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Deposition is found in many engineering processes, such as the asphaltene deposition in oil pipelines/wellbores, and biological and chemical foulings in pipes or heat exchangers. These deposition processes usually occur in a two-phase flow environment. This study develops a model for two-phase flow with deposition in vertical pipes. The model consists of three modules: Fluid Transport, Particle Transport,...
A research approach of crack detection of rotating shafts based on acoustic emission (AE) signals and machine learning is proposed in this paper. The relationship between crack intensity and domain features are investigated, and the features which could well indicate the crack condition are selected for modelling and crack prediction. Multiple Linear Regression (MLR), Artificial Neural Networks (ANN)...
In this paper, a tracking control scheme is proposed for optical manipulation of biological cell with unknown trapping stiffness. The requirement on the model of the trapping stiffness is eliminated in the proposed formulation and thus system identification and calibration are not needed. The unknown trapping stiffness and the uncertain dynamic parameters are estimated separately, with on-line update...
Current robotic manipulation techniques for optical tweezers assume that the trapping stiffness of optical trap is constant and exactly known. In addition, the dynamic interaction between the cell and the manipulator of laser source is usually ignored in the analysis of the optical manipulation problem. In this paper, a control scheme is proposed for optical manipulation of biological cell with unknown...
Optical tweezer is a useful tool for non-contact micromanipulation tasks because it can manipulate biological cells precisely without causing damage to the cells. In many optical manipulation techniques, the measurement of the velocity of the cell is necessary. Since it is difficult to measure the velocity of the cell, the velocity information is usually obtained by differentiating the position of...
Due to the coexistence of different generations of mobile radio technologies, more and more mobile network operators are keen on deploying multiple radio technologies on a single cell site and carry their traffic over a common transport network. This paper studies such a collocated multiradio system: collocated LTE and HSDPA. Firstly, we investigate the potential gain by using a shared transport network...
Accurate estimation of SOC is the crucial factor to ensure safe operation of a battery. Current estimation methods are derived based on electric equivalent circuit models that do not take into account dependences of SOC on lithium concentrations, temperature, and other electrochemical phenomena. A new model for a Li-polymer battery was developed based on a 1D electrochemical microcell model. This...
A two dimensional model for a single cell is developed by connecting one dimensional electrochemical micro cell models by current collectors. The model is capable of representing terminal behavior along with internal physical variables that include temperature, potentials and ion flows. However, the model is very computational intensive and needs to be reduced for implementation into real time applications...
Determining the attribute weights is an important process in multiple attribute decision making. Many methods have been proposed for determining the attribute weights, either by making use of decision makers' subjective preference judgments, or by utilizing the objective information of the alternatives, i.e., the decision matrix. However, in uncertain decision environment, sometimes, interval numbers...
This paper proposes an analytical model for dimensioning transport bandwidths in the Long Term Evolution (LTE) access network. In this work the criterion for dimensioning is the transport network delay QoS (at the packet level). The presented analytical model takes into considerations the key features of the LTE radio interface and the use of Differentiated Service (DiffServ) QoS scheme in the LTE...
This paper presents an adaptive region tracking control for Autonomous Underwater Vehicle (AUV). The AUV is required to track a moving region to accomplish a given task. The desired target is specified as a region rather than a point so that the control effort used to track the region is minimal. In the applications where the accuracy is of utmost importance, the desired region can be chosen to be...
This paper presents analytical models to dimension the transport bandwidths for the S1 interface in the Long Term Evolution (LTE) Network. In this paper, we consider two major traffic types: elastic traffic and real time traffic. For each type of traffic, individual dimensioning models are proposed. For validating these analytical dimensioning models, a developed LTE system simulation model is used...
Reliability study of high-κ (HK) gate dielectric based transistors has become imperative for the current and future CMOS technology nodes as the industry shifts towards replacement of conventional silicon oxynitride (SiON) with hafnium-based oxides. One of the key requirements of any oxide reliability study is a quantitative assessment of the time dependent dielectric breakdown (TDDB) lifetime using...
This paper presents dimensioning of an IP-based UMTS Terrestrial Radio Access Network (UTRAN) with multiple Node Bs connected to one RNC, where the applied QoS architecture is based on Differentiated Service (DiffServ) with an integrated Weighted Fair Queue (WFQ) and Strict Priority (SP) scheduling. To provide an appropriate network dimensioning for guaranteeing a desired end-to-end QoS, a general...
Based on the combination of the genetic and Levenberg-Marquardt algorithms, a new method is developed to perform both local and global parameter extraction for the PSP MOSFET model. It has been successfully used to extract parameter sets for a 65-nm technology node. Numerical examples demonstrate its ability to obtain highly accurate model parameter values without excessive computational cost.
A mode-locking mechanism by active gain modulation is studied numerically and experimentally. The parameter window for the emission of stable pulse trains was found. Pulses as short as 3 ps (~0.5 pJ) were characterized by second-order autocorrelation.
First the surface-potential-based compact MOS model, PSP, is introduced. After a discussion of the general advantages of this model, it is benchmarked against measurements from the 45 nm technology node. Finally, we zoom in on the modeling in PSP of two effects that are of special importance for RF applications: distortion and noise.
During the interruption process of SF6 circuit breaker, electrode erosion will occur inevitably, which leads to the contamination of pure SF6 and the alteration of arc characteristics. In the paper, to one puffer type circuit breaker, simulation studies are focused on the application of Spalart-Allmaras model for turbulence and species transport model for metallic vapour diffusion. In addition, the...
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