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Search Results: 1 - 10 of 75604 matches for " SU Yu "
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Are Participants in Bond Market Concerned about the Quality of Information Disclosure: Evidence from Chinese Listed Companies  [PDF]
Huan Luo, Changhai Yu, Ran Su
Modern Economy (ME) , 2014, DOI: 10.4236/me.2014.511095
Abstract: High quality of information disclosure can reduce the information asymmetry, which is very important to the effective operation of the capital market. This article studies whether participants in bond market are concerned about the quality of information disclosure based on a sample of listed companies in China’s bond market from 2007 to 2013. We find that there is no significant relationship between information disclosure quality and credit rating, indicating the credit rating agencies are not concerned about information disclosure quality. However, we find information disclosure quality can significantly reduce the bond financing cost, which indicates that bond investors are concerned about information disclosure quality.
Application of Kernel Density Estimation in Lamb Wave-Based Damage Detection
Long Yu,Zhongqing Su
Mathematical Problems in Engineering , 2012, DOI: 10.1155/2012/406521
Abstract: The present work concerns the estimation of the probability density function (p.d.f.) of measured data in the Lamb wave-based damage detection. Although there was a number of research work which focused on the consensus algorithm of combining all the results of individual sensors, the p.d.f. of measured data, which was the fundamental part of the probability-based method, was still given by experience in existing work. Based on the analysis about the noise-induced errors in measured data, it was learned that the type of distribution was related with the level of noise. In the case of weak noise, the p.d.f. of measured data could be considered as the normal distribution. The empirical methods could give satisfied estimating results. However, in the case of strong noise, the p.d.f. was complex and did not belong to any type of common distribution function. Nonparametric methods, therefore, were needed. As the most popular nonparametric method, kernel density estimation was introduced. In order to demonstrate the performance of the kernel density estimation methods, a numerical model was built to generate the signals of Lamb waves. Three levels of white Gaussian noise were intentionally added into the simulated signals. The estimation results showed that the nonparametric methods outperformed the empirical methods in terms of accuracy.
Risk Analysis and Assessment of Private Equity
Su-li YU
Cross-Cultural Communication , 2008, DOI: 10.3968/738
Abstract: As a main direct investment instrument around the world, Private Equity (PE) is an effective method of deepening financial reform and innovation. But it is still in its initial stage in China, This text analyzes and identifies PE's risk from such dimensions as risk caused by external environment, risk from investors and invested enterprises. Analytic hierarchy process is used to qualitatively and quantitatively assess the risks, in hopes of providing the basis for risk management and control of PE. Key words: Private Equity; Risk; Analysis; Assessment Résumé: L’investissement du capital privé est un outil principal et direct qu’on utilise dans le monde entier. C’est également un moyen efficace pour approfondir les réformes financières et les innovations. Mais dans notre pays, il vient de commencer. Dans cet article, l’auteur fait des analyses et des identifications sur les risques posés par l'environnement extérieur, les risques des investisseurs, ainsi que les risques venants des entreprises investies. En utilisant les AHP, l’auteur évalue les risques quantitatifs et qualitatifs de l’investissement du captial privé, eu vue de fournir des appuis pour le management et le contr le des risques d’investissement du captial privé. Mots-clés : investissement du captial privé; risques; analyses; évaluations 摘要:私募股權投資作為國際主流的直接投資工具,是深化金融改革與創新的有效路徑,但在我國還處於剛剛起 步的階段。本文從外部環境引起的風險、來自投資者的風險、以及來自被投資企業的風險等方面對私募股權投資 的風險進行了分析與識別,並用層次分析法對私募股權投資風險進行了定性與定量相結合的評估,以期對私募股 權投資風險管理與控制提供依據。 關鍵詞:私募股權投資; 風險; 分析; 評估
Competing in the Global Solar Photovoltaic Industry: The Case of Taiwan
Yu-Shan Su
International Journal of Photoenergy , 2013, DOI: 10.1155/2013/794367
Teach to live or live to teach: A case study on the educational beliefs of displaced teachers in Taiwan
Su, Yu-Nan
International Journal of Research Studies in Education , 2012,
