存在

In this project, we study the theory of higher order differential equations in Banach spaces and related topics. We solve an open problem put forward by two American Mathematicians and two Italian Mathematicians concerning wave equations with generalized Weztzell boundary conditions, introduce an existence family of operators from a Banach space $Y$ to $X$ for the Cauchy problem for higher order differential equations in a Banach space $X$, establish a sufficient and necessary condition ensuring $ACP_n$ possesses an exponentially bounded existence family, as well as some basic results in a quite general setting about the existence and continuous dependence on initial data of the solutions of $ACP_n$ and $IACP_n$. We set up quite a few multiplicative and additive perturbation theorems for existence families governing a wide class of higher order differential equations, regularized cosine operator families, regularized semigroups, and solution operators of Volterra integral equations, obtain classical and strict solutions having optimal regularity for the inhomogeneous nonautonomous heat equations with generalized Wentzell boundary conditions, gain novel existence and uniqueness theorems,which extend essentially the existing results, for mild and classical solutions of nonlocal Cauchy problems for semilinear evolution equations, present a new theorem with regard to the boundary feedback stabilization of a hybrid system composed of a viscoelastic thin plate with one part of its edge clamped and the rest-free part attached to a visocelastic rigid body. Also we obtain many other research results.

在本研究中，我们对Banach空间中的高阶算子微分方程的理论以及相关理论进行了深入研究，解决了由美国和意大利的四位数学家联合提出的一个关于广义Wentzell边界条件下的波动方程适定性的公开问题，恰当地定义了Banach空间中的高阶算子微分方程Cauchy问题的算子存在族及唯一族，建立了齐次和非齐次高阶算子微分方程Cauchy问题适定性的判别定理，获得了关于高阶退化算子微分方程的算子存在族、正则余弦算子族、正则算子半群、Volterra积分方程解算子族的乘积扰动和混合扰动定理，得到了关于以依赖于时间的二阶微分算子为系数的一大类非自治热方程非齐次情形下的时变广义Wentzell动力边值问题的古典解、严格解的最大正则性结果，获得了半线性发展方程非局部Cauchy问题广义解和经典解存在唯一的判别条件，从实质上推广了现有的相关结果；得到了一部分边缘固定而另一部分附在一粘弹性刚体上的薄板构成的混合粘弹性系统的边界反馈稳定化的新稳定化定理，还建立了一系列其他研究结果。

Based on an analysis of the natural, social and economic situations of flood plain in lower reach of Yellow River as well as the status of harnessing, this paper elaborates the problems facing the area, such as flood menace, serious status of suspended river, severe disasters of drought and waterlog, single production structure, implementation of flood plain policies and sluggish safety construction of flood plain.

在敍述黄河下游滩区白然情况、社会经济情况、滩区治理现状的基础上，详细论述了黄河下游滩区存在的问题。由於黄河水沙问题复杂，治理难度大，滩区治理开发也受到限制，目前存在的主要问题是：l洪水威胁依然存在；2悬河形势严峻、河势尚未有效控制；3滩区旱涝灾害严重；4滩区产业结构单一；5滩区政策落实不到位；6滩区安全建设状况严重滞后。

What everyone said did not exist must exist. For example, suppose Wang Er didn't exist, then where's the name Wang Er from?

大家都说不存在的东西一定存在，比如王二，假如他不存在，这个名字是从哪里来的？

A complete set of thermodynamically consistent property data (vapor pressure, aqueous solubility, octanol solubility, octanol-water partition coefficient, octanol-air partition coefficient, and air-water partition coefficient) for sixteen PAHs naphthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, pyrene, chrysene, benzoanthracene, benzofluoranthene, benzofluoranthene, benzopyrene, indeno[1,2,3-c,d]pyrene, dibenzo(a,hanthracene and benzoperylene was derived from measured data reported in the literature.

然而，由于存在实验室内、实验室间和不同仪器、不同方法间的误差等因素，已发表的物化性质数据存在小分子量PAHs物化性质参数多但存在差异、大分子量PAHs相关参数较少甚至缺乏的问题。

The influence of regional culture to Donggan literature have three facets:literary language,folk custom,effects of writer. Donggan literature under infulunce of regional culture has enlightment singnificance for study of world literature of China.As far as second part is concerned, Middle-Asia Donggan literature and Chinese Hui literature have common cultural oringin.Their development are different directions of Chinese ancient Hui literature.To analyze the common images of two nationalities,such as "moon","cattle" and"Ahong",we can see the relationship between them.We also have new opions of two nationalities\' development,if we take their literature as mutual refrence system. There are comparability between Middle-Asia Donggan literature of Chinese origin and literature of Russian emigrants in China ,though they have geographical long-distance. Chinese culture and Russian culture have influenced these two literature.They can not only display profound influence of Russian culture and Chinese culture collision,but also display various artistic forms of Russian literature and Chinese literature exchang in the 20th century.

