bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental Study on Reconstruction of Articulated Disk Spectrum Based on LabVIEW
Authors: Zhou XiaoDong , Xing Keli , Yang Jiachen
Published: March 2020

In order to realize the requirements of the down-line test of the articulated disk spectrum produced by an enterprise, this paper designs a set of automatic test system for the articulated disk. The working principle of the system is elaborated. The fuzzy PID algorithm is used to realize the precise control of the angle through the LabVIEW software platform. The CAN bus is used to realize the communication between the test bench and the articulated disk under test. Finally, the reliability of the test system is verified by the actual test, and the final test bench meets the requirements of the company and is accepted successfully.
Analysis of Thrust Vectoring Nozzle with a Secondary Shock Wave Channel
Authors: Li Li , Hu Chunyan , Wang Yanqi , Bi Yundong
Published: March 2020

A two-dimensional fluidic thrust vectoring nozzle with a secondary shock wave channel is designed in this paper. The direct secondary shock wave channel is composed of a front vacuum chamber, a secondary flow chamber, and a rear vacuum chamber. Based on the numerical simulations using a Navier-stokes solver, the structural parameters of the secondary shock wave channel on the nozzle performance are studied.
Potential impact of Poyang Lake Hydraulic Project on hydrodynamicenvironment and fish habitat
Authors: Han Yong
Published: March 2020

The problem of dry water in Poyang Lake has been deteriorating, and the ecological function is declining. Hence, the construction of Poyang Lake Hydraulic Project (PLHP)was proposed. In this study, the potential impact of PLHP on fish was explored by establishing a research framework among hydrodynamics, biological behaviours, spatial distributionand abundance of aquatic organisms. Two scenarios of the current dry water situation and PLHP regulation scheme were simulated, and the variables of water depth, velocity, riverbed surface morphology, habitat area, food resources, movement ability and biological connectivity were discussed. Results show that the effect of PLHP on fish habitat has both positive and negative aspects. For the whole area, the hydraulic project improves the habitat suitability area and food resources of fish, but weakens the migration ability and connectivity with the Yangtze River. The degree of dual influencedepends on the dispatching water level. These results could provide guidancefor the reasonable operation of PLHP and the protection working of fish in Poyang Lake.
In-situ stress measurement at deep position and optimization of roadway support structure parameters in underground mines
Authors: Du Zhenfei
Published: March 2020

In view of the fact that the mining depth is increasing year by year and the ground pressure disaster is becoming more and more serious in a coal mine, the in-situ stress in deep areas was measured by using the stress relief by overcoring method. The confining pressure rate test and the temperature compensation test were carried out in the laboratory. In-situ stress states and its distribution law ware obtained. Appropriate mechanical parameters and support parameters were selected through research on roadway support theory. By adopting numerical simulation software, the primary support and the secondary support of roadway ware numerically simulated and compared, which can offer a scientific, reasonable and economic plan for the secondary support of roadway. After field application, the roadway support effect had been significantly improved.
Study on the Relationship between Maritime Accidents and Bad Weather in Shanghai Coast
Authors: Yun Yu , Xinxin Gao , Shengkang Yao
Published: March 2020

By introducing the concept of daily average accident index, this paper discusses the relationship between maritime accidents and bad weather in Shanghai coast, and puts forward some measures and suggestions to reduce the number of maritime accidents.
Roadway rock pressure appearance law of roof-cutting and pressure-relieving retaining roadway in medium thick seam
Authors: Su Xiashou , Guo Linming
Published: March 2020

Through long-term monitoring of the displacement of the roof and the pressure changes of various supporting methods along the retaining section of No. 9 coal seam in the Dianping coal mine, the mechanical characteristics of the displacement of the roof and various supporting methods were analyzed. It has been found that the top layer of the roadway section has a longer aging effect and a lower value than the roof subsidence. The maximum pressure and average pressure of the side support side of the roadway are slightly lower than the pressure of the left side of the upper roadway. The initial pressure and cycle of the roadway side are slightly higher than the roadway side of the upper roadway. The constant resistance large deformation anchorage is more adaptable to the fluctuation of the roof pressure in a wide range than the door bracket.
Influence of pore width on adsorption capacity of shale-Insights from high pressure adsorption experiments on model substances
Authors: Li Xiaofu , Yuan Kun , Xu Shuang , Zhang Yeyu , Peng Xu , Wang Dongqiang
Published: March 2020

