Zur Lumineszenzschädigung von ZnS/Cu

In this paper, we extend our previous 2D connected-tube marked point process (MPP) model to a 3D connected-tube MPP model for fiber detection. In the 3D case, a tube is represented by a cylinder model with two spherical areas at its ends. The spherical area is used to define connection priors that encourage connection of tubes that belong to the same fiber. Since each long fiber can be fitted by a series of connected short tubes, the proposed model is capable of detecting curved long tubes. We present experimental results on fiber-reinforced composite material images to show the performance of our method.

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Nitrate and chloride formation in chloramination

Water Science & Technology ◽

10.2166/wst.1994.0453 ◽

1994 ◽

Vol 30 (9) ◽

pp. 101-110

Author(s):

V. Diyamandoglu

Keyword(s):

Kinetic Model ◽

Analytical Method ◽

Kinetic Data ◽

Experimental Results ◽

Mass Balances ◽

Time Profiles ◽

Slow Decay ◽

Concentration Time ◽

End Products ◽

Chlorine Residuals

The formation of nitrate and chloride as end-products of chloramination (combined chlorination) was investigated at pH ranging between 6.9 and 9.6 at 25°C. The experimental results comprised concentration-time profiles of combined chlorine residuals along with nitrate and chloride. Nitrite, if present, was always below the detectibility limit of the analytical method used (25 ppb). Mass balances on chlorine species depicted that chloride formed during the slow decay of combined chlorine residuals does not account for all the chlorine lost. This substantiates the formation of other reaction end-products which are yet to be identified. A kinetic model for chloramination is proposed based on the kinetic data obtained in this study.

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Multimedia Quality Integration Using Piecewise Function

Advanced Engineering Forum ◽

10.4028/www.scientific.net/aef.1.375 ◽

2011 ◽

Vol 1 ◽

pp. 375-380

Author(s):

Shu Ai Wan ◽

Kai Fang Yang ◽

Hai Yong Zhou

Keyword(s):

Visual Quality ◽

Experimental Results ◽

Integration Model ◽

Quality Performance ◽

Piecewise Function ◽

Proposed Model ◽

Constant Coefficients ◽

Theoretical Analyses ◽

Different Levels

In this paper the important issue of multimedia quality evaluation is concerned, given the unimodal quality of audio and video. Firstly, the quality integration model recommended in G.1070 is evaluated using experimental results. Theoretical analyses aide empirical observations suggest that the constant coefficients used in the G.1070 model should actually be piecewise adjusted for different levels of audio and visual quality. Then a piecewise function is proposed to perform multimedia quality integration under different levels of the audio and visual quality. Performance gain observed from experimental results substantiates the effectiveness of the proposed model.

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Effect of GeO2 additive on fluorescence intensity enhancement in bismuth-doped silica glass

Journal of Materials Research ◽

10.1557/jmr.2007.0073 ◽

2007 ◽

Vol 22 (3) ◽

pp. 565-568 ◽

Cited By ~ 7

Author(s):

Yasushi Fujimoto ◽

Yuki Hirata ◽

Yoshiyuki Kuwada ◽

Takahiro Sato ◽

Masahiro Nakatsuka

Keyword(s):

Fluorescence Intensity ◽

Silica Glass ◽

Experimental Results ◽

Full Width ◽

Half Maximum ◽

Intensity Enhancement ◽

Luminescent Centers

We observed the enhancement of fluorescence intensity due to the addition of GeO2 in bismuth-doped silica glass (BiSG), which has a peculiar fluorescence at 1.25 μm with a full width at half-maximum of 300 nm. Experimental results revealed that the fluorescence intensity from BiSG with 5.0 mol% GeO2 increased remarkably to be 26.3 times greater than that without GeO2 additive for the same Bi2O3 concentration (0.1 mol%). Furthermore, the enhanced sample showed almost the same intensity as BiSG without GeO2 for 1.0 mol% Bi2O3. These results demonstrate that GeO2 additive effectively promotes the generation of peculiar luminescent centers.

