Digital Commons Network^™

Cnn-Based Visual Localization For Autonomous Vehicles Under Different Weather Conditions, Shahad Ghintab, Mohammed Hassan

Engineering and Technology Journal

Autonomous vehicles (AV) are expected to improve, transform, and revolutionize ground transportation. Previous techniques are dependent on localization employing pricey inaccuracy Global Positioning sensor. Furthermore, the performance loss is caused by drifting errors of Simultaneous Localization and Mapping. Regarding categorizing and analyzing texture, cameras are much more accessible and practical. This work contributes to obtaining high accuracy for AV localization and reducing errors in predicted positions. Based on the light, accurate, and robust proposed Convolutional Neural Network (CNN), it will scale down the computational complexity and shorten the training time. Considering various weather and time of day conditions such as …

A Modification Of Shortest Path Algorithm According To Adjustable Weights Based On Dijkstra Algorithm, Luay Jabbar, Eyad Abass, Sundus Hasan

Engineering and Technology Journal

It is possible to represent the road map on the paper and study it using Dijkstra`s algorithm to find the shortest path on the real earth. Dijkstra`s Algorithms are used for calculating the shortest path from source to sink to enable query operations that follow. Dynamic shortest-route techniques are needed to accommodate the modifications within the underlying community topology. Every solution includes figuring out the nodes whose shortest routes could be impacted through the updates and producing a list of affected vertices and their updated shortest pathways. In this work, the advent of the retroactive priority queue information structure makes …

Essais De Montaigne, Michel De Montaigne

Hannah Arendt Marginalia - All

Call#: PQ1642.E6 T44

Paris, La Pleiade, 1950.

Contains underlining and marginal lining

PDF Information: 17 pages - 4.5MB

Review On Virtual Inertia Control Topologies For Improving Frequency Stability Of Microgrid, Raof Idan, Ali Mahdi, Thamir Abdul Wahhab

Engineering and Technology Journal

Renewable energy sources (RESs), such as solar and wind power, offer new technologies for meeting the world's energy requirements. The distributed generator (DG) based on RESs has no rotational mass and damping effects compared to the traditional power system with synchronous generators (SG). However, the increasing penetration level of DG based on RESs causes low inertia, a dampening effect on the dynamic performance of the grid, and stability. A solution to improve the frequency stability of such a system is to provide virtual inertia by using virtual synchronous generators (VSG), which can be created by using short-term energy storage and …

Adaptive Neuro-Fuzzy Voltage Control For Lcl-Filter Grid-Connected Converter, Safa Olwie, Abdulrahim Humod, Fadhil Hasan

Engineering and Technology Journal

Inductance – Capacitance – Inductance (LCL) filter is a very attractive candidate for renewable energy system applications due to its high efficiency. High attenuation of the switching frequency harmonics, small size, low fee, and improving the overall harmonic distortion (THD). This paper presents how voltage is affected by increased loads or voltage sag. Therefore it is necessary to control it with certain controllers. The Adaptive Neuro-Fuzzy Inference System (ANFIS) is used as an intelligent controller, the voltage constraint as training data for ANFIS obtained from PI. The filter works in a good connection between the inverter and the grid and …

Fault Detection And Fault Tolerant Control For Anti-Lock Braking Systems )Abs) Speed Sensors By Using Neural Networks, Ayad Abdulkareem, Abdulrahim Humod, Oday Ahmed

Engineering and Technology Journal

This paper proposed neural networks to continuously provide alternative constructed signals for vehicle and wheel speed sensors utilized for the Anti-Lock Braking System (ABS), which serves as the fault tolerant control method. These alternative constructed signals are used for two purposes. The first is to generate residual signals, and the second is to be adopted instead of isolated faulty signals. The residual signal is generated by extracting the difference between the alternative constructed signals and the corresponding actual signals. These residual signals serve as an indication of fault occurrence and to express that fault severity. Whenever a fault occurrence is …

Performance Evaluation Of Integrated Antennas On Photovoltaic Solar Cells, Ahmed Al-Alawi, Said Al Gheilani, Ahmed Al-Zeidi, Mohammed Bait-Suwailam

