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A Novel Flame Edge Detection Algorithm via a Novel Active Contour Model
Wanli Feng,Ying Li,Shangbing Gao,Yunyang Yan,Jianxun Xue 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.9
Flame edge detection from color images is a challenging research area recently. In this paper, an extension of active contour model is proposed by adding the two information types to both internal and external energy terms. Therefore, the combination of these two forces allows for flexible initialization of the contours. This energy is then incorporated into a level set formulation with a level set regularization term that is necessary for accurate computation in the corresponding level set method. Edge extraction of different flame images using C-V model and the classical edge detection operators are compared and analyzed. Experimental results show that the existing methods do not emphasize the continuity and clarity of the flame and fire edges while the proposed method identifies the continuous and clear edges of the flame fire.
Research of Theme Statement Extraction for Chinese Literature Based on Lexical Chain
WanLi Feng 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.6
The paper proposes an extraction approach for short Chinese documents topic sentences based on lexical chains and context technology, with which narrative clues of documents are found out first. Multiple lexical chains are constructed subsequently before the extraction of a topic-information-rich one as the keyword sequence of topic sentences. Experimental results demonstrate that this approach covers information of documents to the greater extent, and that it avoids possible repetitive expression that is caused by different keyword sequences in expressing the same topic sentences. Therefore, it achieves an obviously better effect than the statistic approach.
Object tracking based on adaptive updating of a spatial-temporal context model
( Wanli Feng ),( Yigang Cen ),( Xianyou Zeng ),( Zhetao Li ),( Ming Zeng ),( Viacheslav Voronin ) 한국인터넷정보학회 2017 KSII Transactions on Internet and Information Syst Vol.11 No.11
Recently, a tracking algorithm called the spatial-temporal context model has been proposed to locate a target by using the contextual information around the target. This model has achieved excellent results when the target undergoes slight occlusion and appearance changes. However, the target location in the current frame is based on the location in the previous frame, which will lead to failure in the presence of fast motion because of the lack of a prediction mechanism. In addition, the spatial context model is updated frame by frame, which will undoubtedly result in drift once the target is occluded continuously. This paper proposes two improvements to solve the above two problems: First, four possible positions of the target in the current frame are predicted based on the displacement between the previous two frames, and then, we calculate four confidence maps at these four positions; the target position is located at the position that corresponds to the maximum value. Second, we propose a target reliability criterion and design an adaptive threshold to regulate the updating speed of the model. Specifically, we stop updating the model when the reliability is lower than the threshold. Experimental results show that the proposed algorithm achieves better tracking results than traditional STC and other algorithms.
Feng Ding,Lei Lv,Jian Pan,Xiangkui Wan,Xue-Bo Jin 제어·로봇·시스템학회 2020 International Journal of Control, Automation, and Vol.18 No.4
This paper considers the parameter identification problems of controlled autoregressive systems using observation information. According to the hierarchical identification principle, we decompose the controlled autoregressive system into two subsystems by introducing two fictitious output variables. Then a two-stage gradientbased iterative algorithm is proposed by means of the iterative technique. In order to improve the performance of the tracking the time-varying parameters, we derive a two-stage multi-innovation gradient-based iterative algorithm based on the multi-innovation identification theory. Finally, an example is provided to illustrate the effectiveness of the proposed algorithms.
Feng Huang,Ban Zhang,Xingchen Liu,Jinyang Xiang,Guoqing Wan,Miaodi Qu 한국강구조학회 2022 International Journal of Steel Structures Vol.22 No.1
The primary error sources of engineering design for bolted beam reaction system with large size are mainly from the deformation of structure, mechanical behavior of connection joints. In addition, the simplifi ed calculation method of bolted connection has not formed a unifi ed understanding. A vertical static load test was carried out in the laboratory, and the deformation laws of the reaction beam were analyzed to obtain the mechanical characteristics of the connection joints by controlling the defl ection of the reaction beam. The composite eff ect coeffi cient k l of the variable section panel structure was introduced to the theoretical solution of the defl ection of the variable cross-section beam. Simultaneously, the fi nite element method was employed to establish the detailed model of the beam reaction system. The mechanical behavior of the reaction beam and the bolted joint are extensively studied, and the simplifi ed method of bolted joint is improved. The bolted connection is simplifi ed as a semi-rigid joint, and then the theoretical formula is proposed to calculate the defl ection and deformation of the beam structure under bolted connection. The defl ection and deformation of the reaction beam by the test and theoretical formula are consistent. The results show that the theoretical formula can well calculate the defl ection and deformation of structure members under bolted connection.
