The outlier detection algorithm based on reverse k-nearest neighbors can detect isolated points. The time complexity of finding the k-nearest neighbor is O(kN2), which is not suitable for large data set, and the selec...
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In order to overcome the energy and environmental problems, biological hydrolysis of cellulosic material for ethanol production is a way to take the place of fossil fuels. But, the major problem of above process is th...
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Lac operon is the most typical and thorough studied operon, and the lac promoter in this operon is widely used in construction of efficient prokaryotic expression plasmid. Mathematical modeling is useful in studying t...
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In crowd animation production, it is difficult to design realistic and natural crowd motion paths using traditional methods. In order to solve the problems in generating paths of a crowd, a new approach based on an in...
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In crowd animation production, it is difficult to design realistic and natural crowd motion paths using traditional methods. In order to solve the problems in generating paths of a crowd, a new approach based on an interactive evolutionary algorithm(EA) named biogeography-based optimization(BBO) is proposed in this paper. The optimization process of individuals is considered as the motion process of a crowd. Specifically, the new approach is applied into a system to generate crowd motion paths and the simulation results demonstrate the efficiency and effectiveness of it.
In enzymatic hydrolysis of cellulose, the composition of the enzyme system and the ratio of the enzyme activities are important factors for efficient hydrolysis of cellulose. With the proper ratio of cellulase to β-g...
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Bioethanol is promising in the era faced with the energy crisis and environmental problems. In order to decrease the bioethanol production cost, optimization of the bioethanol fermentation process is essential. The ae...
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We present a physically-based animation method for simulating the diffusion of water pollutant in this paper. Our method allows animating the dynamic evolution of biological pollutants(e.g., water hyacinth, algae) on ...
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We present a physically-based animation method for simulating the diffusion of water pollutant in this paper. Our method allows animating the dynamic evolution of biological pollutants(e.g., water hyacinth, algae) on largescale water surface effectively. To enable the simulation of such a phenomenon in large scale virtual environment, we simplify the problem by considering the water pollutants as large patches or clusters of aquatic plants rather than each single aquatic plant. Since there exits obvious interface between the large patches of pollutants and the water surface, we model the evolution of the interface in our approach. We use 2D dynamic curves to represent the interface and the diffusion of the water pollutants can be regarded as the dynamic evolution and propagation of 2D curves. To alleviate the topological changes of 2D curves, we adopt a physically-based 2D level set model to animate the evolution and propagation of the interface. We build a level set equation to model the evolution of the interface. In addition, to handle the large scale virtual environment correctly in our physically-based level set model, an imagebased 2D voxelization method is proposed in the paper. In the voxelization method, the virtual environment will be converted to boundary conditions when solving the level set equation. Finally, the water pollutants diffusion phenomenon is simulated on large scale water surface by merging the interface animation results as well as the large scale virtual environment. Animation results about the algae propagation phenomenon in Taihu Lake show that our method is intuitively to be implemented and very convenient to produce visually interesting results.
Fermentation process using recombinant strain for production of recombinant protein is widely used in commercialization of the biotechnologies. The continuous stirred tank reactor (CSTR) is a typical microbial cultiva...
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With the increase of the number of college and university students,the amount of senate system data is correspondingly rising. As the core of university management,educational administration and its degree of informat...
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With the increase of the number of college and university students,the amount of senate system data is correspondingly rising. As the core of university management,educational administration and its degree of information are directly related to the university teaching quality and management efficiency. Compared with the traditional course enrolment,online course system can better reflect the wide application of information technology on campus,which was more convenient to communicate the information among schools,teachers,and students. Relying on the popular B/S three-tier architecture,we designed the online course system with a good interaction,scalability,and a strong security. This paper ***-based network technology elective system development process,outlined the function of online course selecting system,and its relevant technology.
With the emergence of new applications,the traditional methods of mining frequent itemsets are confronted with enormous challenges in uncertain *** one of the most classic algorithms,Eclat algorithm is regarded as a p...
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With the emergence of new applications,the traditional methods of mining frequent itemsets are confronted with enormous challenges in uncertain *** one of the most classic algorithms,Eclat algorithm is regarded as a promising approach whose effciency is experimentally proved in mining expected support-based frequent itemsets,while it has not received much attention in the area of mining probabilistic frequent *** this paper,we review the previous effcient algorithms in the research of frequent itemsets mining over uncertain database,and then we propose a vertical mining algorithm with Eclat framework,which can mine all probabilistic frequent itemsets exactly and *** order to study its performance,we design difierent experiments to evaluate its performance on both synthetic and real data sets,which shows that the vertical mining algorithm is simple to implement and perform well in practice.
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