Mostrando 3,441 - 3,460 Resultados de 8,308 Para Buscar '"Sand!"', tiempo de consulta: 0.20s Limitar resultados
  1. 3441
    por Bu, Liangtao, Du, Guoqiang, Hou, Qi
    Publicado 2021
    “…The data set was used to develop an ANN, whose optimal structure was determined using the trial-and-error method by taking cement content (C), sand content (S), natural coarse aggregate content (NCA), recycled coarse aggregate content (RCA), water content (W), water–colloid ratio (WCR), sand content rate (SR), and replacement rate of recycled aggregate (RRCA) as input parameters. …”
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  2. 3442
    por Wei, Xing, Cai, Shuqun, Zhan, Weikang
    Publicado 2021
    “…The combined influences of channel dredging, sand mining, and sediment load reduction caused by dam construction have contributed to this change. …”
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  3. 3443
    “…Leishmaniosis infection begins when a phlebotomine sand fly vector inoculates pathogenic protozoan parasites of the genus Leishmania into a mammalian host. …”
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  4. 3444
    “…Leishmania parasites are digenetic protists that shuffle between sand fly vectors and mammalian hosts, transforming from flagellated extracellular promastigotes that reside within the intestinal tract of female sand flies to the obligatory intracellular and non-motile amastigotes within mammalian macrophages. …”
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  5. 3445
    “…We developed indicators of the relative timing of the emergence from the winter sand refuge and the subsequent growth period. Different modeling approaches were used to investigate the relationship with bottom temperature and primary production. 4. …”
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  6. 3446
    “…The physical abrasion caused by sand further exacerbated the release of microplastic particles from masks, with more than 16 million particles released from just one weathered mask in the presence of sand. …”
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  7. 3447
    “…The process of data set separation was arbitrary. Cement, Aggregate, Sand, Water to Cement Ratio, Curing time, Percentage of Bacteria, and type of sand were the input variables, whereas the compressive strength of bacterial concrete has been considered as the final target. …”
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  8. 3448
    “…The difference is that uranium enrichment in sandstone is often generated in a mud-sand-mud stratigraphic structure, while uranium enrichment in coal usually develops as coal-sand-mud. …”
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  9. 3449
  10. 3450
    “…In terms of average grain size, river A has a greater role in the production of gravel sediments and river B has a greater role in the production of sand and mud sediments. According to the studies, the effect of formation of this catchment (Mozduran 3, Tirgan, and Mozduran 1) on the production of gravel sediments and other formation (Chaman Bid, Sarcheshmeh, and Shurijeh) which include more shale layers is more in the production of sand and mud sediments. …”
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  11. 3451
  12. 3452
    “…Despite a remarkable fossil record, the emergence of their crown group is documented by few specimens of unclear affinities, rendering their early history uncertain. The origin of sand dollars, one of its most distinctive clades, is also unclear due to an unstable phylogenetic context. …”
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  13. 3453
    “…Excessive demand of concrete is causing depletion of natural sand resources. Especially, the extraction of river sand negatively affects its surrounding environment. …”
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  14. 3454
    por Xiang, Bo, Liu, Enlong, Yang, Liuxin
    Publicado 2022
    “…Firstly, triaxial compression tests on sand samples under undrained conditions were performed to investigate the influences of freezing–thawing cycles, which shows that the freezing–thawing actions can weaken their strength and stiffness, and with the increasing freezing–thawing cycles, both the deviatoric stress and pore water pressure decrease gradually. …”
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  15. 3455
    “…Three types of dusty days were considered in this study: suspended dust, blowing dust, and sand storms. The impacts of sand storm weather on public health are stronger than those from blowing dust weather, suspended dust weather (haze), and non-dust weather. …”
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  16. 3456
    “…CONCLUSIONS: In this study, it was found that the surface treatment with 50 μm alumina airborne-particle abrasion, silica coating with Cojet™ sand, anodization followed by 50 μm alumina airborne-particle abrasion, and anodization followed by silica coating with Cojet™ sand improved the SBS between titanium and lithium disilicate luted with Multilink N resin cement.…”
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  17. 3457
    “…Both coding and noncoding reconstructions showed that several “sand-dwelling” hypertrophied lip species, sampled intraspecifically, form a clade interspersed with a few other nonhypertrophied lip lineages. …”
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  18. 3458
    “…Moreover, there was a significant relationship between the abundance of plastic debris and sand grain size fraction (p < 0.05), implying the abundances of microplastic debris were more easily impacted by sand grain size (>2 mm). …”
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  19. 3459
  20. 3460
    “…Ca(ex), CEC and pH were predicted moderately well. Clay and sand models had slightly lower performance. Of the four methods, Cubist produced the strongest models, while PLSR produced the weakest. …”
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