자연산과 양식산 해삼(Apostichopus japonicus)의 지방산 조성 비교
( Feng Jin ),( Anisuzzaman Md ),정우철 ( U Cheol Jeong ),최종국 ( Jong Kuk Choi ),유학선 ( Hak Sun Yu ),강승완 ( Seung Wan Kang ),강석중 ( Seok Joong Kang ) 한국수산과학회(구 한국수산학회) 2016 한국수산과학회지 Vol.49 No.4
This study compared the fatty acid composition of wild and cultured specimens of the sea cucumber Apostichopus japonicus. We extracted total lipids from the specimens and determined their fatty acid compositions through capillary gas chromatography, resulting in the identification of 53 fatty acids. We found that wild sea cucumbers were rich in palmitoleic (C16:1n-7) and eicosapentaenoic acid (C20:5n-3), whereas cultured specimens were rich in eicosenoic (C20:1n-9) and arachidonic acid (C20:4n-6). In both types of sea cucumbers, the highest percentage of polyunsaturated fatty acids (PUFA) consisted of polar lipids (PL), followed by total lipids (TL) and neutral lipids (NL). Cultured sea cucumbers contained a higher percentage of total lipids (TL) than wild sea cucumbers did, whereas there was no significant difference between the two groups in the percentages of neutral (NL) and polar lipids (PL).
Feng Ming Zou,이광식,Hu Wan,Zhong Zheng Gui,진병래 한국응용곤충학회 2014 Journal of Asia-Pacific Entomology Vol.17 No.1
Insect growth-blocking peptides (GBPs) exhibit growth-blocking and paralytic activity. Low concentrations ofGBP stimulate larval growth, whereas high concentrations of GBP significantly retard larval growth. Here, weshow that morphological abnormalities and lethality were induced in silkworm (Bombyx mori) larvae by highconcentrations of GBP. Active B. mori GBP (BmGBP) was produced by treating recombinant proBmGBP(expressed in baculovirus-infected insect cells) with bovine factor Xa. When silkworm larvae on day 1 of thefifth-instar stage were injected between the seventh and eight abdominal segments with BmGBP (100 or500 ng/larva), the larval–pupal and pupal–adult transformations of these silkworms were delayed in a dosedependentmanner. However, a high concentration (2000 ng/larva) of BmGBP or Spodoptera exigua GBP(SeGBP) acutely induced morphological abnormalities and death in silkworm larvae. In silkwormlarvae treatedwith high concentrations of GBPs, the ingested food excessively accumulated in the foregut, which caused extremeswelling in both the thorax and the foregut and resulted in larval death. Therefore, these results notonly provide insight into the effect of insect GBPs on gut physiology but also reveal a novel function of insectGBPs.
Does Spore Count Matter in Fungal Allergy?: The Role of Allergenic Fungal Species
Wan-Rou Lin,Yi-Hsing Chen,Mey-Fann Lee,Ling-Yi Hsu,Chih-Jen Tien,Feng-Ming Shih,Shih-Ching Hsiao,Pi-Han Wang 대한천식알레르기학회 2016 Allergy, Asthma & Immunology Research Vol.8 No.5
Purpose: Fungi have been known to be important aeroallergens for hundreds of years. Most studies have focused on total fungal concentration; however, the concentration of specific allergenic fungi may be more important on an individual basis. Methods: Ten fungal allergic patients and 2 non-fungal allergic patients were enrolled. The patients with a decrease in physician or patient global assessment by more than 50% of their personal best were considered to have an exacerbation of allergic symptoms and to be in the active stage. Those who maintained their physician and patient global assessment scores at their personal best for more than 3 months were considered to be in the inactive stage. The concentrations of dominant fungi in the patients’ houses and outdoors were measured by direct and viable counts at active and inactive stages. Results: The exacerbation of allergic symptoms was not correlated with total fungal spore concentration or the indoor/outdoor ratio (I/O). Specific fungi, such as Cladosporium oxysporum (C. oxyspurum), C. cladosporioides, and Aspergillus niger (A. niger), were found to be significantly higher concentrations in the active stage than in the inactive stage. Presumed allergenic spore concentration threshold levels were 100 CFU/m3 for C. oxysporum, and 10 CFU/m3 for A. niger, Penicillium brevicompactum and Penicillium oxalicum. Conclusions: The major factor causing exacerbation of allergic symptoms in established fungal allergic patients may be the spore concentration of specific allergenic fungi rather than the total fungal concentration. These results may be useful in making recommendations as regards environmental control for fungal allergic patients.