6effect of indirect lightning on a wind turbine
Optimal placement of horizontal - and vertical - axis wind turbines in a wind farm for maximum power generation using a genetic algorithm
Ngày tải lên :
05/09/2013, 17:03
... [4] of the wake and apply it to determine the wake of a VAWT Now, the cross-section area of the streamtube is a square of width 2R and height H instead of a circle From the conservation of momentum, ... Optimization of VAWT Wind Farm We consider VAWT with the geometric parameters shown in Table Case III has been taken from the paper of Yan et al [12] and Case III has a double rotor radius compared ... section demonstrate that the layout optimization of a wind farm of HAWT using GA gives a uniform grid arrangement similar that obtained by Grady et al [2]; this is different than that obtained by Mosetti...
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Atmospheric icing on large wind turbine blades
Ngày tải lên :
05/09/2013, 14:58
... simulated section's radius (r), the local speed ratio (λr) and the blade twist angle ( φ ) at that section The relative wind speed and angle of attack at each section is calculated by ; (V (1 − a ... induction factors, relative wind speeds and the angle of attacks at each selected section along the blade used for this study Table Test sections operating conditions Blade Section A B C D E Blade ... Numerical analyses of the air flow behaviour show a change in the velocity and pressure distribution along each selected section of the wind turbine blade Change of geometric characteristics at each...
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Báo cáo khoa học: Characterization of inhibitors of phosphodiesterase 1C on a human cellular system potx
Ngày tải lên :
07/03/2014, 05:20
... (Ambion Inc., Austin, TX, USA) [pool number M-007643– 00, sequences CCAAGGAGATTGAAGAATT (1), GAT CATGCACTGAAATTTA (2), GATGAAACCTCTCAA ACTG (3), and CATCATCGCTGGACAATGT (4)], using FEBS Journal ... lL of a substrate solution (Promega, Madison, WI, USA; CytoTox96 assay), and after 15 of incubation, an additional 50 lL of a stop solution Thereafter, extinction was measured at a wavelength of ... with an attenuated or even abolished increase in intracellular cAMP concentrations This demonstrates that the ionomycin-induced increase in intracellular Ca2+ concentration leads to activation of...
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Báo cáo hóa học: " Properties of nanocones formed on a surface of semiconductors by laser radiation: quantum confinement effect of electrons, phonons, and excitons" pptx
Ngày tải lên :
20/06/2014, 22:20
... excitons, phonons, etc.) in nanocone is a special case, since diameter of nanocone is a monotonous function of height, leading to gradual change of bandgap Graded bandgap structure has an effect on ... formation of nanocones on the irradiated surface of a semiconductor by selective laser heating of the top layer with following mechanical plastic deformation of the layer as a result of relaxation of ... of particles and quasi-particles, such as mobility and intrinsic concentration of electrons and holes, energy of excitons, phonons, and plasmons Therefore, study of nanocones’ formation mechanism...
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Báo cáo hóa học: "Research Article Experimental Investigation of Cooperative Schemes on a Real-Time DSP-Based " docx
Ngày tải lên :
21/06/2014, 20:20
... actually carrying payload data The results should be the same as in a case where synchronisation had occurred in a dedicated synchronisation phase The air interface employed for payload data is ... moment of selection and use The careful reader may have noticed that we have not started with a synchronisation phase as in the other approaches described above Instead, synchronisation is done ... the sequence of configurations in one measurement run The reader may note that some configurations are identical Each measurement run was conducted under stationary conditions, that is, there were...
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Báo cáo toán học: "Compositions of Random Functions on a Finite Set" ppt
Ngày tải lên :
07/08/2014, 06:23
... Chains and Random Walks on Graphs” http://stat.berkeley.edu/users/aldous [2] P.Diaconis and D.Freedman, Iterated Random Functions, SIAM Review 41 No 1, p 45–76 [3] J.C.Hansen and J.Jaworski, Large ... V.F.Kolchin, B .A. Sevastyanov, and V.P.Chistaykov, Random Allocations, Winston, 1978 [9] J S Rosenthal, Convergence Rates for Markov Chains, SIAM Review 37 387– 405 the electronic journal of combinatorics ... visited states T are a (non-uniform) random subset of S that includes at least two elements, namely sn and (with probability 1) s1 We prove later that T typically contains most of the small numbered...
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báo cáo khoa học: "The applicability of normalisation process theory to speech and language therapy: a review of qualitative research on a speech and language intervention" pps
Ngày tải lên :
10/08/2014, 11:20
... and language profession is considered to have a relatively strong research base in terms of quality of publications and percentage of international published contributions in biomedical scientific ... has four main categories: professional-patient relationships; new modalities for delivering care; social construction and production of evidence; and social organisation of clinical work According ... clear differences James Implementation Science 2011, 6:95 http://www.implementationscience.com/content/6/1/95 Page of 10 Table Relational integration, qualitative data on parents’ and practitioners’...
