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SHADOW DETECTION ALGORITHM FOR MOVING VEHICLE DETECTION
Wenju Li,Ying Li 한국멀티미디어학회 2006 한국멀티미디어학회 국제학술대회 Vol.2006 No.-
Detection of moving vehicles is one of the most important tasks in a video traffic Surveillance system.. However, problems arise due to shadows. Shadows can affect the correct localization, measurement and detection of moving vehicles. Shadow detection is critical for robust and reliable vision-based traffic system. The studies show that color information can improve the discrimination between object and shadow. At present, color-based shadow detection methods are mainly for RGB and HSV color spaces. There is one problem in using RGB color space, namely it has three correlated color planes, so the image analysis can not be done in each plane separately. There are two problems in using HSV color space: (1) hue is meaningless when the intensity is very low or very high; and (2) hue is unstable when the saturation is very low. A new shadow detection algorithm is put forward in this paper. The major novelty of the shadow detection technique is hotelling transform is used to achieve un correlated color components, and a shadow measure was defined for shadow detection. The experimental results show that the proposed algorithm is robust to shadow.
Pantropical climate interactions
Cai, Wenju,Wu, Lixin,Lengaigne, Matthieu,Li, Tim,McGregor, Shayne,Kug, Jong-Seong,Yu, Jin-Yi,Stuecker, Malte F.,Santoso, Agus,Li, Xichen,Ham, Yoo-Geun,Chikamoto, Yoshimitsu,Ng, Benjamin,McPhaden, Mich American Association for the Advancement of Scienc 2019 Science Vol.363 No.6430
<P><B>Tropical interconnections</B></P><P>The El Niño–Southern Oscillation, which originates in the tropical Pacific, affects the rest of the world's tropics by perturbing global atmospheric circulation. Less appreciated than this influence is how the tropical Atlantic and Indian Oceans affect the Pacific. Cai <I>et al.</I> review what we know about these pantropical interactions, discuss possible ways of improving predictions of current climate variability, and consider how projecting future climate under different anthropogenic forcing scenarios may be improved. They argue that making progress in this field will require sustained global climate observations, climate model improvements, and theoretical advances.</P><P><I>Science</I>, this issue p. eaav4236</P><P>The El Niño–Southern Oscillation (ENSO), which originates in the Pacific, is the strongest and most well-known mode of tropical climate variability. Its reach is global, and it can force climate variations of the tropical Atlantic and Indian Oceans by perturbing the global atmospheric circulation. Less appreciated is how the tropical Atlantic and Indian Oceans affect the Pacific. Especially noteworthy is the multidecadal Atlantic warming that began in the late 1990s, because recent research suggests that it has influenced Indo-Pacific climate, the character of the ENSO cycle, and the hiatus in global surface warming. Discovery of these pantropical interactions provides a pathway forward for improving predictions of climate variability in the current climate and for refining projections of future climate under different anthropogenic forcing scenarios.</P>
Min Li,Lujun Song,Xiaodong Gao,Wenju Chang,Xinyu Qin 생화학분자생물학회 2012 Experimental and molecular medicine Vol.44 No.4
Type 1 diabetes mellitus is caused by the autoimmune destruction of β cells within the islets. In recent years,innate immunity has been proposed to play a key role in this process. High-mobility group box 1 (HMGB1), an inflammatory trigger in a number of autoimmune diseases,activates proinflammatory responses following its release from necrotic cells. Our aim was to determine the significance of HMGB1 in the natural history of diabetes in non-obese diabetic (NOD) mice. We observed that the rate of HMGB1 expression in the cytoplasm of islets was much greater in diabetic mice compared with non-diabetic mice. The majority of cells positively stained for toll-like receptor 4 (TLR4) were βcells; few α cells were stained for TLR4. Thus, we examined the effects of anti-TLR4 antibodies on HMGB1 cell surface binding, which confirmed that HMGB1 interacts with TLR4 in isolated islets. Expression changes in HMGB1 and TLR4 were detected throughout the course of diabetes. Our findings indicate that TLR4 is the main receptor on β cells and that HMGB1 may signal via TLR4 to selectively damage β cells rather than αcells during the development of type 1 diabetes mellitus.
