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Song J.,Shenyang Ligong University | Zhang G.,Shenyang Artillery Academy of PLA | Sun P.,Shenyang Artillery Academy of PLA | Feng N.,Shenyang Artillery Academy of PLA | Xu S.,Shenyang Artillery Academy of PLA
Advances in Intelligent and Soft Computing | Year: 2012

The measuring accuracy of the TDR cable length measurement system relies on the recognition of the reflected wave. The reflected wave is susceptible to be affected by noise and the reflected wave detecting error is comparatively large. In order to correctly identifying and detecting the reflected wave, this dissertation studies four reflected wave recognition algorithms, which are established according to the threshold method, centroid method, polynomial fitting method and the wavelet modulus maxima method respectively. The advantages and disadvantages of these algorithms are analyzed. The repeatability and accuracies of the reflected wave arrival time for these algorithms are compared through practical applications. © 2012 Springer-Verlag GmbH.


Chen L.,Shenyang Ligong University | Chen L.,Northeastern University China | Xu S.,Shenyang Artillery Academy of PLA | Zhang G.,Shenyang Artillery Academy of PLA | Xia Z.,Shenyang Artillery Academy of PLA
Applied Mechanics and Materials | Year: 2012

According to electromagnetic waves theories, emissivity modeling of a layered casting surface has been developed to elucidate the different emissivity during the growth of oxide film. Through test detection a angle where p-polarized emissivity assumes a peak value is between 60°-80°. Emissivity stabilized when the growth of oxide film is enough. The conclusion provides an important theory for the design the temperature measurement equipment on the surface of casting. © (2012) Trans Tech Publications, Switzerland.


Song J.,Shenyang Ligong University | Tao Z.,Shenyang Artillery Academy of PLA | Zhang G.,Shenyang Artillery Academy of PLA | Lv X.,Shenyang Artillery Academy of PLA | Xu S.,Shenyang Artillery Academy of PLA
Advances in Intelligent and Soft Computing | Year: 2012

Traveling wave velocity is the key to the measuring accuracy of the time-domain reflectometry cable length measurement system. The velocity value is affected by many factors. In order to reduce the velocity frequency characteristics impact on time-domain reflectometry cable length measurement system, the effect of frequency on traveling wave velocity is studied, the velocity curve of traveling wave as a function of frequency is established. The traveling wave velocity in coaxial cable as a function of cable length is measured. The experimental results show that the signal frequency is different in different cable lengths because of attenuation and different frequency corresponds to different velocity. © 2012 Springer-Verlag GmbH.


Yu Y.,Shenyang Ligong University | Chen J.,Shenyang Ligong University | Zhang G.,Shenyang Artillery Academy of PLA | Tao Z.,Shenyang Artillery Academy of PLA
Communications in Computer and Information Science | Year: 2011

SVM is a rising in common use learning technology base on Statistical Learning Theory. In view of the variety of the changes of burning flame in large-scale boiler, in order to master the status of the furnace flame in real time. In this paper, it introduces the SVM network absorb the basic method of flame-picture's temperature, to study thoroughly discussed about the SVM network model, and puts forward an improved SVM network method, as for the method to calculate three-dimensional temperature field, which has many advantages to the traditional optimization method. Taking the SVM network using to test the three-dimensional temperature field in the furnace is feasible by the simulation studies and the experimental results. © 2011 Springer-Verlag Berlin Heidelberg.


Yu Y.,Shenyang Ligong University | Zhang M.,Shenyang Ligong University | Zhang G.,Shenyang Artillery Academy of PLA | Niu J.,Shenyang Artillery Academy of PLA
Advanced Materials Research | Year: 2012

Based on the algorithm of Scale invariant feature transform SIFT, informed a method to detection the airport runway foreign objects based on the algorithm of improved SIFT, first roughly extracts object through the image segmentation algorithm, then match the object on it's SIFT features, ensure it's features stability, enhance the matching accuracy. Experimental results show that this method can not only handle the problems of tar-get losing evidently, which are induced by objects rotation and translation, but also has nice robustness to the conjunction of multi-targets in the process of object tracking. © (2012) Trans Tech Publications, Switzerland.

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