http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
TiO2ecarbon nanotube composites for visible photocatalysts - Influence of TiO2 crystal structure
Mu Yao Guo,Fangzhou Liu,Yu Hang Leung,Alan Man Ching Ng,Aleksandra B. Djurišić,Wai Kin Chan 한국물리학회 2013 Current Applied Physics Vol.13 No.7
We investigated the influence of the crystal structure of TiO2 and the use of different TiO2 precursors on the properties and photocatalytic activity of carbon nanotube (CNTs)etitania composites. We found that the crystal structure and properties of starting TiO2 nanomaterial significantly affected the effect of CNTs incorporation on the photocatalytic activity under simulated solar and visible light illumination (simulated solar illumination with UV-blocking filter). In case of significant photocatalytic activity under visible light illumination (anatase TiO2), likely due to the presence of native defects, composites exhibited lower activity under visible illumination only, but higher activity under simulated solar illumination. The opposite trends were observed for P25 (anatase þ rutile) and rutile TiO2, where incorporation of CNTs resulted in a significant increase of photocatalytic activity under visible illumination. Thus, control over crystal structure and native defects is essential for the development of efficient visible light activated photocatalysts.
Mixed Reinforcement Learning for Efficient Policy Optimization in Stochastic Environments
Yao Mu,Baiyu Peng,Ziqing Gu,Shengbo Eben Li,Chang Liu,Bingbing Nie,Jianfeng Zheng,Bo Zhang 제어로봇시스템학회 2020 제어로봇시스템학회 국제학술대회 논문집 Vol.2020 No.10
Reinforcement learning has the potential to control stochastic nonlinear systems in optimal manners successfully. We propose a mixed reinforcement learning (mixed RL) algorithm by simultaneously using dual representations of environmental dynamics to search the optimal policy. The dual representation includes an empirical dynamic model and a set of state-action data. The former can embed the designer’s knowledge and reduce the difficulty of learning, and the latter can be used to compensate the model inaccuracy since it reflects the real system dynamics accurately. Such a design has the capability of improving both learning accuracy and training speed. In the mixed RL framework, the additive uncertainty of stochastic model is compensated by using explored state-action data via iterative Bayesian estimator (IBE). The optimal policy is then computed in an iterative way by alternating between policy evaluation (PEV) and policy improvement (PIM). The effectiveness of mixed RL is demonstrated by a typical optimal control problem of stochastic non-affine nonlinear systems (i.e., double lane change task with an automated vehicle).
Yao-Chi Zeng,Gui-Ping Mu,Shu-Fen Huang,Xue-Hui Zeng,Hong Cheng,Zhong-Xin Li 한국영양학회 2014 Nutrition Research and Practice Vol.8 No.4
BACKGROUND/OBJECTIVES: The objectives of this study were to investigate the effects of lycopene on the migration, adhesion, tube formation capacity, and p38 mitogen-activated protein kinase (p38 MAPK) activity of endothelial progenitor cells (EPCs) cultivated with high glucose (HG) and as well as explore the mechanism behind the protective effects of lycopene on peripheral blood EPCs. MATERIALS/METHODS: Mononuclear cells were isolated from human peripheral blood by Ficoll density gradient centrifugation. EPCs were identified after induction of cellular differentiation. Third generation EPCs were incubated with HG (33 mmol/L) or 10, 30, and 50 μg/mL of lycopene plus HG. MTT assay and flow cytometry were performed to assess proliferation and apoptosis of EPCs. EPC migration was assessed by MTT assay with a modified boyden chamber. Adhesion assay was performed by replating EPCs on fibronectin-coated dishes, after which adherent cells were counted. In vitro vasculogenesis activity was assayed by Madrigal network formation assay. Western blotting was performed to analyze protein expression of both phosphorylated and non-phosphorylated p38 MAPK. RESULTS: The proliferation, migration, adhesion, and in vitro vasculogenesis capacity of EPCs treated with 10, 30, and 50 μg/mL of lycopene plus HG were all significantly higher comapred to the HG group (P < 0.05). Rates of apoptosis were also significantly lower than that of the HG group. Moreover, lycopene blocked phosphorylation of p38 MAPK in EPCs (P < 0.05). To confirm the causal relationship between MAPK inhibition and the protective effects of lycopene against HG-induced cellular injury, we treated cells with SB203580, a phosphorylation inhibitor. The inhibitor significantly inhibited HG-induced EPC injury. CONCLUSIONS: Lycopene promotes proliferation, migration, adhesion, and in vitro vasculogenesis capacity as well as reduces apoptosis of EPCs. Further, the underlying molecular mechanism of the protective effects of lycopene against HG-induced EPC injury may involve the p38 MAPK signal transduction pathway. Specifically, lycopene was shown to inhibit HG-induced EPC injury by inhibiting p38 MAPKs.
Rapid preparation and characterization of chitosan nanoparticles for oligonucleotide
Mu-hua Cheng,Yao-xiong Huang,Han-jian Zhou,Zhi Liu,Jian-fang Li 한국물리학회 2010 Current Applied Physics Vol.10 No.3
Chitosan is regarded as one of the potential candidates as a gene carrier. However, the poor solubility of chitosan is the major limiting factor in its utilization as a gene carrier. The purpose of this study was to simplify the method of preparing the nanoparticles of chitosan linked with antisense oligonucleotide (asON). The main step was preparing the derivatives of chitosan phosphate (CSP) in order to easily dissolve in aqueous solution. The nanoparticles were formed using a simple mixed method for CSP and asON, and the nanoparticle’s forming condition was optimized so that the nanoparticle’s characterization could be examined. Results showed that it was simple to make the nanoparticles under the optimal condition of 2:1 M proportion of CSP and asON. The size of the nanoparticles was 102.6 ± 12.0 nm, its zeta potential was 1.45 ± 1.75, and the encapsulated ratio of the chitosan crosslinked the asON was 87.6 ± 3.5%. The infrared spectra and electron microscope displayed that chitosan may combine with the asON to form equirotal nanoparticles. In conclusion, it was simple and feasible to form chitosan nanoparticles for asON using the CSP, and the CSP can efficiently encapsulate asON.
