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Статті в журналах з теми "Sensitivity of optimum control"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 липня 2025

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1

Kajiwara, Itsurou, and Akio Nagamatsu. "Simultaneous optimum design of structure and control systems by sensitivity analysis." Finite Elements in Analysis and Design 14, no. 2-3 (1993): 187–95. http://dx.doi.org/10.1016/0168-874x(93)90019-m.

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2

Jalili, Nader, and Nejat Olgac. "A Sensitivity Study on Optimum Delayed Feedback Vibration Absorber." Journal of Dynamic Systems, Measurement, and Control 122, no. 2 (1998): 314–21. http://dx.doi.org/10.1115/1.482457.

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A sensitivity analysis is presented for a novel tuned vibration absorber. The active tuning of the absorber is achieved using partial state feedback with a controlled time delay. The final structure, which is named Delayed Feedback Vibration Absorber (DFVA), is optimized to yield minimum Mpeak of the primary system involved for a given wide band of excitation frequencies. The optimization is performed over the absorber’s structural properties and the feedback control parameters. An optimal tuning over optimally designed passive absorber is conducted first, and separately a collective optimizat

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3

Craven, B. D. "Optimal control on an infinite domain." ANZIAM Journal 47, no. 2 (2005): 143–53. http://dx.doi.org/10.1017/s1446181100009950.

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AbstractFor an optimal control problem with an infinite time horizon, assuming various terminal state conditions (or none), terminal conditions for the costate are obtained when the state and costate tend to limits with a suitable convergence rate. Under similar hypotheses, the sensitivity of the optimum to small perturbations is analysed, and in particular the stability of the optimum when the infinite horizon is truncated to a large finite horizon. An infinite horizon version of Pontryagin's principle is also obtained. The results apply to various economic models.

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4

KAJIWARA, Itsurou, Tohru INAGAKI, and Akio NAGAMATSU. "Optimum Design of Vibration Control System using Modal Analysis and Sensitivity Analysis." Transactions of the Japan Society of Mechanical Engineers Series C 58, no. 552 (1992): 2365–72. http://dx.doi.org/10.1299/kikaic.58.2365.

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5

Ohsaki, M., and Tsuneyoshi Nakamura. "Optimum design with imperfection sensitivity coefficients for limit point loads." Structural Optimization 8, no. 2-3 (1994): 131–37. http://dx.doi.org/10.1007/bf01743310.

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6

Xue, S. D., J. M. Ko, and Y. L. Xu. "Optimal Performance of the TLCD in Structural Pitching Vibration Control." Journal of Vibration and Control 8, no. 5 (2002): 619–42. http://dx.doi.org/10.1177/1077546029287.

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A detailed optimal parametric study is performed for a tuned liquid column damper (TLCD) in suppressing the pitching vibration of structures. Due to the difficulty of finding analytical solutions for the damped structure, a numerical optimization approach is proposed and applied to the system to find the optimum TLCD parameters. The variations of the optimum control parameter with system parameters are determined and discussed. Using various numerical searching data, a set of practical design formulas for the optimum tuning ratio and optimum head loss coefficient of the TLCD are then derived t

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7

Kajiwara, I., and A. Nagamatsu. "Optimum Design of Optical Pick-Up by Elimination of Resonance Peaks." Journal of Vibration and Acoustics 115, no. 4 (1993): 377–83. http://dx.doi.org/10.1115/1.2930360.

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A method for structural dynamic optimization is proposed using sensitivity analysis of resonance and anti-resonance frequencies. The sensitivity of the anti-resonance frequency is newly defined. An approach for eliminating the resonance peak from the frequency response function (FRF) is proposed using this sensitivity, modifying both the frequencies of this resonance and the neighboring anti-resonance bottom to the same value. The proposed method is applied to determine the optimum thickness of a plate in order to eliminate resonance peaks from its FRF. Effectiveness of this method is verified

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8

Lisowski, Józef. "Sensitivity of transport object control quality for measuring the inaccuracy of state variables." Journal of Automation, Electronics and Electrical Engineering 6, no. 1 (2024): 19–30. http://dx.doi.org/10.24136/jeee.2024.002.

