韩国学生致使句偏误分析及教学对策

李雪花(LI, XUEHUA),金原希(KIM, WONHEE) 한국중어중문학회 2015 中語中文學 Vol.61 No.-

This study was to investigate the situation of Korean students’ acquiring Chinese causative sentence by using the questionnaire survey method, to analyze the errors in using the causative sentence, and to suggest the appropriate teaching strategies. The Chinese causative sentence is divided into causative sentence, imperative sentence, split causative sentence, V type causative sentence, resulative causative sentence, and verb causative sentence. The Chinese education as an object of foreign students was generally conducted by including the imperative sentence in the causative sentence to teach students. Accordingly, this study was to conduct the questionnaire by dividing the causative sentence above into causative sentence(including imperative sentence), split causative sentence, V type causative sentence, resulative causative sentence, and verb causative sentence. The students who participated on the questionnaire are ones who had learned Chinese and taken the subject of Chinese grammar. This study was to investigate the situation of acquiring the causative sentence by dividing these students into the basic and intermediate level(1-3 years) group and advanced level(more than 3 years) group. As a result, the more the learning period, the more the acquisition and utilizing capability of Chinese causative sentence compared with the students who did not. This study has found out that the utilizing capability of Chinese-Korean in both two groups was higher than that of Korean-Chinese. In the error analysis of causative sentence, the error of causative sentence learned first and familiar among the causative sentence was lowest, and the error of verb causative sentence was most. This study has shown the five types of errors like addition, substitution, omission, misuse of word order, and complexity. It needs to consider the educational approaches in order that the students could understand and use the Chinese causative sentence more effectively. This researcher considers it as it requires the grasping of difference with the Korean causative sentence through the comparative analysis as well as the conducting of various training exercises by recognizing the types of causative sentence to the students exactly. In addition, the structure of partial causative sentence can be understood cognitively by utilizing the iconicity.

Investigation on Pore-fracture of Coal and Its Influence Mechanism on Uniaxial Compression Failure Behavior

Yutao Li,Qingwei Guo,Yaodong Jiang,Bo Zhang,Xuehua Li 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.5

Pore-fracture is an important component of coal, affecting the uniaxial compression failure behavior. However, it is difficult to effectively characterize the influence mechanism because of the complexity and randomness of components in coal. In this paper, scanning electron microscope (SEM), computed tomography (CT), indentation hardness and uniaxial compressiontests are conducted for specimens with high, medium and no bursting proneness to investigate it. The results indicate that distribution of three components (matrix, minal and pore-fracture) in specimens are extremely different, which is the embodiment of tectonic structure activity and geological condition of mineralization. The levels of bursting proneness of coal, the tectonic structure features, tectonic structure activities and external functions are related. 3-D reconstruction on the basis of CT images can visualize internal complex structure of specimens. The numerical simulation results demonstrate that distribution of pore-fracture, mechanical properties of matrix and minal are significant inducement of specimen’s failure difference in the identical loading mode. Main failure mode of specimens with high, medium and no bursting proneness are different, which proves that main failure mode of specimen correlates with its mechanical properties. The mechanical failure behavior of specimen under uniaxial compression is influenced by loading mode, mechanical properties of matrix and minal, pore-fracture feature and other considerations. The loading mode is extrinsic cause of mechanical failure behavior of specimens, also an inducing factor and could be intervened. Furthermore, mechanical properties of matrix and minal determine bearing capacity and ultimate failure mode of specimens. Primary pore-fracture seriously affects extension process and extension mode of secondary pore-fracture, and the internal damage development of specimens. Notably, coal composed by the convergence of matrix, minal and pore-fracture, all these are internal cause of mechanical failure behavior of specimens, which belong to basic factors and hard to be intervened.

Stochastic Stability of the Improved Maximum Correntropy Kalman Filter Against Non-Gaussian Noises

Xuehua Zhao,Dejun Mu,Zhaohui Gao,Jiahao Zhang,Guo Li 제어·로봇·시스템학회 2024 International Journal of Control, Automation, and Vol.22 No.3

In this paper, an improved maximum correntropy Kalman filter (IMCKF) algorithm is proposed to enhance the estimation accuracy of conventional correntropy based Kalman filter against the non-Gaussian noise. Toincrease the proposed algorithm estimation precision, a novel cost function is introduced based on weighted factors. Then the IMCKF algorithm is put forward and derived in detail. Furthermore, the stochastic boundness of theestimation error is discussed to illustrate the IMCKF algorithm’s stability. Finally, simulation results demonstratethat the proposed IMCKF algorithm increases the estimation precision and robustness performance in contrast tothe conventional Gaussian Sum Kalman filter and maximum correntropy Kalman filter.

