한국어 듣기에서 중국인 학습자의 간접적 전략 사용 양상 연구 : KSL과 KFL 학습자 대비를 통해

chenxing 인하대학교 교육연구소 2019 교육문화연구 Vol.25 No.5

이 연구는 KSL과 KFL 중급 학습자가 한국어 듣기에 사용하는 간접적 전략에 대해 분석한 것이다. 특히 학습전략중에서 간접적 전략에 대한 사용 빈도의 차이를 분석하여, 차이가 있다면 어떤 전략에서 차이가 일어나는지, 그이유는 무엇인지를 알아보고자 하였다. 이를 통해 이 두 집단의 듣기 능력에 차이를 주는 요인이 간접적 전략 사용여부에 있음을 확인하였다. KSL 환경의 3급과 4급 학습자, KFL 환경의 3급과 4급 학습자가 한국어 듣기 과정에서 사용하는 간접 전략을살펴본 결과는 다음과 같다. 우선, KSL 환경에서 3급과 4급의 초인지 전략과 사회적 전략은 유의미한 차이를 보였다. 이와 달리, 평균값으로는 유의미한 사용 차이가 나타나지 않으나 세부 전략의 사용에 차이가 있는 경우도 있다. 첫째, KSL 환경에서의 3급과 4급 학습자를 비교하면, 정의적 전략의 세부 전략에서 유의미한 차이를 알게 되었다. 둘째, KFL 환경에서의 3급과 4급 학습자를 비교하면, 사회적 전략의 세부 전략에서 유의미한 차이를 알게 되었다. 셋째, KSL과 KFL 중급 학습자를 비교하면, 초인지 전략, 정의적 전략과 사회적 전략의 세부 전략에서 유의미한차이를 보였다. 그 중에서 3급 학습자는 정의적 전략의 세부 전략에서 유의미한 차이가 있는데 비해, 4급 학습자는초인지 전략, 정의적 전략과 사회적 전략의 세부 전략에서 유의미한 차이가 있는 것을 확인하였다. Study on Indirect Strategy Usage Patterns of Chinese Learners in Listening Korean-Based on KSL learners compared with KFL learners-. This study aims to analyze indirect strategies that KSL and KFL intermediate learners use to listen to Korean. To do this, the differences in frequency of use of indirect strategies among the learning strategies were analyzed, and if any, it examined that which strategy makes differences and what is the reason. The results of this analyze showed that using indirect strategy is the factor that makes difference in the listening ability of the two groups. Indirect strategies of listening Korean in the third and fourth level learners of KSL, third and fourth level learners of KFL, and intermediate learners of KSL and KFL were explored, and the results showed there is a meaningful difference between the social and metacognitive strategy of the third and fourth level in the KSL. On the contrary, there is no significant difference in the use of mean values, but there are some of differences in the use of detailed strategy. In that cases are as follow: (1) affective strategy when comparing the third and fourth level learners in the KSL ; (2) social strategy when comparing the third and fourth level learners in the KSL ; (3) affective strategy including social strategy and metacongnitive strategy when comparing KSL and KFL intermediate learners ; (4) affective strategy when comparing third level learners of KSL and KFL ; (5) affective strategy in social strategy and metacongnitive strategy when comparing fourth level learners of KSL and KFL.

INFINITELY MANY SMALL SOLUTIONS FOR THE ρ(χ)-LAPLACIAN OPERATOR WITH CRITICAL GROWTH

Chenxing Zhou,Sihua Liang 한국전산응용수학회 2014 Journal of applied mathematics & informatics Vol.32 No.1

In this paper, we prove, in the spirit of [3, 12, 20, 22, 23], the existence of infinitely many small solutions to the following quasilinear elliptic equation −Δp(χ)u+|u|p(χ)−2u = |u|q(χ)−2u+f(χ,u) in a smooth bounded domain Ω of RN. We also assume that {q(x) = p*(x)} ≠∅, where p*(χ) = Np(χ)=(N −p(χ)) is the critical Sobolev exponent for variable exponents. The proof is based on a new version of the symmetric mountainpass lemma due to Kajikiya [22], and property of these solutions are also obtained.

