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Search Results: 1 - 10 of 111163 matches for " Juan Liu "
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Research on Modes of Cargo Ro-Ro, Drop and Pull Transport in Land-Sea Transportation Channel between Shandong and Liaoning  [PDF]
Yongsheng Liu, Yu Li, Juan Chen
Journal of Service Science and Management (JSSM) , 2015, DOI: 10.4236/jssm.2015.82025
Abstract: In order to accelerate national industrial upgrading of transportation and deepen the development of logistics industry, it is imperative to construct the land-sea transportation channel between Shandong and Liaoning provinces. Taking practical situations of the two places into account, the paper aims to investigate the application of M to N mode in the process of cargo roll on-roll off, drop and pull transport and then elaborate the site selection issue of drop and pull centers from the perspective of P-median model. Meanwhile, the paper proposes to adopt “south bridging-north rolling” concept to build a brand new transportation channel which combines the cross-sea bridge with ro-ro ferry concerning the natural conditions in Bohai Bay. Corresponding solution to each project will be put forward at last.
A Gauge Transformation between Ragnisco-Tu Hierarchy and a Related Lattice Hierarchy  [PDF]
Yuqing Liu, Chao Hu, Juan Dai
Journal of Applied Mathematics and Physics (JAMP) , 2015, DOI: 10.4236/jamp.2015.310157
Abstract: A new lattice hierarchy related to Ragnisco-Tu equation is proposed and its gauge equivalence to Ragnisco-Tu equation is proven. As an application of gauge transformation, we construct Darboux transformation (DT) of this new equation through DT of Ragnisco-Tu equation. An explicit exact solution is presented as an example.
Advances in Assessing Preoperative Liver Function with Gd-EOB-DTPA Dynamic Contrast Enhanced MRI  [PDF]
Juan Li, Bing Wan, Sibin Liu
Yangtze Medicine (YM) , 2019, DOI: 10.4236/ym.2019.31004
Abstract: Liver cancer is the common malignant tumor in China and current treatment is based on surgery. However, liver function of many liver cancer patients is impaired before surgery, so there’s a high possibility of occurrence of liver failure after the tumor resection. Therefore, it’s necessary to accurately evaluate liver function before surgery. Currently, clinical methods are mostly limited to assess the function of overall liver. But the application of hepatocyte-specific contrast agent—gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid (Gd-EOB-DTPA) makes it possible to assess the function of local liver segment accurately. This paper reviewed the progress of using Gd-EOB-DTPA dynamic contrast enhanced magnetic resonance imaging (MRI) to assess liver function preoperatively, such as parameters selection for liver function assessment, clinical factors affecting Gd-EOB-DTPA enhanced MRI and so on.
Searching maximum quasi-bicliques from protein-protein interaction network  [PDF]
Hong-Biao Liu, Juan Liu, Lian Wang
Journal of Biomedical Science and Engineering (JBiSE) , 2008, DOI: 10.4236/jbise.2008.13034
Abstract: Searching the maximum bicliques or bipartite subgraphs in a graph is a tough question. We proposed a new and efficient method, Searching Quasi-Bicliques (SQB) algorithm, to detect maximum quasi-bicliques from protein-protein interaction network. As a Divide-and-Conquer method, SQB consists of three steps: first, it divides the protein-protein interaction network into a number of Distance-2-Subgraphs; second, by combining top-down and branch-and-bound methods, SQB seeks quasi-bicliques from every Distance-2-Subgraph; third, all the redundant results are removed. We successfully applied our method on the Saccharomyces cerevisiae dataset and obtained 2754 distinct quasi-bicliques.
