反

In order to achieve the stochastic inversion scheme, the stochastic approximation expectation maximum algorithm is introduced, the inversion at each iteration, the automatic modification of the statistical parameters to speed up the computing speed, improves accuracy and stability of the inversion.

为了实现所提出的随机反演理论，引入了随机近似最大期望算法，在反演的每次迭代后，自动修改各统计参数，加快了计算速度，提高了反演精度和稳定性。

Then, the result from the least square method is used as initial values of elastic visco-plasticity parameter. The Kalman Filtering stochastic back analysis is carried out.

利用最小二乘目标函数对边坡岩体弹-粘塑性参数进行了确定性反分析计算，并将反演结果作为参数初始值进行了岩体参数的Kalman滤波随机反分析计算。

The simplicity and straightforwardness of the works are what the artist recovered from history.

重新回到历史的刘建华这次展出的作品是简单的，直接的，是对当代社会、政治视觉疲劳症的强烈反应，这批作品明确地用美的方式表达出反内容、反关系、反社会介入的态度与立场。

On the base of the reverse engineering and surveying theory, taking the advantage of measurement equipment and Surfacer which is a reverse engineering software, studying on the optics measurement technique of structured light, this paper has put forward the detailed method of three-dimensional measurement on dental cast, obtained its data by experiment and proceeded them.

本文在反求工程理论和测量理论的基础上，以测量设备及反求工程软件surfacer为手段，研究了激光三维测量技术，给出牙颌三维测量的具体实现方法，通过实验获得牙颌数据，并利用反求软件处理所测得的数据。

This paper gives the concept and some properties of partition symmetric anti-circulate matrix, and the sufficient and necessary condition is discussed.

给出了分块对称反循环矩阵的概念，讨论了分块对称反循环矩阵的性质，给出了分块对称反循环矩阵的若干充分必要条件。

In this dissertation, firstly, a transmission electron microscopy investigation has been conducted on the domain structure in strontium bismuth tantalate (SBT∶SrBi〓Ta〓O〓), which is the first mentioned fatigue-free material.

首次观察到除了在疲劳材料如PbO〓中存在的90°畴界和180°畴界以外，还存在有新的畴结构：反相畴，90°反相畴和180°反相畴。

5Topological inversion is applied to solve the transition problems from topological graph to practical gear train mechanisms. Four variant directions of topological inversion is noted and topological inversion chart library is founded.

5运用拓扑反演解决了由轮系拓扑图过渡到实际轮系机构的转换问题，指出拓扑反演的四个变化方向，建立了周转轮系的拓扑反演图库。

The following results are made from this research: Assessing data quality and band combination of different bands in line with geo-target features in desertification areas, and determining basic bands for desertification monitoring. And understanding and studying the spectral features and variation rules of geo-targets in the experimental area, raising that it is the basis of geo-targets information collection with imaging spectrometer data to understand spectral features and variation rules of geo-targets, realizing that in a great extent spectral-integrated-form-based classification method can remove the phenomenon of "different spectrum with same objects" resulted from reflection ratio curve translation because of the angle change among sensor, targets and observation direction, and the average and variance images can be introduced to solve the problem of two kinds of geo-target with similar spectral forms and much different values of whole reflectionratio. It is suggested that "red edge" range bands of vegetation, which has close relationship with vegetation cover and biomass, is the main characteristic bands and important basis for careful vegetation classification and quantitative retrieval, and pixel-based derivative spectral analysis is very useful for removing the effects of soil background values and quantitatively retrieving vegetation biomass and cover. The remote sense quantitative retrieval model is developed for main appraisable factors of desertification monitoring assessment with imaging spectrometer data and then the applicability of model is analyzed.

研究结果如下：首先针对荒漠化地区的地物特征，对高光谱数据不同波段的数据质量、波段组合进行了评价，提出了适用于荒漠化监测的基本波段选择集；初步了解和掌握了研究地区的地物光谱特性及变异规律，进一步明确了掌握地物光谱特征和变异规律是用成像光谱仪数据提取地物信息的基础；发现了基于光谱整体形状的分类方法在很大程度上能够消除由于传感器、地物目标观测方向之间的角度变化引起的反射率曲线整体平移的"同物异谱"现象，对于谱形相似而整体反射率的值相差较大的两类地物，通过引入均值和方差图像参与分类得到解决；研究还表明在植被"红边"范围内的波段是进行荒漠化监测的主要特征波段，这些波段与植被生物量和盖度都有密切的关系，是开展精细植被分类研究和植被定量反演的重要基础；像元的导数光谱分析可以消除土壤背景的影响，是进行植被生物量和盖度定量反演的有力工具；建立了荒漠化监测主要评价因子的定量反演模型，并分析了模型的适用性。

At first, in this paper, the concept and type were introduced; afterwards, how to apply counter-examples in the higher mathematics was expatiated particularly in such aspects: concept、theorem、rule、formula and distinguishing true and false of the proposition; Finally, the construction of counter-examples was explored using special example、character、the method of approach as well as intuitional geometrical graphics.

本文首先简要介绍了反例的概念和类型；然后从概念、定理、法则、公式以及判别命题真假等几个方面，详细阐述了在高等数学中如何应用反例；最后，从利用特例、性质，采用逼近的方法以及直观的几何图形几个方面探讨反例的构造。

The change phase is estimated by window and interpolation algorithm, and then a phase compensation function can be built accordingly. By multiply this function and the data sequence from the IFFT of the truncated data sequence spectrum in the time domain, the spectral leakages can be compensated when the new data sequence is transformed into the frequency domain by the DFT.

利用加窗插值的方法估计出该变化的相位，并利用估计结果构造出一相应的反相位函数，在时域上将这个反相位函数与由傅立叶反变换产生的离散序列相乘，得到新序列再通过一次傅立叶变换就可达到频谱校正的效果。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。