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3892. Chaos synchronization of TSUCS unified chaotic system, a modified function projective control method
- Creator:
- Tirandaz, Hamed
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- chaos synchronization, three-scroll unified chaotic system (TSUCS), modified function projective synchronization (MFPS), and nonlinear dynamics
- Language:
- English
- Description:
- The synchronization problem of the three-scroll unified chaotic system (TSUCS) is studied in this paper. A modified function projective synchronization (MFPS) method is developed to achieve this goal. Furthermore, the only parameter of the TSUCS unified chaotic system is considered unknown and estimated with an appropriate parameter estimation law. MFPS method is investigated for both identical and non-identical chaotic systems. Lyapunov stability theorem is utilized to verify the proposed feedback control laws and validate the proposed synchronization scheme. Finally, some numerical simulations are presented to assess the effectiveness of the theoretical discussions.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3893. Chaotic behavior and modified function projective synchronization of a simple system with one stable equilibrium
- Creator:
- Wei, Zhouchao and Wang, Zhen
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- chaotic attractors, stable equilibrium, Shilnikov theorem, Lyapunov exponent, and synchronization
- Language:
- English
- Description:
- By introducing a feedback control to a proposed Sprott E system, an extremely complex chaotic attractor with only one stable equilibrium is derived. The system evolves into periodic and chaotic behaviors by detailed numerical as well as theoretical analysis. Analysis results show that chaos also can be generated via a period-doubling bifurcation when the system has one and only one stable equilibrium. Based on Lyapunov stability theory, the adaptive control law and the parameter update law are derived to achieve modified function projective synchronized between the extended Sprott E system and original Sprott E system. Numerical simulations are presented to demonstrate the effectiveness of the proposed adaptive controllers.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3894. Chaotic behaviour of continuous dynamical system generated by Euler equation branching and its application in macroeconomic equilibrium model
- Creator:
- Volná, Barbora
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Euler equation branching, chaos, IS-LM model, and QY-ML model
- Language:
- English
- Description:
- We focus on the special type of the continuous dynamical system which is genWe focus on the special type of the continuous dynamical system which is generated by Euler equation branching. Euler equation branching is a type of differential inclusion ˙x ∈ {f(x), g(x)}, where f, g : X ⊂ ℝ n → ℝ n are continuous and f(x) ≠ g(x) at every point x ∈ X. It seems this chaotic behaviour is typical for such dynamical system. In the second part we show an application in a new formulated overall macroeconomic equilibrium model. This new model is based on the fundamental macroeconomic aggregate equilibrium model called the IS-LM model.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3895. Chaotic behaviour of resonant motion in the solar system
- Creator:
- Froeschle, C.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- solar system, chaotic behaviour, and resonant motion
- Language:
- Czech
- Description:
- Chaotic behaviour in the solar system is very often connected with resonance. Great progresses have been made in the last few years to relate the existence of the Kirkwood gaps with chaos. Uses of mappings have allowed cheap computations over millions of years. Unexpected intermittent increase of orbital eccentricities due to the existence of thin chaotic zone provides a mechanism for planetary close approach. However semi-analytical developments show that at least for the 2/1 resonance the problem remains open. Chaotic rotations of satellites like Hyperion or Miranda and chaotic motion of comets in nearly parabolic orbits are predicted and some physical implications discussed. Both comet Halley and Hyperion appear to be good candidates for real examples of dynamical chaos in the solar system.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3896. Chaotic motion in secular resonances
- Creator:
- Froeschle, Ch. and Scholl, H.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- chaotic motion and mean motion resonances
- Language:
- Czech
- Description:
- We investigate the possible occurence of chaotic motion at the secular resonances v5, v6 and v16 integrating model asteroids and known asteroids over some Myrs. At the resonances v6 and v16 we findt ransitions between libration, inner and outer circulation. Such transitions are in the case of mean motions resonances related to chaotic motion. Chaotic motion is also indicated by a temporary location in both resonances, v6 and v16, as well as in the resonances v5 and v16. Chaotic motion is also indicated by close approaches to Jupiter like in the case of the v6 resonant asteroid (2368) Beltovata. The calculation of corresponding maximum Lyapunov exponents would confirm our conjecture concerning the occurence of chaotic motion at secular resonances.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3897. Characterisation of conditional independence structures for polymatroids using vanishing sets
- Creator:
- Chan, Terence, Chen, Qi, and Yeung, Raymond
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- full conditional independence, markov random field, and polymatroids
- Language:
- English
- Description:
- In this paper, we characterise and classify a list of full conditional independences via the structure of the induced set of vanishing atoms. Construction of Markov random subfield and minimal characterisation of polymatroids satisfying a MRF will also be given.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3898. Characteristics of chlorophyll fluorescence and membrane-lipid peroxidation during senescence of flag leaf in different cultivars of rice
- Creator:
- Jiao, Demao, Ji, Benhua, and Li, Xia
