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.

Clinical and Pathological Characteristics of Intraocular Cysticercosis

Juan-Juan Li,Li-Wei Zhang,Hua Li,Zhu-Lin Hu 대한기생충학열대의학회 2013 The Korean Journal of Parasitology Vol.51 No.2

A 10-Year Retrospective Analysis of Clinical Profi Les, Laboratory Characteristics and Management of Pyogenic Liver Abscesses in a Chinese Hospital

( Xiao Juan Zhu ),( Shao Hui Wang ),( Ravi Jacob ),( Zhi Ning Fan ),( Fa Ming Zhang ),( Guo Zhong Ji ) 대한소화기기능성질환·운동학회 2011 Gut and Liver Vol.5 No.2

Background/Aims: Pyogenic liver abscess (PLA) is a serious, life threatening condition with a high mortality rate that represents a diagnostic and therapeutic challenge. The aim of this study was to collect demographic data and clinical, laboratory and microbiological characteristics of PLA patients treated between 2000 and 2010. We also aimed to collect information regarding our management experience of these cases. Methods: As a retrospective review, 47 patients with PLA in a tertiary referral center were examined to determine their demographic characteristics, clinical features, and laboratory, imaging, and microbiologic findings as well as the treatment outcome. Results: Cryptogenic PLA was the most frequently identified type of PLA, while benign biliary tract disease was the most frequently identifi able cause of PLA (18/47 patients; 38.3%). Leukocytosis and elevated alanine transaminase were common laboratory findings and were observed in 35 (74.5%) and 22 (46.8%) patients, respectively. Increased fibrinogen was also detected in 11 of 15 investigated cases (73.3%). Notably, infection-induced thrombocytopenia occurred in 8 patients (17%). Diabetes mellitus was associated with the occurrence of infection induced shock when compared to the non-diabetic group (p<0.05). Patients with two or more comorbid diseases had longer hospitalizations when compared to patients with one comorbid disease or those without comorbidities (p<0.001). The number of days needed to establish diagnosis was correlated with the length of hospitalization (p<0.001). The overall hospital mortality rate was 2.1% (1/47). Conclusions: Characteristics of PLA patients from the past 10 years are presented. The number of days needed to establish a PLA diagnosis was correlated with the length of the hospital stay. The hospital stay of PLA patients can be further improved by early diagnosis and effective treatments during the early stages of PLA progression. (Gut Liver 2011;5:221-227)

애니메이션 서사에서 캐릭터의 대한 작용력의 방향성을 통한 항력과 불가항력의 변화 분석

주문연(Zhu, Wen Juan),김명삼(Kim, Myeong Sam) 한국디자인리서치학회 2020 한국디자인리서치 Vol.5 No.1

본 연구에서는 애니메이션 서사에서 캐릭터의 작용력의 방향성 변화를 분석했고, 캐릭터의 작용력을 항력과 불가항력으로 체계적으로 분류하였다. 그리고 그 방향성 변화는 긍정성과 부정성의 상황을 보여준다. 기존 연구에서는 애니메이션 캐릭터 측면에 관한 연구는 이미 여러 가지 테마가 존재하지만, 작용력의 방향에서 캐릭터의 작용력의 방향을 통한 연구는 아직 미미한 상태이다. 따라서 본 연구는 물리적 힘과 정신저 힘과 더불어 서사학을 통해 애니메이션 서사 작용력의 개념을 확인하고, 캐릭터 작용력의 방향 변화에 대한 단일성과 상호성 그리고 애니메이션 스토리지 발전에 미치는 영향을 파악했다. 애니메이션 사례 분석을 통하여 연구 결과를 도출한다면 캐릭터의 작용력의 방향 변화는 긍정적이고 부정적인 영향을 미친다. 이는 캐릭터 간의 관계를 보여주며 이러한 변화의 원인은 캐릭터가 통제할 수 있고 통제 불가능한 상황으로 인해 발생했다. 또한, 애니메이션에서의 항력과 불가항력 요소를 일반적인 개념으로부터 체계적으로 구분했다. This study analyzes the directional changes of character forces in animated narratives, systematically classifies the role forces into Irresistible force and Resistable force, In the existing research, there are various themes on the research of animated characters, but from the perspective of the force direction, the research on the direction of the role force is still in a state of minimal. Therefore, this study confirms the concept of animation narrative force through narratology, and grasps the unity and mutuality of the change in the direction of the role force, and the impact on the development of animation stories Through the analysis of animation cases, the research results show that the change in the direction of the role force has positive and negative effects. This represents the relationship between the roles. These changes are caused by situations in which the character can be controlled and not controlled. In addition, a clear distinction is made between the Irresistible force and Resistable force elements in the animation from the general concept of systematization.

