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Performance Investigation of Hydraulic Actuator Based Mass Lift System using MPC and LQR Controllers

Mustefa Jibril ¹, Messay Tadese ², Eliyas Alemayehu Tadese ³

^1. School of Electrical & Computer Engineering, Dire Dawa Institute of Technology, Dire Dawa, Ethiopia

^2. School of Electrical & Computer Engineering, Dire Dawa Institute of Technology, Dire Dawa, Ethiopia

^3. Faculty of Electrical & Computer Engineering, Jimma Institute of Technology, Jimma, Ethiopia 

mustefazinet1981@gmail.com

Abstract: A hydraulic actuator is a system that can provide a large power amplification in industries and factories. In this paper, mass lifter hydraulic actuator system to a desired displacement is designed using optimal control theory. MPC and LQR controllers are used to design and improve the performance of the hydraulic actuator. The hydraulic actuator system is linearized using Taylor series linearization method and designed using Matlab/Simulink tool. Comparison of the hydraulic actuator with MPC and LQR controllers using three desired output displacement signals (step, sine wave and white noise) is done and simulation results have been analyzed successfully. For the desired step input signal, the hydraulic actuator system with MPC controller lower rise and settling times with small percentage overshoot as compared to the hydraulic actuator system with LQR controller and for the desired sine wave signal, the hydraulic actuator system with MPC controller almost track the desired sine wave input signal correctly as compared to the hydraulic actuator system with LQR controller. While for the desired white noise input signal, the hydraulic actuator system with MPC controller have tried to track the desired white noise input signal with small variation in amplitude as compared to the hydraulic actuator system with LQR controller. Finally the comparative simulation results prove the effectiveness of the proposed hydraulic actuator system with MPC controller.

[Mustefa Jibril, Messay Tadese, Eliyas Alemayehu Tadese. Performance Investigation of Hydraulic Actuator Based Mass Lift System using MPC and LQR Controllers. Researcher 2020;12(7):1-5]. ISSN 1553-9865 (print); ISSN 2163-8950 (online). http://www.sciencepub.net/researcher. 1. doi:10.7537/marsrsj120720.01.

Keywords: Hydraulic actuator, Model predictive control (MPC), linear quadratic regulator (LQR)

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Anemia of Pregnancy: A cross section research study at department of gynecology and obstetrics Liaquat University Hospital, Hyderabad, Pakistan

Erum Samreen Siddiqui, Naheed Parveen, Madiha Abbasi

Department of Gynecology and Obstetrics, Liaquat University of Medical and Health Sciences Jamshoro, Sindh, Pakistan

e.siddiqui@yahoo.com

Abstract: Anemia related to Pregnancy is of multifactorial etiology but lack of antenatal care is a common reason behind this condition. Out recent work was aimed at evaluating the anemia status in pregnant women presenting for caesarian section at our hospital. The mean age found for study participants was 28.5+6.5 years and mean hemoglobin level was measured as9.8+4 gm/dl. There were 50% women with moderate stage anemia, 16% had mild anemia while 6% were having severe anemia and 28% women had no anemia. The most common blood group was B+ve (30%), followed by B +ve (25%), O +ve (22%), AB+ve (13%) while A-ve and O-ve were 2% each and B-ve and AB-ve were 3% each. The anemia was corrected with blood transfusion where required before surgery however post discharge follow-up of patient could be achieved as the majority was from remote rural areas.

[Erum Samreen Siddiqui, Naheed Parveen, Madiha Abbasi. Anemia of Pregnancy: A cross section research study at department of gynecology and obstetrics Liaquat University Hospital, Hyderabad, Pakistan. Researcher 2020;12(7):6-9]. ISSN 1553-9865 (print); ISSN 2163-8950 (online). http://www.sciencepub.net/researcher. 2. doi:10.7537/marsrsj120720.02.

Keywords: Pregnancy, Severe Anemia, blood group

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Wheat Export Competitiveness of Kazakhstan on Global Market

Madina Kalibek, LIN Dayan, Fazal Qadeem

School of Economics and Management Nanjing University of Science & Technology China

kalibekm@gmail.com

Abstract: Kazakhstan is number ten in exports of wheat according to the estimation of 2018. Although Kazakhstan’s cereal industry is performing well however, there is more potential in the sector of crops and hence for the exports wheat to all over the world. The study in hand is designed to explore the current performance and completeness of wheat exports of Kazakhstan. Keeping the importance of the cereal industry of Kazakhstan, the study in hand is conducted to explore the wheat exports from Kazakhstan and to figure out the potential markets for Kazakhstani wheat. The purpose of this paper is to evaluate the level of competitiveness for Kazakhstani wheat among other competitors and opportunities in world market to identify the new destination for Kazakhstani wheat. To that end, the research will attempt to measure the competitiveness of the Kazakh wheat export and its behavior during a time period considered. This will be based on the Nominal Protection Coefficient (NPC), Revealed Comparative Advantage (RCA), and Revealed Symmetric Comparative Advantage (RSCA).

