http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Zhan-Fang Sun 영남대학교 중국연구센터 2012 중국과 중국학 Vol.16 No.-
지난 10년 동안 고도성장을 거두고 있는 중국은 국제항공 운송협회(IATA)의 통계에 따르면 미국에 이어 세계 2위의 항공운송시장으로 발전하였다. 매년 많은 외국 항공사들이 중국시장에 진출하고 있으며, 중국의 항공운송시장은 갈수록 경쟁이 치열해지고 있다. 무한경쟁이 펼쳐지고 있는 항공운송시장에서 경쟁력을 강화하기 위해 항공사의 인적자원관리에 대한 필요성이 커지고 있으며, 특히 항공사 직원의 직무만족도 제고를 통해 서비스품질을 높임으로써 기업의 경쟁력을 강화하고 있다. 본 연구에서는 항공사 직원의 조직지원인식이 조직신뢰와 직무만족에 미치는 영향을 분석하였다. 중국 상해에 있는 3개 항공사 직원을 대상으로 설문조사를 진행하였으며 유효 설문조사 127건을 대상으로 SPSS17를 이용하여 실증 분석하였다. 분석결과 항공사 직원의 조직지원인식은 조직신뢰와 직무만족에 대해 부분적으로 유의적인 양(+)의 영향을 미치는 것으로 나타났으며; 조직신뢰의 직무만족에 대한 영향 또한 양(+)의 영향을 미치는 것으로 나타났다. 본 연구를 통해 다음과 같은 시사점을 도출할 수 있다. 첫째, 항공사는 기업의 경쟁력 제고를 위해 보다 강력한 조직지원이 필요하다. 둘째, 항공사는 직원의 조직에 대한 신뢰도를 높이기 위해 직원에 대한 종합적인 관리가 필요하다. 셋째, 기업은 항공사 직원의 직무만족도가 여타 업종과 비교할 때 서비스품질에 미치는 영향이 보다 직관적임을 인식할 필요가 있으며, 따라서 기업은 더욱 주의를 기울일 필요가 있다.
Properties of a CdZnO/ZnO Multiple Quantum-Well Light-Emitting Diode
Zhan-Hui Liu,Li-Li Zhang,Qing-Fang Li,Rong Zhang,Zi-Li Xie,Xiang-Qian Xiu,Bin Liu 한국물리학회 2016 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.69 No.7
A CdZnO/ZnO multiple quantum-well light-emitting diode (LED) structure was successfully grown by using plasma-assisted molecular beam epitaxy on a p-GaN template that had been grown by using metal-organic chemical-vapor deposition on a c-sapphire substrate. The properties of the sample were characterized by using high-resolution X-ray diffraction, transmission electron microscopy, and temperature-dependent photoluminescence measurements. The light output performance of the CdZnO/ZnO QW LED device was also investigated in detail by using I-V and electroluminescence spectral measurements. The characterization showed that our CdZnO/ZnO QW LED structure had good crystalline quality and weaker carrier localization. Owing to the heterojunction structure, the I-V curve indicated that the LED device had a higher turn-on voltage and series resistance. The EL measurement demonstrated that for our LED device’s optoelectronic characteristic, the carrier-screening effect played the dominant role in the emission-energy blue-shift mechanism, and the broadening of the emission energy width was mainly ascribed to the band-filling effect. Without a special heat sinking, the L-I curve exhibited slight efficiency droop after 30 mA.
