查询词典 fourth-born

In this paper,the existence of multiple positive solutions for a class of fourth-order p-Laplacian operator singular boundary value problems is discussed by using the fixed point index,and some sufficient conditions are given such that the problem has at least two positive solutions.

利用不动点指数理论研究了一类含 p-Laplace算子的四阶奇异边值问题的多重正解的存在性，给出了至少存在两个正解的条件，改进了不久前其他作者的相关研究。

Applied Green's function, the differential equations will be transformed into the equivalent of integral equations, sufficient conditions for existence and uniqueness of positive solutions for fourth-order nonlinear singular continuous boundary value problems with p-Lapacian operator are obtained.

文中，利用格林函数，将微分方程转化成等价解的积分方程，给出了该奇异非线性四阶p-Lapacian微分方程边值问题的正解的存在及惟一性的一个充要条件。

At last we apply the results to a kind of fourth order elliptic boundary value problem and Duffing equation.

最后我们将所得结论应用到一类四阶椭圆型微分方程和Duffing方程，给出了它们的解存在唯一的一些结果。

The existence of positive solutions for singular fourth order three-point boundary value problem was investigated.

1引言及预备知识二阶三点边值问题的研究是一个很重要的领域，最近几年的研究也很多。

The results show that the bounding surfaces of study reservoir can be divided into six grades, lithofacies into eleven kinds and architectural elements into four kinds, among which the architectural element restricted by the fourth bounding surface is the most primary unit.

结果表明，目的储层可划分为6级层次界面、11种岩石相类型、4种建筑结构要素，其中4级界面限定的成因砂体为研究的基本单位。

Mr Bowers reckons that the fourth quarter of 2008 may have seen an "inventory shock".

鲍尔斯先生估计2008年第四季度可能会出现"库存休克"现象。

Betel quid chewing is the fourth most popular oral habit. There are about 200 - 600 million BQ chewers in the world.

中文摘要嚼食槟榔是受欢迎的口腔嗜好之一，估计全球约有二到亿的嚼食人口。

Apart from the fourth wheel and the doors, it has a 623cc engine that will muster 33 brake horsepower.

除了四门四轮外，它的发动机排量为623cc产生33制动马力。

The fourth part emphasizes how to branch out into strategic activities after working out the city marketing strategies.

第四章珠海市城市营销战略活动的实施，阐述了在城市营销战略制定后，珠海如何实施城市营销战略活动。

Five main phenomena were found, firstly, the high plasticity clay could well suitable to large deformation, and had strain-hardening behavior obviously, as well as, the little dilatancy; secondly, there was no correlation between stress paths and shear strength but the stress-strain relations were influenced by stress paths; thirdly, the little stress increment ratio, the higher increase speeding of shear stress and breaking strength under the condition of same initial normal stress; the fourth, the relations between normal strain and normal stress in simple shear test was consistent with which in the single-direction compression test, if there was no dilatancy; the last, the curve of relation between stress ratio and shear strain could be well simulated by hyperbola.

试验结果表明，高塑性粘土能够较好地适应大变形，接触面剪应力与切向应变关系呈剪切硬化型曲线，法向剪胀不明显；接触面剪切强度与应力路径无关，应力应变关系与应力路径密切相关；初始法向应力一定，应力增量比越小，剪应力增长越快，对应的破坏剪应力也越高；无剪胀发生情况下，法向应变与法向应力关系曲线与单向压缩试验具有一致性；应力比与切向应变呈良好的双曲线关系。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。