items accessories needed per student or per group

... 40 mL of a chlorine-disinfected drinking water sample for screening for THMs 500 ppm reference stock standard containing THMs in MeOH Items/ Accessories Needed per Student or per Group 1 1 42-mL ... least 15 for the detector to warm up and stabilize Ask your laboratory instructor for assistance if necessary Observe the © 2006 by Taylor & Francis Group, LLC Specific Laboratory Experiments ... gasoline-contaminated groundwater for BTEX determination 40 mL of an unknown sample prepared by the staff for BTEX determination Items/ Accessories Needed per Student or per Group 10 22-mL glass headspace...

Ngày tải lên: 11/08/2014, 21:21

... Health (NIH) for R01 grants (AR 45172, AR52353) The authors are grateful to the laboratories of Drs G Lust and (late) N Burton-Wurster (James A Baker Institute for Animal Health, Cornell University, ... interest for data acquisition The sections fixed on the mechanical stage were undisturbed over the entire period of data collection Experimental parameters were unaltered for the entire set of experiments ... infrared polarizer from PerkinElmer was inserted between the sample and the detector (and will be referred as "analyzer" from now onwards) For each tissue section, infrared imaging experiments were repeated...

Ngày tải lên: 20/06/2014, 01:20

... FADH) cofactor by direct absorption of near-ultraviolet or visible light or by Forster-type ¨ energy transfer from the MTHF antenna chromophore [26], the excited-state FADH) chromophore is believed ... as a chromophore This catalytically inactive form can be converted to the enzymatically active form by photoreduction Tryptophan 306 is believed to serve as the electron donor for this reaction ... respect to the chromophores, however, is a serious handicap for spectroscopic studies In order to obtain enzyme batches with reproducible absorption properties, we therefore decided to construct...

Ngày tải lên: 16/03/2014, 18:20

... 0.090 0.070 0.090 (worst case) (worst case) (best case) (best case) (worst case) (worst case) (best case) (best case) 5.1 The Periodogram The Fourier Transform Estimator (FTE) for frequency components ... still performs well up to 180 Hz and, on the other hand, the TFBMPM performs better than the FTE even when FTE works, i.e., for D f greater than 460 Hz In Fig 23 the accuracy of the estimators ... 12 and 13 show the TFBMPM performance as a function of SNR and f2 f1 Figure 12 has been obtained for the worst case of u1 u2 according to (4.3.2.3), while Fig 13 corresponds to the best case...

Ngày tải lên: 26/03/2014, 00:29

... way to diagnose ovarian cancer with certainty is an exploratory operation But it is not possible in cases when the woman is in poor health or the disease is advanced Current screening techniques ... http://www.ovarianresearch.com/content/3/1/27 absorption bands indicate the presence of new proteins as well as changes in their conformation and composition Spectral absorption patterns observed for major biomolecules; nucleic ... Technology, New Delhi, India for providing the financial support (Grant No DST/TSG/PT/2006/50) Author details Optical Radiation Standards, National Physical Laboratory, (Council of Scientific and...

Ngày tải lên: 20/06/2014, 07:20

... you for your help and support for these past few years I wish to thank Mr Conrado Wu of the Chemistry Department Glassblowing workshop for fabricating all the glassware equipment for my experiments; ... or broadband light irradiation for generation of the reactive species such as O or Cl atoms Fourier-Transform Infrared (FTIR) absorption spectroscopy is then used for the detection and monitoring ... as replacements for chlorofluorocarbons (CFCs) The halogenated alkoxy radicals are key intermediates for the tropospheric removal of HFCs and HCFCs It is important that laboratory measurements...

Ngày tải lên: 15/09/2015, 17:11

... relative error for the electrostatics pressure is then Error p = σ  p Error σ = Error +  Error  σ p Exact σ Exact  Exact   (4.31) Similarly, the relative error for the electrostatics force can ... 5.21 Relative percentage errors for the electrostatic force on the cube face at distance d = 0.5 72 Figure 5.22 Relative percentage errors for the electrostatic force on the ... the error of σ Suppose the numerical solution for σ is expressed as σ Numerical = σ Exact + σ Error (4.27) Hence, relative error for σ and the capacitance are simply given by Error σ = Error C...

Ngày tải lên: 15/09/2015, 21:09

... property 310 FAST FOURIER TRANSFORM AND ITS APPLICATIONS Periodicity Because of the periodicity property shown in Figure 7.1, the DFT and IDFT produce periodic results with period N Therefore ... z-transforms, the DFT has several important properties that enhance its utility for analyzing finite-length signals Many DFT properties are similar to those of the Fourier transform and the z-transform ... representing the waveform, which clearly reveals information about the frequency content of the waveform itself 7.1.2 Important Properties of DFT The DFT is important for the analysis of digital...

Ngày tải lên: 28/10/2013, 05:15

... postprocessing were performed using Bruker xmass 5.0.1 6.0.1 software Titration experiments MS titration experiments were performed in order to determine binding constants for xylanasethioxylo-oligosaccharide ... (Origin Laboratory Corp., Northampton, MA, USA) Briey, starting from the given set of parameters, the sum of squared residuals of Eqn (3) from the experimental data points was minimized by performing ... inhibitor concentration ẵL ẳ ẵLinitial rẵPinitial 5ị To obtain values for Ka and Knsp, nonlinear curve ttings based on the LevenbergMarquardt algorithm were performed using Microcal origin 6.1 (Origin...

