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Online since: April 2014
Authors: Chuan Wen Luo, Tian Kai Chen, Qiu Xia Yang
Remote sensing classification, as an important means of urban planning and construction, has been widely concerned. Urban land use classification is extremely challenging tasks because of some land covers are spectrally too similar to be separated using only the spectral information of remote sensing image. Object-oriented remote sensing image classification method overcomes the drawbacks of traditional pixel-based classification method. It combines the spectral, special structure and texture features of the images, can effectively avoid the phenomenon of "different objects share the same spectrum" or "the same objects differ in spectrum. Support Vector Machine (SVM) is an excellent tool for remote sensing classification. Combination of both can develop their own advantages to do high-resolution remote sensing image classification. Using a public image in Harbin city as an example, classification based on object-oriented method and SVM has achieved better results than traditional pixel-based classification method.
Online since: January 2013
Authors: Rui Song Yang, Ming Tian Li, Lan Ying Yu
The epoxy cathodic electrodeposition (CED) coating modified by organic siloxane has been prepared. EP-44 resin was modified by aminosiloxane and organic amine, then to be neutralized with organic acid and emulsified in deionized water with blocked isocyanate as curing agent. The CED films were electrodeposited on tinplate, and the properties of the paint films were investigated. The results indicated that the films shown good performance.
Online since: December 2012
Authors: Zhao Sheng Yang, Chun Lin Tian, Song Nan Liu
Real-time scheduling and signal priority strategies play a critical role in improving the service quality of Bus Rapid Transit (BRT) system. The delays of public passengers and social vehicles are essential factors that should be considered for signal priority control. This paper proposes a signal priority algorithm for BRT based on intersection resource integration from the angle of intersection time and space combinatorial optimization, which combined optimize lane functional partitioning and green ratio allocation. The results of the data validation proves that the optimization model can significantly reduce the BRT vehicle delay at the intersection, while reducing the adverse effects of social vehicles.
Online since: May 2013
Authors: Qian Cheng Zhao, Dong Zhao Huang, Tian Long Yang
Tool path is usually described by means of continuous small linear segments. It results in large number of programming points in order to achieve high precision. A construction method of tool path based on arc-cell is presented in this paper, and the tool path is G1 continuous. The construction method is applied to describe the tool path of wave shape specimen and hill shape specimen. For the two specimens, when their tool paths are described based on continuous small segments, 128212 and 184954 linear segments are necessary, respectively. But when their tool paths are described based on arc-cell, 15838 and 21669 arc-cells are necessary, respectively. And its more important that these arc-cells include information of curvatures and arc-lengths to control acceleration and deceleration.
Online since: December 2014
Authors: Kai Yu Yang, Ju Xian Wang, Zhan Yang An, Tian Hao Wang, Yin Han Gao
Based on the transmission line theory, this paper applies the mode theory to predict the MTL(multi-conductor transmission line) crosstalk by selecting voltage as the research object, thus establish the model of estimating MTL crosstalk in inhomogeneous medium. Then make numerical calculation in MATLAB for the estimate model established in this paper, and also compare the calculated values with the simulated values in EMC studio. The compared results show that the calculated results of this model is highly consistent with the practical simulated values, verifying the correctness and feasibility of mode theory in MTL crosstalk prediction.
Online since: January 2012
Authors: Yang Yang Qiao, Guo Fu Tian, Xian Feng Liu, Guo Wen Zhang
Hydraulic torque converter’s performance testing is very important in the product’s development and production. In order to accurately and rapidly test various performance parameters of the hydraulic torque converter, a torque converter performance test system was developed based on the PC and VB development platform in this paper. It can improve computing speed and programming capability, decrease artificial involved times, realize the data analysis processing’s automation.
Online since: May 2014
Authors: Yin Han Gao, Zhan Yang An, Kai Yu Yang, Tian Hao Wang
Analyze of university-industry-research cooperation’s characteristics which the university is the main target, and each case has been specifically addressed, characteristics of the cooperation were discussed, and detailed analysis of the relationship between the characteristics of the main features of each. From the perspective of their own cooperation feature, further discusses the characteristics of cooperation.
Online since: September 2013
Authors: Yan Gao, Tian Xiang Chang, Yang Yang Wang, Yao Liu, Hong Yan Quan, Jian Zhong Xu
According to Assemble line balancing (ALB) problem which is widespread in manufacture, we establish a mathematical model and present our improved algorithm that is based on Heuristic rules, which adopt cumulative ranked positional weight as a basis of task assignments and schedule the orders of branches traversal. After that we can find an optimal solution to the balancing problem efficiently. The result of examples given by this paper shows our algorithm has a good performance.
Online since: April 2004
Authors: Tian Hong Yang, Chun An Tang, Chien Hsin Yang, Tao Xu
In this paper, theoretical constitutive model, numerical tool, viz., RFPA code and servo-type testing machine, viz., RMT-150B rock testing systems were briefly described, respectively. Then, based on theoretical analysis, numerical simulation and experimental tests for rock specimens in uniaxial compression, the relations and differences between theoretical, numerical and experimental results, especially the complete stress-strain curves, were contrastively analyzed and investigated. The reason for these relations and differences among results was also proposed in this paper.
Online since: May 2011
Authors: Sheng Rong Xie, Hong Zeng Yang, Hong Bin Li, Chun Yang Tian, Fu Lian He
Aiming at problem of low coal mining rate and environmental pollution by gangue, replacement mining technology of source recovery by excavating large span roadway and backfilling with gangue is put forward in this paper. Then combined control technology of roof cable truss and coalside cable-channel steel is applied to support the large span roadway, its control mechanism is discussed and the combined support scheme is defined by way of numerical simulation. Besides, according to the practice production condition, the replacement system which consists of gangue pretreatment, transport and replacement is established, achieving harmonic extraction of resource recovery and environmental protection and providing scientific basis and technological means for resource recovery under other geological conditions.