| 1. | The one dimension lyapunov exponent mode of boiler tube leak prediction is confirmed
确定了炉管泄漏预报的一维lyapunov指数模式。 |
| 2. | In - depth experiments are made for all kinds of the boiler tubes leak and diagnosis
对各种型号锅炉的炉管泄漏检测与诊断进行深入的实验研究。 |
| 3. | The troubles of boiler tube leak have become the key problem on the machine safe stable movement in our country
锅炉炉管泄漏事故已成为影响我国设备安全稳定运行的主要问题。 |
| 4. | In the process of oilfield production , quite a proportion of maintenance operations on mechanical production wells are due to rod breakdown or tubing leaking resulted from borehole deviation and eccentrically worn string
摘要在油田生产过程中，机采井维护性作业有相当的比例是由于井料造成管杆偏磨，导致抽油杆断脱或油管漏失。 |
| 5. | Adopting the " expand in frequency domain " theory , not the linear prediction in phase space reconstruction algorithms , the reductive computing of boiler tube leak signal is done and validated by experiments
舍弃了传统相空间重构的过程中的线性预测模式，采用“频域拓展”的方法，对炉管泄漏声信号进行了还原计算，并通过实验进行了验证。 |
| 6. | Based on the present domestic and international actualities , this paper makes in - depth experiments for the technology of boiler tube leak detection and diagnosis , and develops the system of the boiler tube leak detection and diagnosis
本文在充分研究了国内外现状的前提下，对锅炉炉管泄漏检测与诊断技术进行了深入的理论与实验研究，开发了锅炉炉管泄漏检测与诊断系统，研究的主要内容包括以下几个方面。 |
| 7. | These are the main contents : the characters in time domain and frequency domain of the background noise inside boiler are analyzed theoretically and studied by experiments , and the upper limit frequency of it is confirmed , these are very important to the diagnosis of boiler tube leak and avoid wrong alarms
对炉内背景噪声的时、频域特性进行了理论分析与实验研究，确定了炉内背景噪声的上限频率，这对炉管泄漏的诊断和防止误报警具有重要意义。 |
| 8. | It testifies that chaos is existed in the sonic signal of boiler tube leak , according to the chaos theory and the correlative contents about the sky dynamics , and illustrates the physical meanings of the lyapunov exponent ( the change at the place of the boiler tube leak ) , based on the calculational methods of the lyapunov exponent and the peculiarities of boiler tube leak detection and diagnosis
根据混沌理论与空气动力学的有关理论，确定了炉管泄漏声信号中存在着混沌，在讨论如lyapunov指数的算法的基础上，针对锅炉炉管泄漏检测与诊断的特点，明确了lyapunov指数的实际物理含义(炉管泄漏点处状态的变化) 。 |
| 9. | Based on the analysis and summarization about the hardware and the diagnosis theories of the no . 1 and no . 2 boiler tube leak monitor and diagnosis system , the design optimization is studied , and the experiments and theories about boiler tube leak detection and diagnosis are realized through the chaos and fractal theory ; the develops and designs of boiler tube leak detection and diagnosis system are finished , and acquire some good benefits
在分析、总结第一、二代炉管泄漏监测系统的硬件及线性诊断方法的基础之上，进行了炉管泄漏检测与诊断系统的优化设计，采用混沌与分形理论对锅炉炉管泄漏检测与诊断进行了理论与实验的研究；完成了炉管泄漏检测与诊断系统的设计与开发，该系统已成功地应用于实际，并取得了很好的效果。 |
| 10. | The " expanding in frequency domain " theory is put forward and validated , and the chaos theory and the fractal theory is applied to the detection and diagnosis of boiler tube leak , the separation between the useful signal and noise and some of problems existed in the present boiler tube leak detection are solved
提出了“频域拓展”的概念，并对这一方法的正确性进行了验证。将混沌与分形理论引入锅炉炉管泄漏检测与诊断中，完成了炉管泄漏声信号的信、噪分离，解决了目前炉管泄漏检测系统所存在的一些问题。 |