INFINITELY MANY SMALL SOLUTIONS FOR THE p(x)-LAPLACIAN OPERATOR WITH CRITICAL GROWTH

Zhou, Chenxing,Liang, Sihua The Korean Society for Computational and Applied M 2014 Journal of applied mathematics & informatics Vol.32 No.1

In this paper, we prove, in the spirit of [3, 12, 20, 22, 23], the existence of infinitely many small solutions to the following quasilinear elliptic equation $-{\Delta}_{p(x)}u+{\mid}u{\mid}^{p(x)-2}u={\mid}u{\mid}^{q(x)-2}u+{\lambda}f(x,u)$ in a smooth bounded domain ${\Omega}$ of ${\mathbb{R}}^N$. We also assume that $\{q(x)=p^*(x)\}{\neq}{\emptyset}$, where $p^*(x)$ = Np(x)/(N - p(x)) is the critical Sobolev exponent for variable exponents. The proof is based on a new version of the symmetric mountainpass lemma due to Kajikiya [22], and property of these solutions are also obtained.

韩中“同形异义”汉字词意义差异对比研究

范晨星(Fan, Chenxing) 한국중어중문학회 2017 中語中文學 Vol.0 No.68

이 연구는 한국어의 한자어와 이에 대응하는 동형이의 중국어의 의미를 대조 분석하여 의미 차이를 세분화하여 대조함으로써 한자어의 깊은 영향을 밝히고 한국어와 중국어의 실제 교육 현장과 두 언어의 번역에 가치 있는 한자어교학 및 번역 방안을 제공한다는 점에서 그 의의가 있다. 또한 이로서 한자어 대조 연구는 초보적 수준에서 벗어나 그 유용성을 강조하여 실질적 가치를 실현할 수 있을 것이다. 이 연구에서는 대량의 ‘동형이의’ 한자어 데이터를 분석하여 한·중 동형이의 한자어의 차용 초기 기원부터 변화 발전 과정 중 나타난 의미의 차이와 그 원인을 분석하고 그 차이로 인해 나타난 오류의 정확한 표현 등을 제시하고자 하였다. 이에 따라 한국어와 중국어 교육과 번역에 도움을 줄 수 있을 것이라고 본다. 본 연구의 연구 대상은 이음절의 한·중 “동형이의”한자어 100개이다. 먼저 『조선일보』의 2013년 상반기 78편의 사설에서 나타난 모든 한자어를 추출하여 본 연구의 연구 대상 범위에 맞게 이음절의 어근에 해당하는 560개 ’동형이의’한자어를 선정하였다. 다음으로 한국 국립국어원에서 출판한 『한국어 학습용 어휘 선정 결과 보고서』에 따라 사용 빈도가 높고 난이도가 높으며 시사성이 있는 100개의 어근을 본 연구의 연구 대상으로 선정하였다. 2장에서는 먼저 크게 한 · 중 한자어 간의 의미 관계를 정리하고 연구 대상이 되는 ’동형이의’한자어의 정의와 유형 특징을 확정하였다. 그 다음으로 『조선일보』 사설 문장에서 나타난 한자어와 그 중에 ‘동형이의’한자어의 실태를 살펴보았다. 3장에서는 이 연구의 주요 내용으로서 앞서 고찰 및 선별한 결과를 바탕으로 한국과 중국, 일본의 권위 있는 사전 등 전문 서적을 사용하여 이 100개의 한자어의 의미를 대조하였다. 그 결과 다음과 같은 분류를 도출할 수 있었다. 1)의미 범위가 다름으로 인한 의미 차이, 2) 의미의 항목이 확대 또는 축소로 인한 의미 차이, 3) 어휘의 의미 전이로 인한 의미 차이, 4) 종합적인 변화로 인한 의미 차이, 5) 감정적 색채로 인해 나타난 의미 차이이다. 이를 기원적 의미부터 의미의 변천 과정, 현대 의미가 형성까지 세분화하고 한·중 한자어의 의미 차이의 형성 원인과 변화 방식, 품사, 다른 어휘들과의 조합 및 대응 표현 등 다각적으로 체계적인 분석을 하였다. 그뿐만 아니라 의미의 차이로 인해 나타난 다른 표현 방식에 대해 각기 상세하고 설명하고 이를 교정하였다. 즉, 한국어와 중국어에서 다른 의미를 나타낼 경우 한국어에 대응하는 적절한 중국어 표현과 중국어에 대응하는 한국어의 적절한 표현을 제시하였다. 마지막으로 4장에서는 이 연구의 결론 부분으로서 그간의 연구 성과를 정리하였다. 한중 한자어의 복잡한 의미 관계와 양 언어의 변화에 영향을 미친 다방면의 원인을 밝히고 이로부터 한자어의 의미 변화가 나타내게 된 다섯 가지 원인을 고찰하였다. 또한 이 연구의 한계점과 함께 본 연구를 통해 향후에 더 심화되고 정밀한 한자어 연구 및 교학에 대한 전망에 대해 기술하였다. There has a common feature in the aspect that Chinese and Korean students from two different countries learn each other’s language, that is, the characters and words. The Chinese characters and words are just like a double-edged sword, and the “homographs” of Chinese characters and words takes the largest proportion, and the hugest vocabulary, which brought Chinese learners who are native Korean and Korean learners who are native Chinese huge learning advantages. But the two categories of words “homographs” and “allo-graphic synonyms” set a great learning barrier to learners, resulting in “the phenomenon of language interference.” Especially the “homographs”,due to the same form of morpheme and extremely interfered by the mother tongue,is the most difficult category of words to learn. The purpose of this paper is to have a detailed comparative analysis of the differences in meanings established on the “homographs” both in Chinese and Korean, and to analyze the differences between the words and phrases by means of the meaning contained in dictionary; to conclude the types of the meaning differences; to illustrate the correct expression form of the corresponding target language with different meaning; to sum up the causes of differences in meaning, to provide valuable Chinese words database for the future foreign language teaching, Korean to Chinese translation and the compilation of Korean to Chinese teaching materials. At the same time the paper proposes the application values of Chinese characters and words in the second foreign language teaching and translation work to fundamentally improve and resolve the misunderstanding and misusing brought by Chinese characters, and to help learners can more clearly distinguish the different meanings between Korean and Chinese characters, and can apply it flexibly, minimizing the negative impact brought by the “homographs” of Chinese words. This paper chose the editorial articles from Chosun Ilbo, the topissued newspaper, as the base material for words selection, and we selected the disyllabic Chinese “homographs” from all of the editorial articles in the first half of 2013 as the research object of this paper. In the second chapter, we first examine the morphological form, the characteristics and the distribution of all the Chinese words in the Chosun Ilbo, and then examine the physical forms of the “homographs” of Chinese words in the editorial articles in detail. Finally, combined with the Vocabulary Selection Report of Korean Language Learning to find out the highly used and high-level 100 cases of “homographs” of Chinese words as the final words to examine. In the third chapter, the differences of types of the “homographs” of Chinese words was divides into five categories: “meaning difference caused by the expansion or reduction of meaning scale”, “meaning difference caused by the increasing or decreasing of meaning terms”, “meaning differences caused by meaning shift”, “meaning differences caused by compound forms”, “meaning differences caused by different emotions”. By means of using the most authoritative ancient dictionaries, modern dictionaries, contemporary dictionary of the three countries of Korea, China and Japan and online inquiries and other ways to have a systematic illustration and contrastive analysis of the meaning difference of the 100 cases of “homographs” of Chinese words and to clarify the appropriate expression of the target language corresponding to the different meanings, and summarize its distribution ratio and characteristics. In the fourth chapter, it is also the conclusion, summarizing the research results and the significance of the full text: to propose the useful value of “homographs” of Chinese words, and to propose the expectation and the prospect of the future Chinese words teaching and further research.

