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表示向
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     A NEW METHOD OF CONVERSION FROM FEATURE REPRESENTATION TO BOUNDARY REPRESENTATION
     基于集合运算的特征表示向边界表示转换新方法
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     The thesis presents an efficient scheme for using GAG system to develop ADA FRONTEND compiler which has the function to construct DIANA tree. With this aim. a deep research is made on DIANA GENERATION part in the input file of GAG depending on the basic principle about GAG and the basic theory on AG, and DIANA tree internal representation is designed and an implementation way is provided from DIANA tree internal representation to external representation.
     用GAG的基本原理和属性文法的基本理论,对GAG输入文件中的DIANAGENERATION部分作了研究,提出了一种用GAG开发具有生成DIANA属性树功能的ADA前端编译器的实现方案,并对DIANA的内部表示进行了设计,给出了一种从DIANA内部表示向外部表示转换的方法。
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  “表示向”译为未确定词的双语例句
     Concrete work includes mapping from EXPRESS to Java, extracting feature information using Java class or function, display the feature information in form of information tree.
     具体工作包括:首先完成数控程序的EXPRESS表示向Java表示的映射,然后再利用Java提供的类或函数,对数控程序进行解析,并以树状显示。
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     The first and second nearest-neighbour relaxations for Al are found to be (1.61, -0.32), expressed in percentage of normal distances. The positive sign indicates relaxation toward the vacancy and the negative sign indicates relaxation away from the vacancy.
     首先求得铝中空位的第一和第二最近邻的位移百分率各为1.61和-0.32,这里的正号和负号各表示向空位移进和移出。
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     Some methods for processing conversion problems are reviewed in this paper, on the basis of set operation, a new method that can quickly reconstruct shape is discussed, and then the conversion can quickly carry out only by topological traverse.
     本文回顾了几种表示转换方法,在集合运算的基础上,提出了一种适合于特征编辑修改的形体快速重构方法,从而可快速地实现特征表示向边界表示的转换。
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     In this article, we attempted to use the Topic Map as the resource description model. We described the action of the topic map for Web information organization and explored how to map XTM to the formal logic and how to implement the logic inference supporting based on Topic Map.
     以 Topic Map主题地图作为语义 Web信息描述模型 ,阐述了 Topic Map在 Web资源组织中的作用和地位 ,研究了 TM结构化知识表示向形式化逻辑的映射机制 ,以及基于 TM的知识推理的实现
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     First of all,when the five-dimension reduction representation with the five d orbits wave-functions as the base functions is converted to an un-reduction representation,the energy splitting in tetrahedron crystal field can be obtained.
     首先利用群论,将Td点群中以五个d轨道为基函数的五维可约表示向不可约表示约化,得到d轨道在正四面体场中的能级分裂;
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     Wavelet Representation of Feedforward Neural Network
     前神经元网络的子波表示
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     Parameter Representation of Isotropic Vector and Property
     迷量的参数表示及其性质
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     The Representations of F-L Sequences
     F-L序列的表示
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     The Representation of Measures of Fuzziness
     模糊度的表示
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     Errors in Y axis
     Y偏差
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  representation to
For the zero equilibrium of a nonlinear system admitting quasilinear representation to be exponentially stable in large, it is sufficient that the characteristic polynomial of a special matrix have constant coefficients and be Hurwitz.
      
Thus we extend the Boukas representation to a bigger algebra, which is generated by creators, annihilators, and number operators.
      
The application of the new representation to the calculation of nonlinear effects and electron scattering by an atom in a field are discussed
      
We use this matrix representation to obtain the corresponding eigenvalues and their nearest neighbor spacing distribution.
      
Then, higher order statistics motion analysis is applied on the 2-D mesh representation to get an initial motion detection mask.
      
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Consider the crystal containing a small fraction of vacancies as a homogeneous crystal, and the difference between perfect and imperfect crystal reduces to the modification of the potential function. The relation between the rate of change of the elastic constants, c11 and c12, and concentration of vacancies is derived by the use of a Morse function. Owing to the relaxations of the neighbouring atoms, the effect of the elastic constants on the change of mutual interactions due to vacancy relaxation is taken...

