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An Ikeda map embedded genetic algorithm is introduced in this research in order to solve the order picking problem. The chaos based algorithm is compared against the canonical pseudo-random number based genetic algorithm over thirty test instances of varying complexity. From the results, the chaos based genetic algorithm is shown to have better overall performance, especially for larger sized problem...
Higher order information includes k-nearestneighbor information and k-order region information that are of great importance when the first order or lower order information is not functioning. Despite of the importance of direction in spatio-temporal analysis, directional higher order information has received almost no attention. This paper introduces a new directional higher order information dissimilarity...
The secrecy gain of a lattice is a lattice invariant used to characterize wiretap lattice codes for Gaussian channels. The secrecy gain has been classified for unimodular lattices up to dimension 23, and so far, a few sparse examples are known for l-modular lattices, with l = 2, 3. We propose some constructions of 5-modular lattices via the Construction A of lattices from linear codes, and study the...
The paper analyzes the optimal conditions for thermal power conversion system. Geothermal water source heat and thermo-electrical conversion is performed with cells TEG (thermo electric generators) based on the Seebeck effect. This study developed in the frame of a national research project is useful for ensuring the energy conversion in conjunction with storage Li-Ion battery. Design method uses...
NIST SP800-22 is a statistical test suite for determining whether given sequences are random or not for each statistical test. The statistical test suite has been used widely. However, it was not mentioned in the statistical test suite how many the ratio of passing all the 15 kinds of tests should be for the target generator to be regarded as the ideally true random number generator. In this paper,...
This research shows an overview of geothermal power generation and common methods used to harness it. In this way, the semiconducting method with thermoelectric devices is proposed to generate electricity by the use of waste heat of spas. Nowadays thermoelectric power generation is not so common due to its implementing costs. On the other hand, many places have no conditions to generate geothermal...
This paper presents a new hybrid algorithm based on the particle swarm optimization (PSO) and the gravitational search algorithm (GSA) for solving the optimal power flow (OPF) in power systems. Performance of this approach for the OPF problem is studied and evaluated on the standard IEEE 30-bus test system with different objective functions. Simulation results on the OPF problem show that the hybrid...
This paper presents a method of dynamic allocation of the power reserve among frequency regulation's participants. Cooperative game theory approach is used for analysis of power reserve distribution. Technical and economical aspects of the issue are observed. Mathematical model of automation used for selection of optimal sharing of profit among participants was built.
An intermittent or non-existent power grid currently plagues most of Haiti. Haitians, therefore, use diesel and/or other forms of power to supplement or replace the grid, often a costly expense. Batteries that charge when power is available are the only option for around-the-clock power on demand. Lead acid battery packs that are environmentally harmful, wastefully large and unreliable are currently...
When the AAG protocol was first introduced, braid groups were proposed as platform group. However, there are studies that successful attack AAG with braid groups, one main attack method is the length-based attack. Searching for a new platform for AAG, Garber, Kahrobaei, and Lam studied polycyclic groups generated by number field and concluded that they are resistant against the length-based attack...
The authors present the results of experimental work on a small-power direct driven permanent magnet synchronous generator reactive power compensation comparison with two methods. Particular generator is targeted for small size wind power systems, and is tested on a wind turbine emulator that consists of an AC induction motor, a frequency converter and a torque feedback. Generator output power was...
This paper presents a comparative analysis between the energy efficiency of two wind generator designs. A hypothesis is presented that generators for wind applications should be designed based on their energy efficiency instead of rated efficiency. As wind generators are working with variable rotational speeds and power levels, resulting in changes in their electrical efficiency, there is a need for...
In this paper the factors influencing the self-excitation process in the synchronous generator and a method of this process improvement are described. In the case of high stator windings inductance commutation process in the rectifier at the generator output interfere with successful self-excitation, which is confirmed by analytical calculations and practical experiment. Use of the excitation current...
The surprising rates of electrification have experienced numerous populated counties in Asian region such as Bangladesh, Indian, China and Indonesia. To meet the increased demand for both power and grid services across the region will require innovation approach and the term discrete power system microgrid has introduced. As the reliability and quality of power demand have increased day by day, power...
This paper presents an algorithmic procedure for determining the cryptographic key properties and hence matching with the required complexity and strength to assure a more reliable and secure designs of cryptographic systems. The designed algorithm is capable to provide the cryptographic key structure based on optimum solution approach. Using the Hardware Description Language (HDL), Verilog, the key...
In this paper, a novel 3-dimensional discrete chaotic system is introduced. The calculated Lyapunov exponents of the system are 1.0287, 0.024615 and −0.58505. Numerical simulations show that the dynamic behaviors of the chaotic system have chaotic attractor characteristics. Based on the chaotic system and a chaos generalized synchronization (GS) theorem, a 6-dimensional chaotic generalized synchronic...
Based on a stream encryption scheme with avalanche effect, this paper introduces a block encryption scheme with avalanche effect (BESAE), gives the definition of ideal block pseudo random number generators (BPRNG). Using any key stream generated by an ideal 2d word BPRNG with different seed to decrypt the ciphertext encrypted via the ideal BPRNG and the BESAE will generate an avalanche-liked text...
In this article we describe two alternative order-preserving encryption schemes. First scheme is based on arithmetic coding and the second scheme uses sequence of matrices for data encrypting. In the beginning of this paper we briefly describe previous related work published in recent time. Then we propose alternative variants of OPE and consider them in details. We examine drawbacks of these schemes...
Wind power is among the rapidly spreading renewable energy sources in the past years. It has been a trend that renewable energy sources including wind generators be either connected in the distribution level near the loads, or be operated in islanded operation. However, since wind generators are highly dependent on wind speed which changes throughout the day, wind output of wind power plants are highly...
Shifting towards higher penetration of diverse renewable energy sources (RESs) in power systems is motivated mainly by reducing carbon emissions. In the long term of several decades, which we refer to in terms of the future grid (FG), balancing between supply and demand will become more challenging. Also, displacing conventional generators with RESs, especially inverter-based and intermittent RESs,...
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