Endpoint Confirmation and Timing Image Digital Processing for Competitive Athletics

Shi Qian,Qin Weifeng,Xu Zhubo 한국컴퓨터산업협회 2023 Human-centric Computing and Information Sciences Vol.13 No.-

In athletics of the past, the confirmation of athletes' performance through manual timing can no longer meet the requirements, and electronic camera technology must be used. At present, the use of existing domestic image acquisition and scoring interpretation systems to determine the interpretation speed has great limitations. This paper aims at the current situation of competitive athletics, and proposes a method of digitally confirming the end of the game and processing the timing image in order to achieve a more accurate timing and end positioning. This article first analyzes the method of competition confirmation in domestic competitive athletics competitions, studies and analyzes the current image acquisition and performance interpretation system deficiencies, and proposes a more accurate endpoint confirmation and timing method. Existing binarization methods can handle many images well. However, due to the use of a unified threshold as the standard for dividing all pixels in the global scope or local area, the traditional global and local binarization methods are processing. For low-contrast images, part of the detailed information of the target object is often lost, and satisfactory processing results cannot be obtained. In order to solve the problem of target extraction in low-contrast images, machine learning (ML) is used. Based on previous research, in order to improve image acquisition and performance. For the interpretation speed & accuracy, using charge-coupled device (CCD) to obtain images, and conducting in-depth research, the purpose is to use DSP digital image processing technology through the acquisition of images and the main control computer to realize the determination of the results of the game. Experimental results show that linear CCD is used in track & field meets and can effectively collect images to confirm the results of the competition, while the interpretation error is about 6%. Subsequent sports competitions can be improved by some methods. In competitive athletic competitions, the confirmation of sports performance couldn’t meet the requirements by manual timing in the past. According to the regulations of the International Amateur Athletic Federation (IAAF), electric finish timing systems are required for major sports competitions. At present, the domestic development level is still stuck in black and white image assessments. At this level, this article applies the high-speed color linear CCD technology to the electric timing system at the end of the track, and analyzes the various factors that affect the image quality in post-processing of the color image acquisition, which has great significance to improve the efficiency of athletics and sports competitions.

Distribution Characteristic and Assessment of Soil Organic Matter, Nitrogen and Phosphorus in Soils of New born River Mouth Wetlands

Chen, Weifeng,Ann, Seoung-Won,Shi, Yanxi,Mi, QingHua 한국환경과학회 2003 한국환경과학회지 Vol.12 No.2

The paper investigates preliminarily spatial distribution soil organic matter (SOM), nitrogen (N) and phosphorus (O) and its environmental influence in wetland soil of different vegetation landscape in the Yellow River Mouth. The result shows the SOM and total nitrogen (TN), efficient N, efficient P in top later soils of different vegetation district have signficantly different content, The SOM is show as Calamagrostis epigeios wetlands >Phragmites cmmunis wetlands >Tamarix chinensi wetlands above tidal >Suaeda salsa wetlands in high tidal >Tamarix chinensi wetlands in high tidal >tidal flats, the arrange of the TN and efficient N content is the same except that the content in Suaeda salsa wetlands in high tidal is heavier than Tamarix chinensi wetlands in high tidal. In different vegetation landscape wetland types the vertical change of soil nutrients are obvious except for P, gradually decrease from the upper to the lower. This case reflects the function of the vegetation on the wetland development of soil, and proves the wetland soil has the characteristic of new born and bad degree of development, SOM, TM, efficient N and efficient P content in wetland soils have significantly positive correlation, but TP have no correlation with them but efficient P. The contents of TN in wetland soils range from 58∼1480㎎/㎏, total average content 408 ㎎/㎏, average content of above 30 cm is 625 ㎎/㎏. The range of TP content in the soil is 372∼1042㎎/㎏, total average is 569 ㎎/㎏, average content of above 20 cm is 611㎎/㎏. According the P it occurs mainly as calcium phosphates, and the validity is lower, therefore, N and P in the new born wetlands cannot produce serious impact on the environments at present.

Influence of the River Ceasing on Wetland Environment in the Yellow River Delta

Chen, Weifeng,Shi, Yanxi,Mi, Qinghua,Ann, Seoung-Won 한국환경과학회 2003 한국환경과학회지 Vol.12 No.2

The yellow River delta is an important region where coastal and newly formed wetlands distribute in north Chine. Based on satellite remote sensing images and GIS thchniques, this paper tends to delineate the dynamic changes of newly formed wetland in the Yellow River mouth from 1986.5 To 1996.10. Our results show that the newly formed wetland increased by 24.9 ㎢ per year. Before 1990.1 and it decreased by 2.40 ㎢ per year after that. The northern and southwestern parts of the Yellow River mouth are main positions of decrease and the southern and the estuary parts are main positions of increase. The advancing rate of river mouth extending into the Bo Sea is decreasing obviously. The reason for that is the decreasing of water and sediments in the Yellow River, Which caused by the increasing use of water and soil conservation on upper reath.

ILBA: An Improved Bat Algorithm with Inertia Weight Factor and Lévy Flight

Ma weifeng,Shi Hao,Sun Xiaoyong 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.10

Aiming at such shortcomings of traditional Bat algorithm as low precision convergence, premature convergence, slow convergence, an improved BA based on inertia weight factor and Lévy flight (ILBA) has been proposed, which has made two modifications on update equations of bat flying position in BA, using inertia weight factor to keep the flight inertia of bat individual, adaptively adjust the exploitation mechanism of the algorithm in different iteration periods, make the algorithm achieve better convergence precision and altering the strategy about position update of bats from Brownian random walks into Lévy flights strategy to effectively avoid local optimism of the algorithm and guarantee its exploration mechanism while taking advantage of heavy-tailed effect of Lévy flight to speed up the convergence. By means of 4 typical test functions simulation, the results show that ILBA boasts faster convergence and superior optimal performance compared to traditional BA and LBA.

