不确定性

Analysis shows that the robot model containing uncertainty can be transformed into a quasi—linearized form by using nonlinear feedback and diffeomorphism. Based on this result, a simple design method is proposed for robot tracking control.

第一种算法将谈自忠等提出的机器人反馈线性化控制推广到存在不确定性的情形，指出通过非线性反馈和微分同胚变换可将含不确定性的机器人模型变换成准线性形式，基于此给出一种简单的跟踪器设计方案。

By using diffeomorphism containing estimated parameters, we propose a new nonlinear adaptive control strategy for non parameter—pure feedback systems. We also make some improvement for the nonlinear adaptive strategy proposed by I.

研究了实际系统可能存在的一类不确定性——参数不确定性情况下的非线性自适应控制，对已有的非线性自适应控制方法进行了分析和分类。

Using the convex set model to describe the uncertainty existed in the parts design.By adopting the physical planning method to construct discontentedness function of the uncertainty parameters.

用凸集模型描述零件设计中存在的不确定性，采用物理规划方法构造不确定性参数的不满意度函数，通过极小化不满意度函数最差值实现目标函数的稳健性，通过灵敏度分析实现约束函数的稳健性。

This paper addressed the problem of robust H_∞ filter design for linear discrete systems with state delay and parameter uncertainty .

研究了一类含有状态时滞的离散不确定性系统的鲁棒H∞滤波器设计问题，其中，系统的参数不确定性是时变和模有界的。

Financial crises are marked by a disquieting uncertainty about the value of assets and money, which makes them deeply disorientating.

金融危机的标志是资产和货币价值的不确定性，这种不确定性令人不安，使人迷惑。

Knightian uncertainty ; ambiguity ; risk ; theory of behavioral decision ; Ellsberg paradox

奈特不确定性；模糊不确定性；风险；行为决策科学； Ellsberg悖论

The latter two all reckon that basic shape of line element error band based on control points error is "dumbbell-shape",i.e.error in control end points is larger than points error between two control points.

后两者均认为以控制点点位误差描述的线元的误差带的基本形状呈"哑铃"形，即认为线元上端点的位置不确定性大于端点之间的点的位置不确定性。

ABSTRACT Global carbon cycle is a very important issue in the study of global climate change. Forest ecosystem carbon cycle is one of the important part of global carbon cycle, but at the present time there are considerable uncertainties in the research of global carbon cycle, which also exist in forest ecosystems carbon cycle research, especially in the estimation of carbon storage of region forest ecosystems and CO〓 fluxes exchanging with other systems.

全球碳循环是全球气候变化研究的核心问题之一，森林生态系统碳循环是全球碳循环的重要组成部分，目前在全球碳循环的研究中还存在很大的不确定性，这种不确定性同样存在于森林生态系统碳循环的研究中，尤其表现在对区域森林生态系统碳库大小及其与大气CO〓交换通量的估计上。

Further, the stability region estimation problem for mismatched uncertain plants′VSC systems is studied and solved, and a more extensive sufficient stability region estimation result is gotten. By analyzing the result, the relation between the control bounds and the system robustness is shown.

在控制受限的情况下，改进和完善了文献[58，59，130]提出的确定性对象或匹配不确定性对象变结构控制系统的稳定域估计方法，并进一步研究了失配不确定性对象变结构控制系统的稳定域估计问题，取得了更广泛更全面的充分性稳定域估计结果，从中分析得出了控制受限界与控制系统鲁棒性的关系。

Uncertainty is one of the most important issues of the modern development of economics. Exhaustible resources are important impetus of economic growth. So it is worthy of studying the uncertainty problems of exhaustible resources market.

不确定性是经济学现代发展的一个重要研究方向，可耗竭资源是经济增长的重要推动力量，因此，可耗竭资源市场中的不确定性问题是值得研究。

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。