MoS2 Layers Decorated RGO Composite Prepared by a One-Step High-Temperature Solvothermal Method as Anode for Lithium-Ion Batteries

Xuehua Liu,Bingning Wang,Jine Liu,Zhen Kong,Binghui Xu,Yiqian Wang,Hongliang Li 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2018 NANO Vol.13 No.11

A one-step high-temperature solvothermal approach to the synthesis of monolayer or bilayer MoS2 anchored onto reduced graphene oxide (RGO) sheet (denoted as MoS2/RGO) is described. It was found that single-layered or double-layered MoS2 were synthesized directly without an extra exfoliation step and well dispersed on the surface of crumpled RGO sheets with random orientation. The prepared MoS2/RGO composites delivered a high reversible capacity of 900 mAhg -1 after 200 cycles at a current density of 200 mAg -1 as well as good rate capability as anode active material for lithium ion batteries. This one-step high-temperature hydrothermal strategy provides a simple, cost-effective and eco-friendly way to the fabrication of exfoliated MoS2 layers deposited onto RGO sheets.

miR-30c regulates proliferation, apoptosis and differentiation via the Shh signaling pathway in P19 cells

Xuehua Liu,Mengmeng Li,Yuzhu Peng,Xiaoshan Hu,Jing Xu,Shasha Zhu,Zhangbin Yu,Shuping Han 생화학분자생물학회 2016 Experimental and molecular medicine Vol.48 No.-

MicroRNAs (miRNAs) are small, non-coding single-stranded RNAs that suppress protein expression by binding to the 3′ untranslated regions of their target genes. Many studies have shown that miRNAs have important roles in congenital heart diseases (CHDs) by regulating gene expression and signaling pathways. We previously found that miR-30c was highly expressed in the heart tissues of aborted embryos with ventricular septal defects. Therefore, this study aimed to explore the effects of miR-30c in CHDs. miR-30c was overexpressed or knocked down in P19 cells, a myocardial cell model that is widely used to study cardiogenesis. We found that miR-30c overexpression not only increased cell proliferation by promoting cell entry into S phase but also suppressed cell apoptosis. In addition, we found that miR-30c inhibited dimethyl sulfoxide-induced differentiation of P19 cells. miR-30c knockdown, in contrast, inhibited cell proliferation and increased apoptosis and differentiation. The Sonic hedgehog (Shh) signaling pathway is essential for normal embryonic development. Western blotting and luciferase assays revealed that Gli2, a transcriptional factor that has essential roles in the Shh signaling pathway, was a potential target gene of miR-30c. Ptch1, another important player in the Shh signaling pathway and a transcriptional target of Gli2, was downregulated by miR-30c overexpression and upregulated by miR-30c knockdown. Collectively, our study revealed that miR-30c suppressed P19 cell differentiation by inhibiting the Shh signaling pathway and altered the balance between cell proliferation and apoptosis, which may result in embryonic cardiac malfunctions.

Evaluation fo Field Performance and Approval criteria in Herbicide Registration in China

Zhen Li,Xuehua An,Xueping Zhao 한국잡초학회 2011 한국잡초학회 별책(학술대회 초록집) Vol.31 No.2

Responses of Low-Quality Soil Microbial Community Structure and Activities to Application of a Mixed Material of Humic Acid, Biochar, and Super Absorbent Polymer

Fangze Li,Shuhui Men,Shiwei Zhang,Juan Huang,Xuehua Puyang,Zhenqing Wu,Zhanbin Huang 한국미생물·생명공학회 2020 Journal of microbiology and biotechnology Vol.30 No.9

Low-quality soil for land reuse is a crucial problem in vegetation quality and especially to waste disposal sites in mining areas. It is necessary to find suitable materials to improve the soil quality and especially to increase soil microbial diversity and activity. In this study, pot experiments were conducted to investigate the effect of a mixed material of humic acid, super absorbent polymer and biochar on low-quality soil indexes and the microbial community response. The indexes included soil physicochemical properties and the corresponding plant growth. The results showed that the mixed material could improve chemical properties and physical structure of soil by increasing the bulk density, porosity, macro aggregate, and promote the mineralization of nutrient elements in soil. The best performance was achieved by adding 3 g·kg-1 super absorbent polymer, 3 g·kg-1 humic acid, and 10 g·kg-1 biochar to soil with plant total nitrogen, dry weight and height increased by 85.18%, 266.41% and 74.06%, respectively. Physicochemical properties caused changes in soil microbial diversity. Acidobacteria, Bacteroidetes, Chloroflexi, Cyanobacteria, Firmicutes, Nitrospirae, Planctomycetes, and Proteobacteria were significantly positively correlated with most of the physical, chemical and plant indicators. Actinobacteria and Armatimonadetes were significantly negatively correlated with most measurement factors. Therefore, this study can contribute to improving the understanding of low-quality soil and how it affects soil microbial functions and sustainability.

