Surf points based Moving Target Detection and Long-term Tracking in Aerial Videos

( Juan-juan Zhu ),( Wei Sun ),( Bao-long Guo ),( Cheng Li ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.11

A novel method based on Surf points is proposed to detect and lock-track single ground target in aerial videos. Videos captured by moving cameras contain complex motions, which bring difficulty in moving object detection. Our approach contains three parts: moving target template detection, search area estimation and target tracking. Global motion estimation and compensation are first made by grids-sampling Surf points selecting and matching. And then, the single ground target is detected by joint spatial-temporal information processing. The temporal process is made by calculating difference between compensated reference and current image and the spatial process is implementing morphological operations and adaptive binarization. The second part improves KALMAN filter with surf points scale information to predict target position and search area adaptively. Lastly, the local Surf points of target template are matched in this search region to realize target tracking. The long-term tracking is updated following target scaling, occlusion and large deformation. Experimental results show that the algorithm can correctly detect small moving target in dynamic scenes with complex motions. It is robust to vehicle dithering and target scale changing, rotation, especially partial occlusion or temporal complete occlusion. Comparing with traditional algorithms, our method enables real time operation, processing 520×390 frames at around 15fps.

Effect of support on the performance of Mn–Cu oxides for low temperature selective catalytic reduction of NO with NH3

Wei-Guo Pan,Jie-nan Hong,Rui-Tang Guo,Wen-long Zhen,Hong-lei Ding,Qiang Jin,Cheng-gang Ding,Shi-yi Guo 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4

MnOx–CuOx/TiO2 and MnOx–CuOx/Al2O3 catalysts were prepared by sol–gel method and used for low temperature selective catalytic reduction of NO with NH3. The results showed that MnOx–CuOx/TiO2 had better catalytic activity and SO2 resistance than MnOx–CuOx/Al2O3 in the temperature range of 100–250 ℃. The properties of the catalysts were characterized by using XRD, N2 adsorption, temperature programmed reduction (H2-TPR) and temperature programmed desorption (NH3-TPD). It was found that the support has a great impact on the acidity of catalyst; TiO2 and Al2O3 can promote the formation of Lewis acid sites and Bro¨ nsted acid sites respectively.

Effect of preparation methods on the performance of CeO2/Al2O3catalysts for selective catalytic reduction of NO with NH3

Rui-Tang Guo,Yue Zhou,Wei-Guo Pan,Jie-nan Hong,Wen-long Zhen,Qiang Jin,Cheng-gang Ding,Shi-yi Guo 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.6

CeO2/Al2O3 catalysts prepared by three methods were investigated for selective reduction of NO with NH3. It was found that the catalyst prepared by the single step sol–gel method had the best SCR activity and SO2 resistance performance. From the results of BET, XRD, TPD and TPR, it can be concluded that large surface area, strong interaction, highly dispersed nano-crystalline ceria, high NH3 adsorption capacity and good redox ability might be the main reasons for the excellent performance of CeO2/Al2O3catalyst prepared by the single step sol–gel method.

Effect of Cu doping on the SCR activity of CeO2 catalyst prepared by citric acid method

Rui-Tang Guo,Wen-long Zhen,Wei-Guo Pan,Yue Zhou,Jie-nan Hong,Hong-jian Xu,Qiang Jin,Cheng-gang Ding,Shi-yi Guo 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4

CeO2–CuO catalyst prepared by citric acid method was investigated for selective catalytic reduction of NO with NH3. The activity of the CeO2 catalyst was enhanced about 8–27% in the temperature range of 125–225 ℃ at a space velocity of 28,000 h 1 by the addition of Cu. It was found that the state of Cu species had great impact on the SCR performance of CeO2–CuO catalyst. Cu2+ can enhance the low temperature activity of SCR reaction, while CuO would promote NH3 oxidation before SCR reaction at high temperature, which would cause the decrease of its high temperature SCR activity.

