http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
LI Kunpeng,LIU Wei,LI Qunzhan,ZHAO Yunyun,HE Zhixin,SHI Haiou,JIN Shoujie,CHEN Guangzan 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
The rational use of regenerative braking energy for urban rail transit trains directly affects the voltage safety of the traction power supply system and the electric braking function of the train. It is also of great significance for the implementation of train traction energy saving. This paper proposes a scheme of train regenerative braking ground absorbing device based on super-capacitor energy storage. It adopts multiple modular Buck/Boost DC conversion topology to realize bidirectional control of electric energy and stabilize the secondary utilization of traction network voltage and regenerative electric energy. According to the scheme of this paper, the energy storage device was developed and verified in the engineering of the Guangzhou Line 6 main line traction substation. The test indicators have met the design expectations.
Yan Li,Naisen Yu,Haiou Li,Dedi Liu,Yunfeng Wu 대한금속·재료학회 2020 ELECTRONIC MATERIALS LETTERS Vol.16 No.6
In this paper, a novel individual multiple-junction network structure is fabricated using low temperature aqueous method. In comparison with the same growth method without NaF adding, the Fluorine doped ZnO photodetector presents multiplejunctionnetwork structure and ultraviolet (UV)/Blue dual band photoresponse performances. The results indicate the method can simultaneously promote self-assembled growth and improve the photoresponse properties. Moreover, it will provide a simple and low cost way to assemble multiple nanowires for photoresponse applications.
Kai Xu,Zhenchang Tang,Yan Zhang,Wanshu Li,Haiou Li,Lihui Wang,Li-Ming Liu,Hong-Hang Wang,Feng Chi,Xiaowen Zhang 한국물리학회 2019 Current Applied Physics Vol.19 No.10
Germanium dioxide (GeO2) aqueous solutions are facilely prepared and the corresponding anode buffer layers (ABLs) with solution process are demonstrated. Atomic force microscopy, X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy measurements show that solution-processed GeO2 behaves superior film morphology and enhanced work function. Using GeO2 as ABL of organic light-emitting diodes (OLEDs), the visible device with tris(8-hydroxy-quinolinato)aluminium as emitter gives maximum luminous efficiency of 6.5 cd/A and power efficiency of 3.5 lm/W, the ultraviolet device with 3-(4-biphenyl)-4-phenyl-5-tert-butylphenyl- 1,2,4-triazole as emitter exhibits short-wavelength emission with peak of 376 nm, full-width at halfmaximum of 42 nm, maximum radiance of 3.36 mW/cm2 and external quantum efficiency of 1.5%. The performances are almost comparable to the counterparts with poly (3,4-ethylenedioxythiophene):poly (styrenesulfonate) as ABL. The current, impedance, phase and capacitance as a function of voltage characteristics elucidate that the GeO2 ABL formed from appropriate concentration of GeO2 aqueous solution favors hole injection enhancement and accordingly promoting device performance.
Haiou Song,Zhijian Yao,Chendong Shuang,Aimin Li 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5
In order to quickly remove nitrate from aqueous solution, a magnetic strong base quaternary ammonium anion exchange resin (MAER) has been successfully designed and synthesized. The physicochemical properties of the MAER as well as its adsorption ones for nitrate removal were investigated in detail. A series of batch experiments were carried out to evaluate the effects of several factors on removal efficiency of nitrate, such as retention time, resin amount and initial nitrate concentration. Compared to the commercial Purolite A300 and D213, the equilibrium time for the adsorption process using MAER was only around 20 min, which is significantly less than that of two ones mentioned. Furthermore, the kinetic process of nitrate sorption on MAER could be well described by both pseudo-first-order and pseudo-second-order models. In addition, the results of batch experiments can be better fitted by the Langmuir and Freundlich adsorption isotherm models. Most importantly, the effects of competing ions on nitrate removal followed the order as: SO42- > Cl- > HCO3- . These results are of significance in guiding the development of novel resins with the rapid nitrate removal rate from aqueous solution, which would improve efficiency and save energy greatly.
Jie Bai,Liping Guo,Haiou Liang,Tong Xu,Chunping Li,Qingrun Meng,Huan Liu,Yarong Huang 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.12
Well-dispersed palladium nanoparticles (Pd NPs) were prepared under the condition that trisodium citrate was the reduction agent and polyvinylpyrrolidone (PVP) was the stabilizing agent via sol-gel process. By making good use of the advanced electrospinning technology we obtained Pd NPs/PVP composite nanofibers films. Optical properties were examined by UV-visible absorbance spectra (UV-vis) and Fourier transform infrared spectroscopy (FTIR). The morphology and distribution of Pd NPs in/on PVP matrix were characterized by scanning electron microscope (SEM)and transmission electron microscope (TEM). The results showed that Pd NPs presented as spherical spots and distributed in/on PVP nanofibers uniformly; their diameter was 4-10 nm and decreased with the increase of PVP. The as-prepared Pd NPs/PVP hybrid mats possess catalytic activity, stability and reusability, as verified by performance in Heck reaction.