Acute Inflammations Analysis by P System with Floor Membrane Structure

2013 ◽  
pp. 281-291
Author(s):  
Jie Xue ◽  
Xiyu Liu
Keyword(s):  
Membrane Structure ◽  
P System

scholarly journals Factual power loss reduction by enriched black hole algorithm

2021 ◽  
Vol 10 (2) ◽  
pp. 97
Author(s):  
Kanagasabai Lenin
Keyword(s):  
Black Hole ◽  
Membrane Structure ◽  
Membrane Computing ◽  
Reactive Power ◽  
Search Space ◽  
Test System ◽  
P System ◽  
Loss Reduction ◽  
Power Loss Reduction ◽  
Black Hole Algorithm

This paper presents enriched black hole algorithm (EBHA) for solving optimal reactive power problem. In this work black hole algorithm based on membrane computing is projected. In black hole algorithm evolution of the population is through pushing the candidates in the course of the most excellent candidate in iterations and black hole which swap with those in the search space. Membrane computing is also branded as P system and it has multisets of objects with evolution rules in the membrane structure. Membrane structure is alike ingrained tree of section that demarcate the areas, and root is labelled as skin. Chemical substances (multisets of objects) are there inside the section (membranes) of a cell and the chemical reactions (evolution rules) that take place within the cell. Proposed enriched black hole algorithm (EBHA) has been evaluated in IEEE 14,300 bus test system. Loss reduction achieved.

scholarly journals HOW TO SYNCHRONIZE THE ACTIVITY OF ALL COMPONENTS OF A P SYSTEM?

2008 ◽  
Vol 19 (05) ◽  
pp. 1183-1198 ◽  
Author(s):  
FRANCESCO BERNARDINI ◽  
MARIAN GHEORGHE ◽  
MAURICE MARGENSTERN ◽  
SERGEY VERLAN
Keyword(s):  
Cellular Automata ◽  
Membrane Structure ◽  
The Other ◽  
P System ◽  
Synchronization Problem ◽  
Firing Squad ◽  
Firing Squad Synchronization Problem ◽  
Firing Squad Synchronization

We consider the problem of synchronizing the activity of all the membranes of a P system. After pointing at the connection with a similar problem dealt with in the field of cellular automata where the problem is called the firing squad synchronization problem, FSSP for short, we provide two algorithms to solve this problem. One algorithm is non-deterministic and it works in the time 3h, where h is the height of the tree defining the membrane structure of the considered P system. The other algorithm is deterministic and it works in time 4n + 2h, where n is the number of membranes of the considered P system. Finally, we suggest various directions to continue this work.

scholarly journals Fraction Reduction in Membrane Systems

2014 ◽  
Vol 2014 ◽  
pp. 1-10
Author(s):  
Ping Guo ◽  
Hong Zhang ◽  
Haizhu Chen ◽  
Ran Liu
Keyword(s):  
Membrane Structure ◽  
Rational Numbers ◽  
P Systems ◽  
P System ◽  
Membrane Systems ◽  
Computing Model ◽  
Rational Computation

Fraction reduction is a basic computation for rational numbers. P system is a new computing model, while the current methods for fraction reductions are not available in these systems. In this paper, we propose a method of fraction reduction and discuss how to carry it out in cell-like P systems with the membrane structure and the rules with priority designed. During the application of fraction reduction rules, synchronization is guaranteed by arranging some special objects in these rules. Our work contributes to performing the rational computation in P systems since the rational operands can be given in the form of fraction.

Arithmetic Expression Evaluation in Membrane Computing with Priority

2011 ◽  
Vol 225-226 ◽  
pp. 1115-1119 ◽  
Author(s):  
Ping Guo ◽  
Sheng Jiao Liu
Keyword(s):  
Membrane Structure ◽  
Membrane Computing ◽  
Arithmetic Operation ◽  
P System ◽  
Arithmetic Expression ◽  
Computing Model ◽  
Model Based ◽  
Operation Rules ◽  
Expression Evaluation

Arithmetic operation and arithmetic expression evaluation are basic operations of a computing model. Based on the rules with priority, this paper discusses arithmetic operation and arithmetic expression evaluation in transition P system. We present the rules of arithmetic operation and the arithmetic of constructing arithmetic expression evaluation’s membrane structure based on the arithmetic operation rules. In the arithmetic operation rules, we use some specifically symbols to make rules applied in a maximally parallel manner, and also assure synchronization need during the rules application.

