frequency high frequency and wavenumber unit conversions

da silva, e. (2001). high frequency and microwave engineering

Ngày tải lên : 18/04/2014, 12:24

... comments High Frequency and Microwave Engineering has been written with a view to ease of understanding and to provide knowledge for any engineer who is interested in high frequency and microwave ... (522–1622 kHz), short-wave (3–30 MHz), very high 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 ... to the design of Butterworth and Tchebyscheff filters and their uses as low pass, bandpass, high pass and bandstop filters Impedance matching is discussed in detail and many methods of matching...

440
1.9K
0

báo cáo khoa học: " Drug Checking: A prevention measure for a heterogeneous group with high consumption frequency and polydrug use - evaluation of zurich’s drug checking services" potx

Ngày tải lên : 11/08/2014, 18:20

... 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; ... users with high lifetime prevalences, high consumption frequency, polydrug use and negative experiences regarding their consumption Based on the actual knowledge about the side effects and the long-term ... 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 liquid...

6
267
0

Therapeutic ultrasound as a potential male contraceptive: power, frequency and temperature required to deplete rat testes of meiotic cells and epididymides of sperm determined using a commercially available system doc

Ngày tải lên : 05/03/2014, 17:20

... Wet heat 42.6 ± 0.1 23 ± 22 ± 5.8 Low freq., high power 40.5 ± 1.2 84 ± § 54 ± High freq., high power 41.8 ± 0.6 1.9 ± 0.9 † 0.3 ± 0.3 High freq., high power, Na+ Low freq., low power nd 42.1 ... temperature, high power and high frequency was the most effective method for reducing sperm count Variation between ultrasound transducers A direct comparison between our treatments and those of ... [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...

15
967
0

Báo cáo hóa học: " Frequency and spectrum of mitochondrial 12S rRNA variants in 440 Han Chinese hearing impaired pediatric subjects from two otology clinics" ppt

Ngày tải lên : 18/06/2014, 16:20

... 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...

11
616
0

Báo cáo hóa học: " Deletion of human metapneumovirus M2-2 increases mutation frequency and attenuates growth in hamsters" potx

Ngày tải lên : 20/06/2014, 01:20

... 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 ... (Figure 3B) Thus, by passage 4, both rhMPV and rhMPV/ ΔM2-2 contained heterogeneous subpopulations and rhMPV/ΔM2-2 had a higher frequency of transition mutations and a propensity for insertion of A ... regions such as N/P and F/M2 were less pronounced and monocistronic transcripts predominated The genes immediately upstream and downstream of the M2 and SH transcription units also existed predominantly...

14
435
0

Báo cáo hóa học: " Joint fundamental frequency and order estimation using optimal filtering" pot

Ngày tải lên : 21/06/2014, 03:20

... 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...

18
297
0

Báo cáo hóa học: " Research Article Robust Blind Frequency and Transition Time Estimation for Frequency Hopping Systems" doc

Ngày tải lên : 21/06/2014, 08:20

... 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...

13
289
0

Báo cáo hóa học: "Research Article Time-Frequency and Time-Scale-Based Fragile Watermarking Methods for Image Authentication Braham Barkat1 and Farook Sattar (EURASIP Member)2 1 Department 2 Faculty" pdf

Ngày tải lên : 21/06/2014, 08:20

... represents the low frequency 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 ... 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 ... number of timefrequency points in the respective TFDs under consideration The value of r belongs to the interval [−1,1], and is equal to unity if the TFD of the extracted watermark and that of...

14
377
0

Báo cáo hóa học: "Research Article A Joint Time-Frequency and Matrix Decomposition Feature Extraction Methodology for Pathological Voice Classiﬁcation" doc

Ngày tải lên : 21/06/2014, 19:20

... number of samples, and M is the frequency resolution of the constructed TFD, for example, given an 81.92 ms frame with sampling frequency of 25 kHz, N is 2048 and the highest possible frequency resolution, ... 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, ... marginal conditions and can be considered as a true joint distribution of time and frequency The utilized TFD is a segment free TF approach, and it provides a high- resolution and cross-term free...

