llustrated Guide to Equine Diseases

Edisi

-

ISBN/ISSN

978-0-8138-1071-3

Deskripsi Fisik

705 hlm

Judul Seri

-

No. Panggil

-

Diagnostic Techniques in Veterinary Dermatology

Edisi

-

ISBN/ISSN

9781119233046

Deskripsi Fisik

320 hlm

Judul Seri

-

No. Panggil

-

Control in bioprocessing : modeling, estimation and the use of soft sensors

This book presents the most commonly employed approaches in the control of bioprocesses. It discusses the role that control theory plays in understanding the mechanisms of cellular and metabolic processes, and presents key results in various fields such as dynamic modeling, dynamic properties of bioprocess models, software sensors designed for the online estimation of parameters and state varia…

Biomolecular and Bioanalytical Techniques : Theory, Methodology and Applications

A sound knowledge of the biomolecular structure aided by appropriate bioanalytical techniques is indispensable to elucidate the mechanism of action of biological macromolecules and their function at large. The present book intends to provide a good introduction and understanding on a range of biomolecular and bioanalytical cum biophysical techniques and is primarily aimed at the advanced unde…

Control engineering

Edisi

-

ISBN/ISSN

9789811082979

Deskripsi Fisik

527 hlm

Judul Seri

-

No. Panggil

-

Quantum mechanics for pedestrians 1 ; fundamentals

Edisi

Second Edition

ISBN/ISSN

9783030004644

Deskripsi Fisik

519 hlm

Judul Seri

-

No. Panggil

-

Engineering mechanics 2 : mechanics of materials

Edisi

Second edition

ISBN/ISSN

9783662562727

Deskripsi Fisik

309 hlm

Judul Seri

-

No. Panggil

-

Composite Materials ; Science and Engineering

Edisi

Third Edition

ISBN/ISSN

9780387743653

Deskripsi Fisik

533 hlm

Judul Seri

-

No. Panggil

-

Evaluation of the combustion noise of passenger car diesel engines

Abstract The present article is concerned with the investigation of the combustion noise of passenger car diesel engines, which, especially in part load conditions, is clearly perceptible for passengers and passers-by. On the one hand, the state-of-the-art is shown by comparing three actual passenger cars on an acoustic roller test bench. On the other hand, a profound analysis of the combusti…

A new, systematic approach to determine the global energy optimum of a hybrid…

Abstract Hybridization is one of the key technologies to reduce the fuel consumption of a vehicle with internal combustion engine (ICE) significantly. Using at least one electric motor (EM), the kinetic energy of the vehicle can be recuperated and the ICE can operate more efficiently. The control strategy (CS) coordinates the torque of the ICE and the EM. If the driving cycle is known, the co…

An approach for predicting vehicle velocity in combination with driver turns

Abstract information such as average traffic flow on a road network link are not precise enough to enable detailed in-vehicle optimization strategies. Energy efficiency measures are further restrictedifthe vehicleis not aware ofthe destination of the trip. A modular and dynamic approach for predicting the vehicle speed in combination with driver turns is introduced. The objective is to adapt …

Potential of an improved energy efficiency in the chassis

Abstract In this paper, an approach is presented to determine the losses of the different components in the chassis system. An enhanced two-track model is extended by sub-models to simulate losses and efficiencies. These sub-models are describing the loss behavior, which is compared to the state of art. The energy saving potential of each component is analyzed by optimizing the package of ax…

Analysis and application of steering systems on a steering test bench

Abstract This paper focuses on the test bench-based application and analysis of electro-mechanical power steering (EPS). In the first part, the setup and physical structure of the test bench are described. It is shown how control parameter changes can be measured, using the assistance amplification as an example. In the next chapter, a method for a test bench-based pre-application is introdu…

High cycle fatigue and fatigue crack propagation behaviors of β-annealed Ti-…

Abstract Background: The effect of β annealing on high cycle fatigue (HCF) and fatigue crack propagation (FCP) behaviors of Ti64 alloy were examined, and the results were compared to those of mill-annealed counterpart. Methods: The tensile tests, stress-controlled HCF tests, and FCP tests were conducted, and the fractographic and micrographic analyses were performed before and after the te…

Synthesis and characterisation of hot extruded aluminium-based MMC developed …

Abstract Background: Improvement of the mechanical and tribological properties due to extrusion can be attributed to the improved density and excellent bond strength due to high compressive stress. Methods: To avoid the product defects mathematically contoured cosine profiled die was used for the thermomechanical treatment. Improvement of mechanical characterization like density, hardness, …

