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In 1986, R.D.Cook proposed differential geometry to assess local influence of minor perturbations of linear statistical models. Poon and Poon(1999) constructed a conformably invariant curvature , the conformal normal curvature, for the same purpose.

Cook(1986)用微分几何的方法评估了线性统计模型微小扰动的局部影响，Poon and Poon(1999)改进了Cook提出的统计曲率概念，定义了保形法曲率。

In one case, however, a baseline scenario was constructed by using a geographic information system and remote sensing techniques, and a multiple sea level rise approach with three climate change scenarios – low (0.2 m rise), moderate (0.5 m rise) and high (1 m rise)– to offset data limitations and to account for uncertainties associated with topographic perturbations.

但是，仅在一个情况中，使用了地理信息系统和遥感技术来建构基线情景，用带有三种气候变化情景――低(上升0.2米)、中(上升0.5米)和高(上升1米)――的多海平面上升情景办法来弥补数据方面的限制，并考虑到与地形扰动相关的各种不确定性。

And,the study of propagation properties of open-circuit gray solitons indicates that they are relatively stable under perturbations at least less than 10%.

同时采用波传播的数值解法，分析了它们的传播特性，结果显示它们在小于10％的扰动下是相对稳定的。

For preventing the control system from system uncertainties and external perturbations the robust sliding mode controller is designed to guarantee the system to trace the optimal trajectory.

在实施非线性控制中，本文首次将δ算子及其在频域上对应的〓变换引入到汽车电子控制领域。

This paper is composed of three chapters, which respectively discusses the following impulsive delay difference equations with discrete variables and continuous variables:In chapter 1, we investigate the oscillation and nonoscillation of equation and some sufficient conditions for oscillation and nonoscillation are obtained. Consequently we extend these results to the difference equations with several delays and with nonlinear impulsive perturbations and with variable delays respectively.

本篇论文由三章组成，分别讨论下面四类具离散变量和连续变量的脉冲差分方程这里p≥0，Q＞0，当n∈N(0)时；p∈C(-1，∞)，R~+，Q∈C

In addition, the simulation tests the robust performance of controller for parameter uncertainties, in which a variety of parameter perturbations are added in.

另外，通过在仿真中加入多种参数摄动的方法，检验控制器对参数不确定性的鲁棒性。

In order to detect the strong influence points in attribute sequence, this paper introduces the perturbation theory of autocorrelation function in the mean time having several minute perturbations.

为了探测时间序列中的强影响点，介绍了同时对几个点作微小扰动时自相关函数的扰动理论。

As a result of conservative perturbations, the first order Melnikov function for a perturbed system is identically equal to zero, so the second order Melnikov function has to be considered. The perturbation parameters which make no use in the first order Melnikov function may be important in the second order Melnikov function.

此时一阶Melnikov函数恒等于零，必须考虑二阶Melnikov函数，而在一阶Melnikov函数中不起作用的扰动参数在二阶Melnikov函数中却起着非常重要的作用，因此扰动部分极为复杂。

Rather than being perturbations to the carbon cycle, widely reported decreases in 13C/12C in Neoproterozoic carbonates are more easily interpreted in the same way as is done for Phanerozoic examples.

被广泛报道的新元古代碳酸盐中13C/12C比例的下降并非是碳周期的波动，它们更容易通过与显生宙样品类比来理解。

In order to analyze the robustness of a system under structured perturbations, Hinrichsen Pritchard et al have introduced the notion of stability radius.

为了衡量一个系统在结构扰动下的鲁棒性，Hinrichsen、Pritchard等人引入了稳定半径的概念。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。