r 24 micro structured reactor plant for heterogeneously catalyzed gas phase reactions
Novel design of a compacted micro-structured air-breathing PEM fuel cell as a power source for mobile phones
Ngày tải lên :
05/09/2013, 14:58
... are based on planar plate and frame architecture, their volumetric power densities are inherently constrained by their two-dimensional active area This work introduces a novel micro- structured ... slower the convergence Figure Computational mesh of the planar compacted-design micro- structured air-breathing PEM fuel cell (quadratic) The values of the electrochemical transport parameters for ... the gas diffusion layers and the membrane The local current densities are solved based on the Butler-Volmer equation Convergence criteria are then performed on each variable and the procedure...
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Novel design of a disk-shaped compacted micro-structured air-breathing PEM fuel cell
Ngày tải lên :
05/09/2013, 14:58
... phase reduces to Darcy’s law, which is, however, based on the relative permeability for the gas phase (KP ) The relative permeability accounts for the reduction in pore space available for one phase ... mechanisms are considered; shear, which drags the liquid phase along with the gas phase in the direction of the pressure gradient, and capillary forces, which drive liquid water from high to low saturation ... the gas diffusion layers and the membrane The local current densities are solved based on the Butler-Volmer equation Convergence criteria are then performed on each variable and the procedure...
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iec 60255-24 electrical relays - common format for transient data exchange (comtrade) for power s
Ngày tải lên :
25/12/2013, 10:51
... or current transformer primary critical, ratio factor, real, numeric, minimum length = character, maximum length = 32 characters - , Channelvoltageorcurrenttransformer ratio secondaryfactor,critical,real, ... pour cette forme, et lesinterprétations de laformevarient Comme leslogicielsconçuspourliredesfichiers COMTRADE doiventêtrecapablesdereconnaîtreetinterpréter des nombresreprésentés dans ce format, ... Voltage transformers and current transformers are used to reduce the voltage and current signals on the power system to these lower values The transformer ratios are chosen so that when the power system...
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Tài liệu Presentation - Tek Trend - IBMS & Structured Cabling System for Intelligent Bldg doc
Ngày tải lên :
16/01/2014, 21:20
... Manufacturers IBMS & Network for Intelligent Building IBMS Protocols • Current Building Management Systems are proprietary networks • 47 separate proprietary protocols (US 2004 survey) • No Standard ... HVAC Fire System Electrical Generator/ System UPS Lifts Public Address Plant Rooms 0 :4 5 SCADA Interfaces Remote Reader Electronics Card Readers Access Controller tribution witches IBMS/Security ... user locations – Heterogeneity / Disparate islands) – Tendency towards disorder • Ensuring QoS and error-free bandwidth Changes in networks for IP convergence Central Computing Printer Scanner...
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Báo cáo toán học: " R bits user selection switch feedback for zero forcing MU-MIMO based on low rate codebook" docx
Ngày tải lên :
20/06/2014, 20:20
... large inter-user interference in user selection criteria The large inter-user interference will decrease throughput largely For example, if the inter-user interference || H i p j ||2 is more ... obvious for small number of users and little for large number of users It is because the user pairing procedure usually cannot find proper paired users for MUMIMO transmission in small user number ... number of users increases, it has more users with little inter-user interference, and then the user pairing procedure for USS feedback is easily to find proper paired users for MU-MIMO Figure shows...
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Báo cáo hóa học: " Investigation of pre-structured GaAs surfaces for subsequent site-selective InAs quantum dot growth" potx
Ngày tải lên :
21/06/2014, 05:20
... (KIT) for sample preparation Furthermore, we would like to thank Heinrich Reimer for his help with designing and building the UV-ozone cleaner Author details DFG-Center for Functional Nanostructures ... Karlsruhe, Germany Laboratorium f r Elektronenmikroskopie (LEM), Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany Authors’ contributions MH prepared most of the samples, carried ... The growth rates for GaAs and InAs were determined as 0.3 and 0.07 ML/s, respectively The pre -structured samples as well as the uncapped QD samples were characterized by atomic force microscopy...