Shale gas has become an important unconventional resource worldwide and adsorbed gas mainly contribute to the initial gas content for shale. In this study, different model substances, including 3Å molecular sieve, 4Å molecular sieve, 5Å molecular sieve and 13X molecular sieve, were conducted by high pressure methane adsorption experiments and the results were analyzed to obtain the effect of pore width on methane adsorption capacity. The results show that methane molecular almost cannot enter the pore of 3Å molecular sieve for adsorption, only adsorption on surface can be occurred, as well as the pore of 4Å molecular can be slightly entered by methane molecular. Whereas, methane molecular can totally enter the pore of 5Å and 13X molecular for adsorption. Meanwhile, at low pressure (less than 1.0MPa), the excess adsorption amount of methane for 13X is slightly greater than that of 5Å molecular sieve. With the increasing of pressure (1-18MPa), the excess adsorption amount of methane for 5Å is greater than that of 13X molecular sieve. In the pressure ranging from 18 to 30MPa, the excess adsorption amount of methane for 13X is greater than that of 5Å molecular sieve.
Technical path analysis of clean and efficient utilization of coal in Shajingzi mining area
Authors: Yu Lan , Yang Qingfeng , Sun Ning , Li Shuang , Jia Qiang , Xiao Jiyuan , Zhang Heng
Published: March 2020

In Shajingzi mining area, the coal quality is very low, and many questions will be faced in the process of exploding the area. First, the author analyzed problems in resource development and utilization, and proposed the paths of clean and efficient utilization of coal, which are clean coal power generation technology (including SC, USC and near zero emission power generation technology), CHP energy saving and emission reduction technology, technical analysis of classification and quality utilization and coal transportation technology by pipeline. The author also analyzed the main characteristics in detail, which are high volatile content, high tar content, rich oil coal-high oil coal, and an ideal raw material for low temperature carbonization, tar hydro treating, semi coke gasification and CO combustion power generation. The author also summaries the advantages and disadvantages of coal transportation technology by pipeline, which is a new and efficient way of utilization. Finally, according to the development strategy of “clean, step-by-step, timely and comprehensive”, the author proposes the comprehensive industrial chain of coal, electricity and chemical industry will be the best path.
Analysis of the ASTER Image Topographic Correction Method in Complex Mountain Areas
Authors: Sun Jiaojiao , Wang Qi , Zheng Jie , Wang Zilong , Guo Yijiang
Published: March 2020

The phenomenon of “anisotropic reflection” caused by gradient and aspect changes in complex mountain areas has large disturbance on the spectral information of ground feature in remote sensing images, which will further affect the inversion of surface information based on the spectral characteristics of ground feature. Topographic correction is an effective means to weaken the topographical effect and improve the inversion accuracy of spectral reflectance of remote sensing images. Ten topographic correction methods, such as Teillet regression, VECA, Cosine, Cosine-B, Cosine-C, Cosine-T, C, SCS, SCS+C and Minnaert, were used to conduct topographic correction of ASTER remote sensing images in the complex mountain areas of Qulong, and visual effects, statistical results and spectral changes of ground features were used to quantitatively evaluate the correction results. The results show that the topographic effect in the study area is weakened to different degrees. Teillet-regression correction model has the best correction effect and the topographic effect is weakened to the maximum extent. VECA, cosine-c, and Minnaert calibration models followed. Teillet-regression model can be used as topographic correction model in complex mountain areas.
Oil spill collection boom of ship based on negative pressure principle
Authors: Yi Anning , Zhang Haomin
Published: March 2020

The oil boom has played an important role in the control of ship oil spills, but the oil spill often spreads fast and the control ability of the oil boom is limited. If the oil spill cannot be absorbed and processed in time, the traditional oil boom is difficult to grow. This work designs a new type of oil spill collection fence based on the principle of negative pressure. The main function of this device is to control the area of oil spill area and recover oil spill in time. The device is a unit system and can be folded, which is convenient for the ship to store the device. The device is mainly composed of a water surface oil spill collector, a new type oil boom, a pressure pump and a ship’s fast oil-water separation device. The oil control part relies on the function design of the traditional oil boom to enable timely control of oil spill on the water surface. The oil spill recovery function is realized by the cooperation of a surface oil spill collector based on the principle of negative pressure and a new type of oil fence. Compared with the traditional ship oil spill treatment, the device studied in this project has the characteristics of timely, fast and recoverable oil spill. It can make a significant contribution to maintaining the balance of the marine ecosystem.
Research on assembly accuracy of vertical launcher based on shape error
Authors: Lei Xiaobo , Duan Jinfeng , He Chaoxun
Published: March 2020

As an important part of the shipborne missile weapon system, the overall assembly accuracy of the shipborne vertical launcher will affect the initial accuracy of the test missile launch to varying degrees. Therefore, it is of great significance to research on the assembly accuracy of the launching device. Aiming at the geometric error characteristics of the contact surfaces between the assemblies in the launching device, this paper uses small displacement spins to represent the geometric error of the contact surfaces, and proposes a method for calculating the fit error based on the contact state. The research results show that this method can determine the contact state of the launcher assembly, and the influence of the shape error distribution of the contact surface on the precision assembly cannot be ignored.
Application of comprehensive method in strengthening of a tall building
Authors: Zhu GuoLiang
Published: March 2020