Abstract: Current changes in the Taiwan’s Teacher Education Law has brought forth new and diverse outlook on Taiwan’s teacher education. The law aims at breaking the traditional conservative approach on teacher education; a provision which allow students of non-education degree (as oppose to graduates of normal colleges) to pursue teaching credentials, hence providing a more diverse choice in teacher selection. However, the over expansion of schools who provide such kind of teaching credentials, has resulted in the over saturation of the market with surplus workforce, thus leading to extreme competition of the job market and the appearance of the concept of teachers without regular jobs, vagabond teachers, or just simply displaced teachers. This phenomenon is being herald as the resulting problem of the Taiwan’s Teacher Education Law, however, few studies has been conducted on such relevant issues. Therefore, in order to further understand the issue, this case study shall focus on the so-called displaced teachers’ educational beliefs and the factors that may affect the teachers’ choice of career. Individual semi-structured interviews were conducted on twelve (12) displaced teachers, to understand the impact of educational beliefs on their attitude in facing the intense career competition. Result shows that there is a direct correlation between the teachers’ current career choice and their initial educational beliefs. Findings shall serve as a point of reference for contemporary visions on future teacher education policy.
Formal Specification and Impementation of RBAC Model with SOD
Su Yu,Jon Brewster
Journal of Software , 2012, DOI: 10.4304/jsw.7.4.870-877
Abstract: RBAC(Role-Based Access Control) is an efficient and safe role_based access control mechanism. Separation Of Duty (SOD) is one of the most expected characteristics of RBAC system and also is one of the main characteristics of secure system. This paper presents SOD’s attributes of RBAC model by formal specification and their relations by state graph. This paper also explains a program for implementing SOD constraint in MIS by relationship between tables.
Actuality and Problems of the Financial Support of Agricultural Industrialization in Jilin Province
Su Zhang,Yu Gu
Journal of Agricultural Science , 2010, DOI: 10.5539/jas.v2n4p135
Abstract: Jilin Province is one of the biggest agricultural bases in China, and the development road of agricultural industrialization is the necessary approach for Jilin to Construct the new socialism village and realize the agricultural modernization. At present, the agricultural industrialization level of Jilin is lower, and the development speed is slow, and the main cause is that Jilin lacks in a perfect agricultural industrialization financial support system, which makes the financing in the rural finance market become very difficult, and the resource allocation efficiency of agricultural industrialization become very lower.
Note on Schmidt Decomposition in Infinite Dimensional Hilbert Spaces
Su Hu,Zongwen Yu
Physics , 2007,
Abstract: This paper has been withdrawn by the author.
The Necessary and Sufficient Conditions of Separability for Bipartite Pure States in Infinite Dimensional Hilbert Spaces
Su Hu,Zongwen Yu
Physics , 2007,
Abstract: In this paper, we present the necessary and sufficient conditions of separability for bipartite pure states in infinite dimensional Hilbert spaces. Let $M$ be the matrix of the amplitudes of $\ket\psi$, we prove $M$ is a compact operator. We also prove $\ket\psi$ is separable if and only if $M$ is a bounded linear operator with rank 1, that is the image of $M$ is a one dimensional Hilbert space. So we have related the separability for bipartite pure states in infinite dimensional Hilbert spaces to an important class of bounded linear operators in Functional analysis which has many interesting properties.
Separability Criterion for Multipartite Pure States
Zongwen Yu,Su Hu
Physics , 2007,
Abstract: In this paper, we give out some effective criterions which can be used to judge the separability of multipartite pure states. We obtain the relationship between separability and Schmidt decomposable of multipartite pure states in Theorem1. The first criterion derived from Theorem2 dose not need the Schmidt decomposition which is hard to find for multipartite states. Theorem3 is more profound which can be used to deduce Corollary1 which is one of the main results in [1]. Finally, we give out an algorithm which can be used to judge the separability of multipartite pure states effectively.
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