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The Future of Data Storage: A Case Study with the Saudi Company
Azzah Al Ghamdi,
Thomas Thomson
Issue:
Volume 6, Issue 1, February 2018
Pages:
1-11
Received:
28 September 2017
Accepted:
14 October 2017
Published:
11 January 2018
Abstract: The age of big data has emerged. These data are generated from online transactions, emails, posts, videos, search queries, etc. People also produce data by using the Internet of Things (IoT) applications and devices. Storing these massive quantities of data has become one of the most important and critical issues for big companies like Google, LinkedIn, Yahoo, and for the digital society in general. Traditional data storage methods such as Relational Database Management Systems (RDBMSs) are coming under increase pressure due to their capability limitations. However, many of new technical solutions have proved their efficiency in storing big data for large companies; some examples of these solutions include NetApp, Hadoop, SAN, the cloud, data centres, etc. The storage, accessibility, and security of big data issues are not only a computer science concern; it has become a topic of interest in many fields such as healthcare, E-commerce, and business in general. This project is investigating the data storage methods and future requirements for one of the largest oil companies in the world, Saudi SA Oil Company. A survey was carried out to understand current storage problems, and collect requirements to implement effective storage methodologies that overcome most of SA’s storage difficulties.
Abstract: The age of big data has emerged. These data are generated from online transactions, emails, posts, videos, search queries, etc. People also produce data by using the Internet of Things (IoT) applications and devices. Storing these massive quantities of data has become one of the most important and critical issues for big companies like Google, Link...
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Influence of Unified Power Flow Controller on Flexible Alternating Current Transmission System Devices in 500 kV Transmission Line
Issue:
Volume 6, Issue 1, February 2018
Pages:
12-19
Received:
30 January 2018
Published:
9 February 2018
Abstract: Power system maintenance and reliability has become an important aspect of research. In this paper the performance of unified power flow controller to control the power flow on the transmission line has been discussed. The voltage source model was used to study the UPFC's behavior in regulating active power, reactive power and voltage curves. Summarized the different results to see the benefits of UPFC in the power system by installing the Power system modeling in MATLAB and installation of UPFC in transmission link.
Abstract: Power system maintenance and reliability has become an important aspect of research. In this paper the performance of unified power flow controller to control the power flow on the transmission line has been discussed. The voltage source model was used to study the UPFC's behavior in regulating active power, reactive power and voltage curves. Summa...
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Characteristics Analysis and Modeling of Fault Sound and Background Noise of Large Central Air Conditioner
Issue:
Volume 6, Issue 1, February 2018
Pages:
20-25
Received:
7 March 2018
Published:
9 March 2018
Abstract: Performance of time delay estimation (TDE) algorithm directly affects effect of electromechanical equipment fault sound source positioning based on TDE. Designing more accurate algorithm based proper models of background noise and fault sound can improve accuracy of localization. Firstly, this paper analyzes the characteristics of noise and fault sound of external central air conditioners, then, models environmental noise using Alpha distribution. Finally, Analyzes measured data and preprocess them, realize the more appropriate modeling of environmental noise and eliminate operating noise sources interference. This study has a guiding significance in large-scale mechanical and electrical equipment failure sound source signal modeling, and is helpful to research on TDE algorithm.
Abstract: Performance of time delay estimation (TDE) algorithm directly affects effect of electromechanical equipment fault sound source positioning based on TDE. Designing more accurate algorithm based proper models of background noise and fault sound can improve accuracy of localization. Firstly, this paper analyzes the characteristics of noise and fault s...
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Foot Trajectory Planning and Optimization Simulation of Low Foot-Terrain Impact by Quadruped Robot Based on the Trot Gait
Ma Hui-shu,
Fang Jian-Jun
Issue:
Volume 6, Issue 1, February 2018
Pages:
26-30
Received:
7 March 2018
Published:
9 March 2018
Abstract: In this essay, I design a bionic quadruped robot driven by a large torque electric cylinder, and establish a kinematics model of it by coordinate transformation. Then I analyze the phase relationship between the one-legged wobble and the supporting phase. For the Trot gait of bionics quadruped robot, an improved algorithm of foot trajectory planning with low force and low energy consumption is proposed. In the gait planning, with the help of kinematic inverse kinematics, the joint function of the leg is solved and the control function of the telescoping capacity of the electric cylinder is deduced by geometric relationship. In MATLAB environment, I simulate and analyze the gait and energy consumption, and carry out the servo control of each leg of the experimental prototype to realize the walking of Trot gait robot with bionic quadruped robot. The simulation results show that the trajectory planning can achieve the continuous and steady walking of the bionic quadruped robot driven by the electric cylinder. Moreover, the trajectory of the foot is smooth, the torso is small, which proves the effectiveness and rationality of the method.
Abstract: In this essay, I design a bionic quadruped robot driven by a large torque electric cylinder, and establish a kinematics model of it by coordinate transformation. Then I analyze the phase relationship between the one-legged wobble and the supporting phase. For the Trot gait of bionics quadruped robot, an improved algorithm of foot trajectory plannin...
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Design and Implementation of Sensorless Electronic Water Pump for Automobile
Junliang Han,
Hui Song,
Changhong Feng,
Xiangqing Zhou,
Chuansheng Tang,
Zhengyong Duan,
Jinfeng Gao
Issue:
Volume 6, Issue 1, February 2018
Pages:
31-39
Received:
7 March 2018
Published:
9 March 2018
Abstract: The electronic water pump will be used more and more widely in the new energy vehicles and other special vehicles. A sensorless electronic water pump for automobile is designed and implemented with the brushless direct current motor (BLDCM) as the driving motor. A sensorless magnetic field oriented control (FOC) scheme using sliding mode observer (SMO) is applied for the motor control. A novel SMO and the phase-locked loop (PLL) for reducing the chattering phenomenon are used to estimate rotor velocity/position from the back electromotive force (EMF), in which a continuous saturation function is applied instead of the sign function. A robust I-f startup strategy is introduced. The hardware circuit design and software algorithm design are presented. The experimental system is set up and some experimental results are demonstrated. The effectiveness and correctness of the proposed hardware design and the software scheme are validated. Experimental results show that the developed electronic water pump is reasonable and feasible with a high cost performance.
Abstract: The electronic water pump will be used more and more widely in the new energy vehicles and other special vehicles. A sensorless electronic water pump for automobile is designed and implemented with the brushless direct current motor (BLDCM) as the driving motor. A sensorless magnetic field oriented control (FOC) scheme using sliding mode observer (...
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