Engineering and Technology Journal

The performance of antennas is critical to ensuring reliable wireless communication and robust data transmission. Unfortunately, antennas’ performance gets degraded when loaded with lossy materials. This paper presents the numerical and experimental evaluation of low-profile antennas’ performance when integrated with photovoltaic (PV) solar cells for potential use in smart grid and green power networks. Such integrated antennas can serve as a communication unit and sensors to monitor PV solar cells. For convenience, a microstrip patch antenna was used in this assessment study, where the antenna was designed, numerically simulated, and experimentally tested. After which, it was installed on top of …

A Modified Global Management Controller For A Grid-Connected Pv System With Battery Under Various Power Balance Modes, Diana Obaid, Ali Mahdi, Mohammed Alkafaji

Engineering and Technology Journal

This work presents an Energy Management System (EMS) constructed on dissimilar power balance modes and dynamic grid power to activate a DC-link microgrid with a solar (PV-array) generator and battery storage. In addition, the option of requesting adjustable power from the grid to encounter load demand is also presented.  Based on the availability of solar sources, battery state, and grid power, energy management offers the appropriate references for all modes. Six power balance options are defined based on power supply, storage system, and grid mobility to match the load requirement. The aims are to reduce energy usage and upsurge the …

Reliability Assessment Based On Optimal Dgs Planning In The Distribution Systems, Ali Jaleel, Mohammed Abd

Engineering and Technology Journal

Due to increased load demands, distribution systems suffer from high power losses, low voltage levels, high current, and low reliability. To solve these problems, integrate distributed generator units (DG) into the distribution system. DG units are among the most popular methods of improving distribution system reliability, power losses, and bus voltage improvement through the placement and selection of distributed generator units in an optimal location and size. This work proposed Enhanced Particle Swarm Optimization (EPSO) technology to find the optimum location and size of DG units to reduce power losses, improve bus voltage level, and employed the Transient Electricity Analyzer …

The Structural And Optical Investigation Of Grown Gan Film On Porous Silicon Substrate Prepared By Pld, Haneen Jabar, Makram Fakhri, Mohammed Abdulrazzaq, Subash C. B. Gopinath

Engineering and Technology Journal

The optical properties of a grown gallium nitride (GaN) thin film on a porous silicon (P-Si) substrate was investigated. A Photo-electrochemical etching method was used to synthesize the Psi substrate, and a physical deposition method (pulsed laser deposition) of 1064 nm Q-switch Nd: YAG laser with a vacuum of 10−2 mbar was used to grow a thin layer of GaN on a prepared P-Si substrate. X-Ray diffraction displayed that GaN film has a high crystalline nature at the (002) plane. The photoluminescence of GaN film exhibited ultraviolet PL with a peak wavelength of 374 nm corresponding to GaN material and …

Gaussian Process For Gps Receiver Predictor And Ins Gps Integration, Nawras Ahmed, Sameir Aziez, Ali Khenyab

Engineering and Technology Journal

Global Positioning System (GPS) has become important and necessary in daily life.  It is possible to reach any destination using GPS, which is included in many lands and marine applications.  In this work, GPS was applied to a real navigation boat, integrated with the inertial navigation system (INS) device, and installed on the boat. The navigational devices were linked to the (mission planer) program, through which the results of the navigation process were shown. The system can provide better navigation performance accuracy and reliability due to the integration between GPS and INS. The data extracted from the navigation devices are …

Effect Of Copper Foam Baffles On Thermal Hydraulic Performance For Staggered Arrangement In A Duct, Karrar Fadhala, Ekhlas Fayyadh, Ali Mohammed

Engineering and Technology Journal

Metal foam is a novel material recently utilized in baffles as an alternative to solid baffles for reducing flow resistance. However, copper foam baffles have been suggested in this research to overcome this issue. So, the experimental tests were carried out in a manufactured square channel (250 mm x 250 mm) and heated uniformly at the bottom wall of the test section.Its walls are mounted copper foam baffles at a fixed porosity of 95%.Baffles were fixed alternatively on the top and bottom of the walls in staggered mode between two successive baffles (center to center) and were kept constant at …

The Effect Of Eichhornia Crassipes Biodiesel/Lpg Dual-Fuel On Performance And Emissions In A Single-Cylinder Compression Ignition Engine, Hawraa Mohammed, Mahmoud Mashkour

