Massive Internet of Things (mIoT) has provided an auspicious opportunity to build powerful and ubiquitous connections that faces a plethora of new challenges, where cellular networks are potential solutions due to their high scalability, reliability, and efficiency. The Random Access CHannel (RACH) procedure is the first step of connection establishment between IoT devices and Base Stations (BS...

The numerical simulation of a GaAs MESFET device on a transputer-based parallel system is presented. The physical modelling consists of a comprehensive two-dimensional energy transport model taking into account thermal heating effects within the device lattice. The semiconductor equations were solved by an SOR point iterative method using a finite difference discretisation scheme. Algorithms ta...

VLSI technology CAD (TCAD) requires integrated, physics-based tools for predictive process, device, and (small-scale) circuit simulation. Computational efficiency is desirable, and indeed essential if the TCAD system is to be used in manufacturing CAD involving statistical simulation. Conventional TCAD systems comprise robust, numerical process and device simulators which drive optimization of ...

The fundamental limits of performance for a general model of information retrieval from databases are studied. In the scenarios considered a large quantity of information is to be stored on some physical storage device. Requests for information are modeled as a randomly generated sequence with a known distribution. The requests are assumed to be “context-dependent”, i.e., to vary according to t...

In order to shorten the refrigeration time of beverage machine, improve cold storage capacity, reduce loss energy, and performance device. From perspective food safety, aluminum was selected as material, a spiral tube heat exchanger used simulate process theoretically, set economical reasonable energy equipment designed. By establishing physical mathematical model device, using ANSYS Workbench ...

Physical behaviors (e.g., sleep, sedentary behavior, and physical activity) often occur in sustained bouts that are punctuated with brief interruptions. To detect classify these interrupted bouts, researchers commonly use wearable devices specialized algorithms. Most algorithms examine the data chronological order, initiating terminating whenever specific criteria met. Consequently, may encapsu...