查询词典 hilbert problems

LES cooperated with the second order full extension ETG finite element method is applied to simulate three typical problems concerned with convection heat transfer with sufficient experimental data. By comparing the numerical results with the experimental results, LES is proved to be of better accuracy and stability when it is used to solve the problems concerned with convection heat transfer. The time history of the flow field and temperature field can be reflected better, and abundant information of the fields can be obtained. Furthermore the details of the change in the vortex structure can be captured.

应用大涡模拟与二阶全展开ETG有限元离散格式相结合的方法对具有实验基础的三个典型对流换热问题进行了数值模拟，并将模拟结果与相应的实验结果进行对比，证明了大涡模拟应用于对流换热问题中具有较高的稳定性和精度，能够较好地反映流场和温度场的时变过程，提供丰富的温度场和流场信息，捕捉流场中旋涡结构的变化细节，尤其适合于边界形状复杂的区段内含有大尺度各向异性涡的流动和换热问题的计算。

Ironically most of these people are busy fixing unfixable problems, and don't even try to fix fixable problems.

令人讽刺的是，这些人中的大部分人一直忙于解决那些布恩那个解决的事情，而不去解决安歇可以解决的问题

Both of these problems are discussed below, and both of these problems are fixable if you begin to address them now.

这两个问题容我下文详论，但只要你现在就开始注意，都不难解决。

In the solution of the problems in algebraic equation, differential equation and integral equation, we usually resort the sotution of equation to the fixed point of mapping in metric space. The contraction mapping principle can be used to solve many problems of the existence and uniqueness of equation solution.

在代数方程、微分方程和积分方程的求解问题中，通常把所求的解归结为度量空间中映射的不动点，然后应用压缩映象原理来统一处理许多方程解的存在性和唯一性问题。

The main contents of this dissertation achieved are to start with the essence of dynamic traffic flow information collection technology, establish the function of the Dynamic Traffic Flow Information Collection Systems, and set up useful system architecture, then research the space collocation problems of the fixed detection and the sample problems of the floating detection.

由于固定型检测器的空间布置密度对交通流特性描述的准确性和可靠性有显著的影响，因此，本文设计了固定型检测器的空间布置原则和工作步骤，利用微观模拟仿真的方法对检测器的空间布置间距进行优化，在保证ATMS对基本交通流信息需求的前提下，尽可能降低动态交通流信息采集的成本。

PartⅡIt analyses the main problems that exist in the northeast old industry base at present and looks back on the countermeasures against the probloms. Through the analysis and review we find that human environmentˊs fogyism is the sticking point of these problems.

第二部分，分析了目前东北老工业基地存在的主要问题，对于解决这些问题所采取的对策进行了回顾，发现人文环境滞后是东北问题的根源。

In this paper, the status quo of China's tourism industry began on China's tourism marketing activities of the problems are analyzed, but also put forward a solution to these problems.

本文从我国旅游行业的现状开始，对我国旅游市场营销活动存在的问题进行了分析，同时也提出了解决这些问题的方法。

Objective: To qualitatively analyze the deep seated reasons and the transformation mechanism of functional problems of Chinese disease control and prevention institutions and to search for solutions for these problems, in an attempt to provide evidences for policy making by relevant authorities.

目的：针对我国国情，定性分析和探讨我国疾病预防控制机构功能问题的深层次原因及转化机制，并研究解决方案，从而为政府部门提供相应的政策建议。

In development lies the fundamental solution to all kinds of problems in the developing countries and a basic condition for solving many problems in the world at large.

发展是解决发展中国家各种问题的根本之策，也是解决全球各种问题的基础条件。

To solve these problems, we must make it clear that: why helium could state in these materials; what disadvantages whill bring to the performance of these materials by these processes; what the influence factors of these processes and how we could control them. These problemes were came up from metaphase of 20th century, and that from 1970s, with the design of fusion reactor and the research development of its materials, we make it sure that these problems must be solved firstly.

为了解决这些问题就需要搞清楚：氦在材料中为什么能够滞留，在什么情况下会聚集、扩散及释放出来；这些过程对材料性能有什么害处；它受什么因素影响以及如何控制它等等。20世纪中期这些问题就已经被提出来，而从70年代开始，随着聚变反应堆的设计和聚变堆材料研究的进展，更加明确它是一个需要解决的难题。

The system can be widely used in belt weighing and batching process control,etc.

介绍了基于智能模糊控制的嵌入式配料系统的设计方法，对模糊PID控制过程和系统调零作了重点的讨论，同时给出了PID控制的程序流程图和系统定长调零子程序。

"I dunno," she answered,"but if you show me aroun', I'll recognize it from the lighthouse just outside the porthole."

"我不知道，"她回答说，"如果你能带我转转，我能认出来的，因为灯塔就在舷窗外。"