3—methods for material evaluation
Báo cáo hóa học: " Comparison of four different methods for reliability evaluation of ecotoxicity data: a case study of non-standard test data used in environmental risk assessments of pharmaceutical substances" pdf
Ngày tải lên :
21/06/2014, 03:20
... Table Modified evaluation criteria/questions concerning endpoints and a summary of the evaluation results Evaluation method Evaluation criteria/question Type of criteria/mark Summary of evaluation ... modified evaluation criteria/questions concerning test substance, and summary of the evaluation results Evaluation method Evaluation criteria/question Type of criteria/mark Summary of evaluation ... modified evaluation criteria/questions concerning test environment, and summary of the evaluation results Evaluation method Evaluation criteria/question Type of criteria/mark Summary of evaluation...
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Ultrasonic Methods for Material and Structure Inspection pdf
Ngày tải lên :
29/06/2014, 10:20
... mechanisms for the two materials can be completely different A good understanding of different failure mechanisms for various materials is needed for designing efficient SHM systems for different ... indicator for a material s ability to withstand overloads under brittle conditions or plane strain loading conditions In order to obtain K1c, the fracture toughness for the material is estimated for ... assessed recently as an additional parameter to evaluate material fracture resistance For thin sheet materials, such as the material gage used for aircraft fuselage, R-curves (crack resistance behavior)...
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Exploration on in situ diagnosis methods for the evaluation of mechanical and magnetic performance of hard disk drives
Ngày tải lên :
05/10/2015, 22:15
... Introduction The modern information technology consists of three parts: information acquiring, information processing, information transferring and information storage In fact, information storage technology ... methodology for disk drive level analysis of flying height variation Based on the relationship between readback signal and flying height, the formula for harmonic intensity amplitude is derived for different ... wave recording waveform and harmonics 38 Fig 3.3 1st to 5th harmonics waveform of fixed transition interval method 40 Fig.3.4 “111100” readback waveform and superposed waveform by harmonics...
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Managerial economics strategy by m perloff and brander chapter 3 methods for demand analysis
Ngày tải lên :
10/08/2017, 12:28
... The forecast value for the first quarter of 2014 is 2094 + (27.97 × 37) + (93.8 × 1) – (125.3 × 0) – (8.60 × 0) = $3.223 billion 3-28 © 2014 Pearson Education, Inc All rights reserved 3.5 Forecasting ... econometric forecasting methods incorporate both extrapolation and estimation of causal or explanatory economic relationships – We use these estimates to make conditional forecasts, where our forecast ... elasticities before making any real price change The tool needed is regression analysis • Calculation of Arc Elasticity – – To calculate an arc elasticity, managers use data from before the price...
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Tài liệu Báo cáo khoa học: "Methods for the Qualitative Evaluation of Lexical Association Measures" doc
Ngày tải lên :
20/02/2014, 18:20
... best measure for identifying AdjN collocations, except for coordinates between 15% and 20% where t-test outperforms log-likelihood For PNV data, the curves of all measures (except for frequency) ... beginning of this section, the performance of and relative to the other AMs is not better for high-frequency data than for low-frequency data Instead, the poor performance observed in section 4.2 ... Ă Ư Ơ Mutual Information Frequency Đ Đ Ă Log-Likelihood t-Test Ư Ă Â Ơ General statistics for the AdjN and PNV base sets are given in Table Manual annotation was performed for AdjN pairs...
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Báo cáo khoa học: Modified PCR methods for 3¢ end amplification from serial analysis of gene expression (SAGE) tags doc
Ngày tải lên :
07/03/2014, 00:20
... FEBS W.-J Xu et al Methods for 3¢ end amplification from SAGE tags A B Fig Schematic for GLGI (A) In this process, first-strand cDNA synthesized by oligo(dT) is used for PCR In the first cycle, ... only for the subsequent PCR but also for 5¢-RACE, 3¢-RACE and northern blotting, etc Finally, the two-step nested PCR principle can easily produce 3¢-end cDNA tag-specific frag- Methods for 3¢ ... keep them at room temperature for 15 Centrifuge at 4000 g for 35 at °C, then remove the supernatants Add 150 lL of 70% ethanol per well, and centrifuge again at 4000 g for 15 to wash the DNA pellets...
