vibration natural frequency forcing frequency and resonance

... parameters and natural frequencies of woven fiber Glass/Epoxy cantilevered composite plates and compared with the developed computer program based on FEM, and determined the natural frequency and mode ... fraction of resin, powder and short fiber reinforcement of samples studied in experimental investigation to evaluate the natural frequency And, Tables and shows the natural frequency of plate samples ... fundamental natural frequency, as shown in Tables to The experimental values of fundamental natural frequency were averaged by indicating two positions: central and lateral on the tested plates and applying...

Ngày tải lên: 09/09/2015, 10:06

... parameters, and wrote the manuscript; PAD, CMG, RCG, and TSG designed, performed or analyzed in vitro ultrasound experiments, MGO, PAD, GJM and DCS analyzed data and directed Pilot Studies and Study ... necropsies and supervised all animal experiments performed at ILS; EJRS and KGH treated animals, performed necropsies and analyzed sperm All authors participated in experimental design and read and ... [26,27], and in the United States there are about 247 thousand collisions each year between deer Page 13 of 15 and automobiles that damage approximately billion dollars in property and kill approximately...

Ngày tải lên: 05/03/2014, 17:20

... frequency FM band (88–108 MHz), ultra high frequency television band (470–890 MHz) and the satellite television band (11.6 to 12.4 GHz) The frequencies2 quoted above are approximate figures and ... radio frequency and high frequency communication circuits; One hertz (Hz) means cyclic vibration per second: kHz = 1000 cyclic vibrations per second, MHz = 000 000 cyclic vibrations per second, and ... operated at a fixed frequency of 10.650 GHz The resultant first i.f frequency bandwidth range is 950 to 1750 MHz and is really the r.f band translated to a lower frequency band This i.f is then...

Ngày tải lên: 18/04/2014, 12:24

... Chinese and Spanish families [11-13] The 1555A > G and 1494C > T mutations are located at the highly conserved A-site of 12S rRNA [4,11] The A1555 and C1494 (equivalent to positions 1491 and 1409 ... to 100% (752C > T and 747A > G variants) In particular, CI of 18 variants including 1555A > G and 1494C > T mutations were >78%, CI of other 13 variants was between 78% and 50% and CI for the remaining ... 1555A > G and 1494C > T mutations, the novel 747A > G variant and the known 839A > G, 1027A > G, 1310C > T and 1413T > C variants [22,34], which are absent in the 449 Chinese controls and whose...

Ngày tải lên: 18/06/2014, 16:20

... GATGAGCAAAAACTCC Figure Chromatogram and frequency of A insertions and point mutations in rhMPV/ΔM2-2 compared to rhMPV Chromatogram and frequency of A insertions and point mutations in rhMPV/ΔM2-2 ... participated in cloning and recovery of the viruses MM and JG performed the immunization and challenge experiments in hamsters RS and RT contributed to experimental designs of the study and writing of ... Miranda de Graaf, James Simon and Eric Claasen at Erasmus Medical College in The Netherlands for their thoughtful discussions and expertise Nancy Ulbrandt, JoAnn Suzich and George Kemble at MedImmune,...

Ngày tải lên: 20/06/2014, 01:20

... which is a data and fundamental frequency dependent filter bank It can be used to estimate the fundamental frequency by evaluating the output power of the filterbank for a set of candidate fundamental ... fundamental frequency and the Lk amplitudes and phases, respectively The determinant of the Hessian in (79) can be written as Gk = K−2 KN Gk KN N (81) By observing that KN Gk KN = O(1) and taking ... ζ l l l which is real and positive since R and Hermitian, and the vector Lk ξ l = zk = O l−1 (118) + βl ζ l ζ H −ζ l l , −ζ H l (119) using which the estimators in (38) and (42) along with the...

Ngày tải lên: 21/06/2014, 03:20

... frequencies Estimated frequency (a) (b) Figure 7: Root mean square estimation error versus tracking frequency with initial K = random (a) Frequency tracking and (b) RMSE of frequency tracking The ... + a2 )i, where a1 and a2 are normally distributed with zero mean and a variance of 0.05 The initial transition time K is set randomly between and M As shown in Figure 7, the frequency estimation ... For instance, K may be fixed first and the ω1 and ω2 that maximize the objective function are computed; after ω1 and ω2 have been estimated, ω1 and ω2 are fixed and then K is estimated After many...

