Influence of Initial Pearlite Morphology on the Microstructure Evolution During Heat Treatment of 1.0C–1.5Cr Steel

Zhen‑Xing Li,Chang‑Sheng Li,Seong‑Hoon Kim,Dong‑Woo Suh 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.1

Effect of initial pearlite morphology on the microstructure evolution during spheroidization annealing and subsequent hardeningtreatment was studied in hot-rolled 1.0C–1.5Cr bearing steel. The ferrite-to-austenite transformation in spheroidizationannealing can be accelerated by refining the pearlite interlamellar spacing and pearlite colony size. Decreasing interlamellarspacing is also beneficial to increasing the number density of undissolved cementite, leading to the refining of final spheroidizedcementite. During the re-austenitizing process of hardening treatment, the smaller initial spheroidized cementiteleads to faster cementite dissolution and finer undissolved cementite particles. The prior austenite grain size after hardeningtreatment can also be decreased by refining the initial pearlite microstructure.

A Study of the Content Validity of Reading Comprehension Tests in NMET II

Zhen-Jie Liu,Ming-Hao Jin 대한언어학회 2018 언어학 Vol.26 No.4

Liu, Zhen-Jie & Jin, Ming-Hao. (2018). A study of the content validity of reading comprehension tests in NMET II. The Linguistic Association of Korea Journal, 26(4), 103-124. Based on Bachman and Palmer’s (1996) framework of task characteristics, this paper aims to compare the reading comprehension tests of the 2013-2017 National Matriculation English Test II (NMET II) with the requirements of the New Curriculum Standards and Testing Syllabus, in particular, concerning the content validity of the tests in terms of the characteristics of input and expected responses. The implications of this study are discussed for test designers, teachers, and students. The results show that reading comprehension tests from 2013 to 2017 basically meet the requirements of the New Curriculum Standard and Testing Syllabus and have a high content validity. In terms of the characteristics of input, the length, reading speed, and readability of comprehension passages are appropriate for students; however, the distribution of topics and genres in each year is uneven. In terms of the characteristics of expected responses, the wordings of questions and the design of question items are reasonable. However, the response type is mainly restricted to selected response questions (multiple-choice), and the measure of reading skills coverage is unbalanced.

多节点世界、 新冠疫情与中国公共外交

颜震 ( Yan¸ Zhen ) 성균관대학교 성균중국연구소 2021 중국사회과학논총 Vol.3 No.1

伴随经济全球化的深入与信息化社会经济的建立, 一个多节点世界正在形成, 展现出去极性、网络性、互动性的特征, 将国家、社会和个体都卷入其中, 彼此嵌套, 成为诠释当下乃至未来国际秩序的有力模型。新冠疫情的暴发则对多节点世界造成了一定的冲击与影响, 让多节性的内涵更为复杂。在多节点世界里, 中国所特有的公共外交资源、外交传统、丰富的交流方式以及与世界对接的能力可以很好地迎合时代的需要, 同时也面对着节点本身复杂性、社会压力、风险管理体制等现有条件的制约和挑战。从多节点世界的角度进行思考和探索, 将有助于中国公共外交更为健康地向前发展。 Accompanying the development of globalization and the advent of information society, a multinodal world is increasingly taking shape. The depolarization, network and interactivity characteristics of the multinodal world have formulated a convincing model to interpret contemporary as well as future international order, and inevitably delivers great impact on public diplomacy in the coming new era. The outbreak of the Covid-19 pandemic has further complicated the multinodal world by changing or accelerating its existing characteristics. Facing explicit challenges, China, with its special public diplomacy resources, diplomatic tradition, diversified communication models and the capability to reach out to the world, can well meet the need of the times, as well as review the complex nature of the nodes, social pressure and the limitations of its risk management system. To think from the angle of multinodality will help China develop better and healthier public diplomacy.

跨世紀韓國與中國山東省 經貿合作前景展望

范振洪,李炳鎭 평택대학교 1999 論文集 Vol.13 No.-

本文??述了跨世紀韓國與中國山동省經貿合作的前景問題. (1) 跨世紀韓國與中國山東省經貿合作的有利條件 制約要所 (2) 跨世紀韓國與中國山東省經貿合作的重点 ; (3) 跨世紀韓國與中國山東省經貿合作的對策.

