• Title, Summary, Keyword: linearly independent elements

Search Result 7, Processing Time 0.03 seconds

ON FUZZY DIMENSION OF N-GROUPS WITH DCC ON IDEALS

  • Bhavanari, Satyanarayana;Kuncham, Syam Prasad;Tumurukota, Venkata Pradeep Kumar
    • East Asian mathematical journal
    • /
    • v.21 no.2
    • /
    • pp.205-217
    • /
    • 2005
  • In this paper we consider the fuzzy ideals of N-group G where N is a near-ring. We introduce the concepts: minimal elements, fuzzy linearly independent elements, and fuzzy basis of an N-group G and obtained fundamental related results.

  • PDF

Eliminating the Neutral Current by the Power Compensator without using Energy Storage Elements (에너지저장요소를 사용하지 않는 전력보상기에 의한 중성선 전류의 제거)

  • Kim, Hyo-Seong
    • The Transactions of the Korean Institute of Electrical Engineers B
    • /
    • v.48 no.6
    • /
    • pp.330-335
    • /
    • 1999
  • This paper proposed the p-q-r coordinate system where the instantaneous active power p, and the two instantaneous reactive powers qq, qr were defined. The three power components are linearly independent, so the compensation for the two instantaneous reactive powers leads to control the two components of the current space vector. With the theory, the neutral current of a three-phase four-wire system can be eliminated by only compensating the instantaneous reactive power using no energy storge element.

  • PDF

HYPOELLIPTICITY OF SYSTEMS OF ANALYTIC VECTOR FIELDS

  • Kwon, K.H.;Song, B.C.
    • Bulletin of the Korean Mathematical Society
    • /
    • v.26 no.1
    • /
    • pp.43-46
    • /
    • 1989
  • In this paper, we are concerned with the pointwise-hypoellipticity (see Definition 2.1) of an m-dimensional Frobenious Lie algebra L of analytic complex vector fields in somel open subset .ohm. of $R^{m+1}$. That is, L is a set of complex vector fields in .ohm. with (real-) analytic coefficients satisfying: (A) each point of .ohm. has an open neighborhood in which L is generated by m linearly independent elements of L; (B) L is closed under the commutation bracket [A, B]. The pointwise-analytic hypoellipticity of L is completely characterized by M.S. Baouendi and F. Treves in [1]. Here, we shall prove that if L is hypoelliptic at a point then it must be analytic hypoelliptic in a full neighborhood of the same point. When the coefficients are $C^{\infty}$, hypoellipticity of L was discussed in [2].2].

  • PDF

A Study on the Architectural Characteristics Revived from the Roman Architecture - Focused on the early Renaissance Architecture Building - (로마시대 건축으로부터 재생된 건축적 특성에 관한 연구 - 초기 르네상스시대 건축물을 중심으로 -)

  • Kim, Seok-Man
    • Journal of architectural history
    • /
    • v.18 no.2
    • /
    • pp.7-26
    • /
    • 2009
  • The purpose of this paper is the study on the architectural characteristics revived from the roman architecture, focused on the early renaissance architecture building. The results of study are as follow: 1. The composition system of Domus which is formed of urban house in the Roman period is presented by spatial arrangement of palace architecture centering around atrium in the Renaissance period. Thus plan type of Domus is used by atrium from which is composed of peristyle from the palace and villa in the Renaissance period. 2. The circular temple in the Roman period is composed of element such as podium, stair, peristyle centering around the basic circular plan. Bramante planed to revive above elements for the Tempietto to concept from the circular temple in the Roman period. 3. The triumphal arch in the Roman period is strong monument to the independent building in the city, but thus arch is used of church facade as the important example which is composed with building elevation in the Renaissance period. 4. The composition system and element of Roman temple which is planned to rectangular plan is composed of high podium, stair, portico, prostyle and pediment. The facade plan of church is used by the partial elements and total elements perfectly from the temple in the Roman period. 5. The linearly successive and repetitive composition which is composition system and element of aqueduct arches of same dimension shows to the palace facade, arcade for gallery space and side elevation plan of S.Fracesco church. 6. Such as background of Colloseum, Rucellai palace can be called good example which is created by the new architectural form to the creative starting point from the classical architecture from.

  • PDF

Parametric study of laterally loaded pile groups using simplified F.E. models

  • Chore, H.S.;Ingle, R.K.;Sawant, V.A.
    • Coupled systems mechanics
    • /
    • v.1 no.1
    • /
    • pp.1-7
    • /
    • 2012
  • The problem of laterally loaded piles is particularly a complex soil-structure interaction problem. The flexural stresses developed due to the combined action of axial load and bending moment must be evaluated in a realistic and rational manner for safe and economical design of pile foundation. The paper reports the finite element analysis of pile groups. For this purpose simplified models along the lines similar to that suggested by Desai et al. (1981) are used for idealizing various elements of the foundation system. The pile is idealized one dimensional beam element, pile cap as two dimensional plate element and the soil as independent closely spaced linearly elastic springs. The analysis takes into consideration the effect of interaction between pile cap and soil underlying it. The pile group is considered to have been embedded in cohesive soil. The parametric study is carried out to examine the effect of pile spacing, pile diameter, number of piles and arrangement of pile on the responses of pile group. The responses considered include the displacement at top of pile group and bending moment in piles. The results obtained using the simplified approach of the F.E. analysis are further compared with the results of the complete 3-D F.E. analysis published earlier and fair agreement is observed in the either result.

Synoptic Air Mass Classification Using Cluster Analysis and Relation to Daily Mortality in Seoul, South Korea (클러스터 분석을 통한 종관기단분류 및 서울에서의 일 사망률과의 관련성 연구)

  • Kim, Jiyoung;Lee, Dae-Geun;Choi, Byoung-Cheol;Park, Il-Soo
    • Atmosphere
    • /
    • v.17 no.1
    • /
    • pp.45-53
    • /
    • 2007
  • In order to investigate the impacts of heat wave on human health, cluster analysis of meteorological elements (e.g., temperature, dewpoint, sea level pressure, visibility, cloud amount, and wind components) for identifying offensive synoptic air masses is employed. Meteorological data at Seoul during the past 30 years are used. The daily death data at Seoul are also employed. Occurrence frequency of heat waves which is defined by daily maximum temperature greater than the threshold temperature (i.e., $31.2^{\circ}C$) was analyzed. The result shows that the frequency and duration of heat waves at Seoul are increasing during the past 30 years. In addition, the increasing trend of the frequency and duration clearly appears in late spring and early autumn as well as summer. Factor analysis shows that 65.1% of the total variance can be explained by 4 components which are linearly independent. Eight clusters (or synoptic air masses) were classified and found to be optimal for representing the summertime air masses at Seoul, Korea. The results exhibit that cluster-mean values of meteorological variables of an offensive air mass (or cluster) are closely correlated with the observed and standardized deaths.