The embedding efficiency is one of the important indicators for the steganographic methods. This article presents a study of this indicator when embedding hidden information in text containers using the letter replace...
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The paper presents the results concerning computational burden analysis of dynamic programming and bottom-up algorithms when solving knapsack problems. It presents the efficiency of the algorithms information expresse...
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ISBN:
(纸本)9789897583049
The paper presents the results concerning computational burden analysis of dynamic programming and bottom-up algorithms when solving knapsack problems. It presents the efficiency of the algorithms information expressed both in calculation time, as well as mean number of iterations in knapsack problems up to 15,000 items and capacity of the knapsack equal to 10,000. The aim of the paper is to present the this knowledge what of practical use when solving optimization problems where estimate of execution time of the algorithm is important.
A two-input two-output current-mode universal biquad employing only two voltage differencing transconductance amplifiers (VDTAs) and two grounded capacitors is introduced. By appropriately connecting the input and out...
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ISBN:
(纸本)9781538666630
A two-input two-output current-mode universal biquad employing only two voltage differencing transconductance amplifiers (VDTAs) and two grounded capacitors is introduced. By appropriately connecting the input and output terminals, the proposed circuit can realize lowpass, bandpass, highpass, bandstop and allpass current responses. It also exhibits an independent electronic control of the natural angular frequency (omega(o)) and the quality factor (Q) by properly setting the transconductance values of the VDTAs. No critical component matching choices are imposed for generating all the filter functions, and all incremental parameter sensitivities are low.
This work proposes the design and improvement of the wireless cloud system services for controlling water temperature and monitoring the pH-value for the crayfish breeding system. The cooling system employs a set of p...
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ISBN:
(纸本)9781538666630
This work proposes the design and improvement of the wireless cloud system services for controlling water temperature and monitoring the pH-value for the crayfish breeding system. The cooling system employs a set of peltier, microcontroller board, and temperature and pH sensors. The circulate water system is used in order to maintain well-distributed water temperature in the water tank. The record data is displayed via the cloud computing processing system, which can be access the measured data at any time and everywhere by various PDA devices via internet network.
The realization of voltage-mode second-order multifunction filter using current follower cascaded transconductance amplifier (CFCTA) is presented in this contribution. The proposed circuit has three voltage input node...
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ISBN:
(纸本)9781538666630
The realization of voltage-mode second-order multifunction filter using current follower cascaded transconductance amplifier (CFCTA) is presented in this contribution. The proposed circuit has three voltage input nodes and a single voltage output node. Its natural frequency and quality factor are electronically adjusted. Also, the control of the quality factor is done without affecting the natural frequency. Five filtering functions, low-pass filter (LPF), high-pass filter (HPF), band-pass filter (BPF), band-reject filter (BRF) and all-pass filter (APF), are obtained with the same circuit topology. The selection of each filter response meets the requirement of no active and passive element matching conditions. The PSpice simulation results of all five filtering functions along are included to verify the theoretical analysis.
This paper presents an efficient statistical performance analysis method of hypersonic vehicle with parametric perturbation and external uncertainties. Based on Covariance Analysis Describing Equation Technique (CADET...
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A stability proof is presented for a nonlinear PD (NPD) controller and third order systems. Nonlinear-stiffness control has been described previously in the literature and experimentally demonstrated;but to date, no s...
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A stability proof is presented for a nonlinear PD (NPD) controller and third order systems. Nonlinear-stiffness control has been described previously in the literature and experimentally demonstrated;but to date, no stability proof has been given for systems of degree greater than 2 and the case where the stiff gain exceeds the limit established by the circle criterion. The limitation is important because, for this case, the circle is quite conservative and much of the benefit of NPD control comes with gains greater than could previously be proven to be stable. The stability of 3rd order systems with nonlinear-stiffness PD control and gains exceeding the circle-criterion limit is established by demonstrating a Lyapunov function. The damping achieved by high-gain NPD control is demonstrated by simulation.
The Point Pair Feature [4] has been one of the most successful 6D pose estimation method among model-based approaches as an efficient, integrated and compromise alternative to the traditional local and global pipeline...
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ISBN:
(纸本)9781538663387
The Point Pair Feature [4] has been one of the most successful 6D pose estimation method among model-based approaches as an efficient, integrated and compromise alternative to the traditional local and global pipelines. During the last years, several variations of the algorithm have been proposed. Among these extensions, the solution introduced by Hinterstoisser et al. [6] is a major contribution. This work presents a variation of this PPF method applied to the SIXD Challenge datasets presented at the 3rdinternational Workshop on Recovering 6D Object Pose held at the ICCV 2017. We report an average recall of 0.77 for all datasets and overall recall of 0.82, 0.67, 0.85, 0.37, 0.97 and 0.96 for hinterstoisser, tless, tudlight, rutgers, tejani and doumanoglou datasets, respectively.
In order to explore the application of morphing technology in hypersonic aircraft, a hypersonic morphing aircraft based on variable sweep wing is proposed, then the trajectory of glide phase is optimized through multi...
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ISBN:
(纸本)9781538666630
In order to explore the application of morphing technology in hypersonic aircraft, a hypersonic morphing aircraft based on variable sweep wing is proposed, then the trajectory of glide phase is optimized through multiobjective optimization method. Firstly, the aerodynamic characteristics of different sweep morphing phases are offered, then the 3 degree of freedom dynamic model of free glide phase and the heat flux model of the leading edge of the wing are built. In the multiobjective optimization problem (MOP), the two optimization objectives are range of trajectory, the total heat of the leading edge of the wing, and the optimization variables include the Mach numbers when the aircraft is morphing, the angle of attack of different phases. MOP is solved by using the multiobjective evolutionary algorithm based on decomposition (MOEA/D). The numerical simulation results show that the proposed method can obtain the Pareto Front. Also, comparing to the non-morphing aircraft, the aircraft can achieve a larger range and a smaller total heat of the leading edge of the wing.
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