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This work analyzes the sensitivity functions and optimum control of a transport and logistics process model. It explains the fundamental model of controlling safe ship movement as a differential game, and optimizing control algorithms through multi-matrix game and multi-stage positioning game. The sensitivity features for controlling safe ship in actual collision scenario are described in relation to inaccurate information of process position and variations in its varables, based on the determination of computer simulation algorithms in Matlab/Simulink software.

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9

Moita, P. P., J. B. Cardoso, and A. J. Valido. "A Space-Time Finite Element Model for Design and Control Optimization of Nonlinear Dynamic Response." Shock and Vibration 15, no. 3-4 (2008): 307–14. http://dx.doi.org/10.1155/2008/721760.

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A design and control sensitivity analysis and multicriteria optimization formulation is derived for flexible mechanical systems. This formulation is implemented in an optimum design code and it is applied to the nonlinear dynamic response. By extending the spatial domain to the space-time domain and treating the design variables as control variables that do not change with time, the design space is included in the control space. Thus, one can unify in one single formulation the problems of optimum design and optimal control. Structural dimensions as well as lumped damping and stiffness paramet

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10

Busch, Florian A., and Rowan F. Sage. "The sensitivity of photosynthesis to O2and CO2concentration identifies strong Rubisco control above the thermal optimum." New Phytologist 213, no. 3 (2016): 1036–51. http://dx.doi.org/10.1111/nph.14258.

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11

Du, Lin, Manli Wang, Hui Li, Na Li, and Fang Wang. "Identification of CCL20 and LCN2 as Efficient Serological Tools for Detection of Hepatocellular Carcinoma." Disease Markers 2022 (March 10, 2022): 1–7. http://dx.doi.org/10.1155/2022/7758735.

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Objectives. To discover a more powerful diagnostic tool for the detection of hepatocellular carcinoma (HCC). Methods. 16 extracellularly located candidates were selected by analyzing the expression array datasets in GEO. 10 of them were validated in clinical samples by ELISA. Differences of each variable were compared by one-way ANOVA or Kruskal-Wallis test. CCL20 and LCN2 were determined in all samples (HCC, 167; liver cirrhosis, 106; and healthy control, 106) and finally chosen for the construction of the combination model by binary logistic regression. The models were first built using a co

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12

Fonseca, Ijar M., and Peter M. Bainum. "Integrated Structural and Control Optimization." Journal of Vibration and Control 10, no. 10 (2004): 1377–91. http://dx.doi.org/10.1177/1077546304042043.

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This paper focuses on the integrated structural/control optimization of a large space structure with a robot arm subject to the gravity-gradient torque through a semi-analytical approach. It is well known that the computer effort to compute numerically derivatives of the constraints with respect to design variables makes the process expensive and time-consuming. In this sense, a semi-analytical approach may represent a good alternative when optimizing systems that require sensitivity calculations with respect to design parameters. In this study, constraints from the structure and control disci

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13

Baldomir, Aitor, Santiago Hernandez, Jacobo Diaz, and Arturo Fontan. "Sensitivity analysis of optimum solutions by updating active constraints: application in aircraft structural design." Structural and Multidisciplinary Optimization 44, no. 6 (2011): 797–814. http://dx.doi.org/10.1007/s00158-011-0665-4.

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14

Rois, Muhammad Abdurrahman, Fatmawati, and Cicik Alfiniyah. "Optimal Control of COVID-19 Model with Partial Comorbid Subpopulations and Two Isolation Treatments in Indonesia." European Journal of Pure and Applied Mathematics 16, no. 1 (2023): 523–37. http://dx.doi.org/10.29020/nybg.ejpam.v16i1.4666.

