scholarly journals An efficient usage rate biclustering algorithm in real-valued function-resource dataset

2017 ◽  
Vol 11 (3) ◽  
pp. 281-291
Author(s):  
Miao Wang ◽  
Lihua Zhang ◽  
Zhiyong Xiong ◽  
Tao Yang
Keyword(s):  
System Integration ◽  
Safety Issue ◽  
Weighted Graph ◽  
Safety Analysis ◽  
Experimental Results ◽  
Resource Integration ◽  
Integration Process ◽  
Usage Rate ◽  
Two Samples ◽  
Integrated Modular Avionics

Task synthesis, function fusion, and resource integration are used to get higher performance and more reliability in integrated modular avionics system. However, safety issue is caused in the system integration process. In order to discover the potential hazards for function layer safety analysis, in this paper, we proposed an efficient biclustering algorithm— DeCluster, which can effectively mine all biclusters with maximal variant usage rate or maximal low usage rate in real-valued function-resource dataset. First, it constructs a sample weighted graph, which contains all resource relations set between two samples that satisfy the definitions; second, all maximal variant usage rate or low usage rate biclusters are mined in the graph. In order to get higher the mining efficiency of the algorithm, DeCluster algorithm uses several pruning strategies. The experimental results show our algorithm is more efficient.

Modeling Resource Availability Measurement for System Integration

2014 ◽  
Vol 494-495 ◽  
pp. 845-848 ◽  
Author(s):  
Ning She Zhao
Keyword(s):  
Resource Availability ◽  
System Integration ◽  
Degradation Process ◽  
Resource Integration ◽  
Formal Representation ◽  
Health Measurement ◽  
Object Type ◽  
Traditional Management ◽  
System Resource ◽  
Resource State

The issues about method of resources availability measurement in system integration are discussed. Firstly it analyzes the change of system resource state and discusses the mechanism of transmission of failures based on resource faults. Secondly the method of resource faults-based health measurement, and the representation of classification and formalization for resources in system integration, and the theoretical means of availability metrics of resources and resource platform are provided. The formal representation of the resource structure embodies the managing properties including resource object type, nature and state etc. And it shows the expression for degradation process of resource and events of faults production. That highlights the significance of resource integration to traditional management.

Application of TRACE and FRAPTRAN in the Spent Fuel Pool of Chinshan Nuclear Power Plant

2013 ◽  
Vol 479-480 ◽  
pp. 543-547
Author(s):  
Jong Rong Wang ◽  
Hao Tzu Lin ◽  
Wan Yun Li ◽  
Shao Wen Chen ◽  
Chun Kuan Shih
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Cooling System ◽  
Safety Issue ◽  
Water Injection ◽  
Safety Analysis ◽  
Spent Fuel ◽  
Spent Fuel Pool ◽  
Study Case

In the nuclear power plant (NPP) safety, the safety analysis of the NPP is very important work. In Fukushima NPP event, due to the earthquake and tsunami, the cooling system of the spent fuel pool failed and the safety issue of the spent fuel pool generated. In this study, the safety analysis of the Chinshan NPP spent fuel pool was performed by using TRACE and FRAPTRAN, which also assumed the cooling system of the spent fuel pool failed. There are two cases considered in this study. Case 1 is the no fire water injection in the spent fuel pool. Case 2 is the fire water injection while the water level of the spent fuel pool uncover the length of fuel rods over 1/3 full length. The analysis results of the case 1 show that the failure of cladding occurs in about 3.6 day. However, the results of case 2 indicate that the integrity of cladding is kept after the fire water injection.

scholarly journals Safety analysis for integrated modular avionics based on blueprints

2018 ◽  
Vol 169 ◽  
pp. 01029
Author(s):  
Jiayun Chu ◽  
Xiaohong Bao ◽  
Tingdi Zhao ◽  
Fuchun Ren
Keyword(s):  
Matrix Theory ◽  
Safety Analysis ◽  
System Management ◽  
Core Technology ◽  
Integrated Modular Avionics ◽  
Management Functions ◽  
New Generation ◽  
And Control ◽  
Relationship Of ◽  
The Mathematical Model

