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The paper includes the following parts: The first chapter is the introduction, which discusses the background of the title, research actuality, research significance, research methods and the whole research thinking and frame. The second chapter simply reviews the idea of "hard/soft ecotourists" spectrum, combining the characteristics of ecotourism market and the disadvantage situation of the Nature Reserve ecotourism, points out the necessity of the study on ecotounst behavior. The third chapter analyzes the external and internal influence factors of ecotounst behavior, which gives the matting for the after paper. The fourth chapter is the focal point of the thesis, carries on the discussion of the ecotourist behavior characteristic, and takes the Yellow River Delta Nature Reserve for example to investigate and study ecotourists.

全文具体包括以下几个方面：第一章引言，对论文的选题背景、国内外的研究状况、研究意义以及研究方法和主要思路做了简要论述；第二章简单回顾了&一般的和严格的生态旅游者&理论体系，结合生态旅游市场的特点及保护区生态旅游的困境，提出对生态旅游者行为调查研究的必要性；第三章分析了生态旅游者行为的内外部影响因素，为后文予以铺垫；第四章是论文的重点，是生态旅游者行为特征的探讨，以黄河口自然保护区为例，对生态旅游者进行调查研究。

The first part of this paper goes to a thoroughreview of studies on methods for nonlinear least squares problems, which are then,from the perspective of arithmetic design, classified into five major types: methodsbased on quasi-Newton equation, hybrid methods, factorized quasi-Newton method,trust-region methods, and self-scaling method. The second part of this paper turns thefocus toward a type of new algorithms for nonlinear least squares problems based onnew quasi-Newton equation.

本文的前半部分通过对非线性最小二乘各种求解方法的回顾，从算法设计的角度将求解方法划分为五大类：基于拟牛顿修正的方法，混合法，分解拟牛顿法，信赖域算法以及具有乘积结构类算法，本文后半部分给出了基于新拟牛顿方程的一类求解非线性最小二乘的新算法。

This paper briefly reviews the four approaches, analyzes their advantages and deficiencies. Based on that, a comprehensive on-line approach to detect rotor bar breaking fault is presented in this paper.

在回顾这些方法的同时，分析了它们的优缺点，并在此基础上，提出了一种转子断条综合在线检测方法。

Firstly, a method to estimate the rotor speed, which is based on BP neural network, is introduced in this paper. Secondly, the Park Vector approach is used to monitor and diagnose the inter-turn fault of the stator winding. Finally, this paper studies thoroughly a novel approach to detect rotor bar breaking fault, which is based on the perfect combination of the Hilbert Transform and digital filter.

具体工作如下：采用BP神经网络对异步电动机转子转速进行无速度传感器估计；对定子绕组匝间短路故障，采用派克矢量方法进行监测与诊断；对于转子断条故障，详细介绍了一种新的基于希尔伯特变换与数字滤波的在线监测方法。

By generalizing a wide range of foreign up-to-date researches on trace observation, this paper discusses its definition and origination, survey purposes, survey contents, operation methods, application especially in research field of park use, and so on. Finally, the paper displays the special operation and the developing trend of trace observation from a case study.

综合了国外规划设计专业领域关于该方法多方位的研究成果，从动线观察的概念与起源入手，对调查目的、调查内容、操作方法、实际应用等方面进行了系统深入的分析，并着重探讨了动线观察法在公园利用研究领域的应用，最后通过案例研究演示了该方法的具体应用及最新发展动向。

A comprehensive review and expectation about researching status in quo and development trends of viscous flow numerical simulation technique are given in this paper and grids generation methods, numerical computation methods, turbulent model and moving boundary simulation methods are the emphasis study in the paper. On the basic of above job a mathematical model of simulation turbulent flow with free surface is established and triumphantly applied to numerical computation on 2D spillway and 3D spillway with frusta of brake.

本文针对粘流场数值模拟技术的研究现状和发展动态作了比较全面的回顾与展望，重点研究了网格生成技术、数值求解技术、湍流模型技术和动边界模拟技术，在此基础上建立了模拟自由面湍流场的数学模型，并成功地应用到二维溢流坝和带闸墩的三维溢流坝过坝水流的数值计算。

This paper firstly reviews the evolution of American going-concern auditing opinion, so we can know the essence of this kind of auditing opinion. Secondly, on the base of analysing the conditions of going-concern of Chinese enterprises and a typical case, we draw our conclusion that chinses capital market urgently demands going-concern auditing opinion.Finally, this paper focuses on financial characteristic of company and the characteristic of going-concern auditing opinion, the market response to going-concern auditing opinion, the value relevance as well as the determinants of auditor reporting going-concern auditing opinion.

本文首先以美国为例，回顾了持续经营不确定性审计意见(going-concern opinion，以下简称为GCO)的发展沿革，籍此认识持续经营不确定性审计意见的本质内涵；其次，在对我国企业尤其是上市公司的持续经营问题进行分析的基础上，通过典型案例的剖析得出我国资本市场对持续经营不确定性审计意见存在较强烈需求的结论；最后，针对我国证券市场持续经营不确定性审计意见的市场反应、价值关联性及被出具持续经营不确定性审计意见公司的财务特征、审计师出具持续经营不确定性审计意见的影响因素进行了实证分析。

Based on the papers concerned on Bohai sea ice from Paper Databases of China Journal Net, this paper gives the state and tendency of Bohai sea ice research from.

本文基于中文期刊全文数据库中渤海海冰相关全文资源，通过系统整理、筛选、分析、归纳出了1994～2001年渤海海冰相关研究领域的发展趋势。

Gate knife hybrid folding machine for a thicker paper there are easily adaptable because thicker paper does not require too much roller, and paper texture on the hinge-it was not significant.

栅刀混合式折页机对于较厚的纸张也有很好的适用性，因为较厚的纸张不需要太多的转辊，而且纸张的纹理对折页的影响也不大。

This paper maks a further research on not only the negative effects of itself, but also its unfavorable influence on that era of China. Finally, this paper points out some referential significance of the research ...

文章还对厘金制本身存在的弊端及其给中国近代社会造成的种种危害作了较为深入的研究，并提出厘金税制研究的若干史鉴意义。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。