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Dongying, China

This paper presented a model with overload function for cascading failure. The main differences with respect to previous models are as follows: overload function is defined for each node, according to the value of overload function, one node has th ree states: success, overload, failure. After the load decreases, an overloaded node can be success again. The evolution of topology is replaced by the evolution of value of overload function during the process of cascading failure. It's needless to delete the failure nodes and its edges, the load will avoid the failure nodes automat ically and the decrease of network performance will be reflected by network efficiency. An evaluation method of node importance considering cascading failure is proposed, and its algorithm is presented. A new definition of node importance is proposed. The most important node is the one who see failure results in the largest decrease of networks efficiency at the end of cascading. The evaluation method can help us to find some potential critical nodes which are sensitive to the efficiency of networks but not so important intuitively. Final example verifies its efficiency and feasibility. © (2014) Trans Tech Publications, Switzerland.

Zhang Y.P.,Dongying Vocational College
Advanced Materials Research | Year: 2014

At present, most of research on node importance evaluation is concentrated on static un-weighted network. For weighted networks, this paper presented a new evalution method of node importance based on load flow in the node-weighted network, and it was based on the contribution of the nodes for the whole network in the view of microscopic and macroscopic. The most important node was the one which was determined by the outputing load, inputing load and crossing load between the different nodes. The improved evaluation method could help exactly to find some critical nodes which ware sensitive to the efficiency of networks. Final, example verifies its efficiency and feasibility. © (2014) Trans Tech Publications, Switzerland.

Li J.,Dongying Vocational College
Asian Journal of Chemistry | Year: 2012

Utilizing a biodegradable cross-linker, acryloyloxyethylaminopolysuccinimide (AEA-PSI), poly(N-isopropylacrylamide) (PNIPAAm) microgels and core-shell structure microgels were prepared via free-radical precipitation polymerization and their phase transition behaviour, phase transition temperature (PTT), hydrodynamic diameters and size distributions (polydispersity indexes, PDI) were investigated. To prepare small-sized and lower PDI PNIPAAm microgels, the optimum parameters should be selected as the concentrations of AEA-PSI, N-isopropylacrylamide (NIPAAm), ammonium peroxodisulfate (APS) and sodium dodecyl sulfate (SDS) were 1.34, 7.56, 0.152 and 0.18 g/L and the hydrodynamic diameter of the microgels was 353.8 nm (PDI, 0.24). All the microgels dispersions exhibited thermoresponsive phase transition at 30.0-32.5 °C. Using microgels as seeds, the core-shell PNIPAAm microgels were prepared. With increasing the weight ratio of the NIPAAm/AEA-PSI from 1.3:1 to 3:1 and 5:1 in the shell materials, the hydrodynamic diameter of the core-shell microgels increases from 376.4 to 432.5 and 472.3 nm at 25 °C, respectively. The morphologies of the microgels particles were also investigated by the atomic force microscopy (AFM). The AFM images illuminated that the core-shell microgels particles had symmetrical sizes and non- aggregation, indicating better stability. Compared with the core microgels, the shell-core microgels appear a smoother and denser surface.

Chen G.T.,Dongying Vocational College
Advanced Materials Research | Year: 2014

The relationship among the thermal parameters of supercharging system of internal combustion engine is very complicated. They affect and constrain each other. It is comparatively difficult to find out their changing rules and interactions, let alone the special supercharging system of natural gas engine. This paper is aimed to calculate and find out the internal connections among all parameters by rationally selecting parameters collected from experiences and establishing mathematical model for the supercharging thermal parameters of natural gas engine based on diesel engine's supercharging estimation method, so as to provide theoretical basis for matching the supercharging system. © (2014) Trans Tech Publications, Switzerland.

Zhang Y.P.,Dongying Vocational College
Advanced Materials Research | Year: 2014

This paper studies the computer network traffic related subjects background first, and analyzes the research status quo of network traffic monitoring, putting forward the main content and the research target. This paper introduces the key technology, network traffic monitoring system for the topological design and analysis of computer network traffic monitoring system, computer network traffic monitoring system for the overall design, network traffic monitoring has been basically achieved demand. From the point of view of network users and network operators, network traffic monitoring can improve the scientific and rationality of network management having important research value. © (2014) Trans Tech Publications, Switzerland.

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