塌缩

本文对PCF的选择性空气孔塌缩技术进行了详细地介绍，并对应用该技术制成的纤芯变形PCF和模式转化器进行了理论分析，以及相应的数值模拟和实验研究。

This thesis describes this technique in detail , and studies anamorphic core-shape PCF and mode converters based on controlled air hole collapse theoretically and experimentally .

本文主要致力于黑X射线双星光变曲线以及周期性特征的研究。黑洞是经过恒星引力塌缩而形成的一种质量较大的致密天体，几乎所有的黑洞系统是X射线新星。

This paper is contributed to the study of the light curve and periodicity of the black hole X-ray binary Cyg X-1.Black hole is the high-mass compact object , which is result of the gravity collapse of the star and most of the black hole system is X-ray nova .

利用KerrNewman度规，得到了含有电荷、磁荷的塌缩天体的质量亏损。

With the Kerr Newman metric , we obtain the mass defect of collapsing celestial body .

在多级分割算法的图塌缩阶段，提出改进算法&KV算法和VC算法。

After analyzing the algorithm of multilevel graph partitioning , in the graph-coarsening phase , two new algorithms named KV and VC are put forward based on the rule of vertex collapse instead of links ′ .

在此基础上我们又给出了一个严格可解的宏观量子隧道模型，计算了从亚稳凝聚态到塌缩态的宏观量子隧道速率，分析了吸引BEC的稳定性。

Based on this we present an exactly solvable model for macroscopic quantum tunneling of BEC with attractive interaction , and calculate the rate of macroscopic quantum tunneling from a metastable condensate state to the collapse state and analyze the stability of the attractive BEC .

证明了Oppenheimer和Snyder关于均匀密度零压星的引力塌缩的经典解是不完整的，它并不能正确地连接作为内解和外解的Friedmann度规和Schwarzschild度规；

The collapse solution of a star with uniform density and zero pressure given in the classic paper of Oppenheimer and Snyder is proved to be incomplete ; it cannot correctly connect the Friedmann and Schwarzschild metrics as the interior and exterior solu tions .

端基附壁高分子模型链的塌缩转变

Collapse transition of a model polymer chain terminally attached to a surface

关于K~2×I的几类塌缩问题

On Some Classes of Collapse Problems of K × I

科学家们还不完全了解到底是什么引起了塌缩。

Exactly what triggers the collapse is not entirely known .

分子云核塌缩是从内向外的。

Molecular cloud cores collapse from the inside out .

离散时空中的非塌缩的尘埃球解

A non-collapsing solution of a uniform-density ball of dust in the discrete spacetime

得到了阻尼时间与塌缩时间的解析公式。

The analytic formulae of the damping and collapse time can be obtained .

奇异星壳层塌缩的数值研究

Numerical Study on the Collapse of Strange Star Crust

爆炸粉末烧结微孔隙塌缩沉能分析

Analysis of Energy Deposition Caused by Micro-Void Collapse in Explosive Consolidation of Powders

半刚性高分子链塌缩相变的蒙特卡洛模拟

The Monte Carlo simulation of the collapse transition of a semi-stiff polymer chain

量子测量与时空塌缩

Quantum Surveying to Breakdown of Space - time

有些情况下，恒星的塌缩会产生一个黑洞。

In some cases , the collapsing of a star produces a black hole .

聚乙烯链塌缩相变的研究

Study of Collapse Transition of Polyethylene Chain

引力塌缩系统的熵变

Entropy charge of gravitational collape systems

简立方格点自避行走所模拟的高分子链吸附和塌缩

Adsorption and collapse of a polymer chain modeled by a self-avoiding walk on the cubic lattice

不过另外还有一些好理由，让人不得不相信星体塌缩只不过是整个真相的一部份而已。

There are also good reasons to believe that compression is only part of the story .

在星云里面，某些部分足够致密而在自身重力影响下开始塌缩。

Within the cloud , some parts are sufficiently dense to start collapsing under their own gravity .

表明：自引力系统的结构可由一组非线性藕合方程描写：扰动场能塌缩并形成类薄饼结构。

It is shown that the structures of self-gravitating systems can be described by nonlinear coupling equations ;

它们不会塌缩成一个无限小的点，因此它们得以避免塌缩所带来的后遗症。

They cannot collapse to an infinitesimal point , so they avoid the paradoxes that collapse entails .

要是一开始的核心磁场够强，星体塌缩的确可以解释波霎的磁性。

If the core magnetic field started with sufficient strength , this compression could explain pulsar magnetism .

空间飞行器近尾区内场的塌缩和密度空洞的形成

The collapses of electric field and formation of density cavitons in the wake of moving body in space

一团大火球象徵宇宙的结束，物质全部塌缩到原点。

It 'd be the end universe in a big fireball as all the matter collapses onto itself .

如果是小的，塌陷时就会留在塌缩状态，这就是白矮星。

If a star is small , it collapses and remains collapsed , this is called a White Dwarf .

当控制参数变化，系统从半耗散过渡为分段耗散时，混沌吸引子和椭圆岛消失，相空间最终塌缩进入点周期吸引子，这可以认为是一例激变。

With the parameter changing , chaotic attractor and the elliptic islands disappear , and two point periodical attractors appear .

在稀溶液中，高分子链线团采取伸展链构，经冷冻升华的过程后，线团塌缩成紧密小球。

The coils would have an extended conformation in the dilute solution and collapse into compact globules after freeze-drying procedure .