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We applied sensitivity analysis and optimum control to the COVID-19 model in this research. In addition, the basic reproduction number calculated as 1.57 indicates that this illness is widespread across Indonesia. The most important factor in this model is the contact rate with infected people, with or without comorbidity. Optimal control will minimize the number of infected populations without and with comorbidity, and costs. Numerical experiments will be carried out to describe and compare the graphical models of the spread of COVID-19 with and without controls. From the numerical results an

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15

Zhang, Chun Yu, Zhen Qing Wang, and Mu Qiao. "An Optimization Analysis of Prestressed Space Grid Structures Based on System Reliability." Advanced Materials Research 97-101 (March 2010): 3294–98. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.3294.

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The system reliability of prestressed space grid structures were using as control parameters. Branch-bound method was used to determine main failure modes. The reliability of system was calculated by PNET method. Improved genetic algorithm was used in the minimum weight optimum design of the structure system under reliability constraint. Using this method, the complex sensitivity analysis of structural systems could be avoided and made optimum design of the structure system easy. The result of an example showed that the effectiveness of the method.

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16

Matsumoto, Yuna, Manami Kanamaru, Phan Xuan Tan, and Eiji Kamioka. "Clarifying Optimum Setting Temperatures for In-Flight Personal Air Conditioning System Considering Individual Thermal Sensitivity Characteristics." Electronics 12, no. 2 (2023): 371. http://dx.doi.org/10.3390/electronics12020371.

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The number of people who use airplanes has increased year by year. However, most passengers have a feeling of discomfort during a long-distance flight. One of the factors is the lack of temperature control in the cabin. If air conditioning control can be adjusted to each passenger’s thermal sensation, the whole comfort in the cabin would be improved. Therefore, a personal air conditioning control method is required for airplanes. In order to implement personal air conditioning adapted to individual thermal sensation, this study proposes a seat-type air conditioning system that adjusts the temp

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17

DONG, BO, XIAOFENG LU, ZHENYU LI, et al. "EFFECT OF THE THICKNESS OF PAN/Au MODIFIED ELECTRODE ON BIOSENSOR SENSITIVITY." Functional Materials Letters 05, no. 03 (2012): 1250035. http://dx.doi.org/10.1142/s179360471250035x.

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A simple electrospinning method was used to control the thickness of polyacrylonitrile (PAN)/Au modified electrode. The influence of membrane thickness to modified electrode sensitivity was discussed. In our experiment, a 20-min electrospinning time and a mass ratio of 3:1 PAN/ HAuCl4 are the optimum parameters to generate the high performance PAN/Au membrane modified electrode for detecting H 2 O 2 which has a sensitivity of 145.63 mA M-1 cm-2) and a wide linear range of 20 μM–20 mM.

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18

Ramandeep, Singh*1 &. Somit Dheer2. "FUZZY LOGIC POWER SYSTEM STABILIZER FOR IMPROVEMENT OF DYNAMIC PERFORMANCE OF MACHINE." GLOBAL JOURNAL OF ENGINEERING SCIENCE AND RESEARCHES 4, no. 4 (2018): 80–86. https://doi.org/10.5281/zenodo.1143959.

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Small signal stability is the ability of the power system to maintain synchronism under small perturbations. The small signal dynamic stability of electric power system has been the subject of major theoretical and practical interest and it continue to grow in importance as the control requirements of the power plants become more sophisticated and demanding torque. The range of 0.2 to 2.5 Hz. the damping characteristics of synchronous machine’s rotor oscillations is a function of system structures, operating condition and control structures. The power system stabilizers are widely used t

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19

Mehrabi, Pouria, Justin Hui, Sajjad Janfaza, et al. "Fabrication of SnO2 Composite Nanofiber-Based Gas Sensor Using the Electrospinning Method for Tetrahydrocannabinol (THC) Detection." Micromachines 11, no. 2 (2020): 190. http://dx.doi.org/10.3390/mi11020190.

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This paper presents the development of a metal oxide semiconductor (MOS) sensor for the detection of volatile organic compounds (VOCs) which are of great importance in many applications involving either control of hazardous chemicals or noninvasive diagnosis. In this study, the sensor is fabricated based on tin dioxide (SnO2) and poly(ethylene oxide) (PEO) using electrospinning. The sensitivity of the proposed sensor is further improved by calcination and gold doping. The gold doping of composite nanofibers is achieved using sputtering, and the calcination is performed using a high-temperature

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20

Kumar, R. Prem, G. S. Mahapatra, and P. K. Santra. "Dynamical analysis of SARS-CoV-2-Dengue co-infection mathematical model with optimum control and sensitivity analyses." Nonlinear Analysis: Real World Applications 80 (December 2024): 104175. http://dx.doi.org/10.1016/j.nonrwa.2024.104175.

