Research on Video Analysis and Tracking Technology in Swimming Video

Ni An 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.9

This paper proposes the tracking method for swimmer in the video with Kalman filtering prediction. The Kalman initiates the swimmer with feature such as the location of object and the size of its enclosing rectangle which can be got in the detection proceeding, which are used to predict the feature of the tracked simmer in subsequent frames and ascertain the scope for searching the tracked object. The results of experiments show that this method can be used to provide information for controlling cameras and this can help to track the swimmer in the next frames.

Limonoids from the roots of Trichilia sinensis and their cytotoxicities

Zhu-Nian Wang,Wen-Li Mei,Hui-Qin Chen,Jun Wang,Zhu-Nian Wang,Hao Fu Dai 대한약학회 2018 Archives of Pharmacal Research Vol.41 No.12

Six new compounds (1–4, 8, 10), along with six known limonoids (5–7, 9, 11, 12), were isolated from the roots of Trichilia sinensis. Their structures were elucidated on the basis of extensive spectroscopic methods including 1H NMR, 13C NMR, DEPT, HSQC, HMBC, 1H–1H COSY and ROESY experiments, as well as by comparison with the literature. All the compounds were evaluated for cytotoxicities against K562, SGC-7901 and BEL-7402 cell lines. Compounds 2, 7, 10, 11, and 12 showed weak inhibitory activity to the selected cell lines.

Antioxidant, Antiproliferative, and Pro-Apoptotic Activities of a Saponin Extract Derived from the Roots of Panax notoginseng (Burk.) F.H. Chen

Nian-Wu He,,Yan Zhao,Ling Guo,Jun Shang,Xing-Bin Yang 한국식품영양과학회 2012 Journal of medicinal food Vol.15 No.4

Dietary and medicinal uses of Panax notoginseng have been associated with reduced risk of cancer. This study was designed to investigate the profiles of P. notoginseng saponin extract (PNSE), the major bioactive ingredients in P. notoginseng (Burk.) F.H. Chen, by high-performance liquid chromatography, and, for the first time, the anticancer effect of PNSE in the human colon cancer cell line LoVo was further evaluated. The major saponins present in PNSE were ginsenosides Rg1 (31.1%) and Rb1 (34.4%), and the total content of the eight saponins identified (notoginsenoside R1, ginsenosides Rg1, Re, Rb1, Rc, and Rd, and isomeric ginsenosides Rb2 and Rb3) was 81.7%, indicating that it was a highly purified standardized saponin extract. Furthermore, PNSE was found to have a markedly cytotoxic effect and antiproliferative activity against the LoVo cell line in a dose- and time-dependent manner. Flow cytometry analysis demonstrated that PNSE caused cell cycle arrest at S phase. Moreover, PNSE was found to possess antioxidative capacities in the 1,1-diphenyl-2-picrylhydrazyl free radical scavenging assay and hydroxyl radical scavenging assay in vitro. Taken together, the present results suggest that naturally occurring PNSE may provide significant natural defense against human colon cancer.

Flame Braze between Aluminum Alloy 5A06 and Low Carbon Steel Q235

Nian-chun LU,Yang LIU,Guo-dong Hao,Yun-tao WANG 대한용접·접합학회 2017 대한용접·접합학회지 Vol.35 No.4

By means of the flame braze, the welding problems on Aluminum alloy(5A06)and low carbon steel Q235) were mainly researched in this paper. The welding technology adopted in this paper is that a hot-dipped Aluminum coating of ZL102 Aluminum alloy was firstly performed on the surfaces of low carbon steel, then the layer of hot-dipped aluminum and aluminum alloy were welded by the shape of the lap joint. Through the analysis of the microstructure and tensile property of welded joint after the experiment, the experimental results expressed that good welded joint can be attained by application of flame brazing. Fracture location of the joint specimens appears in the coating layer by means of tensile test. The results show that the bond strength of the coating layer was less than that of the brazing seams.

Coordinated Control of DFIG System based on Repetitive Control Strategy under Generalized Harmonic Grid Voltages

Nian, Heng,Cheng, Chenwen,Song, Yipeng The Korean Institute of Power Electronics 2017 JOURNAL OF POWER ELECTRONICS Vol.17 No.3

This paper develops a coordinated control strategy of the doubly fed induction generator (DFIG) system based on repetitive control (RC) under generalized harmonic grid voltage conditions. The proposed RC strategy in the rotor side converter (RSC) is capable of ensuring smooth DFIG electromagnetic torque that will enable the possible safe functioning of the mechanical components, such as gear box and bearing. Moreover, the proposed RC strategy in the grid side converter (GSC) aims to achieve sinusoidal overall currents of the DFIG system injected into the network to guarantee satisfactory power quality. The dc-link voltage fluctuation under the proposed control target is theoretically analyzed. Influence of limited converter capacity on the controllable area has also been studied. A laboratory test platform has been constructed, and the experimental results validate the availability of the proposed RC strategy for the DFIG system under generalized harmonic grid voltage conditions.

Research on the Technology of Disaster Prevention and Rescue in High-altitude Super-long Railway Tunnel

Nian Zhang,Zhongsheng Tan,Minjie Jin 대한토목학회 2015 KSCE Journal of Civil Engineering Vol.19 No.3

By taking the 32.645-kilometer-long Guanjiao tunnel of Qinghai-Tibet railway as the object of research, the technology of disasterprevention and rescue in the high-altitude super-long railway tunnel was studied. Combined methods of fire model test and numericalsimulation, combustion characteristics in the high-altitude super-long railway tunnel were discussed, and the Available SafetyEvacuation Time (ASET) was obtained. From the viewpoint of people's safety evacuation, software called STEPS was used toestablish the personnel evacuation model aimed to simulate the process of the personnel evacuation and analyze the evacuation timeunder different fire scenes at the emergency station. Setting schemes of the emergency station and the cross-passage of Guanjiaosuper-long railway tunnel were determined preliminarily, and it also provided a basis for optimizing the design of safety evacuationfacilities of the super-long railway tunnel.

