infrared spectra of polyurethanes

... is the number of ml of HCl used for titration of the blank, S is the number of ml of HCl used for titration of the sample, N is the molarity of HCl solution, and W is the weight of the sample ... of moles of the polyol, npol, to be 1, r becomes the number of moles of the chain extender Number of moles of the diisocyanate, nISO, at the stoichiometric ratio of NCO/OH groups is the sum of ... molar ratio is desired Equivalent weight of polyols can be calculated from the known OH number: E¼ D 56,100 OH# ð44Þ Infrared Spectra of Polyurethanes Infrared spectroscopy is a powerful method...

Ngày tải lên: 13/08/2014, 16:21

... that often arises is that of the communication of the results of computer simulation experiment to other members of a community Quite often the necessary description of the technical substance of ... focus of this paper and form the mathematical point of view mention of the Boltzmann transport equation for the distribution function of some stochastic process is of interest The contents of chapter ... is an eclectic mix of applications of Monte Carlo methods in many fields of research should not be surprising, because of the ubiquitous use of these methods in many fields of human endeavor In...

Ngày tải lên: 29/06/2014, 13:20

... width of the peak) and spectral leakage (the amplitude of the tails) To explore the theoretical aspects of this in more detail, imagine an infinitely long discrete sine wave at a frequency of 0.1 ... DC value of one in the time domain will produce a peak of amplitude one in the frequency domain However, a sinusoid of amplitude one in the time domain will only produce a spectral peak of amplitude ... originating from any of several sources, including the analog electronics, or the ocean itself Above 70 hertz, the white noise rapidly decreases in amplitude This is a result of the roll-off of the antialias...

Ngày tải lên: 13/09/2012, 09:49

Ngày tải lên: 17/09/2012, 09:13

... concise summary of the present state of the art of the theory and practice of OFDM technology The authors believe that the time is ripe for such a treatment Particularly based on one of the author's ... on the received block of signal samples This form of OFDM is often referred to as Discrete Multi-Tone (DMT) The spectrum of the signal on the line is identical to that of N separate QAM signals, ... sequence of length N because the circular convolution of the two sequences has period of N Intuitively, an N -point DFT of a sequence corresponds to a Fourier series of the periodic extension of the...

Ngày tải lên: 02/03/2013, 16:58

... I I.1 I.2 II II.1 II.2 An overview of English morpheme Definition of Morpheme Type of morpheme An overview of Vietnamese morpheme Definition of Vietnamese morpheme .9 Derivational ... Phuong OUTLINE Part I: Introduction Rationale (reasons of the study) .3 Aims of the study .3 Scope of the study Methods of the study Part II: Development Chapter ... occurrences around making use of vocal sounds for the purpose of communication After that they showed the vocal sounds and sets of vocal sounds in written signals Because of these reasons, we decided...

Ngày tải lên: 08/04/2013, 09:31

... consisting of members of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine The National Research Council was established by the National Academy of ... subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of Sciences, the National Academy of ... the Institute of Medicine The National Academy of Engineering and the Institute of Medicine were established in 1964 and 1970, respectively, under the charter of the National Academy of Sciences...

Ngày tải lên: 13/12/2013, 01:15

... according to visual perception of distance 112 LIST OF FIGURES XIX 6.17 Two examples of a predened shape of a regionofinterest 112 6.18 Regionofinterest mask with three ... Chapter A critical discussion of the regionofinterest coding of JPEG2000 concludes the investigation of still images Chapter contains our major contribution: the application of the wavelet transform ... varied the concept of the transform Instead of keeping the size of the window xed and lling it with oscillations of different frequencies, he tried the reverse: He kept the number of oscillations...

Ngày tải lên: 25/12/2013, 05:17

... for example, in three of the four quadrants of the i-v characteristic and can therefore act as sources of energy for specific combinations of voltages and currents An example of this dual behavior ... amount of resistance, the magnitude of which depends on Part I Circuits the electrical properties of the material Resistance to the flow of current may be undesired—for example, in the case of lead ... terminals of a circuit element defines the behavior of that element within the circuit In this section we shall introduce a graphical means of representing the terminal characteristics of circuit...

Ngày tải lên: 19/01/2014, 19:20

... Illustration of Kirchhoff’s current law i3 The significance of Kirchhoff’s current law is illustrated in Figure 2.3, where the simple circuit of Figure 2.2 has been augmented by the addition of two ... of the circuit of Figure 2.3 is: −i + i1 + i2 + i3 = Kirchhoff’s current law is one of the fundamental laws of circuit analysis, making it possible to express currents in a circuit in terms of ... b A series of carefully conducted experimental observations regarding the nature of voltages in an electric circuit led Kirchhoff to the formulation of the second of his laws, Kirchhoff’s voltage...