The concrete strength is low, which has a great influence on the compressive bearing capacity, column axial pressure ratio and column reinforcement. In order to solve such problems, it is often strengthened by increasing the section method. However, the use of increasing section method significantly affects the clearance of the building. So, it is strengthened by comprehensive method, in order to not significantly affect the clearance, that is using the outsourcing steel method and the increasing section method simultaneously. This method combines the advantages of the two most commonly methods, the increasing section method and the outsourcing steel method. The bearing capacity of the strengthened member is greatly improved, which not only reduces the influence of the increasing section method on the clearance, but also reduces the area of the externally-formed steel required. Since the adhesive is not required when pasting the steel, the durability of the strengthened member is improved.
Occupational health and occupational hazard control in coal mines: a comparative study
Authors: Deng Xuexiang , Zhang Yuyuan , Cui Liyuan
Published: March 2020

The occupational health efforts within Y Group are examined after analysis on current occupational health and occupational hazard control among coal mines in and outside China, covering a systematic investigation of dust hazard prevention in B Mine and an analytical research of heat hazard in Z Mine. The paper includes an innovative set of studies on the distributions of coal mine workers subject to different occupational hazards and the types of work among pneumoconiosis victims, the distribution of main heat sources underground and measures against heat hazards, as well as the number of dust-exposed workers per ten thousand tons of raw coal. Our findings will provide useful clues for successful occupational health and occupational hazard control in the coal sector.
Using Teaching Learning Based Optimization to Efficacious and Tuning of UPFC-PODs of Interconnected Systems
Authors: Hasan Zinah S. , Hawas Majli Nema
Published: March 2020

This paper offers a systematic procedure for modelling and simulating a teaching-learning-based optimization (TLBO) technique that exercised with styling power system stabilizer (PSS) and UPFC-controller for 6-bus test system. TLBO is used to find an effective and powerful solution for power system stabilizers (PSS) and the power oscillation damping (POD) controller in power systems. The results show the fast damping oscillations and rapidly reaching the steady state with TLBO compared to other methods such as PI-POD and UPFC individually. The parameters of traditional PI are adjusted using try and error method.
Optimal dual design based on capacitor placement and reconfiguration techniques for loss reduction and voltage enhancement
Authors: Kadom H F , Hussain A N , Al-Jubori W K S
Published: March 2020

Distribution System Reconfiguration (DSR) and Optimal Capacitor Placement (OCP) are the most economical and beneficial techniques that have been used in the Radial Distribution Systems (RDSs) to increase the reduction of losses and to perform a better voltage improvement. The DSR technique is a search process to find the shortest path length between the substation and the loads to achieve a maximum reduction in real losses. The OCP technique is used to compensate the reactive power that is required for the inductive loads, which reduces the active and reactive losses and enhances the voltage for the system buses. The approach of combining these techniques provides more improvement than using them individually. In this paper, four cases are implemented that employs either a single or double approach to identify the design with the best performance. The single approach is either DSR or OCP technique as individual technique, while the double approach is either OCP technique for the reconfigured RDS or reconfiguration for the RDS after the application of OCP technique. The optimal selection of tie switches, size and location of capacitors in the individual and dual approaches are achieved by using Qualified Binary Particle Swarm Optimization (QBPSO) and Modified Grey Wolf Optimization (MGWO) algorithms. The four cases are tested for standard IEEE system 33-bus RDS under different loading conditions. The results show the superior performance of the optimal proposed approaches compared to the literature works. Furthermore, the optimal dual techniques have show more effectiveness for loss reduction and voltage enhancement over their individual techniques.
Improved Efficiency of photovoltaic Module Based on Fuzzy Logic MPPT Technique
Authors: Abd Alhussain H M , Yasin N M
Published: March 2020

In photovoltaic (PV) systems, the maximum power point trackers are very important for increasing their efficiency. Maximum power can be achieved by using different methods such as P&O, INC so that the PV module can operate under different weather conditions and still produces maximum output power. In this paper, a smart method is presented for a maximum power point tracking (MPPT) based on a fuzzy logic control (FLC). The photovoltaic system consists of a solar panel type MXS 60W, DC-DC boost converter, FLC (MPP) tracker and resistive load are analyzed and simulated in MATLAB program. The output voltage of the solar panel is increased by the boost converter and it depends upon the duty cycle (D) of the MOSFET of the boost converter. Any change in the duty cycle is performed through sensing the output power of the solar panel. The controller tracks the maximum power of a solar panel by adjusting the duty cycle of the DC-DC converter switch. The simulation results show that the FLC controller can track the Maximum Power Point in a shorter time with less power oscillation around the MPP as compared to the most widely conventional method known as perturb and observe (P&O). Both techniques have been modeled and simulated in (MATLAB/Simulink).
Unit commitment problem solution using Local Attracting Quantum PSO algorithm
Authors: Ismail Ali A , Hussain Ali N
Published: March 2020

