• Title/Summary/Keyword: function concept

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BLOCH-TYPE SPACE RELATED WITH NORMAL FUNCTION

  • Choi, Ki Seong
    • Journal of the Chungcheong Mathematical Society
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    • v.24 no.3
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    • pp.533-541
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    • 2011
  • Let ${\omega}$ be a normal function. In this paper, we will extend the concept of Bloch space to Bloch-type space related with normal function ${\omega}$. We will investigate the properties of Bloch-type space ${\mathcal{B}}_{\omega}$ and the little Bloch-type space ${\mathcal{B}}_{{\omega},0}$ with weight ${\omega}$.

A Study on Development of Wargame Model's Standard Combat Organization Function (워게임 모델의 표준전투편성 기능 개발에 관한 연구)

  • Lee, Ki-Taek;Kwon, Ojeong;Jung, Bong-Ryong
    • Journal of the Korea Society for Simulation
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    • v.23 no.2
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    • pp.35-46
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    • 2014
  • This study investigates the wargame model application of SCO(Standard Combat Organization) concept and function for the first time. Firstly, we examine the combat organization function of wargame models suggested by published theses and research papers, and then analyze input processes and detail function of GORRAM(Ground Operation Resources Requirement Model) combat organization that is related to wargame logic. Secondly, we also reflect developed SCO algorithm and function, as follows. We defined SCO concept, and developed UI(User Interface) design and algorithm using main functions that are deducted by analyzing of existing combat organization. This algorithm consists of process, SCO, and error check algorithms. Finally, we analyzed the results of statistic verification on input time reduction and user convenience of combat organization function. Therefore, this study contributes to improving input time and user convenience of combat organization, as well as structuring new function of wargame model through the application of SCO concept and function.

Concept Optimization for Mechanical Product Using Genetic Algorithm

  • Huang Hong Zhong;Bo Rui Feng;Fan Xiang Feng
    • Journal of Mechanical Science and Technology
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    • v.19 no.5
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    • pp.1072-1079
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    • 2005
  • Conceptual design is the first step in the overall process of product design. Its intrinsic uncertainty, imprecision, and lack of information lead to the fact that current conceptual design activities in engineering have not been computerized and very few CAD systems are available to support conceptual design. In most of the current intelligent design systems, approach of principle synthesis, such as morphology matrix, bond graphic, or design catalogues, is usually adopted to deal with the concept generation, in which optional concepts are generally combined and enumerated through function analysis. However, as a large number of concepts are generated, it is difficult to evaluate and optimize these design candidates using regular algorithm. It is necessary to develop a new approach or a tool to solve the concept generation. Generally speaking, concept generation is a problem of concept synthesis. In substance, this process of developing design candidate is a combinatorial optimization process, viz., the process of concept generation can be regarded as a solution for a state-place composed of multi-concepts. In this paper, genetic algorithm is utilized as a feasible tool to solve the problem of combinatorial optimization in concept generation, in which the encoding method of morphology matrix based on function analysis is applied, and a sequence of optimal concepts are generated through the search and iterative process which is controlled by genetic operators, including selection, crossover, mutation, and reproduction in GA. Several crucial problems on GA are discussed in this paper, such as the calculation of fitness value and the criteria for heredity termination, which have a heavy effect on selection of better concepts. The feasibility and intellectualization of the proposed approach are demonstrated with an engineering case. In this work concept generation is implemented using GA, which can facilitate not only generating several better concepts, but also selecting the best concept. Thus optimal concepts can be conveniently developed and design efficiency can be greatly improved.

A Review of the Role of Domain in Representational Activities for Forming the Concept of Linear Functions (일차함수의 개념형성을 위한 표상활동에서 정의역의 역할에 대한 고찰)

  • Kim, Jin-Hwan
    • Communications of Mathematical Education
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    • v.24 no.1
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    • pp.49-65
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    • 2010
  • The purpose of this study is to encourage the role of domain to consider the teaching of the concept of functions in modeling real situations. To do this, it is analyzed that how to introduce the concept of functions and linear functions in textbooks treated in the 1st grade and the 2nd grade of middle school. This study also reviewed the role of domain in representational activities for modeling real situations using linear functions. In these reviews, it found that many textbooks do not consider the domain in the equations of functions and these graphs and several text books used linear functions for modeling real situations which are not represented by linear functions contextually. It is concluded that the domain of function is an important concept that will be considered any representational activities for functions.

The Function-oriented Conceptualization of Institutional Households and the Applications of Management Principals (수행활동을 중심으로 한 공공가정의 개념과 경영원리)

  • 송혜림
    • Korean Family Resource Management Association
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    • v.1 no.2
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    • pp.135-147
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    • 1997
  • This study was designed to identify the concept of institutional households in the context of its human-needs-satisfying function. The specific objectives of this study were to refine the research boundary of institutional households and to develop the management principals which is appropriate to the characteristics and orientations of institutional households. This study concludes as follows : 1. it is important to find various types and forms of institutional households for the more advanced study. 2. the professionals in family resource management area should have the future-oriented-perspectives in improving the concept of institutional households.

