不稳定状态

The attention is focus on presenting the sufficient conditions for the existence of the memoryless state feedback guaranteed cost controller by linear matrix inequality technology, and the design of the guaranteed cost control law such that the closed-loop system is asymptotically stable and has a specified upper bound of the closed-loop cost function value for all admissible uncertainties.

利用线性矩阵不等式技术，给出了保性能控制律存在的充分条件，所设计的无记忆状态反馈保性能控制律，可以使闭环系统渐近稳定，且闭环性能指标在允许的范围内不超过某个确定的上界。

The purpose of this paper is to design a state feedback controller such that the closed-loop system is asymptotically stable for all admissible uncertainties.

本文的目的是设计状态反馈控制器，使得对所有满足条件的不确定参数闭环系统都是渐近稳定的。

A convex combination condition and a switching strategy are derived.

针对离散单时滞切换系统，提出了一个使系统渐近稳定的充分性条件，给出了该系统的无记忆状态反馈镇定和无记忆输出反馈镇定，并将结果推广到不确定离散时滞切换系统的鲁棒镇定。

The electronic heating evaporator in the high-side gravity recirculation system in ANSI/ASHRAE 64-2500 standard is replaced by a new type plate evaporator which is more effcient and energy-saving, because the cold water outlet from the evaporator that is used to heat the cryogen can be used once again to cool the air in the air inlet trunk; an air processing unit is designed in the lab design, so to imitate all kinds of weather in each season in every location of China at any time the test is being made; the data selection system can send all the data in the test to the computer at one time, and to reduce the cost of the test some data which is more stable are read manually through traditional meters if this can not sacrifice the precision of the test.

本文的设计中用效率更高的新型板式换热器代替了原ANSFASHRAE 64——2500标准中压缩驱动循环系统中的电加热蒸发器，加热冷剂后得到的低温淡水还可以用于冷却进气通道中的空气，不仅提高了效率，而且更加节能；实验室方案中增加了空气处理系统，可以实现随时对全国各地各季节的空气状态进行模拟，方便实验的进行；采用数据采集系统将数据整体采集到电脑中方便数据处理，而且对于变化频率不高相对较为稳定的数据采取传统仪表进行人工读数，在保证测试结果准确性的前提下降低了成本。

Working steadily on one task over an extended time is a good sign that you were in the creative zone, while rapid shifting from task to task suggests distractedness.

持续稳定地做一件事是个好现象，说明你处于富有创造力的状态，而迅速地更换着做事说明你精力不集中。

Firstly, Receding horizon H〓 control based on state feedback with terminal constraints is proposed for systems with disturbance inputs and parameter perturbations. Linear Fractional Transformation and some existed results on Receding horizon H〓 control for systems without perturbations are introduced.

首先针对同时存在外界输入扰动和自身参数摄动的不确定线性时变系统，利用线性分式变换和现有的一些无摄动系统滚动时域H〓控制的结果，得到了基于状态反馈的终端约束滚动时域H〓控制器的设计方法，并给出了控制律存在和使闭环系统渐近稳定的充分条件。

Mentally, she is not very stable.

她的心理状态不十分稳定。

Newton's Law of Universal Gravitation shows that the material in the universe impossible role in the gravitational stability of the state.

牛顿的万有引力定律表明，宇宙的物质在引力作用下不可能处于稳定的状态。

The prevention complication occurs in the morning, is mainly the blood pressure blood sugar blood fats long-term stability control under the quite good condition, does not smoke, does not drink the protosalt low fat diet, regularly to hospital inspection, adjustment treatment blood sugar normal range, empty stomach blood sugar 60 to 100 milligrams each liter.

防治并发症上午发生，主要是将血压血糖血脂长期稳定控制在比较好的状态下，不抽烟、不喝酒低盐低脂饮食，定期到医院检查，调整治疗血糖的正常范围，空腹血糖60至100毫克每升。

Researching and developing riderless bicycle is a important work offering scientific and actual significance . Internal and overseas research actuality was summarized in this paper , existent problems was analyzed , and then primary development direction of riderless bicycles was presented .

而自行车机器人实际上就是一种无人驾驶的自行车，因此，自行车机器人的控制问题相当困难，如不能采用连续或可微的纯状态反馈实现系统的渐近稳定，不能采用非线性变换实现整体线性化等。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。