Results 11 to 20 of about 1,257,142 (61)
Journal of Ecology, Volume 107, Issue 6, Page 2697-2712, November 2019., 2019 We integrated multiple components of plant and herbivore diversity to unravel the linkages that drive biodiversity relationships and determine the consequences of biodiversity loss across trophic levels. Our study suggests that lepidopteran phylogenetic diversity is significantly affected by plant species loss when basic splits in the evolutionary ...
Ming‐Qiang Wang +18 more
wiley +1 more source
Jellyfish blooms restructure plankton dynamics and trophic linkages in coastal waters
Functional Ecology, Volume 40, Issue 5, Page 1443-1460, May 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Jellyfish blooms are increasing globally in frequency and intensity, introducing complex ecological interactions, yet the mechanisms by which they alter ecosystem structure remain poorly characterized due to a lack of sustained field observations.
Pengpeng Wang +4 more
wiley +1 more source
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT A comparative study was performed to elucidate the temperature‐dependent corrosion kinetics and the semiconductor/structural characteristics of the passive film formed on Fe40Ni7Cr17Mo12C13B9Y2 (at%) amorphous alloy coatings. The results indicate that increasing temperature accelerates the corrosion kinetics of the coating.
Yang Lv +12 more
wiley +1 more source
Geophysical Research Letters, Volume 52, Issue 10, 28 May 2025.Abstract Enhanced Antarctic ice sheet mass loss yields ocean surface freshening, cooling and sea ice expansion, which result in changes in the atmospheric conditions. Using the Southern Ocean Freshwater Input from Antarctica (SOFIA) multi‐model ensemble, we study the atmospheric response to a 100‐year idealized freshwater release of 0.1 Sv.
Xiaoqi Xu +14 more
wiley +1 more source
A spectral method for the Helmholtz equation in unbounded domain with Perfectly Matched Layer [PDF]
, 2008 中文摘要 Helmholtz方中文摘要程主要描述的是一类波传播现象，包括电磁波、声波、光辐射等，在工程实际和科学技术中有很重要应用。本文考虑半无界条状区域Helmholtz方程，利用完美匹配层（PML）方法将无界区域问题转化为有界区域问题，同时使用谱方法研究完美匹配层参数对误差的影响。主要内容包括:首先，讨论Helmholtz方程背景，涉及时谐波动方程的推导并给出半无界条状区域上Helmholtz方程通解的准确表达式。其次，针对半无界条状区域Helmholtz问题，应用完美匹配层（PML ...
夏林树
core
, 1990 湍流研究具有重要的理论和工程意义,谱方法能达到快速收敛、高效和边界层中高分辨率、高精度。用谱方法边界条件处理也方便,谱方法随着数值方法的改善和计算机系统的发展,它在湍流数值模拟中的作用愈加重要。 这里介绍了一平直槽道及两个同心圆柱间的三维N-S方程数值求解的谱方法,在平直槽道中在平行壁面的x及z方向上用富氏展开,在法向(y)用契比雪夫多项式展开,与平直槽道相似,在θ和z方向用富氏展开,在法向r用契比雪夫多项式展开,为解N-S方程,在时间方向用Crank-Nicholson格式,非线性项用Adam ...
廖柏程, 苏铭德
core +1 more source
四川大学学报. 自然科学版, 2004 给出了变系数Helmholtz方程的六阶高精度校正法.此校正过程几乎不增加工作量,而校正后精度比未校正提高了四阶,并能提供后验误差估计.同时,对于常系数Helmholtz方程,给出了八阶校正格式.
王前东, 程攀, 吕涛
doaj
偶数维空间上广义Beltrami方程组及高维空间的Beltrami方程组 [PDF]
, 1997 本文在ｎ＝２ｌ维偶数空间上得到广义Ｂｅｌｔｒａｍｉ方程组Ｄｔｆ（ｘ）Ｈ（ｘ）Ｄｆ（ｘ）＝Ｊ（ｘ，ｆ）２／ｎＧ（ｘ）的伸张公式，并在Ｈ（ｘ）为对角阵的条件下，给出广义Ｂｅｌｔｒａｍｉ方程组的正则性定理，Ｃａｃｉｏｐｏｌｉ型不等式和可去性定理．此外，还将所有维数的Ｂｅｌｔｒａｍｉ方程组Ｄｔｆ（ｘ）Ｄｆ（ｘ）＝Ｊ（ｘ，ｆ）２／ｎＧ（ｘ）化为一个 ...
程金发, 方爱农
core
Orr-Sommerfeld方程的Green函数和积分方程解法
, 1982 本文提出了一种求解线性稳定性理论Orr-Sommerfeld方程的方法.我们首先定义了该方程的Green函数,并将它表达成矩阵形式;然后证明了Green函数的互易性;最后导出了等价于原方程的线性积分方程 ...
李家春
core +1 more source
四川大学学报. 自然科学版, 2015 在线性近似下,Helmholtz方程能够描述小尺度大气声波波动.因此分析小规模大气声波波动特性,必须对Helmholtz方程进行求解.大多数求解Helmholtz方程的方法是在某些边界条件和初始条件下进行的,而边界条件和初始条件本身就是在假设、近似的基础上得到的,且会使得计算过程复杂和计算量变大.指数函数法具有多个自由参数是求解非线性问题精确解的一种十分有效、直接的工具,且在求解时不要考虑边界条件和初始条件,对函数进行指数和双曲正切变换的共同作用可近似为线性变换.基于上述思想 ...
纪娟娟, 郭业才, 张兰芳
doaj