4,205 research outputs found

    "Can the neuro fuzzy model predict stock indexes better than its rivals?"

    Get PDF
    This paper develops a model of a trading system by using neuro fuzzy framework in order to better predict the stock index. Thirty well-known stock indexes are analyzed with the help of the model developed here. The empirical results show strong evidence of nonlinearity in the stock index by using KD technical indexes. The trading point analysis and the sensitivity analysis of trading costs show the robustness and opportunity for making further profits through using the proposed nonlinear neuro fuzzy system. The scenario analysis also shows that the proposed neuro fuzzy system performs consistently over time.

    Case Study of Internationalization Strategy of Cord Set Industry in Taiwan

    Get PDF
    The present study mainly investigated the internationalization strategy of case company in Taiwan cord set industry. The characteristics of this industry are low gross profit rate, many competitors, and high customer overlap. Thus, the companies need to have considerable economies of scale and productivity in order to competitive in the global market. Besides, the academic research about the internationalization strategy of this traditional manufacturing industry is lack. The results of present study not only can provide the proper internationalization strategy direction of case company, but also can provide reference to other companies in Taiwan cord set industry. Results showed the internationalization courses of case company are: (1) Joint venture and sole proprietorship are the main types of case company to setup overseas subsidiaries; (2) The purpose of difference areas is different: the subsidiaries of mainland China is followed customer and the Southeast Asia is expansion growth; (3) The internationalization strategy of case company is mainly followed the international leading company and pursuit of growth in current stage; (4) The strategy of cord set industry in Taiwan should be strategic alliance and diversification of products in the future

    Enhancement in electron field emission in ultrananocrystalline and microcrystalline diamond films upon 100 MeV silver ion irradiation

    Get PDF
    [[abstract]]Enhanced electron field emission (EFE) behavior was observed in ultrananocrystalline diamond (UNCD) and microcrystalline diamond (MCD) films upon irradiation with 100 MeV Ag9+-ions in a fluence of 5Ɨ1011ā€‚ions/cm2. Transmission electron microscopy indicated that while the overall crystallinity of these films remained essentially unaffected, the local microstructure of the materials was tremendously altered due to heavy ion irradiation, which implied that the melting and recrystallization process have occurred along the trajectory of the heavy ions. Such a process induced the formation of interconnected nanocluster networks, facilitating the electron conduction and enhancing the EFE properties for the materials. The enhancement in the EFE is more prominent for MCD films than that for UNCD films, reaching a low turn-on field of E0 = 3.2ā€‚V/Ī¼m and large EFE current density of Je = 3.04ā€‚mA/cm2 for 5Ɨ1011ā€‚ions/cm2 heavy ion irradiated samples.[[incitationindex]]SCI[[incitationindex]]EI[[booktype]]ē“™ęœ¬[[booktype]]電子

    Effect of gigaelectron volt Au-ion irradiation on the characteristics of ultrananocrystalline diamond films

    Get PDF
    [[abstract]]The effect of 2.245 GeV Au-ion irradiation/postannealing processes on the electron field emission (EFE) properties of ultrananocrystalline diamond (UNCD) films was investigated. Au-ion irradiation with a fluence of around 8.4Ɨ1013ā€‚ions/cm2 is required to induce a large improvement in the EFE properties of the UNCD films. Postannealing the Au-ion irradiated films at 1000ā€‰Ā°C for 1 h slightly degraded the EFE properties of the films but the resulting EFE behavior was still markedly superior to that of pristine UNCD films. Transmission electron microscopy examinations revealed that the EFE properties of the UNCD films are primarily improved by Au-ion irradiation/postannealing processes because of the formation of nanographites along the trajectory of the irradiating ions, which results in an interconnected path for electron transport. In contrast, the induction of grain growth process due to Au-ion irradiation in UNCD films is presumed to insignificantly degrade the EFE properties for the films as the aggregates are scarcely distributed and do not block the electron conducting path.[[incitationindex]]SCI[[booktype]]ē“™ęœ¬[[booktype]]電子
    • ā€¦
    corecore