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Báo cáo khoa học: "Theoretical Evaluation of Estimation Methods for Data-Oriented Parsing" pot
Ngày tải lên :
17/03/2014, 22:20
... behavior for any weight-distribution possible in the STSG model (Prescher et al., 2003) give a more formal treatment of bias and consistency in the context of DOP (7) f P6 i for i = for i = ... that is, we like an estimator to be consistent The STSG formalism, however, allows for many different derivations of the same parse tree, and for many different grammars to generate the same frequency-distribution ... weight-distribution test for the whole class of STSGs, we argued earlier that this test is not the appropriate test either Both estimation methods for STSGs and the criteria for evaluating them,...
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Báo cáo hóa học: " Evaluation of normalization methods for two-channel microRNA microarrays" ppt
Ngày tải lên :
18/06/2014, 16:20
... intensities for that chip (e.g denoted by the distribution function F ) is transformed to equal the reference intensity distribution Operationally, this transformation is accomplished by determining for ... invariant sets (e.g., 10%), performing some type of normalization generally produced higher ICCs than performing no normalization The ICCs for different normalization methods for the experiment involving ... with invariant set also performed well for the renal cancer cell lines, but average observed ICCs were slightly higher for global median and mean methods The good performance of quantile normalization...
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báo cáo hóa học: " Evaluation of methods for extraction of the volitional EMG in dynamic hybrid muscle activation" pot
Ngày tải lên :
19/06/2014, 10:20
... overall dynamic EMG signal, the volitional EMG envelope, to serve as a basic signal for control and force evaluation For this purpose, a "synthetic" database was created from in-vivo experiments to ... methods were used for evaluation of the success of extraction of the volitional EMG The basic one was by visual inspection of the approximated signal which, despite not providing information on the ... method in our work provides rational evaluators for the performance of the various schemas These, however, are not the only possible evaluators For instance, Sennels et al [16] used other evaluators...
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Quantitative Methods for Business chapter 3 ppt
Ngày tải lên :
06/07/2014, 00:20
... The nature of the slope therefore depends on where we are along the horizontal scale, in other words, the value of x For the lower values of x the slope is positive, for the higher ones it is negative ... the bend 93 Before we look at the model in detail it is worth reflecting on the reasons companies keep stocks or inventories Most companies keep some stock of the materials they need for their operations; ... delivered right away, there is no time lag for delivery This latter assumption means that the company can wait until their stock runs out before placing an order for its replenishment Taking these assumptions...
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Quantitative Methods for Ecology and Evolutionary Biology (Cambridge, 2006) - Chapter 3 doc
Ngày tải lên :
06/07/2014, 13:20
... of them can be greater than 1, and they must sum to For example, for the fair die, Z would represent the outcome of throw; we then set zk ¼ k for k ¼ to and pk ¼ 1/6 Exercise 3.1 (E) What are the ... for discrete random variables too, but the distribution function has jumps in it Exercise 3.2 (E) What is the distribution function for the sum of two rolls of the fair die? We can also ask for ... Virtually all computer operating systems now provide random numbers that are uniformly distributed between and 1; for a uniform random number between and 1, the probability density is f(z) ¼ if z and...
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Advanced Mathematical Methods for Scientists and Engineers Episode 1 Part 3 pptx
Ngày tải lên :
06/08/2014, 01:21
... 3.2.1 sin x x has a removable discontinuity at x = The Heaviside function, 0 for x < 0, H(x) = 1/2 for x = 0, for x > 0, has a jump discontinuity at x = x has an infinite discontinuity at ... Uniform Continuity Consider a function f (x) that is continuous on an interval This means that for any point ξ in the interval and any positive there exists a δ > such that |f (x) − f (ξ)| < for ... 3.4: Piecewise Continuous Functions the function is said to be uniformly continuous on the interval A sufficient condition for uniform continuity is that the function is continuous on a closed interval...
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Advanced Mathematical Methods for Scientists and Engineers Episode 2 Part 3 ppt
Ngày tải lên :
06/08/2014, 01:21
... [ıθ]2π for n = −1 = for n = −1 ı2π for n = −1 for n = −1 We parameterize the contour and the integration z − z0 = ı2 + eıθ , 2π n ı2 + eıθ (z − z0 ) dz = C = (ı2+eıθ )n+1 n ı eıθ dθ 2π for ... z 1/2 , − log z + const Assuming that the above expression is non-singular, we have found a formula for writing the analytic function in terms of its real part, u(r, θ) With the same method, we ... cos t, y = sin t for ≤ t ≤ π π x2 dx + (x + y) dy = C cos2 t(− sin t) + (cos t + sin t) cos t dt π = − 10.2 Contour Integrals Limit Sum Definition We develop a limit sum definition for contour integrals...
