系统发生的

In a very long incubation period, infected Although there is no subjective symptoms, appearance, as ordinary people, but systemic immune system by the AIDS virus continues to damage to the immune system can no longer maintain the minimum defense capability, a variety of normal will not cause disease pathogenic microorganisms would make the conditions of patients with infection caused brain, lungs, gastrointestinal tract and other parts of the lesions and symptoms.

在很长的潜伏期中，感染者虽然没有自觉症状，外表一如常人，但全身免疫系统仍在继续受到艾滋病病毒的破坏，到免疫系统功能再也不能维持最低的防御能力时，多种对正常人不会引起疾病的病原微生物便会使患者发生条件性感染，引起脑、肺、胃肠道和其他部位的病变及症状。

It is found that the change of the frequency characteristics of chaotic system occurs mainly at the frequency band of the chaotic system, in which the input signal exists. The amplitude of the input signal doesn't influence the distortion of the output signal when masking signal is extracted by Oppenheim's chaotic masking.

研究发现，混沌系统频率特性的变化主要发生在输入信号的频率位於混沌系统频带内的情况下；输入信号幅度的大小，不影响输出信号的失真。

This paper shall attempt to look at some aspects of controller synthesis for the multivariable servomechanism problem when the plant to be controlled is subject to uncertainty-in this case,a controller is to be found so that satisfactory regulation/tracking occurs in spite of the fact that the parameters of the plant may be allowed to vary,subject only to the condition that the resultant perturbed system remains stable.

例7 本篇将致力于探讨在待检对象受到不确定性的影响，而仅仅服从受扰动的系统最终保持稳定，这一条件之情况下的多变量随动系统中控制器综合的某些方面的问题。在这种场合，尽管受控对象的参数允许发生变化，而控制器必须具有令人满意的调节和跟随性能。

First, for state estimation problem of the linear stochastic systems with uncertainties in both the state matrix and the noise matrix, a new satisfactory estimator is constructed with stochastic theory, which can guarantee that estimator error system with bounded perturbed model parameter satisfies the constraint indexes that is given. Thus a sufficient condition of solving satisfactory estimation is obtained; secondly, the algorithm of designing satisfactory estimator is presented by analysis.

首先，根据满意控制思想，针对一类在状态矩阵及噪声矩阵中均含有不确定性的随机系统，设计一种满意估计器，使预测误差系统在模型的参数发生扰动时，依然满足预先给定的设计约束指标，得到了满意估计问题求解的充分条件；然后根据分析给出了满意估计器设计的算法。

Mine ventilation system is a multi-variable complex system, in which a roadway may result in changes in the parameters and their relative Boundary more than the wind tunnel and even the whole network of air volume changes; On the contrary, in order to make a certain amount of a wind tunnel to reach a certain required value, but also by a number of roadways in other regulatory measures taken to achieve.

矿井通风系统是一个多变量的复杂系统，其中一条巷道参数的改变可能导致与其相关的多条巷道甚至整个风网的风量发生变化；反之，要想使某一条巷道的风量达到某一要求值，也可以通过在其它若干条巷道内采取调节措施来实现。

Thirdly, the Hopf bifurcation of the self-excited vibration model with moving boundaries is considered.

研究了具有运动边界的自激振动模型的Hopf分叉问题，从系统自激振动的极限环生成和消亡的过程可发现：系统在边界的运动速率变化时能够发生一阶超临界Hopf分叉。

As a subtask of above, the object detection for high-resolution RS images has a good prospect in both military and commerce.

其面临的主要问题有：1系统的处理对象发生了改变，传统的目标检测系统受遥感观测技术的局限，其应用的数据主要是高光谱影像。

Development level of economy was the most crucial factor for transformation of health financing systems.

结果 本系统评价共纳入59 篇文献，经济的发展为各国卫生筹资变革提供了条件，卫生体制出现的问题可以直接导致变革的发生，而政治因素是大多数国家的推动因素，其中韩国是由于民主政治体制下上台政党推动了变革，泰国和德国是由于首相上台而实施的变革，意大利和法国则是由于卫生费用支出过大和卫生系统不公平而导致的变革。

Physics experiments on large scale uniform and non-uniform granular mixtures avalanche were carried out and the results proved that internal cause of SOC effect was most probably the structure characteristics of the system but not the size of granular or the scale of system.

为验证散粒体崩塌中的自组织临界现象是否是一种有限尺度效应，自组织临界现象的发生终究由系统的尺寸还是系统的组织原则来确定，进行了均匀和非均匀散粒体崩塌的实验。

Therefore, it is necessary for modern enterprises to supply reliable and real-time information and services by utilizing computer systems, more and more departments especially those pivotal departments have been unprecedentedly relied on computer systems, however, it is unavoidable for the hardware and software of a computer to have a breakdown, which may certainly results in unmeasured losses.

对现代企业来说，利用计算机系统来提供及时可靠的信息和服务是必不可少的，越来越多的行业、部门，尤其是关键部门，对计算机系统呈现出前所未有的依赖性。但是计算机的硬件和软件都不可避免地会发生故障，会带来无可估量的损失。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。