The authors present their latest research results and developments of a code generator for Matlab/Simulink block diagrams and to download the generated code onto safety related systems such as a safety PLC (programmab...
详细信息
The authors present their latest research results and developments of a code generator for Matlab/Simulink block diagrams and to download the generated code onto safety related systems such as a safety PLC (programmable logic controller). An example demonstrates the different stages for code generation, evaluation and conversion before such code can be used in process industries. Systematic approaches are necessary when such source code is embedded in process units. To the best knowledge of the authors, Matlab/Simulink source code has not been transferred on safety PLC before. Matlab/Simulink is an advanced and matured programming environment, especially for simulations of engineering processes and systems. Hardly no hardware exists, when it comes to download the developed algorithms and to use it in real world applications and so far this approach is the only one for using developed and tested Matlab/Simulink software on an safety related system.
Multiple petaflops-lass machines will appear during the coming year, and many multipetaflops machines are on the anvil. It will be a substantial challenge to make existing parallel CSE applications run efficiently on ...
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...
详细信息
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.
OPC is a matured and accepted standard in industries, but hardly used in industrial applications developed at universities, especially in Europe. Publications in this area, either using OPC-communication or developing...
详细信息
OPC is a matured and accepted standard in industries, but hardly used in industrial applications developed at universities, especially in Europe. Publications in this area, either using OPC-communication or developing applications have been hardly increased over the past several years. This paper reports the current state of the standard, but also describes current problems and how they can be managed and overcome. The authors also give an overview of the recently published new standard, which is called: OPC unified approach. After the fundamentals are described in this paper, the authors present their experiences with OPC to combine it with methods and procedures to develop a modern maintenance system. It also reports current developments at the department of computer Architecture and System programming at the University of Kassel.
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 ...
详细信息
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 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...
详细信息
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.
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...
详细信息
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.
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...
详细信息
Developing security-critical applications is very difficult and the past has shown that many applications turned out to be erroneous after years of usage. For this reason it is desirable to have a sound methodology fo...
详细信息
暂无评论