课题

Active Galactic Nucleus have been an important branch and one of the most active frontiers in the field of modern astrophysics. It is related to the most fundamental problems in astrophysics .

活动星系核是现代天体物理学研究的重大前沿课题，涉及到天体物理学中最基本的问题。

Ctive Galactic Nucleus is the hottest research on modern astrophysics. Blazars are one of the most extreme classes of active galactic nucleus, with high luminosity, large amplitude and rapid variability, high and variable polarization, radio core-dominance, and apparent superluminal speeds. Their broad band emission extends from radio up to γ-ray band, and dominated by non-thermal process.

GNs是近代天体物理学研究的热门课题，blazar天体是AGNs中具有极端物理性质的一个子类，它以大振幅快速光变、高且变化的偏振、射电核主导、视超光速运动、全波段非热辐射为主要特征。

The analysis and design of controllers for fuzzy control systems have been an active question for a long time.

模糊控制系统的稳定性分析和设计方法一直是较活跃的研究课题。

Financial risk theory is a hot topic in actuarial field recently.

金融风险理论是当今精算界研究的热门课题。

Research of routing protocols becomes the most important part of the research of Ad hoc networks.

因此，对该环境下路由协议的研究成为了Ad Hoc网络中研究的主要课题。

China chose market economy, and will adamantine step down, freedom is become cannot evasive times task.

中国选择了市场经济，并将坚定不移走下去，自由成为不可回避的时代课题。

So, it is interesting to understand the mechanism of this thermal adaptability of proteins.

目前，蛋白质温度适应性的机理是一个非常重要的研究课题。

Adaption and development are the basic contents of individual's life as well projects confronted with by adolescents.

适应与发展是个体人生历程的基本任务，也是青少年面临的最重要的二大课题。

As the foundation of ultrasonic testing of composite materials, this thesis is intended to explore in detail a number of features of wave propagation in anisotropic plates, and the following essential problems will be considered:(1) Propagation of plane bulk waves in homogeneous and orthotropic anisotropic media;(2) Lamb wave propagation in multilayered anisotropic plates;(3) Influence of isotropic solid or liquid loading on Lamb wave propagation in anisotropic solid media;(4) Influence of interface layers on Lamb wave propagation in layered anisotropic composite laminates;(5) Dispersion characteristic analysis of attenuation Lamb wave while existing an thin viscous layer which is used for simulating the poor curing in adhesively bonded joints.

作为复合材料超声检测的基础，本文研究了如下国际前沿性的课题：（1）平面体波在正交均匀各向异性媒质中的传播；（2）多层各向异性媒质中Lamb波的传播；（3）各向同性固体或液体负载对各向异性固体媒质中Lamb波传播的影响；（4）界面层对层状各向异性复合媒质中Lamb波传播的影响；（5）胶粘剂未固化而呈现粘弹性时粘接结构中衰减Lamb波的频散特性分析。

Therefore, how to increase the air permeability and smoothness of the filter material, and to reduce the dust adhesiveness and running resistance, has become a research subject.

因此，在保证滤料达到较高的过滤精度情况下，如何提高滤料的透气度及提高表面光洁程度，减少粉尘附着，降低运行阻力是滤料生产厂首先应研究的课题。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