gastroenterology 2010年第45期16卷 5669-5681页

作者： chin-Ann J Ong pierre Lao-Sirieix Rebecca c Fitzgerald MRc cancer cell Unit Hutchison-MRC Research CentreCambridgeCB20XZUnited Kingdom

Barrett’s esophagus is a well-known premalignant lesion of the lower esophagus that is characterized by intestinal metaplasia of the squamous epithelium. It is clinically important due to the increased risk (0.5% per annum) of progression to esophageal adenocarcinoma (EA), which has a poor outcome unless diagnosed early. The current clinical management of Barrett’s esophagus is hampered by the lack of accurate predictors of progression. In addition, when patients develop EA, the current staging modalities are limited in stratifying patients into different prognostic groups in order to guide the optimal therapy for an individual patient. Biomarkers have the potential to improve radically the clinical management of patients with Barrett’s esophagus and EA but have not yet entered mainstream clinical practice. This is in contrast to other cancers like breast and prostate for which biomarkers are utilized routinely to inform clinical decisions. This review aims to highlight the most promising predictive and prognostic biomarkers in Barrett’s esophagus and EA and to discuss what is required to move the field forward towards clinical application.

关键词： Barrett’s esophagus Esophageal adenocar cinoma Esophageal dysplasia Prognosis

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Ornamental feathers in cretaceous Burmese amber:resolving the enigma of rachis-dominated feather structure

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Journal of Palaeogeography 2019年第1期8卷 1-18页

作者： Lida Xing pierre cockx Ryan c.McKellar Jingmai O’connor State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences (Beijing) School of the Earth Sciences and Resources China University of Geosciences (Beijing) Royal Saskatchewan Museum Biology Department University of Regina Department of Ecology & Evolutionary Biology University of Kansas Institute ofVertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences

Over the last 20 years, compression fossils of feathers surrounding dinosaurs have greatly expanded our understanding of the origin and evolution of feathers. One of the most peculiar feather morphotypes discovered to date are rachis dominated feathers(RDFs), which have also been referred to as proximally ribbon-like pennaceous feathers(PRPFs). These elongate feathers are only found in the tail plumage, typically occurring in pairs with both streamer(not proximally ribbon-like) and racket-plume morphologies recognized. Here we describe a large sample set of isolated and paired RDFs from Upper cretaceous Burmese amber(～ 99 Ma). Amber preserves the finest details of these fragile structures in three dimensions, demonstrating that RDFs form a distinct feather morphotype with a ventrally open rachis, and with significant variability in pigmentation, microstructure, and symmetry.

关键词： Enantiornithes confuciusornithiformes Fossil feather Myanmar Ornamental feather

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农业信息技术与精确农业的发展

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农业工程学报 2001年第2期17卷 9-11页

作者：彭望禄 pierre robert 程惠贤美国明尼苏达大学土壤水及气候系

介绍了美国精确农业发展现状及当前进行的主要工作 ,阐述精确农业就是信息农业的概念。着重介绍 SS-cM(根据田间具体情况作物管理系统 )系统和 Yield Map产量图在精确农业发展中的作用及 GIS与精确农业的不可分关系。

关键词：精确农业 SScM 产量图 GIS 美国农业信息技术

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Multi-carbohydrase enzymes improve feed energy in broiler diets containing standard or low crude protein

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Animal Nutrition 2021年第2期7卷 496-505页

作者： Sosthene Musigwa Natalie Morgan robert A.Swick pierre cozannet Sarbast K.Kheravii Shu-Biao Wu School of Environmental and Rural Science University of New EnglandArmidaleNSW2351Australia Adisseo France SAS 92160AntonyFrance

This study evaluated the effect of multi-carbohydrase(Mc)on energy and nitrogen(N)balance and gene expression in broilers fed diets with different crude protein(cP)*** study employed a 2×2 factorial arrangement of *** factors were presence or absence of Mc,and standard(ScP)or low(LcP)dietary cP concentration.A 3-phase feeding program was used,including starter(0 to 7 d),grower(8 to 17 d)and finisher(18 to 28 d)*** study was undertaken in closed calorimetry *** of the 4 dietary treatments was replicated 8 times in total across 2 runs,with 2 birds per replicate(n=64).Data for energy partitioning and N balance were collected from d 25 to *** d 28,birds were euthanized to collect muscle and intestinal tissue samples for gene *** results showed that the Mc increased apparent metabolizable energy(AME,Pced the feed conversion ratio(FcR,Pcorrelated with feed AME and NE(r=0.541,Pctively),suggesting that feed energy augmented with increased fat *** ATP synthase subunit alpha(ATPSA1W)gene expression had a positive cor-relation with REf/RE and feed NE(r=0.587,Pctively).Similarly,muscle peroxisome proliferator-activated receptor gamma coactivator 1 alpha(PGc-1A)expression was negatively correlated with weight gain and positively correlated with FcR(r-0.451,Pctively).These correlations show that over-expressions of muscle genes related to energy production reduce bird *** study demonstrated that Mc increase dietary energy utilization,regardless of dietary cP ***,the energy released by the enzymes in-creases feed energy-to-cP ratio,meaning there is excess energy that is then deposited as body *** suggests that supplemental Mc in broiler feeds is benefi

关键词： Apparent metabolizable energy Net energy Nitrogen efficiency Gene expression Energy-to-protein ratio

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Methane-to-chemicals:a pathway to decarbonization

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National Science Review 2023年第9期10卷 56-71页

作者： Nikolai Nesterenko Izabel c.Medeiros-costa Edwin B.clatworthy Hugo cruchade Stanislav V.Konnov Jean-pierre Dath Jean-pierre Gilson Svetlana Mintova Total Energies One Tech Belgium Zone Industrielle C Laboratoire catalyse et Spectrochimie(LcS) ENSICAENCNRSNormandie Université

The utilization of methane for chemical production,often considered as the future of petrochemistry,historically could not compete economically with conventional processes due to higher investment *** sustainability and decarbonization of the downstream industry by integration with a methane-to-chemicals process may provide an opportunity to unlock the future for these ***-to-chemicals is an efficient tool to boost the decarbonization potential of renewable *** the current implementation of carbon capture utilization and storage(ccUS) technologies is of great importance for industrial decarbonization,a shift to greener cO2-free processes and cO2utilization from external sources for manufacturing valuable goods is highly *** review outlines potential options for how a methane-to-chemicals process could support decarbonization of the downstream industry.

关键词： methane chemicals pathways decarbonization

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c*-Algebraic Intertwiners for Degenerate Principal Series of Special Linear Groups

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chinese Annals of Mathematics,Series B 2014年第5期35卷 691-702页

作者： pierre cLARE Department of Mathematics Pennsylvania State University McAllister Building University Park

The author constructs unitary intertwiners for degenerate c*-algebraic universal principal series of SL(n + 1) over a local field by explicitely normalizing standard intertwining integrals at the level of Hilbert modu... 详细信息

关键词： Group c*-algebras Hilbert modules Semisimple Lie groups Principalseries representations Intertwining operators

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