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Quantitative weighted estimates for oscillatory singular integrals with rough kernels
Yanping Chen,Wenyu Tao 대한수학회 2022 대한수학회보 Vol.59 No.1
In this paper, we obtain the quantitative weighted bounds of oscillatory singular integral with rough kernel. Moreover, the quantitative weighted bounds of maximally truncated oscillatory singular integral with rough kernel are also obtained.
The Complete Oxidation of Ethanol at Low Temperature over a Novel Pd–Ce/γ-Al2O3–TiO2 Catalyst
Yanping Wang,Jinshuang Zhao,Xiaoli Wang,Zhe Li,Pengfei Liu 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.8
Pd–Ce/γ-Al2O3–TiO2 catalysts were prepared by combined sol–gel and impregnation methods. Transmission electron microscopy, X-ray diffraction, H2-temperature-programmed reduction, O2-temperature-programmed desorption, and ethanol oxidation experiments were conducted to determine the properties of the catalysts. Addition of an optimal amount of Ce improved the performance of the Pd/γ-Al2O3–TiO2 catalyst in promoting the complete oxidation of ethanol. The catalyst with 1% Ce exhibited the highest activity, and catalyzed complete oxidation of ethanol at 175 °C; its selectivity to CO2 reached 87%. Characterization results show that addition of appropriate amount of Ce could enrich the PdO species, and weaken the Pd–O bonds, thus enhancing oxidation ability of the catalyst. Meanwhile, the introduction of CeO2 could make PdO better dispersed on γ-Al2O3–TiO2, which is beneficial for the improvement of the catalytic oxidation activity.
Development of a 97.5-inch Super Hi-Vision 8K × 4K liquid crystal display panel
Yanping Liao,Xibin Shao,Jianfeng Yuan,Xiqing Zhang,Ji Zhang,Changlin Leng,Yinglong Huang,Seongkuy Lee 한국정보디스플레이학회 2015 Journal of information display Vol.16 No.3
A prototype 97.5-inch 8K×4K a-Si liquid crystal display (LCD) panel for Super Hi-Vision with ultra-high definition was successfully developed using the BOE exclusive advanced super-dimensional switching technology. This LCD has a panel with 7680(×3) by 4320 pixels, 16 times those of the conventional Full High Definition (FHD), and the pixel size of the panel is 0.2811mm (90.4 pixels per inch). The liquid crystal charging time was extended by quad area and double source line structure (also called “2G2D driving”). Additionally, a multi-functional image-processing video board was developed to compatibly realize the real-time display of huge image data from FHD to 8K. Furthermore, the reason for the arcing that occurred in half-tone source–drain mask etching was discussed and was ultimately solved by improving the exposure process. The demonstrated panel features a 1200:1 contrast ratio, 500 nit brightness, and 72% color gamut.
The Effect of N-Acetylcysteine Addition on the Polymerization Behavior of PMMA Bone Cement
Yanping Cheng,임범순,양형철,조재형,이상혁 한국고분자학회 2012 Macromolecular Research Vol.20 No.9
N-Acetylcysteine (NAC), a well-known thiol-containing antioxidant, may alleviate the toxicity of poly (methyl methacrylate) (PMMA) bone cement through the inactivation of the monomer components in the cement by its sulfhydryl moiety. This study aimed to reveal the effects of the NAC on the polymerization heat, degree of conversion (DC), mechanical properties, and residual monomer release of PMMA bone cement. The addition of NAC (0, 0.25, 0.50, 0.75, and 1.00 wt%) to PMMA powder significantly reduced the maximum polymerization temperature and steadily delayed the setting time. The DC of all experimental PMMA bone cements reached as high as 91% after 7 days of incubation, as determined by Fourier transform infrared spectroscopy (FTIR). The experimental groups showed steady declines in flexural strength and surface hardness as a fraction of increasing NAC. Meanwhile,the mechanical properties of the experimental groups increased with the duration of time. The amount of methyl methacrylate (MMA) leached into deionized water was analyzed using high performance liquid chromatography (HPLC) and was found to increase with an immersion time up to 24 h, after which no subsequent change was observed. The results showed a linear correlation between the thermal and mechanical properties and the released MMA with the DCs of the experimental groups. The potential usefulness of NAC in developing more biocompatible PMMA bone cement for increased working performance was highlighted in this study.
QoS Route Optimization Algorithm for the Dynamic Traffic and Network Service
Yanping Chen,Yulong Gao 보안공학연구지원센터 2014 International Journal of Future Generation Communi Vol.7 No.6
Transforming the convolution to the (+,-) in legend domain is proposed in this paper. Based on the transformation, the Legend Transformation of service curve and arrive curve is given in the case of independent cross traffic, and the closed expression of stochastic delay and stochastic backlog is obtained. In the paper, we analyze influence of the dynamic of traffic and network to QoS parameter. Based on the analysis result, the QoS analysis in Legend domain is given, and the upper bound of delay and backlog in Legend domain. For the case of non-independent cross traffic, the relationship expression of different traffic is got. And simulation proves that the route optimization algorithm is correct.
An Itelligent System for Diagnosis of Coronary Artery Disease with BP Neural Networks
Yanping Ba,Liya Hou,Shuicai Wu,Di Zhang 대한의료정보학회 2007 Healthcare Informatics Research Vol.13 No.2
Objective: In this paper, an intelligent system using BP neural networks (BPNN) is presented for early detection coronary artery disease (CAD). Methods: Based on the four features of ECG signals and six basic parameters of patients, BPNN was built and trained. Especially the method which combined feature extraction and classification was discussed. Results: The performance of the intelligent system has been evaluated in 20 samples. The test results showed that this system was effective in detecting CAD. The correct classification rate was about 90% for normal subjects and 100% for abnormal subjects. Conclusion: BPNN could quite accurately detect abnormal subjects. Because it is not expensive and noninvasive, it is fit to examine health of the elderly and has good application foreground. (Journal of Korean Society of Medical Informatics 13-2, 147-151, 2007)
Yanping Hao,Yi Li,Zhigang Liu,Xiangyu Yan,Yi Tong,Huiliang Zhang 한국섬유공학회 2019 Fibers and polymers Vol.20 No.9
In this study, polyaryl polymethylene isocyanate (PAPI) was used as a chain extender for poly(lactic acid) (PLA)to produce a high molecular weight material with better rheological, thermal and mechanical properties. The reactionbetween PLA chains and PAPI was proved by FTIR during reactive blending. The results showed that the molecular weightand molecular weight distribution were increased with the addition of PAPI content due to the chain extension. Chainextension was also responsible for the increased modulus and complex viscosity. The glass transition temperature (Tg) andthermal stability increased by incorporating with PAPI. The results of mechanical properties showed that a considerablyhigher tensile strength and Young’s modulus of the reactive blends compared with neat PLA.
Depth for triangulated categories
Yanping Liu,Zhongkui Liu,Xiaoyan Yang 대한수학회 2016 대한수학회보 Vol.53 No.2
Recently a construction of local cohomology functors for compactly generated triangulated categories admitting small coproducts is introduced and studied by Benson, Iyengar, Krause, Asadollahi and their coauthors. Following their idea, we introduce the depth of objects in such triangulated categories and get that when $(R,\mathfrak{m})$ is a graded-commutative Noetherian local ring, the depth of every cohomologically bounded and cohomologically finite object is not larger than its dimension.