层理论的

However,authors still do not find the relevant references on convergence and symmetric problems of the semi-analytical solution.Based on the semi-analytical solution for Hamilton canonical equation theory,the formulations of the clamp and simply supported and symmetric boundary conditions on the Hamiltonian element are derived by the variational principle.Several numerical examples show that with increase of meshes,the convergence rate of the semi-analytical solution is faster than the convergent rate of traditional finite element method based on displacement.

①在厚度上没有任何位移和应力模式的假设，由于传递矩阵方法的引入，从理论上讲，不受板壳厚度或层合板壳层数的限制；②采用弹性力学的Hamilton正则方程半解析法，可以克服边界的局部化效应[8]；③由于在平面内或圆柱壳的曲面内采用了有限元法，所以一般的板壳问题不受结构侧面边界条件的限制，在复杂工程板壳问题上具有广泛的应用领域。

Results have theoretical significance to the design and optimization of cladding parts and to more applications of the cermet cladding material.

文中的研究结果对金属陶瓷硬质覆层零件的设计、优化以及金属陶瓷硬质覆层材料的进一步推广应用具有重要的理论指导意义。

In order to find a powerful assistant computation tool for further analysis and design of multilayer optical coatings,an analytical model is mathematically established for accurate calculation of the first and second derivatives of the spectral coefficients of multilayer optical coatings with respect to layer parameters like thickness,real refractive index and extinction coefficient. It is based on the matrix theory of calculating the spectral coefficients of multilayer optical coatings and is achieved by perfectly using the trace operation of matrix.

为了寻找一种膜系深入分析与设计的有力辅助计算工具，从光学薄膜光谱系数的矩阵计算理论出发，基于对矩阵求迹运算的巧妙运用，从数学上建立了准确计算膜系光谱系数关于膜层几何厚度、实际折射率和消光系数等膜层参数的一阶和二阶偏导数的解析模型。

Then, using the reasoning matrix between the unit colors and individual colors of the polychromatic sets, the reasoning and generation of geometric tolerance types are achieved.

介绍了各层的意义和各层之间的关系，利用多色集合理论对该模型进行描述，通过多色集合统一颜色和个人颜色的推理关系矩阵，实现了计算机辅助形位公差类型的推理生成，为计算机辅助形位公差类型推理的进一步形式化打下了基础。

In the theory and experiment for application, rectifying characteristic, CMR and photoemission of hetrojunction are investigated.

五。在应用的理论和实验探索上研究了氧化物异质结的整流、磁电阻及光电效应；从理论上研究了由三铁磁层组成的隧道电阻效应和结构的关系。

An infrared/radio frequency dual-mode dichroic beam combiner with multilayer slab configuration is designed, which is based on thin film interference theory. It can combine broad wave band beams in 2D and large-angle. Then, the theory of the reflection rate of IR is analyzed and the transmission rate of RF and some calculated results are given.

利用薄膜干涉理论设计了多层结构的红外／微波波段波束合成器，实现了在二维平面大角度范围内对宽频段波束的合成，并对这种结构对红外的反射率和对微波的透射率进行了理论计算和分析。

In chapter 3, prediction theory of time series is reviewed, then non-linear autoregressive model of time series-feedforward neural networks is presented, at the same time a new method-SVD is proposed to design the architecture of feedforward neural networks. By using a trained network with a sufficient number of hidden nodes, according to the distribution of singular values of hidden nodes outputs, we can decide the optimum number of hidden nodes, then the reduced network will be retrained.

第三章：先回顾了时间序列的预测理论，提出了时间序列的非线性自回归模型-前馈神经网络模型，并提出了一种设计前馈神经网络的新方法-奇异值分解法，初始网络结构足够大，网络训练后，对网络隐层节点输出所形成的矩阵作奇异值分解，根据奇异值分布情况，决定网络隐层节点的个数，优化后的网络重新开始训练。

The structures of the intercalates formed by reaction of four guests with Zn, Al-HTlc were characterized by XRD and IR techniques. And the charge density on the oxygens of each of the carboxylate groups for each of the four anions was investigated utilizing ab initio (HF/6-31G) method by G98w. The orientation of 1,2-,1,3-,1,4-benzenedicarboxylate or benzenecarboxylate anions between the layers was also proposed.

利用XRD和IR测试技术对样品结构进行表征，UV及HPLC对有机酸的反应量进行定量，并采用Gaussian-98软件包中ab initio分子轨道法(HF/6-31G)计算了各有机酸阴离子的分子结构，分析了其结构与插层行为的关系，并理论结合实验给出了各有机酸阴离子在锌铝类水滑石层间可能的空间构型。

So people make great efforts to inspect the carburized materials in NDT perfectly. In this thesis, the characteristics of carburized layer and ECT system were studied by numeric simulation and finite element method.

本文运用数值模拟、涡流检测和有限元分析等方法对材料的渗碳层特性及其无损检测问题进行了系统研究，为渗碳层深度的涡流检测及材料表面改性质量的无损评价提供了重要的理论依据。

Based on these studies,the technique of preparation process was set and optimized.Lots of 2 kg,20 kg,2500 kg activated carbon were prepared and used in trial to produce DESC with 0.047-1.0 F SEC.Results showed that the activated carbon met the demands.This study offered theoretical basis and feasible technique for domestic production of DESC plate materials.

在此基础上确定和优化了制备技术路线并分批制备了2、20、2500 kg的活性炭，经使用单位试制静电容量0.047-1.0法拉双电层电容器表明，所研制的活性炭满足要求，为双电层电容器的电极板材料国产化提供了理论依据和可行的技术路线。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。