查询词典 uncertain

I know a young man who is uncertain whether to be a boatbuilder or an accountant .

我认识一个年轻人，他不确定自己到底是做一个造船工人呢，还是做一个会计。

But if investors expand their stock holding period to three or six years, the influence of employee bonus on stock returns is uncertain.

但若将股票持有期间拉长至三年或是六年，则员工分红对於投资人股票报酬率的影响则无确定影响。

On conditions that the dead zone model parameters and the bound of the uncertain nonlinear term are all unknown, the proposed adaptive controller can eliminate the effect of actuator dead zone faults well and ensure bounded-errors tracking.

在死区模型所有参数以及系统非线性不确定项上界均未知的情况下，所设计的自适应控制器可以很好地消除执行器死区故障的影响，保证跟踪误差有界。

The proposed method has the merit that the numerical characteristics of stochastic temperature field response can be obtained by analyzing the random temperature field just in one time.3. Perturbed numerical algorithm of nonprobabilistic convex set theoretical models on the temperature fieldThe uncertain parameters of physical parameters and initial boundary conditions of heat conduction are described by the convex model. The perturbation formulas of the upper and lower bounds of temperature field response with unknown-but-bounded parameters are given via the combination of matrix perturbation theory and the convex set theory model.4. Numerical analysis for transient temperature field with interval parametersConsidering the uncertainties of the transient heat transfer, the physical parameters and initial boundary conditions are regarded as interval variables.

该方法具有只进行一次随机温度场分析便可以获得其响应的数字特征的优点。3、温度场的非概率凸集合理论模型的摄动数值解法将结构导热的物理参数、温度场的初始和边界条件等不确定性参数以凸模型加以描述，基于矩阵摄动理论和处理不确定问题的凸集合理论模型的结合，导出有界不确定参数瞬态温度场响应所在集合的上、下界摄动计算公式。4、具有区间参数的瞬态温度场数值分析考虑结构瞬态热传导问题的不确定性，将结构各物理参数和温度的初、边值条件均视为区间变量。

The uncertain parameters are supposed to belong to a given convex bounded polyhedral domain, entering into all the matrices of the system state-space model.

所研究的对象是同时具有状态时滞和多面体不确定性的离散时间系统。

On the condition that nonlinear function are bounded. By using the linear matrix inequality, a sufficient condition of the output feedback stability about the nonlinear uncertain systems with time-delay is obtained and then the design method of its robust stability is also given in it.

在非线性不确定性满足增益有界条件下，利用线性矩阵不等式方法给出了鲁棒镇定律的存在条件及镇定律存在时相对应的控制器设计方法。

On condition that the nonlinear uncertain function is bounded, based on state observer and controller, we derive a sufficient condition for robust stability independent of delay by the Lyapunov functional theory.

在非线性不确定性满足有界条件下，通过构造增广系统，利用Lyapunov稳定性理论，给出了该不确定性系统基于观测器的鲁棒镇定的充分条件，并给出了相应的状态观测器和鲁棒控制器。

Where the uncertain matrix is norm bounded and time-varying , while the external disturbance is a stochastic process.

假设不确定参数矩阵是时变，范数有界的，外部干扰是一个随机过程。

Based on the delta operator bounded real lemma, sufficient condition with an H〓 norm bound on closed loop uncertain systems and state feedback design are provided.

基于Delta算子的界实引理，给出了闭环不确定系统具有H〓范数界的充分条件及状态反馈设计方法。

For them, the activities of Burgh and those like him are indicative of what could become a dangerous new trend, in which groups of seriously ill people get together online to discuss, source and try untested drugs whose safety and efficacy is uncertain.

对专家而言，象伯格这样的人的做法反映社会上已经形成一种危险的新趋势，即重症病人已经在互联网上形成一个群体，他们彼此交流心得，相互提供信息，一起服用未经试验的药物，可这些药物的安全性及有效性还不明确。

The circulation, consumption and reproduction of the trilogy have not only testified to its historical significance and literariness, but also invested it with new meanings.

该三部曲的流通、消费与再生产不仅验证了其历史意义及文学性，而切还赋予它以新的意义。

If he thought that he could buy me off, he would be wrong.

如果他认为他可以收买我，那他就大错特错了。