Engineering and Technology Journal

This study investigates the effects of Eichhornia Crassipes Biodiesel (ECB) with liquefied petroleum gas (LPG) dual-fuel on diesel engine performance and exhaust emissions characteristics. A four-stroke, single-cylinder and water-cooled diesel engine was used. The engine was operated with pure Iraqi diesel (PID) as a reference fuel, 40% ECB-60% PID, and duel fuel mode (DFM) (40% ECB-60% PID-2.4 l/min LPG). The experimental testing was carried out at 1500 rpm constant engine speed, compression ratio 18, and time injection 23° bTDC under various load conditions (25%, 50%, 75%, and 100%) full load. Using a gas analyzer, the engine emissions, including carbon dioxide …

The Effect Of Rectangular Grooves On The Lubrication Mechanism In An Inclined Slider Bearing, Muhannad M.Mrah, Ammar S.Hamid Merza

Engineering and Technology Journal

This research aims to study the effect of rectangular grooves on the lubrication mechanism in an inclined slider bearing. Reynolds' equation was used in the theory part to calculate the pressure gradient in a one-dimensional fluid film. The tilted sliding bearing compared the practical results, where the researcher manufactured and developed the device by adding pressure sensors along with the pad. These sensors will give accurate readings because they will read the pressure directly from the bottom of the pads without manometer tubes. Four pads were manufactured, one without grooves and three with rectangular grooves, varying slot widths (3, 5, …

Experimental Study Convection Heat Transfer Inside The Triangular Duct Filled With Porous Media, Sabah Mahdi, Suhad Rasheed

Engineering and Technology Journal

Convection heat transfer inside an empty triangular channel when filled with porous media heated proportionally with a constant heat flux (1300 W/m²) at the Reynolds number range (3165- 10910) with packed beds has been studied. The present work investigates porous media experimentally. The packed duct has a length (1 m) and (0.1 m) hydraulic diameter packed with porous material made from spherical glass particles of two different diameters (5 mm, and 10 mm). The value of porosity for the channel is (0.468,0.616 and), respectively. This research studies the effect of changing the Reynolds number and porosity on the enhanced heat …

Thermoelectric Generators As A Heat Recovery System For Exhaust Gases Of Vehicles Driving At Low Speeds, A. Al-Janabi, O. Al Salmi, E. Al Subhi, A. Al Hadhrami

Engineering and Technology Journal

To save the environment and utilize the waste heat associated with exhaust gases of internal combustion engines, it is crucial to design an efficient system that can recover this heat loss and convert it into useful energy. This study is devoted to developing, through an experimental approach, a practical technical solution to minimize the waste heat of the exhaust gases and convert it into a source of power for further applications in the vehicle. Six thermoelectric generators (TEG1-1263-4.3) were attached to the exhaust pipe in an arrangement of three connected in parallel and three connected in series. The thermoelectric generators …

Omnidirectional Mobil Robot With Navigation Using Slam, Hiba Najim, Iman Kareem, Wisam Abdul-Lateef

Engineering and Technology Journal

As mobile robots have become widespread in indoor environments with narrow and crowded corridors, such as institutions, the demand for mobile robots has recently increased, especially for service purposes (homes, hospitals, and nursing homes for the elderly). The most important factor of autonomous navigation is the mobile robot's awareness of its surroundings, with the robot's ability to move from one place to another smoothly and safely in terms of avoiding obstacles. In this paper, a mobile robot with multi-directional wheels was designed to work in indoor environments and narrow corridors. SLAM was used to map the environment in which the …

Thermal Performance Of A Counter-Flow Double-Pass Solar Air Heater With The Steady And Pulsating Flow, Nassr Hussein, Sabah Ahmed, Ali Ekaid

Engineering and Technology Journal

The present work studied the influence of pulsating flow as an active method on the thermal performance of a double-pass solar air heater with a tubular solar absorber. A ball valve has been used as a pulse generator mounted at the downstream flow of the solar air heater. The experiments were under indoor conditions with a constant heat flux of 1000 W/m2, and different air mass flow rates ranged from 0.01 to 0.03 kg/s. Moreover, the study covered three pulsation frequencies varied from 1 to 3 Hz. Based on the experimental outcomes, it can be observed that the heat transfer …

Investigation Of Offshore Wind Turbine Structure Deflection Using Experimental Work, Numerical, And Theoretical Approach, Hayder Ali, Hassan M. Alwan, Israa Al-Esbe, Kochneva V

Engineering and Technology Journal

Electrical energy from offshore wind turbines is an important source of clean, renewable energy production. One of the reasons for the low efficiency of wind turbines is the change in the flow angle of attack, denoted by the symbol (α), as a result of the deflection of the structure. The study aims to know the values of the maximum deflection of the proposed structure under the environmental conditions of the Arabian Gulf water area. Our research adopted a novel approach to extracting results; the characteristics of sea waves were extracted from the experimental work after fixing five sea waves, knowing …

Determination Of Draught Requirement Of Single-Furrow Mouldboard Plough In Sandy Loam Soil In Yola, Northeastern Nigeria, Kabri, U.