11
223
0

Báo cáo hóa học: " Research Article Localized Mode DFT-S-OFDMA Implementation Using Frequency and Time Domain Interpolation" doc

Ngày tải lên : 21/06/2014, 22:20

... 1), and the mod stands for modulo operation The input-output relation of the localized mode DFT-S-OFDMA cannot be simpliﬁed as much as in the case of the distributed mode and this results in a higher ... (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 ... 3) Figure 7: Number of real additions for DFT-S-OFDMA (φR and φR2 ) and SCiFI-FDMA (φS (γ = 2) and φS (γ = 3)) additions can be quite high for larger values of K but this is typically not considered...

9
296
0

Báo cáo hóa học: "Frequency and 2D Angle Estimation Based on a Sparse Uniform Array of Electromagnetic Vector Sensors" pptx

Ngày tải lên : 22/06/2014, 23:20

... 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 ... array and M = 4, L = All the signal source’s energy P is unity and n0 = The intersensor spacing is chosen as Δ = 10 ∗ λmin /2 (λmin = c/( fmax Fs )) except for the example in Figures and Figures and ... 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...

9
215
0

radio frequency and microwave communication circuits

Ngày tải lên : 04/07/2014, 07:46

... 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 ... in the very high frequency (VHF) band; and channels 18±90 operate in ultra high frequency (UHF) band Table 1.3 shows the band designations in the microwave frequency range Figure 1.1 Atmosphere ... Advantages L-band transmitters for telemetry systems and phased-array radar systems; transmitters for communication systems C, X, and Ku-band ECM ampli®ers for wideband systems; X and Ku-band transmitters...

588
306
0

Báo cáo khoa học: "Frequency and evolution of Melampsora larici-populina Klebahn" potx

Ngày tải lên : 08/08/2014, 23:22

... 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 States, ... 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...

15
249
0

Báo cáo y học: "Sub-optimal CD4 reconstitution despite viral suppression in an urban cohort on Antiretroviral Therapy (ART) in sub-Saharan Africa: Frequency and clinical significance" ppt

Ngày tải lên : 10/08/2014, 05:21

... 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 ... [11]; and

9
301
0

NGHIÊN CỨU MỐI QUAN HỆ GIỮA SỬ DỤNG DẤU HIỆU DIỄN NGÔN VÀ KĨ NĂNG VIẾT VĂN LUẬN CỦA SINH VIÊN TIẾNG ANH THƯƠNG MẠI TRƯƠNG ĐẠI HỌC KINH TẾ an investigation into correlation between discourse markers usage frequency and argumentative writing skills by stud

Ngày tải lên : 02/03/2015, 14:26

... The 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 ... (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, ... gathering vocabulary and ideas for a topic, brainstorming and outlining, writing, and editing This course aims at equipping students with fundamental understanding of the essay first, and then supplying...

56
696
0

An investigation into correlation between discourse markers usage frequency and argumentative writing skills by students at Business English Department, National Economics University

Ngày tải lên : 10/08/2015, 19:50

... gathering vocabulary and ideas for a topic, brainstorming and outlining, writing, and editing This course aims at equipping students with fundamental understanding of the essay first, and then supplying ... Business English Department not use the high frequency of discourse markers and that they used some particular Elaborative markers like and in a significantly higher manner than other markers This ... 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...

12
388
1

Electromagnetic simulations in frequency and time domain using adaptive integral method

Ngày tải lên : 11/09/2015, 16:06

... 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,...

316
196
0

SEC interventions and the frequency and usefulness of non GAAP financial measures

Ngày tải lên : 30/09/2015, 16:44

... 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...

119
219
0

AN0539 frequency and resolution options for PWM outputs

Ngày tải lên : 11/01/2016, 11:49

... 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, ... 8-bit high resolution PW1DCH PW1DCL Note: DC registers suited for 16-bit computation, using 10 MSb only generate an analog signal, higher frequency may be desirable In any case, the lowest frequency...

13
244
0

Handout and tapescript - Unit 9 - Listening

Ngày tải lên : 13/06/2013, 01:25

... die, and the land becomes desert In developing countries, 90 percent of the people use wood for cooking and heat They cut down trees for firewood But trees are important They cool the land under ... the land under them and keep the sun off smaller plants When leaves fall from a tree, they make the land richer When the trees are gone, the smaller plants die, and the land becomes desert Humans ... of the Sahara to stop the desert sand from spreading Mauritania planted a similar wall around its capital Iran puts a thin covering of petroleum on sandy areas and plant trees Other countries build...

2
1.1K
3