Chromatographic biopanning for the selection of peptides with high specificity to Pb²⁺ from phage displayed peptide library

Nian, Rui,Kim, Duck Sang,Nguyen, Thuong,Tan, Lihan,Kim, Chan-Wha,Yoo, Ik-Keun,Choe, Woo-Seok Elsevier 2010 Journal of chromatography Vol.1217 No.38

<P><B>Abstract</B></P><P>Toxic heavy metal pollution is a global problem occurring in air, soil as well as water. There is a need for a more cost effective, renewable remediation technique, but most importantly, for a recovery method that is selective for one specific metal of concern. Phage display technology has been used as a powerful tool in the discovery of peptides capable of exhibiting specific affinity to various metals or metal ions. However, traditional phage display is mainly conducted in batch mode, resulting in only one equilibrium state hence low-efficiency selection. It is also unable to monitor the selection process in real time mode. In this study, phage display technique was incorporated with chromatography procedure with the use of a monolithic column, facilitating multiple phage-binding equilibrium states and online monitoring of the selection process in search of affinity peptides to Pb<SUP>2+</SUP>. In total, 17 candidate peptides were found and their specificity toward Pb<SUP>2+</SUP> was further investigated with bead-based enzyme immunoassay (EIA). A highly specific Pb<SUP>2+</SUP> binding peptide ThrAsnThrLeuSerAsnAsn (TNTLSNN) was obtained. Based on our knowledge, this is the first report on a new chromatographic biopanning method coupled with monolithic column for the selection of metal ion specific binding peptides. It is expected that this monolith-based chromatographic biopanning will provide a promising approach for a high throughput screening of affinity peptides cognitive of a wide range of target species.</P>

Effect of Xylanase Supplementation on the Net Energy for Production, Performance and Gut Microflora of Broilers Fed Corn/Soy-based Diet

Nian, F.,Guo, Y.M.,Ru, Y.J.,Peron, A.,Li, F.D. Asian Australasian Association of Animal Productio 2011 Animal Bioscience Vol.24 No.9

The objective of this study was to assess the effect of xylanase on net energy for production, performance, nutrient digestion and gut microflora of broilers fed corn/soy-based diet. Eighty-four day-old male broiler chicks were allocated to two groups receiving two treatments, respectively. Each treatment had six replicate cages with seven broilers per cage. The diets were based on corn and soybean. The treatments were: i) basal diet reduced in apparent metabolizable energy (-0.63 MJ/kg compared to commercial diet specifications); ii) basal diet supplemented xylanase at 4,000 u/kg feed. The experiment used the auto-control, open circuit respiration calorimetry apparatus to examine the heat production and net energy for production. The results revealed that xylanase supplementation did not affect growth performance and diet AME value, but increased $NE_p$ value by 18.2% (p<0.05) and decreased daily heat production per $kg^{0.75}$ by 31.7% (p<0.05). There was no effect (p>0.05) of xylanase supplementation on the ileal digestibility of N and hemicelluloses, but the ileum digestibility of energy was increased by 2% by xylanase supplementation (p<0.05). Xylanase supplementation increased (p<0.05) the count of lactobacillus and bifidobacterial in the caecum.

Effect of Exogenous Xylanase Supplementation on the Performance, Net Energy and Gut Microflora of Broiler Chickens Fed Wheat-based Diets

Nian, F.,Guo, Y.M.,Ru, Y.J.,Li, F.D.,Peron, A. Asian Australasian Association of Animal Productio 2011 Animal Bioscience Vol.24 No.3

An experiment was carried out to assess the effects of xylanase supplementation on the performance, net energy and gut microflora of broilers fed a wheat-based diet. Day-old male broiler chicks were allocated to two dietary treatments. Each treatment was composed of six replicate cages of seven broilers per cage. The diets were wheat-based and offered as mash. The treatments included i) basal diet deficient in metabolizable energy; and ii) basal diet supplemented with a commercial xylanase added at 4,000 U/kg feed. Bird performance, nutrient utilization and gut microbial populations were measured. Heat production and net energy were determined using an auto-control, open circuit respiration calorimetry apparatus. Results showed that exogenous xylanase supplementation improved feed conversion efficiency (p<0.05) and increased diet AME (+4.2%; p<0.05), as well as heat production (HP), net energy for production (NEp), production of $CO_2$, and consumption of $O_2$. The respiratory quotient (RQ) was also increased (p<0.01) by the addition of xylanase. NEp value was increased by 26.1% while daily heat production per kg metabolizable body weight was decreased by 26.2% when the xylanase was added. Xylanase supplementation numerically increased the ileal digestibility of protein and energy by 3 and 6 percentage units respectively (p>0.05). The ileal digestibility of hemicellulose was significantly improved by xylanase addition (p<0.05).

Solar-driven H₂ Evolution from Photo-reforming of Biomass with Colloidal Quantum Dots

Nian fang Wang,이도창 한국고분자학회 2020 한국고분자학회 학술대회 연구논문 초록집 Vol.45 No.2