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Supersolutions to degenerated logistic equation type  [PDF]
Marcos Marvá
Mathematics , 2014,
Abstract: In this work we provide a method for building up a strictly positive supersolution for the steady state of a degenerated logistic equation type, i.e., when the weight function vanishes on the boundary of the domain. This degenerated system is related in obtaining the so-called large solutions. Previously, this problem was handled as the limit case of non degenerated approaching problems. Our method can be adapted straightforwardly to degenerated boundary value problems.
Fundamental solution of degenerated Fokker - Planck equation  [PDF]
Igor A. Tanski
Physics , 2008,
Abstract: Fundamental solution of degenerated Fokker - Planck equation is built by means of the Fourier transform method. The result is checked by direct calculation.
On Behavior of Solutions of Degenerated Nonlinear Parabolic Equations  [PDF]
T. S. Gadjiev,R. A. Rasulov,S. Ya. Aliev
Mathematics , 2009,
Abstract: The aim of this work is studding the behavior of solutions of initial boundary problem for degenerated nonlinear parabolic equation of the second order, conditions of existence and non-existence in whole by time solutions, is establish.
响叶杨(populusadenopoda)种子的形成及其寿命  [PDF]
南京林业大学学报(自然科学版) , 1984, DOI: 10.3969/j.jssn.1000-2006.1984.01.014
Abstract: <正>用显微技术及软x射线摄影,定位观察响叶杨种子发育过程中的形态变化与胚胎发育的对应关系。根据观察、试验的结果,讨论了环境条件与种子寿命的关系;还测定了响叶杨种子寿命的变化规律及其影响因素,探索延长这种子寿命的方法。
动物学研究 , 1995,
Abstract: 1994年10月15日马中翼等人在云南省泸水县的老窝捕获到1只雄鸟,经中国科学院昆明动物研究所鉴定为黄腰响蜜lie,为我国鸟类科的新记录。标本保存在中国科学院昆明动物研究所鸟类标本室。科的特征体形较小。嘴形似雀,短而粗实,上嘴稍弯曲;尾羽12枚;翅形长而尖,仅具9枚初级飞羽;脚呈对趾型,第2、3趾向前,第1、4趾向后,似啄木鸟。
响蜜lie科的新记录  [PDF]
动物学研究 , 1995,
Abstract: 1994年10月15日马中翼等人在云南省泸水县的老窝捕获到1只雄鸟,经中国科学院昆明动物研究所鉴定为黄腰响蜜lie,为我国鸟类科的新记录。标本保存在中国科学院昆明动物研究所鸟类标本室。科的特征体形较小。嘴形似雀,短而粗实,上嘴稍弯曲;尾羽12枚;翅形长而尖,仅具9枚初级飞羽;脚呈对趾型,第2、3趾向前,第1、4趾向后,似啄木鸟。
不同基质对“珍珠”南瓜叶绿素及NR 和 POD 活 性 的 影 响  [PDF]
武英霞,沈 军,杨和连,李新峥,刘振威
北方园艺 , 2010,
不 同 种 植 密 度 对 蕨 麻 块 根 的 影 响  [PDF]
马国良1,沈宁东1,李军乔2,李 宁1,汤青川1,韦梅琴1
北方园艺 , 2010, DOI: 10.11937/bfyy.201017087
温 度 对 设 施 桃 花 器 官 发 育 的 影 响  [PDF]
北方园艺 , 2010, DOI: 10.11937/bfyy.201020033
滨里海盆地下二叠统盐上盐下构造特征与油气成藏主控因素  [PDF]
- , 2016,
Abstract: 滨里海盆地以下二叠统空谷阶盐岩为界,发育了极具特色的盐上和盐下2套成藏体系。为加深对区域成藏规律的认 识, 为进一步勘探提供参考,从区域构造沉积演化入手,利用最新钻井资料、地震剖面解释和构造编图,分析了盐上、盐 下层系的构造特征与油气成藏主控因素。结果表明,盐下古生界构造层以发育大型古隆起和斜坡带为特征,海西期风化淋 滤作用改善了碳酸盐岩储集层的储集性能,礁滩和岩溶控制着油气的富集。相比而言,盐上层系受空谷阶盐构造运动的影 响明显,可形成盐刺穿遮挡型、盐檐、地层尖灭型、砂岩透镜体等不同类型的圈闭,高效盐窗和盐边/断裂等运移通道是成 藏的关键,盐构造活动期与盐下烃源岩排烃高峰期相匹配是油气成藏的必要条件。
The Pre-caspian Basin is typically characterized by hydrocarbon accumulation in two salt-related sequences, i.e., the post-salt and pre-salt sequences divided by the Lower Permian Kungurian Group. To improve the understanding of the regularities of hydrocarbon accumulation and provide exploration stratedy data, this paper studies the structural characteristics and controlling factors of hydrocarbon accumulation in the two post- and pre-salt sequences by using the latest data of drilling, seismic section interpretation and structural mapping. Results show that large-scale paleo-uplift and slope were developed in the Paleozoic pre-salt sequence and the Hercynian weathering and leaching greatly improved carbonate reservoir properties. Reef, shoal and karst controlled hydrocarbon accumulation. In contrast, the Lower Permian post-salt sequence was significantly controlled by the lower Permian Kungurian tectonic movement, leading to the formation of different types of traps, such as salt diapir, salt eave, stratigraphic pinchout and sandstone lens body. The highly-efficient salt windows, salt flanks and fractures are the key factors controlling hydrocarbon migration. Favorable match between salt tectonic activity and peak hydrocarbon expulsion of source rock is necessary for hydrocarbon accumulation.
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