Structure-properties relationship in TRIP type bainitic ferrite steel austemp…

Abstract Background: Attractive properties of TRIP-type bainitic ferrite (TBF) steel ascribe to its unique microstructure of lath structure bainitic ferrite matrix and interlath retained austenite films. This work is concerned with obtaining ultra high-strength hot forged TBF steel with high elongation and excellent strength-elongation balance. Methods: The effect of austempering temperatur…

Delamination fracture analysis of an elastic-plastic functionally graded mult…

Abstract Background: A theoretical study was performed of mode II delamination in a multilayered functionally graded beam configuration with considering the material non-linearity. Methods: The fracture was analysed by the J-integral approach. Two laws (quadratic and exponential) for variation of the modulus of elasticity along the beam height were applied. The J-integral closed form non-li…

Deformation and stability of compressible rubber O-rings

Abstract Background: In rubber elastic models it is generally assumed that the bulk modulus is infinite, resulting in a material that does not change its volume and a pressure that cannot be evaluated from the material model. Methods: We have developed a general procedure that incorporates a finite bulk modulus. Using the developed framework accurate results can be obtained without the need…

Analytical and numerical studies on heat transfer of a nanofluid over a stret…

Abstract Background: The objective of the present study is to analyse the steady second-order slip flow and heat transfer of an incompressible viscous water-based nanofluid over a stretching/shrinking sheet both analytically and numerically. Methods: Using the scaling group transformations, a system of partial differential equations governing the flow and thermal fields is transformed into …

Surface characterization of austenitic stainless steel 304L after different g…

Abstract Background: The austenitic stainless steel 304L is widely used as a structural material for which the finished surface has significant effect on the service performance. A study of the grinding process with regard to the quality of the ground surfaces is therefore interesting from the point of view of both industrial application and scientific research. Method: This work investigat…

Effect of heating time of adsorber-collector on the performance of a solar ad…

Abstract This paper presents a numerical study of heat transfer inside the adsorber-collector of a solar adsorption refrigerator using the activated carbon AC35-methanol pair. The objective is to estimate the amount of the heat loss through the adsorber-collector, during the solar heating phase, and to determine the effect of heating time on the thermal efficiency of the system. The numeric…

On the deformation of almost cylindrical elastic beams

Abstract Background: The Saint-Venant problem for porous elastic cylinders is of interest both from the technical and mathematical point of view. The intended applications of solution are to mechanics of bone and to some engineering structures. Method: This work investigates the Saint-Venant problem for almost prismatic bars made of an isotropic porous material. We express the solution in …

Strain and stress conditions at crack initiation during shearing of medium- a…

Abstract Background: Strain and stress conditions in sheet metal shearing are of interest for calibration of various fracture criteria. Most fracture criteria are governed by effective strain and stress triaxiality. Methods: This work is an attempt to extend previous measurements of strain fields in shearing of steel sheets with the stress state calculated from the measured displacement fie…

Performance evaluation of multi-stage open-loop impedance pump

Abstract Background: Impedance pump is a simple valveless pumping mechanism, which transports fluid through the mismatch of impedance in the system. Mismatch in impedance occurs when an asymmetrical periodic excitation is exerted on the elastic tube. Periodic asymmetrical excitation will then produce a unidirectional flow. Considering a multi-stage system with a single and constant power so…

The performance improvement of dynamic voltage restorer based on bidirectiona…

Abstract In this study, bidirectional dc–dc (BDC) converterbased dynamic voltage restorer (DVR) is proposed for compensation of severe voltage sag/swell problems in a medium voltage system. Among these problems, voltage swells provoke the voltage rise at dc-link capacitor of DVR. This undesirable situation may explode the dc-link capacitors and switches, and cause high-power losses. In DVR …

Type-2 fuzzy logic PID controller and different uncertainties design for boos…

Abstract The aim of this work is the synthesis of a type-2 fuzzy logic PID controller for DC–DC boost converters. Performances of the proposed controller are evaluated and compared with those of type-1 fuzzy logic PID controller using the same structure and under similar operating conditions. Simulation results showed that the type-2 fuzzy logic PID controller has better performances than t…

