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The metabolic network model allows for an in-depth insight into the molecular mechanism of a particular organism. Because most parameters of the metabolic network cannot be directly measured, they must be estimated by using optimization algorithms. However, three characteristics of the metabolic network model, i.e., high nonlinearity, large amount parameters, and huge variation scopes of parameters,...
With the intensifying requirements of intelligent software, self-healing system becomes increasingly imperative. Such systems attempt to "heal" themselves in the sense of recovering from faults. The system is usually represented at a higher-level of abstraction than a program, such as Extended Finite State Machines (EFSMs), in which a fault could be regarded as a restricted operational environment...
It's effective restoration approach to analyze the balance of water using and find out the water gap for Yongding River in Beijing in the face of ecological deterioration. This paper described the thrice water balance principle, connotation and theory based on the supply and demand balance, rationality and feasibility analysis. On this basis, this paper evaluated and analyzed the water resources condition,...
Reliability is a main technical index for aircraft of long life cycle and long storage period. Periodic test is a reasonable confirmation for keep a good reliability of aircraft system. If inspection and maintenance periodically is too long or short, it may exercise an influence upon low reliability and high economy. So, the optimal testing period is the effective way for a good reliability of aircraft...
The tryptophan operon (trp operon), paradigm for repressible operons, is regulated by three different negative-feedback mechanisms of repression, transcription attenuation and enzyme inhibition. Initiation of transcription is controlled by the interaction of the tryptophan repressor with its target site on the operator. Moreover, the interaction among the regulator genes, the operator genes and the...
The change of base program's structure in AOP (aspect-oriented programming) system will lead to the fragile pointcut problem. This paper presents an AOP framework and its implementation based on conceptual model. This framework regards the conceptual layer as the middle layer between base program and aspect, and it achieves decoupling between them by weaving the aspect into the object in the conceptual...
Structural conflict is one of the key issues in the development of the aspect-oriented software. We propose a framework based on the conceptual model and the reflection mechanism to solve the structural conflict. It achieves decoupling between the base program and definition of the pointcut by adding a conceptual level between them. In the process of implementing the framework, we consider the meta...
Based on 327 data from three universities and five virtual communities in China, this study investigated factors affecting customer satisfaction of Chinese online shoppers based on virtual community. A SEM model was used. 8 hypotheses among the total 11 hypotheses in SEM model were confirmed in the final. Results show three main findings: (a) Chinese online shoppers are facing "information overload",...
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