The flow structure prediction of an oil diffusion vacuum pump by computational fluid dynamics method

Xiaodong WANG,He LI,Xiyue CHENXING 한국진공학회 2016 한국진공학회 학술발표회초록집 Vol.2016 No.8

Antiarrhythmic effects of ginsenoside Rg2 on calcium chloride-induced arrhythmias without oral toxicity

Dongxia Gou,Xuejing Pei,Jiao Wang,Yue Wang,Chenxing Hu,Chengcheng Song,Sisi Cui,Yifa Zhou 고려인삼학회 2020 Journal of Ginseng Research Vol.44 No.5

Background: Malignant arrhythmias require drug therapy. However, most of the currently available antiarrhythmic drugs have significant side effects. Ginsenoside Rg2 exhibits excellent cardioprotective effects and appears to be a promising candidate for cardiovascular drug development. So far, the oral toxicity and antiarrhythmic effects of Rg2 have not been evaluated. Methods: Acute oral toxicity of Rg2 was assessed by the Limit Test method in mice. Subchronic oral toxicity was determined by repeated dose 28-day toxicity study in rats. Antiarrhythmic activities of Rg2 were evaluated in calcium chloride-induced arrhythmic rats. Antiarrhythmic mechanism of Rg2 was investigated in arrhythmic rats and H9c2 cardiomyocytes. Results: The results of toxicity studies indicated that Rg2 exhibited no single-dose (10 g/kg) acute oral toxicity. And 28-day repeated dose treatment with Rg2 (1.75, 3.5 and 5 g/kg/d) demonstrated minimal, if any, subchronic toxicity. Serum biochemical examination showed that total cholesterol in the high-dose cohort was dramatically decreased, whereas prothrombin time was increased at Day 28, suggesting that Rg2 might regulate lipid metabolism and have a potential anticoagulant effect. Moreover, pretreatment with Rg2 showed antiarrhythmic effects on the rat model of calcium chloride induced arrhythmia, in terms of the reduced duration time, mortality, and incidence of malignant arrhythmias. The antiarrhythmic mechanism of Rg2 might be the inhibition of calcium influx through L-type calcium channels by suppressing the phosphorylation of Ca<SUP>2+</SUP>/calmodulin-dependent protein kinase II. Conclusion: Our findings support the development of Rg2 as a promising antiarrhythmic drug with fewer side effects for clinical use.

