韩国汉语学习者的礼貌用语教学研究

张蕊 ( Zhang¸ Rui ) 중국어문학회 2021 中國語文學誌 Vol.- No.74

Chinese and Korean have differences in traditional culture, way of thinking, psychological quality and customs due to their different nationalities. These differences are also reflected in the polite expressions that reflect social etiquette norms. This paper first combed the definition of Chinese politeness and politeness principles, and analyzed the differences and similarities between Chinese and Korean in politeness terms through specific examples. Secondly, a questionnaire survey is conducted among Korean undergraduates who have different degrees of Chinese learning experience. It analyzed the misuse and characteristics of Korean students’ Polite expressions, and understands the interference factors in the acquisition of polite expressions “Depreciate yourself and respect others” is one of the five principles of polite language in Chinese, and it is also the center of the five principles, and is an important connotation of Chinese culture. Chinese polite language requires high vocabulary changes. Different pragmatic phenomena will produce different polite effects. In the choice of wording, full consideration should be given to the identity, age, and occasion of both parties in the conversation. On the one hand, Korean uses a respectful vocabulary system to highlight the speaker’s respect for the other party. On the other hand, Korean has a very strict honorific style, which expresses respect through a grammatical system. At the end of the thesis, three suggestions for polite language teaching were put forward, and the teaching plan was designed. First, understand the obstacles to students’ acquisition and increase the importance of polite language teaching. Second, pay attention to the understanding and application of pragmatic functions, and emphasize cultural cognition in combination with specific scenarios. Third, make up for the lack of teaching and teaching materials, and conduct polite language teaching in stages.

Study and Design of High Strength and Low Heat Generation Polymer Composites by Molecular Dynamics Simulation

Rui-Rui Zhang,Bin Wu,Peng Chen,Jia-Sheng Qian 한국고분자학회 2020 폴리머 Vol.44 No.6

The molecular dynamics simulation was used to study and design a polymer composites system with excellent mechanical strength and less heat generation in a dynamic process. A series of system factors such as filler loading, surface modification onto filler, and network of cross-linking filler particles on mechanical and heat generation of polymer composites are systematically considered. It is found that the surface grafting onto fillers can restrain the heat generation of polymer composite in the dynamic process, while it shows less effect on the mechanical property. A network of cross-linking filler particles can be fabricated by a combination of grafting chains onto fillers. By filling such a network into the polymer, the mechanical and heat generation properties of polymer composites are significantly improved. Simulation results can help experimental fabrication of polymer composites with excellent mechanical and heat generation properties.

Historical Long-term Exposure to Pentachlorophenol Causing Risk of Cancer - A Community Study

Zheng, Rui-Zhi,Zhang, Qing-He,He, Yi-Xin,Zhang, Qian,Yang, Lin-Shen,Zhang, Zhi-Hua,Zhang, Xiu-Jun,Hu, Jing-Ting,Huang, Fen Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.2

Background: Pervious studies suggested occupational workers exposure to pentachlorophenol (PCP) might contribute to increased risk of cancer. However, few studies have focused on associations between PCP and cancer risk at the community level. Objective: The present study was to explore the cancer risk for the community population living long-term in a PCP contaminated area. Methods: All the cancer cases diagnosed in 2009-2011 in Tongling City were collected. The cancer patients' residencies were geo-referenced in each district. The historical PCP usage for each district of Tongling was calculated as the PCP pollution index, which was further used to divide into PCP exposure categories. Standardized rate ratios (SRRs) of cancer incidence were applied to detect the cancer risk as exposure grade elevated. Correlation analysis was performed to analyze the relationship between PCP pollution and cancer incidence. Results: A total of 5,288 cancer cases (3,451 male and 1,837 female) were identified. PCP usage was correlated with the incidence of leukemia (r=0.88, P=0.002) for males, and with cancer of the esophagus for males (r=0.83, P=0.008) and females (r=0.71, P=0.020). Compared with the low exposure category, significant SRRs for total cancer sites was obtained for high PCP exposure category (SRR=1.61, 95%CI=1.59-1.62). Most SRR values of the cancer sites were significantly increased as exposure grade elevated and exposure time extended. Conclusion: The present study found that community residents living in the PCP contaminated area had increased risk of cancers. Leukemias, lymphomas and nasopharyngeal and esophageal cancers are most possibly associated with PCP exposure.

