http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 김정일(Jeong Ill Kim) (검색결과 6 건)
- 무료
- 기관 내 무료
- 유료
-
金正日 大田大學校 1990 論文集 Vol.9 No.2
Score test is a test method that is derived from likelihood ratio test by applying the asymptotic properties of score function and Fisher information. So this test can be applied to the model that is twice differenciable with respect to the parameter. In the likelihood ratio test, we need to calculate the maximum likelihood estimator under the alternative hypothesis as well as under the null hypothesis. Hence test procedure becomes more complicated if the model includes many nuisance paramters. But in the score test, we need to concern with finding the m.l.e of nuisance parameters restricted to the hypothesis only. This paper have applied score test for testing parameter of a regressing model, and compared it to the ANOVA.
-
金正一 木浦海洋大學校 1999 論文集 Vol.7 No.1
The purpose of this study is to investigate the wettability of molten insert metal. Contact angle is changed according to the temperature and composition of molten insert metal. Molten insert metal(solder) of eutectic composition gave both properties of a good wetting and spreading. The flow of molten insert metal in contact with solid surface (base metal surface) is controlled by factors such as the wetting between insert metal and base metal, the density and viscosity of molten insert metal.
-
A 1050 알루미늄과 SS41 軟鋼과의 브레이징 接合에 關한 硏究
金正一 木浦海洋大學校 1995 論文集 Vol.3 No.1
The Purpose of this study is to investigate the effect of Ni plating layer thickness and lap ratio on the bonding strength of the brazed bonding of Al/SS41. The brazing was performed under different bonding conditions such as Ni plating thickness and lap ratio. The bonding strength was evaluated by tensile tester and micro-structural analysis at the interlayer was performed by SEM. In order to improve the bonding strength, the metallic plating of Ni on the SS41 surface was used. Using the metallic plating of Ni on the SS41 surface, the wettability between filler metal and base metal was improved, therefore bonding strength was increased. An optimum lap ratio obtained through the experimental results was 3.0 in case of 10㎛ Ni plating thickness.
-
-
박경배,임경묵,강경인,김정일,정근원,이광배,김현욱 명지대학교 대학원 1997 대학원논문집 Vol.1 No.-
As recently the need for electronic commerce and infra information system using Internet increases, several organizations have attempted to develop mutual authentication mechanism between Certification Authorities(CA's) as well as fundamental authentication mechanism, based on Public-key. In this paper, we propose a new efficient authentication protocol which is applicable to various servers. For the protocol, we complement Public-key certificate structure and authentication protocol defined in X.509 with self-arithmetic function and data security function of 1C card.
-
冠岳樹木園 所藏標本을 中心으로 한 國內 木本 植物의 分布地와 識別에 대해서 (Ⅲ) : Betulaceae 자작나무科에 대해서
金正壹,金輝,張珍成 서울大學校 農業生命科學大學 附屬樹木園 1997 서울大學校 樹木園 硏究報告 Vol.- No.17
국내 자작나무과중 자생하는 5속에 대한 식별학적 문제점과 분포에 대해 연구하였다. 자작나무속의 대부분의 정량 형질은 연속 변이를 보여 뚜렷한 종간의 형질 차이를 확인하는 데는 어려움이 있으나 잎의 선점의 유무, 수피의 색깔, 관목/교목류 등의 정성 형질과 각 種間의 정량 형질의 조합하였을 경우 쉽게 식별이 가능하였다. 서어나무속은 엽맥수, 포의 톱니모양, 잎의 모양, 털의 유무 등 기존에 알려져 있는 정량, 정성형질로 쉽게 식별이 가능하였으며 현재까지 알려진 많은 변종은 관련종과 연속변이를 보여 대부분 이명처리를 하였고 특히, Carpinus coreana Nakai(소사나무)는 C. truczaninovii Hance(산서어나무)로 이명처리를 하였다. 그러나, C. tschonoskill var. brevicalycina Nakai(당개서어나무)와 C. laxiflora var. longispica Uyeki(긴서어나무)는 변종으로 인정된다. 개암나무속중 개암나무[Corylus heterophylla var. thunbergii (Hort. ex K. Koch) Blume]는 난티잎개암나무(C. heterophylla Fischer ex Traut.)의 변이와 연속변이를 보여 이명으로 처리하였고, C. sieboldiana brevicalycina Blume var. sieboldii (참개암나무)는 분포면에 있어서도 C. sieboldiana var. mandshurica (Maxim.) C. Scheider(물개암나무)와 차이가 있다. 오리나무속중 A. hirsuta (Spach) Trucz. ex Ruprecht(물오리나무)와 Alnus hirsuta var. sibirica Schneider(물갬나무)의 차이를 발견할 수 없어 본 연구에서는 물갬나무를 물오리나무에 포함시켰다. 그러나, 대부분 자작나무과의 식물이 러시아와 중국북부, 일본 북부에 분포하는 종으로서 이에 대한 변이조사가 이루워져야 비로서 정확한 종처리가 가능하리라 생각된다. 한편, 자작나무과에 속하는 대부분 종이 전국적으로 분포하나, 서어나무속중 개서어나무는 전북 대둔산 이남, 산서어나무는 서남해안과 도서지방, 강원도 정선과 삼척 지방에도 분포하며 새우나무는 남부도서와 제주도에 분포하는 것으로 밝혀졌다. To clarify the taxonomy of five genera of Betulaceae, herbarium specimens collected form South Korea past forty years were compared on the basis of leaf and fruit morpholgy. A multivariate morphometric study of Corylus and Alnus was undertaken to assess the numbers and ranks of taxa that usefully could be recognized. The qualitative and quantitative differences among Betula taxa were larger and indicated that five species could be easily recognized. The current study, together with earlier studies, justified varietal status for several taxa, such as Corylus sieboldiana var. mandshurica C. Schneider, Carpinus tschonoskii var. brevicalycina Nakai and C. laxiflora var. longispica Uyeki. However, A. hirsuta (Spach) Turcz. ex Ruprecht was indistinguishable from A. sibirica (Fischer ex Spach) Komarov on the basis of leaf and fruit morphology. Using a key to the taxa produced from all results, the distributions of most taxa were determined from a limited sample of herbarium specimens and nomenclatural problems were reviewed. The relationships of several taxa, such as Alnus fruticosa complex, A. hirsuta complex, and Corylus sieboldiana complex to one another and to the northern populations of them were as yet unclear, and therefore recognition of these taxa would be premature.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