Systematic higher order nonlinear analysis of power systems operating under p…

Abstract In this paper, the modal series method is revisited and an extension on the method to include higher order terms is proposed. This proposal is based on the introduction of the multidimensional Laplace transform and association of variables theorems to deduce the analytical closed-form solution when it is applied to the analysis of a nonlinear power system model. The method is systema…

Single point bearing fault diagnosis using simplified frequency model

Abstract The time synchronous averaging (TSA) is a wellknown technique used for early detection of bearing failure in electrical machines. This method is very efficient if the characteristic default frequency is perfectly known. In this article, a reduced frequency model, derived from ESPRIT algorithm, is used to provide a very accurate estimation of the fault frequency. The precision obtaine…

Simplified model predictive current control without mechanical sensors for va…

Abstract This paper proposes a simplified finite-controlset model predictive current control (FCS-MPCC) without mechanical sensors for permanent-magnet synchronous generators (PMSGs) in variable-speed wind energy conversion systems. The procedure of selecting the best switching vector is optimized by computing the reference voltage vector (VV) directly from the reference current. Subsequently…

Sensorless control of inverter dc-bus voltage combined with modified PQ contr…

Abstract this paper presents a sensorless control approach of inverter dc-bus voltage using extended Kalman Filter (EKF). A positive sequence detection of grid voltage and load current is also proposed. The dc-bus voltage estimated by EKF is combined with the modified instantaneous power (p–q) control technique for photovoltaic system application to improve electrical energy quality at the …

Reliability optimisation for the multi-contact connector system under frettin…

Abstract The harsh operating environments of many electronic systems, such as in the automotive and aerospace applications, make the semi-permanent connector terminal susceptible to intermittent failure or high contact resistance. Fretting, small cyclic movements at the contact interface, is exacerbated by oxidation to cause fretting corrosion, resulting in these types of failures. However, d…

Prony method implementation in distance relays to mitigate the effect of seri…

Abstract This paper characterizes the error in distance relay operation due to the existence of asynchronous frequency components when a fault in a line with series compensation occurs. The distance relay model and the impact of nonfiltered frequency components using the conventional digital filters is presented, an errorwill appear in voltage and current fundamental frequency phasors estimat…

Precise PI speed control of permanent magnet synchronous motor with a simple …

Abstract This paper develops a precise proportional–integral (PI) type control system for repeatable tracking control of a permanent magnet synchronous motor (PMSM) under motor parameter and load torque variations. By adding a very simple learning feedforward term, a conventional PI control system can be enforced to have a perfect tracking performance under model parameter and load torque v…

Power exchange among microgrids using modular-isolated bidirectional DC–DC …

Abstract This paper investigates the operation of a DC microgrid which is connected to a DC distribution network using a modular-isolated bidirectional DC–DC converter. The bidirectional power flowcapability of the proposed modular converter provides the possibility of power exchange between DC microgrid, and DC distribution network contains some microgids. The extendable configuration of t…

Performance of transformer differential relay at different neutral grounding …

Abstract Power transformer protective relay should block the tripping during magnetizing inrush and rapidly should operate the tripping during internal faults. There are a variety of protective relays using different measuring techniques to provide reliable and secure transformer protection. These types of the protective relays include electro-mechanical, solid state, digital and numerical re…

Optimum allocation of FACTS devices under load uncertainty based on penalty f…

Abstract This paper presents genetic algorithm optimization method with a suitable objective function to determine optimum location and rated values of FACTS devices by taking into account changes in the power system load over time. In this study, annual daily load profile is considered as a whole instead of an instant load profile while looking for optimum size and location of FACTS devices.…

Optimizing energy and demand response programs using multi-objective optimiza…

Abstract This paper proposes a new multi-objective dayahead market clearing (DAMC) mechanism with demand response offers, considering realistic voltage-dependent load modeling. This paper presents several objectives such as Social Welfare Maximization including demand response offers (SWM), Load reduction Minimization (PredM), and Load Served Error (LSE) minimization. Energy and demandside r…

Optimal reactive-power dispatch using differential search algorithm

Abstract Optimal reactive-power dispatch (ORPD) is one of the most difficult optimization problems regarding to power-system operation which is heavily related to system stability. To overcome ORPD problem, in general, the total real-power loss is reduced by determining the power-system control parameters, such as generator voltages, tap ratios of tap-changer transformers, and compensated rea…