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báo cáo khoa học: " In vitro behaviour of endothelial cells on a titanium surface" doc
Ngày tải lên :
11/08/2014, 20:20
... clinical application Noteworthy, the evaluation of the interaction of cells and implanted materials must take into account other parameters in addition to the analysis of maintenance of cell viability ... Monoclonal antibodies: anti-human CD-31 (PECAM-1), anti-human vinculin (Sigma, USA); anti-human fibronectin receptor (Takara Biomedicals, Japan); anti-human vitronectin, anti-human vitronectin ... Dixit P, Hern-Anderson D, Ranieri J, Schmidt CE: Vascular graft endothelization: comparative analysis of canine and human endothelial cell migration on natural biomaterials J Biomed Mater Res 2001,...
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Báo cáo y học: "Comparison of the quality of chest compressions on a dressed versus an undressed manikin: A controlled, randomised, cross-over simulation study" pptx
Ngày tải lên :
13/08/2014, 23:21
... paired t-test Stata IC 10.1 (StataCorp, Texas, USA) was used for statistical analysis An a priori analysis was done and the necessary sample size was estimated as 11 subjects in each group based ... chest of an unconscious person (rather than a manikin) wearing three layers of clothes Each layperson was asked to place their hands in the middle of the chest of the person simulating cardiac arrest ... Education, Faculty of Health Sciences, Aarhus University, Brendstrupgaardsvej 102, DK-8200 Aarhus N, Denmark 3Division of Critical Care Medicine, University of Alberta, Edmonton, Alberta Q1, Canada Authors’...
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Estimating the annual range of global illuminance on a vertical south facing building facade
Ngày tải lên :
09/09/2015, 10:17
... campus building located in Canada, this paper seeks to estimate the annual range of global illuminance on a south facing vertical facade Building location and preliminary sun path study The building ... global vertical illuminance variation can be as high as 35KLx By estimating the varying global illuminance level on building surfaces specific to a building’s geographical location, and along ... nominal value of 0.2 typically assigned and 𝐸 𝑔𝑖 is the illuminance reflected off the ground in KLx The incident global solar radiation is then the sum of direct beam radiation, sky radiation, and...
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SUPERSOLIDS OF HARDCORE–BOSONS ON a TRIANGULAR LATTICE
Ngày tải lên :
30/10/2015, 19:59
... atoms cannot penetrate each other there exist only one atom at a time on a lattice site and consequently b+ i and bi are the operators of a hardcore bosons which obey the Bose commutation relations ... have the same absolute value of total magnetization: 1−∆ |m| = S (13) 1+∆ while mz = Notice that (13) and (14) mean that the supersolid phase appears in a all region of the anisotropy parameter ... WAVE THEORY The ground state has a non - trivial continuous degeneracy parameterized by A (non - trivial in that the Hamiltonian of the system does not have the same symmetries as the spin configurations),...
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Application of machine learning technique in wind turbine fault diagnosis
Ngày tải lên :
07/08/2017, 15:59
... practitioners and researchers Chapter PAPER 1- FAULT DETECTION IN WIND TURBINE: A SYSTEMATIC LITERATURE REVIEW Afrooz Purarjomandlangrudi, Ghavameddin Nourbakhsh, Mohammad Esmalifalak, Andy Tan4 ... this application Learn data collection and signal analysis, in preparation to use these for vibration analysis Step 2: Employing two sets of data; the first is a bearing data set with seeded fault ... status: Statement of contribution* Afrooz Purarjomandlangrudi Wrote the manuscript, experimental design, conducted experiments, and data analysis Date Ghavameddin Nourbakhsh Mohammad Esmalifalak Andy...
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Simulation Based Analysis of Container Operations on a Terminal
Ngày tải lên :
18/12/2017, 13:44
... simulation operational volume on the 11th day The data from these two days can be removed or used as failure data i) The main parameters of the containers There are five types of container used at ... yard planning, yard operation, control and vessel planning All terminals of Yes the Port of Nagoya are connected by LAN or WAN No wait The outbound trailer carries the container out of the gate ... Port of objects of this study Nagoya (1) General Description Table Capacity of Nabeta Pier Nabeta Pier Container Terminal is the largest terminal Berth No T1/T2 at the Port of Nagoya (Port of Nagoya,...