Ngày tải lên: 19/01/2014, 19:20

... according to visual perception of distance 112 LIST OF FIGURES XIX 6.17 Two examples of a predened shape of a regionofinterest 112 6.18 Regionofinterest mask with three ... Chapter A critical discussion of the regionofinterest coding of JPEG2000 concludes the investigation of still images Chapter contains our major contribution: the application of the wavelet transform ... varied the concept of the transform Instead of keeping the size of the window xed and lling it with oscillations of different frequencies, he tried the reverse: He kept the number of oscillations...

Ngày tải lên: 19/01/2014, 19:20

... for example, in three of the four quadrants of the i-v characteristic and can therefore act as sources of energy for specific combinations of voltages and currents An example of this dual behavior ... amount of resistance, the magnitude of which depends on Part I Circuits the electrical properties of the material Resistance to the flow of current may be undesired—for example, in the case of lead ... terminals of a circuit element defines the behavior of that element within the circuit In this section we shall introduce a graphical means of representing the terminal characteristics of circuit...

Ngày tải lên: 19/01/2014, 20:20

... Illustration of Kirchhoff’s current law i3 The significance of Kirchhoff’s current law is illustrated in Figure 2.3, where the simple circuit of Figure 2.2 has been augmented by the addition of two ... of the circuit of Figure 2.3 is: −i + i1 + i2 + i3 = Kirchhoff’s current law is one of the fundamental laws of circuit analysis, making it possible to express currents in a circuit in terms of ... b A series of carefully conducted experimental observations regarding the nature of voltages in an electric circuit led Kirchhoff to the formulation of the second of his laws, Kirchhoff’s voltage...

Ngày tải lên: 19/01/2014, 20:20

... nonlinearities Some of these could be handled by extensions of the basic ICA algorithms, as reported in Part III of this book 446 OTHER APPLICATIONS Table 24.1 The prediction errors (in units of 0.001) ... mixing, the number of parameters can be very large: For example, the convolution may be modeled by filters of the length of 1000 time points, which effectively multiplies the number of parameters in ... basis of their managerial policies using only the cash flow time series data The data consisted of the weekly cash flow in 40 stores that belong to the same retail chain, covering a time span of 140...

Ngày tải lên: 20/01/2014, 11:20

... withdrawn as a result of changes in, additions to, accuracy of, unavailability of or inadequacy of information or for any reason Fitch Ratings deems sufficient The assignment of a rating by Fitch ... indication of the probability of default and of the recovery given a default of this debt instrument, The relationship between issuer scale and obligation scale assumes an historical average recovery of ... probability of support indicates a minimum Long-Term Rating floor of ‘BBB-’ 3: A bank for which there is a moderate probability of support because of uncertainties about the ability or propensity of the...

Ngày tải lên: 16/02/2014, 03:20

... Gevaert et al COFRADIC and protein modifications analysis of purine-binding proteins in a total lysate of human Jurkat T-cells [40] primary separation mAU 1400 COFRADIC analysis of protein processing ... the actual site of proteolytic cleavage, data interpretation and the design of followup analyses are straightforward COFRADIC-based sorting of N-glycosylated peptides Glycosylation of asparagines ... proteomics techniques [72], COFRADIC has a number of unique properties As COFRADIC is essentially a peptide-sorting technology by which only a set of peptides representative of the proteomic problem...

Ngày tải lên: 18/02/2014, 16:20

... Thus we may take account of i) and ii) by computing APPLICATIONS OF THE THEORY OF CLUMPS the coefficient for each pair of objects on the basis of the observed number of common properties, and ... than agreement in an infrequently-occurring one If N1 is the number of occurrences of P1, N2 the number of occurrences of P2, N3 of P3 and so on, and we have O1 and O2 in our example, possessing ... B.” A partition of the matrix marking off a clump will correspond to a local minimum of C Let A be the resemblance matrix We set up a vector v defining a partition of the total set of objects, with...

Ngày tải lên: 19/02/2014, 19:20

... falling of the performance in CCRT of the lower class, though the change was not significant The An Open Authoring Tool for the Games Our game platform has attracted the attention of teachers of several ... to teach with character combinations of different challenging levels During the process of playing, our system randomly selects one character from the list of 10 characters In a game, 10 characters ... and the end of February 2011 The lunar new year of 2011 happened to be within this period Students were divided into an experimental group and a control group We taught students of the experimental...

Ngày tải lên: 19/02/2014, 19:20

... F S T representation of the parses of sentences from a range of corpora (ATIS, IBM-Manual and Alvey) The results of these experiments provide a measure of repetitiveness of patterns as described ... repeated any number of times, or possibly omitted altogether, to get parses of sentences that differ from the sentences of the training corpus only in the number of modifiers This type of generalization ... parse(s) which is then instantiated with the features of the sentence This method of retrieving a generalized parse allows for parsing of sentences of the same lengths and the same POS sequence as...

Ngày tải lên: 20/02/2014, 22:20