Click Synthesis of Hydrogels by Metal-Free 1,3-Dipolar Cycloaddition Reaction Between Maleimide and Azide Functionalized Polymers

Hong-Zheng Zhu,Gang Wang,Hong-Liang Wei,Hui-Juan Chu,Jing Zhu 한국고분자학회 2016 Macromolecular Research Vol.24 No.9

Herein, a metal-free 1,3-dipolar cycloaddition click reaction was used to prepare hydrogels. First, copolymer of N,N-dimethylacrylamide and 2-hydroxyethyl methacrylate was synthesized via free radical copolymerization with an initiator of 2,2'-azobisisobutyronitrile and a solution of 1,4-dioxane. Second, maleimide-functionalized polymer was obtained by a coupling reaction of the above synthesized copolymer and N-maleoyl alanine with a dehydrating agent of N,N'-dicyclohexylcarbodiimide. Similarly, azido-modified polymer was prepared by the reaction between azidoacetic acid and the as-prepared copolymer. Third, the hydrogels were obtained by the reaction of the azidomodified polymer and maleimide-functionalized copolymer without any initiator or catalyst. Gelation times of different conditions were measured by a cuvette inversion method. The samples of different steps were analysized by means of FTIR, NMR, SEM, etc. The swelling behaviour of the gels was investigated via a general gravimetric method. Finally, release mechanism was explored with a model drug molecule of 5-fluorouracil. It was found temperature, concentration and solvent had an impact on the gelation time. And the swelling behavior and drug-controlled release profiles of the hydrogels were relevant to the concentration of polymers used for the hydrogels.

Fucoidan inhibits LPS-induced acute lung injury in mice through regulating GSK-3β-Nrf2 signaling pathway

De-Zhang Zhu,Yan-Ting Wang,Yan-Li Zhuo,Kong-Juan Zhu,Xiang-Zhen Wang,Ai-Jie Liu 대한약학회 2020 Archives of Pharmacal Research Vol.43 No.6

The purpose of this study was to investigatethe protective eff ects of fucoidan on Lipopolysaccharide(LPS)-induced acute lung injury (ALI) in mice. The micewere divided into the control, LPS, and LPS + fucoidan(20, 40, or 80 mg/kg) groups. LPS was given by intrachealinstillation and fucoidan was given 1 h before LPS treatment. Myeloperoxidase (MPO) activity, malondialdehyde(MDA), superoxide dismutase (SOD), reactive oxygen species(ROS), glutathione (GSH) contents, and infl ammatorycytokine production were detected. The results showed thatLPS-induced TNF-α, IL-1β, and IL-6 production, lung wet/dry (W/D) ratio, ROS, MDA content, and MPO activity weresuppressed by fucoidan. The levels of SOD and GSH wereincreased by fucoidan. Meanwhile, LPS-induced nuclearfactor kappa-B (NF-κB) activation was dose-dependentlyattenuated by fucoidan. Furthermore, fucoidan increasedthe expression of nuclear factor erythroid-2 related factor2 (Nrf2), Glycogen synthase kinase3β (GSK-3β), and hemeoxygenase (HO-1). In vitro, the results demonstrated thatfucoidan or GSK-3β inhibitor signifi cantly inhibited LPSinducedTNF-α production in A549 cells. And the inhibitionof fucoidan on TNF-α production was blocked by Nrf2siRNA. This study showed fucoidan protected mice againstLPS-induced ALI through inhibiting inflammatory andoxidative responses via regulating GSK-3β-Nrf2 signalingpathway.

Identification and expression profiles of putative chemosensory protein genes in Cnaphalocrocis medinalis (Lepidoptera: Pyralidae)

Su Liu,Xiao-Xiao Shi,Qing-Zi Zhu,Wen-Juan Jiao,Zi-Jie Zhu,Hang Yu,Gui-YaoWang,Zengrong Zhu 한국응용곤충학회 2015 Journal of Asia-Pacific Entomology Vol.18 No.1