Matrix Bounds for the Solution of the Continuous Algebraic Riccati Equation
Juan Zhang,Jianzhou Liu
Mathematical Problems in Engineering , 2010, DOI: 10.1155/2010/819064
Abstract: We propose new upper and lower matrix bounds for the solution of the continuous algebraic Riccati equation (CARE). In certain cases, these lower bounds improve and extend the previous results. Finally, we give a corresponding numerical example to illustrate the effectiveness of our results. 1. Introduction In many areas of optimal control, filter design, and stability analysis, the continuous algebraic Riccati equation plays an important role (see [1–5]). For example, consider the following linear system (see [5]): where , , is the initial state. The state feedback control and the performance index of the system (1.1), respectively, are where is the symmetric positive semidefinite solution of the continuous algebraic Riccati equation (CARE) with and are symmetric positive semidefinite matrices. Assume that the pair is stabilizable. Then the above CARE has a unique symmetric positive semidefinite stabilizing solution if the pair is observable (detectable). Besides, from [1, 6], we know that in the optimal regulator problem, the optimal cost can be written as where is the initial state of the system (1.1) and is the symmetric positive semidefinite solution of CARE (1.3). An interpretation of is that is the average value of the cost as varies over the surface of a unit sphere. Considering these applications, deriving the solution of the CARE has become a heated topic in the recent years. However, as we all know, for one thing, the analytical solution of this equation is often computational difficult and time-consuming as the dimensions of the system matrices increase, and we can only solve some special Riccati matrix equations and design corresponding algorithms (see [7, 8]). For another, in practice, the solution bounds can also be used as approximations of the exact solution or initial guesses in the numerical algorithms for the exact solution (Barnett and Storey 1970 [9]; Patel and Toda 1984 [10]; Mori and Derese 1984 [11]; Kwon et al. 1996 [12]). Therefore, during the past two and three decades, many scholars payed attention to estimate the bounds for the solution of the continuous algebraic Riccati equation (Kwon and Pearson 1977 [13]; Patel and Toda 1978 [14]; Yasuda and Hirai 1979 [15]; Karanam 1983 [16]; Kwon et al. 1985 [17]; Wang et al. 1986 [6]; Saniuk and Rhodes 1987 [18]; Kwon et al. 1996 [12]; Lee, 1997 [19]; Choi and Kuc, 2002 [20]; Chen and Lee, 2009 [21]). The previous results during 1974-1994 have been summarized in Kwon et al. 1996 [12]. In this paper, we propose new upper and lower matrix bounds for the solution of the continuous
Partial Extinction, Permanence, and Global Attractivity in Nonautonomous n-Species Gilpin-Ayala Competitive Systems with Impulses
Juan Hou,Hanhui Liu
Discrete Dynamics in Nature and Society , 2012, DOI: 10.1155/2012/150841
Abstract: The qualitative properties of general nonautonomous n-species Gilpin-Ayala competitive systems with impulsive effects are studied. Some new criteria on the permanence, extinction, and global attractivity of partial species are established by using the methods of inequalities estimate and Liapunov functions.
Structural characterization of monoacetylpentanitrohexaazaisowurt zitane (MPIW)
Xinqi Zhao,Juan Liu
Chinese Science Bulletin , 1997, DOI: 10.1007/BF02882634
Abstract:
New Trace Bounds for the Product of Two Matrices and Their Applications in the Algebraic Riccati Equation
Liu Jianzhou,Zhang Juan
Journal of Inequalities and Applications , 2009,
Abstract: By using singular value decomposition and majorization inequalities, we propose new inequalities for the trace of the product of two arbitrary real square matrices. These bounds improve and extend the recent results. Further, we give their application in the algebraic Riccati equation. Finally, numerical examples have illustrated that our results are effective and superior.
New Trace Bounds for the Product of Two Matrices and Their Applications in the Algebraic Riccati Equation
Jianzhou Liu,Juan Zhang
Journal of Inequalities and Applications , 2009, DOI: 10.1155/2009/620758
Abstract: By using singular value decomposition and majorization inequalities, we propose new inequalities for the trace of the product of two arbitrary real square matrices. These bounds improve and extend the recent results. Further, we give their application in the algebraic Riccati equation. Finally, numerical examples have illustrated that our results are effective and superior.
Error Control in Distributed Node Self-Localization
Juan Liu,Ying Zhang
EURASIP Journal on Advances in Signal Processing , 2008, DOI: 10.1155/2008/162587
Abstract: Location information of nodes in an ad hoc sensor network is essential to many tasks such as routing, cooperative sensing, and service delivery. Distributed node self-localization is lightweight and requires little communication overhead, but often suffers from the adverse effects of error propagation. Unlike other localization papers which focus on designing elaborate localization algorithms, this paper takes a different perspective, focusing on the error propagation problem, addressing questions such as where localization error comes from and how it propagates from node to node. To prevent error from propagating and accumulating, we develop an error-control mechanism based on characterization of node uncertainties and discrimination between neighboring nodes. The error-control mechanism uses only local knowledge and is fully decentralized. Simulation results have shown that the active selection strategy significantly mitigates the effect of error propagation for both range and directional sensors. It greatly improves localization accuracy and robustness.
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