نتایج جستجو برای: dual faults

تعداد نتایج: 179082  

2001
Said Hamdioui Rob Wadsworth John Delos Reyes Ad J. van de Goor

New memory technologies and processes introduce new defects that cause previously unknown faults. Dynamic faults are among these new faults; they can take place in the absence of the traditional static faults. This paper describes the concept of dynamic faults, based on the fault primitive concept. It further shows, based on industrial test results, the importance of such faults for the new mem...

In this paper, we introduce the concept of $g$-dual frames for Hilbert $C^{*}$-modules, and then the properties and stability results of $g$-dual frames  are given.  A characterization of $g$-dual frames, approximately dual frames and dual frames of a given frame is established. We also give some examples to show that the characterization of $g$-dual frames for Riesz bases in Hilbert spaces is ...

2017
Hussein Almulla Alireza Salahirad Gregory Gay

Testing costs can be reduced through automated unit test generation. An important benchmark for such tools is their ability to detect real faults. Fault databases, such as Defects4J, assist in this task. The Guava project—a collection of Java libraries from Google—offers an opportunity to expand such databases with additional complex faults. We have identified 11 faults in the Guava project, ad...

Journal: :Transactions of the Canadian Society for Mechanical Engineering 2017

Journal: :جغرافیا و مخاطرات محیطی 0

abstract the study of natural disasters is one of the most important primary principles for the growth of developing cities and the development of infrastructures. to this end, evaluating geodynamic activities using morphological data is considered one of the most pivotal applied methods. in this study, it was tried to detect active faults in yazd province using desert studies and remote sensin...

Journal: :energy equipment and systems 0
mostafa rahnavard school of mechanical engineering, university of tehran, tehran, iran mohammad reza hairi yazdi school of mechanical engineering, university of tehran, tehran, iran moosa ayati school of mechanical engineering, university of tehran, tehran, iran

this paper addresses the design of an observer-based fault diagnosis scheme, which is applied to some of the sensors and actuators of a wind turbine benchmark model. the methodology is based on a modified sliding mode observer (smo) that allows accurate reconstruction of multiple sensor or actuator faults occurring simultaneously. the faults are reconstructed using the equivalent output error i...

2003
Pedro G. DeLima Gary G. Yen

An advanced reconfigurable controller improved by a multiple model architecture is proposed as a tool to achieve fault tolerance in complex nonlinear systems. The most complete adaptive critic design, Globalized Dual Heuristic Programming (GDHP), constitutes a highly flexible nonlinear adaptive controller responsible for the generation of new control solutions for novel plant dynamics introduce...

2003
Joakim Aidemark Peter Folkesson Johan Karlsson

Time redundant execution of tasks and comparison of results is a well-known technique for detecting transient faults in computer systems. However, time redundancy is also capable of detecting permanent faults that occur during or between the executions of two task replicas, provided the faults affect the results of the two tasks in different ways. In this paper, we derive an expression for esti...

2008
Tae-Kyeong Yeu Hwan-Seong Kim Shigeyasu Kawaji

In this paper, we consider fault detection, isolation and reconstruction problem for descriptor systems with actuator faults and sensor faults, respectively. When actuator faults exist in the system, the fault detection and isolation (FDI) problem is solved through an unknown input observer regarding remaining faults excluded a specified fault as unknown inputs. Whereas, in existing sensor faul...

Journal: :SIAM J. Comput. 1997
Richard J. Cole Bruce M. Maggs Ramesh K. Sitaraman

In this paper we study the ability of array-based networks to tolerate worst-case faults. We show that an N × N two-dimensional array can sustain N1− worst-case faults, for any fixed > 0, and still emulate T steps of a fully functioning N × N array in O(T + N) steps, i.e., with only constant slowdown. Previously, it was known only that an array could tolerate a constant number of faults with co...

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