A magnetostrictive self-powered biosensor based on Au-BaTiO3-FeGa & PDMS

Qiang Zhang,Meng Xu,Yan Liu,Chunyan Zhang,Rui Zhang,Zhiyuan Fu,Jianlong Ji,Riguang Zhang,Shengbo Sang 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.117 No.-

Piezoelectric flexible sensors have been used to detect biomolecules such as sweat and glucose because oftheir passive, simple structure and high sensitivity. This paper proposes a novel flexible piezoelectric Au-BaTiO3-FeGa & PDMS biosensor in which magnetostrictive deformation amplifies the surface stress generatedby biomolecules combining on the thin film. The modification process of bovine serum albumin(BSA) binding with the sensor was initially determined by the first principles approach. Then, the sensingmechanism was verified by finite-element simulation. Based on the simulation results, flexible Au-BaTiO3-FeGa & PDMS biosensors were prepared, modified, and measured. The structure, modification,and detection of the sensors were analyzed by digital microscopy, Fourier transform infrared spectrometry(FTIR), atomic force microscopy (AFM), and scanning electron microscopy (SEM). The responses ofthe biosensors detecting different BSA solution concentrations under magnetic fields were then investigated. Experimental results indicate that the biosensor has the highest sensitivity under a magnetic fieldof 30 mT.

Dirac semimetal-enabled multi-bit coding metasurface for dynamic manipulation of terahertz beams

Zhang Yonggang,Yin Kehao,Liang Lanju,Yao Haiyun,Yan Xin,Hu Xiaofei,Huang Chengcheng,Qiu Fu,Zhang Rui,Li Yuanping,Wang Yaru,Li Zhenhua,Wang Ziqun 한국물리학회 2024 Current Applied Physics Vol.58 No.-

In this study, a switchable multi-bit coding metasurface that is applied under a terahertz (THz) frequency by adjusting the Fermi level (EF) of Dirac semimetals (DSMs) is proposed. At a EF of 0.2 eV, a 1-bit coding metasurface can be applied in the 2.58–2.62 THz. At 0.3 eV, a 3-bit coding metasurface is realized at 1.88 THz, and at 0.05 eV, the phase of the coding units coincides in the 1.5–3 THz. So, different functions of the metasurface can be realized. The proposed coding metasurfaces has promising applications in terahertz communication.

PIFA using series-resonant feed structure for wide-band operations

Rui Zhang,Yang Liu,Hyeonghun Kim,Hyeongdong Kim IET 2015 Electronics letters Vol.51 No.8

<P>A newly designed two-dimensional planar inverted-F antenna (PIFA) that achieves a substantially enhanced dual-band impedance bandwidth is presented. It employs a proposed series-resonant feed structure, which consists of two series resonators. The enhanced dual-band impedance bandwidth is realised based on the appropriate increase of the impedance levels of the two series resonators. This increase is sufficient to cover wide use in mobile handsets of 698-960 MHz for the low band and 1710-2690 MHz for the high band with a VSWR <; 3.</P>

The cytoprotective effect of butin against oxidative stress is mediated by the up‐regulation of manganese superoxide dismutase expression through a PI3K/Akt/Nrf2‐dependent pathway

Zhang, Rui,Chae, Sungwook,Lee, Jun Hwa,Hyun, Jin Won Wiley Subscription Services, Inc., A Wiley Company 2012 Journal of cellular biochemistry Vol.113 No.6

