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To study analysis method of performance degradation during long term operation based on function simulation, accelerated degradation test was carried out on the power supply module directly, and the test data was used for reliability analysis. As the same time, accelerated degradation test was carried out on the key components in power supply circuit. The test data was injected into the functional...
On the basis of Lu's syndrome-based decoding algorithm, we propose an improved decoding algorithm for turbo product code, which has lower complexity and latency. On one hand, the proposed algorithm further reduces the computational complexity and the decoding latency by simplifying the calculation of syndrome and selecting a proper number of least reliable bits. On the other hand, this algorithm obtains...
This paper reviews many lower and upper bounds for consecutive-k-out-of-n systems presented over the last three decades. The reason is a revived interest to accurately estimate the reliability of (very) large consecutive systems, where exact calculations can be challenging. Main examples are novel nano-architectures targeting FinFETs, nano-magnetic and molecular technologies (where accurate estimations...
We evaluate a routing metric, called TXPFI, which captures the expected number of frame transmissions needed for successful delivery of data in Wireless Sensor Networks (WSNs) featuring non-fully cooperative nodes and unreliable links. The study, which addresses the exploitation of the TXPFI in routing protocols of distance-vector type, assesses the impact of different network settings on the performance...
According to the relationships among attitude error of mathematical platform, installation angle and measurement misalignment, the measurement misalignment matching algorithm is derived. In order to ensure the system works well on the condition that the mount angles of the slave INS are big, the optimal attitude matching algorithm is presented detailedly based on the measurement misalignment matching...
As an extension of binary low-density parity-check (LDPC) codes, non-binary LDPC (NB-LDPC) codes show significantly better performance when the code length is moderate or small. Recently, enhanced iterative hard reliability based (EIHRB) decoding algorithm is proposed to reduce the computation complexity. However, the EIHRB algorithm suffers a lot from significant performance degradation when the...
Computational simulations and reliability analysis were used to optimize an automated ultrasonic system used in pipe inspections in a manufacture plant in operation. Through the application of these tools the quality of the final product could be improved from more efficiency inspections. The main purpose was to establish the influence of each variable involved in the capacity of the ultrasonic system...
This paper presents a novel reconfigurable power management architecture for PV modules. This architecture allows for operation or isolation (islanding) of individual or groups of cells. Flexible Voc and Isc combinations may be achieved with switching speeds up to 1MHz. Multiple advantages and functionalities can be achieved, such as lower power losses if one cell is shaded or degrading, variable...
The use of sensor networks has increased rapidly over the last years. Due to their low resources, sensors come along with new issues regarding network security and energy consumption. Focusing on the network availability, previous studies proposed to protect the network against denial of service attacks with the use of traffic monitoring agents on some nodes. But if the control nodes go down or get...
The heterogeneous cellular networks (HCNs) will be the typical layout of the next generation mobile networks. Understanding the aggregate interference from multi-tier heterogeneous base stations (BSs) of HCNs is the key for research on network deployment and interference management. In this paper, we propose a statistical model for quantifying the aggregate interference in HCNs and evaluating its...
Wireless Sensor Networks (WSNs) often need to operate under strict requirements on energy consumption and be capable of self-adapting to the presence of non-trusted nodes which do not fully cooperate in the packet forwarding operation. In such an environment, the mechanism employed for the calculation of routing paths of minimum cost in terms of the number of transmissions executed for the reliable...
Turbo decoder performance improvement is considered in the work. While on the first iteration of the conventional turbo decoder a priori reliabilities are supposed to be zero in the new scheme it is proposed to estimate and set these values. Algorithm for generation of a list of a priori LLRs is described, where each list sequence is used as an input to independent turbo decoder. As a result list...
This paper presents an autonomic algorithm for constructing minimum spanning trees in a distributed system. Processes are virtually organized on a hypercube-like topology, called VCube. The spanning trees are dynamically created from any source process and regenerated transparently when processes become faulty. Any tree reconstruction is autonomously done based on the virtual topology and on fault...
As an indispensible part of electronic equipment, the reliability of the whole system is affected by the degradation performance of power MOSFET tube. Based on geometry, material properties and boundary conditions, the repeated testing can be reduced, and the period of failure analysis can be shortened. This article is based on the finite element model of power MOSFET TO-263, electric thermal — mechanical...
This paper presents a new meta-heuristic evolutionary algorithm using Cat-Swarm-Optimization (CSO) for an optimal placement of multiple distributed generators to achieve a higher overall system reliability in large-scale primary distribution networks. Normally, reliability issues are of major importance in power distribution system. Thus, a composite reliability index is used in the proposed work...
His work proposes a hierarchical Coloured Petri Nets (CPN) model for finding the most reliable path in an oil pipeline network. A path is achieved with the opening of valves along it linking the pipes and with the closing of the adjacent ones to isolate it from the rest of the pipeline network. This work has two goals: firstly to calculate the dynamic reliability of the valves engaged to open (openers)...
The development of 3D-silicon integrated circuits is an increasing demand especially regarding to advanced 3D-packages and high performance applications, with the intend to miniaturize and to reduce costs. Through-silicon-vias (TSV), interconnects and landing pads have a strong mismatch in proportions. Due to high temperature as well as high applied currents, the reliability of the systems and components...
Electrical Distribution Networks face new challenges by the Smart Grid deployment. The required metering infrastructures add new vulnerabilities that need to be taken into account in order to achieve Smart Grid functionalities without considerable reliability trade-off. In this paper, a qualitative assessment of the cyber attack impact on the Advanced Metering Infrastructure (AMI) is initially attempted...
Individuals working as a team introduce team related issues such as interpersonal coordination, supervision, time, and task management which are influenced by nontechnical, cognitive and social skills of team members. In control room of complex systems and under high task load situations, teams of operators are solely responsible for the ultimate decision making and control; but incomplete information,...
Products are increasingly accompanied by services such as maintenance or leasing contracts. The share of services of these so-called product-service systems (PSS) is expected to gain. The provider of such PSS-related services needs a comprehensive knowledge of the product properties and service requirements — particularly the product reliability and availability as well as necessary service resources...
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