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Advanced Mathematical Methods for Scientists and Engineers Episode 3 Part 1 potx
Ngày tải lên :
06/08/2014, 01:21
... (x), for x ≥ 0, for x ≤ The initial condition for y− demands that the solution be continuous Solving the two problems for positive and negative x, we obtain y(x) = e1−x , e1+x , for x > 0, for ... −1 sign x = for x < for x = for x > Since sign x is piecewise defined, we solve the two problems, y+ + y+ = 0, y− − y− = 0, y+ (1) = 1, y− (0) = y+ (0), for x > for x < 0, and define the ... xn F 1, y x (Just formally substitute 1/x for λ.) For example, x2 y + 2y , x+y xy , x cos(y/x) are homogeneous functions of orders 3, and 1, respectively Euler’s theorem for a homogeneous function...
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Advanced Mathematical Methods for Scientists and Engineers Episode 3 Part 2 potx
Ngày tải lên :
06/08/2014, 01:21
... ln t + ct , A = −2 For positive A, the solution is bounded at the origin only for c = For A = 0, there are no bounded solutions For negative A, the solution is bounded there for any value of c ... α→∞ α − 1 for x = 0, = for x > lim y(x) = lim α→∞ This behavior is shown in Figure 14.10 The first graph plots the solutions for α = 1/128, 1/64, , The second graph plots the solutions for α = ... lim x→∞ c + βx β =0 = lim αx x→∞ α eαx e For β = λ = 1, the solution is y= e−x +c e−αx (c + x) e−x α−1 828 for α = 1, for α = 1 Figure 14.9: The Solution for a Range of α The solution which satisfies...
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Advanced Mathematical Methods for Scientists and Engineers Episode 3 Part 3 pptx
Ngày tải lên :
06/08/2014, 01:21
... ··· 856 0 0 λ 1 λ 0 Jordan Canonical Form A matrix J is in Jordan canonical form if all the elements are zero except for Jordan blocks Jk along the diagonal J1 · · · 0 ... method for computing functions of matrices Example 15.3.3 Consider the matrix exponential function A= −3 eA for our old friend: 1 −1 In Example 15.3.2 we showed that the Jordan canonical form ... the information in part (i), write down one solution x(1) (t) of the system (15.2) There is no other solution of a purely exponential form x = xi eλt (c) To find a second solution use the form...
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Advanced Mathematical Methods for Scientists and Engineers Episode 3 Part 4 pot
Ngày tải lên :
06/08/2014, 01:21
... greater than one, we will have solutions of the form, xitα , xitα log t + ηtα , xitα (log t)2 + ηtα log t + ζtα , ., analogous to the form of the solutions for a constant coefficient system, xi eατ , ... 1 We have an uncoupled equation for x1 x1 = x1 t x1 = c1 t 898 x1 x2 (15.5) By substituting the solution for x1 into (15.5), we obtain an uncoupled equation for x2 (c1 t + x2 ) t x2 − x2 = ... = is a necessary and sufficient condition for this equation to be exact Hint, Solution Exercise 16.2 Determine an equation for the integrating factor µ(x) for Equation 16.1 900 (16.1) Hint, Solution...
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Advanced Mathematical Methods for Scientists and Engineers Episode 3 Part 5 pdf
Ngày tải lên :
06/08/2014, 01:21
... order equation for y, but note that it is a first order equation for y We can solve directly for y d dx 3/2 x y =0 y = c1 exp − x3/2 exp Now we just integrate to get the solution for y y = c1 ... equations have the form d F (x, y, y , y , ) = f (x) dx If you can write an equation in the form of an exact equation, you can integrate to reduce the order by one, (or solve the equation for first order) ... +ay = 0, has the solution y = cxa Thus for the second order equation we will try a solution of the form y = xλ The substitution 940 y = xλ will transform the differential equation into an algebraic...
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Advanced Mathematical Methods for Scientists and Engineers Episode 3 Part 6 ppsx
Ngày tải lên :
06/08/2014, 01:21
... put in a simpler form by exchanging the dependent and independent variables Thus a differential equation for y(x) can be written as an equation for x(y) Solving the equation for x(y) will give ... a x da = ln x a=0 xa − x−a a Clearly y1 is a solution for all a For a = 0, y2 is a linear combination of xa and x−a and is thus a solution For a = 0, y2 is one half the derivative of xa evaluated ... linear equation for u which when solved will give us an implicit solution for y (See Exercise 18.4.) 984 Result 18.1.1 The Bernoulli equation y + p(t)y = q(t)y α , α = can be transformed to the...
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