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báo cáo hóa học:" R bits user selection switch feedback for zero forcing MU-MIMO based on low rate codebook" doc
Ngày tải lên :
21/06/2014, 17:20
... large inter-user interference in user selection criteria The large inter-user interference will decrease throughput largely For example, if the inter-user interference || H i p j ||2 is more ... obvious for small number of users and little for large number of users It is because the user pairing procedure usually cannot find proper paired users for MUMIMO transmission in small user number ... number of users increases, it has more users with little inter-user interference, and then the user pairing procedure for USS feedback is easily to find proper paired users for MU-MIMO Figure shows...
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Báo cáo hóa học: " Research Article New Structured Illumination Technique for the Inspection of High-Reflective Surfaces: Application for the Detection of Structural Defects" doc
Ngày tải lên :
22/06/2014, 19:20
... this surface abnormality Hence, contrariwise to the above-cited methods, a precalibration step of the recording camera or the structured illumination is not necessary Therefore, the structure of ... After describing how the Nr rays forming the illumination are to be projected onto the surface, we detail more precisely the different parts forming this adapted structured illumination (L) Figure ... However, for structural defects, the parallel structure of the stripes is deformed or vanished; see Figure 6(d2) In our four textural defects examples, we see that the corresponding image disturbances...
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4 reactor design for multiple reactions
Ngày tải lên :
23/05/2015, 09:24
... and are contravariant: ≈ 50% in irreversible reactions ≈ 50% in reversible reactions and are covariant: ≈ 95% in irreversible reactions ≈ 95% in reversible reactions Single reversible reactions ... PFR PFR < PFR CSTR CSTR PFR Polymerization reactions Polymerized by functional groups BR PFR Polymerized by free radical BR PFR Polymer has a wide distribution of molar mass Polymer has a narrow ... + Decrease concentration of inert Increase concentration of inert Reactor Separator Reactor Product Separator + + Reactor Separator + ...
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dy and performance enhancement of fast tool servo diamond turning of micro structured surfaces
Ngày tải lên :
10/09/2015, 15:52
... of microstructured surfaces National University of Singapore NUS Chapter Literature Review 13 2.2 Methods for fabricating micro- structured surfaces When feature sizes of the structured surfaces ... Figure 2.1 Figure 2.1 Methods for fabricating micro- structured surfaces MEMS processes: These processes are not specific for fabrication of micro- structured surfaces However, they are suitable for ... (d) Areal error map based on point-to-plane error metric; (e) Refined areal error map based on point-to-point error metric; (f) Refined areal error map based on point-to-plane error metric ...
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Development of micro total analysis system for detection of water pathogens
Ngày tải lên :
04/10/2015, 15:57
... Operating Procedures 144 Appendix K Operating Procedures for DNA Microarray 145 Appendix L DNA Microarray Surface Modification Protocol 146 Appendix M Operating Procedures for BioChip Arrayer 147 ... Printed Circuit Board (PCB) Design 25 3.1.4 Acrylic Housing for µPCR Chip 26 DNA Microarray 26 3.2.1 Design of DNA Microarray 26 3.2.2 27 Acrylic Housing for DNA microarray 3.3 Design of Micro Total ... 41 Figure 4.6: DNA microarray setup (a) DNA microarray in acrylic housing; (b) System setup; (c) Data analysis floe for DNA microarray hybridization experiments 44 Figure 4.7: Probes format 46...
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MICRO AND NANO FLUIDICS FOR DNA MOLECULES APPLICATIONS
Ngày tải lên :
13/10/2015, 15:54
... DNA (figure 3) Two strands of the nucleotides forms a double-helix structure The major groove and minor groove along the DNA structure are formed Three major portions of the nucleotides are: the ... concentration of DNA molecules the phase transition occurs at 800µM concentration of spermidine Therefore critical concentration of spermidine needed for the phase transition remains constant irrespective ... three phosphates adjacent from the same strand.(c) Intrastrand across the major groove.(d) Intrastrand across the minor groove[13] (image taken from Amin Ahmed Ouameur and Heidar-Ali Tajmir-Riahi,...
