The BP network has the disadvantages such as low learning efficiency, low speed of convergence, easily falling into the local minimum state, poor ability to adapt, ect. For PSO algorithm, it is fast for convergence, e...
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This paper proposes a method for verifying the pose and the type of different resistors mounted on a PCB. First, the pose of the resistor on the PCB is determined and missing resistors are detected by shape_based temp...
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This paper proposes a method for verifying the pose and the type of different resistors mounted on a PCB. First, the pose of the resistor on the PCB is determined and missing resistors are detected by shape_based template matching. Then, the type of the resistor is extracted and compared to the known reference type by edge_based template matching. Finally, six types of resistors have been verified on 120 resistor images. Experiments have shown that the shape_based template can be used to determine the pose of the resistor even if it appears rotated and scaled. The proposed method can achieve the accuracy of 100% and average recognition time of 0.15 s .
It's introduced domestic and overseas current development of Static Synchronous Compensator, and analyzed principle of STATCOM, and combining lots of information, respectively summarized the control technique of S...
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ISBN:
(纸本)9781612844589
It's introduced domestic and overseas current development of Static Synchronous Compensator, and analyzed principle of STATCOM, and combining lots of information, respectively summarized the control technique of STATCOM based on control mode and control tactics.
Based on finite element analysis software ANSYS, a company warehouse properties of door type steel frame structure has been studied under the action of fire. Taking the whole structure as research object, the paper us...
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Based on finite element analysis software ANSYS, a company warehouse properties of door type steel frame structure has been studied under the action of fire. Taking the whole structure as research object, the paper used beam element and shell element to simulate the column, prime beam, second beam and concrete slab in the structure respectively. When linking the slab and the beam by beam connection and linking the column and the beam by pin connection at the same time, the influences of the whole structure have been considered based on different areas affected by fire. The results of analysis draw three conclusions. Firstly, large-span and strong constraints beam of structure and column-beam joint are the adverse regions affected by fire. Secondly, the column which bears multiple components is the weak link of steel structure. Finally, it is the temperature gradient in the direction of slab thickness that plays a crucial role in the ability of the overall fire resistance of steel structure.
Motor Schema-based formation control system is chosen to be the main research direction. Five sub-behaviors called move-to-goal, avoidobstacle, swirl, noise and keep-formation are introduced for the line formation con...
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Motor Schema-based formation control system is chosen to be the main research direction. Five sub-behaviors called move-to-goal, avoidobstacle, swirl, noise and keep-formation are introduced for the line formation control mission. Using Teambots simulation system, the line formation is simulated. Neighbor-referenced method for formation position determination has been adopted. Aiming at the line formation, single-neighbor-referenced and double-neighbor-referenced methods are used. The simulations experiments data indicate that double-neighbor-referenced method reduces the running time, improves performance and achieve stability.
In order to improve the capability of the fault diagnosis, this paper introduces the Decision Directed Acyclic Graph(DDAG) algorithm and establishes a new detection and diagnosis system combing the DDAG with the Kerne...
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In order to improve the capability of the fault diagnosis, this paper introduces the Decision Directed Acyclic Graph(DDAG) algorithm and establishes a new detection and diagnosis system combing the DDAG with the Kernel Principal Component Analyses(KPCA) method. The hybrid system uses KPCA and DDAG to detect and identify the fault. A specific description of the principles and procedures about how to use KPCA method and DDAG is given. The new detection and diagnosis system has an excellent performance in the fault detection and diagnosis of the Tennessee-Eastman(TE) process. This paper gives a new way to research the fault detection and diagnosis in industrial nonlinear system.
Path planning of the robot is searching the best motion path with some appropriate algorithm under some certain constraint condition. Path planning is the foundation of motion control of the robots. Based on the kinem...
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There are many factors to affect the 3G system performance, while adjacent channel interference is an important affecting factor to the coexistence network of WCDMA and TD-SCDMA. In this paper, the adjacent channel in...
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The working principle of the mechanical feed system of Φ630 automatic pipe chamfering machine is introduced in this paper, and the working state of the feed system is analyzed in order to provide a theoretical basis ...
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The working principle of the mechanical feed system of Φ630 automatic pipe chamfering machine is introduced in this paper, and the working state of the feed system is analyzed in order to provide a theoretical basis for the servo control of feed system. The detection principle of the feed system and the detection method of the feed speed and displacement are also emphasized, and the calculating formula of the electronic gear ratio is presented to offer theoretical reference for equipment site commissioning.
Image feature matching in three-dimensional information acquisition technology is an important aspect of machine vision, in order to achieve the real-time and matching robustness requirement, an image registration...
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Image feature matching in three-dimensional information acquisition technology is an important aspect of machine vision, in order to achieve the real-time and matching robustness requirement, an image registration method based on SURF algorithm is proposed. First construct Hessian matrix based on box-type filter, use SURF algorithm to calculate the information of feature points, then decompose characteristics of feature points and match feature points. Experimental results show that the matching speed of SURF algorithm is 4 times as fast as the SIFT algorithm, greatly improves the real-time and robustness.
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