Optimal C-type filter for harmonics mitigation and resonance damping in indus…

Abstract Single-tuned passive filters offer reasonable mitigation for harmonic distortion at a specific harmonic frequency with a high filtering percentage, but resonance hazards exist. Traditional damped filters offer high-pass filtering for the high-frequency range, but suffer from extra ohmic losses. C-type filters may operate in a manner similar to the tuned filters with lowdamping losses…

New procedure for harmonics estimation based on Hilbert transformation

Abstract The paper suggests a new procedure for the estimation of the parameters (amplitude and phase) for a complex periodic signal, based on the concept of analytic signal (AS). Starting from the supposition that the signal fundamental frequency has been estimated in advance at an independent stage, new analytical relations are derived for fast calculation of the unknown parameters, entail…

Operation of five-phase induction motor after loss of one phase of feeding so…

Abstract The paper deals with the influence of a loss of one phase of a feeding source on the properties of a five-phase induction machine. The attention is paid to the waveforms of the currents in individual stator phases, the increase in torque pulsations and the decrease of speed in emergency operation after the disconnection of a faulty phase of the source. Machines in star, pentagon and …

Optimization of soil moisture sensor placement for a PV-powered drip irrigati…

Abstract The efficiency and installation costs of solarpowered drip irrigation systems depend on not only the efficiencies of the electrical motor, its driver, and the pump, but also the efficient usage of irrigation water. In this study, the initial installation costs and energy consumption of photovoltaic irrigation systems were decreased by obtaining the soil moisture level as a reference …

Neural network based diagnosis of partial discharge defects patterns at XLPE …

Abstract The application of the XLPE cable under DC stress is now being considered as one of the promising tool for enlarging the limited transmission capacity of the traditional electric power cable due to the several technical advantages. Therefore, many research institutes are trying to improve the performance by carrying out experimental investigations related to the reliability of the ca…

Multi-objective optimization of passive filters in industrial power systems

Abstract The formulations employed to the optimization of passive filters can be classified as formulations of a single objective or formulations with multiple objectives. The single-objective formulations normally are devoted to determine the filters of lowest cost that assure the compliance with the power quality standards, while in the multi-objective approaches are added other goals that …

Mathematical reconsideration of number of variables in power flow computation

Abstract It has been conventionally believed that there exist 4n variables P, Q, V, θ for an n-bus system in the power flow computation, while we have 2n power flow equations. In this article, the authors argue that the number of variables in an nbus system is not 4n but 4n−1, hence the power flowsolution can be obtained without specifying the reference angle of the slack bus.We then deliv…

Loss of excitation of SMIB power system equipped with high photovoltaic penet…

Abstract The effect of high photovoltaic (PV) penetration with constant injected voltage on the loss of excitation phenomenon of single machine infinite bus power system with two transmission lines has been investigated. The PV modules are integrated to the power system at the same bus of the synchronous generator via DC–DC buck–boost switch mode converter, three-phase DC–AC switch mode…

Influence of volume effect on electrical discharge initiation in mineral oil …

Abstract This article deals with the problem of electrical discharge initiation in mineral oil in the setup of insulated electrodes. The results of laboratory experimental studies were collated with the results of the numerical calculations of electrical field stress. Both kinds of the research methods were applied to analyze the two model electrode setups immersed in mineral oil: setup with …

Improving the energy efficiency of induction cooking 2

Abstract In the October 2009 issue of this Journal, we introduced a special pot type, which could improve the energy efficiency of induction cooking, make the boiling process faster and the cooking more comfortable. The dissipated power in the new pot was significantly higher than in the traditional ones at any inductor current. In this paper we show another pot type with similar advantages, …

Failure mode and effects analysis of power quality issues and their influence…

Abstract Today electronic devices require a power supply without any variation or disturbance. Nevertheless, electrical variations presented in power lines are more frequent and powerful. The consequences of poor power quality devices. Thus, in this study, an FMEA is presented to know which electrical variation has more effect on the reliability of electronic devices. The analysis was perform…

Experimental investigations of commercial gas discharge tube “Osram St 111�…

Abstract The results of the breakdown time lags obtained by commercial “OSRAM St 111” gas diode are presented. The memory curves for different voltages (for 220, 250 and 300 V) are shown. The analysis of the experimentally obtained distributions (histograms and Laue distributions) for different voltages (for 220, 250 and 300 V) and different relaxation times (from 1 to 1500 ms), as well a…