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DC bus control of variable speed wind turbine using a buck boost converter
Ngày tải lên :
03/01/2014, 19:15
... Hydro-Québec, Natural Resources Canada and the Natural Sciences and Engineering Research Council of Canada VII [1] REFERENCES C.L Kana; M Thamodharan and A Wolf; “System management of a wind- energy converter”, ... B K Bose, and R J Spiegal, “Design and performance evaluation of a fuzzy-logic-based variable-speed wind generation system,” IEEE Trans Ind Applicat., vol IA-33, pp 956– 964, July/Aug 1997 [10] ... scheme,” IEEE Trans Ind Applicat., vol IA-32, pp 57–65, Jan 1996 [7] R Chedid, F Mrad, and M Basma, “Intelligent control of a class of wind energy conversion systems,” IEEE Trans Energy Conv., vol...
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Research on a novel buck boost converter for wind turbine systems
Ngày tải lên :
03/01/2014, 19:16
... Iout1 ON ON Q1 ON Q2 ON ON D1 ON ON D2 t0 ON t1 Fig Operation waveforms in a positive half cycle Mode 3: Negative half cycle (NHC) discharge mode Mode follows Mode in a negative half cycle of the ... is 50V 232 analysis of the working principles, and computer simulation of the operation for this inverter have proved its feasibility for dc-ac conversion in wind turbine applications ACKNOWLEDGMENT ... range of input dc voltage for an improved energy output from variable wind turbine resources The input source and the output grid are separated based on flyback operation principles As compared...
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A site specific design of a fixed pitch fixed speed wind turbine blade with multiple airfoils as design variable
Ngày tải lên :
09/09/2015, 10:17
... Journal of Renewable and Sustainable Energy (2013) 063118 N Mittal, S Ahmed, N Tenguria, EVALUATION OF PERFORMANCE OF HORIZONTAL AXIS WIND TURBINE BLADES BASED ON OPTIMAL ROTOR THEORY Journal of ... Urban and Environmental Engineering (2011) 15-23 D .A Spera, Models of lift and drag coefficients of stalled and unstalled airfoils in wind turbines and wind tunnels National Aeronautics and Space ... 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 would likely hit the blade...
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CFD study of a twisted blade h darrieus wind turbine
Ngày tải lên :
09/09/2015, 10:32
... design and application of upwind schemes on unstructured meshes, Technical Report AIAA-89-0366, AIAA 27th Aerospace Sciences Meeting, Reno, Nevada, 1989 [13] S.V Patankar, Numerical Heat Transfer and ... [3] A Iida, K Kato, A Mizuno, in Numerical Simulation of Unsteady Flow and Aerodynamic Performance of Vertical Axis Wind Turbines with LES: Proceedings of the 16th Australian Fluid Mechanics Conference, ... Department, McMaster University [10] Takao M., Kuma H., Maeda T., Kamada Y., Oki M., Minoda A A Straight-bladed Vertical Axis Wind Turbine with a Directed Guide Vane Row - Effect of Guide Vane...
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An experimental investigation of clocking effects on turbine aerodynamics using a modern
Ngày tải lên :
05/07/2016, 14:26
... Some examples are blade tip behavior, heat-flux scaling, three-dimensional effects and performance calculations Because of limitations of the experimental apparatus, instrumentation, and data acquisition ... MacArthur, and Lt B Cohrs; Paper No AIAA-91-2131 AIAA/SAE/ASME/ASEE 27th Joint Propulsion Conference, June 24-26, 1991, Sacramento, CA FIELDS OF STUDY Major Field: Aeronautical and Astronautical Engineering ... “Influence of Vane-blade spacing on Transonic turbine Stage Aerodynamics: Part II: Time Resolved Data and Analysis”; J Busby, R Davis, D Dorney, M Dunn, C Haldeman, R Abhari, B Venable, R Delaney, ASME...
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Maximum power point tracking of a DFIG wind turbine system
Ngày tải lên :
10/05/2017, 23:02
... with wind- data-based methods, the MPPT ability of a wind turbine is appreciably high if accurate wind data is available However, because of the rapid natural fluctuation of wind, wind speed measurement ... require any perturbation signal However, for the high inertia of a generator wind turbine system, a wind turbine using the MPPT-curve method cannot track the maximum point as rapidly as a wind turbine ... about the wind data or an available anemometer These proposed schemes are based on the improvement of the wind turbine s MPPT curve and the adaptation of MPPT curve; their names are improved MPPT-curve...
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a study on grammatical features of indirect speech in enghlish with reference to their vietnamese equivalents
Ngày tải lên :
22/03/2018, 22:33
... speech in each language Determining the frequency of occurrence of each specific grammatical features of two languages Analyzing data is to arrange, classify grammatical features of indirect speech ... have no quotation marks and are introduced by a quotation frame which consists of an attributed speaker (he, she, the boss) and a verb of saying (said, asked), followed by a conjunction (that, ... following example “It was said that as a teenager Max had earned his pocket money by delivering newspapers” it is an extra posed subject and in “What neighbors said was that as a teenager he had earned...
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