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Financial feasibility study of investment new ammonia plant for PVFCCO
Ngày tải lên :
23/10/2015, 15:38
... for measuring the relationship between return from a particular share and that of market return (Brealy et al., 2007): re = rf + β(rm- rf) where, re: expected return on equity rf: risk-free rate ... PVGas representative to collect information regarding the natural gas price, the plan for current and future gas resource The interview will cover the following information: - Current gas resource; ... forecast price for the next year is the average of historical prices and previous predicted figure Therefore, forecast price of a certain product is generalized as follows: = Where: Ft + : product...
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Plant physiology - Chapter 8 Photosynthesis: Carbon Reactions pdf
Ngày tải lên :
07/03/2014, 20:20
... photosynthetic apparatus Arabidopsis mutants that are unable to photorespire grow normally under 2% CO2, but they die rapidly if transferred to normal air There is evidence from work with transgenic plants ... glycolate (four carbons) transported from the chloroplast into the peroxisome are converted to glycine, which in turn is exported to the mitochondrion and transformed to serine (three carbons) with ... with the concurrent release of carbon dioxide (one carbon) Serine is transported to the peroxisome and transformed to glycerate The latter flows to the chloroplast where it is phosphorylated to...
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Báo cáo khoa học: Kinetic deuterium isotope effects for 7-alkoxycoumarin O-dealkylation reactions catalyzed by human cytochromes P450 and in liver microsomes Rate-limiting C-H bond breaking in cytochrome P450 1A2 substrate oxidation pdf
Ngày tải lên :
16/03/2014, 13:20
... and W A McCormick for preparing some of the enzymes, M W Calcutt for preparing 7-[2-d1]OEt coumarin, and K Trisler for assistance in preparation of the manuscript References Palmer G & Reedijk J ... coumarin were purchased from SigmaAldrich (Milwaukee, WI, USA) and recrystallized from EtOH-H2O mixtures before use The deuterated substrates were prepared and characterized as described elsewhere ... measured from the ratio of d1 ⁄ d0 acetaldehyde product mixture Conceivably the P450s being examined here could show a partial or strict stereochemical preference for one or the other face For instance,...
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AVAILABLE AND EMERGING TECHNOLOGIES FOR REDUCING GREENHOUSE GAS EMISSIONS FROM THE PULP AND PAPER MANUFACTURING INDUSTRY doc
Ngày tải lên :
18/03/2014, 02:20
... savings were approximately $400,000/year (2009 dollars) (Kramer 2009) Gap forming Gap formers are an alternative to the Fourdrinier paper machine The forming sections are very short, and the formation ... may operate direct-fired dryers to reduce the moisture content of boiler fuel (e.g., wet bark or wastewater treatment residuals) or to dry pulp or paper Thermal oxidizers or regenerative thermal ... Efficient repulping rotors Newer repulper rotor designs have been optimized for power consumption Reportedly, replacing an existing rotor with a new rotor that is optimized for efficiency can reduce rotor...
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hybrid metal oxide and multiwall carbon nanotube films for low temperature gas sensing
Ngày tải lên :
19/03/2014, 16:48
... resistance after its exposure to a test gas and the sensor baseline resistance in air: Rair − Rgas (1) S= Rair where Rair is the sensor resistance in air and Rgas is the sensor resistance in the presence ... were found to be sensitive to NO2 when operated at room temperature [19] However, the responsiveness reported for these pure MWCNTs sensors to NO2 was far lower than the one reported here for ... the pollutant after reaching a steady state Responsiveness results are summarized in Fig In order to further evaluate the performance in gas sensing for the different hybrid materials investigated,...
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