查询词典 uncertainty

For linear uncertain system, on the condition that parameter uncertainty and unmodelled dynamics uncertainty exist, the method of solving problem of robust H〓 control and robust adaptive control is researched, and its advantage, disvantage and scope of usage are described.

本文的主要工作可以归纳如下： 1、针对线性不确定性系统，分别研究了存在参数不确定性和未建模动态不确定性的情况下，鲁棒H〓控制和鲁棒自适应控制两种控制方法各自解决问题的方法，并阐述了它们的优缺点及适用范围。

Finally, the writer give policy recommendations from the changing of uncertainty of the income, uncertainty of expenditure, unsocialized intensity and overcoming traditional influence.

最后，就改变我国农民收入的不确定性、支出的不确定性、农业生产的社会化程度不高的现状和克服传统消费习惯的影响几个方面提出了政策建议。

The uncertainty caused by the errors of model and hypothesis belongs to unstatistical uncertainty.

由于模型假设与实际的误差所引起的不确定性属于非统计不确定性。

Both statistical uncertainty and unstatistical uncertainty exist on fatigue reliability analysis.

疲劳可靠性分析中存在统计不确定性和非统计不确定性。

Next, regarding question two, because present uses the injection contraceptive the method to maintain this population the stability, moreover already did not have the individual to move away or the situation which poaches, for this reason we transform this populations stability to ask this population every years newborn baby quantity to subtract this year death individual the quantity differential value; Moreover from this population year quantity with this year the end of the years quantity differential value, when tends 0, namely thought that this community individual quantity is stable, thus the question stability problem transforms to ask simple targets optimization problems model building; Carries on using MATLAB to the model obtains, obtains, when did not consider when uncertainty factor influence must inject the medicine female animal quantity is 276 heads, but when had considered after twin and by duplicate injection these two uncertainty factor influence, obtains must inject the medicine female animal quantity is 352 heads, including 110 are by the duplicate injection.

其次，对于问题二由于现在采用注射避孕药的方法来维持该种群的稳定，而且已经没有个体被运走或被偷猎的情况，为此我们把该种群的稳定性转化为求该种群每年的新生幼仔的数量减去该年死亡个体的数量的差值；另外从该种群年头的数量与该年年底的数量的差值，当趋于0时，即认为该群落的个体数量是稳定的，从而把问题的稳定性问题转化为求单目标的最优化问题建立模型；利用MATLAB对模型进行求得，得出当不考虑不确定性因素影响时要注射药物的雌性动物数量为276头，而当考虑了双胞胎和被重复注射这两个不确定性因素影响后，得到要注射药物的雌性动物数量为352头，其中有110头是被重复注射的。

In view of great uncertainty factors in the effect of shrinkage and creep, stochastic finite element method is applied to structural analysis. It can calculate the coupled stochastic response of uncertainty factors through randomizing input variables representing the stastics stochastic factors.

4考虑到收缩徐变效应分析中大量不确定因素的存在，本文引入随机有限元理论，通过对这些随机因素进行统计分析并作为输入变量，有效地计算模拟了不确定因素的混合随机响应。

Every company is faced with uncertainty of going-concern every time, and the difference is the degree of uncertainty. The failure of companies is not the rare thing but the frequent phenomenon.

正如竞争的非稳定性是市场常态，持续经营不确定也是企业的常态，任何一个企业在任何一个时点上都存在持续经营的不确定性（Boritz，1991），差别只是不确定的程度大小。

In order to evaluate measuring uncertainty of tensile testing result of metallic material, the mathematic model of calculating uncertainty is established and different factors of influencing testing result are determined taking rectangle head shorter proportional sample of 18mm Q235B plate as example.

为评定金属材料拉伸试验的结果测量不确定度，以轧制厚度为 18mm的Q2 3 5B板材矩形带头短比例试样为例，建立了不确定度计算的数学模型，确定了影响试验结果的下屈服力FSL、最大力Fm、试样原始厚度a及试样原始宽度b等各项因素，计算出了各种因素的标准不确定度，得出拉伸试验结果的扩展不确定度，并给出最终测量结果的表达式：下屈服强度ReL、抗拉强度Rm的最终测量结果分别为(3 0 5± 5 )MPa和(4 3 5± 10 )MPa。

In order to make the uncertainty of the dose index measurement in the head phantom reasonable for the medical diagnostic X-ray radiation sources of the computed tomography, the measurement uncertainty components were analyzed according to the mathematical model for the computed tomography dose index test method with a 100 mm ionization chamber.

摘 要：为了使医用诊断计算机断层摄影装置X射线辐射源在模体中的剂量指数测量结果的不确定度评定合理，基于用带有100 mm长杆电离室的积分剂量仪测量CT剂量指数的数学模型，对其测量不确定度来源进行分析，列出了方差、灵敏系数及标准不确定度的计算公式，从而给出了CT剂量指数测量的合成标准不确定度和扩展不确定度。

Thus, the paper perfects the 2D linear segment uncertainty ε(subscript σ) model in theory and makes it more scientific, and also provides a new way to study the space data uncertainty in GIS.

本研究完善了2维线元不确定性ε模型，使其更具有严密性，同时为GIS空间数据不确定性的研究提供了新的方法。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。