CT Findings of Intrarenal Yolk Sac Tumor with Tumor Thrombus Extending into the Inferior Vena Cava: A Case Report

ShaoChun Lin,XueHua Li,CanHui Sun,ShiTing Feng,ZhenPeng Peng,SiYun Huang,ZiPing Li 대한영상의학회 2014 Korean Journal of Radiology Vol.15 No.5

Yolk sac tumor (YST) is a rare germ cell neoplasm of childhood that usually arises from the testis or ovary. The rare cases of YST in various extragonadal locations have been reported, but the primary intrarenal YST is even more uncommon. Here, we report a case of a primary intrarenal YST with tumor thrombus of the inferior vena cava and left renal vein in a 2-year-old boy, with an emphasis on the CT features. To our knowledge, this is the first reported case of an intrarenal YST with intravascular involvement.

Proline, Sugars, and Antioxidant Enzymes Respond to Drought Stress in the Leaves of Strawberry Plants

Sun, Cunhua,Li, Xuehua,Hu, Yulong,Zhao, Pingyi,Xu, Tian,Sun, Jian,Gao, Xiali Korean Society of Horticultural Science 2015 원예과학기술지 Vol.33 No.5

Drought is a severe abiotic stress that affects global crop production. A drought model was created for 'Toyonoka' Fragaria ${\times}$ ananassa, and the effects of drought stress on contents of proline, sugars, and antioxidant enzyme activities were investigated. Strawberry transplants with identical growth were chosen for the experiments and the randomized design included four replications (10 plants per block). The experimental sets differed in the moisture level of the culture medium relative to the range of moisture content as follows: control, 70-85%; mild drought stress, 50-60%; moderate drought stress, 40-50%; and severe drought stress, 30-40%. Drought stress was imposed by limiting irrigation. Plants were sampled and physiological parameters w ere measured on 0, 2, 4, 6, 8, and 10 days after the commencement of droughts tress. The water potential of strawberry leaves decreased in the plants under mild, moderate, and severe stress during the course of the water stress treatment and exhibited a significant difference from the control. Strawberry leaves subjected to drought stress had higher accumulation of proline, sugars, and malondialdehyde, and higher activities of superoxide dismutase, peroxidase, and catalase than leaves of control plants. Malondialdehyde levels increased in parallel with the severity and duration of drought stress. By contrast, antioxidant enzyme activity displayed dynamic responses to drought stress, first increasing and subsequently decreasing as the severity and duration of drought stress increased. These results suggest that strawberry plants respond to drought stress by altering the activities of antioxidant enzymes and the levels of osmotically active metabolites. These biochemical response changes may confer adaptation to drought stress and improve the capacity of plants to withstand water-deficit conditions.

Investigation on the Absorption Kinetics of Chlorogenic Acid in Rats by HPLC

Jing Ren,Xuehua Jiang,Chenrui Li 대한약학회 2007 Archives of Pharmacal Research Vol.30 No.7

Chlorogenic acid (ChA), a major phenolic compound in the Flos Lonicerae, is widely used in the traditional Chinese medicine practice. The purpose of this study is to report the pharmacokinetic parameters of ChA in rats after oral administration and explore its absorption profile briefly. A two-compartment model was proposed and validated through the program to explain the apparent triphasic phenomenon of ChA in rats after intragastric administration. A rapid absorption and a relatively slow distribution followed by a slower elimination phase were observed. At the administered doses of 200, 400 and 600 mg/kg, the values of absorption halflife (t1/2 Ka) were 10.23, 18.66 and 28.13 min. The values of distribution half-life (t1/2α) were 12.35, 31.04 and 39.19 min. And the values of elimination half-life (t1/2β) were 231.64, 337.23 and 420.81 min. The volume of distribution at the three doses were 55.26, 35.56, 32.22 L/kg, respectively. The AUC0→∞ (area under the concentration–time curve) was not proportional to the administered dose. In the range of the doses examined, the absorption pharmacokinetics of ChA in rats was based on nonlinear kinetics.