查询词典 direct method

Thermodynamic process of direct aluminium extraction from aluminium sub-sulphide, which is unstable and easily decomposed into Al and Al2O3 at a low temperature, was analytically studied. The temperature, at which alumina, FeS and carbon react to form aluminium sub-sulphide in different pressure, was evaluated with "Substance Gibbs' Free Energy Functional Determinant" method.

本文利用铝的低价硫化物在高温下存在，低温下不稳定容易分解得到金属铝的特性，从热力学角度引入"物质吉布斯自由能函数法"讨论在不同压力下，氧化铝、硫化亚铁与还原剂碳的反应生成低价硫化物的条件。

Gauss law and order eliminate Gauss out PCA elimination method is commonly used computers to solve linear equations in a direct way.

Gauss顺序消去法与Gauss列主元消去法是计算机上常用来求解线性方程组的一种直接的方法。

Solvable conditions for electrostatic problems using Gauss s law with direct integral method are presented.

给出应用高斯定理由直接积分法求解静电场问题时的可解性条件，用反例说明常见教科书中对此问题的表述是不完备的

The mitochondrial DNA cytochrome b gene sequences of 13 samples of gayal in China were sequenced by the method of direct sequencing and molecular phylogenetic tree was constructed based on cited sequences to analyzing its origin and phylogenetic status.

采用PCR直接测序法测定我国大额牛13个个体的线粒体Cyt b基因全序列，并引用其它牛种的序列资料共同构建分子系统树，以探讨大额牛的起源及其系统地位。

Some formulas of the weighted Moore-Penrose generalized inverse of the sum of two matrices are given under two different kinds of conditions, related existing results are extend and modified with a sample and direct proof method.

在两种情形下，利用矩阵的加权Moore-Penrose逆导出了两矩阵和的加权Moore-Penrose逆的公式，其推导证明简洁而直接，文中还给出两矩阵可以同时加权奇异值分解的充要条件，指出了J.K。

B Through theoretical and experimental studies, the paper investigats the relationships between hammer geometer and stress waveform generated by the hammer. After the mechanical meanings of linear model used by others are demonstrated, a simple expression of rigidity of an equivalent spring for direct impact between a hammer and a rod is obtained. Based on the above work, a mathematical model and numerical method for the impact of the hammer with progressively changing cross-section on the rod are presented.

2应用理论分析和实验研究相结合的方法，探讨了冲击应力波波形和冲锤形状尺寸之间的关系；阐明了冲锤与杆撞击局部变形的线性模型的物理意义，继而分析讨论了冲锤端头曲率半径与撞击弹簧刚度的关系；在此基础上，提出了连续变截面冲锤与杆撞击的数学模型和计算方法。

In Chapter 4, the pricing of Asian geometric average option under stochastic interest rates is studied, assuming CIR model for the interest rates. Asian option is strongly dependent with path, usually have a long duration, the movement of interest rates becomes more important in pricing such long-dated options. The CIR interest rate model not only considered the interest rate behavior has mean-reverting but also take into account that the fluctuation rate is direct proportion with the square root of its interest rate. Finally, the method of finite difference for the Asian geometric average option under CIR interest rate model is given.

第四章在利率满足CIR利率模型的假设下，研究了几何亚式期权的定价公式，亚式期权是强路经依赖性期权，通常有效期较长，在进行较长时期的投资时，利率的变化是非常重要的，CIR利率模型不仅考虑了利率行为具有均数回归的现象，而且还考虑其波动性的大小与利率大小的平方根成正比，最后给出了CIR利率模型下的几何亚式期权定价的有限差分法。

The drinking water is mankind existence of basic need, safety credibility of drinking water direct relation people crowd of mind and body health and life quality, relation arrive overall construction middle-class family society grandiosity target of realization, this text is from the village drinking safety existence of problem, become because of analysis, guarantee method 3 carried on to elaborate.

饮用水是人类生存的基本需求，安全可靠的饮用水直接关系人民群众的身心健康和生活质量，关系到全面建设小康社会宏伟目标的实现，本文从农村饮水安全存在的问题、成因分析、保障方法三个方面进行了阐述。

It is shown in this thesis that direct singular positions of parallel manipulators may be determined by using graphical method for velocity analysis.

中文摘要本研究使用速度分析的图形法以寻找3PPSR并联式机械手臂的正向奇异位置。

In Chapter 5, a new method with direct partitioned column updates of cholesky factorization for solving large scale sparse unconstrained optimization problems is proposed, which depends on a consistent partition of the columns and cholesky factorization of the Hessian matrix.

第5章基于稀疏Hesse阵的列的相容分划，并在其Cholesky分解的基础上建立了求解大型稀疏无约束优化问题的直接校正Cholesky因子算法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。