The Logistical Engineering University of PLA or University of Logistics is an institution of higher learning located in Chongqing, focusing on military engineering. It is affiliated to the General Logistics Department of the People's Liberation Army of China, and is one of the leading military engineering academies in the country.The university was founded in 1961, and was named a national key university in 1979. Wikipedia.
Li F.,University of Sichuan |
Zhou J.,University of Sichuan |
Wu D.,PLA Logistical Engineering University
Aerospace Science and Technology | Year: 2013
This paper addresses the optimal filtering problem for a class of uncertain dynamical systems with multiple packet dropouts and finite-step correlated observation noises. By rearranging the stochastic terms in the transmission and measurement matrices of the dynamical system into the noises directly, the process noises and observation noises in resulted system depend on the state as well as the stochastic uncertain perturbations, and are not only autocorrelated respectively but also cross-correlated. For this complicated dynamical system, instead of designing a Kalman-type filter, a globally optimal filtering in the minimum mean square error sense is developed by exploiting sufficiently the statistical properties of correlated noises. Numerical simulation is provided to demonstrate the performance of the proposed filter. © 2011 Elsevier Masson SAS.
Kong L.,CAS Wuhan Institute of Rock and Soil Mechanics |
Chen Z.,PLA Logistical Engineering University
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2012
A brief introduction is provided on the overall trend of the global-wide research on special soils and slopes with a particular emphasis on the state of the practice in China on basic properties and engineering countermeasures for typical special soils such as collapsible loess, expansive soil and red clay. Recent achievements are pointed out as well as the major remaining problems in the field of special soils and slopes. The future research direction is also identified and a long list of relevant references is provided in the end of the paper.
Li H.,University of Missouri-St. Louis |
Jiang D.,PLA Logistical Engineering University
Computers and Operations Research | Year: 2012
We model the safety stock placement problem in general acyclic supply chain networks as a project scheduling problem, for which the constraint programming (CP) techniques are both effective and efficient in finding high quality solutions. We further integrate CP with a genetic algorithm (GA), which improves the CP solution quality significantly. The performance of our hybrid CPGA algorithm is evaluated on randomly generated test instances. CPGA is able to find optimal solutions to small problems in fractions of a second, and near optimal solutions of about 5% optimality gap to medium size problems in several minutes on average. © 2011 Elsevier Ltd. All rights reserved.
Zheng Y.,PLA Logistical Engineering University
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2012
Solid material develops from elastic to plastic then to failure after undertaking some load, which means that yield is different from failure. The system of yield criteria for geomaterial is discussed and two definitions which are point failure and surface failure in stress field are put forward. And the criteria of surface whole failure is defined through traditional limit analysis method. Simultaneously, the deficiencies for traditional limit analysis and numerical analysis are pointed out by reviewing and analyzing the solution characteristics of traditional limit analysis method. Based on the combination of these two methods, a newly developed numerical limit analysis method is built, which has enlarged the application rage of limit analysis. The significances and features of traditional limit analysis method and numerical limit method are studied, as well as the reliabilities. The advantages and disadvantages of numerical limit analysis are listed; and the wide applicability of numerical limit analysis in the slope(landslide) engineering, foundation engineering and tunnel engineering is illustrated.
Xiong G.,PLA Logistical Engineering University |
Xiong G.,Tsinghua University |
Ding T.-H.,Tsinghua University
Signal Processing | Year: 2013
While denoising a signal, the existing filtering methods are beset with the contradiction between signal's noise removal and feature preservation; in face of this denoising contradiction, there is no effective solution by now and they have to make a trade-off between these two contradictory aspects. With the purpose to further alleviate this contradiction progressively, but not to make a trade-off, here we established a universal denoising paradigm named as attribute distance weighted average (ADWA) from the perspective of signal's attribute analysis. ADWA not only breaks the existing methods' limitations on the number and kinds of signal's attributes, and has a flexible expandability to include any attributes, but also includes the ideas and takes the advantages of many existing filtering methods. Both theoretical analysis and experimental results show that, for any noisy signal, under the condition of a good performance of noise removal, ADWA's ability in signal's feature preservation can be progressively improved by introducing new significant attributes; this makes ADWA can obtain an enough satisfactory performance in both noise removal and feature preservation. Therefore, ADWA provides an effective and promising way to cope with the denoising contradiction. © 2012 Elsevier B.V. All rights reserved.