lotka volterra models with delays

... 4.2.1 Impulsive n-dimensional Lotka Volterra Models 4.2.2 Impulsive Lotka Volterra Models with Dispersions 4.2.3 Impulsive Lotka Volterra Models with Delays 4.3 Neural Networks ... Chap 4, the applications of the theory of almost periodicity to impulsive biological models, Lotka Volterra models, and neural networks are presented The impulses are considered either as means ... populations “momentary”, then the population numbers vary by jumps In this case we will study Lotka Volterra models with impulsive perturbations of the type ⎧ t ⎪ ⎪ ˙ H(t) = H(t) r1 − a ⎪ k(t − u)H(u)du...

Ngày tải lên: 29/10/2015, 12:30

... solution space are concerned, the dynamics is generally not closed within the category of almost periodicity but is closed within that of almost automorphy It turns out that almost automorphic ... that xα → x Since X laminates into minimal sets ([14]), without loss of generality, we assume that there is a net {γα : α ∈ Λ} in E(X) with γα x = xα and {γα } converges, say to γ0 in E(X) Thus ... to show that p−1 (px) = {x} Let y = p(x) ∈ Y0 and fix a x0 with y0 ≡ px0 and p−1 (y0 ) = {x0 } (Theorem 2.14) If {tn } is any sequence with y0 · tn → y, then x0 · tn → x It follows that p−1 (y)...

Ngày tải lên: 29/10/2015, 12:32

... linear Volterra integro-differential equations,” Mathematical Models & Methods in Applied Sciences, vol 18, no 1, pp 21–45, 2008 L Pandolfi, “Riesz systems and controllability of heat equations with ... Applying part b of Corollary 2.3, we know that the corresponding Volterra equation is asymptotically almost periodic Example 3.2 Consider the Volterra equation ∂u t, x ∂t ∂2 u t, x ∂x2 α t e−β t−s ∂2 ... e−2t is exponentially stable b Each solution with initial value x ∈ D A , x / is not strongly stable and hence not exponentially stable c Each solution with x ∈ D A is asymptotically almost periodic...

Ngày tải lên: 21/06/2014, 05:20

... generally coincide with physical locations of links To overcome this problem in most cases, one more parameter was introduced into the model; a translation along the z-axis With this addition, ... beam• To demonstrate the functional relations (Fig 2), a beam is taken with a frame at its free end The frame's z-axis coincides with the principal beam axis and is oriented away from the fixed beam ... identified This is important because, for most robots, link elasticity is an error with only a small effect and thus, with respect to the numerical algorithms used for identification, only needs to...

Ngày tải lên: 16/12/2012, 15:23

Ngày tải lên: 13/09/2013, 02:10

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Ngày tải lên: 18/02/2014, 07:20

... Thioesters can be obtained by fusing the protein of interest with the N-terminus of an intein, proteins with N-terminal Cys by fusing with the C-terminus of a mutated intein [64] Both fragments ... can be removed by the treatment with Zn and H+ to form a native peptide bond NCL combined with desulfurization In this application, NCL is extended to proteins without Cys-residues [105] Ala is ... cleavage of the fully protected peptide chain with acetic acid and trifluoroethanol The thioester can be obtained by the treatment of the protected peptide with activating reagents and thiols [36,37]...

Ngày tải lên: 07/03/2014, 15:20

... treatment in a stand of ponderosa-pine overstory with a dense ponderosapine understory and/or Douglas-fir encroachment The concepts are applicable (with or without adaptation) to other stand configurations ... the base of the leave trees with minimal damage and pile the burnable biomass a safe distance away The hot saw can handle larger material with no problem If equipped with a boom, the machine does ... also comes with a large thumb for piling vegetation The Shar 20 by Shur Shar Manufacturing (Figure 6) is a specialized machine with a vertical-shaft, fixed-tooth disk, also available with free-swinging...

Ngày tải lên: 08/03/2014, 13:20

... trying to deal with anything as important as popular music is just as absurd However, The Times and NME are not alone in questioning the ability of traditional scholarship to deal with popular ... music with regular pulse (Bradley 1980); (8) the general acceptance of certain Euro- and Afro-American genres as constituting a lingua franca of musical expression in a large number of contexts within ... and how it interacts with their respective cultural, social and natural environments In other words, reverting to the question why and how does who say what to whom and with what effect?, we...

Ngày tải lên: 15/03/2014, 12:40

... number of predicted coenzyme binding proteins within a genome increases with its size (Fig 1) The number of Rossmann folds has a steep increase for genomes with up to 10 000 open reading frames (ORFs), ... is in contact with ATP, in PurT it is the substrate (glycinamide ribonucleotide) which is in contact with the corresponding region FtsZ is a GTPase and its coenzyme is in contact with the region ... The redundancy among eukaryotes increases with genome size and is 30–40% for genome sizes around 30 000 ORFs There are some outliers, e.g Apis mellifera, with a very high redundancy level of 54%...

Ngày tải lên: 23/03/2014, 10:21

... considered) are small [9] w represents the complex white Gaussian noise, with the characteristics zero mean: E[w] Å (4.2.8) uncorrelated, with variance 2s : Rw Å 2s IN1N , (4.2.9) where E[r] means expected ... (5.2.7) with a0 Å 1, a1 Å 01.43596, a2 Å 0.497536, a3 Å 00.061576 Kaiser window [17, p 232] hi Å Eq (5.2.7) is simply the DTFT of the weighted samples, zi hi , and it will be used, jointly with ... , and one can see that for SNR below 10 dB the FTE with the Standard window offers less bias than the TFBMPM Nevertheless, the rmse obtained with the TFBMPM is less than the one computed using...