CYP19 gene variant confers susceptibility to endometriosis-associated infertility in Chinese women
Ledan Wang,Xiaosheng Lu,Danhan Wang,,Wenju Li,Xiaowen Xu,Qiusui Huang,Xueying Han,Jieqiang Lv,Wanglei Qu 생화학분자생물학회 2014 Experimental and molecular medicine Vol.46 No.-
An aromatase encoded by the CYP19 gene catalyzes the final step in the biosynthesis of estrogens, which is related to endometriosis development. To assess the association of CYP19 gene polymorphisms with the risks of endometriosis, chocolate cysts and endometriosis-related infertility, a case–control study was conducted in Chinese Han women by recruiting 225 healthy control females, 146 patients with endometriosis, 94 endometriosis women with chocolate cyst and 65 women with infertility resulting from endometriosis, as diagnosed by both pathological and laparoscopic findings. Individual genotypes atrs2236722:T4C, rs700518:A4G, rs10046:T4C and [TTTA]n polymorphisms were identified. Allelic and genotypic frequencies were compared between the control group and case groups by chi-square analysis. Odds ratios (ORs) and 95% confidence intervals (95% CIs) were determined by logistic regression analysis to predict the association of CYP19 gene polymorphisms with the risk of endometriosis, the related chocolate cysts and infertility. The genotype distributions of the tested CYP19 gene polymorphisms were not significantly different between the healthy control group and the endometriosis/endometriosis with the chocolate cyst group. However, the CYP19 rs700518AA genotype was significantly associated with an increased risk of endometriosis-related infertility (55.4% in the infertility group vs 25.3% in the control group, Po0.001;OR (95% CI): 3.66 (2.06–6.50)) under the recessive form of the A allele. Therefore, we concluded that in Chinese Han females CYP19 gene polymorphisms are not associated with susceptibility to endometriosis or chocolate cysts, whereas CYP19 rs700518AA genotype confers genetic susceptibility to endometriosis-related infertility.
Endothelial Progenitor Cells Correlated with Oxidative Stress after Mild Traumatic Brain Injury
Xintao Huang,Dahai Wan,Yunpeng Lin,Naizhao Xue,Jiehe Hao,Ning Ma,Xile Pei,Ruilong Li,Wenju Zhang 연세대학교의과대학 2017 Yonsei medical journal Vol.58 No.5
Purpose: Endothelial progenitor cells (EPCs) play a key role in tissue repair and regeneration. Previous studies have shown that infusion of human umbilical cord blood-derived endothelial colony-forming cells improves outcomes in mice subjected to experimentaltraumatic brain injury (TBI). However, the efficiency of cell transplantation is not satisfactory. Oxidative stress plays a significant role in the survival of transplanted cells following ischemic reperfusion injury. This observational clinical study investigatedthe correlation between the number of circulating EPCs and plasma levels of superoxide dismutase (SOD) and malonyldialdehyde(MDA). Materials and Methods: Peripheral blood samples were collected from 20 patients with mild TBI at day-1, day-2, day-3, day-4, and day-7 post TBI. The number of circulating EPCs and the plasma levels of SOD and MDA were measured. Results: The average of circulating EPCs in TBI patients decreased initially, but increased thereafter, compared with healthy controls. Plasma levels of SOD in TBI patients were significantly lower than those in healthy controls at day-4 post-TBI. MDA levels showed no difference between the two groups. Furthermore, when assessed on day-7 post-TBI, the circulating EPC number were correlated with the plasma levels of SOD and MDA. Conclusion: These results suggest that the number of circulating EPCs is weakly to moderately correlated with plasma levels of SOD and MDA at day-7 post-TBI, which may offer a novel antioxidant strategy for EPCs transplantation after TBI.
JieHui JU,WeiZheng BAO,ZhongYou WANG,Ya WANG,WenJuan LI,WenJuan LI 보안공학연구지원센터 2014 International Journal of Grid and Distributed Comp Vol.7 No.5
In cloud computing environment, there are a large number of users which lead to huge amount of tasks to be processed by system. In order to make the system complete the service requests efficiently, how to schedule the tasks becomes the focus of cloud computing Research. A task scheduling algorithm based on PSO and ACO for cloud computing is presented in this paper. First, the algorithm uses particle swarm optimization algorithm to get the initial solution quickly, and then according to this scheduling result the initial pheromone distribution of ant colony algorithm is generated. Finally, the ant colony algorithm is used to get the optimal solution of task scheduling. The experiment simulated on CloudSim platform shows that the algorithm has good effect in real-time performance and optimization capability. It is an effective task scheduling algorithm.