Xi Fang,Gaofeng Zhan,Jie Zhang,Hui Xu,Bin Zhu,Yimin Hu,Chun Yang,Ailin Luo 대한정신약물학회 2019 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.17 No.2
Objective: Patients with chronic neuropathic pain (CNP) have a higher incidence to develop depression. However, its pathogenesis has not yet been fully elucidated. Here we aimed to investigate the role of inflammatory cytokines in CNP-related anhedonia, which is a core symptom of depression, and to explore the effects of ketamine and parecoxib on pain and anhedonia. Methods: A rat model of spared nerve injury (SNI) was constructed to mimic CNP. Hierarchical cluster analysis of sucrose preference test (SPT) was applied to classify the SNI rats into anhedonia susceptible and unsusceptible. Inflammatory cytokines in medial prefrontal cortex (mPFC) of brain, serum and L2-5 spinal cord were measured. Moreover, effects of ketamine or parecoxib on mechanical withdrawal test (MWT) and SPT in anhedonia susceptible rats were detected. Results: Tumor necrosis factor (TNF)- was increased in mPFC, serum and and spinal cord of anhedonia susceptible rats. Furthermore, anhedonia susceptible and unsusceptible rats both increased the interleukin (IL)-1 level in mPFC, serum and spinal cord. IL-6 was altered in serum and spinal cord, but not in mPFC. IL-10 was significantly altered in mPFC and serum, but not in spinal cord. Additionally, ketamine treatment significantly attenuated the decreased results of MWT and SPT in anhedonia susceptible rats, and that parecoxib significantly improved the MWT score, but failed to alter the result of SPT. Conclusion: These findings suggest that abnormalities in inflammatory cytokines confer susceptible to anhedonia in a rat model of SNI. Ketamine, a fast-acting antidepressant, has pharmacological benefits to alleviate pain and anhedonia symptoms.
Minireview of potential applications of hydrochar derived from hydrothermal carbonization of biomass
June Fang,Lu Zhan,옥용식,Bin Gao 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.57 No.-
This review provides a brief overview of the potential applications of hydrochar and its derivatives. Itfirstsummarized the key processes of hydrothermal carbonization (HTC) of biomass and basic properties ofthe resulting hydrochar. Most of the efforts of this review is then on reviewing the potential applicationsof hydrochar in variousfields including environment, energy, adsorbent and medical applications. It alsodiscusses different modification and activation methods to produce hydrochar-based engineered carbonmaterials for enhanced performances in those applications, particularly with respect to their applicationas low-cost adsorbents for the removal of heavy metals, organics, phosphate and pathogens.
A study of microstructures and mechanical properties of laser welded joint in GH3030 alloy
Tao Zhan,Fang Chai,Juan Zhao,Fei Yan,Wei Wang 대한기계학회 2018 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.32 No.6
In this paper, we represent experimental laser welding of GH3030 alloy. The microstructure and mechanical properties of laser welded joints were investigated using an optical microscope, scanning electron microscope, energy diffraction spectrum and other methodologies. The results demonstrated that the weld primarily involved slender dendrites together with a small number of equiaxial crystals. The occurrence of porosities was mainly associated with the composition of the material itself. The cracks in the HAZ were induced by lowmelting-point eutectic phases that formed during laser welding. The segregation of the alloying elements in the matrix induced the variation of the performance within the joint. The average strength of welded joints was 646 MPa, 97.6 % of that of the base metal. Formation of inclusions and micropores in the fusion zone weakened the joint strength greatly.
Alu Tandem Sequences Inhibit GFP Gene Expression by Triggering Chromatin Wrapping
Xiu Fang Wang,Xiao Yan Wang,Jing Liu,Jing Jing Feng,Wen Li Mu,Xiao Juan Shi,Qin Qing Yang,Xiao Cui Duan,Ying Xie,Zhan Jun Lu 한국유전학회 2009 Genes & Genomics Vol.31 No.3
Alu elements belonging to the short interspersed nuclear elements (SINE) of repetitive elements are present in more than one million copies which altogether represent 10% of the whole human genome. In this study, the roles of Alu tandem sequences in the process of GFP gene (GFP) expression and packing into chromatin of its DNA were studied. To detect the effect of Alu repeats on gene expression, different copies of Alus were inserted GFP downstream respectively in pEGFP-C1 vector. We found that Alu sequences decreased the amount of GFP transcription, the percentage of GFP positive cells and the accessibility to DNase I in length-dependent manner. Inserting Alu caused the production of higher-molecular-mass RNA, indicating Alu sequence did not induce premature transcriptional termination. Tight packing chromatins keep silent and resist to DNase I digestion, which is a general phenomenon. We suggested that head and tail tandem Alu sequences suppressed GFP expression in length dependent manner by triggering chromatin packing.
