http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Yang Songwei (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
Electrospun Ag‑Doped SnO2 Hollow Nanofbers with High Antibacterial Activity
Li Yang,Gao Songwei,Zhang Bin,Mao Huaming,Tang Xiaoning 대한금속·재료학회 2020 ELECTRONIC MATERIALS LETTERS Vol.16 No.3
With the continuous improvement in medical science in modern times, the spread of bacterial infection has become a matterof global concern. Therefore, the search for biological medical materials with antibacterial function has become a focusof intense research. In this work, pure SnO2 and Ag-doped SnO2 hollow nanofbers were fabricated by a combination of anelectrospinning method and a calcination procedure, and the Effects of the doped Ag on antibacterial activity and catalyticantibacterial activity were subsequently investigated. Through the process of high-temperature calcination, a high heatingrate would lead to the formation of a hollow tubular structure in SnO2 fbers, and Ag2O would be reduced to Ag0by a facileprocess with appropriate thermal treatment. Additionally, the existence of SnO2 as a tetragonal rutile structure was confrmed. On the basis of pure SnO2, doping with Ag greatly improved the antibacterial activity and catalytic antibacterial activity ofhollow nanofbers. The formation mechanism and the antibacterial mechanism of pure SnO2 and Ag-doped hollow nanofbersare also discussed. This study has broad application prospects for biological medicine.
-
Pang, Shengli,Su, Yanjing,Yang, Gongmei,Shen, Xiangqian,Zhu, Meng,Wu, Xiao,Li, Songwei,Yang, Xiaofen,Xi, Xiaoming Elsevier 2018 Ceramics international Vol.44 No.17
<P><B>Abstract</B></P> <P>Exploring advanced cathode materials that have high electrochemical activity and superior thermal compatibility with other components is of great importance for the application of intermediate-temperature solid oxide fuel cells. In the present study, influences of Ca doping on electrochemical and physicochemical properties of NdBa<SUB>1-x</SUB>Ca<SUB>x</SUB>CoCuO<SUB>5+δ</SUB> were studied systematically. A relatively low thermal expansion coefficient (16.8 × 10<SUP>−6</SUP> °C<SUP>−1</SUP>) was obtained for the Ca-doped sample over the temperature range of 25–800 °C. Moreover, Ca doping significantly enhanced the electrochemical performance of NdBa<SUB>1-x</SUB>Ca<SUB>x</SUB>CoCuO<SUB>5+δ</SUB>. The highest densities of power for NdBa<SUB>1-x</SUB>Ca<SUB>x</SUB>CoCuO<SUB>5+δ</SUB>-based single cells at the temperatures of 800 °C increased from 1.42 W cm<SUP>−2</SUP> for x = 0.0 to 1.84 W cm<SUP>−2</SUP> for x = 0.3. This increase in electrochemical performance of NdBa<SUB>1-x</SUB>Ca<SUB>x</SUB>CoCuO<SUB>5+δ</SUB> cathode with Ca doping can be ascribed to enhanced concentrations of oxygen vacancies and higher electrical conductivity.</P>
-
Temperature Effect Analysis of Large Segment Factory Manufacturing Alignment of Steel Box Girder
Deng Fuqiang,Wang Jinfeng,Yang Songwei,Xu Linghua,Xu Rongqiao 한국강구조학회 2024 International Journal of Steel Structures Vol.24 No.1
The construction of the cross-sea steel box girder bridge is gradually advancing and integrating, which particularly refl ects in the size of the bridge. The length of a single installation segment often exceeds 100 m. The alignment of the steel box girder is signifi cantly aff ected by the temperature eff ect during manufacturing. This paper investigates the impact of temperature gradient on corresponding alignment at the manufacturing stage for the large-segment steel box girder taking a large-span continuous steel box girder bridge as a case study. The inspection of temperature during the assembly procedure was carried out. After obtaining the data during welding, the infl uence of the temperature was evaluated using a fi nite element model. The results show that with the temperature gradient measured, the defl ection of the second suspension of the mid-span reaches 10.9 mm and the defl ection of the cantilever end reaches 17.1 mm, respectively. The deformation conforms to the code specifi cations when considering the infl uence of the temperature gradient eff ect. The corresponding pre-camber value should be set for the large segments assembled outdoor. At the same time, welding operation should be carried out under the preset temperature diff erence to partially eliminate the impact of temperature gradient.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