Ngày tải lên: 21/06/2014, 08:20

... band, (HH) the high frequency band, (LH) the low-high frequency band, and (HL) the high-low frequency band For image quality purpose, the frequency bands (LL) and (HH) are not suitable to use ... Dogahe, and M G Amin, “Image-adaptive watermarking using 2D chirps,” Signal, Image and Video Processing, vol 4, no 1, pp 105–121, 2010 [10] L Le and S Krishnan, “Time -frequency signal synthesis and ... however, the most important ones are time and frequency domain representations These two representations and their related classical methods such as autocorrelation and/ or power spectrum proved to be...

Ngày tải lên: 21/06/2014, 08:20

... denoted as Cabn HF and Cabn for LF and HF groups, respectively where ftLF and ftHF are the input feature vectors, and THF and TLF are the total numbers of test feature vectors for HF and LF components, ... resolution, and cross-term free TFD As explained in Appendix A, MP-TFD decomposes the signal into Gabor atoms with a wide variety of modulated frequency and phase, time shift and duration, and adds ... The frequency marginal is satisfied by multiplying and then dividing the TFD by the desired and the current frequency marginal: V (1) t, f = V (0) t, f m0 f , p(0) f (7) where p(0) ( f ) is the frequency...

Ngày tải lên: 21/06/2014, 19:20

... (θFA ), and the user-specific frequency shift (θFS ): θS = θMM + θFA + θFS , (17) where θFA = M1 N +1 · + 2M · 2, Figure 6: Number of real multiplications for DFT-S-OFDMA (θR and θR2 ) and SCiFI-FDMA ... transmission in a future communication system SCiFI-FDMA is based on frequency and time domain interpolation and a user-specific frequency shift It was shown that the SCiFI-FDMA structure is able ... Benyamin-Seeyar, and B Eidson, Frequency domain equalization for single-carrier broadband wireless systems,” IEEE Communications Magazine, vol 40, no 4, pp 58–66, 2002 [6] D Galda and H Rohling,...

Ngày tải lên: 21/06/2014, 22:20

... distributed random phase, and N is the number of independent samples collected by the array fk is the kth source’s digital frequency (between −0.5 and 0.5) normalized to the sampling frequency Fs ... number of ESPRIT-based angle and frequency estimation methods have been proposed Lemma et al presented joint angle -frequency estimation method using multidimensional and multiresolution ESPRIT ... also presented in [19] In fact, frequency estimation is a fundamental problem in estimation theory and its applications include radar, array signal processing, and frequency synchronization For...

Ngày tải lên: 22/06/2014, 23:20

... chapters and seven appendices, using a topdown approach It begins with an introduction to frequency bands, RF and microwave devices, and applications in communication, radar, industrial, and biomedical ... next to synthesize Butterworth- and Chebyshev-type low-pass ®lters It includes impedance and frequency scaling techniques to realize high-pass, band-pass, and band-stop networks The chapter concludes ... Frequency converters, 517 Frequency deviation coef®cient, 526 Frequency divider, 486 Frequency division multiplexing, 513 Frequency modulation Carson rule bandwidth, 527 frequency deviation coef®cient,...

Ngày tải lên: 04/07/2014, 07:46

... E1 (virulent to Robusta and avirulent to Ogy and Candicans), of E2 (virulent to Robusta and Ogy and avirulent to Candicans), and of E3 (virulent to Robusta and Candicans and avirulent to Ogy) If ... detected (Pinon and Peulon, 1989) In Australia, several races of M medusae Thuem and M larici-populina were described (Sharma and Heather, 1976; Chandrashekar and Heather, 1980) and in the United ... Belgium (Steenackers, 1982) and in the Netherlands (Pinon et al, 1987) Race E3 was first described in the Lorraine (Pinon and Peulon, 1989) and is probably present in the west and southwest of France...

