http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Wu, Han,Zeng, Xiaohui,Xiao, Jianyu,Yu, Yang,Dai, Xin,Yu, Jianxing The Society of Naval Architects of Korea 2020 International Journal of Naval Architecture and Oc Vol.12 No.1
The aim of this study was to develop a new efficient strategy that uses the Vector form Intrinsic Finite-element (VFIFE) method to conduct the static and dynamic analyses of marine pipes. Nonlinear problems, such as large displacement, small strain, and contact and collision, can be analyzed using a unified calculation process in the VFIFE method according to the fundamental theories of point value description, path element, and reverse motion. This method enables analysis without the need to integrate the stiffness matrix of the structure, because only motion equations of particles established according to Newton's second law are required. These characteristics of the VFIFE facilitate the modeling and computation efficiencies in analyzing the nonlinear dynamic problem of flexible pipe with large deflections. In this study, a three-dimensional (3-D) dynamical model based on 3-D beam element was established according to the VFIFE method. The deep-sea flexible pipe was described by a set of spatial mass particles linked by 3-D beam element. The motion and configuration of the pipe are determined by these spatial particles. Based on this model, a simulation procedure to predict the 3-D dynamical behavior of flexible pipe was developed and verified. It was found that the spatial configuration and static internal force of the mining pipe can be obtained by calculating the stationary state of pipe motion. Using this simulation procedure, an analysis was conducted on the static and dynamic behaviors of the flexible mining pipe based on a 1000-m sea trial system. The results of the analysis proved that the VFIFE method can be efficiently applied to the static and dynamic analyses of marine pipes.
China’s emerging partnership network: what, who, where, when and why
Wuhan University,Min Ye 경희대학교 글로벌 통상·금융연구원 2019 International Trade, Politics and Development Vol.3 No.2
The purpose of this paper is to explore and test the motivation behind the evolution of China’s vast network of partnerships around the globe since the end of the Cold War.After combing through 24 types of partnerships with 78 countries, the authors empirically tested four hypotheses using data from Correlates of War and World Bank.The analysis indicates that China’s choice to build such an elaborate network is not random. On the contrary, it is largely determined by three factors: the need to counter the US pressure; the necessity of maintaining peace and stability along its borders and achieving the long-term goal of modernization.The research is among the first attempts to comprehensively test the possible motivations behind China’s partnership building efforts and provides a stepping stone for analyzing this important aspect of China’s foreign policy.
ON THE EXISTENCE OF AN ALMOST MAXIMAL RIGHT IDEAL IN A MATRIX RING
Lee, Wuhan 서울대학교 1968 서울대학교 論文集 Vol.19 No.-
R_n을 環 R로 만든 n˙次行列環이라고 하면, R_n이 原始環이되는 必要充分條件은 R이 原始環이다. 本論文의 目的은 弱遷移的環論에 있어서도 上記事實의 analogy가 成立함을 證明하는데 있다. 그 證明에 있어서, 槪極大右側 ideal이 重要한 役割을 하며, 그 定義는 다음과 같다. 環 R의 右側 ideal이 槪極大라 함은 다음 條件을 滿足할때이다. (1) 右側 ideal J_1,J_2에 대하여 J_1 ∩ J_2=i이면 J_1=I또는 J_2=I이다. (2) a∈ R, [I:a]⊃I 이면 a∈I 이다. (3) 右側 ideal J에 대하여 J⊃I 이면 N(I)∩J⊃I 이고 또 a∈ R, [J:a]⊇I 이면 [J:a]⊃I이다. Let R be the n×n matrix ring over a ring R. Then R is premitive if and only if R_n is primitive. The purpose of this note is to establish the analogy in the weakly transitive radical theory. The concept of an almost maximal right ideal is important in the study of weakly transitive radical theory. Its definition is as follows: A right ideal J of a ring R is called almost maximal provided (1) for right ideals J_1, J_2 of R, J_1∩J_2=I implies J_1=I or J_2=I (2) if a∈ R, [I:a]⊃I, then a∈I. (3) for a right ideal J, if J⊃I then N(I)∩J⊃I, and also if a∈ R, [J:a]⊇I then [J:a]⊃I.
ON THE COMPACTNESS OF STRUCTURE SPACE OF A RING
LEE, WUHAN 東國大學校 1965 論文集 Vol.2 No.-
If ? is a ring, the S(?) of all primitive ideals of ? is topologized in the following way: For a subset T of (?), the closure T of T in S(?) is the set of all ? of S(?) such that ?⊇?_T=∩{?}. With this topology, S(?) is called the structure space of ?. Let ?, ?, . . . be points of S(?). for each χ, and let U_χ=? Then the collection {U_χ}_χ∈? is an open basis of the topology. THEOREM 1. For a ring ? with a property that each ?, a∈?, is modular, S(?) is compact if and only of the radical of ? is modular. THEOREM 2. For a ring ? with a property that every nen-zero two-sided princial ideal is modular, S(?) is compact if and only if ? is generated by a finite number elements as an ideal.