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Testing a KrCl excilamp as new enhanced UV source for 4-chlorophenol degradation: Experimental results and kinetic model

Chemical Engineering and Processing - Process Intensification ◽

10.1016/j.cep.2009.11.016 ◽

2010 ◽

Vol 49 (1) ◽

pp. 113-119 ◽

Cited By ~ 19

Author(s):

M. Gomez ◽

M.D. Murcia ◽

J.L. Gomez ◽

G. Matafonova ◽

V. Batoev ◽

...

Keyword(s):

Kinetic Model ◽

Experimental Results

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On the Impossibility of an OH-Radical Model for Photosynthetic Water Oxidation / Über die Unmöglichkeit eines OH-Radikalmodells für die photosynthetische Wasseroxidation

Zeitschrift für Naturforschung B ◽

10.1515/znb-1972-0212 ◽

1972 ◽

Vol 27 (2) ◽

pp. 172-176 ◽

Cited By ~ 2

Author(s):

Gerhard Vierke

Keyword(s):

Kinetic Model ◽

Water Oxidation ◽

Photosynthetic Apparatus ◽

Experimental Results ◽

Oh Radicals ◽

Oh Radical ◽

Inherent Property ◽

Evolving System ◽

Photosynthetic Water Oxidation ◽

Radical Model

If it is assumed that the oscillating O2 flash yield sequence of algae and chloroplasts predominantly reflects an inherent property of the O2 evolving system of the photosynthetic apparatus it is shown that the OH-radical model (O2 production by recombination of four OH radicals) is contradictory to the experimental results because it predicts an aperiodic O2 flash yield sequence.Several experimental facts already known strongly indicate that the OH-radical model is not consistent with the kinetic model for O2 evolution of KOK et al. either.

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Coupling Quasi-Two-Dimensional Friction Model and Discrete Vapor Cavity Model for Simulation of Transient Cavitating Flows in Pipeline Systems

Mathematical Problems in Engineering ◽

10.1155/2020/8089308 ◽

2020 ◽

Vol 2020 ◽

pp. 1-12

Author(s):

Qiang Sun ◽

Yuebin Wu ◽

Ying Xu ◽

Liang Chen ◽

Tae Uk Jang

Keyword(s):

Cost Effective ◽

Friction Model ◽

Experimental Results ◽

Complex Nature ◽

Two Dimensional ◽

Cavity Model ◽

Cavitating Flows ◽

Vapor Cavity ◽

Proposed Model ◽

Pipeline Systems

Accurate simulation of cavitating flows in pipeline systems is important for cost-effective surge protection. However, this is still a challenge due to the complex nature of the problem. This paper presents a numerical model that combines the discrete vapor cavity model (DVCM) with the quasi-two-dimensional (quasi-2D) friction model to simulate transient cavitating flows in pipeline systems. The proposed model is solved by the method of characteristics (MOC), and the performance is investigated through a numerical case study formulated based on a laboratory pipeline reported in the literature. The results obtained by the proposed model are compared with those calculated by the classic one-dimensional (1D) friction model with the DVCM and the corresponding experimental results provided by the literature, respectively. The comparison shows that the pressure peak, waveform, and phase of pressure pulsations predicted by the proposed model are closer to the experimental results than those obtained by the classic 1D model. This demonstrates that the proposed model that combines the quasi-2D friction model with the DVCM has provided a solution to more accurately simulate transient cavitating flows in pipeline systems.

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Modeling Hydroplaning and Effects of Pavement Microtexture

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198105190500118 ◽

2005 ◽

Vol 1905 (1) ◽

pp. 166-176 ◽

Cited By ~ 6

Author(s):

G. P. Ong ◽

T. F. Fwa ◽

J. Guo

Keyword(s):

