... performance and design of air-breathing PEM fuel cells Litster and Djilali [1] developed a single-phase one-dimensional semi-analytical model of the membrane electrode assembly (MEA) of planar air-breathing ... can be seen that for a high nominal current density, a high fraction of the current is generated at the catalyst layer near the air inlet area, leading to under-utilization of the catalyst at ... However, these fuel cell designs have generally relied on traditional planar MEA architecture Because the majority of PEM fuel cell designs are based on planar plate and frame architecture, their
Ngày tải lên: 05/09/2013, 14:58
... Mechanical behaviour of PEM fuel cell catalyst layers during regular cell operation International Journal of Energy and Environment, 2010; 1(6), 927-936 [16] Maher A. R Sadiq Al-Baghdadi A CFD analysis ... and zero flux boundary condition at the anode catalyst layer interface and cathode catalyst layer interface respectively An initial guess of the activation overpotential is obtained from the desired ... Kelvin near the catalyst layer regions, where the electrochemical activity is highest The temperature peak appears in the cathode catalyst layer, implying that major heat generation takes place in
Ngày tải lên: 05/09/2013, 14:58
báo cáo hóa học: " Application of a hybrid wavelet feature selection method in the design of a self-paced brain interface system" pptx
... potentials by means of fast wavelet transform Brain Lang 1999, 66:129-145 Samar VJ, Bopardikar A, Rao R, Swartz K: Wavelet analysis of neuroelectric waveforms: A conceptual tutorial Brain Lang 1999, ... histograms with 10 bins each, the probability function of each feature was estimated and its mutual information with each of the output classes was calculated The values of MI were calculated for all ... elimination of channels) Systematic elimination of channels can lead to a faster setup of the system as well as decreased computational time This could be part of future research works aimed at
Ngày tải lên: 19/06/2014, 10:20
Báo cáo hóa học: " Multiple-Clock-Cycle Architecture for the VLSI Design of a System for Time-Frequency Analysis" doc
... Not a2 [19 18] a2 [19 0] GND a2 [17 0] Datab[] Dataa[] Cin ParADD1 Cin Datab[] Cin Dataa[] q[] Cout SM[19 0] Output Cout Result[] LPM ADD SUB ParADD1 Datab[] Result[] LPM ADD SUB Dataa[] OutREG ... SCI has no latency [17] The arithmetic units are realized by using combinational logic, meaning that all calculation operations are performed in parallel The schematic diagram of its FPGA ... These abilities represent the major advantages of multicycle design and they help reduce both hardware complexity and cost. The designed hardware is suitable for a wide range of applications, because
Ngày tải lên: 22/06/2014, 23:20
Báo cáo hóa học: " Design of a Low-Power VLSI Macrocell for Nonlinear Adaptive Video Noise Reduction" doc
... possibilities of data flow organization (and design of a memory hierarchy between background frame memories and data paths of the video processor) exist enabling also vertical window over- lapping (not ... the paper. It is based on a nonlinear rational filter enhanced by a noise estimator for blind and dynamic adaptation of the filtering parameters to the input signal statistics. The VLSI filter features ... Sergio S aponara Department of Information Engineering, University of Pisa, Via Caruso, 56122 Pisa, Italy Email: sergio.saponara@iet.unipi.it Luca Fanucci Institute of Electronics, Information Engineering
Ngày tải lên: 23/06/2014, 01:20
Design of a Video Game docx
... bus and uses 6 output ports and 3 input ports for communication. address name 7 6 5 4 3 2 1 0 000 ADDR0 A7 A6 A5 A4 A3 A2 A1 A0 001 ADDR1 A1 5 A1 4 A1 3 A1 2 A1 1 A1 0 A9 A8 010 ADDR2 A2 3 ... 1: VGA and PS/2 interface Address R W 0000 - ADDR0 0001 - ADDR1 0010 - ADDR2 0100 DATA0 DATA0 0101 DATA1 DATA1 0111 STATUS COMMAND 1000 - OPAQUECOLOR 1001 - ALPHA 1A 1010 ALPHA1B ... images: OpaqueColor=”11111111” (white) Alpha 1a= ”0101” (on non-opaque spot, the opacity of first layer is 62,5%) Alpha 1a Alpha 2a Alpha1b X Opaq col 0 X + 1 = 3 3 4 4 Alpha1b=”1000”
Ngày tải lên: 27/06/2014, 00:20
Báo cáo y học: "Design of a trans protease lentiviral packaging system that produces high titer virus" pptx
... ACA ATA AAG ATA GGG GGG CAA TTA AAG GAA GCT CTA TTA GAT T 3', 5' CCG GAA TCT AAT AGA GCT TCC TTT AAT TGC CCC CCT ATC TTT ATT GTG ACG A 3', 5' GGG GTC GCT GCC AAA GAG TGA TCT GAG GGA AGC TAA AGG ... portion of PR and to create a stop at the end of PR are 5' GAA GAT CTA CGC GTT CCG GAG CAG ATG ATA CAG TAT TAG AAG 3' and 5' CGG AAT TCG GAT CCT TAA AAA TTT AAA GTG CAG CCA ATC TGA GT 3' Cells Human ... create a 463 bp fragment containing PR with a stop and EcoRI site The primers used for PCR are 5' GGG AAG ATC TGG CCT TCC CAC 3' and 5' CGG AAT TCG GAT CCT TAA AAA TTT AAA GTG CAG CCA ATC TGA
