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An Innovation Design of Print Clip for Folded Paper
Tang Wen-yan, Lyu Wen-ge, Zhang Xiao-wei, Cheng Si-yuan, Yang Chun-yan
Journal of Guangdong University of Technology. 2017, 34 (01): 15-18.
DOI: 10.12052/gdutxb.160133
Printer, especially A4 paper printer, has been widely used at home and in the office. Occasionally A3 print paper is used for A4 paper printer. In order to solve the problem, extension innovation method is applied. Contradiction between demand and existing condition is analyzed, and is expressed by basic element. According to the extension analysis and diamond thought, the scheme to solve the above-mentioned condition is formulated step by step. In the end, print clip for folded paper is designed, which solves the problem of printing on the A3 print paper by A4 paper printer. Utility model patent about print clip has been applied and authorized. In sum, the extension innovation method can efficiently guide the procedure of innovation design.
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A Study of Urban Waterlogging Characteristics in Pearl River Delta Region Based on GIS
Huang Tie-lan, Chen Jun-hao, Huang Feng-jie, Su Zhang-can
Journal of Guangdong University of Technology. 2017, 34 (01): 24-30.
DOI: 10.12052/gdutxb.160102
In recent years, urban waterlogging occurred frequently in the Pearl River Delta region. In order to solve this problem, a research is conducted on the characteristics of urban waterlogging, selecting the Pearl River Delta region as a whole. Based on full collection of regional geography and geology, meteorology and hydrology, the relevant research achievements, GIS and remote sensing data and other related information, and analyzed by GIS technology, occurrence situation, temporal and spatial distribution characteristics of urban waterlogging in the Pearl River Delta region are summarized, the main causes analyzed, and the development trend predicted. This research can provide feasible suggestions for the prevention and control of urban waterlogging in Pearl River Delta region.
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Numerical Analysis and Consolidation Mechanism Research of Vacuum-Surcharge Preloading Soft Clay
Xu Chao-yang, Liu Ming, Hu Shu-zhi, Yang Xue-qiang
Journal of Guangdong University of Technology. 2017, 34 (01): 31-39.
DOI: 10.12052/gdutxb.150110
A soft clay consolidation project by using vacuum-surcharge preloading method was conducted in Zhuhai about two year ago, and finite element numerical analysis under two-dimensional plane strain condition, in which modified Cam model and soft clay permeating characteristics are considered, is finished in details for the project, with corresponding calculating results such as soft clay vertical settlement, horizontal displacement, and pore water pressure, et al. beengiven and compared with the project measuring results. Based on the calculation results, the vacuum-surcharge preloading method for the soft clay has a better consolidation effect in practice because of its effective consolidation mechanism.
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Simulation Analysis of Heat Pump System in CO2 TranscriticalCycle Applied to Temperature and Humidity Independent Control
Cheng Tian, Liu Li-ru, Wang Zhang-yuan, Wang Xiao-xia, Ding Ze-zhi
Journal of Guangdong University of Technology. 2017, 34 (01): 40-44.
DOI: 10.12052/gdutxb.150140
The operational principle of CO2 transcritical cycle in the integrated air conditioning system of CO2 transcritical cycle with temperature and humidity independent control is introduced. And the theory analysis and simulation for the system is done by establishing the corresponding mathematics physical model. At the same time, using 100 kw refrigerating quantity as an example, simulation is made on the system combining with Coolpack. Simulating vaporization temperature T E , gas cooler outlet pressure P , gas cooler outlet temperature T 4 of CO2 transcritical cycle, the influence of the simulated result is discovered. The study can provide theoretical support for the application of CO2 transcritical cycle with temperature and humidity independent control
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A Study of Heat Generation Behavior of 18650 Cylindrical Battery
Wang Zi-yuan, Zhang Guo-qing, Gao Guan-yong, Lyu You-fu
Journal of Guangdong University of Technology. 2017, 34 (01): 45-49.
