No59 Research Institute Of China Ordnance Industry

Chongqing, China

No59 Research Institute Of China Ordnance Industry

Chongqing, China
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Wang Y.,Zhejiang University | Luo Z.,No59 Research Institute Of China Ordnance Industry | Xu Z.,Zhejiang University | Feng H.,Zhejiang University | And 2 more authors.
2016 IEEE International Conference on Signal and Image Processing, ICSIP 2016 | Year: 2017

As an important research area in image analysis and computer vision, fusion of infrared and visible images aims at delivering an effective combination of image information from different sensors. Since the final fused image is the demonstration of fusion process, it should reveal both source images' vital information distinctly. To achieve this purpose, an image fusion method based on multiscale hybrid unidirectional total variation (MHUTV) and visual weight map(VWM) is proposed in this paper. The MHUTV combines the feature of extracting the details from images and the capacity of suppressing stripe noise, which leads to a more ideal visual effect. The MHUTV is a multiscale, unidirectional and self-adaption image decomposition method, which is used to fuse infrared and visible images in this paper. The visual weight map aims to reveal attention drawing distribution of human observer. It provides a subband fusion criterion, which can guarantee the highlighting of interesting area from infrared and visible images. Firstly, multiscale hybrid unidirectional total variation is discussed and used to decompose the source images into approximation subbands and detail subbands. Secondly, the approximation and details subbands are respectively fused by a fusion rule based on visual weight map. Finally, the fused subbands are combined into one image by implementing inverse MHUTV. The results of comparison experiments on different sets of images demonstrate the effectiveness of the proposed method. © 2016 IEEE.


Zhang W.,No59 Research Institute Of China Ordnance Industry | Kang F.,No59 Research Institute Of China Ordnance Industry | Hu C.,No59 Research Institute Of China Ordnance Industry | Shu D.,No59 Research Institute Of China Ordnance Industry | Ning H.,No59 Research Institute Of China Ordnance Industry
Xiyou Jinshu/Chinese Journal of Rare Metals | Year: 2011

The various characteristic of titanium alloy decided its difficulty cutting performance. Cutting performance tests of a new kind of low-cost titanium alloy-Ti8LC were put up. With the finite method, the cutting process of the titanium was reappeared. At the same time, the rules which influenced parameters on cutting resistance and feeding resistance were obtained. The main cutting resistance and the feeding resistance were raised greatly along with the increase of the cutting deepness, whereas the feed-rate had little influence on the cutting resistance. With the farther cutting tests, the influence of cutting parameters, such as cutting-rate, feed-rate and feed, on the main cutting resistance and feeding resistance of titanium alloy were analyzed. The results indicated that the cutting resistance was bigger than that of the simulation. So, the cutting speed of the titanium alloy should be in (120~160) m · min-1 with the present cutter, or else made the cutting resistance suddenly increase due to the severe abrasion of the cutter.


Ning H.Q.,No59 Research Institute Of China Ordnance Industry | Zhu S.F.,No59 Research Institute Of China Ordnance Industry | Hu Q.H.,No59 Research Institute Of China Ordnance Industry | Li Z.R.,No59 Research Institute Of China Ordnance Industry | And 4 more authors.
Materials Research Innovations | Year: 2013

Multiaxial forging (MAF) was used as a strain induced melt activated (SIMA) process. The coarsening kinetics of the MAF formed AZ91D during partial remelting has been investigated. With increasing temperature, liquid is formed initially by the eutectic with lower melting point at boundaries and penetrates the recrystallised boundaries. Prolonged holding time resulted in grain coarsening. Grain coarsening in the semisolid state can be described by classical LSW (Lifshiz, Slyozov and Wanger) equation in Ostwald ripening. The coarsening rate does decreases with increasing temperature, for temperature lower than 560°C, and then increases again with further increasing temperature from 560 to 570°C. © W. S. Maney & Son Ltd. 2013.


Huang Z.W.,No59 Research Institute Of China Ordnance Industry | Huang J.,No59 Research Institute Of China Ordnance Industry | Deng T.Q.,No59 Research Institute Of China Ordnance Industry | Huang X.X.,No59 Research Institute Of China Ordnance Industry | And 4 more authors.
Materials Research Innovations | Year: 2013

For the alloy to be shaped in the semisolid state, it must have an appreciable melting range; before thixoforming, the microstructures must consist of solid metal spheroids in a liquid matrix. Equal channel angular extrusion (ECAE) was used as a process to predeform as cast AZ80 magnesium alloy before partial remelting. The results show that fine and equiaxed grains are obtained due to dynamic recrystallisation during ECAE. Following partial remelting in each case, the microstructure consisted of globular solid grains with liquid film along the grain boundaries. During partial remelting, solid grain sizes at 560°C were smaller than those at 550°C. Moreover, the degree of spheroidisation at 560°C was greater than that at 550°C. Good mechanical properties are obtained for the thixoformed AZ80 alloy prepared by six-pass ECAE with a yield strength of 210 MPa, an ultimate tensile strength of 320 MPa and an elongation to fracture of 9·2%. The results also show that the process, ECAE plus partial remelting, can produce fine and spheroidal solid grains surrounded by liquid film, which are suitable for thixoforming. © W. S. Maney & Son Ltd. 2013.


Kang F.,No59 Research Institute Of China Ordnance Industry | Yang E.C.,Chongqing University of Technology | Chen Q.,No59 Research Institute Of China Ordnance Industry | Hu C.K.,No59 Research Institute Of China Ordnance Industry
Applied Mechanics and Materials | Year: 2014

Aim at the bending and upsetting process of a kind of crankshaft, this paper analyze the technical difficulty and treatment measures during the process. The metal flowing and the defects easily occur during the deformation are visual reappeared by the FEM, moreover, the influence of the thickness of flash and the size of fillet on the quality of crank is also analyzed. Takes the crank as an object, the experiment of bending and upsetting deformation is carried on, which verified the accuracy of the simulation result, and finally, the crank is qualified with fullness deformation, continuous fiber without collapsing or folding. The product with this process can satisfied all the specification of the technology. © (2014) Trans Tech Publications, Switzerland.


Liu J.,No59 Research Institute Of China Ordnance Industry | Liu J.,Nanjing University of Science and Technology | Wang W.,Ocean University of China | Wang J.,Ocean University of China | Wang J.,CAS Shenyang Institute of Metal Research
Cailiao Kexue yu Gongyi/Material Science and Technology | Year: 2013

To research the failure mechanism of epoxy coating under soaking condition, the deterioration process of epoxy coating immersed in natural seawater was investigated by the wire beam electrode (WBE) and electrochemical impedance spectroscopy (EIS) techniques, and the differences of the current density distribution and EIS characteristics for local regions with defects in the coating were analyzed. The results show that the current density distribution has a close corresponding relationship with EIS characteristics in the whole or local areas, and WBE technique combined with EIS is a powerful tool to investigate the corrosion process of anodic and cathodic regions of the defects and underlying coatings. During the entire coating deterioration process, the EIS characteristics were positively correlated with the substrate corrosion process of the most serious defect, and other regions of the coating and underlying electrochemical processes were suppressed. The polarity transition of the electrode under the coating was observed, and the reasons for the phenomena were different from each other.

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