Effective Cyber Operation Combat Damage Evaluation Model Design through Tactical Network Integrated Opera

2017 ◽  
Vol 14 (1) ◽  
pp. 1-8
Author(s):  
Jungho Kang
Keyword(s):  
Evaluation Model ◽  
Damage Evaluation ◽  
Model Design

An Evaluation Model of Intrusion-Tolerant Topology Availability for Wireless Sensor Networks

2010 ◽  
Vol 159 ◽  
pp. 29-34
Author(s):  
Shu Ming Xiong ◽  
Xiao Qian Qu ◽  
Yong Zhao Zhan ◽  
Xin Sheng Wang ◽  
Liang Min Wang
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Evaluation Model ◽  
Wireless Sensor ◽  
Model Design ◽  
Semi Markov Process ◽  
Set Up ◽  
And Storage ◽  
Intrusion Tolerant ◽  
Storage Ability

Due to the node failures incurred by intrusion threat, a wireless sensor networks will initiate topology re-generation, which is based on correct availability evaluation of current intrusion-tolerant topology. The paper proposes an availability evaluation model based on semi-Markov process (SMP) to estimate topology availability of the intrusion-tolerant topology concerning the effects from intrusion behaviors. In view of some limitations of node computation ability and storage ability, this model reduces the complexities resulting from modeling the different intrusion threats and is set up on the uniform intruding results to simplify the model design. Using the DTMC model embedded in SMP topology availability is computed and finally we analyze the sensitivity to parameters in the model.

A Damage Evaluation Model of Turbine Blade for Gas Turbine

2016 ◽  
Author(s):  
Dengji Zhou ◽  
Meishan Chen ◽  
Huisheng Zhang ◽  
Shilie Weng
Keyword(s):  
High Temperature ◽  
Real Time ◽  
Gas Turbine ◽  
Evaluation Model ◽  
Creep Damage ◽  
Operating Conditions ◽  
Damage Analysis ◽  
Damage Evaluation ◽  
Analysis Model ◽  
Estimation Model

Current maintenance, having a great impact on the safety, reliability and economics of gas turbine, becomes the major obstacle of the application of gas turbine in energy field. An effective solution is to process Condition based Maintenance (CBM) thoroughly for gas turbine. Maintenance of high temperature blade, accounting for most of the maintenance cost and time, is the crucial section of gas turbine maintenance. The suggested life of high temperature blade by Original Equipment Manufacturer (OEM) is based on several certain operating conditions, which is used for Time based Maintenance (TBM). Thus, for the requirement of gas turbine CBM, a damage evaluation model is demanded to estimate the life consumption in real time. A physics-based model is built, consisting of thermodynamic performance simulation model, mechanical stress estimation model, thermal estimation model, creep damage analysis model and fatigue damage analysis model. Unmeasured parameters are simulated by the thermodynamic performance simulation model, as the input of the mechanical stress estimation model and the thermal estimation model. Then the stress and temperature distribution of blades will be got as the input of the creep damage analysis model and the fatigue damage analysis model. The real-time damage of blades will be evaluated based on the creep and fatigue analysis results. To validate this physics-based model, it is used to calculate the lifes of high temperature blade under several certain operating conditions. And the results are compared to the suggestion value of OEM. An application case is designed to evaluate the application effect of this model. The result shows that the relative error of this model is less than 10.4% in selected cases. And it can cut overhaul costs and increase the availability of gas turbine significantly. Therefore, the physical-based damage evaluation model proposed in this paper, is found to be a useful tool to tracing the real-time life consumption of high temperature blade, to support the implementation of CBM for gas turbine, and to guarantee the reliability of gas turbine with lowest maintenance costs.

Analyses of the Model Design of Urban Emergency Management System

2014 ◽  
Vol 989-994 ◽  
pp. 5448-5452 ◽  
Author(s):  
Xiao Ming Wang ◽  
Ying Lv
Keyword(s):  
Emergency Management ◽  
Management System ◽  
Evaluation System ◽  
Evaluation Model ◽  
Projection Pursuit ◽  
Scientific Basis ◽  
Model Design ◽  
Urban Crisis ◽  
Emergency Management System ◽  
Urban Disaster

In order to tackle the insufficiency of policies of urban crisis management and conform to the ability to deal with urban crisis, it asks to establish a comprehensive emergency management system. Under this circumstance, this paper puts forward a general framework of urban crisis, analyzing the corresponding key technologies of the system and founding a risk rating evaluation model of urban natural calamities based on the improvement of projection pursuit so as to offer scientific basis to the effective establishment and application of the evaluation system and the enhancement of the abilities to urban disaster emergency.

scholarly journals Damage Evaluation of Bridge Hanger Based on Bayesian Inference: Analytical Model

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Yang Ding ◽  
Jing-liang Dong ◽  
Tong-lin Yang ◽  
Zhong-ping Wang ◽  
Shuang-xi Zhou ◽  
...  
Keyword(s):  
Bayesian Inference ◽  
Evaluation Model ◽  
Bayes Theorem ◽  
Damage Evaluation ◽  
Mcmc Method ◽  
Initial Value ◽  
Long Span ◽  
Long Span Bridge ◽  
Proposed Model ◽  
Analytical Expressions

With the increase of the long-span bridge, the damage of the long-span bridge hanger has attracted more and more attention. Nowadays, the probability statistics method based on Bayes’ theorem is widely used for evaluating the damage of bridge, that is, Bayesian inference. In this study, the damage evaluation model of bridge hanger is established based on Bayesian inference. For the damage evaluation model, the analytical expressions for calculating the weights by finite mixture (FM) method are derived. In order to solve the complex analytical expressions in damage evaluation model, the Metropolis-Hastings (MH) sampling of Markov chain Monte Carlo (MCMC) method was used. Three case studies are adopted to demonstrate the effect of the initial value and the applicability of the proposed model. The result suggests that the proposed model can evaluate the damage of the bridge hanger.

Seismic Damage Evaluation Model of Chinese Ancient Timber Buildings

2015 ◽  
Vol 18 (10) ◽  
pp. 1671-1683 ◽  
Author(s):  
J.Y. Xue ◽  
Z.J. Wu ◽  
F.L. Zhang ◽  
H.T. Zhao
Keyword(s):  
Evaluation Model ◽  
Seismic Damage ◽  
Damage Evaluation
Sign in / Sign up

Export Citation Format

Share Document