Engineering and Technology Journal

The draught requirement of a single-furrow animal-drawn mouldboard plough implement was determined on sandy loam soils from June to July 2021 at Modibbo Adama University, Yola. The effect of speeds (0.65, 0.83, and 1.05 ms-1) and depths (8, 13, and 18 cm) upon the draught was investigated. Soil analysis, animal specification, and results of tillage experiments are reported. A pair of oxen weighing 538 kg was used as a power source.  A 1 x 3 x 3 factorial experimental design was arranged in a Randomized Complete Design (RCD) for the study on a test plot of 50 m long x …

Numerical Simulation Of Powering Turbofan Propulsion Aircraft With Electricity, Thomas Onah, Christian Aka, Bethrand Nwankwojike

Engineering and Technology Journal

The gas turbine-based propulsion systems were responsible for the emission of pollutants that damage the ecosphere. Commercial aviation represented a large portion of carbon emissions within the aviation industry, so this study focused on novel aircraft propulsion systems for large commercial aircraft. Electric propulsion was considered to be an alternative to conventional propulsion systems. Therefore, this report analyzed the various electric aircraft concepts within the aerospace industry to see whether they have environmental benefits. A flying wing aircraft was compared to a conventional tube-and-wing aircraft using Computational Fluid Dynamics to determine which aircraft requires more power. The lift forces acting …

Determination Of Impingement Cooling Fluid Temperature-Time Profile For Extracted Tiger-Nut Juice (Cyperus Esculentus) By Lumped Thermal Mass Analysis, Nwankwo, Azubuike, Onah Okechukwu, Egwuagu Onyekachi

Engineering and Technology Journal

Determination of Temperature-Time Profile by the Lumped thermal mass analysis (LTMA) method using Tiger-Nut Juice as the impinging fluid on the cooling system was carried out. With a stationary hot steel plate on a modified run-out table for the top surface controlled the accelerated cooling process. This was evaluated with pipe diameters of 10mm, 15mm, 30mm, 35mm, and 40mm by single jet Tiger-Nut Juice impinging fluid, impingement gaps of 115mm, 125mm, 135mm, 145mm, and 155mm, initial surface temperatures from 450oC – 410oC and at sub-cooled temperatures from 150oC–110oC. The analysis reveals a faster cooling rate for both diameters at an …

Effects Of Magnetic Field On The Performance Of Solar Distillers: A Review Study, Karrar A. Hammoodi, Hayder Dhahad, Wissam H. ِAlawee, Z.M. Omara, Fadl Essa, A.S. Abdullah, M Amro

Engineering and Technology Journal

Due to the rising demand for treated water, the enhancement of potable water yield technologies, such as traditional solar distillers, is a pressing concern. Solar desalination is one of the easiest techniques for producing fresh water from salt water. It has several benefits, not the least. It utilizes free solar energy. Moreover, it is a simple and inexpensive technique compared to other alternatives. They are, nevertheless, relatively inefficient devices. Many studies have been done to boost the daily output of solar stills by using many active strategies to produce a large amount of evaporation and condensation compared to a basic …

Optimization Process Of Double Spots Welding Of High Strength Steel Using In The Automotive Industry, Hayder Khaleel, Ibtihal Mahmood, Fuad Khoshnaw

Engineering and Technology Journal

Resistance Spot Welding (RSW) is one of the most important welding techniques used in the automotive industry because it is an economic process and is suitable for many materials. Many parameters affect the mechanical and microstructural properties of nugget formation and its strength, like welding current, electrode force, and welding time. Therefore, optimizing the RSW process to get the optimum welding parameters is necessary for automobile manufacturing companies. High-strength steel is widely used in the automotive industry because of its superior characteristics such as high strength-weight ratio, ductility, fatigue, and corrosion resistance. This paper presents an optimization process for RSW …

Dynamic Response Analysis Of The Rotor Using The Jeffcott Method And Performance Improvement Using Active Magnetic Bearing, Karrar Tuaib, Qasim Atiyah, Imad Abdulsahib

