http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Facial Feature Extraction Based on Weighted ALW and Pulse-Coupled Neural Network
Junhua Liang,Zhisheng Zhao,Xiao Zhang,Xuan Wang,Yang Liu 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.8
In order to improve the robustness of face identification with the changes of illumina-tion, expression and facial alteration, a new facial feature extraction algorithm based on weighted adaptive lifting wavelet(ALW) scheme and pulse-coupled neural network (PCNN) is involved in this paper. The face images are decomposed into several subbands by weighted adaptive lifting scheme. Then the PCNN is utilized to decompose each weighted subbands into a series of binary images, the entropies of which are calculated and regarded as facial features. Experimental results show that the method yields a good robustness against the illumination, expression and facial variability and reduces the computer burden.
Junhua Wang,Yuechao Liang,Min Xu 한국광학회 2016 Current Optics and Photonics Vol.20 No.2
A new method to design a low distortion, even relative illumination, optical see-through head-mounteddisplay (HMD) with a freeform reflective mirror (FFRM) based on the two similar ellipsoids structureis proposed. The HMD we have realized has a simple structure which consists of two similar ellipsoidsurfaces, an FFRM, a 7-piece co-axis relay lens, and an OLED. This structure can be applied to offsetdistortion, reach even relative illumination, and correct the off-axis aberrations. The HMD we finally haverealized has a near 3% low distortion, a higher than 80% relative illumination, and a 40°×30° field ofview (FOV).
Design of a See-Through Head-Mounted Display with a Freeform Surface
Junhua Wang,Min Xu,Yuechao Liang 한국광학회 2015 Current Optics and Photonics Vol.19 No.6
This paper described an off-axis head-mounted display system. It is composed of a 7-piece coaxial relaylens group and a freeform surface combiner. This configuration has a simple structure and a wide fieldof view (FOV). In this design, a freeform surface is chosen as the combiner, to simplify the structureand attain good image quality. We generated this freeform surface by considering both coordinates andnormals of discrete data points. Moreover, we realize a coaxial structure in the relay lens group, whichis compact and benefits from a loose tolerance requirement. The HMD system we finally realized hasa 40° × 30° FOV and 15-mm exit pupil diameter
Li Peng,Ma Xiaoxiao,Liang Yurong,Tan Junhua,Wang Liyong 한국탄소학회 2019 Carbon Letters Vol.29 No.6
Nanoporous carbon/MnO2 (C–MnO2) composites with foam-like structure based on modified nitrile butadiene rubber were achieved by thermal treatment, followed by alkaline solution etching and dipping method. The XRD, nitrogen adsorption and desorption, and SEM and TEM were used to characterize the microstructure of the obtained C–SiO2, C and C–MnO2. Finally, all the obtained samples have been used in three-electrode system to study the electrochemical properties including cyclic voltammetry, galvanostatic charge/discharge and AC impedance for supercapacitor. The study found that the specific capacity of C–MnO2 electrode material for supercapacitor could reach as high as 109 F/g under the current density of 0.5 A/g, which is much higher than those of the other two. These superior electrochemical properties are attributed to the synergistic effect MnO2 particles with the C matrix which functions as a conductive support.
Peng Li,Xiaoxiao Ma,Yurong Liang,Junhua Tan,Liyong Wang 한국탄소학회 2019 Carbon Letters Vol.29 No.6
Nanoporous carbon/MnO2 (C–MnO2) composites with foam-like structure based on modified nitrile butadiene rubber were achieved by thermal treatment, followed by alkaline solution etching and dipping method. The XRD, nitrogen adsorption and desorption, and SEM and TEM were used to characterize the microstructure of the obtained C–SiO2, C and C–MnO2. Finally, all the obtained samples have been used in three-electrode system to study the electrochemical properties including cyclic voltammetry, galvanostatic charge/discharge and AC impedance for supercapacitor. The study found that the specific capacity of C–MnO2 electrode material for supercapacitor could reach as high as 109 F/g under the current density of 0.5 A/g, which is much higher than those of the other two. These superior electrochemical properties are attributed to the synergistic effect MnO2 particles with the C matrix which functions as a conductive support.
Hamidreza Arandiyan,Lei Ma,S.M. Hashemnejad,M.Z. Mirzaei,Jinghuan Chen,Huazhen Chang,Caixia Liu,Chizhong Wang,Liang Chen,Junhua Li 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.6
The perovskite metal-oxides LaNixFe1-xO3 (0 ≤ x ≤ 1) were synthesized by a sol–gel method and investigated for the DR, POM, and CRM into synthesis gas. The catalysts were characterized by using XRD,BET, CA, SEM, EDS, HR-TEM, EDX and TPR in order to investigate the influence of the preparation parameters and evaluation condition. LaNi0.4Fe0.6O3 showed great stability, and fewer carbon deposits were detected on the spent catalyst after 1800 min evaluation on TOS. The effect of GHSV on the catalytic performance was investigated. The results obtained showed the H2/CO molar-ratio was around 0.9, 1.7,and 1.1 over different catalysts for DR, POM and CRM, respectively.