查询词典 existence

The thesis is organized as follows:In Chapter 1,a new partial differential equation model for Spontaneous Potential log in heterogeneous formations is introduced.At the same time,the existence and uniqueness of weak solution to the problem are proved,and the problem of resistance identification in SP log is studied.Furthermore,a jump condition capturing finite difference scheme is proposed and applied to solve such elliptic interface problems.The effects of various factors on SP response,which include objective layers resistivity,bed thickness,bore-hole diameter,invasion and water-flooded zones and so on,are investigated quantitatively by the proposed method, and satisfactory results are obtained.

具体安排如下：第一章首先建立复杂地层中自然电位测井的偏微分方程数学模型，证明了该边值问题弱解的存在唯一性，在此基础上研究了自然电位测井电阻率识别问题：然后发展了用于求解椭圆交界面问题的间断捕捉有限差分方法，利用该方法定量分析了目的层电阻率、地层厚度、井径、侵入带和水淹层等因素对自然电位测井响应的影响，取得了满意的结果。

Driven to the point of extinction, the Borg continue to fight for their very existence, for their culture.

（被逼到了灭绝的边缘，博格继续为了他们的存续而战斗，为了他们的文化而战斗。

Many of the estimated8,000 to18,000 Bornean clouded leopards in existence inhabit a Kansas- size, mountainous rain forest called the Heart of Borneo.

预计8000至18000多云豹存在，占据了婆罗洲堪萨斯尺寸、地雨林的心脏称为婆罗洲。

The mechanism by which particles acquire different mass values is unknown, and finding evidence for the existence of the Higgs boson would address this fundamental mystery of nature.

该机制的粒子获得不同质量的价值是未知的，并找到证据的存在，希格斯玻色子将解决这一根本奥秘的性质。

It is designed to find the Higgs boson, which is needed by physicists to explain the existence of mass, and to explore a branch of physics called supersymmetry.

建造大型强子对撞机的目的是寻找希格斯玻色子，以解释物理学家解释质量的存在，并探索物理学的一个分支，即所谓的超对称性。

Furthermore,the existence of unbounded solutions for a second-order boundary value problem in infinite interval are obtained.

sect；3.4在没有。。。更多非线性项非负的假设条件下，解决了一类周期边值问题非平凡解的存在性。

Then this paper demonstrated the existence and accessibility of variable boundary layer sliding mode in such class of the system.

然后论证了此类系统的变边界层滑动模态的存在性与可达性。

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。

This paper is concerned with the existence of positive solution for singular m-point boundary value problems with p-Laplacian operator by using a fixed point theorem on cone.

运用锥拉伸压缩不动点定理，讨论了一类具有p-Laplacian算子m-点奇异边值问题的正解的存在性，推广和包含了一些已知的结果。

The existence of solutions for multi-point boundary value problem with p-Laplacian operator is investigated by using monotone iterative method, h is proved that boundary value problem has at least one positive solution under suitable conditions.

研究带p-Laplace算子的非线性微分方程的多点边值问题解的存在性，应用单调迭代，给出了这类边值问题存在解的充分条件，还给出了向正解靠近的单调集。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