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p-PRECONVEX SETS ON PRECONVEXITY SPACES

  • Min, Won-Keun
    • Honam Mathematical Journal
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    • v.30 no.3
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    • pp.425-433
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    • 2008
  • In this paper, we introduce the concept of p-preconvex sets on preconvexity spaces. We study some properties for p-preconvex sets by using the co-convexity hull and the convexity hull. Also we introduce and study the concepts of pc-convex function, $p^*c$-convex function, pI-convex function and $p^*I$-convex function.

A Study on the Concept of Ul(鬱) in Medical History - Focused on the theory submitted by Zhang-Zihe(張子和) ('울(鬱)' 개념에 대한 역대의가들의 인식에 대한 고찰 - 장자화(張子和)의 논의를 중심으로)

  • Eun, Seok-Min
    • Journal of Korean Medical classics
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    • v.24 no.1
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    • pp.73-84
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    • 2011
  • In the pathological theory of Oriental medicine, the concept of Ul(鬱) largely comprises the two meanings as follows. One is the concept used as the meaning of pathological state originated from stasis in Qi-Xie(氣血) or the function of internal organs. The other is the concept used as the meaning of Ul-disease(鬱病), which is a group of symptom that is mostly characterized by stasis in function of Qi system. The concept of Ul in the medical classics was originated from "Neijing(內經)", and in this book it was depicted as five-Ul(五鬱). Since the concept of Ul was depicted in "Neijing", many relevant theory about it had been developed on the basis of the theory in "Neijing", and in the theoretical development like this, the concept of Ul had become a little bit complicated. With regard to the historical change like this, this study is going to focus on some argument in Ming(明) dynasty, which asserted the existence of deficiency[虛證] in Ul that had opposed the general thought of that time usually recognizing the concept of Ul as [實證]. In this point of view, this study regards Zhang-zihe(張子和) as a doctor who had made an important role in the theoretical development of Ul after "Neijing", and will newly analyze the theoretical development of Ul on the basis of the Zhang-zihe's Ul theory, which is seemed to have played the main role in the formation of concept of Ul as excessive state[實證].

Automated Development of Rank-Based Concept Hierarchical Structures using Wikipedia Links (위키피디아 링크를 이용한 랭크 기반 개념 계층구조의 자동 구축)

  • Lee, Ga-hee;Kim, Han-joon
    • The Journal of Society for e-Business Studies
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    • v.20 no.4
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    • pp.61-76
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    • 2015
  • In general, we have utilized the hierarchical concept tree as a crucial data structure for indexing huge amount of textual data. This paper proposes a generality rank-based method that can automatically develop hierarchical concept structures with the Wikipedia data. The goal of the method is to regard each of Wikipedia articles as a concept and to generate hierarchical relationships among concepts. In order to estimate the generality of concepts, we have devised a special ranking function that mainly uses the number of hyperlinks among Wikipedia articles. The ranking function is effectively used for computing the probabilistic subsumption among concepts, which allows to generate relatively more stable hierarchical structures. Eventually, a set of concept pairs with hierarchical relationship is visualized as a DAG (directed acyclic graph). Through the empirical analysis using the concept hierarchy of Open Directory Project, we proved that the proposed method outperforms a representative baseline method and it can automatically extract concept hierarchies with high accuracy.

Learning-possibility for neuron model in Medical Superior Temporal area

  • Sekiya, Yasuhiro;Zhu, Hanxi;Aoyama, Tomoo;Tang, Zheng
    • 제어로봇시스템학회:학술대회논문집
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    • pp.516-516
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    • 2000
  • We propose a neuron model that is possible to learn three-dimensional movement. The neuron model by imitating structure of a neuron, has the system resemble a neuron. We considered a neuron system based on the arguments, and wished to examine whether the system had reasonable function. Koch, Poggio and Torre believed that inhibition signal would shunt excitation signal on the dendrites. They believed that excitation signal operated input-signals and inhibition did as delayed ones. Thus, they were sure that function for directional selectivity was arisen by the shunting. Koch's concept is so important; therefore, we construct the neuron system with their concept. The neuron system makes the shunting function; thus, the model may have a function for directional selectivity. We initialized the connections and the dendrites by random data, and trained them by the back-propagation algorithm for three-dimensional movement. We made sure the defection of three-dimensional movement in the system.

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On the students' thinking of the properties of derivatives (도함수의 성질에 관련한 학생들의 사고에 대하여)

  • Choi, Young Ju;Hong, Jin Kon
    • The Mathematical Education
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    • v.53 no.1
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    • pp.25-40
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    • 2014
  • Mathematical concept exists in the structural form, not in the independent form. The purpose of this study is to consider the network which students actually have for the mathematical concept structure related to the properties of derivatives. First, we analyzed the properties of derivatives in 'Mathematics II' and showed the mathematical concept structure of the relations among derivatives, functions, and primitive functions as a network. Also, we investigated the understanding of high school students for the mathematical concept structure between derivatives and functions, and the structure between functions and second order derivatives when the functional formula is not given, and only the graph is given. The results showed that students mainly focus on the relation of 'function-derivatives', the thinking process for direction of derivative and the thinking style for algebra. On this basis, we suggest the educational implication that is necessary for students to build the network properly.