and gas bearing rock properties methodology of numerical simulation
electrical and gas - sensing properties of wo3 semiconductor material
... as a gas- sensing material for ethanol gas The analysis of the electrical properties and gas- sensing mechanism of WO3 -based sensors revealed that the calcining and operating temperature of sensor ... the increasing of operating temperature in the range of 80±200°C On the other hand, the sensitivity of sensor to other gases such as petrol, butane and methane is very low, though gas concentration ... in¯uence on the resistance change and gas sensitive characteristics of the WO3 sensor At calcining temperature of 500°C and operating temperature of 200°C, the gas sensors based on WO3 has good...
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thermal treatment effects on the material and gas-sensing properties of room-temperaturetungstenoxidenanorodsensors
... of (A) nitrogen and (B) oxygen They were observed with an Ar-ion laser excitation at 514 nm close to the wavenumbers of the strongest modes of monoclinic tungsten oxide The two bands at 270 and ... corner-sharing and two edge-sharing octahedral neighbors Each component consists of W 4f7/2 and W 4f5/2 doublet peaks with the spin-orbit splitting energy of 2.1 eV Fig 6A and B shows W 4f XPS spectra of ... deconvolution of W 4f XPS peaks, i.e the binding energy of the W 4f7/2 , FWHM and relative contribution of the two oxidation states All the samples exhibit identical binding energies of around 35.7 and...
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controlled synthesis and gas sensing properties of hollow sea urchin like
... best of our knowledge, this is the first report of the selective synthesis of ␣-Fe2 O3 superstructures and nanocubes The gassensing properties of the ␣-Fe2 O3 superstructures, nanocubes and nanoparticle ... surfaces The diameter of these pits is 5–9 nm The presence of the pits may be due to the decomposition of ␣-FeOOH and release of H2 O Fig 5a and b show SEM image and XRD pattern of the products obtained ... oxygen and reducing gas to the n-type semiconductors [35] So, logarithm of the response should be linear with logarithm of gas concentration Fig 7b–f displays chart of the logarithm of response of...
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Numerical study of hemodynamics and gas transport in arterioles
... both the location and magnitude of the O2 release sources and NO scavenging sites and this directly influences the gas bioavailability in time and space These aspects of the gas transport physics ... the gas transport in arterioles through altering gas transport properties of cells or diffusion dynamics of individual gasses This study aims to investigate the effect of hemodynamics on gas ... will affect the gas transport in arterioles through altering gas transport properties of cells or diffusion dynamics of individual gasses Based on this motivation, the effect of hemodynamics...
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Numerical simulation and performance test of metal hydride hydrogen storage system
... ρg density of gas r T t ur uz ρs µg radial direction Temperature time radial component of the gas velocity axial component of the gas velocity density of solid Molecular viscosity of hydrogen ... of thermal conductivity of unmodified powder bed, improvement of mass transfer in hydride bed, sufficient space for expansion and good sealing and high bearing pressure Metal hydride powder often ... are shown in Table and the thermo-physical properties of materials used in the simulation are shown in Table Figure The physical model of metal hydride reactor Table Properties of hydride materials...
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Numerical simulation and optimization of CO2 sequestration in saline aquifers for enhanced storage capacity and secured sequestration
... µn, and krn are the mobility, viscosity, and relative permeability of the non-wetting phase (CO2) respectively and mw, µw, and krw are the mobility, viscosity, and relative permeability of the ... optimization of the storage efficiency of an aquifer is of great interest in GCS Therefore, a simulation tool that has the capability of determining the optimal solutions by balancing various trade-offs ... the simulations of interest Table A1 in the Appendix summarizes the details of the domain properties Since it is inevitable that CO2 will eventually rise and concentrate near the ceiling (caprock)...
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Tài liệu Báo cáo khoa học: Toggle switches, pulses and oscillations are intrinsic properties of the Src activation/deactivation cycle doc
... N P Kaimachnikov and B N Kholodenko parameters and, for clarity of exposition, we present the analysis of the Src cycle in terms of Eqns (6–8) Intrinsic regulatory properties of the Src (de)activation ... Figure 4B helps us understand this excitable behavior by presenting the pulse of Src activity in the plane of the inactive and active fractions, si and s1 If the duration of the stimulus exceeds ... large activities of Csk and RPTP, demonstrating robustness of the bistable behavior Oscillations occurring within regions and correspond to lower concentrations of active Csk and RPTP than the...