Temporal and Spatial Change in Microbial Diversity in New-developed Wetland Soil Covered by Tamarix chinesis Community in Chinese Yellow River Delta

Chen, WeiFeng,Ann, Seoung-Won,Kim, Hong-Nam,Shi, Yanxi,Mi, Qinghua 한국환경과학회 2005 한국환경과학회지 Vol.14 No.4

Soil samples were collected from new-developed wetland soil ecosystem of Tamarix chinesis plantation in Chinese Yellow River Delta in different months of 2003. Soil characteristics, temporal change and spatial distribution of microbial community composition and their relationship with nitrogen turnover and circling were investigated in order to analyze and characterize the role of microbial diversity and functioning in the specific soil ecosystem. The result showed that the total population of microbial community in the studied soil was considerably low, compared with common natural ecosystem. The amount of microorganism followed as the order: bacteria> actinomycetes>fungi. Amount of actinomycetes were higher by far than that of fungi. Microbial population remarkably varied in different months. Microbial population of three species in top horizon was corrected to that in deep horizon. Obvious rhizosphere effect was observed and microbial population was significantly higher in rhizosphere than other soils due to vegetation growth, root exudation, and cumulative dead fine roots. Our results demonstrate that microbial diversity is low, while is dominated by specific community in the wetland ecosystem of Tamarix chinesi.

The Extraction of Feature Signal of All-electric Ship Electric Power System Based on Wavelet Analysis

Bao Yan,Shi Weifeng,Zhou Zuohan 보안공학연구지원센터(IJSIP) 2013 International Journal of Signal Processing, Image Vol.6 No.5

Dynamic Changes of Newly formed Wetlands in the Yellow River Mouth Based on GIS and Remote Sensing

Zhao, Gengxing,Shi, Yanxi,Chen, Weifeng,Li, Jing,Ann, Seoung-won,Kim, Young-chil,Jung, Jea-hoon,Chae, Soo-cheon 한국환경과학회 2003 한국환경과학회지 Vol.12 No.2

The Yellow River delta is an important region where coastal and newly formed wetlands distribute in north China. Based on satellite remote sensing images and GIS techniques, This paper tends to delineate the dynamic changes of newly formed wetland in the Yellow River mouth from 1986.5 to 1996.10. Our results show that the newly formed wetland increased by 24.9 ㎢ per year after that. The northern and southwestern parts of the Yellow River mouth are main positions of decrease and the southern and the estuary parts are main positions of increase. The advancing rate of river and mouth extending into the Bo Sea is decreasing obviously. The reason for that is the decreasing of water and sediments in the Yellow River, which caused by the increasing use of water and soil conservation on upper reach.

Research on the Application of WPT-EEMD Method in the Fault Diagnosis of AESPS

Bao Yan,Shi Weifeng,Chen Peichen,Ding Qiuyi,Zhu Chen 보안공학연구지원센터 2014 International Journal of Control and Automation Vol.7 No.8

Novel reassortant 2.3.4.4B H5N6 highly pathogenic avian influenza viruses circulating among wild, domestic birds in Xinjiang, Northwest China

Qian Zhang,Xindi Mei,Cheng Zhang,Juan Li,Nana Chang,Dilihuma Aji,Weifeng Shi,Yuhai Bi,Zhenghai Ma 대한수의학회 2021 Journal of Veterinary Science Vol.22 No.4

Background: The H5 avian influenza viruses (AIVs) of clade 2.3.4.4 circulate in wild and domestic birds worldwide. In 2017, nine strains of H5N6 AIVs were isolated from aquatic poultry in Xinjiang, Northwest China. Objectives: This study aimed to analyze the origin, reassortment, and mutations of the AIV isolates. Methods: AIVs were isolated from oropharyngeal and cloacal swabs of poultry. Identification was accomplished by inoculating isolates into embryonated chicken eggs and performing hemagglutination tests and reverse transcription polymerase chain reaction (RT-PCR). The viral genomes were amplified with RT-PCR and then sequenced. The sequence alignment, phylogenetic, and molecular characteristic analyses were performed by using bioinformatic software. Results: Nine isolates originated from the same ancestor. The viral HA gene belonged to clade 2.3.4.4B, while the NA gene had a close phylogenetic relationship with the 2.3.4.4C H5N6 highly pathogenic avian influenza viruses (HPAIVs) isolated from shoveler ducks in Ningxia in 2015. The NP gene was grouped into an independent subcluster within the 2.3.4.4B H5N8 AIVs, and the remaining six genes all had close phylogenetic relationships with the 2.3.4.4B H5N8 HPAIVs isolated from the wild birds in China, Egypt, Uganda, Cameroon, and India in 2016–2017, Multiple basic amino acid residues associated with HPAIVs were located adjacent to the cleavage site of the HA protein. The nine isolates comprised reassortant 2.3.4.4B HPAIVs originating from 2.3.4.4B H5N8 and 2.3.4.4C H5N6 viruses in wild birds. Conclusions: These results suggest that the Northern Tianshan Mountain wetlands in Xinjiang may have a key role in AIVs disseminating from Central China to the Eurasian continent and East African.