Ngày tải lên: 08/08/2014, 23:22

... follow-up and 4700 have initiated ART according to WHO and Uganda Ministry of Health guidelines The clinic has 15 exam rooms and is staffed by 20 physicians, 30 nurses, and 10 counselors and patients ... and sustained HIV-RNA viral load ≤ 400 copies per ml at 6, 12 and 24 months The chi square test was used to compare the baseline clinical characteristics of patients with and without SO-CD4 and ... reconstitution After 6, 12 and 24 months of ART, 380 (68%), 339 (61%) and 309 (55%) had attained and sustained HIV-RNA viral suppression Of these, 78 (21%), 151 (45%) and 166 (54%) respectively...

Ngày tải lên: 10/08/2014, 05:21

... alcohol, cannabis and cocaine (2004: 37.2% 11.6% and 10.1%, respectively; 2009: 43.0%, 16.8% and 11.5%, respectively) and decreased for ecstasy and amphetamines (2004: 19.5% and 19.4%, respectively; ... CH-8031, Switzerland 2City of Zurich, Social Facilities and Operations, Addiction and Drugs, “Streetwork” Youth Advisory Service, Wasserwerkstr 17, Zurich, CH-8006, Switzerland Authors’ contributions ... Checking users Between 2001 and June 2010, the onsite laboratory was present on 84 events, and the DIZ was open on 172 days A total of 7,622 consultations were completed, and 2,055 high-pressure...

Ngày tải lên: 11/08/2014, 18:20

... cohesive items with the highest frequency were and , „also‟ and „or‟ Among adversative devices, „but‟ was used with the highest frequency, while „on the contrary‟, and „instead‟ occurred very little ... (Blakemore 1987; 1992; 2002), DISCOURSE OPERATORS (Redeker 1991), and CUE PHRASES (Knott 2000; Knott and Sanders 1997; Sanders and Noordman 2000) Other less frequent terms include discourse particles, ... comes in its natural process: gathering vocabulary and ideas for a topic, brainstorming and outlining, writing, and editing This course aims at equipping students with fundamental understanding of...

Ngày tải lên: 02/03/2015, 14:26

... comes in its natural process: gathering vocabulary and ideas for a topic, brainstorming and outlining, writing, and editing This course aims at equipping students with fundamental understanding of ... frequency usage of discourse markers and argumentative writing kills and subjects of the study are 38 second-year students at Business English Department, National Economics University Aims and ... finished the two exams, I collected and analyzed errors they committed in those papers The errors then were identified and categorized and the most typical and common errors were presented In...

Ngày tải lên: 10/08/2015, 19:50

... simulated and measured antenna gain pattern of |Eφ | and |Eθ | at the φ = 0o and φ = 90o plane at 14GHz 4.107Comparison of the simulated and measured antenna gain pattern of |Eφ | and |Eθ ... spectral -frequency domain and the number of inverse FFT transform of the spectral -frequency domain transient fields It is faster than the existing method of multi-level block FFT algorithm and offers ... Irene and Miss Wang Yin for providing the fun, laughter and plentiful of constructive suggestions throughout my post graduate study I also like to thank my family for their understanding and support,...

Ngày tải lên: 11/09/2015, 16:06

... interventions and the frequency and usefulness of non-GAAP financial measures Committee: Ross G Jennings, Supervisor Keith C Brown Robert N Freeman Thomas W Sager Senyo Y Tse SEC interventions and the frequency ... 12 Schrand and Walther (2000) mention that these two services edit press releases only for grammar (such as commas, decimal points and AP style) and verify any changes with the firm 16 standard ... and encouragement of my husband, Augusto, and my grandmother, Maria Teresa, I would never have made it through this project Without Augusto’s constant companionship and help (in everything from...

Ngày tải lên: 30/09/2015, 16:44

... used as timer time-base to generate very low frequency PWM output Choosing Resolution and Frequency of PWM Output Actually, the resolution and the frequency of the PWM output is selectable within ... The frequency and resolution of the PWM outputs of the PIC17C42 can be traded off against each other to best suit the application The oscillator frequency can also be varied to adjust PWM frequency, ... may be an upper limit to the frequency if the PWM is being used to drive motors On the other hand, if the PWM is being filtered to PWM FREQUENCY vs RESOLUTION PWM frequency vs resolution for FOSC...

Ngày tải lên: 11/01/2016, 11:49