Ngày tải lên: 26/03/2014, 00:29

... amplified DNA by target is made to hybridize with presynthesized sequences on solid supports Hybridized arrays are readwith CCD cameras and reports are generated with computer-aided technology The first ... interfere with the hybridization processthe corresponding structures in DNA are less stable The problem with RNA can be partly relieved by degrading the transcripts to fragments of a size comparable with ... the molecular population applied the chip, e.g., on when one is dealing with single-copy genes orwith mRNAs of low abundance With this in mind, we are developing methods for on-chip amplification...

Ngày tải lên: 11/04/2014, 09:40

... value each scanner produces and the LAB number for a color Without the profile, we would be presented with a set of different RGB numbers with no way of knowing what color they are supposed to represent ... a device with a small color gamut In such instances, we have to deal with colors that are out-of-gamut of the destination process Color management provides a number of ways to deal with out-of-gamut ... postdoctoral fellow with the Artificial Intelligence and Information Analysis Laboratory, Aristotle University of Thessaloniki, Greece Since May 2003, he has been a postdoctoral fellow with the Edward...

Ngày tải lên: 05/06/2014, 11:43

... experiment in Figures and Output size Bicubic interpolation Farsiu [8] + [21](without MV) Farsiu [8] + [17](without MV) Proposed (with MV) 320 × 240 5(c), 19.44 dB 5(d), 19.33 dB 5(e), 18.84 dB 5(f), ... Thus, the HR frame at time t, X(t) with a size of [r2 MN × 1] is the warped version of the previous HR frame where r is the resolution-enhancement factor, since M(t) with a size of [r2MN × r2MN], ... This threshold value is determined experimentally with more than ten real video data containing scene changes If a sudden scene change is detected with this method, we reset the estimation process...

Ngày tải lên: 20/06/2014, 22:20

... Lotka- Volterra equations with the same parameters is depicted in Figure Advances in Difference Equations 11 y(t) 0 x(t) Figure 4: Numerical solutions of fractional-order q ≡ q1 q2 0.9 Lotka- Volterra ... model with different behavior for describing a more general NMR, which can find applications in complex materials exhibiting memory 3.3 Fractional-Order Lotka- Volterra System The fractional-order Lotka- Volterra ... solution of the fractional-order Lotka- Volterra equations, which could be compared with the numerical solution The only possibility is to compare proposed numerical method with an approximate solution...

Ngày tải lên: 21/06/2014, 05:20

... tested in realtime It was tested with a 2.66 GHz i7 Intel Mac with GB RAM at a sampling frequency of 48 kHz using an external audio interface MAudio Fast Track Pro with the ASIO buffer size 128 samples ... contains the common-cathode tube amplifier with a cathode capacitor and is used as the first block in Figure The other one contains the common-cathode tube amplifier without the cathode capacitor and is ... voltage The individual functions have very similar shapes with different capacitor voltages Therefore, splines are used for the approximation with constant capacitor voltages and different input voltage...

Ngày tải lên: 21/06/2014, 06:20

... red bar(s) together with a TF name on the first line of each figure represent the known binding site For a given TF, data shown in grey (named with TRANSFAC IDs) represent models corresponding ... TFBSs and random DNA sites Panels (c) and (d) are similar with (a) and (b), respectively, but with each information scores shifted 100 bps with Further, DNA duplex stabilities are expected to be ... score of 0.7555 which is obtained with nucleosome data alone increases to 0.7946 when combined with regulatory potential, and jumps to 0.8334 when combined with conservation In order to gain...

Ngày tải lên: 21/06/2014, 08:20

... Velocities with Fixed SNR The performances of different estimation methods are compared when the mobile station moves at different velocities with SNR = 10 dB, as shown in Figure The proposed method without ... predictor has the best performance with slow velocity because the channel variation is slow However, when the mobile moves with high velocity, the proposed method with a one-step channel predictor ... convolution MC-CDMA Communication System This section describes the models of the transmitter and receiver in an MC-CDMA system with Ns subchannels and Nu users The nth multicarrier block symbol...

Ngày tải lên: 21/06/2014, 08:20

... E∗ with F : V I C, A ∩T −1 / ∅ and Ay ≤ Ay−Au for all y ∈ C and u ∈ F Let {αn } ⊂ 0, , {rn } ⊂ 0, ∞ such that lim supn → ∞ αn < and lim infn → ∞ rn > 0, and let {λn } ⊂ a, b for some a, b with ... α-inverse-strongly-monotone operator of C into E∗ with V I C, A / ∅ Assume that Ay ≤ Ay − Au for all y ∈ C and u ∈ V I C, A Let {λn } ⊂ a, b for some a, b with < a < b < c2 α/2, where c is a constant ... ≥ε 2.2 E is uniformly convex if and only if δ ε > for all ε ∈ 0, Let p be a fixed real number with p ≥ Then E is said to be p-uniformly convex if there exists a constant c > such that δ ε ≥...

Ngày tải lên: 21/06/2014, 20:20