The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this work, the shock survivability of MEMS gyroscopes under different shock conditions are investigated. Both shock experiments and numerical simulations are carried out to study the influences of the shock load level, duration and damping conditions. The simulation results are consistent with the experimental results. The results indicate that the selections of natural frequencies and air-damping...
Named Data Networking (NDN) is a data-centric architecture designed for the future Internet. Existing works show that NDN brings significant performance improvement for typical content-centric applications, and can also fit the mobile environment well. However, directly applying NDN to Vehicular Ad hoc NETworks (VANETs) is confronted with great challenges due to the high mobility of vehicles. Most...
In this paper, a novel opportunistic protocol is proposed for the two-way relaying systems with direct link. Unlike the existing protocols, the proposed protocol opportunistically exploits analog network coding and the direct link. The proposed protocol switches its strategies to support two traffic flows simultaneously or support only one traffic flow based on instantaneous channel conditions. An...
This paper proposes a relay selection scheme for wireless cooperative communication systems (CCS) utilizing a decode and forward protocol. The proposed scheme is suitable for systems employing M-ary PSK modulation schemes. A single relay node is chosen to cooperate with the direct link in delivering the message signal. This choice is based on the absolute value of the log-likelihood ratio (LLR) of...
This paper presents quantum simulation to analyze the effect of temperature on 100 nm symmetric tied gate double heterostructure In AlAs/InGaAs DGHEMT. In order to account the quantization effects manifesting in the nano-scale channel, a Density Gradient model or Quantum Moments model has been employed. DGHEMT is widely used for high frequency microwave applications and to investigate the device reliability...
In this paper a new control method is introduced for grid-connected inverter (GCI) to inject sinusoidal current to grid in presence of nonlinear load and distorted grid voltage conditions. The proposed control method consists of two parts: current reference generation and current controller. To generate current reference, a new algorithm, based on Recursive Discrete Fourier Transform, is proposed...
This paper presents a simple method for detection of commutation instants of the extensively used low power brushless DC motors. In the proposed method the commutation signals are obtained without any phase shift circuit which is required in the conventional sensorless control methods. So the overall cost is decreased and the sensorless control is easy to be implemented. In the proposed method, instead...
The DDS (Data Distribution Service) is real-time communication middleware used for a large-scale network system. For performance evaluation of the DDS, we developed a DDS simulator on QualNet. The performance measures obtained from the DDS simulator include discovery-completion time, end-to-end message-transfer delay, the number of data messages and the user-data processing time. The DDS simulator...
The voids at the glass frit bonding interface and inside the frit layer not only provide leakage pathways to deteriorate the sealing performance, but also reduce the effective contact area of the bonding interface to decrease the bonding strength. In this research, the micro composite glass frit bonding structure with redundant bleeding frit and bonding gap controllable was designed as the model to...
Reliability is one of the most important parameters of dependability. It is addressed whenever we want reliable, available and safe systems. Indeed, reliability acts on the availability and security of systems. It must be considered throughout the overall life cycle of the product or system (design, manufacturing, operation). The objective of this communication is to build an overall approach of reliability...
This article deals with a case study of application of wireless sensor networks for control of emergency situations in an automated manufacturing. The control design approach of manufacture, which is using as self-energy production solutions and municipal utility services, is discussed. The correlation of manufacturing processes with emergency situations in critical infrastructure is taken in the...
In this work, we present a simplified successive cancellation list decoder that uses a Chase-like decoding process to achieve a six time improvement in speed compared to successive cancellation list decoding while maintaining the same error-correction performance advantage over standard successive-cancellation polar decoders. We discuss the algorithm and detail the data structures and methods used...
Network availability is an essential feature of an optical telecommunication network. Should a failure of a network component occur, be it a link or a component inside a node, network control plane must be able to detect the failure and reroute the traffic using spare components until a repair is done. Shared risk link groups (SRLGs) are used to describe a situation where seemingly unrelated logical...
In this paper, a system of coupled and interacting models for dynamic electric and thermal behavior of an electrical machine is presented. The models are specifically designed for maximum execution speed and are suitable for simulating the machine behavior over long time periods and even the entire lifetime of the machine. Nevertheless, the results proved to be remarkably accurate. Arbitrary electrical...
This paper presents a novel unified access conditioner for microgrid, providing a flexible and reliable solution for custom power supply and renewable energy sources integration. The modular multilevel converter is applied to achieve high reliability and low system cost. The dual-active-bridges are applied to obtain electrical isolation and flexible power interfaces. Detailed simulation results verified...
New architectures introduction succeeded in reducing the device performances dispersion in scaled transistors, but as a consequence the relative importance of oxide reliability increased. In this work we present original results of charged interface traps impact on bulk, FDSOI and Fin FETs performances. Traps time constants are analyzed and recoverable and permanent degradation proportions are derived...
An innovative E-simulation model based on E-experiment for misalignment fault detection and diagnosis that are commonly observed in rotating machinery systems has been proposed in this paper. Coupling misalignment is a condition where the shafts of the driver machine and driven machine are not on the same center line. Non-coaxial misalignment may be either due to the parallel misalignment or an angular...
Evaluating the performance of a computer system requires the use of representative workloads. Therefore it is customary to use recorded job traces in simulations to evaluate the performance of proposed parallel job schedulers. We argue that this practice retains unimportant attributes of the workload, at the expense of other more important attributes. Specifically, using traces in open-system simulations...
During the 2011 East Japan Great Earthquake Disaster, many people used social media such as Twitter to get important information for their lives. But, generally, social media also has bad side, that is wrong information diffusion problem. In this paper, we will propose a novel multiagent-based information diffusion model, the Agent-based Information Diffusion Model (AIDM), and evaluate it. Up to now,...
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...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.