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Search Results: 1 - 10 of 149460 matches for " Li Ma "
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Liouville Type Theorems for Lichnerowicz Equations and Ginzburg-Landau Equation: Survey  [PDF]
Li Ma
Advances in Pure Mathematics (APM) , 2011, DOI: 10.4236/apm.2011.13022
Abstract: In this survey paper, we firstly review some existence aspects of Lichnerowicz equation and Ginzburg-Landau equations. We then discuss the uniform bounds for both equations in Rn. In the last part of this report, we consider the Liouville type theorems for Lichnerowicz equation and Ginzburg-Landau equations in Rn via two approaches from the use of maximum principle and the monotonicity formula
Epistemological Reasons for Lack of Science in Ancient China  [PDF]
Li Ma
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.39023
Abstract: The purpose of this study was to identify the epistemological reasons for lack of science in ancient China. The study reveals a striking contrast between China and the West in terms of epistemologies concerning scientific development. In the beginning, the term “science” is defined through some illustrations which can help illuminate its essential features. Then, the study distinguishes the differences between Chinese and Western epistemologies about scientific development. The differences lie mainly in four aspects—distinct patterns of research methodology, reasoning and truth-seeking, and dissimilar understanding of the relationship between man and nature. Through discussion on each aspect, the elements which scientific development requires while Chinese were lacking in are diagnosed. A lot of typical examples, including ancient Greek and Chinese philosophies, modern Western scientists, and “subject-object dichotomy” vs. “man being an integral part of nature” offer convincing data for the study.
Retrieval of the ground surface reflectance along coast zone and island with MODIS image  [PDF]
Jinji Ma, Xiaofan Li
Natural Science (NS) , 2011, DOI: 10.4236/ns.2011.33025
Abstract: A new method based on lookup tables (LUTs) for retrieval of the ground surface reflectance along coastal zones and islands with MODIS (Moderate-resolution imaging spectroradiometer) image was descibed.Through simulation of the AHMAD radiative transfer model, we can retrieve the aerosol optical character with water pixels of MODIS image. Postulating the background is cloudless and the atmosphere on the water is the same as that on the island, we can use the 6S radiative transfer model to compute the LUT about the ground surface reflectance, then use the interpolate method to get the reflectance of the ground surface along coastal zones and islands through the reflectance of the land pixels of MODIS image, the geometric condition and the aerosol optical thickness. The LUT method is applied to determine the ground surface reflectance in Xiamen’s zone from the MODIS image. At last, the results were analyzed and its expectation errors were reported.
Visualizing Investment Decision on Decision Balls  [PDF]
Li-Ching Ma
American Journal of Operations Research (AJOR) , 2011, DOI: 10.4236/ajor.2011.12009
Abstract: Decision makers’ choices are often influenced by visual background information. This study uses open-ended equity funds in Taiwan to investigate three well-known optimal portfolio models, including the mean-variance, maximin, and minimization of mean absolute deviation. The optimal portfolios are then visualized on Decision Balls to assist investors in making investment decisions. By observing the Decision Balls, investors can see the optimal portfolios, compare the optimal weights provided by the different models, view the cluster of funds, and even find substitute funds if preferred funds are not available.
An Approach to Dynamic Asymptotic Estimation for Hurst Index of Network Traffic  [PDF]
Xiaoyan MA, Hongguang LI
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2010, DOI: 10.4236/ijcns.2010.32023
Abstract: As an important parameter to describe the sudden nature of network traffic, Hurst index typically conducts behaviors of both self-similarity and long-range dependence. With the evolution of network traffic over time, more and more data are generated. Hurst index estimation value changes with it, which is strictly consistent with the asymptotic property of long-range dependence. This paper presents an approach towards dynamic asymptotic estimation for Hurst index. Based on the calculations in terms of the incremental part of time series, the algorithm enjoys a considerable reduction in computational complexity. Moreover, the local sudden nature of network traffic can be readily captured by a series of real-time Hurst index estimation values dynamically. The effectiveness and tractability of the proposed approach are demonstrated through the traffic data from OPNET simulations as well as real network, respectively.