Ngày tải lên: 07/03/2014, 17:20

... outweighs the smearing of the formants 4.3 Multiorder Multiplication Since different optimal orders are needed for different harmonics, we can calculate the FrFT with the orders corresponding to N1 , N2 ... for all vowels except [a] For the vowel [a], the FrFT-MFCC always performs worse than MFCC This is possibly because the first formant of [a] is much higher than in the other vowels A higher formant ... the opposite for [i], whose first formant is quite low and the second formant is rather high The smearing effect prevails in the combination of the corresponding two orders When more “formants” are...

Ngày tải lên: 21/06/2014, 20:20

... Taylor transform operator to yield simpler and more efficient transforms In [13], the mathematical theory was summarised and extended by Epton and Dembart for the multipole translation operators ... like the case for the indirect BEM For this direct formulation, two matrix-vector product and one vector subtraction need to be performed within each iteration 3.2 3.2.1 FFTM for Laplace equation ... transform (FFT), to accelerate the far field computation The FFTM algorithm was initially developed to solve the indirect BEM formulation for the Laplace equation In this work, a new formulation for...

Ngày tải lên: 11/09/2015, 16:06

... transform, is extensively used in Digital Signal Processing, such as: Fourier transform, Laplace transform, Z transform, Hilbert transform, Discrete Cosine transform, etc Just what is a transform? ... contain the basis function In order for this correlation algorithm to work, the basis functions must have an interesting property: each of them must be completely uncorrelated with all of the others ... transforms A signal may be continuous or discrete, and it may be periodic or aperiodic Together these define four possible combinations, each having its own version of the Fourier transform The...

Ngày tải lên: 13/09/2012, 09:49

... that correlation can be performed as a convolution This is done by flipping one of the signals left-for-right In mathematical form, a[ n ] t b[n ] is convolution, while a[ n ] t b[& n ] is correlation ... view of the world because they never result in portions of one period moving into another period In these cases, looking at a single period is just as good as looking at the entire periodic signal ... electronics A detector or demodulator circuit is then used to convert the waveform in (e) back into the waveform in (a) Since the time domain signals are multiplied, the corresponding frequency...

Ngày tải lên: 13/09/2012, 09:49

... domain being periodic with a period of N In other words, if one domain is discrete, the other domain must be periodic, and vice versa This holds for all four members of the Fourier transform family ... distorted by poking in the tops of the peaks Figure (d) shows the result of this distortion in the frequency domain Because the distorted signal is periodic with the same frequency as the original ... important in DSP, because the rectangular pulse in the frequency domain is the perfect low-pass filter Therefore, the sinc function described by this equation is the filter kernel for the perfect...

Ngày tải lên: 13/09/2012, 09:49

... with the original signal They should be identical, except round-off noise (a few parts -per- million for single precision) The second test of proper operation is that the signals have the correct ... or 70 microseconds per point This is more than 300 times faster than the DFT calculated by correlation! Not only is N Log2 N less than N , it increases much more slowly as N becomes larger For ... use symmetry as a check for proper operation These algorithms force the imaginary part of the time domain to be zero, and the frequency domain to have left-right symmetry For debugging, check that...

Ngày tải lên: 13/09/2012, 09:50

... This can be tacked-on to the forward transform, the inverse transform, or kept as a separate step between the two For the real Fourier transform, an additional factor of two is required (2/N), ... transforms: the Discrete Fourier Transform (discrete, periodic), the Discrete Time Fourier Transform (discrete, aperiodic), the Fourier Series (continuous, periodic), and the Fourier Transform ... polar form, the most common for DSP & j 2B k n /N j x [n] e N n' N& X [k] ' Alternatively, Euler's relation can be used to rewrite the forward transform in rectangular form: EQUATION 31-6 The forward...

Ngày tải lên: 13/09/2012, 10:20

... = T ∫ f (t )e −T − jk ω 0t dt • Phân tích liên tục: 27 PDF created with pdfFactory Pro trial version www.pdffactory.com TRƯỜNG ĐHBK TP.HCM-năm2007 LUẬN VĂN TỐT NGHIỆP ∞ ∑ ak e jkω0t = x (t ) ... g ω ,τ (t ) f (t ) với g ω ,τ (t ) = ω (t − τ )e jωt 28 PDF created with pdfFactory Pro trial version www.pdffactory.com (2.22) TRƯỜNG ĐHBK TP.HCM-năm2007 LUẬN VĂN TỐT NGHIỆP Mỗi hàm thành phần ... số Đối với số tín hiệu cần mềm dẻo STFT không đáp ứng 29 PDF created with pdfFactory Pro trial version www.pdffactory.com TRƯỜNG ĐHBK TP.HCM-năm2007 LUẬN VĂN TỐT NGHIỆP 2.5 BIẾN ĐỔI WAVELET: 2.5.1...

Ngày tải lên: 01/04/2013, 16:14

... below has one or two blanks, each blank indicating that something has been omitted Beneath the sentence are five lettered words or sets of words Choose the word or set of words for each blank ... label, or the intersection of two or more lines or curves Points on a line or curve are assumed to be in the order shown; points that are on opposite sides of a line or curve are assumed to be oriented ... high-powered machine is thought to give more interesting or emotive results, to leave more room for creative accident For example, it has been virtually a point of honor for many photographers, including...

Ngày tải lên: 16/08/2013, 16:24

Ngày tải lên: 13/12/2013, 12:15

Ngày tải lên: 17/01/2014, 03:20