Consider the crystal containing a small fraction of vacancies as a homogeneous crystal, and the difference between perfect and imperfect crystal reduces to the modification of the potential function. The relation between the rate of change of the elastic constants, c11 and c12, and concentration of vacancies is derived by the use of a Morse function. Owing to the relaxations of the neighbouring atoms, the effect of the elastic constants on the change of mutual interactions due to vacancy relaxation is taken into account. The first and second nearest-neighbour relaxations for Al are found to be (1.61, -0.32), expressed in percentage of normal distances. The positive sign indicates relaxation toward the vacancy and the negative sign indicates relaxation away from the vacancy. In the case of Cu, it is estimated that 1 per cent vacancy concentration would decrease the elastic constants by 1.3-1.4 per cent. However, the vacancy would have less effect on the elastic constants in Al than in Cu.

认为具有少量空位的晶体是一个均匀的晶体,把完整与不完整晶体的区别,归结为势函数的修改。应用Morse函数推导出弹性常数c_11和c_12的变化率与空位浓度的关系。因为空位邻近的原子有松弛,考虑了由松弛而改变了的相互作用对弹性常数的影响。首先求得铝中空位的第一和第二最近邻的位移百分率各为1.61和-0.32,这里的正号和负号各表示向空位移进和移出。其次,进行了具体的计算,在铜晶体中,估计1%的空位浓度使弹性常数减小1.3—1.4%。然而,铝晶体中的空位对弹性常数的影响要比铜晶体小。

Let G be a group of order h and the representation of group elements g1,g2,·gh, on X space spanned by basic vectors x1,x2,·Xh be regular, we can artificially constitute a Hermitian operator (matrix) A, which commutes with all the elements in group G, and solve the eigeaequation of A. The regular representation can then be broken down into irreducible form and all the projection operators of irreducible representation in G is obtained. It is a basic work to simplify quantum chemistry calculations by using group...

Let G be a group of order h and the representation of group elements g1,g2,·gh, on X space spanned by basic vectors x1,x2,·Xh be regular, we can artificially constitute a Hermitian operator (matrix) A, which commutes with all the elements in group G, and solve the eigeaequation of A. The regular representation can then be broken down into irreducible form and all the projection operators of irreducible representation in G is obtained. It is a basic work to simplify quantum chemistry calculations by using group representation theory and an example for the solving of complex group theory problems by means of computer aided design.

假设G是一个h级的分子点群和群元g_1,g_2…g_h,作用在由基本矢量x_1,x_2…x_h,组成的X空间的矩阵表示是正规表示,我们构成一个与所有群元均对易的矩阵A并对A求解本征方程,可使正规表示向不可约表示完全约化,得到G的所有不可约表示的投影算符,它是用群表示理论简化分子体系有关计算的一项基础工作,也是借助于计算机辅助设计解决群论中困难而复杂问题的一个例子。

The relation between the degree of polymerization and the type of initiation as well as the relation between the polymerization degree and the chain transfer for butadiene polymerization under molybdenum and iron catalyst systems were studied. Time graph was suggested to be used to determine the type of initiation if there exists chain transfer reaction. For slowly-initiated non-steady state polymerization, it was proposed that the main chain transfer be decided in the quasisteady state period. Identical results...

The relation between the degree of polymerization and the type of initiation as well as the relation between the polymerization degree and the chain transfer for butadiene polymerization under molybdenum and iron catalyst systems were studied. Time graph was suggested to be used to determine the type of initiation if there exists chain transfer reaction. For slowly-initiated non-steady state polymerization, it was proposed that the main chain transfer be decided in the quasisteady state period. Identical results were obtained by using graphical integration and the ratios of equal rates methods to deal with the data. Theoretical analysis was presen-.ted to provide the feasibility of the ratios of equcl rates method.

本文分别研究了MoCl_2(n-C_8H_(17)O)_2-(i-Bu)_2Aloph体系,Fe(naph)_2-Al(i-Bu)_3-CH_2=CHCH_2Cl体系催化丁二烯聚合反应中聚合度与引发类型,聚合度与链转移的关系.建议用聚合度-时间曲线来决定是快引发还是慢引发,判断链转移反应的存在.对于慢引发非稳态聚合反应,提出选择准稳态来决定主要的链转移反应.并分别用图解积分法与等速比法处理数据,两种方法得到一致结果. 对等速比法的正确性从理论上进行了分析、采用链转移强度因子T_i表示向i组分转移的程度,并以比值φ_1=T_i/T表征第i种链转移剂的转移能力.

 
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