The environment protection is one of the most actual problems, because of the fact that the pollution became a major danger for the planet life. The environment pollution is caused because some pollution agents are in...
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The environment protection is one of the most actual problems, because of the fact that the pollution became a major danger for the planet life. The environment pollution is caused because some pollution agents are in a too big quantity and for la long time that they become dangerous for the human health, for the flora, for the fauna and for the constructions too. The pollution sources can be classified in natural and artificial sources. The quality of the environment from a specific area at a certain time can be appreciated by: a) the air quality;b) the water quality;c) the soil quality;d) the health level of the population;e) the deficit of animals and plants species that are accounted for. In the paper there are given the urban traffic on the principal routs inside the Cluj-Napoca municipality. The traffic is the constituent part of the research activity of the national project having the destination the monitoring of the noise and vibrations into an urban agglomeration, applied to the Cluj-Napoca town. This study is the first step for the "noise map" asked for the Romania integration in the European Union for the team researchers of TUCN under the direction of the prof. dr. ing. Mariana ARGHIR.
Network Intrusion Detection Systems (NIDS) require the ability to generalize from previously observed attacks to detect even new or slight variation records of known attacks. As an intrusion detection system can be re...
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ISBN:
(纸本)1601320752
Network Intrusion Detection Systems (NIDS) require the ability to generalize from previously observed attacks to detect even new or slight variation records of known attacks. As an intrusion detection system can be regarded as classification problem, we use Artificial Neural networks for detection. Using a benchmark study and set from the KDD (Knowledge Data Discovery and Data Mining) competition designed by DARPA and Multi-layered perceptron neural network, this Paper will aim to solve a multi class problem using MLP in to distinguish the attack records from normal ones, and also identify the attack type. In addition, it shows how to use Tikhonov regularization parameter to optimize the optimal network architecture in order to increase the system performance. The results show that the designed system is capable of classifying records with 98.34% accuracy with two hidden layers of neuron. Finally, the performance of the benchmark study is compared with our results.
Systems of polynomial equations over an algebraically-closed field K can be used to concisely model many combinatorial problems. In this way, a combinatorial problem is feasible (e.g., a graph is 3-colorable, hamilton...
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ISBN:
(纸本)9781595939043
Systems of polynomial equations over an algebraically-closed field K can be used to concisely model many combinatorial problems. In this way, a combinatorial problem is feasible (e.g., a graph is 3-colorable, hamiltonian, etc.) if and only if a related system of polynomial equations has a solution over K. In this paper, we investigate an algorithm aimed at proving combinatorial infeasibility based on the observed low degree of Hilbert's Nullstellensatz certificates for polynomial systems arising in combinatorics and on large-scale linear-algebra computations over K. We report on experiments based on the problem of proving the non-3-colorability of graphs. We successfully solved graph problem instances having thousands of nodes and tens of thousands of edges.
This paper presents dynamic behaviors of autonomous solid oxide fuel cells (SOFC) with AC bus control. Both voltage and frequency control are utilized to achieve load-sharing of the studied SOFC feeding isolated loads...
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This paper presents dynamic behaviors of autonomous solid oxide fuel cells (SOFC) with AC bus control. Both voltage and frequency control are utilized to achieve load-sharing of the studied SOFC feeding isolated loads. A DC-to-DC converter is connected to the output terminals of the studied SOFC for stabilizing output voltage and current fluctuations under different loading conditions. The PWM inverter connected to the output terminals of the DC-to-DC converter is operated under voltage-controlled mode to regulate the voltage profile across the connected loads. It can be concluded from the simulation results that the proposed voltage and frequency droop controllers of the PWM inverter may operate satisfactory under stand-alone mode.
The paper contains our study regarding the reduction of urban noise using the sonic barrier walls as to the EMPARA procedure, which is based on the simplified standard method for measurements and computing of surface ...
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The paper contains our study regarding the reduction of urban noise using the sonic barrier walls as to the EMPARA procedure, which is based on the simplified standard method for measurements and computing of surface traffic noise inside urban agglomeration, as they are given in SRM2 laws (Netherlands standards). The studies are made taking into account all parameters that characterize the noise attenuation. The graphical representations are made considering "n-1" constant parameters, and one parameter varying with time. In this way we obtained the influence of each parameter in the diminution of the urban noise using the noise barrier walls. In addition we realized a measurement for a real barrier wall inside the city of Oradea. Our study also contains a FEM model for the analyzed configuration. The comparison between measurements and computation was fair enough, which means that our theoretical study is acceptable and characterizes the noise pollution and its diminution in the urban agglomeration. The measurement-device was a CENTER 322 Sound Lever Meter.
This paper is dealing with redundant optoelectronic data transmission with special respect to laser channels. The concept of the generalized erasure channel (GEC) is used to determine the probability of undetected err...
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This paper is dealing with redundant optoelectronic data transmission with special respect to laser channels. The concept of the generalized erasure channel (GEC) is used to determine the probability of undetected error for some binary symmetric and non-symmetric channels protected by appropriate codes. In detail, communication via different binary symmetric channels (BSCs), generalized erasure channels and symmetrized binary non symmetric channels (BNSCs) is investigated. Simple upper bounds are given, relating the new formulas to that one of the BSC Finally the results in connection with an inequality for proper codes are applied to multi wavelength optical transmission through channels generated by semiconductor lasers.
We present an analysis of the feasibility of executing a parallel bioinspired model of laser dynamics, based on cellular automata (CA), on the usual target platform of this kind of applications: a heterogeneous non-de...
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The paper presents a study for imagining of generalized mechanical model for the human body/seat assembly. The model will be used for the dynamics analyze of the human body constituent parts, under the vertical vibrat...
Safety-related systems mostly comprise hardware and software solutions. Due to the increasing application of complex hardware and software systems, the software systems have to be considered regarding safety as well a...
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Numerical approximate computations can solve large and complex problems *** have the advantage of high *** they only give approximate results,whereas we need exact results in some *** is a gap between approximate comp...
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Numerical approximate computations can solve large and complex problems *** have the advantage of high *** they only give approximate results,whereas we need exact results in some *** is a gap between approximate computations and exact results. In this paper,we build a bridge by which exact results can be obtained by numerical approximate computations.
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