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As the applications of micro electronic mechanical system (MEMS) are booming, more and more research and development activities are involved in the MEMS industry. For every new MEMS product with new functions, the manufacturing process will be tailored to cope with the changes. This requires reliability work to ensure the robustness of the new process. Thus, failure analysis plays an important role...
This paper presents a smart system based on Low Power Wide Area networks for a remote monitoring of technological room in unstaffed railway stations. The paper aim is the design of an efficient network scheme characterized by improved performance compared with the standard solution. Adopting an innovative smart System Control Strategy and a custom network topology, good results are reached in terms...
A large number of sensor nodes are deployed to remote locations and left unattended for a long time in wireless sensor network applications. When a battery-powered sensor node depletes its energy, it is assumed as “dead” and recharging or replacing the battery is not possible in most of the applications. Lifetime of the wireless sensor network depends on the efficient use of available restricted energy...
As technology scaling reaches nanometre scales, the error rate due to variations in temperature and voltage, single event effects and component degradation increases, making components less reliable. In order to ensure a system continues to function correctly while facing known reliability issues, it is imperative that the system should have the means to detect the occurrence of errors due to the...
The performance and low power requirement are becoming more and more challenging to fulfill for consumer product. On the opposite, a low failure rate at SoC level must be guaranteed to the end-customer. In that context, the insertion of in-situ slack monitor is known to be promising and efficient solution to manage the wear-out and more generally to minimize all margins related to manufacturing variations...
Different kinds of maintenance events in practical maintenance have different effects on equipment operation and task success. Based on the characteristics of multiple events and uncertainties of maintenance events, this paper analyzes the influence of various maintenance events on maintenance cost decision under different maintenance times, and determines the influencing factors of maintenance cost...
In this paper, we elaborate an SDN orchestration solution aiming at the dynamic adaptation of service chain paths thereby addressing high-availability requirements of 5G applications. We present an SDN orchestrator that periodically monitors the availability of the network and, if necessary, promptly adapts service chain paths to recover from congestion events and to preserve network QoS performance...
Degeneration data can provide important life information of solder joints. In this paper, a statistical regression model is proposed to evaluate the failure process of board level solder joints under vibration load. First, the fixed frequency and amplitude vibration test is conducted, and the voltage signals at both sides of the solder joint are collected through a bleeder circuit and a high-speed...
Energy interconnection (EI) is a logical consequence when ideas of open source and distributed scheme from the information field are introduced into the energy field. EI is essentially a typical cyber-physical system. This paper studies the new capabilities in sensing, computation, communication and control by analyzing its characteristics and demand. Firstly, we analyze the system architecture of...
Technology scaling trends led to an aggressive increase of SRAM cell sensitivity to process variation. More accurate and non-invasive methodologies must be considered to provide detailed bit-cell characterization focusing on writability margin. This work proposes a new metric using regular read/write operations based on the estimation of the maximum word-line voltage drop during write operations....
A cost-efficient framework for executing life-time dependability procedures is presented in this paper. The proposed framework relies on distributed sensors and actuators (embedded instruments) for self-awareness and adaptation, where the IEEE 1687 standard (iJTAG) is utilized for the dependability communications and the on-chip access of the instruments.
Condition based maintenance (CBM) is a practical and effective way to guarantee the product availability. Recent years the optimization strategy of CBM is widely studied by researchers. For product with measurable degradation performance, degradation modeling plays an important role in CBM. Inverse Gaussian process has many superb properties in dealing with covariates and random effect. In this paper,...
Temporal databases are characterized by significant data amount monitored over the time. Such values are stored with regards on validity during the whole time spectrum supporting decision making, reliability definition, analysis, progress monitoring and creating future prognoses. When dealing with various granulairty of changes, management must be shifted into attribute granularity level to remove...
CoAP is a web transfer protocol that provides basic RESTful services for IoT devices. Since CoAP operates on top of UDP, CoAP must support additional congestion control and reliability mechanisms. However, CoAP is originally designed to allow implementations that do not maintain any end-to-end connection information. Thus, the default congestion control mechanisms are not capable of adapting to network...
Combining with the characteristics of smart distribution grid, this paper expounded the architecture, control strategy and key technology of self-healing control in smart distribution grid and proposed the “three-layer with seven-unit” architecture and the option method of control strategy. Combining with the characteristics of smart distribution grid containing distributed power, this paper introduced...
This paper lays the foundation for the development of an innovative electro-mechanical actuator for flight-control surfaces. The main features of the enhanced system will be the introduction of new sensor types and health monitoring capabilities. A dedicated test bench has been developed in order to perform endurance tests, leading the mechanical components to failure. In this view, a Condition Monitoring...
Advances in sensing, wireless communication, and data analytics have enabled various monitoring systems for smart health applications. However, many challenges remain to deploy such systems in actual homes, such as achieving robustness, unobtrusiveness, fault tolerance, privacy, and minimal user burden. This paper presents how these challenges were overcome in the realization and successful prototype...
The promise of SDN/NFV to offer enhanced functionalities to the service provider networks is now tangible as both technologies have started being steadily investigated and experimentally demonstrated. However, a number of research challenges have not been fully addressed yet. More specifically, a limited interest has been devoted on how to assure reliability and QoS performance while data traverse...
LoRa, an emerging wireless technology, is examined for long range communication performance in a large area. Although LoRa shows good performance for long-distance transmission in the countryside, its radio signals can be attenuated and interfered with by buildings, trees and other signal sources. In urban areas, our observation shows that LoRa requires a dense deployment of LoRa gateways to ensure...
Service identification meets with new challenges with overwhelming rise of categories and numbers of services in big data scenarios. Most of the current service identification approaches have paid little attention to the granularity of indicator for service identification, neither do they provide with any trustworthy monitoring mechanism during the process of service identification. To address the...
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