The Beijing Union University is a municipal university administered by the Beijing government of China. In order to facilitate the municipal development, BUU was established in the 1980s, incorporating vocational schools and taking over some of the satellite campuses affiliated to universities including Peking University, Tsinghua University, Renmin University, Beijing Foreign Studies University, Beijing International Studies University, etc. Wikipedia.
Huang C.-E.,Beijing Union University |
Li D.,Tsinghua University |
Xue Y.,Tsinghua University
Control Engineering Practice | Year: 2013
A new control solution based on a unique active disturbance rejection control (ADRC) paradigm is proposed for the ALSTOM gasifier control problem. In the new control method, the disturbances, including unknown dynamics and external disturbances to the system, are treated as an augmented state that is estimated and then eliminated in real-time. A first-order ADRC scheme for the ALSTOM gasifier is designed. The simulation results show that the new control method is superior to the PI solution by Simm and Xue in terms of the integral of the absolute error of gas pressure disturbance tests at 0% load, the no-overshoot peak value of the gas temperature and the short time for the bed mass to return to the set point during a ramping test, and the ability to reject large coal quality disturbances. © 2012 Elsevier Ltd.
Huang H.-C.,Beijing University of Chemical Technology |
Huang H.-C.,Beijing Union University |
Xu K.,Capital Normal University
Journal of Alzheimer's Disease | Year: 2012
The deposition of amyloid-β (Aβ) peptides in senile plaques is one of pathological hallmarks of Alzheimer's disease (AD). Mitochondrial dysfunction is an early event of cell apoptosis. Increasing evidence indicates that Aβ induces neuronal apoptosis through mitochondrial dysfunction. Curcumin, an anti-oxidative component of turmeric (Curcuma longa), has shown anti-tumor, anti-inflammatory, and anti-oxidative properties. In this study, we investigated the protective effects of curcumin against mitochondrial dysfunction induced by Aβ. Based on the assay results of mitochondrial metabolic markers, we found that curcumin protects human neuroblastoma SH-SY5Y cells against the Aβ-induced damage of mitochondrial energy metabolism. Curcumin inhibits Aβ-induced mitochondrial depolarization of membrane potential (Δψm) and suppresses mitochondrial apoptosis-related proteins including cytochrome c, caspase-3, and Bax, which are activated by Aβ. Aβ-induced disturbances of redox state are linked to mitochondrial dysfunction. Curcumin normalizes cellular antioxidant enzymes (including SOD and catalase) in both protein expression and activity and decreases oxidative stress level in Aβ-treated cells. Both total GSK-3β expression and phospho-Ser9 GSK-3β (pSer9-GSK-3β) are down-regulated in the cells pre-treated with curcumin. This study demonstrates curcumin-mediated neuroprotection against Aβ-induced mitochondrial metabolic deficiency and abnormal alteration of oxidative stress. Inhibition of GSK-3β is involved in the protection of curcumin against Aβ-induced mitochondrial dysfunction. © 2012-IOS Press and the authors. All rights reserved.
Wang Y.-P.,Beijing Union University
Research Journal of Applied Sciences, Engineering and Technology | Year: 2013
In order to conquer the premature convergence problem and lower the cost of computing of the basic Ant Colony Algorithm (ACA), we present an adaptive ant colony algorithm, named AACA, coupled with a Pareto Local Search (PLS) algorithm and apply to the Vehicle Routing Problem (VRP) and Capacitated VRP (CVRP). By using the information entropy, the algorithm adjusts the pheromone updating strategy adaptively. Experiments on various aspectsof the algorithm and computational results for some benchmark problems are reported. We compare our approach with some classic, powerful meta-heuristics and show that the proposed approach can obtain the better quality of the solutions. © Maxwell Scientific Organization, 2013.
Zhang J.,Beijing Union University
Przeglad Elektrotechniczny | Year: 2012
We study the application of a kind of non-monotone line search's technique in conjugate gradient method. At present, most of the study of conjugate gradient methods are using Wolfe's monotone line search, by constructing the condition of Zoutendijk, we can get the conclusion that it's convergence by using reduction to absurdity. Here we study the global convergence of conjugate gradient methods with Armijo-type line search, the thought of proof wasn't using the method above mentioned.
