Change of Perioral Muscle Pressure in Class Ⅲ Malocclusion Subsequent to Orthognathic Surgery

Hong Yuan,Min-Kui Fu,Kyu-Rhim Chung,Young-Guk Park 대한턱관절교합학회 1999 구강회복응용과학지 Vol.15 No.1

Palladium nanoparticles decorated MXene for plasmon-enhanced photocatalysis

Hong Yuan,Subin Yu,Dohyub Jang,Minju Kim,홍혜지,Filipe Marques Mota,김동하 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.108 No.-

Two-dimensional MXene nanomaterials have found a wide application range in recent years. Here, Ti3C2MXene nanosheets exhibiting inherent photothermal activity reveal synergistic plasmon-enhanced photocatalyticproperties upon rational surface decoration with palladium nanoparticles (NPs). Pd incorporationinduces a 1.7-fold increase in the number of defect sites on the MXene surface. Mostimportantly, the introduced Pd nanoparticles favour an effective separation and collection of localizedsurface plasmon resonance (LSPR)-induced hot charge carriers generated at the surface of semimetallicTi3C2 NS, further facilitating the generation of hydrogen peroxide (H2O2). The generated H2O2is sequentially decomposed to hydroxyl radicals via the peroxidase (POD)-like activity of Pd NPs. ThePd@MXene shows approximately 2-fold enhancement of photocatalytic activity and excellent photostabilityunder laser irradiation. Taken together, this study highlights the promise of constructing active andstable MXene-based nanohybrids for highly effective photo-responsive nanomedicine.

Current Evidence on the Association between rs3757318 of C6orf97 and Breast Cancer Risk: a Meta-Analysis

Hong, Yuan,Chen, Xue-Qin,Li, Jiao-Yuan,Liu, Cheng,Shen, Na,Zhu, Bei-Bei,Gong, Jing,Chen, Wei Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.19

Background: A common genetic variant rs3757318, located in intron of C6orf97, was firstly identified to be associated with breast cancer (BC) risk by a genome-wide association (GWA) study. However, subsequent validation studies with different ethnicities have yielded conflicting results. Materials and Methods: We performed a meta-analysis to synthesize all available data for evaluating the precise effect of this variant on BC susceptibility. Results: A total of 8 articles containing 11 studies with 62,891 cases and 65,635 controls were included in this meta-analysis. When compared to the G allele, the rs3757318-A allele was significantly associated with BC risk with the pooled OR of 1.21 (95% CI=1.15 - 1.29, P<0.001) but with obvious between-study heterogeneity (P=0.040). Stratified analysis suggested that diversity of ethnicity along with control source may explain part of the heterogeneity. Similarly, significant associations were also identified in heterozygote, homozygote, dominant and recessive genetic models. Sensitivity and publication bias analyses indicated robust stability of our results. Conclusions: Our present meta-analysis demonstrated that the variant rs3757318 is associated with increased BC risk. Nevertheless, further studies are needed to clarify the underlying biological mechanisms.

A Comparative Study on Land Use and Spatial form of TOD Models in The United States and Japan, from a City-Scale Perspective

Hong Yuan,Yongming Zhang,Na Xu,Siting Chen Council on Tall Building and Urban Habitat Korea 2023 International journal of high-rise buildings Vol.12 No.1

The transit-oriented development (TOD) model can effectively help to solve urban problems and promote sustainable urban development. The United States and Japan are widely considered the earliest two countries to start TOD practices; however, the origins of TOD models in the two countries were different. The TOD practices in the two countries formed distinct characteristics, yet their differences have been underexplored. This study aims to grasp the characteristics of the TOD model in the two countries through a systematic comparative analysis of 10 typical cities in the United States and Japan that have adopted the TOD model. This paper compares the case cities' three key aspects of the TOD model: public transit system, spatial form, and land use, and summarizes the characteristics of TOD models in the two countries from a city-level perspective, to help deepen the global understanding of TOD.

A hybrid identification method on butterfly optimization and differential evolution algorithm

Hongyuan Zhou,Guangcai Zhang,Xiaojuan Wang,Pinghe Ni,Jian Zhang 국제구조공학회 2020 Smart Structures and Systems, An International Jou Vol.26 No.3

Modern swarm intelligence heuristic search methods are widely applied in the field of structural health monitoring due to their advantages of excellent global search capacity, loose requirement of initial guess and ease of computational implementation etc. To this end, a hybrid strategy is proposed based on butterfly optimization algorithm (BOA) and differential evolution (DE) with purpose of effective combination of their merits. In the proposed identification strategy, two improvements including mutation and crossover operations of DE, and dynamic adaptive operators are introduced into original BOA to reduce the risk to be trapped in local optimum and increase global search capability. The performance of the proposed algorithm, hybrid butterfly optimization and differential evolution algorithm (HBODEA) is evaluated by two numerical examples of a simply supported beam and a 37-bar truss structure, as well as an experimental test of 8-story shear-type steel frame structure in the laboratory. Compared with BOA and DE, the numerical and experimental results show that the proposed HBODEA is more robust to detect the reduction of stiffness with limited sensors and contaminated measurements. In addition, the effect of search space, two dynamic operators, population size on identification accuracy and efficiency of the proposed identification strategy are further investigated.

