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 In this paper, the properties of the fibrogram are investigated theoretically. The theoretical formula for fibrogram is given as: R(η_0)=integral from n=η_0 to w (ηη_0)/ηf(η)dη and the frequency function for the variate η_0 is φ(η_0)=integral from n=η_0 to w 1/ηf(η)dη The properties of the unfinished part of R(η_0) curve are also investigated, and the approximate relation to which is given as R(η_0)=α+βη_0+γη_0~2 (0≤η_0≤1″/4) which is required for the extrapolation to that unfinish part having η_0 less one... In this paper, the properties of the fibrogram are investigated theoretically. The theoretical formula for fibrogram is given as: R(η_0)=integral from n=η_0 to w (ηη_0)/ηf(η)dη and the frequency function for the variate η_0 is φ(η_0)=integral from n=η_0 to w 1/ηf(η)dη The properties of the unfinished part of R(η_0) curve are also investigated, and the approximate relation to which is given as R(η_0)=α+βη_0+γη_0~2 (0≤η_0≤1″/4) which is required for the extrapolation to that unfinish part having η_0 less one fourth of an inch, the constants α, β and γ could be obtained from given fibrogram. Another part of this paper is the discussion and the criticism on the theory of the fibrogram given by K. L. Hertel. It is pointed out that the baslc concepts in establishing his theory seems questionable and proves the necessany conditions which shouled be fulfilled for the existance of his formula. At last, some pratical causes which would influence the trace of the fibrogram are discussed.  本文从理論对照影机曲綫进行了分析与研究,从实际現象出发而导出了照影机曲线的理論方程式如下: R(η_0)=integral from η_0 to w (ηη_0)/ηf(η)dη以及η_0的頻率函数为φ(η_0)=integral from η_0 to w 1/ηf(η)dη本文除了分析与討論R(η_0)曲线的具有实用价值的特性外,尚研究了1/4以下的K(η_0)曲线的近似性質,插补方法,并提出該近似曲綫方程如下: R(η_0)=α+βη_0+γη_0~2 (0<η_0≤1/4)其中α,β与γ可由已获得的R(η_0)曲线求得。此外,本文另一个主要工作是分析与批判了資产阶級的学者K.L.赫丹尔的照影机曲线的理論,指出了他的基本概念方面的錯誤的原因,并指出了他所提出的方程式所必需滿足的存在条件。最后,还提出影响R(η_0)曲线准确描绘的实际因素。  The tourist image power is playing a more and more important part in the vigor of a city or town.The tourist image issue which comes from the westem theory CIS (Corporate Identity System) has become a necessary research subject to propel tourist effects.This paper mainly qppraises in contrast the development and practice of Shuangjiang Town's tourism through leaming some advanced experience from both at home and abroad and applying DI theory (Destination Image System),which will be of great importance to the... The tourist image power is playing a more and more important part in the vigor of a city or town.The tourist image issue which comes from the westem theory CIS (Corporate Identity System) has become a necessary research subject to propel tourist effects.This paper mainly qppraises in contrast the development and practice of Shuangjiang Town's tourism through leaming some advanced experience from both at home and abroad and applying DI theory (Destination Image System),which will be of great importance to the tourist development of the famous historic and cultural town—Shuangjiang.  城镇旅游形象力在城镇活力中的地位和作用日益突出 ,源自西方企业识别系统 (CIS)的旅游地形象问题已成为推动旅游效应的必要的研究课题。本文借鉴国内外的经验 ,运用DI理论对照评述了双江旅游开发的实践 ,对2 1世纪双江文化历史名镇旅游发展具有重要意义。  For steam turbine in the plant, in order to improve the efficiency, th e gap between rotor and stator is usually designed to be very small. Numerous di sturba nces, such as unbalance forces and gap change, will lead to impact between stato r and rotor. The subsection motive equation of rubbing impact rotor model is bu i lt to explore the chaotic characteristics of rub vibration. Numerical integral r esults indicate that different forms of rub impact are taken on with the change of unbalance force and speed... For steam turbine in the plant, in order to improve the efficiency, th e gap between rotor and stator is usually designed to be very small. Numerous di sturba nces, such as unbalance forces and gap change, will lead to impact between stato r and rotor. The subsection motive equation of rubbing impact rotor model is bu i lt to explore the chaotic characteristics of rub vibration. Numerical integral r esults indicate that different forms of rub impact are taken on with the change of unbalance force and speed ratio. When speed ratio increases from 0 to 20, rub impact motion will go through an extraordinary route to chaos by multi cycle bi furcation. Moreover, multi cycle bifurcation and chaos phenomenon appear altern a tely in the whole process. Meanwhile rotor to stator rub takes on abundant frequ ency characteristics. Rubbing impact vibration of turbine shaft is also analyze d in detail based on the samples collected in the power plant. Similar character istics of f requency spectrum during development of chaos to that of numerical analysis can be obtained. The theoretic contribution to diagnose the rotor to stator rub fault in rotating machinery is concluded.  通过引入混沌理论对碰摩的非线性特征进行了理论分析及数值求解 ,研究不平衡力和转速等条件发生变化时 ,碰摩的发展历程。结果表明 ,随控制参数转速的变化 ,碰摩出现从稳定周期运动经过倍周期分叉到达混沌的特征。文中对某电厂 2 0 0 MW机组出现的碰摩故障进行了实际分析和理论对照 ,得到的一般规律和理论定性分析结果一致   << 更多相关文摘 
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