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The paper is focused on the problem of 3D reconstruction of structured scenes from uncalibrated images based on vanishing points. Under the assumption of three-parameter-camera model, we prove that with a certain preselected world coordinate system, the camera projection matrix can be uniquely determined from three mutually orthogonal vanishing points that can be obtained from images. We also prove...
Uninhabited combat aerial vehicles (UCAVs) task allocation problem is one of the most important issues in UCAV research. This paper refers to an extension of the mixed-integer linear programming (MILP) task allocation model. Through analyzing the model characteristics, and combining with the advantages and disadvantages of co-evolutionary genetic algorithm, this paper modifies the mechanism of search...
To deal with the low efficiency and difficulty in production management and quaLity control of aero-engine assembly process, this paper proposed an Assembly Manufacturing Execution System (AMES) to reduce the assembly faults and improve the efficiency of management. According to ISA95 standard, it adopted activity models for assembly manufacturing and quaLity management to describe the functions of...
Evaluating performance of practice course is a difficult problem in the process of teaching. On the basis of analyzing the existing fuzzy evaluation models, this paper establishes a fuzzy comprehensive evaluation model based on analytic hierarchy process (AHP). Three-level index evaluation system is set up combining the characteristics of curriculum design in computer major. Relative and comprehensive...
To deal with database security of Management Information System (MIS), a database encryption solution is designed and implemented. Analyzing the relation of database openness and security in the traditional model of MIS, the paper constructs an improved security model of MIS. Based on database encryption theory, a multilevel cipher solution of application system is implemented in SQL Server 2005....
The paper focuses on the problem of structure and motion recovery from a monocular image sequence under quasi-perspective projection model. Previous study on this problem adopts singular value decomposition (SVD) to the tracking matrix with rank constraint. The method is time consuming and does not work for incomplete data. In this paper, we propose to adopt power factorization to the problem. The...
Security of wireless local area network (WLAN) is a research hotspot at all times. Although many researches concerning security standards, principles and algorithms have been published, the implementation solution is seldom focused on. This paper studies the architecture of WLAN security authentication based on WLAN authentication and privacy infrastructure (WAPI) and presents a software solution...
Recovering the 3D structure and motion of nonrigid object from a monocular image sequence is an important and difficult task in computer vision. Many previous methods on this problem utilize the extension technique of SVD factorization based on rank constraint to the tracking matrix. In this paper, we propose a constrained power factorization (CPF) algorithm that combines the orthonormal constraint...
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