175 research outputs found
Geochemical xharacteristics of selected elements in iron-manganese cutans and matrices of Alfisols in central China.
No full textO(p6) extension of the large-NC partial wave dispersion relations
No full textAbstractContinuing our previous work [Z.H. Guo, J.J. Sanz-Cillero, H.Q. Zheng, JHEP 0706 (2007) 030], large-NC techniques and partial wave dispersion relations are used to discuss ππ scattering amplitudes. We get a set of predictions for O(p6) low-energy chiral perturbation theory couplings. They are provided in terms of the masses and decay widths of scalar and vector mesons
De fotobromering van tolueen
No full textDocument uit de collectie Chemische ProcestechnologieDelftChemTechApplied Science
A Boltzmann-Tsallis approach towards cell survival curve in Radiobiology
No full textThis paper outlines a phenomenological approach towards cell survival curve at low dose using tools of extensive Statistical Mechanics and nonextensive Statistical Mechanics. An Ising chain model is developed for the cell survival curve and the canonical ensemble formalism based on Boltzmann Gibbs statistic and Tsallis statistic is presented. The resulting cell survival curve shows excellent agreement with the experimental data and the physical parameters from our Tsallis model (N’, q) can be shown to provide clear classification between healthy and cancerous cells. In this paper, we also provides possible biophysical interpretation to the (N’, q) parameters where N’ is representative of the amount of repairable DNA content in the nucleus and q represents the degree of correlation in DNA damage. Overall, this is the first time a Statistical Mechanics approach is used in Radiobiology, and could present a new perspective
Optimal Decision-making in Oil Extraction under Imprecise Information
No full textAbstractThe issue on investing was examined with probabilities given in the form of interval in oil extraction. The solution ways of decision-making on investment with three alternatives and four criteria have been investigated and alternative which will be invested in has been identified. It is shown that it is more appropriate to use the method based on interval probabilities in order to carry out geological and technical measures during investing, unlikely decision-making based on the classical probabilities
Automated discrete element method calibration using genetic and optimization algorithms
No full textThis research aims at developing a universal methodology for automated calibration of microscopic properties of modelled granular materials. The proposed calibrator can be applied for different experimental set-ups. Two optimization approaches: (1) a genetic algorithm and (2) DIRECT optimization, are used to identify discrete element method input model parameters, e.g., coefficients of sliding and rolling friction. The algorithms are used to minimize the objective function characterized by the discrepancy between the experimental macroscopic properties and the associated numerical results. Two test cases highlight the robustness, stability, and reliability of the two algorithms used for automated discrete element method calibration with different set-ups.Transport Engineering and LogisticsComputational Design and Mechanic
Optimization of Submerged Ceramic Micromembrane Filtration for Surface Water Treatment
No full textWater ManagementCivil Engineering and Geoscience
Microstructural modeling of early-age creep in hydrating cement paste
No full textThis paper presents a new approach to model the creep behavior of cement paste at early ages. The creep behavior is simulated by applying a time-varying generalized Maxwell model on the individual elements of a finite-element mesh of a simulated three-dimensional microstructure and compared with results in the literature. All mechanical properties of the constituent phases are taken from literature and Maxwell chain parameters are obtained by fitting the intrinsic creep of calcium silicate hydrate (C-S-H). A reasonable agreement between the simulations and the experimental results are obtained by assuming a constant C-S-H density of 2.0 g/cm3This paper presents a new approach to model the creep behavior of cement paste at early ages. The creep behavior is simulated by applying a time-varying generalized Maxwell model on the individual elements of a finite-element mesh of a simulated three-dimensional microstructure and compared with results in the literature. All mechanical properties of the constituent phases are taken from literature and Maxwell chain parameters are obtained by fitting the intrinsic creep of calcium silicate hydrate (C-S-H). A reasonable agreement between the simulations and the experimental results are obtained by assuming a constant C-S-H density of 2.0 g/cm3 . It was found that better agreements could be obtained at low degree of hydrations, by assuming a loosely packed C-S-H growing in the microstructure. It was also found that the short-term creep characteristics of C-S-H from nanoindentation can be used to reproduce macroscopic creep at least over a few days. The results show how numerical models can be used to upscale phase characteristics to macroscopic properties of composites
Characterization of the polymerization of SU-8 photoresist and its applications in micro-electro-mechanical systems (MEMS)
No full textFigure 6 from: Chen W-H, Radbouchoom S, Nguyen HQ, Nguyen HT, Nguyen KS, Shui Y-M (2018) Seven new species of Begonia (Begoniaceae) in Northern Vietnam and Southern China. In: Jin X-H, Shui Y-M, Tan Y-H, Kang M (Eds) Plant diversity in Southeast Asia. PhytoKeys 94: 65-85. https://doi.org/10.3897/phytokeys.94.23248
No full textFigure 6 Begonia minissima H.Q. Nguyen, Y.M. Shui & W.H. Chen A Habitat B Plant with rhizome C View of adaxial leaf D View of abaxial leaf E Inflorescence F Staminate flower, face view, side view and dorsal view G Pistillate flower, side views and dorsal view H Capsule I Serial cross sections of ovary. (A–D photographs by Y.M. Shui; E–I by S. Radbouchoom)
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