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Development of nonlinear cross-anisotropic model for sands based on state parameterCHEN Cheng(陈成), ZHOU Zheng-ming(周正明)(State Key Laboratory of Geomechanics and Geotechnical Engineering (Institute... on the combined effect of void ratio and stress. To predict this complex behavior of sands, a hypo-elastic model is developed based on the cross-anisotropic elasticity model, which involves four parameters......
Effective model based fault detection scheme for rudder servo systemXU Qiao-ning(徐巧宁)1, ZHOU Hua(周华)1, YU Feng(喻峰)2, WEI Xing-qiao(魏兴乔)2, YANG Hua-yong(杨华勇)1(1. State Key Laboratory of Fluid Power... and difficult task. Quite often, models are too inaccurate, especially in transient stages. In model based fault detection, these inaccuracies might cause wrong actions. An effective approach, which......
the problem of tide lane management, the upper level model is built up based on nonlinear 0-1 integer programming. A heuristic iterative optimization algorithm (HIOA) is set up to solve the tri-level..., and the integer constraints of decision variables [20]. The TLM optimization model (23), which is an ideal model, belongs to nonlinear integer programming problem. Hence, it is difficult to be solved......
usually embodies accelerated creep properties at high stress level. With the damaging variable and the hardening function introduced, a nonlinear creep model of soft rocks is established, in which the decay creep is described by the nonlinear hardening function H of viscidity coefficient. The model can describe the accelerated creep of soft rocks since the nonlinear damaging evolvement variable D......
was not analyzed. The aim of this work is to present a novel nonlinear controller for the electrode regulator system based on the approximate model approach and normalized radial basis function neural networks...) is derivable. For the nonlinear autoregressive moving average (NARMA) model Eq. (11), a Taylor expansion of the plant gives (12) where (m=a, b, c) In the actual EAF system, the output Im(k+1......
J. Cent. South Univ. (2016) 23: 449-460 DOI: 10.1007/s11771-016-3090-4 hybrid reliability model for fatigue reliability analysis of steel bridges CAO Shan-shan(曹珊珊), LEI Jun-qing(雷俊卿) School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China Central South University Press and Springer-Verlag Berlin Heidelberg 2016 Abstract: A kind of hybrid reliability model is presented......
]. The rigid-viscoplastic constitutive model developed by PERZYNA[9] is a relatively comprehensive model, which not only reflects the plastic properties of material but also includes the nonlinear...J. Cent. South Univ. Technol. (2008) 15(s1): 043-046 DOI: 10.1007/s11771-008-311-5 Constitutive model depending upon temperature and strain rate of carbon constructional quality steels YANG Liu......
: (3) SVM with linear kernel can regress the unknown linear and weakly nonlinear system well. Using SVM regression technique, the model with linear kernel... constraint sets can provide a convenient way to achieve parallel SVMs based MPC closed-loop system with larger stable margin.References [1] MIAO Qi, WANG Shi-fu. Nonlinear model predictive control based......
: tunnel water inrush; risk assessment model; attribute mathematical theory; nonlinear measurement function; similar weight method Cite this article as: YANG Xiao-li, ZHANG Sheng. Risk assessment model..., which proves once again that that the risk assessment model of tunnel water inrush based on improved attribute mathematical theory is of rationality and applicability. 6 Conclusions 1) Nonlinear......
conditions 3 Nonlinear creep model of granite residual soil 3.1 Strain components According to the test results (Table 3) under varied loading–unloading conditions, it shows that the granite residual soil... plastic strain, as shown in Figure 8(b). This stage can be described by the viscoplastic element Bingham element. 3.2 Nonlinear creep model According to the above analysis, the creep characteristics......