The Integrated Modular Avionics System (IMA) has been a core technology for the new generation of aircrafts in recent years. It consists of a set of reusable and interoperable common functional modules. However, the highly coupled relationship of resources makes it difficult to identify and control dangers. As an effective and efficient way, the blueprints are used to describe and manage the IMA system. Owing to the system management functions provided by the blueprints, we can accurately determine the system resources configuration status, which is very crucial for safety analysis. In this paper, we explore the possibilities to conduct safety analysis based on blueprints. A safety analysis method based on blueprints is proposed, which applies mathematical logic to describe the logical relationship between targets and resources provided by the blueprints and uses semi-tensor product of matrix theory to simplify the logical expressions. Based on the mathematical model, we can conduct the fail safety analysis and identify resources failures that may undermine the IMA system safety.

A Study of Debris Flow Behaviors According to Rheometer Properties: Focused on the Hwangnyeong Mt. and Umyeon Mt.

2020 ◽  
Author(s):  
Hyeong-Jin Kim ◽  
Dae-Ho Yun ◽  
Yun-Tae Kim
Keyword(s):  
Debris Flow ◽  
Rheological Properties ◽  
Yield Stress ◽  
Flow Behavior ◽  
Front Velocity ◽  
Experimental Results ◽  
Small Scale ◽  
Water Mixture ◽  
Runout Distance ◽  
Two Samples

<p>A debris flow, a mass movement of soil and water mixture, is generally occurred by heavy rainfall during the rainy season in Korea. Because of climate change, the amount and frequency of rainfall has continually increased these days. Populated areas located in debris flow-prone mountainous areas are commonly subject to debris flow hazards. For this reason, it is necessary to analyze the characteristics of the debris flow behavior for the hazard mitigation. In this study, for two samples from Hwangnyeong Mt. and Umyeon Mt. in Korea, the vane-type rheometer test were performed to estimate the rheological property such as viscosity and yield stress and small-scale flume experiment was carried out to evaluate the characteristics of debris flow behaviors such as front velocity, runout distance and deposition volume. From the experimental results, rheological properties decrease with decreasing volumetric sediment concentration, and debris flow behavior gradually increased with decreasing rheological properties in the experiment. Additionally, in case of Hwangnyeong Mt. which has a high silt and clay fraction, the experimental results show that the amount of the front velocity, runout distance and deposition volume tend to increase higher than Umyeon Mt. as viscosity and yield stress decreased.</p>

Application of TRACE and CFD in the Spent Fuel Pool of Chinshan Nuclear Power Plant

2011 ◽  
Vol 145 ◽  
pp. 78-82 ◽  
Author(s):  
Jong Rong Wang ◽  
Hao Tzu Lin ◽  
Yung Shin Tseng ◽  
Chun Kuan Shih
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Cooling System ◽  
Safety Issue ◽  
Safety Analysis ◽  
Spent Fuel ◽  
Energy Research ◽  
Important Work ◽  
Spent Fuel Pool

In the nuclear power plant (NPP) safety, the safety analysis of the NPP is very important work. In Fukushima NPP event, due to the earthquake, the cooling system of the spent fuel pool failed and the safety issue of the spent fuel pool generated. After Fukushima NPP event, INER (Institute of Nuclear Energy Research, Atomic Energy Council, R.O.C.) performed the safety analysis of the spent fuel pool for Chinshan NPP which also assumed the cooling system of the spent fuel pool failed. The geometry of the Chinshan NPP spent fuel pool is 12.17 m × 7.87 m × 11.61 m and the initial condition is 60 ¢J / 1.013 × 105 Pa. In general, the NPP safety analysis is performed by the thermal hydraulic codes. The advanced thermal hydraulic code named TRACE for the NPP safety analysis is developing by U.S. NRC. Therefore, the safety analysis of the spent fuel pool for Chinshan NPP is performed by TRACE. Besides, this safety analysis is also performed by CFD. The analysis result of TRACE and CFD are similar. The results show that the uncovered of the fuels occur in 2.7 days and the metal-water reaction of the fuels occur in 3.5 days after the cooling system failed.

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