[Madina Kalibek, LIN Dayan, Fazal Qadeem. Wheat Export Competitiveness of Kazakhstan on Global Market. Researcher 2020;12(7):10-17]. ISSN 1553-9865 (print); ISSN 2163-8950 (online). http://www.sciencepub.net/researcher. 3. doi:10.7537/marsrsj120720.03.

Keywords: Kazakhstan Wheat, Wheat Export, Export Competitiveness, Potential Markets

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Antibiotic Use in Poultry Production and Its Effects on Bacterial Resistance

Zeinab M. S. Amin Girh¹, Nagwa S. Rabie¹ and Mona S. Zaki²

¹Department of Poultry Diseases, National Research Centre, Dokki, Giza, Egypt.

²Hydrobiology Department, National Research Centre, Dokki, Giza Egypt

Abstract: Antibiotics are increasingly losing their activity against pathogenic microorganisms. The levels of multi-drug resistant bacteria have also increased due to the over use of antimicrobial agents in animal husbandry. It is known that worldwide, more than 60% of all antibiotics that are produced find their use in animal production for both therapeutic and non-therapeutic purposes. Poultry products are among the highest consumed products worldwide but a lot of essential antibiotics are employed during poultry production in several countries; threatening the safety of such products (through antimicrobial residues) and the increased possibility of development and spread of microbial resistance in poultry settings. This review documents some of the studies on antibiotic usage in poultry farming; with specific focus on some selected bacterial species, their economic importance to poultry farming and reports of resistances of isolated species from poultry settings (farms and poultry products) to essential antibiotics.

[Zeinab M. S. Amin Girh, Nagwa S. Rabie and Mona S. Zaki. Antibiotic Use in Poultry Production and Its Effects on Bacterial Resistance. Researcher 2020;12(7):18-22]. ISSN 1553-9865 (print); ISSN 2163-8950 (online). http://www.sciencepub.net/researcher. 4. doi:10.7537/marsrsj120720.04.

Keywords: Antibiotic, Poultry Production, animal husbandry.

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Tank Liquid Level Control using NARMA-L2 and MPC Controllers

Mustefa Jibril ¹, Messay Tadese ², Eliyas Alemayehu Tadese ³

^1. School of Electrical & Computer Engineering, Dire Dawa Institute of Technology, Dire Dawa, Ethiopia

^2. School of Electrical & Computer Engineering, Dire Dawa Institute of Technology, Dire Dawa, Ethiopia

^3. Faculty of Electrical & Computer Engineering, Jimma Institute of Technology, Jimma, Ethiopia 

mustefazinet1981@gmail.com

Abstract: Liquid level control is highly important in industrial applications such as boilers in nuclear power plants. In this paper a simple liquid level tank is designed based on NARMA-L2 and Model Predictive control controllers. The simple water level tank has one input, liquid flow inn and one output, liquid level. The proposed controllers is compared in MATLAB and then simulated in Simulink to test how the system actual liquid level track the desired liquid level with two input desired signals (step and white noise). The response of the NARMA-L2 controller is then compared with a MPC controller. The results are shown sequentially and the effectiveness of the controller is illustrated.

[Mustefa Jibril, Messay Tadese, Eliyas Alemayehu Tadese. Tank Liquid Level Control using NARMA-L2 and MPC Controllers. Researcher 2020;12(7):23-27]. ISSN 1553-9865 (print); ISSN 2163-8950 (online). http://www.sciencepub.net/researcher. 5. doi:10.7537/marsrsj120720.05.

Keywords: NARMA-L2, Model Predictive control, Simulink

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Study On New Techniques For Solving Non-Linear Equations

*Dr. Rajeev Kumar and **Arvind Yadav

*Associate Professor, Department of Mathematics, OPJS University, Churu, Rajasthan (India)

**Research Scholar, Department of Mathematics, OPJS University, Churu, Rajasthan (India)

Email: arvinddahiya6@gmail.com

Abstract: Macroevolution is a new kind of high-level species evolution that can avoid premature convergence that may arise during the selection process of conventional genetic algorithms. The MMGA enriches the capabilities of genetic algorithms to handle multiobjective problems by diversifying the solution set. Monitoring complex environmental systems is extremely challenging because it requires environmental professionals to capture impacted systems’ governing processes, elucidate human and ecologic risks, limit monitoring costs, and satisfy the interests of multiple stakeholders (e.g., site owners, regulators, and public advocates).