Ngày tải lên: 13/08/2014, 06:20
Báo cáo y học: "Chiropractic and self-care for back-related leg pain: design of a randomized clinical trial" docx
... using MathCAD software (Mathsoft Inc., Waltham, MA, USA) at PCCR to obtain the following parameters : (1) maximum ranges of motion in the sagittal, coronal, and axial planes and (2) average velocities ... sagittal, coronal, and axial planes from neutral to end ranges. Standing Postural Sway Postural sway data are collected using a method and protocol developed by Bhattacharya et al [85] and adapted ... Open Access Chiropractic and self-care for back-related leg pain: design of a randomized clinical trial Craig A Schulz 1* , Maria A Hondras 2 , Roni L Evans 1 , Maruti R Gudavalli 2 , Cynthia R
Ngày tải lên: 13/08/2014, 15:21
Báo cáo sinh học: " Streamlined design of a self-inactivating feline immunodeficiency virus vector for transducing ex vivo dendritic cells and T lymphocytes" ppsx
... lauravannucci@biomed.unipi.it; Alessia Ravani - alessiaravani@biomed.unipi.it; Francesca Bonci - f.bonci@kedrion.com; Flavia Chiuppesi - flo83@email.it; Barbara Del Santo - barbaradelsanto@biomed.unipi.it; ... vector for transducing ex vivo dendritic cells and T lymphocytes Mauro Pistello*, Laura Vannucci, Alessia Ravani, Francesca Bonci, Flavia Chiuppesi, Barbara Del Santo, Giulia Freer and Mauro Bendinelli ... Inactivation of LTR mediated transcrip- tion was ascertained by amplifying cDNA of transduced cells with INs and RREas primers (Fig. 3C). Reverse tran- scription was carried out with an avian
Ngày tải lên: 14/08/2014, 19:22
A site specific design of a fixed pitch fixed speed wind turbine blade with multiple airfoils as design variable
... indicates that the designed airfoils have a maximum aerodynamic efficiency lower than that of the S809’s, however they have larger values for a larger range of the angles of attack This is a possible ... that the angles of attack in the airfoils go from around degrees to around 22 This indicates that instead of a maximization of the Cl /Cd of the airfoil for a given alphadesign, the optimization ... degrees to around 22 This indicates that instead of a maximization of the Cl /Cd of the airfoil for a given alphadesign, the optimization should be implemented for a range of angles of attack which
Ngày tải lên: 09/09/2015, 10:17
System on chip design of a high performance low power full hardware cabac encoder in h 264 AVC
... targeting at the Main profile of H.264/AVC standard, it can be easily scaled to the High profiles of the standard, because of very similar implementation schemes and design architectures of Main profile ... CABAC decoder and CAVLC codec of H.264/AVC and statistical (entropy) codec design of JPEG2000, or other similar data processing codec designs Although the proposed CABAC encoder is designed targeting ... nature of CABAC with strong data dependency and frequent memory access, it is not efficient to accelerate CABAC encoding by software optimization Therefore, hardware acceleration of CABAC encoding
Ngày tải lên: 10/09/2015, 15:50
Design of a promoter to enhance the stability of catalysts for hydrocarbon reactions 1
... effect of carbon and boron on the activity of a Ni catalyst”, accepted 7. Kong Fei Tan, Jing Xu, Armando Borgna, Mark Saeys, “First principles based design of a Fisher-Tropsch synthesis catalyst ... surface Carbon atoms are represented by smaller balls and Ni atoms are represented larger balls Left panel, 50% carbon... energies are relative to CH4 and H2O in the gas phase and calculated ... preferred adsorption sites for carbon atoms and can act as nucleation sites for the formation of graphene islands. On-surface carbon atoms are relatively unstable with binding energies of around
Ngày tải lên: 11/09/2015, 16:06
Design of a promoter to enhance the stability of catalysts for hydrocarbon reactions 2
... chemical processes of natural gas activation, such as steam reforming (SR) and catalytic partial oxidation (CPO) of natural gas (Twigg, 1996; Ponec and Bond, 1995). Natural gas is gaining importance ... content makes methane a particularly interesting raw material. Chemisorption and activation of methane on Ni catalysts is of considerable importance because SR and CPO of methane to produce syngas ... Models of catalytic surface The choice of an appropriate model to represent a catalytic surface or active site is important as it can have significant effects on the accuracy of results. Cluster calculations
Ngày tải lên: 11/09/2015, 16:06
Achilles design of a high capacity mesh network with directional antennas
