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This paper takes a new interval method to study static analysis problem of interval truss uncertain structure.

本文采取了新的区间分析方法研究分析区间参数非确定性桁架结构的静力分析问题。

Recently, the interval analysis method has been used to deal with the static displacement and eigenvalue analysis of the uncertain structures with interval parameters.

最近，区间分析方法被用于具有区间参数的不确定性结构的静态位移和特征值的分析。

For the present,there are three kinds of uncertain analysis methods:stochastic analysis method, fuzzy analysis method and interval analysis method.

针对桥梁结构分析中的各种不确定性问题，对其进行了归类分析，给出了目前不确定性分析中的三种方法——随机分析方法、模糊分析方法和区间分析方法；对三种不确定性分析方法在桥梁结构分析中的应用领域进行了综述，并对三种方法的适用情况进行了分析说明。

For the present,there are three kinds of uncertain analysis methods:stochastic analysis method,fuzzy analysis method and interval analysis method.

分析这些不确定因素如何影响桥梁结构及其影响程度，对桥梁的设计、施工和维护则极为重要。

In this paper, interval reliability of uncertain structures is studied.

本文研究了不确定结构的区间可靠性分析方法。

But in the real word, the programs we meet are in uncertain as Well as certain, or intervenient, so in practice we need combine with GIS and ES and establish intelligent GIS system.

然而，在实际工作中，我们遇到的大量问题是既有确定性的，也有非确定性的，或介于二者之间。

Propose a method to estimate the maximum robust invariant set of linear plants with control saturation and structural uncertain block.

并且对具有有界干扰的系统，进一步扩展上面条件，给出了干扰条件下系统的鲁棒不变子集计算方法。

Uncertain time-delay systems ; invariant ellipsoid set ; model predictive control ; stability

不确定时滞系统；不变椭圆集；预测控制；稳定性

The article mainly analyzes how innovation affects the social welfare and makes some conclusions as follows: firstly, influences on the price and output of products of innovation by oneself are uncertain, but innovation can enhance social welfare when it reduces the product price or raises the price but diminishes the elasticity of inverse demand curve.

本文重点分析了企业创新对社会福利的影响，得出的主要结论如下：（1）独立创新对产品价格和产量的影响是不确定的，但当创新使产品价格下降或者创新使产品价格上升且使反需求曲线的弹性变小时，独立创新能够增加社会福利；（2）联合创新能够降低每个企业的成本，增加企业的研发开支、产量和利润，因而联合创新有利于社会福利；（3）在考虑了创新的溢出效应后，存在一个外溢比率的帕累托最优区间，但我们必须在创新激励与社会福利之间做出权衡。

Because of the unstructured environments and the force impulse excitation of the following manipulators, the invertibility control input can not control the conducting manipulator exactly. In this paper, a new adaptive and sliding mode control scheme is developed assuming that all system parameters including the joint flexibility values are uncertain but within given bounds.

在以上方法的基础上，本文再对多杆柔性关节机械手在约束空间的轨迹优化规划问题进行了研究，首先利用坐标转换得出多杆柔性关节机械手的约束动力学模型，然后利用逆系统方法求出了系统在约束空间的次优化轨迹及力控制器。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。