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 : Guoqiang Tan (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
Weichuan Tan,Shanlin Du,Yunfei He,Guoqiang Lv,Wenhui Ma,Aimin Xing,Jie Huang 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.8
The structure of the gas distributor was optimized to enhance the reaction rate of direct synthesis of siliconemonomers in a fluidized bed. In this work, the opening rate range was selected by the critical pressure drop ratio, andthe influences of opening ratio and the holes quantities of distribution plate on the synthesis process were systematicallystudied by numerical simulation approaches. The fluidization velocity was simplified by Reylows’ and Archimedes’ criterionnumbers. To better predict the gas-solid fluidization characteristics in the bed, the drag model was modified by thecritical fluidization velocity. In addition, the distributor performance was investigated from the perspectives of solidphase volume fraction, pressure drop change, bubble behavior and power spectrum analysis, etc. The results show thatthe distribution plate pressure drop ratio is about 0.11679 at the opening rate of 0.53%, which meets the design criterionof reducing the dissipation while increasing the fluidized quality. A high frequency and a low amplitude arise at theopening rate of 0.53%, indicating the corresponding favorable efficiency of heat and mass transfer. The maximum fluctuationrange of the solid phase distribution with =0.53% is only 1.7%, indicating that the inhomogeneity of the solidphase fraction distribution is the lowest, and the fluidization stability is improved by about 30%. Consequently, =0.53%is proposed as the best distributor configuration and enhanced the monomer synthesis efficiency.
-
Yong Wang,Jianfeng Huang,Guoqiang Tan,Jing Huang,Lili Zhang 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2015 NANO Vol.10 No.1
C-doped BiVO4 with self-heterostructure were synthesized via a facile one-step microwave-hydrothermal route at different reaction temperatures and reaction times. The crystal structure,morphology and photophysical properties of the samples were characterized by X-ray diffraction (XRD), field-emission scanning electron microscope (FE-SEM) and UV-Vis techniques. The photocatalytic properties of the samples were evaluated by the decolorization of rhodamine B under ultraviolet light or simulated visible light irradiation. It was found that pure BiVO4 polyhedrons had a monoclinic structure while C-doped BiVO4 had self-heterostructure with both monoclinic and tetragonal phase. This mixed-phase structure exhibited higher activity than monoclinic structure under ultraviolet light irradiation while monoclinic C-doped BiVO4 had better photocatalytic property under simulated visible light irradiation. The selectivity of the light source with different C-doped BiVO4 self-heterostructures was also discussed in this work.
-
Study on the Energy Spectrum Response of a CdZnTe Detector
Yuandong Li,Liangquan Ge,Kun Sun,Shangqing Sun,Guoqiang Zeng,Chengjun Tan 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.76 No.9
In order to study the energy spectrum response of a CdZnTe detector, we firstly measured the temperature dependence and the bias dependence of the main characteristic parameters for both a quasi-hemispherical detector and a CAPtureTM plus detector. Secondly, we designed a low-noise readout circuit for the CdZnTe detector and measured the noise. Finally, we evaluated the energy spectrum response of the detector to different radioactive sources at different temperatures by connecting the detector to the readout circuit. The research showed that both detectors had low leakage current and junction capacitance, as well as good stability in temperature and bias; the quasi-hemispheric detector had a smaller leakage current and junction capacitance compared to the CAPtureTM plus detector; under zero input capacitor, the noise of the readout circuit was 612e, with the noise slope being 5.44e/pF; at room temperature(20 °C), the energy resolutions of the detector reached 3.84% and 1.36% for X-rays from 241Am (59.5 keV) and gamma-rays from 137Cs (662 keV), respectively; the signal-noise ratio of the output signal reached 31:1 with the rise time being 90 ns; at low temperature, the energy resolution reached 3.41% for the X-rays from 241Am (59.5 keV); the detector achieved an excellent spectrum response and was able to distinguish clearly the energy peaks of 152Eu and 226Ra.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