In power systems, the demand is time-varying throughout the day, week and month. For that reason, the generators have to be scheduled optimally to increase the saving in the power system by applying the Unit Commitment (UC) to the power system. UC is the operation of turning the generators ON and OFF to supply the demand power. This paper suggests Local Attracting Quantum Particle Swarm Algorithm (LAQPSO) to solve the unit commitment dilemma in power systems. The local attractor in the LAQPSO algorithm is utilized to obtain the rotation angle direction and magnitude in order to update the quantum angle by the quantum rotation gate. The proposed algorithm is applied to solve the UC problem for a 10-units power system. A comparison with different techniques in the literature was implemented to validate the efficiency and the accuracy of the proposed algorithm. The results show the superior performance of the proposed LAQPSO algorithm to minimize the total cost when compared to the literature works.
Comparison of Fractional Order Proportional Integral and Proportional Integral Controllers for super-lift Luo converter
Authors: Odhafa Thaer A , Abed Issa A , Obed Adel A
Published: March 2020

Today, as a result of the immense applications which are used the ac-dc then step down voltage by using dc-dc converter such as the charger of mobile as well as for using the power produced from wind and solar power plants. The present work recommends the hypothesis and utilization of the fractional order proportional integral (FOPI) controller to manage and control the suggested super-lift Luo converter. Super-lift Luo converter is considered as modern technology converter which has numerous points of interest over different converters which are introduced in the literature. Fractional order proportional integral is contrasted with traditional proportional integral (PI) to demonstrate the capability of this controller to improve the rendering of the super-lift Luo converter. Various determinations for the response have been likewise estimated in this paper. At last, the FOPI is examined with different estimations of λ and the better worth is chosen. Matlab/Simulink R2017a has been utilized as a simulation software for all the results.
Efficient and Low-Cost Arduino based Solar Tracking System
Authors: Awad Sohaib R , Al Jbaar Mamoon A , Abdullah Mohammed A M
Published: March 2020

Sun energy plays an important role as a primary source of energy which can be harvested successfully using solar cells. The solar cell efficiency depends on the location of sun and its light intensity. Hence, solar tracking can be exploited to maximize the efficiency of solar panel. In this work, we developed a novel system of an inexpensive automatic microcontroller-based scaled down solar tracker using Arduino platform. Servo-motor is controlled by an Arduino Mega unit in order to re-orient the solar panel according to the position of sun with the help of light dependent resistors (LDR) and servomotors. A dual-axis solar tracker prototype is designed to maximize the harvested solar energy. Experimental results show that the proposed system performs 25% better than a fixed solar panel under the same conditions.
Improved Positioning of Delivery Quad copter Using GPS - Accelerometer Multimode Controller and Unscented Kalman Filter
Authors: Alawsi Ahmed Abdulmahdi Abdulkareem , Jasim Basil H , Raafat Safanah Mudheher
Published: March 2020

In last area of technology, the quadrotor helicopter became essential equipment of everyday man use. Delivery by quadcopter has increased significantly in the last few years in different private and military fields because of its indispensable features such as autonomous flight, vertical take-off and landing. Most quadcopters used for delivery service utilize GPS signal for its autonomous flight to control itself and follow the desired path to the destination. Despite the prevalence of autonomous flight, it produces many challenges. GPS signal denial is one of the most critical challenges that may occur. GPS signal denial problem leads to affect the quadcopter control and potentially get lost. Many studies have tried to provide a solution toward this issue, yet, most solutions focused on specific applications and terms rather than achieving a general solution. In this paper, a multimode control algorithm is proposed as a solution for GPS signal denied through the autonomous flight. The algorithm consists of two control modes: GPS and accelerometer modes with Unscented Kalman Filter (UKF). The results show that the proposed algorithm is reliable and suitable for various applications of the quadcopter in different environments. The proposed algorithm can keep the quadcopter under control during GPS signal denial period and continue moving toward the desired path.
Using the Robust High Density-surface Electromyography Features for Real-Time Hand Gestures Classification
Authors: Jaber Hanadi A , Rashid Mofeed T , Fortuna L
Published: March 2020

Using High-Density surface Electromyography (HD-sEMG) signals for gesture classification has augmented the spatial information of muscle activity by increasing the density and convergence of the electrodes. In this paper, spatial features are extracted from HD-sEMG data. These features generated by combining HOG features of HD-sEMG map and intensity features calculated from the average of segmented HD-sEMG map which is denoted as (AIH) features. Real-time evaluation was performed for inter-session identification. The simulation of proposed algorithms is achieved by MATLAB; the result of our experiments achieves high accuracy with good performance based on spatial features reached to 99%. The comparison of our results with other research indicates that the proposed algorithms can enhance the performance and accuracy of gestures identification process by SVM classifier. In addition, the results confirm the robustness of the spatial features to the variation of EMG signals over time.
High Voltage Gain Three Coupled Winding DC-DC Interleaved Boost Converter with Arduino Microcontroller for the PV Panel Control
Authors: Faraj Karrar S. , Hussein Jasim F.
Published: March 2020