DOI: 10.12052/gdutxb.160057
With the continuous development of new energy vehicles, increasing the thermal safety of the power battery attracts more attention. The data of current, voltage, temperature and time of the 18650 single cell are tested under the constant current 1 C discharge rate, the theoretical calorific value of the cell estimated to be 3 901.51 J based on law of conservation of energy, and the average specific heat and the average heating power is calculated through experimental method to be respectively 5.37 J/(g·K) and 1.08 W. At the same time, the surface/section temperature image of the 18650 single cell through 1 C constant current discharge is simulated by the way of computer simulation. Compared with the experimental data and verified, the error of the maximum temperature is less than or equal to 1℃, which lays a theoretical foundation for the follow-up evaluation of the electric vehicle thermal disaster.
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Influence of Grain Size and Orientation of Electrical Silicon Steel on Work Hardening in the Disc Slitting
Wang Can-ming, Yan Qiu-sheng, Lu Jia-bin, Qiu Xuan-feng, Zhang Xiao-wei
Journal of Guangdong University of Technology. 2017, 34 (01): 55-59.
DOI: 10.12052/gdutxb.150134
Silicon steel sheets with different grain size and orientation are selected to conduct the disc slitting experiment, and the slitting surface morphology and work hardening behavior are studied by analyzing microstructure morphology and micro-hardness. The difference of metallographic structure is great before and after slitting: silicon steel with smaller grain size has larger deformation, while silicon steel with larger grain size is easy to generate the transgranular fracture along with obvious twin structure. The grain size and orientation of silicon steel have a great influence on work hardening. When the grain size is close, the work hardening ability of the non-oriented silicon steel is bigger than that of the grain-oriented silicon steel. When grain orientation of silicon steel is the same, the larger the grain size, the bigger the changing of hardness. The degree of work hardening is directly related to the material deformation in the disc slitting. The fiercer the deformation, the larger the work hardening. Grain orientation of non-oriented silicon steel becomes orderly, which greatly improves the ability to resist plastic deformation. Deformation mechanism of fine granular material is dominated by dislocation slip and the twin deformation mainly occurs in large granular silicon steel.
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A novel LED plane light source
Wang Neng-huo, Zhao Wei-ren, Chen Jun-hua, Meng Ying-jun, Zhou Yi-yang, Zhang Xin
Journal of Guangdong University of Technology. 2017, 34 (01): 65-70,77.
DOI: 10.12052/gdutxb.160033
A novel LED plane light source is studied in the paper. With the fluorescence plate manufactured through high-reflection aluminum board and the blue light LED chip strips, white light emission is realized. Theoretic analysis show that the light-output efficiency of the LED sources can be increased through the coincidence of the light-excited surface of the fluorescence layer and the light output surface of the layer; the epoxy coating on phosphor particles can reduce the incident intensity of blue light to the phosphors, while the uncoated phosphor particles have the higher blue-fluorescence converting efficiency. Light output efficiency can also be raised by the high reflectivity of the substrate of fluorescence epoxy layer. With the help of the light guide plate dots, the light output homogeneous of the plane source can be realized. The absorption cross section and the emission spectrum of the plane source can be adjusted through the change of incident angle of blue light, and high color render index above 95 can be obtained. Furthermore, the isolation between LED chips and phosphors is realized. The light efficiency of the plane sources can be further enhanced through the optimization design and manufacture process, and reaches the commercialization.
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Object Location for Binocular Stereo Vision Based on Improved SIFT Feature
Li De-long, Liu Wei
Journal of Guangdong University of Technology. 2017, 34 (01): 90-94.
DOI: 10.12052/gdutxb.150108
Stereo matching is the most important step in binocular vision, and it is also the most difficult problem to solve. The traditional stereo matching to get the regional disparity map is just passable, for the characteristics of the non-texture regions are difficult to retain the depth map discontinuing, so getting the 3D information of the target is slow and inaccurate, Therefore, a new SIFT image matching is proposed, firstly, making the epipolar constraint on the left and right image; secondly, selecting the ROI of target from the left of binocular images, and reducing running time by reducing the dimension of feature vectors and accelerating the matching speed by using BBF algorithm based on KD tree, and finally, removing the false matching by using RANSAC algorithm. The experiment results show that the improved SIFT algorithm can get the target's feature points quickly and accurately, so the 3D coordinates can be calculated by the triangulation method speedy.
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