Anaerobic membrane bioreactors for antibiotic wastewater treatment: Performance and membrane fouling issues

Cheng, Dongle,Ngo, Huu Hao,Guo, Wenshan,Liu, Yiwen,Chang, Soon Woong,Nguyen, Dinh Duc,Nghiem, Long Duc,Zhou, Junliang,Ni, Bingjie Elsevier 2018 Bioresource technology Vol.267 No.-

<P><B>Abstract</B></P> <P>Antibiotic wastewater has become a major concern due to the toxicity and recalcitrance of antibiotics. Anaerobic membrane bioreactors (AnMBRs) are considered alternative technology for treating antibiotic wastewater because of their advantages over the conventional anaerobic processes and aerobic MBRs. However, membrane fouling remains the most challenging issue in the AnMBRs’ operation and this limits their application. This review critically discusses: (i) antibiotics removal and antibiotic resistance genes (ARGs) in different types of AnMBRs and the impact of antibiotics on membrane fouling and (ii) the integrated AnMBRs systems for fouling control and removal of antibiotics. The presence of antibiotics in AnMBRs could aggravate membrane fouling by influencing fouling-related factors (i.e., sludge particle size, extracellular polymeric substances (EPS), soluble microbial products (SMP), and fouling-related microbial communities). Conclusively, integrated AnMBR systems can be a practical technology for antibiotic wastewater treatment.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Removal of antibiotics and their effects on membrane fouling in AnMBRs are reviewed. </LI> <LI> AnMBRs are efficient for treating antibiotic wastewater mainly by biodegradation. </LI> <LI> The presence of antibiotics in AnMBRs will aggravate membrane fouling. </LI> <LI> Integrating AnMBRs with biofilm carriers and BES is efficient in fouling control. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Enhancement of Hyaluronic Acid Production by Batch Culture of Streptococcus zooepidemicus via the addition of n-Dodecane as an Oxygen Vector

Long Liu,Hai Quan Yang,Dong Xu Zhang,Guo Cheng Du,Jian Chen,Miao Wang,Jun Sun 한국미생물 · 생명공학회 2009 Journal of microbiology and biotechnology Vol.19 No.6

Theoretical research on the identification method of bridge dynamic parameters using free decay response

Guo-jin Tan,Yong-chun Cheng,Han-bing Liu,Long-lin Wang 국제구조공학회 2011 Structural Engineering and Mechanics, An Int'l Jou Vol.38 No.3

Input excitation and output response of structure are needed in conventional modal analysis methods. However, input excitation is often difficult to be obtained in the dynamic load test of bridge structures. Therefore, what attracts engineers’ attention is how to get dynamic parameters from the output response. In this paper, a structural experimental modal analysis method is introduced, which can be used to conveniently obtain dynamic parameters of the structure from the free decay response. With known damping coefficients, this analysis method can be used to identify the natural frequencies and the mode shapes of MDOF structures. Based on the modal analysis theory, the mathematical relationship of damping ratio and frequency is obtained. By using this mathematical relationship to improve the previous method, an improved experimental modal analysis method is proposed in this paper. This improved method can overcome the deficiencies of the previous method, which can not identify damping ratios and requires damping coefficients in advance. Additionally, this improved method can also identify the natural frequencies, mode shapes and damping ratios of the bridge only from the free decay response, and ensure the stability of identification process by using modern mathematical means. Finally, the feasibility and effectiveness of this method are demonstrated by a numerical example of a simply supported reinforced concrete beam.

Neutropenia during the First Cycle of Induction Chemotherapy Is Prognostic for Poor Survival in Locoregionally Advanced Nasopharyngeal Carcinoma: A Real-World Study in an Endemic Area

Cheng Xu,Shi-Ping Yang,Yuan Zhang,Ling-Long Tang,Guan-Qun Zhou,Xu Liu,Yan-Ping Mao,Rui Guo,Wen-Fei Li,Lei Chen,Ai-Hua Lin,Ying Sun,Jun Ma 대한암학회 2018 Cancer Research and Treatment Vol.50 No.3