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- active oxygen, catalase, malonyldialdehyde, Oryza, peroxidase, photoinhibition, photooxidation, photosystem 2, premature ageing, superoxide dismutase, and xanthophyll cycle
- Language:
- Multiple languages
- Description:
- With japonica rice 98-08, indica hybrids Shanyou 63, Gangyou 881, and X07S/Zihui 100, and sub-species hybrid Peiai 64S/9311 as materials, chlorophyll (Chl) content, Chl a fluorescence parameters, and membrane lipid peroxidation in flag leaf were measured at late developmental stages under natural conditions. Fv/Fm, qP, ΦPS2, and electron transport rate gradually decreased while qN increased conversely. Excessive photon energy led to the accumulation of active oxygen (O2-), H2O, malonyldialdehyde, and products of membrane lipid peroxidation, and resulted in reduced Chl content and early ageing subsequent to the photooxidation during flag leaf senescence. There was obvious diversification of these parameters among rice cultivars. In comparison with japonica cv. 98-08 (tolerant to photooxidation), Fv/Fm decreased in indica cv. Shanyou 63 (susceptible to photooxidation) with greater accumulation of active oxygen and a sharp drop in Chl content, which resulted in "yellowish" early ageing, and affected the filling and setting of rice grains. The mechanism for premature ageing in indica rice was related to irradiance and temperature at filling stages. On a sunny day at above 25 °C, the reaction centre of photosystem 2 (PS2) exhibited a dynamic change on reversible inactivation. Under the intense irradiance at noon, PS2 function in indica rice exhibited obvious down-regulation and photoinhibition. Under intense irradiance with lowered temperatures, PS2 resulted in photo-damage and early ageing, related to the degradation of PS2-D1 protein and the inhibition of endogenous protection systems such as the xanthophyll cycle and enzymes scavenging active oxygen. Hence for high-yield breeding, based on a good plant-type and utilising heterosis and tolerance of photooxidation, the selection of japonica rice or a sterile line with the japonica genotype as female is a strategy worthy of consideration. and Demao Jiao, Benhua Ji, Xia Li.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
3899. Characteristics of photosynthetic apparatus in Mn-starved maize leaves
- Creator:
- Jiang, C.-D., Gao, H.-Y., and Zou, Q.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- chlorophyll fluorescence, net photosynthetic rate, photoinhibition, violaxanthin, violaxanthin de-epoxidase, xanthophyll cycle, Zea, and zeaxanthin
- Language:
- Multiple languages
- Description:
- The effects of Mn-deficiency on CO2 assimilation and excitation energy distribution were studied using Mn-starved maize leaves. Mn-deficiency caused about 70 % loss in the photon-saturated net photosynthetic rate (PN) compared to control leaves. The loss of PN was associated with a strong decrease in the activity of oxygen evolution complex (OEC) and the linear electron transport driven by photosystem 2 (PS2) in Mn-deficienct leaves. The photochemical quenching of PS2 (qP) and the maximum efficiency of PS2 photochemistry (Fv/Fm) decreased significantly in Mn-starved leaves under high irradiance, implicating that serious photoinhibition took place. However, the 'high-energy' fluorescence quenching (qE) decreased, which was associated with xanthophyll cycle. The results showed that the pool of de-epoxidation components of the xanthophyll cycle was lowered markedly owing to Mn deficiency. Linear electron transport driven by PS2 de-creased significantly and was approximately 70 % lower in Mn-deficient leaves than that in control, indicating less trans-thylakoid pH gradient was built in Mn deficient leaves. We suggest that the decrease of non-radiative dissipation depending on xanthophyll cycle in Mn-starved leaves is a result of the deficiency of trans-thylakoid pH gradient. and C. D. Jiang, H. Y. Gao, Q. Zou.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
3900. Characteristics of sun- and shade-adapted populations of an endangered plant Primulina tabacum Hance
- Creator:
- Liang, K. M., Lin, Z. F., Ren, H., Liu, N., Zhang, Q. M., Wang, J., Wang, Z. F., and Guan, L. L.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- botanika, botany, cave microenvironment, chloroplast ultrastructure, ecophysiological trait, light adaptation, morphological structure, and Primulina tabacum Hance
- Language:
- Multiple languages
- Description:
- Primulina tabacum Hance is an endangered perennial herb distributed in calcium-rich and nitrogen-limited soil of the karst limestone areas in southern China. The morphological, ultrastructural, and physiological traits were determined for P. tabacum populations growing in three different environment conditions: twilight zone of a cave (site TZ, extremely low light intensity), at a cave entrance (site EZ, low light intensity), and in an open area (site OA, high light intensity). At site OA, P. tabacum plants were exposed to high light (635 μmol m-2 s-1 of mean daily photosynthetically active radiation) with drought stress, and expressed traits to minimize light capture and water loss. Compared to plants at sites EZ and TZ, those at site OA had thicker leaves with higher densities of stomata and pubescence, higher palisade/spongy ratio, higher light-saturated rate of net photosynthetic rate (Pmax), higher biomass, higher non-photochemical quenching coefficient (NPQ), and higher light saturation point (LSP) but fewer grana per chloroplast and less thylakoid stacking per granum. In contrast, P. tabacum growing at the cave vicinities: EZ (mean daily irradiance 59 μmol m-2 s-1) and TZ (mean daily irradiance 11 μmol m-2 s-1) showed typical shade-adapted characteristics for optimum light capture. The presence of sun- and shade-adapted characteristics indicates that P. tabacum has different strategies to cope with different environments but whether these strategies reflect genetic selection or phenological plasticity is yet to be determined. Such variability in physiological and morphological traits is important for the survival of P. tabacum in heterogeneous light conditions. and K. M. Liang ... [et al.].
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public