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This paper pertains to the study of feedback control design for the crowd evacuation in the framework of 1D and 2D models, respectively. The models representing crowd dynamics are based on the conservation law of mass with the density and velocity relationship given by a diffusion model. The feedback controllers taking care of control saturation are designed by using the method of feedback linearization...
Stochastic ranking is a promising constraint handling method for constrained evolutionary optimization problems. However, the method has some limitations when comparing two given individuals during the evolution. In order to find the optimal feasible solution, the promising infeasible individual is supposed to have an opportunity to survive if at least one of two compared individuals is infeasible...
The increasing demand for computing capability is driving the appearance of diverse parallel paradigms. Recently, MPI+OpenMP hybrid paradigm codes have been proved high performance efficiency in many applications and have been widely studied. But its relationship with MPI and OpenMP paradigm codes still need further study. In this paper, we focus on two aspects, the overhead and the number of processors...
In parallel computing, the memory requirement is an important problem, and in parallel software development, it is vital to optimize the memory management strategy. Programmers need to know the memory optimizing degree. But, the parallel programs' performance evaluation metric speedup only refers to computing time, without considering the memory cost when executing programs. In this paper, the relationship...
Directing at the complex structure, cockamamie production technology and great operation difficulty of vertical roller mill, this paper constructs the fault expert system to guide and optimize the grinding process. First, the expert database is established with fuzzy cluster analysis, principal component analysis (PCA) and tendency analysis. With support vector machine (SVM) regression, the multiple...
This Cellular Automata (CA) has been used in cryptography over the past decade for its advantages in generating pseudo-random sequence. In this paper, a novel encryption algorithm for image in our project is proposed, which is based on an improved two-dimensional CA approach. A weighted and p-interval two-dimensional CA approach forms a new evolutionary matrix including lots of optional parameters...
The existing literature mostly studies the allocation of emergency commodities in the emergency service center. This paper studies how to rationally distribute the scare emergency commodities between every factory when there aren't enough emergency commodities and related factories have to be mobilized to produce commodities after the large-scale emergency occurs. A mathematical model is established...
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