In many applications, high-step converters are widely used, including powered vehicles, Photovoltaic (PV) systems, continuous power supplies, Gas lighting and fuel cell systems. The most important requirements in the energy conversion process are reliability, quality, maintenance and size reduction. This paper presents an Interleaved Boost Converter (IBC) to raise voltage gain with three coupled winding. This converter consists of three pairs of coupled inductors to collect energy in parallel and release energy to the series load, which provides a much higher output load voltage than the traditional DC-DC boost converter. To validate the performance, an investigation was introduced by means of steady state analysis and operation. The operation modes and mathematical analysis are presented. Arduino UNO microcontroller was used to implement Pulse Width Modulation (PWM) gate drive based on Maximum Power Point Tracking (MPPT). The DC-DC IBC with High Voltage Gain (HVG) produces low voltage stress across switches, low input and output current ripple, and also improves the efficiency. These features made this converter suitable for applications where a high voltage gain is demanded. This converter was tested using Matlab/Simulink to validate the performance in terms of input and output ripples. The results supported the mathematical analysis. The cancelation of the ripple in input and output voltages has significantly detected. The ripple amplitude is reducing in DC-DC HVG IBC comparing with traditional DC-DC boost converter, and the ripple frequency is doubled. This tends to reduce the output filter losses, and size. Also improves the efficiency of the converter.
A comparative study of the impact of FACTS devices on the voltage stability in the power systems
Authors: Mosheer A D , Alanbary Karrar M , AlKafaji M S Sadiq , Alzwghaibi Aya A
Published: March 2020

Over the past few decades, demand for electricity has increased significantly, whereas expansions in power generation and transmission have been severely restricted due to resource constraints and environmental constraints. As a result, most transmission lines were heavily loaded, and efficiency of the power system became a limiting factor for transmitting electrical power. It is considered a major and demanding problem to establish a secure and stable operation of the electricity networks. Because of its significance, the voltage stability of the power systems has received considerable attention from researchers. Therefore, this paper sheds light on a substantial number of the adopted techniques, including STATCOM and SVC devices to achieve this purpose. A case study was deemed to be an IEEE bus-14 device. To simulate this analysis, a MATLAB package has been utilized. The simulation results showed that by using these methods, the voltage stability of the related system is considerably improved.
Modelling and Simulation Speed Control of DC Motor using PSIM
Authors: Al-Sagar Z S , Saleh M S , Mohammed K G , Sameen A Z
Published: March 2020

Speed control DC motor (SCDCM) methods are widely used in power electronic circuits. This paper presents various SCDCM methods such as armature voltage control, the results show when armature voltage increases, the speed of the motor increases and when the armature voltage decreases, the motor speed decreases. However, in field resistance methods, when the field resistance increases the speed increases and when field resistance decreases the speed is reduced. While in feedback control when using feedback SCDCM method, two blocks have been used, the first block includes reference speed of motor and the second block includes the added value of speed to reference speed of motor. Power simulation (PSIM) is used to design and simulate the DC motor speed control circuits.
Effect of Reynold Number and Angle of Attack on the Hydrodynamic Forces Generated from A Bionic Concave Pectoral Fins
Authors: Naser Farah Abbas , Rashid Mofeed Turky
Published: March 2020

The pectoral fin shape, diameter and speed are the three main parameters for our robotic fish design. The influence of geometrical shape of pectoral fin in labriform mode swimming mechanism is evaluated with the aid of CFD method which is considered as a first step before building the complete design prototype. Two concave shape fins were designed precisely, each of them was attached to a servo motor arm which is in turn connected to a servo motor that is sliding on pair of shafts to work as robot straighter. The two servo motors along with their pectoral fins are placed in lm × 0.5m × 0.5m pool. Different number of angles of attack were tested and the results showed the optimum value is 50°. Further analysis based on Reynold number and its effect on the drag coefficient was investigated carefully. The hydrodynamic forces will be increases with the increasing of angle of attack for all Reynold numbers, which will in turn speed up the overall velocity of the body.
Design of a smart control and protection system for three-phase generator using Arduino
Authors: Ali Ahmed J , Ibraheem Ahmed M T , Mahmood Omar Talal
Published: March 2020