Engineering and Technology Journal

The most common component of mechanical systems today is rotating machines. In these systems, vibration is caused by rotating components. As a result, to decrease the amplitude of vibrations created by rotating equipment, it’s required to understand the behavior of the system. In this work, the problem of vibrations in conventional bearing systems and the effect of adding active magnetic bearings to rotating machines to reduce the amplitude of vibrations are discussed. In this paper, the vibrations in the rotary bearing system were studied theoretically and analytically by using simulation programs to calculate the natural frequencies and parameters affecting the …

Numerical And Experimental Investigation Of Heat Transfer Enhancement By Hybrid Nanofluid And Twisted Tape, Noor Hamza, Sattar Aljabair

Engineering and Technology Journal

This paper presents an experimental and numerical study to investigate the heat transfer enhancement in a horizontal circular tube using hybrid nanofluid (CuO, Al₂O₃/ distilled water) and fitted with twisted tape (typical twisted tape, with twist ratios (TR=9.2). Under fully developed turbulent flow and uniform heat flux conditions, the studied hybrid nanofluid concentrations are (=0.6, 1.22, and 1.8% by volume). The experimental test rig includes all the required instruments to study the heat transfer enhancement. All the tests were carried out with a Reynolds number range of 3560-8320 and uniform heat flux (13217.5 W/m². The twisted tape, manufactured from polylactic …

Bearings Health Monitoring Based On Frequency-Domain Vibration Signals Analysis, Saja Jawad, Alaa Jaber

Engineering and Technology Journal

Rotating machine health monitoring is critical for system safety, cost savings, and increased reliability. The need for a simple and accurate fault diagnosis method has led to the development of various monitoring techniques. They incorporate vibration, motor’s current signature, and acoustic emission signals analysis in condition monitoring. So, based on using vibration signal analysis, a test rig was built for bearing fault identification. The test rig replicates and investigates various bearing problems, such as those found in the inner and outer races. An accelerometer, type ADXL335, was interfaced to a data acquisition device (DAQ USB-6215) for collecting vibration signals under …

A Comparative Study Between Two Lubrication Nano-Additives (Bi2o3 & Tio2) Based On Vibration Response Analysis, Sarah Jaffar, Wafa Soud, Ihsan Baqer

Engineering and Technology Journal

The purpose of this paper is to present a vibration monitoring analysis of a hydrodynamic journal bearing working with nano-additives lubricants.The vibration response is generated on bearings at various rotational speeds and dynamic load conditions.These bearings were tested experimentally by adding two types of nano additives; Bismuth (3) oxide (Bi2O3), which is considered a green, nontoxic metal, as well as a new additive, and nano Titanium dioxide (TiO2), which is moderately toxic, with SN150 base oil.The performance of additives was studied on the base oil. The comparisons between the two nano-additives Bi2O3 with (1, 2, and 4 wt. %) and …

Study The Performance Of A Novel Desiccant Heat Exchanger, Hind Taresh, Amar Abdul-Zahra, Ahmed Saleh

Engineering and Technology Journal

Conserving energy and reducing emissions has become a global consensus. However, most air conditioning systems are highly energy-consuming, affecting global warming and the ozone layer because they use chlorine and fluorine refrigerating fluids. Evaporative cooling systems are one of the most important environmentally friendly air conditioning systems with low energy consumption. However, their performance is negatively affected by the high humidity of the inlet air. One of the solutions to control the relative humidity of the inlet air is using desiccant material. In this paper, a silica gel-coated heat exchanger was designed and constructed as a dehumidifying unit. The effect …

Numerical Investigation Of Thermal-Hydraulic Performance Of Printed Circuit Heat Exchanger With Different Fin Shape Inserts, Ali Aljelawy, Amer Aldabbagh, Falah Hatem

Engineering and Technology Journal

The printed circuit heat exchanger is one of the most recent important heat exchangers, especially in the nuclear power plant and aerospace applications, due to its very compact geometry and small print foot. This paper presents a 3D numerical investigation of the thermo-hydraulic performance of PCHE with a new non-uniform channel design configuration. The new channel design consists of two different fins and shape inserts: the diamond and biconvex shapes. The influence of two design parameters on the heat exchanger performance was studied and optimized, the longitudinal and transverse pitch length (Pl) and (Pt). Air with constant properties as the …