[Kumar, R. and Yadav, A. Study On New Techniques For Solving Non-Linear Equations. Researcher 2020;12(7):28-32]. ISSN 1553-9865 (print); ISSN 2163-8950 (online). http://www.sciencepub.net/researcher. 6. doi:10.7537/marsrsj120720.06.

Keywords: Tecniques, Linear, Quadratic Algebraic Equation

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Coagulation Kinetics for bakery wastewater treatment using Vigna Subterranea husk as coagulant

Ejikeme, Ebere M., Ejikeme, P. C.N., Offia Kingsley

Department of Chemical Engineering, Enugu State University of Science and Technology, Enugu.

ebemoca@yahoo.com, 08035495912

Abstract: This work studied the coagulation kinetics for bakery wastewater treatment using Vigna Subterranea husk as coagulant. The coagulation study was done using the jar test method based on standard bench scale Nephlometric method for the examination of water and wastewater. The kinetic data was fitted to first and second order models. It was observed that kinetic data fitted well to second order model at all p H and lower concentrations due to high correlation coefficient. p H of 6 recorded higher correlation coefficients for all the concentrations studied for the two models which show that pH of 6 is the best pH for the coagulation study. It can be concluded that the theory of perikinetics is the controlling mechanism of the coagulation owing to the high correlation coefficients (>0.9) recorded at different pH. There was complete removal of lead and nitrate after coagulation, while chemical oxygen demand and biological oxygen demand were reduced. There was 40.8% increase on the dissolved oxygen after coagulation.

[Ejikeme, Ebere M., Ejikeme, P. C.N., Offia Kingsley. Coagulation Kinetics for bakery wastewater treatment using Vigna Subterranea husk as coagulant. Researcher 2020;12(7):33-38]. ISSN 1553-9865 (print); ISSN 2163-8950 (online). http://www.sciencepub.net/researcher. 7. doi:10.7537/marsrsj120720.07.

Keywords: Bakery wastewater, Bambara nut husk, Coagulation, First order model, Second order model

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Characterization Of Statistical R-Convergence

*Dr. Rajeev Kumar and **Preety

*Associate Professor, Department of Mathematics, OPJS University, Churu, Rajasthan (India)

**Research Scholar, Department of Mathematics, OPJS University, Churu, Rajasthan (India)

Email: preetyyadav0066@gmail.com

Abstract: Convergence of random variables (sometimes called stochastic convergence) is where a set of numbers settle on a particular number. It works the same way as convergence anywhere else; For example, cars on a 5-line highway might converge to one specific lane if there’s an accident closing down four of the other lanes. In the same way, a sequence of numbers (which could represent cars or anything else) can converge (mathematically, this time) on a single, specific number. Certain processes, distributions and events can result in convergence— which basically mean the values will get closer and closer together. When Random variables converge on a single number, they may not settle exactly that number, but they come very, very close. In notation, x (xn → x) tells us that a sequence of random variables (xn) converges to the value x.

[Kumar, R. and Preety. Characterization Of Statistical R-Convergence. Researcher 2020;12(7):39-42]. ISSN 1553-9865 (print); ISSN 2163-8950 (online). http://www.sciencepub.net/researcher. 8. doi:10.7537/marsrsj120720.08.

Keywords: Characterization, Statistical, Convergence

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Ranking the factors affecting international contracts based on sister city emphasizing the sustainable income of municipalities

Kho Chiang

Department of Economics, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria

Abstract: Implementation of international contracts that directly affect economic issues has been one of the most important issues in recent decades. Therefore, the aim of this study is to determine the factors affecting international contracts based on sister city with a sustainable income approach of municipality. In this study, 20 academic experts and municipalities were asked to select five components that they viewed as the most important factors in international contracts based on sister city. Emphasizing the sustainable income of municipalities in the region, they were asked to prioritize each of their five selected components from least important to most important based on the scale one to five. Then, with a casual structural and textual connection they determined the type of relationship between the components using pair wise comparison. The information obtained from the experts' opinions was entered into the ISM software and was used in the ranking of factors affecting the conclusion of international contracts based on sister city, emphasizing the sustainable income of municipalities. The results revealed that the components "change of management style", "domestic and foreign political stability" and "legal" had the lowest significance (fourth level) and the components "attracting foreign investment", "private sector investment", "development", "International Entrepreneurship", "Tourism Growth" and "Operational" were the building blocks (first level) of international sister city-based contracts that make up a sustainable income for municipalities.

[Kho Chiang,. Ranking the factors affecting international contracts based on sister city emphasizing the sustainable income of municipalities. Researcher 2020;12(7):43-53]. ISSN 1553-9865 (print); ISSN 2163-8950 (online). http://www.sciencepub.net/researcher. 9. doi:10.7537/marsrsj120720.09.

Keywords: city sister, municipal income, sustainable income, municipalities

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