Yong Yao,Li-Hua Ma,Yu-Xiao Liu,Deng-Mu Cheng,Yi Qiu,Li-Sha Wu,Yun Qi 한국물리학회 2016 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.68 No.5
The thermodynamic properties of small metallic superconducting grains are affected by fluctuations in the order parameter and the level statistics, especially in the critical region. Here, the static path approximation was applied to deal with the fluctuations and the thermodynamic contribution of quasiparticles, and random matrix theory was applied to deal with level statistics. The specific heats were calculated numerically in the cases of even and odd number of electrons and different spins.
Yuping Zhao,Xiaoqing Mu,Yao Nie,Yan Xu 한국식품과학회 2014 Food Science and Biotechnology Vol.23 No.6
A new, rapid spectrophotometric quantitativedetermination method for γ-decalactone (GDL) was developedbased on the ferric hydroxamate reaction. Samples addedto a mixture of NH2OH·HCl and NaOH were heated toreact. Then HCl was added. Ferric chloride was added forcoloration, and 75% (v/v) ethanol was added. Absorbancevalues were measured after coloring for 10 min. Theconcentration range of a GDL calibration curve was 0.125-8.14 g/L. A 96-well plate high-throughput screening methodwas established to obtain desirable strains. A total of 215GDL-producing strains were identified from 4,327 samples. The highest production was 179 mg/L.
Performance of Tunnel Feet-Lock Pipe (TFP) in Sharing Vertical Foundation Load
Lijun Chen,Jianxun Chen,Yao Li,Yanbin Luo,Yongjun Mu,Taotao Hu,Chuanwu Wang 대한토목학회 2021 KSCE JOURNAL OF CIVIL ENGINEERING Vol.25 No.3
During the tunnel construction in soft ground, the insufficient bearing capacity of tunnel foundation usually causes a series of settlement problems. Tunnel feet-lock pipe (TFP) has been widely used to take the vertical load acting at the foundation of a tunnel foot. However, the detailed bearing performance of TFP is still not clear, and there is a lack of quantitative research. In this paper, a simple analytical approach is adopted to evaluate the performance of the TFP, and the main parameters affecting the supporting performance of the TFP are analyzed. The results show that the ϕ42 − ϕ140 TFP with the angle of 10° can take 3.8% −40.4% of vertical load. TFP has an effective length of 1.7 m − 2.8 m, which is related to the relative stiffness between the TFP and the stratum. With the increase of the installation angle, the TFP shares more vertical load. This trend is more obvious when the angle of the TFP is greater than 20°. If the proportion coefficient of the subgrade reaction coefficient is doubled, the vertical load shared by the TFP can be increased by 34% − 38%. For every 10 cm increase in overbreak behind the steel rib, the vertical load shared by TFP is reduced by 16%.
Rapid Expression of Bm46 in Bombyx mori Cell Lines, Larvae and Pupae
Wang, Haiyan,Chen, Keping,Guo, Zhongjian,Yao, Qin,Wang, Qiang,Mu, Runhong Korean Society of Sericultural Science 2007 International Journal of Industrial Entomology Vol.15 No.1
In this study, ORF 46 of Bombyx mod nucleopolyhedrovirus(Bm46) fused with EGFP was expressed in Bombyx mod cell lines, larvae and pupae by BmNPV Bacmid system. Bm46 and EGFP were cloned into donor plasmid pFastBacHTb, which was transformed to competent DH10B cells containing helper and BmNPV bacmid by site-specific transposition. Recombinant bacmid was used to transfected BmN-4 cells to produce the recombinant baculovirus vBm-Bm46-EGFP. Recombination virus was injected into silkworm larvae and pupae. The expression of the fusion protein was monitored by examining green fluorescence using a fluorescent microscope. Intense fluorescence in cells and silkworm was observed at 4 days post-infection, indicating the Bm46-EGFP fusion gene was expressed successfully.
Liang, Guijie,Xu, Jie,Xu, Weilin,Wang, Luoxin,Shen, Xiaolin,Yao, Mu Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.7
The geometries, electronic structures and absorption spectra of the two organic triphenylamine-based dyes TA-St-CA and TA-DM-CA, containing identical electron donors and acceptors but the different conjugated bridges, were studied by density functional theory (DFT) at the B3LYP and PBE1PBE levels, respectively. The influence of para-orientating methoxyl units on the electronic structures and light absorption properties of the dyes and the consequent photovoltaic performance of the dye-sensitized solar cells (DSSCs) were investigated in detail. The results indicate that the introduction of the para-orientating methoxyl units into the conjugated bridge induces the increased absorption wavelength as well as the more negative EHOMO corresponding to the bigger driving force $(E_{I^-/I^-_3}-E_{HOMO})$ for dye reduction, which together improve the photovoltaic performance of TA-DM-CA, although there is a decline of the open circuit voltage caused by the more negative $E_{LUMO}$.