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Search Results: 1 - 10 of 5907 matches for " CHI Shuyeong "
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BOUNDARY ELEMENT ANALYSIS OF CRACK PROPAGATION PATHS IN ANISOTROPIC ROCK
基于边界元法各向异性岩石的裂纹传播路径分析

KE Chienchung,HSU Shihmeng,CHEN Chaoshi,CHI Shuyeong,
柯建仲
,许世孟,陈昭旭,冀树勇

岩石力学与工程学报 , 2010,
Abstract: The development of a unified numerical framework based on the boundary element method(BEM) for modeling crack propagation behavior in anisotropic rock is presented. The BEM formulation combined with the maximum circumferential stress criterion is used to predict the crack initiation angles and to simulate the crack propagation paths. To demonstrate the proposed BEM procedure to predict crack propagation in anisotropic rock,the propagation path in cracked straight-through Brazilian disc(CSTBD) specimen is numerically predicted and compared with the actual laboratory observations. Good agreement is found between the two approaches. It is therefore concluded that the proposed BEM procedure can accurately simulate the process of crack propagation for anisotropic rock.
Software Components Behavioral Adaptation Based on LTS  [PDF]
Chi Zhang
Journal of Computer and Communications (JCC) , 2015, DOI: 10.4236/jcc.2015.35006
Abstract:

Compatibility is the precondition to ensure the correct interaction among components in composition process, how to make the mismatch components coordinate correctly is a vital problem in component composition. This paper first modeled component behavior by LTS and expressed action mapping as synchronous vector then defined the sequential relationship among synchronous vectors as adaptation contract. Thirdly we analyzed the different mismatch situations and corresponding adaptation strategies. At last designed adaptation algorithm to produce adaptor specification automatically and ensured the mismatch components can correct interaction under the mediation of adaptor and verified the validity of proposed method through an application system.