Proper monitoring of electrical apparatus that has power consumption is a step towards efficient energy and saving management. Parameters of electrical power system have wide variations during operation of electrical devices. These changes in the parameters required to be measured using accrued meter. This paper presents design and implementation of AC multi-meter based on Arduino for three-phase synchronous generator. This meter measures the values of load current, terminal voltage and the frequency. In addition, it used to detect the abnormal operation of three-phase synchronous generator (overload, under and over voltage, and low and high frequencies). The multi-meter displayed the measured parameters and the protection status of each data directly on LCD, and serial print of the Arduino software program in PC via USB cable. A smart monitoring for these operation conditions designed using a Bluetooth module. Two sensors have been used with multi-meter; current sensor type ACS-712, and ac voltage sensor type ZMPT101b. The frequency has been measured utilizing the ac voltage sensor signal, i.e. it measured without using any external zero crossing detector hardware circuit.
Three-phase Induction Motor SVPWM-FOC Control Based on PLC Matlab Translation Approach
Authors: Awdaa M A , Obed A A , Saleh A L
Published: March 2020

Industries have been moved from conventional control to programmable logic control (PLC). System control, protection and maintenance for 3-induction motor have to be used in safe controlling process rather than human continuous control. This paper simulates a PLC control system for three-phase induction motor through Matlab simulation. The motor is driven by a space vector pulse with modulation (SVPWM), a three-phase voltage source inverter through a PLC controller. PLC control can employ speed and current control besides initiating a protection signal for abnormal current, voltage and temperature. Moreover, it can be used as a helpful tool for continuous monitoring of any quantity corresponding to the controlled motor. To emulate the control program in Matlab/Simulink software, a translation approach is used. It translates the PLC control program into m-file function block. The results reflect a successful PLC translation control through the results of speed, current and torque during load and no-load conditions.
Computer Vision-Based System for Classification and Sorting Color Objects
Authors: Fadhil A T , Abbar K A , Qusay A M
Published: March 2020

Interest in computer vision has grown considerably in industrial applications of robotic arms such as packaging, sorting, and other applications. The real challenge is how to improve the current sorting system based on image processing in the four-points to identify, manipulate, select and sort objects depending on color and geometry. This paper presents a mechatronic sorting system with the application of image processing using a web camera by sensing existing parts and capturing them in real-time, then defining colors and analyzing geometric data. This information is processed for the handling mechanism. A robotic arm has 5 DOF is used in sorting the objects have different geometries (circle, rectangular, and triangle) and a different color (red, green, blue, brown, orange, and cyan). The project deals with an automated material handling system. It aims to classify color objects by color, size, and geometry, which comes on a conveyor belt by selecting and placing the parts in their pre-programmed location. Image processing is applied in EmguCV and visual studio software. An image is a matrix of pixels, image processing is the processes applied on image to convert it into digital form and implement some process on it to improve an image. The Canny edge detection algorithm is used for shape identification in image processing. A microcontroller with computer vision is used to automate the sorting process. Experimental results reveal the effectiveness, high accuracy and low cost of computer vision with a robotic arm in the sorting process according to color and shape.
Investigation and optimization method for wireless AP deployment based indoor network
Authors: Abdulwahid M M , Al-Hakeem M S , Mosleh M F , Abd-alhmeed R A
Published: March 2020

In indoor communication, when handling the design issue for the wireless network, it is very important to select the appropriate wireless Access Point (AP) devices and specify the optimum locations for these devices deployment. In addition, reducing the total number of disseminated devices. In this paper, it has been investigating the network performance on the presidency building of middle technical university and based on AP deployment in the targeted building. Such investigation has been achieved using Wireless InSite software, based on the calculation of the parameters of path loss, and received power. Results obtained show significant variation in network performance and coverage at a different part of the building. As a result, a significant contribution has been proposed in enhancing the network performance, reducing the number of utilized AP devices from 13 to 8 devices. Furthermore, reducing both the total implementation costs and the interference effects inside the building.
Designing LDPC system using prob domain decoder in Xilinx system generator
Authors: Hasan F S , Azeez R M , Mosleh M F
Published: March 2020

Low-Density Parity-Check (LDPC) code represents a type of Forward Error Correction (FEC) codes, it is a very perfect code with the ability to correct the errors and it has a performance in term of Bit Error Rate (BER) close to Shannon limits. As this code has many features like reliability, flexibility in implementation and a facility of adaptation. So it takes place in the current area of 4G and even 5G network communications. In this paper, an efficient and optimum design for LDPC system using prob domain decoder is implemented using a Xilinx system generator to evaluate its performance in terms of BER, its complexity and the time needed. FPGA device Kintex7 (XC7K325T-2FFG900C) is used for the implementation of the proposed model. The results show that by increasing the Signal to Noise Ratio (SNR), the values of the BER will be improved significantly.
Outdoor to Indoor Wireless Propagation Simulation Model for 5G Band Frequencies
Authors: Muttair Karrar Shakir , Shareef Oras A. , Mosleh Mahmood F.
Published: March 2020

