Predicting coffee yield based on agroclimatic data and machine learning     

de Oliveira Aparecido  Lucas Eduardo  Lorençone  João Antonio  Lorençone  Pedro Antonio  Torsoni  Guilherme Botega  Lima  Rafael Fausto  dade Silva CabralMoraes  José Reinaldo 《Theoretical and Applied Climatology》2022,148(3-4):899-914

Theoretical and Applied Climatology - Climate directly and indirectly influences agriculture, being the main responsible for low and high yields. Prior knowledge on yield helps coffee farmers in...  相似文献   

Animal thermal comfort index for the state of Paraíba,Brazil: trend,influencing factors,and mitigating measures     

da Silva  Valquiria Cordeiro  de Sousa Nascimento  Robson  Neto  José Pinheiro Lopes  de Melo Lopes  Fernanda Fernandes  Miranda  Jaciara Ribeiro  Furtado  Dermeval Araújo 《Theoretical and Applied Climatology》2022,147(1-2):523-534

Theoretical and Applied Climatology - The present work had the objective to determine the tendency and the influence percentage of climatic variables on the Temperature and Humidity Index (THI) in...  相似文献   

Multi-model climate projections of the main cyclogenesis hot-spots and associated winds over the eastern coast of South America     

de Jesus  Eduardo Marcos  da Rocha  Rosmeri Porfírio  Crespo  Natália Machado  Reboita  Michelle Simões  Gozzo  Luiz Felippe 《Climate Dynamics》2021,56(1-2):537-557

Climate Dynamics - In this study, multi-model ensembles are used to understand regional features of future climate trends of cyclones and associated winds in eastern South America. For this, we...  相似文献   

The origin of the near-IR line emission from molecular,low and high ionization gas in the inner kiloparsec of NGC 6240     

Gabriele da Silva Ilha  Marina Bianchin  Rogemar A. Riffel 《Astrophysics and Space Science》2016,361(6):178

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Some remarks on the assessment of P-wave velocity in laboratory tests for evaluating the degree of saturation     

Astuto  Giuseppe  Molina-Gómez  Fausto  Bilotta  Emilio  Viana da Fonseca  António  Flora  Alessandro 《Acta Geotechnica》2023,18(2):777-790

Acta Geotechnica - This work stems from the need to validate a technique for a reliably measurement of the degree of saturation (Sr) in deposits composed of sandy soils to improve their...  相似文献   

Shear behaviour of subgrade soil with reference to varying initial shear stress and plasticity index     

Silva  Isabella Novais  Indraratna  Buddhima  Nguyen  Thanh Trung  Rujikiatkamjorn  Cholachat 《Acta Geotechnica》2022,17(9):4207-4216

Acta Geotechnica - The influence of stress anisotropy (K) (i.e. the ratio between effective horizontal and vertical stresses) on the shear behaviour of soils has received significant attention in...  相似文献   

Grain-scale analysis of proppant crushing and embedment using calibrated discrete element models     

Bandara  K. M. A. S.  Ranjith  P. G.  Zheng  W.  Tannant  D. D.  De Silva  V. R. S.  Rathnaweera  T. D. 《Acta Geotechnica》2022,17(11):4837-4864

Acta Geotechnica - Proppant crushing and embedment in hydraulically-induced fractures is a major drawback to the recovery of unconventional oil/gas and geothermal energy production. This study...  相似文献   

The multistage crystallization of zircon in calc-alkaline granitoids: U–Pb age constraints on the timing of Variscan tectonic activity in SW Iberia     

M. F. Pereira  M. Chichorro  P. Moita  J. F. Santos  A. M. R. Solá  I. S. Williams  J. B. Silva  R. A. Armstrong 《International Journal of Earth Sciences》2015,104(5):1167-1183

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Advances in SHRIMP geochronology and their impact on understanding the tectonic and metallogenic evolution of southern Brazil     

L. A. Hartmann  J. A. D. Leite  L. C. Da Silva  M. V. D. Remus  N. J. McNaughton  D. I. Groves 《Australian Journal of Earth Sciences》2013,60(5):829-844

Significant improvements, both in understanding the evolution of zircons and in understanding the geotectonic and metallogenetic evolution of the complex terrain of southern Brazil, are obtained from a SHRIMP geochronology study and reviewed in this paper. The use of backscattered electron and cathodoluminescence images, prior to SHRIMP isotopic determinations, proved of enormous fundamental value for this technique. Zircon is a domainal open‐system mineral in many geological conditions; very old domains may be preserved, but the same crystal may show ages of younger tectonic events. Zircons may recrystallise inwards from the rims or outwards from the cores, and also along euhedral high‐U or metamict thin zones. Zircons also may be recrystallised during gold‐related hydrothermalism, phyllic alteration of granitic rocks. The precise dating of amphibolite dykes can be achieved by the identification and dating of magmatic zircons. Precambrian orogenies are identified along with the intervening intracratonic tectonic cycles of supercontinents in southern Brazil from 3300 to 470 Ma. Granulite protoliths were formed during the Jequié Orogeny (ca 2600 Ma), but extensive arc accretion occurred in the Palaeoproterozoic (ca 2250 Ma) Encantadas Orogeny. Late in the Transamazonian Cycle, granites were formed by crustal melting at about 2000 Ma in the Camboriú Orogeny. Both accretionary and collisional orogenies are also identified in the Neoproterozoic Brasiliano Cycle. These are the accretionary Passinho Orogeny (ca 900 Ma) and São Gabriel Orogeny (ca 700 Ma), that were succeeded by the collisional Dom Feliciano Orogeny (ca 600 Ma). Base‐metal and gold deposition occurred in juvenile island arcs and in late orogenic porphyry‐copper‐type magmatic‐hydrothermal settings during the Neoproterozoic.  相似文献   

Effet auto-épurateur de la lithologie des affleurements géologiques dans un climat semi-aride: cas du bassin versant de l'Oued Mellègue (Nord-Ouest de la Tunisie)     

Ammar Mlayah  Eduardo Anselmo Ferreira Da Silva  Fethi Lachaal  Samia Khadhar  Abdelkrim Charef  Fernando Noronha 《水文科学杂志》2013,58(3):686-705

Résumé

Le Nord-Ouest de la Tunisie renferme plus que 81% des eaux de surface et 95% des mines et gîtes miniers. Le bassin versant de l'Oued Mellègue, situé dans cette zone, englobe 13 mines de plomb, zinc, fer, strontium, fluor, barium et phosphates. L'impact des rejets de ces mines sur les eaux de surface a été apprécié grâce à plusieurs compagnes d’échantillonnage. Les résultats d'analyse par ICP/MS de ces échantillons montrent qu'ils renferment des quantités non négligeables d'Al, As, B, Ba, Br, Cd, Co, Cr, Cu, Hg, Mo, Ni, Sr, U et de Zn. L'analyse des ces éléments dans les eaux du Mellègue, de ses affluents et dans la retenue de Nebeur montre que leurs concentrations sont inférieures aux normes d'eau potable. Ce comportement pourrait être dû à la nature des affleurements géologiques formés par des carbonates des argiles et des évaporites, à l'absence de cours d'eau drainant directement les rejets, à la formation de minéraux secondaires caractérisés par une importante rétention des métaux et à l’étendue des bassins versants non pollués.  相似文献