A cloud model controller for ship steering is developed with nonlinear behavior and uncertain problems of ship motion. The fast Elitist non-dominating sorting genetic algorithm II (NSGA-II) is ...employed to optimize the parameters of the controller. Analysis and simulation results show the design of the cloud model controller based on multi-objective optimization of genetic algorithm is effective and the controller has good control performance and strong robustness.
Lion's nonoverlapping Schwarz domain decomposition method based on a finite difference discretization is applied to problems with fronts or layers. For the purpose of getting accurate approximation ...of the solution by solving small linear systems, grid refinement is made on subdomains that contain fronts and layers and uniform coarse grids are applied on subdomains in which the solution changes slowly and smoothly. In order to balance loads among different processors, we employ small subdomains with fine grids for rapidly-changing-solution areas, and big subdomains with coarse grids for slowly-changing-solution areas. Numerical implementations in the SPMD mode on an nCUBE2 machine are conducted to show the efficiency and accuracy of the method.
The Comparison of Stock Contract and Options Contract Caiyu Zhang; Benshan Shi; Daoqi Hou ...
2010 Third International Conference on Business Intelligence and Financial Engineering,
2010-Aug.
Conference Proceeding
This paper compared stock contract and option contract on the basis of principal-agent theory, and discussed the advantages of the two. Despite of the common view that stock contract is a particular ...option contract without exercise price, we considered two circumstances of stock contract: free given and partial purchase. And stock purchase price is used in our analysis. The calculation results showed that: when the cash part of managers' income is of free variation, stock contract is better than option contract; when the cash part is fixed, superiority of stock option is based on its purchase price. Unit costs of stock contract and option contract are almost the same if stock purchase price equals option exercise price, and the two contracts can be replaced with each other. Besides, when purchase price and exercise price is near stock market price, unit incentive cost of stock contract and option contract is the lowest, which means that the two contracts.
We propose iterative nonoverlapping domain decomposition algorithms for second order partial differential equations. For the first algorithm, at the interface of two subdomains, one subdomain problem ...requires that Dirichlet data be passed to it from the previous iteration level, while the other subdomain problem requires that Neumann data be passed to it. The second algorithm can be characterized as follows: the transmission conditions at the interfaces of subdomains are taken to be Dirichlet at odd iterations and Neumann at even iterations. These two algorithms lead to full parallelizable subdomain problems. The convergence of the iterative sequence of subdomain solutions is established for these two algorithms. Finite-dimensional discretization schemes, such as the finite element approximation, the finite element approximation with Lagrange multipliers, and the hybrid mixed finite element approximation, are considered and analyzed. Applications to parabolic and hyperbolic problems are indicated. Numerical examples are provided to confirm the fast convergence of the iterative procedures.
In this study we analyze a nonoverlapping domain decomposition method for the solution of elliptic Partial Differential Equation (PDE) problems. This domain decomposition method involves the solution ...of Dirichlet and Neumann PDE problems on each subdomain, coupled with smoothing operations on the interfaces of the subdomains. The convergence analysis of the method at the differential equation level is presented. The numerical results confirm the theoretical ones and exhibit the computational efficiency of the method.
Amplitude-squared squeezed states are nonclassical states of light with reduced quantum noise in one quadrature of the square amplitude at the expense of enlarged fluctuation in another quadrature. ...Focusing on the investigation on these amplitude-squared squeezed states, this dissertation contains four different parts. The first and last parts are concentrated on the minimum uncertainty amplitude-squared squeezed states and their quantum statistical properties. In the first part, a particularly simple subset of the states are found and investigated. These states are constructed by applying a squeeze operator to a state that consists of a Hermite polynomial, whose argument is the mode creation operator multiplied by a constant, acting on the vacuum. Investigations reveal that these states may or may not be squeezed in the normal sense, and may or may not have sub-Poissonian photon statistics. In the second part, it is shown that large amount of amplitude-squared squeezing can be obtained outside the cavity while the maximum reduction of the noise of the square of the field amplitude inside the cavity is only by 50%. In the third part, the phase-insensitive amplification of amplitude-squared squeezing as well as two other higher-order squeezing, fourth-order squeezing and intrinsic fourth-order squeezing, is examined. It is found that for any input state, both fourth-order squeezing and intrinsic fourth-order squeezing disappear at the output if the intensity gain is greater than 2. Amplitude-squared squeezing, on the other hand, can survive amplification at gains slightly greater than 2. Therefore, the photon-cloning limit (intensity gain equal 2) is not a fundamental limit to nonclassical behavior. In the last part, general solutions to the eigenvalue equation for amplitude-squared squeezed minimum uncertainty states have been found and investigated. The average photon number, quasi-probability Q-function, and photocount distribution of these states have been derived and explored. It is shown that symmetry of Q-function of any quantum state is related to the suppression of certain terms of its photocount probability. Finally, oscillation of the photocount probability in highly amplitude-squared squeezed minimum uncertainty states has been found and interpreted in terms of "interference in phase space".
Optimization and characterization of wheat bran modified by in situ enhanced CO2 blasting extrusion Long, Daoqi; Fayin YeauthorCollege of Food Science, Southwest University, Chongqing 400715, People's Republic of China; Guohua ZhaoauthorCollege of Food Science, Southwest University, Chongqing 400715, People's Republic of ChinaKey Laboratory of Food Processing and Technology of Chongqing, Chongqing 400715, People's Republic of China
2015
Journal Article
In this study, it is proved that the isothermal surface is not identical with the isobaric surface in a static model of a contact binary system based on hydrostatic and thermal equilibrium equations. ...Therefore, there is a baroclinic structure in a contact binary atmosphere, and the development of circumfluence is thus inevitable. It is suggested that a static model should not be adopted in modeling a contact binary atmosphere. The asymmetry (different brightness between the maxima) commonly found among the light curves of W UMa binary systems can be explained in terms of the asymmetry of circumfluence in the contact binary stars due to the Coriolis effect. 8 refs.
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