Contour Extraction of Skin Tumors Using Visual Attention and GVF-Snake Model  [PDF]
Li Ma, Tianzhen Su
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.510B099
Abstract:

Contour extraction of skin tumors accurately is an important task for further feature generation of their borders and sur-faces to early diagnose melanomas. An integrated approach, combining visual attention model and GVF-snake, is pro-posed in the paper to provide a general framework for locating tumor boundaries in case of noise and boundaries with large concavity. For any skin image, the visual attention model is implemented to locate the Region of Interests (ROIs) based on saliency maps. Then an algorithm called GVF-snake is utilized to iteratively drive an initial contour, deriving from the extracted ROIs, towards real boundary of skin tumors by minimizing an energy function. It is shown from ex-periments that the proposed approach exceeds in two aspects compared with other contour-deforming methods: 1) ini-tial contours generated from saliency maps are definitely located at neighboring regions of real boundaries of skin tu-mors to speed up converges of contour deformation and achieve higher accuracy; 2) the method is not sensitive to nois-es on skins and initial contours extracted.

The Role of Electronic Human Resource Management in Contemporary Human Resource Management  [PDF]
Li Ma, Maolin Ye
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.34009
Abstract: More and more organizations have been replacing face-to-face human resource management activities with electronic human resource management, E-HRM for short. E-HRM facilitates the HR function to create dynamic and operational capabilities and contributes greatly on HRM effectiveness. This article elaborates on E-HRM in detail on the following aspects: Introduction of E-HRM, types of E-HRM, role of E-HRM, factors influencing utility, effectiveness of E-HRM, determinants of attitude towards E-HRM and the context for E-HRM in China, and it is expected to help people understand E-HRM more comprehensively and systematically.
Markov-Dependent Risk Model with Multi-Layer Dividend Strategy and Investment Interest under Absolute Ruin  [PDF]
Bangling Li, Shixia Ma
Journal of Mathematical Finance (JMF) , 2016, DOI: 10.4236/jmf.2016.62022
Abstract: In this paper, we consider the Markov-dependent risk model with multi-layer dividend strategy and investment interest under absolute ruin, in which the claim occurrence and the claim amount are regulated by an external discrete time Markov chain. We derive systems of integro-differential equations satisfied by the moment-generating function, the nth moment of the discounted dividend payments prior to absolute ruin and the Gerber-Shiu function. Finally, the matrix form of systems of integro-differential equations satisfied by the Gerber-Shiu function is presented.
The Matching Equivalence Graphs with the Maximum Matching Root Less than or Equal to 2  [PDF]
Haicheng Ma, Yinkui Li
Applied Mathematics (AM) , 2016, DOI: 10.4236/am.2016.79082
Abstract: In the paper, we give a necessary and sufficient condition of matching equivalence of two graphs with the maximum matching root less than or equal to 2.
Two Depth Fusion, from “Manufacture” to “Intellectual Creation” —Based on Qingdao Hong Ling Group Innovative MTM Mode  [PDF]
Yu Ma, Chenggang Li
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.63024
Abstract:
Promoting the deep integration of informationization and industrialization is an inevitable choice for the transformation and upgrading of traditional industries. Based on information technology and based on smart manufacturing, Hong Ling Group actively develops MTM business targeting high-end consumer groups, achieves deep integration of the two industries, and en-hances the company’s core competitiveness and brand influence. This article combines the current trend of deep integration, using case studies, analyzing the MTM business model of the Hong Ling Group, and exploring its innovations in business models, technologies, production, and operations, and bringing new opportunities to the Chinese textile and apparel industry and other industries. Industrial roads, promote the integration of the two deep integration, refine the theoretical value and reference significance.
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