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국내 라셀기의 성능향상을 위한 니들과 가이드 구동장치 가상 시제품 개발
송석,김영규,Song, Suk,Kim, Young-Gyu 한국섬유공학회 2005 한국섬유공학회지 Vol.42 No.2
We have designed a new driving mechanism of the raschel machine for industrial fabrics using the eccentric earn. Domestic raschel machines for industrial fabrics have low productivity and high level of noise and vibration because it uses the pot earn in the main driving mechanism. The goal of this research is to reduce the noise and vibration, and to enhance the productivity of the domestic raschel machine. Three dimensional modeling of the parts was carried out by using MDT (mechanical desktop), and kinematic analysis has been implemented to design the new needle driving and the guide driving mechanisms using the Visual Nastran program. To estimate the safety of the principal parts of the mechanisms, finite element analysis (FEA) has been conducted by using Visual Nastran program. As the result of FEA, the newly designed needle driving and guide driving units is estimated safe under actual driving. Consequently, we have developed a virtual prototype of the needle driving and guide driving units of the raschel machine for industrial fabrics which increase the productivity remarkably and reduce the noise and vibration. Moreover, the results show that the needle dwells for $190^{\circ}$ at the uppermost position, and the guide performs shogging operation for $160^{\circ}$. This motion has the effect of enhancing the stability of loop formation during knitting operation by speeding up the shogging motion of the guide bar of the domestic raschel machine for industrial fabrics.
宋錫萬 ( Song Suck-man ) 현대영미어문학회 1987 현대영미어문학 Vol.5 No.-
The purpose of this study is to study the role of entailment in semantic interpretation of natural languages by making clear the notion of entailment and examining the ordering of entailments. Discussions in this study can be summarized as follows. 1. The aim of truth-condition semantics is to bring it out whether each of the infinite number of sentences in a language is analytically true, whether it is contradictory or anomalous, and whether it has any interpretative relations with other sentences through its semantic description. Another aim is to find out the entailment relations among sentences. To deal with entailment relations it is necessary to define entailment as follows: a sentence S entails another sentence P iff if S is true P must be true, and if P is false S must be false. Thus, if and only if S entails P, S is a sufficient truth-condition for P, and P is a necessary truth-condition for S. If and only if S both entails P and is entailed by P, then P is a necessary and sufficient truth-condition for S and P is a full paraphrase of S. 2. Presuppositions are of two kinds: logical and pragmatic. Logical presupposition is generally defined as follows: a sentence S presupposes another sentence P iff if S and its negation are true P must be true, and if P is false or lacks a truth-value both S and its negation must lack a truth-value. Pragmatic presupposition is the presupposition in accordance with the appropriateness of a speaker’s utterance for the real world (or the context). 3. The difference between entailment and presupposition comes from the treatment of the falsity of the sentence (c): (a) The king of France is bald. (b) The king of France is not bald. (c) There is a king of France. Kempson (1975 : 49) illustrates the difference between the two approaches as follows: 4. Many problems of semantics can be solved by assuming that the meaning of a sentence is a structured, partially ordered set of entailments, with the structure being determined by a combination of syntactic, lexical, phonological and logical considerations. It is necessary to find out some method out distinguishing between two sentences which share their entailments but are not synonymous. It is argued that the semantic rules of the grammar impose an internal structure on the entailments of a sentence and that two sentences which share their entailments but structure them differently should no longer be regarded as synonymous. The different structure of entailments affects pragmatic interpretation processes. The mechanism of variable substitution brings with it five groups of entailments, which behave differently in semantic and pragmatic inter-pretation: a) Foreground entailments, each of which must be relevant in its own right. b) The first background entailment, which acts as a presupposition, and which is crucially used in establishing the point of the utterance. c) Entailments which themselves entail background, which may be-but need not be-relevant in their own right. d) Entailments which are themselves entailed by the background, which may exhibit presuppositional behavior. e) Entailments which neither entail nor are entailed by the background, which should not be involved in normal interpretation, and can be so involved only at the cost of some infelicity.
송석만(Suck-Man Song) 영미어문학회 2004 영미어문학연구 Vol.20 No.2
I have argued that the unitary approach to connectives as linking elements is inadequate because it cannot account for free standing utterances with connectives and because it misses a number of empirical differences between distinct classes of connectives and thus fails to draw some interesting theoretical generalizations relating to the semantics of these devices. Adopting the relevance theoretical approach, a more promising one, I have argued that trere is more than one semantic type of connectives: some connectives encode concepts and others encode procedures. Conceptual connectives may contribute to the explicit content of an utterance, whereas procedural connectives may constrain the derivation of either the explicit content of an utterance or its implicit import. Conceptual connectives may be thought of as establishing conceptual links between propositions; procedural connectives, on the other hand, do not link propositions at any stage of the interpretation process: they indicate the computations such representations are intended to undergo.