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박수봉,박종안,Park, Soo-Bong,Park, Jong-An 한국음향학회 1995 韓國音響學會誌 Vol.14 No.1
본 논문에서는 신경망 학습에 의한 영상분류 알고리즘을 개선하였으며, 이것은 입력패턴 생성부와 분류을 위한 역전파 알고리즘에 의한 광역신경망으로 구성된다. 입력패턴을 위한 특징값으로는 자기조직화 형상지도 학습에 의해 얻은 코드북 데이타를 특징벡터로 이용한다. 이것은 입력벡터로서 원영상에 충실하면서 입력 뉴런수를 감소시킨다. 분류기에 사용된 광역망 알고리즘은 가중치와 유니트 오프셋 제어가 가능하도록 역전파 알고리즘에 제어부와 어드레스 메모리부를 삽입하였다. 실험결과 이들 분류기는 학습시 국소최소점에 빠지지 않게 되며, 대규모 신경망을 구현하고자 할 때 망구조를 간단히 할 수 있다. 또한 이것은 동작속도를 크게 개선할 수 있다. In this paper, we improve an image classifier algorithm based on neural network learning. It consists of two steps. The first is input pattern generation and the second, the global neural network implementation using an improved back-propagation algorithm. The feature vector for pattern recognition consists of the codebook data obtained from self-organization feature map learning. It decreases the input neuron number as well as the computational cost. The global neural network algorithm which is used in classifier inserts a control part and an address memory part to the back-propagation algorithm to control weights and unit-offsets. The simulation results show that it does not fall into the local minima and can implement easily the large-scale neural network. And it decreases largely the learning time.
모형실험과 시뮬레이션을 통한 활어 이송용 예인 가두리의수직 및 수평 전개력 추정
박수봉 ( Subong Park ),이춘우 ( Chun Woo Lee ) 한국어업기술학회 2014 수산해양기술연구 Vol.50 No.2
Nowadays, consumption of fisheries products is increasing. There are several factors, one of which is a quantitative development through aquaculture. Another factor is an increase qualitative consumption of fish which require that fish be supplied alive. This requires a lot of technical effort to transport the live fish that have low survival rate(c.f. tuna and mackerel) in coastal waters and in the open sea. To develop a towing cage for transporting the live fish, model test in a circulate water channel and simulation by computer tool were carried out. In order to spread vertically, floats were attached at the upper part of the cage, and iron chains attached at the lower part of the cage. For horizontal spreading, kites were attached on the cage. The tension and spreading performance of the cage were measured. The result shows that the tension and reduction ratio of inside volume of the cage were tended to increase with increased towing speeds. The suitable operation condition in towing cage was 1.0 m/s towing speeds with vertical spreading force 8.7 kN, horizontal spreading force 5.6 kN; in this case the reduction ratio of inside volume of the cage was estimated as 25%.
돼지 난포란의 성숙과 수정에 대한 성숙배지에 첨가된 난포액의 영향
박수봉,박항균,입곡명 ( S . B . Park,H . K . Park,Akira Iritani ) 한국축산학회 1990 한국축산학회지 Vol.32 No.2
The purpose of these experiments were to investigate the effect of follicular fluid supplemented to maturation medium on the maturation and fertilization of porcine follicular oocytes. The results obtained were as follows. In the media with MFF and LFF, the rates of maturation division of porcine oocytes in vitro were 82% and 80%, respectively, and the proportion of oocytes matured to metaphase Ⅱ become nearly constant after 39h of culture. However, the rates of maturation of porcine oocytes in medium with FCS 10% were 60% and 79% at 39 and 42h, respectively. The fertilization rate of oocyte cultured in the medium with FCS 10% is 99%. When the oocytes matured in medium with MFF and LFF were fertilized, fertilization rates were 42% and 54,%, respectively. The male pronucleus formation rates of oocytes cultured in the media with FCS 10% MFF 10% and LFF 10% concentrations were 54, 74 and 84%, respectively and were increased through culture in media supplemented with follicular fluid. The present results clearly demonstrate that follicular fluid promoted the maturation of oocytes and male pronucleus formation.
박수봉(Soo Bong Park) 한국안광학회 1998 한국안광학회지 Vol.3 No.1
The purpose of this study was to compare the right and left eye size, distance between two eyes, interpupillary distance on growth stage aging changes in Korean. The author divided into 5 groups according to subject`s age(group A : 7 ∼ 12 years, group B : 13 ∼15 years, group C : 16 ∼ 18 years, group D : 19-24 years, group E : 25 ∼ 30 years). The high values of inter outer canthal distance(T) and distance between two eyes(G) were 94.30 mm, 36.66 mm at group B respectively. The ratio of identical eye size was about 10.0% in A, B, C group but 22.7% in E group. P[ T-(right eye size + left eye size) / 2 ] was wider than IPD. Data showed that the difference was 5.72 mm in group B and 1.13 mm in group E. The reason for this is that the pupils are displaced nasally from the center of the limbal ring. This has significant meaning in ophthalmic procedures.