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2By constructing a completely continuous operator in a functional space and employing the cone compression and expansion fixed point theorems, we obtain some sufficient conditions which guarantee the existence of positive periodic solutions for Eq.

通过在一个函数空间构造一个全连续算子，再利用锥压缩锥拉伸不动点定理，得到了一些保证方程(1)，(2)至少存在一个周期正解的充分条件，所得结论改进了文[1]和[6]中的结果。

Ringrose began to study nest algebras in the 1960s, many people have devoted themselves to the study of non-selfadjoint and reflexive operator algebras including nest algebras, commutative subspace lattice algebras, completely distributive subspace lattice algebras and so on, and obtain a lot of beautiful achievements.

自从60年代J.Ringrose开始研究套代数以来，人们对套代数、交换子空间格代数和完全分配子空间格代数等非自伴自反算子代数进行了深入研究，并且取得了大量出色的研究成果。

You will obtain the ability to find innovative solutions to complex problems in the field of environmental sciences, with its main challenge of climate change.

您将获得的能力，以寻求在环境科学领域的复杂问题的创新解决方案，其对气候变化的主要挑战。

By mean of the method of upper and lower solutions, we will obtain a existence theorem like Kazdan-Warners. Using this theorem, we will study the vortex equation in holomorphic line bundle over complex manifold and prove a theorem of existence of Hermitian metric with a prescribed holomorphic section.

在本论文的最后部分，我们在紧复流形上讨论一类Kazdan-Warner型方程，用上下解方法得到了光滑解存在的Kazdan-Warner型定理，并将其用于研究全纯线丛的涡旋方程，得到了一个具有预定全纯截面的厄米度量的存在定理。

To personage of chief foreign nationality of Aobama selected, the reason that Baidu gives out is: This African descendants black of 47 years old, with the one's previous experience of complex, careless root, 2008 in American general election, with the attitude of an a dark horse, have his moment quickly, obtain include Chinese netizen inside the eager attention of whole world netizen.

对于首位外籍人士奥巴马的入选，百度给出的理由是：这位47岁的非洲裔黑人，以复杂、草根的出身，在2008年美国大选中，以一匹黑马的姿态，迅速走红，获得包括中国网民在内的全世界网民的热切关注。

In chapter 4, we give the definitions of almost spirallike mappings of type β and order α, spirallike mappings of type β and order α and strongly spirallike mappings of type β and order α, and obtain their growth and covering theorems on the unit ball in complex Banach spaces.

在第四章中，我们在复Banach空间中的单位球上定义了几类新的映射：α次的殆β型螺形映射，α次的β型螺形映射和α次的强β型螺形映射，并且证明了它们的增长掩盖定理。

It is difficult to obtain an accurate analytic solution to the machining deformation because of the complicacy of milling process.

铣削过程的复杂性使加工变形问题很难得到精确的解析解。

Thereby, these facts indicate that the SDE not only have better statistic properties but also have uniformly smaller mean square errors than ANOVAE in an available group of linear mixed models. The other significative following work is to generalize the idea of SDE to multivariate linear mixed model and obtain the SDE of variance component matrices which uniformly dominate the ANOVAE either.

对于含有一个随机效应的混合模型，目前文献中都仅讨论了方差分量的谱分解估计和ANOVA估计等价的充要条件，本文首次给出了方差分量的谱分解估计在均方误差意义下严格的优于ANOVA估计的理论结果，并推广到广义谱分解估计，从而说明谱分解估计不仅较ANOVA估计有更好的统计性质，而且在一类常用的模型下有更小的风险损失。

It is difficulty to obtain the real-time information about the formation process of these materials by experimental techniques. Because the composite contains a large number of atoms, it is not possible to use the first principles methods to investigate the growth process.

由于在实验上观察这些复合材料的形成过程还存在着现实的困难，采用第一性原理方法计算量又太大，因此，分子动力学模拟就成为了在原子尺度上研究这一问题的最好的方法。

First of all, confirm the overall evaluating indicators and the base indicators of public transport network in Chinese large cities through repetitive comparison, discussion and consultation to relevant experts; among the base indicators in the overall evaluating indicators, composite the basic probability assignment of evaluation indicators with Dempster-Shafer Theory composition rule upon different experts' experiences and preferences of the expert group, and amalgamate the evaluations of different experts to further obtain the evaluation value of base indicators.

首先通过反复比较、探讨和征询有关专家的意见，确定大城市公交线网综合评价指标及子指标，在综合评价指标的子指标中，对专家组中不同专家的经验和偏好，用证据理论合成规则对评价指标的基本概率赋值进行合成，将不同专家的评价进行融合，获得子指标的评价值，然后通过突变理论将评价指标及子指标作为控制变量进行地面公交线网的综合评价，对北京市进行算例分析结果表明，该方法对大城市公交线网的综合评价是可行。

Metrorrhagia is also gynaecological problems of common diseases.

崩漏是妇科常见病也是疑难症。

WordFTP gives you the convenience and timesaving you need.

wordftp让您的方便和省时您所需要的。