Advanced Materials Research Vol. 459

Abstract: Image segmentation is one focus of digital image processing. In this paper, fourteen different kinds of classical image segmentation algorithms are studied and compared using corn image and simulating in MATLAB based on HSI color model. The result reveals that the method that using H component based on HSI color model to deal with the histogram threshold algorithm and Laplace edge detection algorithm is effectively extract the plant from the corn image

Abstract: Hermitian wavelet is a low-oscillation, complex valued wavelet, which can detect the singularity characteristic of a signal precisely under strong background noise condition. A new method of bearing fault diagnosis based on multi-scale Hermitian wavelet envelope spectrum is proposed. The multi scale Hermitian wavelet envelope spectrum technique combines the advantages of Hermitian wavelet transform, envelope spectrum and three dimensions color map into one integrated technique. The bearing fault vibration signal is firstly decomposed using Hermitian continuous wavelet transform. Then the real and imaginary parts are obtained. In the end, the multi scale Hermitian wavelet envelope spectrum is obtained and the characteristics of the bearing fault can be recognized according to the multi-scale Hermitian wavelet envelope spectrum. The proposed method has been proved by vibration signals obtained from rolling bearing with inner or outer race fault. The experimental results verified the effectiveness of the proposed method.

Abstract: There are some significant problems in the process of development of agricultural listed companies ,especially is the existance of non-agricultural business. The paper uses the Factor Analysis to analyse the influence on operation performance of non-agricultural business for agricultural Listed Companies in china.According to empirical analysis,the conclusion is that: business on the non-agricultural term cut down the performances of the Agricultural Listed Companies,agricultural listed companies should not carry on the expansion on aspects of non-agricultural

Abstract: The ion-exchanger Al_0.6667Ti(PO₄)₂ of spinel type was prepared by means of the solid state reaction crystallization method. The extraction/insertion reaction with this material was investigated by X-ray, saturation capacity of exchange, and Kd measurement. The experimental results have proved that the acid-treated sample has a capacity of exchange 3.9mmol·g-1 for Li⁺ in the solution, The chemical analysis showed that the Li⁺ extraction/insertion progressed mainly by ion-exchange mechanism and surface adsorption.

Abstract: The optimization of the three objectives, time, cost and quality, is the important project management content. This paper applies co-evolutionary algorithm to the optimization of the three engineering project objectives. The populations of time, cost and quality are separately designed for cooperative evolutionary operators in the paper, which are coordinated and compromised to get the coordination solution in pareto optimum. All the programming algorithms are through Matlab, and finally the feasibility and superioirty of this algorithm is proved by a engineering project

Abstract: Compound Al_1.5Fe_0.5(PO₄)₂, a inverse spinel-type metal compound, was prepared by a solid state reaction crystallization method. The Li⁺ extraction/insertion with this material were investigated by X-ray, FT-IR spectroscopy, and Kd measurement, The chemical analysis showed that the Li⁺ extraction/insertion be progressed mainly by an ion-exchange mechanism. The acid treated samples had an ion exchange capacity of 8.7mmol/g for Li⁺. It had a memorial ion-sieve property for Li⁺.

Abstract: Label extraction and matching is the basis of many form-based web applications. A vision-based element-label matching approach was proposed in this paper. First, the factors which affect label matching were deeply analyzed, and then a method of reconstructing query interface by analyzing its HTML code was proposed. Finally the element-label matching was realized through consideration of tag, text semanteme and position feature. Experiments on 278 query interfaces in 8 typical domains demonstrate the feasibility and effectiveness of our proposed approach

Abstract: New complex inorganic ion exchanger AlFe(PO₄)₂ is synthesized. Chemical composition, structure and some related properties and complex mechanism of this ion exchanger are investigated by electron microscopic, X-ray diffraction and chemical methods. The ion exchange behavior of AlFe(PO₄)₂ has been studied in detail. Results of column test indicated, that the exchange capacity obtained from tests for Li⁺ in 0.1mol /L HNO₃ solution is 5.5mmol/g.

Abstract: This paper builds a competitiveness index system for airlines, utilize the thought way of Extenics and AHP, apply matter-element model into the competitiveness of airlines and conduct evaluation and analysis on the competitiveness level of sixteen domestic and foreign airlines which are relatively good. This approach reflects the competitive rating, advantages and disadvantages of airlines’ competitiveness within the evaluation range. Through the evaluation analysis, this paper shows that the competitiveness level of China's four major airlines is in a middle place compared with the competitive level of United States, Europe and other developed countries and needs to be further enhanced through improving management and other measures

Abstract: The aim of this study is to investigate the machining characteristics of gas media used in electrical discharge machining (EDM). The process parameters were designed based on Taguchi method to manage the experimental work. The main process parameters such as machining polarity, gas pressure, peak current, pulse duration, type of gas media, and servo reference voltage were adopted to explore their effects on machining performance in terms of material removal rate (MRR) and surface roughness (SR) for SKD 61 tool steel. The experimental observed values were transferred to signal-to-noise (S/N) ratios, and then the significant machining parameters affecting obviously the machining performance were determined by analysis of variance (ANOVA). The optimal combination level of machining parameter for each machining characteristic was obtained by the S/N ratio analysis according to Taguchi methodology.