Pythagorean fuzzy sets have a lot of applications in the field of engineering and scientific problems. Also, besides, the power averaging (PA) operator can reduce the influence of evaluating extreme data from some bia...
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One of the key factors in successful information security management is the effective compliance of security policies and proper integration of "people", "process" and "technology". When ...
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This study investigates the computer perceptions of students at home, at school and at internet cafe, and the computer applications they preferred. For this purpose, the frequency of computer usage, the applications t...
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When dealing with complex systems design and application the notion of ontologies helps the process of application integration. To solve the problems with discover, interpret and reuse data we have to recognize ontolo...
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This scientific work presents a new method allowing to make a realistic prediction about software-reliability of critical systems. The main feature of this method enables the prediction of an estimate of the remaining...
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ISBN:
(纸本)9781622764365
This scientific work presents a new method allowing to make a realistic prediction about software-reliability of critical systems. The main feature of this method enables the prediction of an estimate of the remaining critical number of faults in the software. The algorithm uses already known methods such as Imperfect Debugging. This method can provide an even more reliable prognosis than the conventional methods. Furthermore, the new method describes two processes for critical failures (detection and correction process). The new algorithm considers a time, which is called repair-time. This time is important for the reliably prognosis and it is mathematically described as a time-function and used in the prediction model. The software reliability models (SRM's) are used since the 70's, these software reliability models are based on stochastic and aiming to predict the reliability for the software and also for the hardware. SRM's are based on model assumptions, some of which cannot be applied anymore. Thus, for the reliability engineering today, these models are insufficient.
Networks are among major power consumers in large-scale parallel systems. During execution of common parallel applications, a sizeable fraction of the links in the high-radix interconnects are either never used or are...
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This paper deals with achieving safe wireless communication for safety related systems with Bluetooth technology. In industries at present safe communication between the field bus/devices, PLC/controllers, and system/...
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ISBN:
(纸本)9781622764365
This paper deals with achieving safe wireless communication for safety related systems with Bluetooth technology. In industries at present safe communication between the field bus/devices, PLC/controllers, and system/applications (SCADA, DCS and MES systems) is achieved using safe wired industrial communication protocols such as safe field buses or safe Ethernet. To achieve safe communication, there are certain safety methods, these methods are discussed in the European standard document EN 50159-2. Wired industrial communication protocols implement these methods to achieve safe communication. To determine safety, mathematical equations are derived, which are suitable for wired communication, and which takes into account only the bit errors present in the transmission channel. As there are both bit errors and erasures (loss of information) present in the wireless channel, the mathematical equations derived for wired communication should also take into account erasure of information for wireless communication. This paper derives the mathematical equations for wireless communication to determine the safety and with the implemented safety methods for Bluetooth technology;safety integrity level SIL3 achieved is shown.
Software-Engineering is very important today. In industry (specifically by software critical system) it is important to produce high reliable software, i.e. software with low proportion of faults. To produce such reli...
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This study deals an integrated manufacturer-buyer supply chain system for imperfect production under stochastic lead time ***,defective rate has been followed as a function of production ***,the produced units have be...
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This study deals an integrated manufacturer-buyer supply chain system for imperfect production under stochastic lead time ***,defective rate has been followed as a function of production ***,the produced units have been inspected in order to screen the defective units but screening rate is less than the production rate and greater than the demand *** purchases the products from the ***,we assume that shortage during the lead time is permitted and demand during the shortage period is fully *** objective is to derive the optimal production rate,ordering quantity and to maximize joint total ***,two different models for different probability distribution functions of stochastic lead time demand have been *** numerical examples are provided to show the applicability of the proposed models comparing the optimum average ***,sensitive analysis,conclusion and future researches are presented.
The standard IEC/EN 61508 defines the requirements for safety systems to be applied to industrial plant safety independently of the application. It is not only intended as a basis for the development of future applica...
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ISBN:
(纸本)9784883254194
The standard IEC/EN 61508 defines the requirements for safety systems to be applied to industrial plant safety independently of the application. It is not only intended as a basis for the development of future application orientated standards, but also as a basis of all safety related electrical, electronic and programmable electronic systems, in order to apply it to safety critical applications. The purpose of this paper is to describe the SILCas tool which enables the user to determine the Safety Integrity Level (SIL) and the probability of failure on demand (PFD) for entire SIFs (consisting of sensor, signal processing, actuator) and for different system architectures.
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