http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
An Ye,Jiqiu Qi,Yanwei Sui,Fei Yang,Fuxiang Wei,Yezeng He,Qingkun Meng,Zhi Sun 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2018 NANO Vol.13 No.7
A solid-state energy storage device has been fabricated using FeCo-selenide nanosheet arrays as positive electrode and Fe2O3 nanorod as negative electrode. As an electrode material, the ternary FeCo-selenide nanosheet arrays supported by Ni foam show a highest specific capacitance of 978 F/g (specific capacity of 163 mAh/g) at 1 A/g and a superior cycle behavior of 81.2% are obtained after 5000 cycles at current density of 4 A/g. The asymmetric supercapacitor achieves the maximum energy density of 34.6Wh/kg at the power density of 759.6 W/kg. Furthermore, the superior cycling stability with 83% retention of initial capacitance after 5000 cycles further verify the practical applications of FeCo-selenide//Fe2O3 asymmetric supercapacitor. Meanwhile, the LED bulb and the light board of "CUMT" are lighted by connecting several capacitors to form a series circuit.
Rice Husk as a Food Carrier Forselective Enrichment of Tea Catechins
Meng Shi,Long-Yue Huang,Rong-Rong Han,Qiao Lin, Jian-Hui Ye,Yue-Rong Liang,Jian-Hui Ye 한국차학회 2015 한국차학회지 Vol.- No.S
The potentials of rice husk, oat bran and soya milk cake as food carriers for tea catechins(TC) were studied. Adsorption properties, contact time and temperature effects and the concentration of tea catechins, as well as digestive stability were investigated in this paper. The result showed that the adsorption capacity of rice husk for tea catechins was 32.04 mgg-1 which was 28.1 % and 17.7 % higher than those of oat bran and soya milk cake and no obvious adsorbability to caffeine was observed for these materials. The selectivity coefficient K of EGCg to TC for rice husk was 4.44 in comparison with 1.87 and 1.96 of oat husk and soya milk cake. This guarantees rice husk a selective food carrier to tea catechins with enrichment of EGCg. Also, 20 min contact time and tea extract concentration above 1.75 g L-1 are recommended in order to obtain a high loading amount of tea catechins onto rice husk, and low temperature is favorable for the adsorption processof tea catechins onto rice husk. Digestive study showed that combination of tea catechins with rice husk was propitious to increase the digestive stability of tea catechins in simulated gastrointestinal fluids. Thus, rice husk is a promising food carrier for tea catechins. Further studies would be focusing on the identification and separation of the functional constituent of rice husk and its interaction mechanism with tea catechins.
( Ye Gao ),( Lei Xin ),( Yi-tong Zhang ),( Xiao-rong Guo ),( Qian-qian Meng ),( Zhao-shen Li ),( Zhuan Liao ) 대한소화기학회 2021 Gut and Liver Vol.15 No.2
Background/Aims: Single-balloon enteroscopy (SBE) has been widely used in diagnosing small bowel disease. We conducted this study to systematically appraise its technical and clinical performance. Methods: Studies on SBE published by September 2018 were systematically searched. Technical and clinical performance data were collected and analyzed with descriptive or meta-analysis methods. Results: In total, 54 articles incorporating 4,592 patients (6,036 procedures) were included. Regarding technical parameters, the pooled insertion depths (IDs) for anterograde and retrograde SBE were 209.2 cm and 98.1 cm, respectively. The pooled retrograde ID in Asian countries was significantly greater than that in Western countries (129.0 cm vs 81.1 cm, p<0.001). The pooled anterograde and retrograde procedure times were 57.6 minutes and 65.1 minutes, respectively. The total enteroscopy rate was 21.9%, with no significant difference between Asian and Western countries. Clinically, the pooled diagnostic yield of SBE was 62.3%. Obscure gastrointestinal bleeding (OGIB) was the most common indication (50.0%), with a diagnostic yield of 59.5%. Vascular lesions were the most common findings in Western OGIB patients (76.9%) but not in Asian ones (31.0%). The rates of severe and mild adverse events were 0.5% and 2.5%, respectively. Conclusions: SBE is technically efficient and is clinically effective and safe, but total enteroscopy is relatively difficult to achieve with this technique. Etiologies of OGIB in Asian countries differ from those in Western countries. (Gut Liver 2021;15:262-272)
Ye, Shu,Ullah, Kefayat,Zhu, Lei,Meng, Ze-Da,Sun, Qian,Oh, Won-Chun The Korean Ceramic Society 2013 한국세라믹학회지 Vol.50 No.4
Multiwalled carbon nanotubes (MWCNTs) modified with Pd and $TiO_2$ composite catalysts were synthesized by the sol-gel method followed by solvothermal treatment at low temperature. The chemical composition and surface structure were characterized by X-ray diffraction (XRD), energy-dispersive X-ray (EDX) spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Photocatalytic recycle degradation experiments were carried out under both UV and visible light irradiation in the presence of MWCNT/$TiO_2$ and Pd-MWCNT/$TiO_2$ composites. As expected, the nanosized Pd-MWCNT/$TiO_2$ photocatalysts had enhanced activity over the non Pd treated MWCNT/$TiO_2$ material in the degradation of a rhodamine B (Rh.B) solution. An increase in photocatalytic activity was observed and attributed to an increase in the photo-absorption effect by MWCNTs and the cooperative effect of Pd and $TiO_2$ nanoparticles. According to the recycled results, the as-prepared Pd-MWCNT/$TiO_2$ sample had a good effect on it.