This paper analyses the signals propagation characteristics and the most important obstacles that encountered these signals when transmitted from outdoor to indoor (O2I) antennas for the college buildings. These buildings consists of several floors and built in the 3D form according to the real dimensions. In this study, we used measurement analysis and a ray-tracing simulation model approach based on the use of the Wireless InSite (WI) software. The use of different frequencies related to the fifth generation (5G) which are 10, 17, 30 and 60 GHz. According to the results that appeared, it is observed the increase in frequency will lead to an increase in path loss, decrease the received signal strength (RSS). There is an inverse relationship between frequency increase and delay spread and an inverse relationship between frequency increase and received power. In addition, we noticed that there is a direct correlation between frequency increase and path loss, where increasing frequency will increase the path loss, decrease delay spread and received power. Finally, the building’s barriers work on obstructing the direction of the signals path and dispersion of the received signal strength (RSS).
Secure Data Hiding in Coded Image using Arduino Speech Recognition
Authors: Abd-Alwahab S N , Wali M K , Hasan H H
Published: March 2020

The cover medium is used as an envelope to hide inside information. Embedded data may represent a text, image or video to be transferred in the spread media. In this paper, secret information hiding in coded image is exhibited relying upon quantization level and discrete wavelet transform (DWT). Secret data is encrypted and controlled by Arduino speech recognition board in both transmitter ad receiver side to decrypt these secret data. The color image is utilized as a cover image with the discrete wavelet transform it into another form and Absolute Moment Block Truncation Coding (AMBTC) technique is used for embedding the data. The mapping of secret data and image scrambling is depended on the Henon map, while the logistic map is used to encrypt secret data. The proposed method achieved accurate results in peak signal to noise ratio about 34.0524 at average for tested image.
An Improved Artificial Neural Network Design for Face Recognition utilizing Harmony Search Algorithm
Authors: Hussein Maryam Mahmood , Mutlag Ammar Hussein , Shareef Hussain
Published: March 2020

Face recognition has become an interesting field for researchers where it is used in many applications. One of the most common methods of soft computing is named the artificial neural network (ANN) has been suggested to achieve the face recognition process. Nonetheless, the performance of ANN depends on the number of neurons in the hidden layers and the value of the learning rate. These variables are usually defined based on the trial and error method which is time-consuming. Furthermore, in many cases, it is very difficult to find the optimum value for these variables. Hence, to improve the performance of the ANN for the face recognition process, the optimization algorithm is needed to get promising outcomes. Therefore, this paper introduces an improved ANN design for face recognition using a meta-heuristic optimization algorithm. The ANN represents a distributed processing system consists of neurons which are simply connected elements. One of the most popular techniques for pattern recognition called back propagation algorithm (BP) is used to train the ANN (BP-ANN) to achieve the face recognition process. To enhance the face recognition system performance, the ANN has been hybridized with the well-known meta-heuristic optimization algorithm namely harmony search algorithm (HSA). The HSA based on the principle work of musicians to find the best harmonies. This technique is Implemented based on the results of the fitness function evaluation. In this research, the mean squared error (MSE) has been used as a fitness function. The HSA optimizes the ANN such that the face recognition system provides the lowest MSE and thus enhances the performance of the face recognition system. The accuracy of the optimum hybrid system (HSA-ANN) is investigated using the MATLAB environment conducted for 10 persons. The results revealed that the proposed system (HSA-ANN) achieved lower MSE compare with the ANN. Furthermore, the HSA-ANN gives a better face recognition rate than traditional ANN.
Proposed APs Distribution Optimization Algorithm: Aware of Interference (APD-AI)
Authors: Mohammed Rawaa Akram , Salim Omar Nameer Mohammed , Al-Nakkash Aseel H , AlAbdullah Ali A S
Published: March 2020

Indoor networks became the focus of attention of many researchers due to its important role to connect to the wide networks. Many algorithms have been applied or proposed to maximize the coverage of indoor networks. In this paper, a multi-objective algorithm has been introduced to optimize the coverage and maximize the Signal-to-Interference Ratio (SIR) based on Binary Particle Swarm Optimization (BPSO) using Matlab software. It has been applied to the installed network which is consist of four AP with a heterogeneous distribution. It has been evaluated the optimized network and proves its reliability. The results obtained show the flexibility and efficiency of the proposed algorithm which produce an optimal network maximizes the coverage area and enhances the SIR by 9.03 dB.
Design of dual ports coplanar waveguide MIMO system for UWB applications
Authors: Al-Ani Nada M. Khalil , Al-Ani Oras A Shareef , Mosleh Mahmood F , Abd-Alhameed Read A
Published: March 2020