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Tài liệu Báo cáo khoa học: "Extraction and Approximation of Numerical Attributes from the Web" pdf
... pattern-based framework that takes advantage of the properties of similar objects to improve extraction precision and allow approximation of requested numerical object properties Our framework comprises ... (e.g (Pantel and Pennacchiotti, 2006)) to reduce noise Some of the methods are suitable for retrieval of numerical attributes However, most of them not exploit the numerical nature of the attribute ... Usage of all this knowledge allows us to select the correct value of 1.695m and reject other values Thus we can increase the precision of value extraction by finding and analyzing an entire group of...
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Tài liệu Báo cáo Y học: Electrochemical, FT-IR and UV/VIS spectroscopic properties of the caa3 oxidase from T. thermophilus docx
... FT-IR spectroscopic properties of the caa3oxidase from T thermophilus in the presence and absence of cyanide, and compare the observed properties to previous reports on members of the heme copper ... oxidized and the negative signals with the reduced form of the enzyme For the reduced form, the Soret band can be observed at 415 and 442 nm, and for the oxidized form at 403 and 422 nm The b–band ... Analysis of the spectra and redox properties of pure cytochromes aa3 Biophys J 49, 717–729 25 Sidhu, G.S & Hendler, R.W (1990) Characterization of two low Em forms of cytochrome a3 and their...
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An Assessment of the Environmental Implications of Oil and Gas Production: A Regional Case Study pot
... Standard National Wildlife Federation Oil and gas Outer Continental Shelf Office of Enforcement and Compliance Assurance (EPA) Oil & Gas Accountability Project Office of Policy, Economics, and ... air, water, and land use impacts associated with oil and gas production nationally and in Region These policies range from the implementation of mandatory emissions limits on oil and gas operations ... tight gas sands, shale gas, and CBM Unconventional oil and gas resources are loosely defined as resources that are generally deeper and / or more difficult to recover than traditional oil and gas...
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The Economic Impacts for Ireland of High Oil and Gas Prices doc
... IMPACTS FOR IRELAND OF HIGH OIL AND GAS PRICES 15 Ireland‘s dependence on Oil and Gas future dominance of oil and gas in Ireland’s imported fuel mix Ireland is part of a handful of EU 27 countries ... IMPACTS FOR IRELAND OF HIGH OIL AND GAS PRICES Pathways to risk mitigation and a low carbon future Ireland‘s dependence on Oil and Gas Chapter ,s dependence on Oil and Gas Ireland Pathways to ... and a low carbon future Economic and Social Impacts of three Oil and Gas Price Scenarios Chapter Economic and Social Impacts of three Oil and Gas Price Scenarios Pathways to risk mitigation and...
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Báo cáo " Numerical simulation of sediment transport and morphology changes at the Bach Dang estuary " ppt
... 100 years (1%) (Table and figure 2) Wave height and period were representative of fairweather and storm conditions 9B and 12B, and a narrow spectrum was specified A time step of s was applied for ... Five simulations were conducted in which combinations of tide and wave forcing with different return period were applied (Table 1) For all cases with both wave and tide forcing Table Simulation Properties ... thickness and transport vectors, tide 1% and storm wave 9B Fig Change in total bed thickness and transport vectors, tide 50% and fair-weather wave Case 2: Tide 1% and storm wave 9B Transport vectors and...
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Raman spectroscopy and field electron emission properties of aligned silicon nanowire arrays
... completely (Fig 2a and b) Further structural characterization of the SiNWs was performed with TEM and HRTEM Fig shows a typical individual nanowire Fig SEM images of as-prepared and treated SiNWs ... surface of the silicon wafer at the initial stage Selfassembly of silver nanoclusters to the dendrite structure and lack of coalescence to a compact grain film continue to cause etching of the ... (FWHM) of 4.6 cmÀ1 can be seen in the Raman spectrum of c-Si, which can be attributed to the scattering of the first-order optical phonon (TO) of c-Si [21] In comparison, the firstorder Raman peak of...