Self-Organized Bike Redistribution in Urban City  [PDF]
Yiheng Chi
American Journal of Operations Research (AJOR) , 2018, DOI: 10.4236/ajor.2018.85022
Abstract: Bicycle is an affordable and environmental friendly alternative to private cars and public transportation. Recently, some big cities in China established the bike-sharing system (BSS) through which people can rent bikes offered by government or commercial companies. However, due to limited parking space, it is often difficult for bikers to park their bicycles in bike stations. This paper envisions approaching this problem by using a self-organized bike redistribution strategy: as time passes by, bike society will form an equilibrium state of bike redistribution.
Market Segmentation for Mobile TV Content on Public Transportation by Integrating Innovation Adoption Model and Lifestyle Theory  [PDF]
Chi-Chung Tao
Journal of Service Science and Management (JSSM) , 2008, DOI: 10.4236/jssm.2008.13026
Abstract: An integrated approach based on innovation adoption model and lifestyle theory for customer segmentation of mobile TV content on public transportation using multivariate statistical analysis is proposed. Due to high daily trips and dif-ferent train types Taiwan Railway Administration is chosen as the case study. Firstly, the content of mobile TV on the train are identified as the segmentation variable and key factor facets for mobile TV content are renamed by using fac-tor analysis. Then, the cluster analysis is used to classify customer groups which are named by analysis of variance (ANOVA) and market segmentations are described with demographic, lifestyle and train patronage variables by using cross analysis and Chi-squared independence tests. Finally, this paper discusses empirical results to provide valuable implications for better mobile TV content marketing strategies in the future.
Dynamic Response Analysis of Beams with Oblique Collision  [PDF]
Junping Pu, Yandong Chi
Engineering (ENG) , 2011, DOI: 10.4236/eng.2011.37095
Abstract: Adopting a dynamic contact numerical method, some problems such as the central collision, transverse collision and oblique collision between two beams are researched. Numerical expressions for these cases are deduced. Using a self-developed finite element program some examples are computed, and compared with the analytical solution of the central collision, this numerical algorithm is proved to be reliable. For the other numerical results that have no analytical solution to be used to compare with, they are also reasonable through the theoretical analysis. For the transverse and oblique collision, the ideal results can be obtained by using a smaller time step.
Measuring Public School Competition from Private Schools: A Gravity-Based Index  [PDF]
Kaustav Misra, Guangqing Chi
Journal of Geographic Information System (JGIS) , 2011, DOI: 10.4236/jgis.2011.34027
Abstract: This research develops a gravity-based index of public school competition from private schools within local markets. Proponents of educational reform often call for policies to increase competition between schools. A major hurdle for researchers examining this issue is to determine a workable definition of “competition” by which they can measure the degree of competition within local markets. This study addresses this challenge by developing a school competition index for public schools in the Jackson metropolitan area of Mississippi, USA that considers the enrollments in public schools and the enrollments in their neighboring private schools, as well as the distances between them. The school competition index reveals the degree of competition for each public school based on its spatial location relative to peer private schools operating within its service area. This methodology can be useful for evaluating competition in other markets and redefining the traditional market structure.
Differential Evolution Using Opposite Point for Global Numerical Optimization  [PDF]
Youyun Ao, Hongqin Chi
Journal of Intelligent Learning Systems and Applications (JILSA) , 2012, DOI: 10.4236/jilsa.2012.41001
Abstract: The Differential Evolution (DE) algorithm is arguably one of the most powerful stochastic optimization algorithms, which has been widely applied in various fields. Global numerical optimization is a very important and extremely dif-ficult task in optimization domain, and it is also a great need for many practical applications. This paper proposes an opposition-based DE algorithm for global numerical optimization, which is called GNO2DE. In GNO2DE, firstly, the opposite point method is employed to utilize the existing search space to improve the convergence speed. Secondly, two candidate DE strategies “DE/rand/1/bin” and “DE/current to best/2/bin” are randomly chosen to make the most of their respective advantages to enhance the search ability. In order to reduce the number of control parameters, this algorithm uses an adaptive crossover rate dynamically tuned during the evolutionary process. Finally, it is validated on a set of benchmark test functions for global numerical optimization. Compared with several existing algorithms, the performance of GNO2DE is superior to or not worse than that of these algorithms in terms of final accuracy, convergence speed, and robustness. In addition, we also especially compare the opposition-based DE algorithm with the DE algorithm without using the opposite point method, and the DE algorithm using “DE/rand/1/bin” or “DE/current to best/2/bin”, respectively.
Who Publishes What in the Journal of the Learning Sciences: Evidence for Possible Biases  [PDF]
Chi Kim Cheung
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.32040
Abstract: A content analysis of the Journal of the Learning Sciences (JLS) was conducted for a 5-year period. Article topics, methodology, the names of the contributing authors, their academic ranks, affiliations, and geographical locations were coded to reveal trends in publication patterns. A questionnaire was sent to all authors in the relevant period to find out how they selected journals for submitting manuscripts. It was found that the active involvement of the JLS’s editor in the journal’s orientation correlated with the great importance that the JLS’s contributors gave to editorial considerations when selecting journals. A possible geographical bias was identified, and possible solutions were discussed.
Attempt Suicide by Inserting a Ball-Pen into the Brain: A Case Report  [PDF]
Chi-Man Yip
Surgical Science (SS) , 2012, DOI: 10.4236/ss.2012.34040
Abstract: Purpose: Closed head injuries are more common than penetrating head injuries in our clinical practices. Penetrating head injuries can be happened in industrial accidents, car accidents, fall accidents or criminal activities, also they can be occurred in self-inflicted injuries. We reported a case of self-inflicted penetrating head injury to highlight the importance of suicide precaution and review the principle of management of penetrating head injury. Methods and Results: A 58 year-old woman, who has hypertension and major depression, attempted suicide by inserting a ball-pen into her brain through the right temple in the psychiatric ward. CT of brain showed a foreign body penetrating through the right sphenoid ridge to intracranial right frontal-temporal junction, right parasella and suprasella cistern to interpeduncular cistern and acute subarachnoid hemorrhage in the basal cistern and right sylvian fissure. She underwent an emergent neurosurgical procedure to remove the ball-pen, to evacuate the intracranial hematoma and to repair the lacerated dura. She recovered gradually and was clear after surgery, but a right oculomotor palsy and very mild left hemiparesis were left. Discussion: We learn a lesson from this patient, even a ball-pen can become a weapon in the hands of depression patients. All clinicians should be aware of the psychological condition of each patient and suicide precaution should be kept in mind in clinical practice.
BLU Factorization for Block Tridiagonal Matrices and Its Error Analysis  [PDF]
Chi-Ye Wu
Advances in Linear Algebra & Matrix Theory (ALAMT) , 2012, DOI: 10.4236/alamt.2012.24006
Abstract: A block representation of the BLU factorization for block tridiagonal matrices is presented. Some properties on the factors obtained in the course of the factorization are studied. Simpler expressions for errors incurred at the process of the factorization for block tridiagonal matrices are considered.
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