Improved Membrane Algorithm Under the Framework of P Systems to Solve Multimodal Multiobjective Problems

2021 ◽  
pp. 2159024
Author(s):  
Chuang liu ◽  
Wanghui Shen ◽  
Le Zhang ◽  
Hong Yang ◽  
Yingkui Du ◽  
...  
Keyword(s):  
Membrane Structure ◽  
Pareto Front ◽  
Test Problems ◽  
P System ◽  
Pareto Solution ◽  
Local Optima ◽  
Multiobjective Problems ◽  
Candidate Solution ◽  
Reaction Rule ◽  
Membrane Algorithm

Multimodal multiobjective problems (MMOPs) exist in scientific research and practical projects, and their Pareto solution sets correspond to the same Pareto front. Existing evolutionary algorithms often fall into local optima when solving such problems, which usually leads to insufficient search solutions and their uneven distribution in the Pareto front. In this work, an improved membrane algorithm is proposed for solving MMOPs, which is based on the framework of P system. More specifically, the proposed algorithm employs three elements from P system: object, reaction rule, and membrane structure. The object is implemented by real number coding and represents a candidate solution to the optimization problem to be solved. The function of the reaction rule of the proposed algorithm is similar to the evolution operation of the evolutionary algorithm. It can evolve the object to obtain a better candidate solution set. The membrane structure is the evolutionary logic of the proposed algorithm. It consists of several membranes, each of which is an independent evolutionary unit. This structure is used to maintain the diversity of objects, so that it provides multiple Pareto sets as output. The effectiveness verification study was carried out in simulation experiments. The simulation results show that compared with other experimental algorithms, the proposed algorithm has a competitive advantage in solving all 22 multimodal benchmark test problems in CEC2019.

An Improved Quantum-Inspired Evolutionary Algorithm Based on P Systems with a Dynamic Membrane Structure for Knapsack Problems

2012 ◽  
Vol 239-240 ◽  
pp. 1528-1531 ◽  
Author(s):  
Xue Bai Zhang ◽  
Ge Xiang Zhang ◽  
Ji Xiang Cheng
Keyword(s):  
Evolutionary Algorithms ◽  
Evolutionary Algorithm ◽  
Membrane Structure ◽  
Population Diversity ◽  
P Systems ◽  
Knapsack Problems ◽  
P System ◽  
Dynamic Adjustment ◽  
Dynamic Membrane ◽  
Elementary Membrane

To improve the performance of Quantum-inspired Evolutionary algorithm based on P Systems (QEPS), this paper presents an improved QEPS with a Dynamic Membrane Structure (QEPS-DMS) to solve knapsack problems. QEPS-DMS combines quantum-inspired evolutionary algorithms (QIEAs) with a P system with a dynamic membrane structure. In QEPS-DMS, a QIEA is considered as a subalgorithm to put inside each elementary membrane of a one-level membrane structure, which is dynamically adjusted in the process of evolution by applying a criterion for measuring population diversity. The dynamic adjustment includes the processes of membrane dissolution and creation. Knapsack problems are applied to test the effectiveness of QEPS-DMS. Experimental results show that QEPS-DMS outperforms QEPS and three variants of QIEAs recently reported in the literature.

Bimolecular and Monomolecular Lipid Films: Selected Area Electron Diffraction

1969 ◽  
Vol 27 ◽  
pp. 338-339
Author(s):  
Robert M. Glaeser ◽  
David W. Deamer
Keyword(s):  
Electron Diffraction ◽  
Membrane Structure ◽  
Molecular Organization ◽  
Membrane Material ◽  
X Ray Diffraction ◽  
Membrane Systems ◽  
X Ray ◽  
Selected Area Electron Diffraction ◽  
Lipid Films ◽  
Ultimate Objective

In the investigation of the molecular organization of cell membranes it is often supposed that lipid molecules are arranged in a bimolecular film. X-ray diffraction data obtained in a direction perpendicular to the plane of suitably layered membrane systems have generally been interpreted in accord with such a model of the membrane structure. The present studies were begun in order to determine whether selected area electron diffraction would provide a tool of sufficient sensitivity to permit investigation of the degree of intermolecular order within lipid films. The ultimate objective would then be to apply the method to single fragments of cell membrane material in order to obtain data complementary to the transverse data obtainable by x-ray diffraction.

Structural aspects of silicon diffusion in quaternary III-V thin-film semiconductors

1991 ◽  
Vol 49 ◽  
pp. 850-851
Author(s):  
F. A. Ponce ◽  
R. L. Thornton ◽  
G. B. Anderson
Keyword(s):  
Semiconductor Lasers ◽  
Wide Bandgap ◽  
Semiconductor Diode ◽  
Visible Range ◽  
P System ◽  
Misfit Dislocations ◽  
Lattice Match ◽  
Semiconductor Diode Laser ◽  
Thin Film Semiconductors ◽  
Silicon Diffusion

The InGaAlP quaternary system allows the production of semiconductor lasers emitting light in the visible range of the spectrum. Recent advances in the visible semiconductor diode laser art have established the viability of diode structures with emission wavelengths comparable to the He-Ne gas laser. There has been much interest in the growth of wide bandgap quaternary thin films on GaAs, a substrate most commonly used in optoelectronic applications. There is particular interest in compositions which are lattice matched to GaAs, thus avoiding misfit dislocations which can be detrimental to the lifetime of these materials. As observed in Figure 1, the (AlxGa1-x)0.5In0.5P system has a very close lattice match to GaAs and is favored for these applications.In this work, we have studied the effect of silicon diffusion in GaAs/InGaAlP structures. Silicon diffusion in III-V semiconductor alloys has been found to have an disordering effect which is associated with removal of fine structures introduced during growth. Due to the variety of species available for interdiffusion, the disordering effect of silicon can have severe consequences on the lattice match at GaAs/InGaAlP interfaces.

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