应用数学

In order to measure jitter of gain-switched laser precisely, we analyze theoretically the math model and measurement principle of harmonic spectrum analysis used to measure laser pulse jitter.

为了能够精确测量增益开关激光脉冲的抖动，应用傅里叶变换和自相关函数，理论分析了谐波频谱分析法测量激光脉冲抖动的数学模型、测量原理，修正了David A。

In this dissertation, digital lock-in detection techniques under integer period sampling and non-integer period sampling are separately investigated (1) Under integer period sampling, digital signal sequence is acquired through sampling the measured signal, but digital reference sequence is acquired through mathematical operation, then digital lock-in detection can be realized by calculating crosscorrelation function of digital signal sequence and digital reference sequence Harmonic measure is also analyzed, and a method of measuring harmonic of a periodic signal under aliasing is put forward.

本文对使用采样ADC把模拟信号转换为数字信号并通过计算数字信号的相关函数来实现锁定检测的技术进行了研究，在此基础上设计了一个多功能的数字LIA并在一些科学实验中进行了应用。本文对整周期采样和非整周期采样时的数字锁定检测技术分别进行了研究。(1)在整周期采样时，对被测信号进行采样得到信号序列，而参考序列由数学运算得到，通过计算信号序列和参考序列的互相关函数就可实现锁定检测。

An unsteady aerodynamic model based on Fourier analysis is developed in the frequency domain with the theory of system identification and the experimental data of large amplitude harmonic oscillation. This unsteady aerodynamic mathematical model is used to extract dynamic derivatives, and the meaning of a time-lag loop is analyzed.

应用系统辨识理论，利用纵向大振幅非定常气动力实验数据，在频率域内建立了基于Fourier变换法的非定常气动力数学模型，并发展了一种获取常规动导数的仿真实验方法，分析了迟滞环的物理意义。

The model can be used without calculating the change of boiler heat absorption.

该计算模型针对不同型式的加热器进行了讨论，并给出了具体的数学表达式，应用时不需要单独计算压损变化对锅炉吸热量的影响。

Application of fuzzy mathematics in differential diagnosis of the epidemic hemorrhagic fever.

模糊数学在流行性出血热鉴别诊断中的应用。

MatLab the book from the start of basic knowledge in detail on the various orders, to the readers of MatLab in higher mathematics, linear algebra, symbolic operation, graphics and image processing. data processing and the application of the external interface design.

本书从MatLab的基础知识入手，在详细介绍各种命令的同时，向读者介绍了MatLab在高等数学、线性代数、符号运算、图形图像处理、数据处理等方面的应用和外部接口程序设计。

Function value of the solution and apply early have higher mathematics involved, it is difficult is the key.

函数最值的解法和应用在初高等数学中都有涉及，它既是重点也是难点。

Notable examples are the development of category theory, which provides a useful framework for a large part of mathematics, homological algebra, and applications of model theory to algebra.

比较明显的例子是范畴论的发展，范畴论对数学，同调代数，以及模论在代数上的应用都提供了一个十分有用的框架。

First, attribute value matrices are transformed into fuzzy relationship matrices according to the theory of fuzzy mathematics,and then by combining the fuzzy relationship matrix with hungarian method an assignment problem with multiobject is proposed in this paper.

运用模糊数学的思想，首先将各目标下的属性值矩阵转化为模糊关系矩阵，再将模糊关系合成矩阵与解决传统指派问题的匈牙利法相结合，提出一种求解多目标指派问题的综合方法：模糊匈牙利法，并结合优化潜艇兵力配置问题进行了应用分析。

In this article, a mathematical model of enthalpy of formation for rare-earth hydride is established on the basis of the experimen...

本文应用微观结构参数法和大量的实验数据，建立了稀土贮氢合金氢化反应生成热的数学模型。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。