scholarly journals A new ranking algorithm and an evolutionary model based on comprehensive weighted clique degree for complex network

2017 ◽  
Vol 47 ◽  
pp. 756-764 ◽  
Author(s):  
Jie Xu ◽  
Zhen Liu ◽  
Jun Xu
Keyword(s):  
Complex Network ◽  
Evolutionary Model ◽  
Ranking Algorithm ◽  
Model Based

A STUDY OF IMMUNITY BASED ON PENNA AGING MODEL

2006 ◽  
Vol 17 (04) ◽  
pp. 479-492
Author(s):  
MINGFENG HE ◽  
SHUANG WANG
Keyword(s):  
Immune System ◽  
Evolutionary Model ◽  
Shape Space ◽  
Aging Model ◽  
Space Model ◽  
Model Based ◽  
Penna Model

This paper describes an evolutionary model based on sexual Penna model and shape space model with infection and immunity. Each individual is represented by Penna model with an immune system. In order to study how the infection and immunity influence the survival process, we modify the Verhulst factor. Then, we present the results of our simulations, and discuss the evolution of population and the effect of immunity respectively. In addition, we study the effect of the memory of the immune system and the effect of vaccination under different conditions.

scholarly journals SARS-CoV-2 Spike Affinity and Dynamics Exclude the Strict Requirement of an Intermediate Host

2021 ◽  
Author(s):  
Matteo Castelli ◽  
Luigi Scietti ◽  
Nicola Clementi ◽  
Mattia Cavallaro ◽  
Silvia Faravelli ◽  
...  
Keyword(s):  
Intermediate Host ◽  
Receptor Binding ◽  
Animal Species ◽  
Evolutionary Process ◽  
Evolutionary Model ◽  
Model Based ◽  
Rhinolophus Affinis ◽  
Strict Requirement ◽  
Spike Dynamics

SARS-CoV-2 proximal origin is still unclear, limiting the possibility of foreseeing other spillover events with pandemic potential. Here we propose an evolutionary model based on the thorough dissection of SARS-CoV-2 and RaTG13 - the closest bat ancestor - spike dynamics, kinetics and binding to ACE2. Our results indicate that both spikes share nearly identical, high affinities for Rhinolophus affinis bat and human ACE2, pointing out to negligible species barriers directly related to receptor binding. Also, SARS-CoV-2 spike shows a higher degree of dynamics and kinetics optimization that favors ACE2 engagement. Therefore, we devise an affinity-independent evolutionary process that likely took place in R. affinis bats and limits the eventual involvement of other animal species in initiating the pandemic to the role of vector.

An Enhanced Fuzzy Information Retrieval Model Based on Linguistics

2014 ◽  
Vol 519-520 ◽  
pp. 853-856
Author(s):  
Zeinab E. Al-Arab ◽  
Ahmed M. Gadallah ◽  
Hesham M. Hefny
Keyword(s):  
Information Retrieval ◽  
Ranking Algorithm ◽  
Retrieval Model ◽  
Fuzzy Information ◽  
Model Based ◽  
Fuzzy Ontology ◽  
Confidence Degree ◽  
Subjective View ◽  
Fuzzy Information Retrieval

The paper proposes a linguistic based fuzzy ontology information retrieval model. The model deals with linguistic based queries in multi domains. Such linguistics are user defined, reflecting his subjective view. The model also proposes a ranking algorithm that ranks the set of relevant documents according to some criteria such as their relevance degree, confidence degree, and updating degree.

AN EVOLUTIONARY MODEL BASED ON BIT-STRING WITH INTELLIGENCE

2005 ◽  
Vol 16 (08) ◽  
pp. 1303-1309 ◽  
Author(s):  
MINGFENG HE ◽  
QIUHUI PAN ◽  
BINGLIN YU
Keyword(s):  
Population Size ◽  
Evolutionary Model ◽  
Model Based ◽  
Penna Model ◽  
Effect Of Food ◽  
Set Up

An evolutionary model based on bit-strings with intelligence is set up in this paper. In this model, gene is divided into two parts which relative to health and intelligence. The accumulated intelligence influences the survival process by the effect of food and space restrictions. We modify the Verhulst factor to study this effect. Both asexual and sexual model are discussed in this paper. The results show that after many time steps, stability is reached and the population self-organizes, just like the standard Penna model. The intelligence made the equilibrium to be reached larger both in asexual model and sexual model. Compared with asexual model the population size fluctuates more strongly in the sexual model.

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