Insect chemosensory proteins (CSPs) are small, water-soluble proteins which can bind and transport hydrophobic odorants through sensillum lymph to activate odorant receptors, thus play important roles in the olfactory recognition. In the present study, by searching the transcriptome data sets, a total of 22 candidate CSP genes were identified from Cnaphalocrocis medinalis, a serious lepidopteran rice pest in Asia. CSP proteins encoded by these genes showed typical characteristics: an N-terminal signal peptide, four conserved cysteine residues and the pattern of cysteine spacing. The expression profiles of these putative CSP genes were investigated using real-time quantitative PCR. The results showed that five genes (CmedCSP4, CmedCSP8, CmedCSP11, CmedCSP18 and CmedCSP21) were expressed primarily in antennae, suggesting their involvement in olfactory processes; whilst other genes are mainly expressed in non-olfactory tissues, such as abdomen and legs, indicating a broader physiological function for these CSPs. The findings will lead to a better understanding of the molecular mechanisms of chemoreception in C. medinalis.

Synthesis of CuS/ZnO Nanocomposite and Its Visible-Light Photocatalytic Activity

Zhu, Lianping,Zheng, Min,Lu, Juan,Xu, Mengfei,Seo, Hyo Jin Hindawi Limited 2014 Journal of nanomaterials Vol.2014 No.-

<P>The CuS/ZnO nanocomposite was successfully synthesized by a simple mechanical method, without adding any surfactants. TEM images showed that CuS existed in the nanocomposite and the size of CuS/ZnO nanocomposite particle was around 35 nm. CuS worked as an electron absorber in the nanocomposite, which was beneficial for the improvement of photocatalysis of ZnO. It was also proved by the experiments performed under the visible light irradiation that CuS could help ZnO degrade methylene blue (MB). The catalytic efficiency of the nanocomposites reached the highest value when 0.5 wt% CuS was added. In addition, compared with pure ZnO, the CuS/ZnO nanocomposite exhibited a better photochemical stability up to 5 catalytic cycles. More importantly, CuS did not reduce the antibacterial property of ZnO. All these results indicated that as-prepared samples had some potential values in practical applications.</P>

Low-Temperature Synthesis of Highly Efficient, Deep-Red Zn-Cu-In-Se/ZnSe Fluorescence Quantum Dots

Juan Yang,Jingling Li,Yanqing Zhu,Xueqing Xu,Xiudi Xiao,Bing Deng,Kaili Qin,Zhuoneng Bi,Shuaijun Chen,Gang Xu 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2019 NANO Vol.14 No.6

We report a facile synthesis method on CuInSe2 (CISe)-based quantum dots (QDs) by using tri-n-octylphosphine selenium (TOPSe) as selenide precursor, with assistance of oleylamine (OAm) and n-dodecanethiol (DDT). We demonstrate that the OAm and DDT jointly contribute to the formation of the low-temperature-decomposable metal-sulfide clusters, and promote the QD nucleation at relatively low temperature range of 180–200 ℃. Furthermore, to improve fluorescence property, Zn-doping and ZnSe coating are simultaneously carried out. The obtained deep-red ZnCISe/ZnSe QDs possess higher quantum yield of 65% at wavelength of 670 nm, which is in the best performance range ever reported. Then, we investigate the improvement mechanism, where the sufficient Zn replacement of In sites is the crucial factor. This modified core–shell structure provides two benefits, on the one hand, the enhancement on intrinsic defect-related recombination, and the other hand, the improved core–shell interface that reduces the nonradiative recombination.

A Z-scheme CuO–ZnO–ZnS–CuS quaternary nanocomposite for solar-light-driven photocatalytic performance

Zhu Wenli,Yang Qiaoling,Du Juan,Yin Pinpin,Yi Jun,Liu Yanmei,Wu Xuemei,Zhang Zhongyi 한국물리학회 2022 Current Applied Physics Vol.39 No.-

A quaternary CuO–CuS–ZnO–ZnS nanocomposite was successfully synthesized via a facile microwave irradiation based on the preprepared ZnS and CuO nanoparticles. CuO–CuS–ZnO–ZnS nanocomposite was a porous photocatalyst, providing excellent adsorption performance. It was sensitive to both ultraviolet and visible light, moreover, the photoelectrochemical measurements confirmed that there was a high separation rate and low recombination rate of photo-generated charge carriers in the nanocomposite, endowing excellent photocatalytic activity in the sunlight. Under the simulated solar light irradiation, the removal efficiency of rhodamine B (RhB) pollutant (30 mg/L) over CuO–CuS–ZnO–ZnS nanocomposite was 33.98 and 2.90 times of pristine CuO and ZnS, respectively. The outstandingt photocatalytic performance was attributed to Z-scheme charge transfer path.