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Visual cognition results from the interaction between objective images and cognitive subjects. In this paper, the concept mental connectivity of visual imagery is proposed for the first time, based on which a novel interpretation of the visual invariance stimulated by objective images is made on the level of global visual cognition. In addition, according to the research on the cognitive difficulty...
The presence of Benzo[a]pyrene (BaP) in polycyclic aromatic hydrocarbons (PAHs) causes them to be extremely harmful and carcinogenic. Therefore, it is essential to develop a convenient and rapid method for BaP detection. Detection of BaP using conventional fluorescence spectrometry suffers from interference from the homologues of BaP. Synchronous fluorescence spectrometry can simplify spectra, promote...
How to make most use of existing information systems and set up low cost, open and flexible integration system have already become the key factor to constructing scientific and technical resources database system. Service oriented architecture (SOA) provides a solution to improve the reusability, scalability and efficiency in software development. This paper uses the SOA principle, through the research...
During the construction of scientific and technical resources database system two problems are urgent to be solved. The first is how to fully protect existing investment, realize the resource integration, and reduce the construction cost. The second is how to respond to the change of the business needs rapidly, constantly meet applications. It is difficult to solve these two problems with existing...
This paper uses metadata technology in the field of information retrieval, and a Web information retrieval model based on metadata and query expansion is designed. In the model the method of metadata design, metadata extraction, metadata storage and query expansion are expatiated. The experiment result shows that the method based on metadata and query expansion can improve the Web information retrieval...
It is well-known that the separately-excited DC motor has effective torque (current) reduction characteristics in response to rapid increase of the rotational speed of the motor. This characteristic has been utilized in adhesion control of electric locomotives with DC motor. In this paper, we have proposed a new skid prevention method for EVs utilizing this characteristic and discussed the possibility...
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