查询词典 retardation method

Four triatomic heterocyclic compounds, cyclopropane , oxa cyclopropane , ethyleneimine and thiirane were fully optimized utilizing Gaussian94 program package with a density functional theory method B3LYP and an ab initio method MP2 at 6-311 ++G** level, and the theoretical results agrees well with the reference data, which shows that this method is reliable.

使用Gaussian94程序包和密度泛函方法B3LYP以及从头算方法MP2在B3LYP／6-311++G**基组水平上，对4种三元杂环化合物环丙烷、环氧乙烷、环乙亚胺和硫杂环丙烷进行了全优化，其理论数据和文献数据符合得很好，这表明该方法是可靠的。

Four triatomic heterocyclic compounds, cyclopropane, oxacyclopropane, ethyleneimine and thiirane were fully optimized utilizing Gaussian94 program package with a density functional theory method B3LYP and an ab initio method MP2 at 6-311++G** level, and the theoretical results agrees well with the reference data, which shows that this method is reliable.

程学礼 ，赵燕云使用Gaussian94程序包和密度泛函方法B3LYP以及从头算方法MP2在B3LYP/6-311++G**基组水平上，对4种三元杂环化合物环丙烷、环氧乙烷、环乙亚胺和硫杂环丙烷进行了全优化，其理论数据和文献数据符合得很好，这表明该方法是可靠的。

In the aspects of research method, we took the method of preparing sol at first and then impregnating the wood to obtain ceramic-wood composite; this method made the wood use efficiently and increased the wood's weight gain percent. The ceramic-wood composite with performances of well decay resistance, dimensional stability, effloresce resistance and high strength was obtained by importing the cymene to the net of gel as the result of co-hydroxylation between MTES and TEOS. Making use of XPS ,we found that the apex of Si2p、O1s、C1s had evident chemical shift , which validated the existence of Si-O-C bonding.Key Words: Sol-gel, Ceramic-wood composite, Modified sol, Ecomaterials

在工艺方法上，采用先制备溶胶，然后浸注木材的工艺方法具有原料利用率高、提高增重率的优点；采用甲基三乙氧基硅烷和正硅酸乙酯共水解的方法，将甲基引入陶瓷化复合木材的凝胶内部，所制备的材料具有尺寸稳定性好、具有耐风化和耐腐朽性，强度高的特点；首次利用X射线光电子能谱，发现了Si2p、O1s和C1s谱峰发生了明显的化学位移，证实了Si－O－C键合作用的存在。

The governing equation of in-plane vibration of cable-restraint system is derived by means of D'Alembert principle, and then those partial differential equations are transformed into a set of ordinary differential equations by Garlerkin method. The method of Runge-Kutta integration is applied to solve the equation. The simulation analysis is made to prove that this vibration control has obvious damping effects and then the influence of cable tension, support mass, natural frequency and spring stiffness on the damping are discussed. Eventually, the approximate analytic solution of the optimum damping parameter is obtained to provide a simple and effective reference and design method for the engineers.

通过D'Alembert原理建立拉索－弹性约束系统振动方程，通过Galerkin方法将偏微分方程转化为常微分方程，应用龙格－库塔积分法求解方程；经过仿真分析，验证了该振动控制具有明显的减振效果，并且讨论了初始拉力、支座质量、振动频率及弹簧刚度对减振效果的影响；最后给出了计算最优阻尼参数的近似解析式，为工程师提供了简便有效的参考依据及设计方法。

This article examines the dairy industry in the light of the analysis frame of the industrial chain with industrial organization\'s SCP analysis model, the game theory analysis method, the value chain analysis method, the case analysis and the econometric analysis method and has carried on a systematically theoretical discussion of and the empirical analyses of five key links of the longitudinal dairying industry chain and their cooperation mechanisms.

本文把奶业纳入产业链的分析框架，运用产业组织的SCP分析范式、博弈论分析方法、价值链分析方法、案例分析和计量经济分析方法对乳业纵向产业链的五个主要环节及其协作链接方式进行了系统的理论探讨和实证分析。

After two evaluating method which the expert system are based on:evaluating method of structure damnification degree and bearing capacity evaluating method.

桥梁评估专家系统，是利用计算机模拟专家的决策机理，对既有桥梁进行综合评估的方法。

Extracted the characteristics of excitation inrush current to establish a new identification method. This method has strong robustness for TA saturation, theoretical analysis and MATLAB simulation experiments indicated that the principle will not be affected by the TA saturation,*** and effective, and avoided the faults that hardware requirements of high and computation in the method of traditional accurate measuring the dead angle of excitation inrush current.

提取励磁涌流的特征量，并以此建立识别励磁涌流的新方法，该方法对TA饱和具有很强的鲁棒性，理论分析和MATLAB仿真试验均表明该原理不受TA饱和的影响，简单有效，避免了传统精确丈量励磁涌流中断角的方法对硬件要求高及运算量大的缺点。

By making comparison between three-step method and four-step method of Gram stain,the author found that the stain progress of three-step method is simple,and is easy to hold decolor time.

对革兰氏染色三步法和四步法进行了试验比较，发现三步法染色过程操作简单，脱色时间易于掌握，便于学生操作和控制，且染色效果较好，明显提高了实验效率，值得在教学中推广使用。

Three methods for the computation of the isotropic tensor function,spectral decomposition method,eigenprojection operator method and representation theorem method,are compared.Different approaches to calculate the eigenvalues and their corresponding eigenvectors are also discussed.As an example,the exponent tensor function is calculated.

对计算各向同性对称张量函数的3种方法(谱分解法、特征投影算子法和表示定理法)进行了分析比较，同时也对如何计算特征根与特征向量的技巧进行了探讨，并利用3种方法对指数张量函数进行了实例计算。

In the video segmentation method based on DEMD, the intrinsic mode function with the lowest frequency is discarded and a simple and effective motion compensation method is adopted. As a result, the video segmentation method is no longer sensitive to abrupt change of luminance, object motion in shots, motion and zoom in/out of cameras, so that the precision of detecting shot boundaries is improved.

基于DEMD的视频分割方法除去视频帧中反映图像内光照分布与能量的最低频率固有模态函数(intrinsic mode function，IMF)分量，并选择一种简单有效的运动补偿方法，解决了传统基于直方图方法对光照突变、镜头内物体运动和镜头运动及拉伸的敏感问题，减少了镜头边界识别的误检率，在保证召回率不受影响的前提下提高了视频分割的精确度。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。