Zhuo Z.,Beijing Union University
Advanced Materials Research | Year: 2013
InVO4/TiO2 nanocomposites were synthesized via a sol-gel process, and their microstructure and morphology were characterized by XRD and FESEM. XRD analysis indicated that incorporation of InVO4 with low content (In:Ti mole ratio of 1:200) could not change the crystallinity of anatase TiO2. The photocatalytic activity of anatase TiO2 increased for more than 2 folds by incorporating small amount of InVO4 into TiO2. The MB degradation rate kapp increased from 1.147×10-2 to 1.75×10-2 min-1 while the added Cr(IV) concentration was 5mg/L. The results indicated that simultaneous removal of aqueous Cr(IV) ions and organic compounds was feasible in the photocataltyic reactions under sunlight irradiation. © (2013) Trans Tech Publications, Switzerland.
Qi C.,Beijing Union University
Procedia Engineering | Year: 2011
Particle swarm optimization (PSO) is an evolutionary metaheuristic inspired by the flocking behavior of birds, which has successfully been used to solve several kinds of problems. In this paper, we refer to capacitated vehicle routing problem (CVRP) as the object to research distribution routing optimistic problem within transportation and logistics. An improved discrete particle swarm optimization (DPSO), a variant of PSO, combined with iterated local search (ILS) method is proposed. During the search process, the improved algorithm can adaptively adjust flying time of particles with the evolutionary generations and ILS ensures that the particles escaped from the local minimum. The experimental results for partial benchmark problems showed that the better results can be obtained by the method. © 2011 Published by Elsevier Ltd.
Zhang N.,Beijing Union University
Applied Mathematics and Information Sciences | Year: 2012
In communication network, WDM optical backbone network has become the primary long-distance options. In this paper, the structure of WDM optical networks are analyzed, the add-drop system in the architecture of WDM optical networks is discussed. In order to improve network efficiency, we analyzed the characteristics of network routing, and proposed a new routing design method. In communication network, a good routing is very important for network operation. Routing technologies manage the flow of data between network segments in optical communication network. In addition, we also discussed the WDM optical network switching technology.
Sun X.,Beijing Union University
Advanced Materials Research | Year: 2013
In order to promote inventory management level, against the existing problem of spare parts management currently, the spare parts inventory management system of an enterprise engaged in casting and mechanical operations was studied. First, the simulation software Flexsim was used to model the original system. Then for the purpose of optimizing the system, ABC classification was proposed. According to the comparison of simulation results before and after optimization, optimized model can effectively improve the efficiency of inventory management. This can provide the reference of spare parts management for the other companies. © (2013) Trans Tech Publications, Switzerland.
Fang J.,Beijing Union University
Advances in Intelligent and Soft Computing | Year: 2012
This paper introduces a machine vision system for Chinese chess-playing robots which is usually regarded as a form of recreation. The machine vision system with two color cameras takes simultaneously two images of a chessboard and round pieces on the chessboard from different angles (views). Firstly, original images are handled by a series of image processing operations such as color conversion, binarization and denoise. Secondly, a hierarchical Hough transform algorithm was taken to detect lines and circles in the binarized image. Circles with reasonable radii nearly centered on the crossings of chessboard will be considered as pieces on the chessboard and its corresponding Chinese character inside the circle would be recognized based on BP neural network and ring intersection points. The 3D coordinates of pieces can be calculated through computation and then transformed to coordinates expressed by row and column. Finally, results of image processing and pattern recognition procedures will be sent to robot control system to manipulate end-effector of a robot to move round pieces from one place to another desired. Experimental results reveal that the designed machine vision system in this paper can work well with higher reliability. © 2012 Springer-Verlag GmbH Berlin Heidelberg.
Chen W.,Beijing Union University |
Guo J.-X.,Beijing Union University |
Chang P.,Beijing Union University
Molecular Nutrition and Food Research | Year: 2012
The elevated plasma cholesterol level, in particular, LDL cholesterol is regarded as an important risk factor for the development of atherosclerosis and coronary artery disease. A number of studies provide the evidence that taurine has the efficient action to reduce plasma and liver cholesterol concentrations, especially to decrease VLDL and LDL cholesterol in hypercholesterolemia animal induced by high cholesterol diet. Cholesterol lowering effect of taurine is actually involved in the regulatory mechanism of cholesterol and bile acid homeostasis that mediated by CYP7A1, which has become a biomarker for cholesterol metabolism and itself is also regulated by several factors and nuclear receptors. This review summarizes the change of cholesterol concentration in metabolism observed in feeding studies of hypercholesterolemia animal dealing with taurine, and then, addresses the possible metabolic and molecular mechanisms of cholesterol lowering effect by taurine in three aspects, cholesterol clearance from blood circulation, bioconversion of cholesterol to bile acid in liver, and excretion of cholesterol and bile acid from intestine. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.