Meng Xiang,Chengjie Li,Lin Ye 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.50 No.-
Based on the industrialized reduced graphene oxide (RGO) product, MC nylon-6/RGO composites were insitu synthesized through anchoring effect of polyetheramine (PEA). Nylon-6 chains were confirmed tointercalate into RGO layers with high grafting ratio by formation of covalent bond and intermolecularhydrogen bond. By presence of PEA, RGO was well exfoliated by the nylon-6 chains and the average layerthickness increased remarkably. Moreover, the stacking of RGO layers was much more weakened andexhibited almost monolayer homogenous dispersion state in the matrix, resulting in the establishment ofthe electrically conductive network with a low threshold percolation.
Analysis of Operation Characteristics of a Diesel Generator Set with Constant‑Power Pulsed Load
Meng Shi,Puyu Wang,Jinquan Wang,Haichao Li,Ye Xu,Kefeng Huang,Jianke Li 대한전기학회 2019 Journal of Electrical Engineering & Technology Vol.14 No.6
To improve the power quality of a diesel generator set with a pulsed load in a microgrid, this paper studied the operation characteristics of the system and proposed pulsed load conditions for an actual project based on test data. For a low average pulse power and a high peak power, a new mathematical model of the pulsed load in diferent operation modes was proposed. Then, a simulation model of the microgrid was established in MATLAB/Simulink, and the operation of the system was studied considering changes in various pulsed load parameters (the peak power Pk, output duty cycle D and switching period Ts). It was verifed by tests that the simulation model is efective and can refect the operation of the system. Based on the simulation model, the operation characteristics of the system with a bivariate pulsed load were studied, and qualifcation conditions for the diesel generator set in an actual project were proposed.
Experimental Observations of Boiling and Flow Evolution in a Coiled Tube
Ye, P.,Peng, X.F.,Wu, H.L.,Meng, M.,Gong, Y. Eric The Society of Air-Conditioning and Refrigerating 2008 International Journal Of Air-Conditioning and Refr Vol.16 No.1
A sequence of visually experimental observations was conducted to investigate the flow boiling and two-phase flow in a coiled tube. Different boiling modes and bubble dynamical evolutions were identified for better recognizing the phenomena and understanding the two-phase flow evolution and heat transfer mechanisms. The dissolved gases and remained vapor would serve as foreign nucleation sites, and together with the effect of buoyancy, centrifugal force and liquid flow, these also induce very different flow boiling nucleation, boiling modes, bubble dynamical behavior, and further the boiling heat transfer performance. Bubbly flow, plug flow, slug flow, stratified/wavy flow and annular flow were observed during the boiling process in the coiled tube. Particularly the effects of flow reconstructing and thermal non-equilibrium release in the bends were noted and discussed with the physical understanding. Coupled with the effects of the buoyancy, centrifugal force and inertia or momentum ratio of the two fluids, the flow reconstructing and thermal non-equilibrium release effects have critical importance for flow pattern in the bends and flow evolution in next straight sections.
Meng, Ze-Da,Zhu, Lei,Ullah, Kefayat,Ye, Shu,Oh, Won-Chun Materials Research Society of Korea 2015 한국재료학회지 Vol.25 No.9
SnS-$TiO_2$ nanocomposites are synthesized using simple, cheap, and less toxic $SnCl_2$ as the tin (II) precursor. The prepared nanoparticles are characterized using powder X-ray diffraction (XRD), transmission electron microscopy (TEM), and UV-Vis diffuse reflectance spectra (DRS). The XRD and TEM results indicate that the prepared product has SnS nanoparticles and a grain diameter of 30 nm. The DRS demonstrate that SnS-$TiO_2$ possesses the absorption profile across the entire visible light region. The generation of reactive oxygen species is detected through the oxidation reaction from 1,5-diphenyl carbazide (DPCI) to 1,5-diphenyl carbazone (DPCO). It is found that the photocurrent density and photocatalytic effect increase with the modified SnS. Excellent catalytic degradation of Texbrite BA-L (TBA) solution is observed using the SnS-$TiO_2$ composites under visible light irradiation. It is proposed that both the strong visible light absorption and the multiple exciton excitations contribute to the high visible light photocatalytic activity.
Facile Preparation of Ag<sub>2</sub>S-CNT Nanocomposites with Enhanced Photo-catalytic Activity
Meng, Ze-Da,Sarkar, Sourav,Zhu, Lei,Ullah, Kefayat,Ye, Shu,Oh, Won-Chun The Korean Ceramic Society 2014 한국세라믹학회지 Vol.51 No.1
Here we report improved photo-catalytic effect of $Ag_2S$ under visible light using carbon nano-tubes (CNT) modified with $Ag_2S$ nanoparticles. The optical properties, structural properties and compositional analysis, as well as the photo-electrochemical properties of the prepared composites were investigated. It was found that the photocurrent density, and the photo-catalytic effect, was increased by modification of CNT in this way. Compared with the separate effects of $Ag_2S$ and CNT nanoparticles, the photocatalytic effect of CNT-modified-with-$Ag_2S$ composites, increased significantly due to a synergistic effect between the CNT and the $Ag_2S$ nanoparticles.
Meng, Ze-Da,Ullah, Kefayat,Zhu, Lei,Ye, Shu,Oh, Won-Chun The Korean Ceramic Society 2014 한국세라믹학회지 Vol.51 No.4
ZnS and $ZnS/TiO_2$ were prepared by chemical deposition. The prepared photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), and transmission electron microscopy (TEM). The generation of reactive oxygen species was detected by monitoring the oxidation reaction from 1,5-diphenyl carbazide (DPCI) to 1,5-diphenyl carbazone (DPCO). Excellent catalytic degradation of methylene blue (MB) solution was observed using the $ZnS/TiO_2$ composites during irradiation with visible light. The results show that the photocatalytic performance of $TiO_2$ nanoparticles is improved by loading with ZnS.