<P><B>Abstract</B></P><P>Butin (7,3′,4′‐trihydroxydihydroflavone), a flavonoid with antioxidant activity, was recently reported to protect cells against H<SUB>2</SUB>O<SUB>2</SUB>‐induced apoptosis, oxidative DNA damage and oxidative mitochondrial dysfunction. The objective of the present study was to elucidate the mechanism by which butin protects mitochondria. The antioxidant function of manganese superoxide dismutase (Mn SOD) is important in preventing oxidative stress. While exposure to H<SUB>2</SUB>O<SUB>2</SUB> reduced the expression of Mn SOD in Chinese hamster lung fibroblast (V79‐4), the addition of butin restored Mn SOD expression at both the mRNA and protein levels, resulting in increased Mn SOD activity. The transcription factor NF‐E2‐related factor 2 (Nrf2) regulates Mn SOD gene expression by binding to the antioxidant responsive element (ARE). Butin enhanced the nuclear translocation and ARE‐binding activity of Nrf2, which was decreased by H<SUB>2</SUB>O<SUB>2</SUB>. The siRNA‐mediated knockdown of Nrf2 attenuated butin‐induced Mn SOD expression and activity. Further, phosphatidylinositol 3‐kinase (PI3K)/protein kinase B (PKB, Akt) contributed to the ARE‐driven Mn SOD expression. Butin activated PI3K/Akt and exposure to either LY294002 (a PI3K inhibitor), Akt inhibitor IV (an Akt‐specific inhibitor), or Akt siRNA suppressed the butin‐induced activation of Nrf2, resulting in decreased Mn SOD expression and activity. Finally, the cytoprotective effect of butin against H<SUB>2</SUB>O<SUB>2</SUB>‐induced cell damage was suppressed by the siRNA‐mediated knockdown of Mn SOD. These studies demonstrate that butin attenuates oxidative stress by activating Nrf2‐mediated Mn SOD induction via the PI3K/Akt signaling pathway. J. Cell. Biochem. 113: 1987–1997, 2012. © 2012 Wiley Periodicals, Inc.</P>

Triple-band ground radiation antenna for GPS, WiFi 2.4 and 5 GHz band applications

Zhang, Rui,Kim, Hyung-Hoon,Kim, Hyeondong IET 2015 Electronics letters Vol.51 No.25

<P>A compact triple-band ground radiation antenna for GPS, WiFi 2.4 and 5 GHz band operations in mobile terminals is proposed. Within a considerably small area of 12 × 6 mm, by employing the inductive excitation concept of characteristic radiation modes on a mobile terminal chassis, impedance bandwidths of 21, 210, and 1820 MHz are achieved, covering the GPS, WiFi 2.4 and 5 GHz bands, respectively, at VSWR <2.</P>

RNA-seq for comparative transcript profiling in leaves of strawberry seedlings under salinity stress

Zhang Rui,Du Qiuli,Zhao Wenzhe,Yang Long,Li Dong-mei,Chen Xiude,Xiao Wei,Fu Xiling,Yang Chao,Li Ling 한국식물생명공학회 2023 Plant biotechnology reports Vol.17 No.1

As a major economic crop, strawberry (Fragaria × ananassa Duch.) has been widely planted in the world because of their adaptability and high economic efficiency. In the process of strawberry production, the traditional techniques of furrow irrigation, irrigating irrigation and water and fertilizer management are still relatively common, resulting in secondary salinization of the soil and an imbalance of nutrient ratio, resulting in a decrease in strawberry yield and quality. A total of 2334, 2718 differentially expressed genes (DEGs) were identified in the 3-day, 6-day salt-treated leaf tissues compared with the controls, respectively. Based on the analysis of DEG function annotation and enrichment, a pattern of strawberry leaves response to NaCl stress was proposed. The processes related to plant hormone signal and lipid metabolism pathway were noted in the response of strawberry leaves to NaCl. Our transcriptome data provides valuable insights into genes involved in the growing process of strawberry seedlings under salt stress, and may help in developing seedlings with enhanced responses to salt stress in the years to come.

Effect of capacitor position on radiation patterns of ground radiation antenna

Rui Zhang,Yang Liu,Hyeongdong Kim IET 2015 Electronics letters Vol.51 No.23

<P>The radiation-pattern variations of a ground radiation antenna are investigated. The series capacitor connected in the antenna radiation loop is successively placed in two different positions while the radiation patterns are respectively observed. The simulation and experimental results indicate that the radiation patterns are significantly changed in accordance with the capacitor's position. This study can be applied to implementing a radiation-pattern-reconfigurable GPS antenna.</P>