... using directional antennas By making efficient use of directional antennas, for both transmission and reception, and spatial reuse in transmission, Achilles achieves the goal of a high capacity mesh ... representation of antenna radiation pattern of a directional and omnidirectional antenna 2.2 Azimuth pattern showing the dB beamwidth 2.3 Block diagram of a ... ACHILLES: DESIGN OF A HIGH CAPACITY MESH NETWORK WITH DIRECTIONAL ANTENNAS SUKANTA KUMAR HAZRA (B.Eng (Hons.) NUS) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING DEPARTMENT OF
Ngày tải lên: 26/09/2015, 10:51
Design of a wide input supply range buck boost converter
... high gain comparator which has a small delay will in general result in a smaller output ripple voltage and a more accurate output. There are many ways to realize a comparator and using an amplifier ... 75dB and has a phase margin of more than 80 degrees typically. And it has a worst case phase margin of about 64 degrees. Also the 3dB frequency attained is close to the value calculated earlier. - - – – - - 5-9: ... have a large closed-loop bandwidth or to use a large output capacitor at its output. LDO regulators incorporating a small output capacitor typically have a dominant pole at one of the internal
Ngày tải lên: 04/10/2015, 15:44
Design of a broad band distributed amplifier and design of cmos passive and active filters
... DESIGN OF A BROAD-BAND DISTRIBUTED AMPLIFIER AND DESIGN OF CMOS PASSIVE AND ACTIVE FILTERS DALPATADU K. RADIKE SAMANTHA Beng (Hons), NUS NATIONAL UNIVERSITY OF SINGAPORE 2011 DESIGN OF A ... Conversion Channel Selection Frequency Conversion Channel Selection Analog A/ D Digital Analog A/ D Digital Analog A/ D Digital Analog A/ D Digital Software Digital Filtering Analog Filtering a) ... S – parameters of the amplifier are obtained by using ABCD parameters as shown below. (4.5) Where, At is the ABCD parameters of the measured attenuators A0 is the ABCD parameters of the Amplifier A1
Ngày tải lên: 12/10/2015, 17:34
Mechanical design of a small all terrain robot
... SOFTWARE MODULE SYSTEM INTEGRATION OF MCC A7 A7 A7 A9 A1 8 A1 8 A1 9 A1 9 A2 1 A2 1 A2 2 A2 2 A2 3 Master of Engineering Thesis Mechanical Design of a Small All-Terrain Robot E MODULAR PAYLOADS E.1 PAN-TILT ... MECHANICAL DESIGN OF A SMALL ALL-TERRAIN ROBOT TOH SZE WEI DEPARTMENT OF MECHANICAL ENGINEERING NATIONAL UNIVERSITY OF SINAGPORE 2002 MECHANICAL DESIGN OF A SMALL ALL-TERRAIN ROBOT TOH ... spirit and assistance for integration with various aspects of the robot Master of Engineering Thesis Mechanical Design of a Small All-Terrain Robot C Page iv TABLE OF CONTENTS A ABSTRACT I B ACKNOWLEDGEMENTS
Ngày tải lên: 10/11/2015, 12:35
Tài liệu Design of a USB Device Driver ppt
... direction Specifies data direction ? ? Data - DATA0, DATA1 Data - DATA0, DATA1 – – 0 - 1023 bytes 0 - 1023 bytes ? ? Handshake - ACK, NAK, STALL Handshake - ACK, NAK, STALL – – Report status of data transaction Report ... Token Data Packet Data Packet Data Packet Data Packet ACK ACK Data Packet Data Packet ACK ACK 20 39 ? ? Message Interface used to send notification to Message Interface used to send notification ... 1 DATA0/ DATA 1 T/O ACKACK DATA0/ DATA1 DATA0/ DATA1 ACK STALLNAK T/O DATA0 ACK T/O Function Function Host Host Token Token Idle Idle Handshake Handshake Data Data IN OUT SET 8 There are Four Types of...
Ngày tải lên: 13/12/2013, 00:15
Tài liệu Design of a Powerline Home Automation System pdf
... complete absence of the carrier, the modulation delay from a logic low to high input, was measured as 180 µs. The time delay between data input, modulation, demodulation and data output was measured ... home alarm system, but merely illustrates that the home automation system can interface with a larger existing alarm system. The alarm interface unit provides the home alarm system with an arm/disarm ... Chan [3] also found that a large amount of noise enters the line at frequencies of 400 kHz and higher, as this band corresponds to the AM radio band, where the powerline wiring acts as a good...
Ngày tải lên: 19/01/2014, 20:20
Tài liệu SCRIBE: The design of a large-scale event notification infrastructure? doc
... router-based multicast approaches and the lack of wide deployment of IP multicast limits their ap- plicability. As a result, application-level multicast is gaining popularity. Appropriate algorithms ... Appropriate algorithms and systems for scalable subscription management and scalable, reliable propagation of events are still an active research area [8–11]. Recent work on peer-to-peer overlay networks offers a ... 2001. 15. S. Ratnasamy, P. Francis, M. Handley, R. Karp, and S. Shenker. A Scalable Content- Addressable Network. In Proc. of ACM SIGCOMM, August 2001. 16. E. Zegura, K. Calvert, and S.Bhattacharjee....
Ngày tải lên: 19/02/2014, 18:20