Comparison of long-term behavior between prestressed concrete and corrugated steel web bridges
Yulin Zhan,Fang Liu,Zhongguo John Ma,Zhiqiang Zhang,Zengqiang Duan,Ruinian Song 국제구조공학회 2019 Steel and Composite Structures, An International J Vol.30 No.6
Prestressed concrete (PC) bridges using corrugated steel webbing have emerged as one of the most promising forms of steel-concrete composite bridge. However, their long-term behavior is not well understood, especially in the case of largespan bridges. In order to study the time-dependent performance, a large three-span PC bridge with corrugated steel webbing was compared to a similar conventional PC bridge to examine their respective time-dependent characteristics. In addition, a threedimensional finite element method with step-by-step time integration that takes into account cantilever construction procedures was used to predict long-term behaviors such as deflection, stress distribution and prestressing loss. These predictions were based upon four well-established empirical creep prediction models. PC bridges with a corrugated steel web were observed to have a better long-term performance relative to conventional PC bridges. In particular, it is noted that the pre-cambering for PC bridges with a corrugated steel web could be smaller than that of conventional PC bridges. The ratio of side-to-mid span has great influence on the long-term deformation of PC bridges with a corrugated steel web, and it is suggested that the design value should be between 0.4 and 0.6. However, the different creep prediction models still showed a weak homogeneity, thus, the further experimental research and the development of health monitoring systems are required to further progress our understanding of the long-term behavior of PC bridges with corrugated steel webbing.
Hao Yi,Fang Zhuo,Yu Li,Yanjun Zhang,Wenda Zhan 전력전자학회 2013 JOURNAL OF POWER ELECTRONICS Vol.13 No.5
Instead of extracting every selected harmonic component, the current reference of selective active power filter (APF) can be also obtained by filtering out the fundamental component from distorted load current for computation efficiency. This type of mixed current reference contains kinds of harmonic components and easily involves noises. In this condition, selective harmonic compensation must be realized by the current controller. With regard that selectivity is the most significant feature of controller, this paper presents specific comparison analysis between two types of resonant controllers: proportional-resonant (PR) controller and vector-resonant (VR) controller. The comparison analysis covers the relations, performances, and stability of both controllers. Analysis results conclude that the poorer selectivity of the PR controller could be relatively improved, but limitations from system stability make the improvement hardly realized. By contrast, the VR controller exhibits excellent selectivity and is more suitable for selective APF with mixed current reference. Experimental results from laboratory prototype validate the reasonability of analysis. And the features of each resonant controller are concluded.
Guojun Liu,Fang He,Yan Li,Xinbo Li,Hong Zhao,Conghui Wang,Conghong Zhan,Chunxiu Tang 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2019 NANO Vol.14 No.8
Based on the liquid-phase reduction mechanism, a controllable synthesis method, which uses piezoelectric-actuated high-frequency vibration self-circulating microfluidic reactor, to prepare silver nanoparticles is proposed. Firstly, the synthesis mechanism of silver nanoparticles and the working principle of the microfluidic reactor were analyzed. Then, in order to study and explore the influence of self-circulating and high frequency vibration on the synthesis of silver nanoparticles, a series of related synthesis experiments were carried out. The synthesized silver nanoparticles were characterized by UV-Visible spectroscopy and transmission electron microscopy. The effects of micropump driving voltage and high-frequency vibration on the synthesis of silver nanoparticles were analyzed. The experiment results show that when the silver nanoparticles were synthesized using piezoelectric-actuated high-frequency vibration self-circulating microfluidic reactor, the higher the driving voltage of the circulating reflux micropump, the faster the vortex rotation speed in the mixing pool and the more uniform the reagent reaction. Besides, high-frequency vibration can suppress the aggregation of silver nanoparticles, and balance the growth environment of particles, which is beneficial to the formation of silver nanoparticles with good monodispersity, high sphericity and small size deviation.