In this research, a compact of four elements of dual ports coplanar wave guide (CPW) ending with T-shape stub are installed each one on a corner of 85×134 mm2 printed circuit board (PCB). Each element is connected through the SMA connector “panel mount jack receptacle-2-hole flange-tap terminal”. A twin of opened circular parasitic rings are installed in front of each T-stub. A large number of try and error are applied to select the optimum geometry dimensions of the proposed paradigm. The result of paradigm show that each element operated with a resonance frequency 6.35 GHz, 7.1 GHz is the operating frequency overall system. Also, by utilizing the twin of opened circular parasitic ring, a good isolation is achieved with -48 dB. The obtained band frequency 1.74 (6.64-8.38) GHz are covered an important part of UWB which may be used at a sub band of 5G. In addition, the size of the prototype is suitable for future smartphone applications
An efficient hand gestures recognition system
Authors: AlSaedi Ahmed Kadem Hamed , AlAsadi Abbas H. Hassin
Published: March 2020

Talking about gestures make us return to the historical beginning of human communication because there is no language completely free of gestures. People cannot communicate without gestures. Any action or movement without gestures is free of real feelings and cannot express the thoughts. The purpose of any hand gesture recognition system is to recognize the hand gesture and used it to transfer a certain meaning or for computer control or/and a device. This paper introduced an efficient system to recognize hand gestures in real-time. Generally, the system is divided into five phases, first to image acquisition, second to pre-processing the image, third for detection and segmentation of the hand region, fourth to features extraction and fifth to count the numbers of fingers for gesture recognition. The system has been coded by Python language, PyAutoGUI library, OS Module of Python and the Open CV library.
Design and Implementation Low Cost of Photovoltaic Monitoring System Network Based on LoRaWAN
Authors: Mnati Mohannad Jabbar , Hammoodi Salman Jasim , Altaie Hayder Tareq Rajab , Al-Youif Shahad , Ibrahim Mohamed N. , Van den Bossche Alex
Published: March 2020

The photovoltaic systems sector is in full renovation continually demanding a new system that allows the user to monitor his project from long distance. One of the systems that is currently being implemented in photovoltaic farms is known as the Internet of Things. Through this system, it is intended that the user can know in the real time the status of his photovoltaic systems panels. This paper presents a new solution based on LoRaWAN technology that allows the user to have the necessary information to achieve high efficient of the photovoltaic systems panels. This system is to design and implement a new measuring circuit for measuring the output voltage and current of the PV panels from long distance by using LoRa Technology. To test the correct functioning of the device, two tests have been carried out. The first one corresponds to an essay in which the maximum distance at which a node can communicate with the gateway is measured. While the second test means measuring the voltage and current output of the photovoltaic panel of the full system. The main advantages of the final circuit can be used to monitor PV panels with low-cost, and to have high-efficiency performance from long distance.
Maize Leaf Images Segmentation Using Color Threshold and K-means Clustering Methods to Identify the Percentage of the Affected Areas
Authors: Abbas Amel H , Mirza Nabeel M , Qassir Samar A , Abbas Layla H
Published: March 2020

Control of diseases affecting plants is very important as it relates to the issue of food security, which is a very serious threat on human life. According to the International Maize and Wheat Improvement Center (CIMMYT), most of the maize diseases are caused by mildew. There are more than fifty different mildew diseases affecting maize. The diseases that infect plants go through different stages of the degree of infection. Therefore, determining the degree of injury helps decision-makers spend money on controlling the disease properly. The common method used to determine the degree of injury is visual examination. It’s known that visual examination leaves a large area for error. It is unable to determine the degree of injury with high accuracy as a percentage for example. In this study, we used two methods of segmentation to determine the injury ratio in maize leaves. The methodology of segmentation depends on the Color Threshold Application (CTA) and K-mean clustering. For comparison between methods of segmentation, different color spaces (RGB, HSV, YCbCr, and L*a*b*) have been used. The results obtained indicate that the color threshold segmentation is more efficient than K-means clustering in terms of determining the injury ratio, especially with HSV color space. While it contrary to the RGB color model because it gives the worst result.
Performance Evaluation of 2G and 3G Networks in the City of Baghdad
Authors: Jabbar Dina Jamal , Al-Nakkash Aseel H. , Al_hummadi Shatha Kadhim
Published: March 2020

Communication networks have evolved dramatically in recent years and for a perfect network, there are several factors to focus on to get the perfect coverage and ideal network. Although the network has been installed, the mobile operators’ company keeps reconfiguring the network parameters to achieve the best performance. Even so, some network parameters can’t be modified (tower length, tower position, etc) but other parameters can always be modified due to results of site survey. Also, ICS Telecom was employed to analyze the network performance in terms of coverage and interference due to different values of power and antenna tilt. In this paper, studied the effect of the antenna tilt on the coverage and amount of power from BS to the user in a particular area in Baghdad is studied and it is found that the change in the inclination angle and power have a significant impact on the solutions of the problem of coverage and interference.

A comparison field measurement data and simulation data in terms of RSS results in acceptable value equals to 3.24 and 7.45 for 3G and 2G respectively.

The performance of the adopted networks is analyses after collecting the data of more than 200 points via two methods: experimentally via drive test and simulation-based on ICS telecom software.