查询词典 numerical analysis

The result of the test was consistent with the result of numerical simulation very well .This shows that numerical method is viable to the tangentially fired boiler using the commercial software FLUENT .

同时对锅炉试验模型流场的测量，表明得出的锅炉屏区气流速度分布与数值计算结果吻合良好，这说明运用FLUENT 软件对四角切圆燃烧锅炉进行数值模拟是可行的。

Based on the synthesizing of the present achievements of numerical algorithm, thermotics, welding mechanics and creep theory, the numerical simulation of mechanical behavior and processing parameters for the local PWHT is achieved in this dissertation.

本文综合了数值算法、焊接传热学、焊接热力学和蠕变理论的成果实现了局部热处理过程力学行为和工艺参数的计算机模拟。

Numerical simulation to three-dimensional turbulent flow in multistage axial compressor blade row is carried out, where high resolution third-order ENN scheme is adopted to catch the shockwave and simulate the turbulent flow correctly, and LU-SGS implicit method is chosen to improve computation rate. A nicety and high efficiency numerical simulating system is thus constructed.

对多级轴流压气机叶栅内三维紊流流场进行数值模拟，采用高精度高分辨率的三阶ENN格式以保证对激波的捕捉和对紊流特征的正确模拟，利用LU-SGS隐式解法提高了计算速度，从而构成了一种既准确又高效的多级跨声速轴流压气机紊流流动数值求解系统。

In order to improve accuracy and avoid the breakup while computing, we introduce the function transformation and variable transformation of the numerical solution into it, and this also guarantees dependability of the numerical result.

为了提高计算精度、避免计算过程出现崩溃，我们引入了数值解的函数变换和自变量变换的方法，这也保证了数值结果的可靠性。

Beginning with wave equation, the paper has deduced the propagation of gauss pulses in single mode fiber and fiber grating transmission compensation. The characteristics of cascaded phase-shift gratings are discussed by numerical simulations of coupled-mode theory and T-matrix method. The experimental works and measurement results are shown in this paper. On the other hand, we have introduced the basic theory of EDFA and figured out the characteristics for EDFA at different conditions by numerical simulation. Some experimental results for EDFA are also presented here. In this article, you can find the influence on Optical Fiber Amplifier by Gain Tilt, especially, the negative effect on CSO in CATV transmission system.

论文首先从波动方程入手，对高斯脉冲在单模光纤中的传播演化及光纤光栅透射补偿进行了详细的研究；较系统地介绍了光纤光栅的耦合模理论，并将传输矩阵计算法用于计算级连相移光纤光栅的光学特性；重点介绍了作者在光纤光栅刻制及特性测量方面所做的一些实验研究工作；较系统介绍了EDFA的基本理论，计算出各种条件下EDFA的光学特性，并进行了一些实验研究；综合分析光纤放大器对光纤传输系统的影响，特别分析了光纤放大器增益不平坦对光纤CATV系统中CSO恶化的原因及其解决方法，并研究了光纤布拉格光栅在稳定980nm泵浦源输出功率和输出波长方面的应用；结合一个基于光纤光栅和光纤放大器的光纤用户接入网方案，对光纤用户接入网的若干问题进行了理论与初步的实验研究。

Triple integral expression of the radiation impedance of square piston is deduced and the numerical results of the radiation impedance are calculated with the method of Gaussian numerical integral.

利用高斯数值积分方法，推导了方形活塞辐射阻抗的三重积分表达式，计算了方形活塞声源的辐射阻抗。

Comparison of numerical results with analytical ones and uniaxial tension verification show that our numerical approach is accurate and effective.

通过与解析解的对比以及简单加载下的实验验证，本文的算法正确、有效。

NC simulation software is applied in numerical controlled experiment,it has enhanced the unideal results and low efficiency of the experimental sector in the teaching of numerical controlled course.

在数控实验中，数控仿真软件的应用，改善了目前数控技术课程教学中实验环节效果不理想、效率较低的现象，提高了学生数控编程能力、数控机床的操作能力及系统的维护能力

The astringency, error and stability of the numerical method are researched. Zero matrix method, constant matrix method, and Jacobian matrix method are constructed in order to improve numerical precision and efficiency.

研究了所提数值计算方法的误差、稳定性、收敛性等数学性质，在计算精度和计算效率两方面提出了一些改进措施，构造了零矩阵法、常数矩阵法、雅可比矩阵法等计算格式。

Gemetria, which consists in the use of the numerical values of the letters of a word for purposes comparison with other words, which give the same or similar combinations of numbers: thus in Genesis 49:10,"Shiloh come" is equivalent to 358, which is also the numerical value of Mashiah, whence it is inferred that Shiloh is identical with Messias; the Notarikon, or process of reconstructing a word by using the initials of many, or a sentence by using all the letters of a single word as so many initials of other words; for instance, the word Agla is formed from the initials of the Hebrew sentence: Thou Mighty forever.

，其中包括在使用数值价值观的信一个字的目的比较换句话说，使相同或相似的组合的号码：因此，在创世记49：10 ，&希洛来&等於358 ，这也是数值Mashiah ，何处这是推断，希洛是相同的弭赛亚；的Notarikon （拉丁文notarius ），或重建过程中的一个字的开头字母使用了许多，或一个句子使用的所有信一个字为如此众多的缩写换句话说；举例来说，这个词是Agla的开头字母组成的希伯来文的句子：你条坚强的永远。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。