物联网感知层测试结果综合评价方法的研究

论文总字数：28537字

摘 要

本文研究了在QT Creator编译环境中自主开发的物联网感知层安全仿真平台上，如何对实验数据进行较好的曲线拟合以及多组实验数据的综合分析与评价。

本文首先对国内外物联网感知层相关的发展状况进行了简要的概述，继而对物联网感知层仿真平台进行了必要而详尽的介绍与说明。接下来是对此次课题的背景——曲线拟合的概念进行阐述与解释。第四、五章是本文的核心，根据此次课题的要求选择了两种满足条件的曲线拟合方式——贝塞尔曲线和B样条曲线，将这两种曲线拟合的方法进行了详细的阐述与对比，并在两者的优缺点的对比之中，选择了B样条曲线作为此次实验的最终拟合方案。最后，结合QT Creator编译环境的要求进行了程序的编写与测试，并最终绘制出满意的曲线拟合效果。第六章是对此次实验过程的回顾与展望，提出了设计过程中的不足之处以及如何进一步将之改进与完善。

关键词： 物联网感知层、曲线拟合、贝塞尔曲线、B样条曲线、综合评价

The research of comprehensive assessment of the test results from the Sensing Layer in the IOT

Abstract

In this thesis , the Security Simulation Platform of the Sensing Layer in the I0T independently developed on Qt Creator is researched . The function of fitting the curve and offering a comprehensive assessment are achieved on the platform.

Firstly, I introduce the developing status and trend of the Internet of Things domestically and overseas. Secondly, this paper detailly talks about the Security Simulation Platform of the Sensing Layer. This chapter is the background of the project and what we are researching based on. The next chapter talks about curve fitting. Curve fitting is the process of constructing a curve, or mathematical function, that has the best fit to a series of data points, possibly subject to constraints. Next two chapters are the core of this thesis, Bezier curve , and B-spline curve are introduced here. In comparison of both two curve above, I choose the later B-spline curve to meet the need of the project. It has more advantages including that the degree of fitting function is low and the fitting computation is convenient.

Last but not least, I wrote a program to achieve the result in accordance with the principle of B-spline curve. More things related are discussed in the sixth chapter to improve deficiencies existed in the experiment.

KEY WORDS：the Sensing Layer in the IOT , curve fitting , Bezier curve , B-spline curve , comprehensive assessment

目录

摘要............................................................................................................2

Abstract..................................................................................................... 3

第一章 绪论................................................................................................7

1.1 引言.................................................................................................... 7

1.2 物联网的相关技术.............................................................................. 7

1.3 物联网的研究现状.............................................................................. 8

1.3.1国外对物联网的研究....................................................................8

1.3.2国内对物联网的研究....................................................................9

第二章 物联网感知层安全仿真平台...........................................................10

2.1系统介绍.........................................................................................10

2.1.1系统简介...............................................................................10

2.1.2系统的体系结构....................................................................10

2.1.3系统的使用范围...................................................................15

2.1.4系统的使用步骤...................................................................16

2.2原理及说明.....................................................................................18

2.2.1 工作原理.............................................................................18

2.2.2 使用说明.............................................................................18

第三章 曲线拟合.........................................................................................19

3.1简介................................................................................................20

3.2拟合的实现过程..............................................................................20

3.2.1不规则曲线（拟合曲线）的分类.........................................20

3.2.2曲线的方程分类...................................................................21

3.2.3曲线段的光滑连接................................................................22

第四章 两种曲线..........................................................................................23

4.1 贝塞尔曲线.....................................................................................23

4.1.1 贝塞尔曲线的数学表达式..................................................24

4.1.2 二次和三次贝塞尔曲线......................................................25

4.1.3 贝塞尔曲线的特点.............................................................27

4.2 B样条曲线.......................................................................................27

4.2.1 Ｂ样条曲线的数学表达式....................................................27

4.2.2二次Ｂ样条曲线.....................................................................28

4.2.3 二次Ｂ样条曲线的性质........................................................29

4.2.4二次B 样条曲线的特点..........................................................30

4.2.5 三次Ｂ样条曲线...................................................................31

4.3贝塞尔曲线和B样条曲线的比较.........................................................31

4.3.1 贝塞尔曲线在应用中的不足................................................31

4.3.2 B样条曲线在应用中的优点..................................................31

第五章 核心算法的选取与功能的实现............................................................32

5.1 多点二次B样条曲线程序设计.............................................................32

第六章 总结与反思........................................................................................ 41

6.1 总结.................................................................................................. 41

6.2 反思.................................................................................................. 42

参考文献......................................................................................................... 43

致谢................................................................................................................. 44

剩余内容已隐藏，请支付后下载全文，论文总字数：28537字