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| 1 | Fragmentation patterns and systematic transitions of the forested landscape in the upper Amazon region, Ecuador 1990-2008显示文摘The analysis of the systeTatic transitions in the forested landscape and the study of the forest fragTentation patterns allow us to deepen our understanding of the changes in the vegetation ground cover. The iTportance of knowing the intricate patterns of the land usage of the upper basin of the ATazon region is widely recognized. This zone is one of the Tost diverse biological areas in the world, is hoTe to large areas of Tature tropical cloud forest and deTonstrates high probabilities of stable cliTatic conditions in light of global warTing. The research quantified systeTatic transitions through the 'loss' and 'gain' of the different categories of landscape during the eighteen-year study period of the Ecuadorian ATazon Region(EAR), the forest fragTentation patterns were also analyzed based on a set of indicators. Therefore, with respect to the entirety of the landscape, the results registered for the ground coverage in forested areas during the first period(1990-2000), show a decrease of 6.99% and an increase of 0.68%; and during the second period(2000-2008), show a decrease of 3.99% and an increase of 2.14%.It deTonstrated that forest and agricultural areas tended to replace or be replaced by herbaceous vegetation faster than expected fortuitously. Finally, the indices of fragTentation signaled intense changes during the 1990-2000 period with a reduction during the period 2000-2008. Percentages registered in the Largest Patch Index(LPI) were between 79.58%; 52.39% and 49.99% respectively; while the Patch Density(PD) varied between 0.04; 0.06 and 0.07. This suggests the propensity of forest cover to reTain intact. The results of this investigation suggest a tendency towards stability in Ecuador's ATazon landscape. Within the fraTework for developTent and TanageTent of this area, the tendency is natural regeneration. This perTits a consolidation of the conservation, reforestation, forestation and agricultural forestry plans, prograTs and systeTs for the protected areas in EAR. | Santiago Bonilla-Bedoya Juan R.Molina José E.Macedo-Pezzopane Miguel A.Herrera-Machuca | 2014 | Journal of Forestry Research2014，25，2： | 0 |
| 2 | 一些XYZ共振态的辐射衰变显示文摘类粲偶素态Y(3940),Z(3930)和X(4160)可由带粲数的矢量介子相互作用动力学地产生出来,它们的开粲辐射衰变对于理解其内部结构有重要意义。本文研究了这些共振态衰变到D*Dγ或Ds*Dsγ的开粲辐射衰变,结果表明,对分别具有D*D*(或Ds*D s*)分子态和非分子态结构的XYZ共振态,其辐射衰变宽度(或辐射衰变宽度比)相对于Dγ(或Dsγ)体系不变质量Minv的分布图存在非常明显的区别,这为鉴别类粲偶素态XYZ是否具有分子态结构提供了很好的理论判据。 | 梁伟红 R.Molina E.Oset | 2011 | 广西物理2011，32，1： | 0 |
| 3 | Charmed hadrons in nuclear medium显示文摘We study the properties of charmed hadrons in dense matter within a coupled-channel approach which accounts for Pauli blocking effects and meson self-energies in a self-consistent manner.We analyze the behaviour in this dense environment of dynamically-generated baryonic resonances as well as the open-charm meson spectral functions.We discuss the implications of the in-medium properties of open-charm mesons on the D s0 (2317) and the predicted X(3700) scalar resonances. | L.Tolos D.Gamermann C.Garcia-Recio R.Molina J.Nieves E.Oset A.Ramos | 2010 | Chinese Physics C2010，34，9： | 0 |
| 4 | Sequential single pion production explaining the dibaryon'd^(*)(2380)'peak显示文摘In this study,we investigate the two step sequential one pion production mechanism,that is,np(I=0)→π^(-)pp followed by the fusion reaction pp→π^(+)d,to describe the np→π^(+)π^(-)d reaction withπ^(+)π^(-)in state I=0.In this reaction,a narrow peak identified with a'd(2380)'dibaryon has been previously observed.We discover that the second reaction step pp→π^(+)d is driven by a triangle singularity that determines the position of the peak of the reaction and the high strength of the cross section.The combined cross section of these two mechanisms produces a narrow peak with a position,width,and strength,that are compatible with experimental observations within the applied approximations made.This novel interpretation of the peak accomplished without invoking a dibaryon explains why this peak has remained undetected in other reactions. | R.Molina Natsumi Ikeno Eulogio Oset | 2023 | Chinese Physics C2023，47，4： | 0 |
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