就下编内容具体而言，中亚东干族的文学和中国回族的文学有共同的文化渊源，它们是中国古代回族文学在20世纪以来发展的两个不同向度，解读两族文学中共有的&月亮&、&牛&、&阿訇&意象，能发现两族文学间千丝万缕的联系，如果以互为参照系的方式观照两族文学，我们还会对两族文学的发展产生全新的理解；中国俄裔侨民作家群和中亚华裔东干作家群虽然地理上相隔遥远，但他们的文学存在可比性，中国俄裔侨民文学与中亚华裔东干文学都受中国文化和俄罗斯文化影响，这两个侨民作家群的文学不仅能显示中、俄文化碰撞对20世纪侨民文学的发展影响深远，也能显示20世纪的中、俄文学交流存在多种艺术形式；美国非裔黑人文学与中亚华裔东干文学虽然分属于不同的文化谱系，但存在可比性。

The influence of regional culture to Donggan literature have three facets:literary language,folk custom,effects of writer. Donggan literature under infulunce of regional culture has enlightment singnificance for study of world literature of China.As far as second part is concerned, Middle-Asia Donggan literature and Chinese Hui literature have common cultural oringin.Their development are different directions of Chinese ancient Hui literature.To analyze the common images of two nationalities,such as "moon","cattle" and"Ahong",we can see the relationship between them.We also have new opions of two nationalities\' development,if we take their literature as mutual refrence system. There are comparability between Middle-Asia Donggan literature of Chinese origin and literature of Russian emigrants in China ,though they have geographical long-distance. Chinese culture and Russian culture have influenced these two literature.They can not only display profound influence of Russian culture and Chinese culture collision,but also display various artistic forms of Russian literature and Chinese literature exchang in the 20th century.

就下编内容具体而言，中亚东干族的文学和中国回族的文学有共同的文化渊源，它们是中国古代回族文学在20世纪以来发展的两个不同向度，解读两族文学中共有的&月亮&、&牛&、&阿訇&意象，能发现两族文学间千丝万缕的联系，如果以互为参照系的方式观照两族文学，我们还会对两族文学的发展产生全新的理解；中国俄裔侨民作家群和中亚华裔东干作家群虽然地理上相隔遥远，但他们的文学存在可比性，中国俄裔侨民文学与中亚华裔东干文学都受中国文化(来源：A82BacC论文网www.abclunwen.com)和俄罗斯文化影响，这两个侨民作家群的文学不仅能显示中、俄文化碰撞对20世纪侨民文学的发展影响深远，也能显示20世纪的中、俄文学交流存在多种艺术形式；美国非裔黑人文学与中亚华裔东干文学虽然分属于不同的文化谱系，但存在可比性。

Guo Guichun, the Chinese expert in scientific realism, considers that different from the argumentation between the former traditional realism and the antirealism, the divarication from the contemporary scientific realism with the antirealism is no longer about whether or not acknowledgement of existed objective world independent from the will of the people, or ontology question and so on in material first nature, but about the acknowledgment of world existence, acknowledgement of the perceptual experience provided for objective world information, acknowledgement of the science as the rational cause, acknowledgement of the progressiveness and success of science, acknowledgement of that under the premise of theory entity playing key role in the cognition process, to understand why the science can obtain success, approach the truth gradually, or the real existence of theory entity, or actuality of the scientific goal, so on in the divarication of significant epistemology .

中国科学实在论研究专家郭贵春认为：与既往的传统实在论与反实在论之争不同，当代科学实在论与反实在论之间的分歧，不再是关于是否承认存在着独立于人心的客观世界，是不是物质第一性等本体论问题上的分歧；而是在承认世界的存在性，承认感性经验(来源：ABba0aC论文网www.abclunwen.com)能为我们提供客观世界的信息，承认科学是一项合乎理性的事业，承认科学的进步性与成功性，承认理论实体在认识过程中能起重要作用的前提下，理解科学为什么会取得成功，为什么会向着逼近真理的方向发展，理论实体是否真的存在，科学的目的究竟是什么等重大认识论上的分歧。

A dragon, after all, was a god-figure that they could see: It was there, as real as the archdemon itself, and, as evidence makes clear, did offer a degree of protection to its cult.ts.

然而，一只巨龙却是真实存在且可被看见的：它就存在于那里，像大恶魔的存在一样真实，且据确凿的证据说明，巨龙确实能为它的信徒们提供一定程度上的保护。

In Chapter Ⅲ, the global stability and global attractivity of some planar autonomous systems are dealed with.

第二章考虑平面自治系统同宿轨族的一些定性性态，证明了系统至多存在一个最大椭圆扇形，得到此系统的轨线趋于奇点及同宿轨族、闭轨族、双曲扇形和椭圆扇形的存在性与不存在性的充分或充要条件。

Meanwhile, Azoxybenzene was also detected by GC-Mass from the extracts of culture fluids with dichloromethane, which conformed the probability of the existence of two metabolites: nitrosobenzene and N-phenylhydroxylamine. Because Azoxybenzene might be yield from the reaction of these two compounds under the catalytic influence of alkali.

另外通过GC-MS测定硝基苯降解液的二氯甲烷提取物，测到氧化偶氮苯的存在，它能在碱的催化作用下由亚硝基苯和N-苯基羟胺反应生成，所以它的存在从反面证实了降解中间产物亚硝基苯和N-苯基羟胺的存在。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。