Deep dechlorination of hydrocarbon oil by reactive adsorption on TiO2-based metal oxides

Hui Niu,Yuyu Feng,Jie Ding,Wei Zhang,Chenxing Hu,Qingxiang Zhang,Chen Zhang,Cuiqing Li 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.7

This study reports reactive adsorptive dechlorination of hydrocarbon oil over TiO2-based metal oxides atthe temperatures of 20-150 oC. TiO2 and a series of TiO2-CeO2 were prepared by precipitation method and characterizedby N2 adsorption, XRD, FT-IR, pyridine-IR, NH3-TPD and CO2-TPD. The characterization results showed thatboth the acidity and basicity of the adsorbent had a significant impact on its dechlorination capacity. TiO2-U precipitatedby urea exhibited higher dechlorination capacity than TiO2-A precipitated by ammonia due to the higher surfacearea, more acid and base amounts of the former. Among various Ti(1x)CexO2 (x=0.1, 0.3, 0.5, 0.7, 0.9, 1) oxides,Ti0.7Ce0.3O2 and Ti0.3Ce0.7O2 bimetallic oxides showed higher dechlorination capacity than TiO2-U, and the chlorineremoval over Ti0.7Ce0.3O2 reached 82.8% after adsorption at 150 oC for 3 h. Mixing 5 wt% of alkali earth metal oxideinto Ti0.7Ce0.3O2 mechanically enhanced its dechlorination capacity, and the chlorine removal over Ti0.7Ce0.3O2-BaOreached as high as 92.1%. The chlorine removal increased with increasing the adsorption temperature. Ion chromatographyand GC-MS analysis revealed that organochlorine compound was converted into Cl and its corresponding alcoholover the adsorbent at 150 oC. Finally, the mechanism of reactive adsorption dechlorination was proposed.

The design and fabrication of 81.25 MHz RFQ for Low Energy Accelerator Facility

Bo Zhao,Shuping Chen,Tieming Zhu,Fengfeng Wang,Xiaofeng Jin,Chenxing Li,Wei Ma,Bin Zhang 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.2

To provide high shunt impendence with low power losses, an 81.25 MHz continuous wave (CW) radiofrequency quadrupole (RFQ) accelerator has been designed and machined as parts of the Low EnergyAccelerator Facility (LEAF). In this paper, the mechanical structure and the main processing technology ofthe RFQ cavities are described according to the physical and geometric parameters requirements of theRFQ. The fabrication of the RFQ has been completed and the test results agree well with the designrequirements. The RFQ accelerator will work in Institute of Modern Physics, Chinese Academy of Sciencesin 2018.

Resistance Reduction Scheme for Tower Grounding with Conductive Cement

Lun Li,Tian Xu,Pei Feng,Liu Xin,Jia Lulu,Deng Chenxing,Wang Xing,Lan Fen,Cheng Hongbo 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.3

The construction conditions of transmission lines are becoming more and more diffi cult. It is necessary to fi nd new ways to reduce the grounding resistance of poles and towers at high soil resistivity and small construction area. Conductive cement samples with graphite, stainless steel fi bers, and their mixtures as conductive phases materials were prepared, the resistivity, fl exural strength and compressive strength were tested, compared and analyzed. The graphite and stainless steel fi ber conductive cement with better comprehensive performance was selected out for tower grounding. The application schemes of conductive cement for tower grounding were designed and compared, the partial wrapping scheme was selected and its application methods under diff erent soil resistivity was analyzed. The analysis results can provide theoretical basis and guidance for the application of conductive cement in transmission tower grounding, the feasibility of scheme is proved by the fi eld application.

Integrated microactuation scanning probe microscopy system

Chen, Xing,Lee, Dong-Weon American Vacuum Society 2009 JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B - Vol.27 No.3