Study on localization influences of frequency veering on vibration of mistuned bladed disk

Hongyuan Zhang,Huiqun Yuan,Wenjun Yang,Tianyu Zhao 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.11

Reduced-order models of the bladed disk of the aero-engine compressor were established by adopting Prestressed component mode synthesis (PCMS) method. The frequency veering characteristics of the tuned bladed disk were analyzed. From the aspect of the strain energy, the forced vibration response of the mistuned bladed disk was analyzed, along with calculation of the contribution degree factors, the localization factors and frequency veering distances, finding the influences of the frequency veering distance, the contribution degree factors and the localization. The results show that frequency veering has significant influence on vibration localization of the mistuned bladed disk; in the region of frequency veering, the degree of vibration localization of the mistuned bladed disk is relatively high; along with the changes of the frequency veering distance, the contribution degree of the strain energy of the blades of localization of the mistuned bladed disk shows the certainty of regularity.

Optimum Operational Conditions for Chiral Separation of Tryptophan Enatiomers Using Ligand Exchange Liquid Chromatography

Hongyuan Yan,노경호 한국생물공학회 2007 Biotechnology and Bioprocess Engineering Vol.12 No.3

A simple and precise method for chiral separation of tryptophan enantiomers using high performance liquid chromatography with a ligand exchange mobile phase was developed. Chiral separation was performed on a conventional C18 column, using a mobile phase that consisted of a water-methanol solution (88:12, v/v) containing 10 mmol/L L-leucine and 5 mmol/L copper sulfate as a chiral ligand additive at a flow rate of 1.0 mL/min. This method allowed baseline separation of two enantiomers with a resolution of 1.84 in less than 30 min. The effect of various conditions, including concentration, type of ligand, organic modifier, pH, flow rate, and temperature, on enantioseparation were evaluated and chiral recognition mechanisms were investigated. Thermodynamic data (△△H and △△S) obtained by van’t Hoff plots revealed that enantioseparation is an enthalpy-controlled process.

Parameter Optimization Based on Evolutionary Algorithms for Green Cognitive Radio

Hongyuan Gao,Dandan Liu,Yanan Du 한국산학기술학회 2015 SmartCR Vol.5 No.5

In this paper, we study parameter adjustments that maximize the energy efficiency of green cognitive radio. Because the problem of parameter adjustments for green cognitive radio can be looked at as a complex discrete optimization problem, evolutionary algorithms can be applied to solve it. Parameter optimization methods based on quantum genetic algorithm (QGA), particle swarm optimization (PSO), and chaotic quantum particle swarm optimization (CQPSO) are designed. In particular, CQPSO integrates the characteristics of chaos with quantum particle swarm optimization (QPSO), which gives it strong global search abilities. Chaotic mutation is introduced into the proposed CQPSO to avoid premature convergence and keep diversity in populations. Quantum computing has excellent features used to increase optimization speed and enhance the search abilities of the algorithm. The proposed CQPSO method provides good performance in terms of convergence rate and convergence accuracy, and can search for an optimal solution to parameter adjustments in green cognitive radio networks. Through simulations comparing it to QGA and PSO, we conclude that the proposed CQPSO can improve energy efficiency and meet users’ quality of service needs.

Molecularly Imprinted Solid-Phase Extraction for Determination of Enrofloxacin and Ciprofloxacin in Chicken Muscle

Hongyuan Yan,노경호 대한화학회 2008 Bulletin of the Korean Chemical Society Vol.29 No.6

A simple and sensitive high-performance liquid chromatographic method was developed for the simultaneous identification of enrofloxacin and its active metabolite ciprofloxacin in chicken muscle. Norflorxacin imprinted polymers synthesized in water-containing systems show high selectivity to enrofloxacin and ciprofloxacin in an aqueous environment. Using these water-compatible imprinted polymers as selective adsorbents in the solid-phase extraction of enrofloxacin and ciprofloxacin from chicken samples, the remaining biological matrix could be quickly washed out from the imprinted column while enrofloxacin and ciprofloxacin were selectively retained and enriched. Analytical separation was performed on a C18 column using acetonitrile-water as a mobile phase and fluorescence detection. Good linearity was obtained from 0.8 to 500 ng/g (r > 0.998) with relative standard deviation of less than 3.9%. The mean recoveries of enrofloxacin and ciprofloxacin from chicken muscle were 80.6-94.5% and 77.8-91.8% at three different concentrations. The limits of determinations based on S/N=3 were 0.07 ng/g and 0.09 ng/g, which are below the maximum residue limits established in many countries.

Nucleation behavior of glutathione polymorphs in water

Hongyuan Wei,Zhi Chen,Leping Dang,Shuai Li 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.10

Nucleation behavior of glutathione (GSH) polymorphs in water was investigated by experimental method combined with classical nucleation theory. The solubility of α and β forms GSH in water at different temperatures,and the nucleation induction period at various supersaturations and temperatures were determined experimentally. The results show that, in a certain range of supersaturation, the nucleation of β form predominates at relatively higher temperature,while α form will be obtained at lower temperature. The nucleation kinetics parameters of α and β form were then calculated. To understand the crucial role of temperature on crystal forms, “hypothetic” nucleation parameters of β form at 283.15 K were deduced based on extrapolation method. The results show that the interfacial tension, critical free energy, critical nucleus radius and nucleus number of α form are smaller than that of β form in the same condition at 283.15 K, which implies that α form nucleates easier than β form at low temperature. This work may be useful for the control and optimization of GSH crystallization process in industry.