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Introduction to Logic and to the Methodology of Deductive Sciences
... matters of broad significance, such as problems of language, knowledge, etc.; and as they strove for a maximum of clarity and precision, they employed freely the concepts of logic (and of the methodology ... concepts of the universal class and the null class, the fundamental notions of the calculus [or, of the algebra] of relations, and finally the conception of methodology as a general science of sciences ... product of the difference of these numbers and a sum of three terms, the first of which is the square of the first number, the second the product of the two numbers, and the third the square of the...
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glucose - mediated hydrothermal synthesis and gas sensing characteristics of wo3 hollow microspheres
... volume 3.4 Gas sensing characteristics As stated above, the gas responses of the R5 and R0.5 powders were negligible Thus, the gas responses of the R30-RH and R30 240 C.-Y Lee et al / Sensors and Actuators ... the effective gas diffusion (Fig 5) The gas response was improved fur- Fig Dynamic sensing transients of (a) R30-RH and (b) R30 sensors and (c) gas responses (Rg /Ra ) of R30-RH and R30 sensors ... reported higher gas responses The higher gas response of the R30 microspheres than those of the R5 and R05 powders was attributed to the higher surface area for gas sensing reaction and the large...
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large - scale synthesis and gas sensing application of vertically
... absorption band gap energy Two regions with a linear relationship are observed in the ranges of 3.5–4.2 eV and 5.0–6.0 eV, respectively, giving two Eg values of 2.77 eV and 2.26 eV The band gap of 2.77 ... conduction band) However, the band gap of 2.77 eV is much lower than the reported direct band gaps of WO3 The band edge position for amorphous WO3 in contact with an aqueous electrolyte at a pH of ∼1 ... species and make them excellent candidates for gas sensing applications [34,35] The gas sensing performance X Shen et al / Sensors and Actuators B 143 (2009) 325–332 329 Fig TEM and HRTEM images of...
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tio2 nanowires array fabrication and gas sensing properties
... lowest gas concentrations, expected responses are smallest and reported in Fig 9; brighter columns represent the nanowires sensor and lowest ones the gas response of standard solid film device Properties ... Council of Research in Lecce, where he has been working from many years in the field of preparation and characterisation of thin film for gas sensor and multisensing systems, being in charge of the ... He has been organiser and Chairman of International Conferences and Director of International Schools on Sensors and Microsystems He is member of the Steering Committee of AISEM, the Italian...
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Báo cáo " Reconstructing sedimentary environments of MR1 core and investigating facies’ geotechnical properties through the piezocone penetration test in the Late Pleistocene-Holocene periods in the Mekong River Delta " docx
... greenishgray clay and silt, greenish-gray sandy silt and fine to coarse sand in a coarsening-upward succession It is inhomogeneous, with several sandy layers of various thicknesses, some of the sandy layers ... Estuarine marine sand and sandy silt facies This facies corresponds to lithostratigraphic Unit The textural characteristics and the presence of mollusca indicate that sand and sandy silt were deposited ... coarse sand The delta front facies is particularly attractive and can be considered one of the unique characteristics of the MR1 core The sediments are sand and silty sand The coarse sandy layers...
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DIRECT NUMERICAL SIMULATIONS OF GAS–LIQUID MULTIPHASE FLOWS pot
... development of new numerical methods for direct numerical simulations (DNS) of multiphase flows that have produced detailed studies and improved knowledge of multiphase flows While the origin of DNS of ... is a Professor of Mechanics at the Universit´ Pierre et e Marie Curie (UPMC) in Paris and Head of the Jean Le Rond d’Alembert Institute (CNRS UMR 7190) DIRECT NUMERICAL SIMULATIONS OF GAS LIQUID ... pair of immiscible fluids and different thermodynamic phases, such as solid and liquid or vapor and liquid The properties of the fluids, including their equation of state, density, viscosity and...
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CHEMICAL REACTIONS IN GAS, LIQUID AND SOLID PHASES: SYNTHESIS, PROPERTIES AND APPLICATION pptx
... case preparation of our volume So, this volume is a complete guide to the subject of kinetic and mechanisms of chemical reactions in gas, liquid and solid states The editors and contributors ... before and after the exposure of samples show that the band at 1540 cm−1 of ~ C=C ~ bonds disappears, and the new band at 1550 cm−1 arises The latter belongs to nitro groups appearing as a result of ... cross-linking of macromolecules and that the degree of degradation and the yield (the weight percentage) of the gel fraction are complex functions of the exposure time For instance, the yield of the...
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