Three Dimensional ◽

Flow Simulation ◽

Experimental Results ◽

Tire Pressure ◽

Finite Volume Model ◽

Proposed Model ◽

Loss Of Contact ◽

The One ◽

Theoretical Considerations ◽

Good Agreement

Hydroplaning on wet pavement occurs when a vehicle reaches a critical speed and causes a loss of contact between its tires and the pavement surface. This paper presents the development of a three-dimensional finite volume model that simulates the hydroplaning phenomenon. The theoretical considerations of the flow simulation model are described. The simulation results are in good agreement with the experimental results in the literature and with those obtained by the well-known hydroplaning equation of the National Aeronautics and Space Administration (NASA). The tire pressure–hydroplaning speed relationship predicted by the model is found to match well the one obtained with the NASA hydroplaning equation. Analyses of the results of the present study indicate that pavement microtexture in the 0.2- to 0.5-mm range can delay hydroplaning (i.e., raise the speed at which hydroplaning occurs). The paper also shows that the NASA hydroplaning equation provides a conservative estimate of the hydroplaning speed. The analyses in the present study indicate that when the microtexture of the pavement is considered, the hydroplaning speed predicted by the proposed model deviates from the speed predicted by the smooth surface relationship represented by the NASA hydroplaning equation. The discrepancies in hydroplaning speed are about 1% for a 0.1-mm microtexture depth and 22% for a 0.5-mm microtexture depth. The validity of the proposed model was verified by a check of the computed friction coefficient against the experimental results reported in the literature for pavement surfaces with known microtexture depths.

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Stiffness model of fixed joint considering self-affinity and elastoplasticity of asperities

Industrial Lubrication and Tribology ◽

10.1108/ilt-05-2019-0192 ◽

2019 ◽

Vol 72 (1) ◽

pp. 128-135 ◽

Cited By ~ 1

Author(s):

Hongxu Chen ◽

Qin Yin ◽

Guanhua Dong ◽

Luofeng Xie ◽

Guofu Yin

Keyword(s):

Elastic Deformation ◽

Contact Stiffness ◽

Roughness Parameter ◽

Experimental Results ◽

Content Type ◽

Elastoplastic Contact ◽

Proposed Model ◽

Stiffness Model ◽

Fractal Roughness ◽

Deformation Ratio

Purpose The purpose of this paper is to establish a stiffness model of fixed joint considering self-affinity and elastoplasticity of asperities. Design/methodology/approach The proposed model considers that asperities of different scales are interrelated rather than independent. For elastoplastic contact, a spring-damper model and an elastic deformation ratio function were proposed to calculate the contact stiffness of asperities. Findings A revised fractal asperity model was proposed to calculate the contact stiffness of fixed joint, the impacts of the fractal dimension, the fractal roughness parameter and the Meyer index on the contact stiffness were discussed, and the present experimental results and the Jiang’s experimental results showed that the stiffness can be well predicted by proposed model. Originality/value The contradiction between the Majumdar and Bhushan model and the Morag and Etsion model can be well explained by considering the interaction among asperities of different scales. For elastoplastic contact, elastic deformation ratio should be considered, and the stiffness of asperities increases first and then decreases with the increasing of interference.

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Open Domain Event Text Generation

Proceedings of the AAAI Conference on Artificial Intelligence ◽

10.1609/aaai.v34i05.6278 ◽

2020 ◽

Vol 34 (05) ◽

pp. 7748-7755

Author(s):

Zihao Fu ◽

Lidong Bing ◽

Wai Lam

Keyword(s):

Experimental Results ◽

Text Generation ◽

Open Domain ◽

Related Event ◽

Extensive Analysis ◽

Proposed Model ◽

Readable Text ◽

Overfitting Problem

Text generation tasks aim at generating human-readable text from different kinds of data. Normally, the generated text only contains the information included in the data and its application is thus restricted to some limited scenarios. In this paper, we extend the task to an open domain event text generation scenario with an entity chain as its skeleton. Specifically, given an entity chain containing several related event entities, the model should retrieve from a trustworthy repository (e.g. Wikipedia) the detailed information of these entities and generate a description text based on the retrieved sentences. We build a new dataset called WikiEvent1 that provides 34K pairs of entity chain and its corresponding description sentences. To solve the problem, we propose a wiki augmented generator framework that contains an encoder, a retriever, and a decoder. The encoder encodes the entity chain into a hidden space while the decoder decodes from the hidden space and generates description text. The retriever retrieves relevant text from a trustworthy repository which provides more information for generation. To alleviate the overfitting problem, we propose a novel random drop component that randomly deletes words from the retrieved sentences making our model more robust for handling long input sentences. We apply the proposed model on the WikiEvent dataset and compare it with a few baselines. The experimental results show that our carefully-designed architecture does help generate better event text, and extensive analysis further uncovers the characteristics of the proposed task.

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