Purpose The purpose of this study was to investigate the effect of neutropenia during the first cycle of induction chemotherapy (IC-1) on survival in locoregionally advanced nasopharyngeal carcinoma (LANPC). Materials and Methods Eligible patients (n=545) with LANPC receiving IC+concurrent chemoradiotherapy were included. Based on nadir neutrophil after IC-1, all patients were categorized into three groups: no/grade 1-2/grade 3-4 neutropenia. Five-year overall survival (OS) and disease-free survival (DFS) were compared between groups and subgroups stratified by IC regimen. We also explored the occurrence of IC-1–induced myelosuppression events and the minimal value of post-treatment neutrophil-to-lymphocyte ratio (post-NLRmin). Univariate/multivariate analyses were performed to investigate the effect of IC-1–induced neutropenia, timing of neutropenia, number of myelosuppression events, and high post-NLRmin on OS/DFS. Results Grade 1-2/grade 3-4 neutropenia were associated with poorer OS/DFS than no neutropenia (all p < 0.05); OS/DFS were not significantly different between patients experiencing grade 1-2 vs. 3-4 neutropenia. Neutropenia had no significant effect on OS/DFS in patients receiving docetaxel–cisplatin–5-fluorouracil (TPF). Grade 1-2 (grade 3-4) neutropenia negatively influenced OS/DFS in patients receiving cisplatin–5-fluorouracil (PF) (PF and docetaxel– cisplatin [TP]; all p < 0.05). Neutropenia, two/three myelosuppression events, and high post-NLRmin ( 1.33) was most frequent on days 5-10, second and third week of IC-1, respectively. After adjustment for covariates, IC-1–induced neutropenia, two/three myelosuppression events, and post-NLRmin  1.33 were validated as negative predictors of OS/DFS (all p < 0.05); timing of neutropenia had no significant effect. Conclusion Occurrence of neutropenia, number of myelosuppression events, and high post-NLRmin during PF/TP IC-1 have prognostic value for poor survival in LANPC.

Morphology-dependent Optical Properties of One-dimensional Nanostructure-arrayed Silicon

Shao-long Wu,Guo-an Cheng,Rui-ting Zheng,Xiao-ling Wu 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.6

The optical properties of one-dimensional nanostructure-arrayed silicon (1DNSASi), which wasfabricated by the metal assisted electroless chemical etching method under different conditions,were characterized in the wavelength range of 220 - 1000 nm. Whether the optical absorption ofthe 1DNSASi was enhanced relative to that of the polished Si was determined from the detailedmorphology of the 1D nanostructures. For the yellow 1DNSASi prepared at a high etchant concentrationand high temperatures, its optical absorption was relatively nice in the ultraviolet lightregion, while a gradual attenuation was shown in the visible and the near-infrared regions, and theoptical absorption was lower than that of the polished Si at wavelengths above 800 nm. When theeffects of zeroth-order reflectance and zero transmission were combined, the optical absorption ofthe black 1DNSASi prepared at a low etchant concentration and room temperature was very high(> 99%) in the wavelength range of 220 - 1030 nm and displayed a slight decrease at wavelengthsabove 1030 nm. Our results demonstrate that the optical absorption of the black 1DNSASi couldbe further improved by increasing the etching depth and exhibited its measurable maximum valuewhen the etching depth was large enough. These results indicate that the 1DNSASi may be apromising candidate for high-efficiency photovoltaic devices, high-sensitivity sensors and detectors.

Theoretical research on the identification method of bridge dynamic parameters using free decay response

Tan, Guo-Jin,Cheng, Yong-Chun,Liu, Han-Bing,Wang, Long-Lin Techno-Press 2011 Structural Engineering and Mechanics, An Int'l Jou Vol.38 No.3

Input excitation and output response of structure are needed in conventional modal analysis methods. However, input excitation is often difficult to be obtained in the dynamic load test of bridge structures. Therefore, what attracts engineers' attention is how to get dynamic parameters from the output response. In this paper, a structural experimental modal analysis method is introduced, which can be used to conveniently obtain dynamic parameters of the structure from the free decay response. With known damping coefficients, this analysis method can be used to identify the natural frequencies and the mode shapes of MDOF structures. Based on the modal analysis theory, the mathematical relationship of damping ratio and frequency is obtained. By using this mathematical relationship to improve the previous method, an improved experimental modal analysis method is proposed in this paper. This improved method can overcome the deficiencies of the previous method, which can not identify damping ratios and requires damping coefficients in advance. Additionally, this improved method can also identify the natural frequencies, mode shapes and damping ratios of the bridge only from the free decay response, and ensure the stability of identification process by using modern mathematical means. Finally, the feasibility and effectiveness of this method are demonstrated by a numerical example of a simply supported reinforced concrete beam.