小數民族對中國文化的貢獻

白振聲 漢陽大學校 民族學硏究所 1995 民族과文化 Vol.3 No.-

略論明淸戱曲對小說的主動接受

李眞瑜 中國語文硏究會 1995 中國語文論叢 Vol.9 No.-

關于中國朝鮮文敎材審査·出版制度及對中國延邊朝鮮族敎育現狀的思考

朴貞愛 한국한문교육학회 2003 한문교육논집 Vol.21 No.-

이 논문은 중국에서의 朝鮮文 교재심사제도와, 연변의 漢語교육 현황, 그리고 연변 조선족 교육현황으로 구성되었다. ① 조선문 교재 심사 제도를 개관하고, 이어서 조선문 교재 편찬과 출판발행 과정을 약술하였다. ② 延邊에서의 한어(한자어)교육상황과, 중국 조선문 교재 한자어사용 상황을 약술하였다. ③ 연변 조선족 교육현황을 분석하였다. 특히 ③에서 조선족 학생들이 한족학교로 전학하거나 한족학교에 다니는 문제와, 사회와 가정의 원인으로 조선족교육은 영향을 받고 있음을 논하였다. 즉 연변에는 및 년 전부터 출국 붐으로 인하여 불완전한 통계에 따르면 불법으로 한국에서 일하는 사람이 근 15만 명에 이른다고 한다. 현재 조선족교육은 이로 인하여 가정이나 사회적으로 큰 영향을 받고 있다. 單親가정의 출현이 많아지면서 조선족학생이 공부를 하지 않으나 혹은 중퇴하는 경우가 많다. 첫째, 출국한 부모나 친척들은 외국에서 적지 않은 돈을 벌어 보내지만 국내에 있는 자녀들은 그 돈을 쓰는데 신경을 많이 쓰고 학습에는 신경을 적게 쓰거나 아예 쓰지도 않은 경우가 많다. 둘째, 부모들이 장기간 외국에 있으니 자녀들을 할머니, 할아버지 혹은 친척집에 의탁하는 현상이 많다. 셋째, 출국 붐으로 인하여 독신과 불안정가정이 증가되는 추세를 이루고 있다. 그리고 조선족 인구 감소로 인한 문제와 농촌 황폐화로 인한 문제를 논하였다. 현재 연변조선족 교육이 직면하고 있는 문제에 대하여 하루 발리 대책을 세워서 사상을 해방하고 관념을 전환하며 기회를 포착하고 일심 협력하여 연변 조선민족교육의 진흥과 발전을 위하여 새로운 도약을 위하여 노력한다면 조선족 교육의 전망은 결코 암담하지만은 않을 것이다. This paper is consisted of three parts : inspection system of Korean textbook in China, outline of Chinese and Korean education in Yanbian district. First, I introduced the inspection system of Korean textbook in China, and sketched out the edition of Korean textbook and publishing of it. Second, I brought in the situation of education of Chinese and usage of Chinese characters in the Korean textbook in Yanbian district. Third, my analysis was made on the present condition of education of Korean people in Yanbian district. In Yanbian district, the prospects of education of Korean people would not gloomy, if we tried to leap for a development and progress of education for Korean people. It means that we would better to make a specific program on the problems of education for Korean people in Yanbian district, and liberate the thoughts and change the notions on the problems, and unite together in Korean people as one.

30年代中國文壇的重要一翼 : 民族主義文藝運動社團與報刊考辨

錢振綱 中國語文硏究會 2001 中國語文論叢 Vol.21 No.-

민족주의 문예운동은 국민당의 은밀한 지지 하에 일어난 것으로, 1930년대 중국 문단의 일대 사건이라 할 수 있을 것이다.이러한 민족주의 문예운동 중에는 적지 않은 文藝社團과 문예잡지가 등장하였으므로 민족주의 문예운동에 대해 보다 깊이 있는 연구를 하기 위해서는 문예사단과 잡지에 대한 고찰이 먼저 이루어져야할 필요가 있다.민족주의 문예운동의 발전사는 대개 두 시기를 거쳤다고 생각해 볼 수 있는데, 본 고에서는 사단과 잡지에 대한 고찰을 하되, 그 진행과정을 전ㆍ후기로 나누어 살펴보았다.그리고 당시에는 또 다른 우익문예사단과 잡지가 잇었는데, 이것을 민족주의 문예파로 오인하는 경우가 있어, 그것에 대해서도 구분하여 설명하였다.

호이스트용 SRM의 구동시스템의 특성해석

이진국,이동희,안진우 경성대학교 공학기술연구소 2005 공학기술연구지 Vol.12 No.-

This paper presents a development of Switched Reluctance Motor (SRM) drive system for a hoist application. In the hoist system, smoothing start-up and braking are very important for a protection of goods. In order to improved a start-up and a stop performance of hoist system, the smoothing operation sequence of SRM using direct instantaneous torque control is proposed. The proposed Direct Instantaneous Torque Control (DITC) the instantaneous torque of SRM according to the switching sequence and hysteric band. In order to compare the reference and actual torque of SRM, pre-measured flux and torque look-up table are regulate used. The proposed SRM Drive system is verified by the simulation result.

4-레벨 인버터를 이용한 고속 SRM 구동시스템

이동희,이진국,안진우 경성대학교 공학기술연구소 2005 공학기술연구지 Vol.12 No.-

This paper proposes high speed SRM drive system for blower with a novel 4-level inverter and precise excitation position generator. In order to get a fast build-up and a demagnetization of excitation current, 4-level inverter system is proposed. The proposed 4-level inverter has additional charge capacitor, power switch and diode in the conventional asymmetric converter. The charged high voltage is supplied to the phase winding for fast current build- up, and demagnetization current is charged to additional capacitor of 4-level inverter. In addition, a precise excitation position generator can reduce turn-on and turn-off angle error according to sampling period of digital control system. The proposed high speed SRM drive system is verified by computer simulations and experimental results.