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21

Badhwar, Shruti, and K. S. Narayan. "Optimum Design of Organic Electrochemical Type Transistors for Applications in Biochemical Sensing." Journal of Sensors 2008 (2008): 1–5. http://dx.doi.org/10.1155/2008/702161.

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This paper addresses the issue of optimizing various performance parameters involved in the design of organic electrochemical type transistors based on the conducting polymer, poly (3,4-ethylenedioxythiophene): poly(styrene sulfonate)(PEDOT:PSS) for applications in biochemical sensing. We report the effect of device contact geometry, gate to channel length ratio “Lg/L,” and analyte distance from the source electrode “x,” on the device sensitivity and response time.

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22

de Sanctis, Massimo, Gianfranco Lovicu, Randa Ishak, Maria Richetta, and Alessandra Varone. "Novel Methodology for the Selection, Dosing and On-Line Control of Corrosion Inhibitors for Industrial Acid Pickling." Materials Science Forum 941 (December 2018): 1698–704. http://dx.doi.org/10.4028/www.scientific.net/msf.941.1698.

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A novel methodology based on electrochemical hydrogen permeation tests is proposed to study the efficiency of commercial inhibitors for industrial acid pickling of iron and mild steels. Weight loss measurements and hydrogen permeation tests have been carried out in order to compare the sensitivity of different techniques to variations of low inhibitor dosages. It has been found a close dependence between low amounts of filming inhibitors and hydrogen uptake in the metallic surface with related permeation currents. The high sensitivity of permeation currents may be very useful to establish and

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23

Heineken, Wolfram, Marc Richter, and Torsten Birth-Reichert. "Energy-Efficient Train Driving Based on Optimal Control Theory." Energies 16, no. 18 (2023): 6712. http://dx.doi.org/10.3390/en16186712.

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Efficient train driving plays a vital role in reducing the overall energy consumption in the railway sector. An energy minimising control strategy can be computed using the framework given by optimal control theory; in particular, the Pontryagin maximum principle can be used. Our optimisation approach is based on an algorithm presented by Khmelnitsky that considers electric trains equipped with regenerative braking. A derivation of Khmelnitsky’s theory from a more general formulation of the maximum principle is given in this article, and a complete list of switching cases between different dri

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24

Uray, Esra, Serdar Carbas, Zong Woo Geem, and Sanghun Kim. "Parameters Optimization of Taguchi Method Integrated Hybrid Harmony Search Algorithm for Engineering Design Problems." Mathematics 10, no. 3 (2022): 327. http://dx.doi.org/10.3390/math10030327.

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Performance of convergence to the optimum value is not completely a known process due to characteristics of the considered design problem and floating values of optimization algorithm control parameters. However, increasing robustness and effectiveness of an optimization algorithm may be possible statistically by estimating proper algorithm parameters values. Not only the algorithm which utilizes these estimated-proper algorithm parameter values may enable to find the best fitness in a shorter time, but also it may supply the optimum searching process with a pragmatical manner. This study focu

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25

Iori, Jenna, Carlo Luigi Bottasso, and Michael Kenneth McWilliam. "A sensitivity-based estimation method for investigating control co-design relevance." Wind Energy Science 9, no. 6 (2024): 1289–304. http://dx.doi.org/10.5194/wes-9-1289-2024.

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Abstract. Control co-design is a promising approach for wind turbine design due to the importance of the controller in power production, stability, load alleviation, and the resulting coupled effects on the sizing of the turbine components. However, the high computational effort required to solve optimization problems with added control design variables is a major obstacle to quantifying the benefit of this approach. In this work, we propose a methodology to identify if a design problem can benefit from control co-design. The estimation method, based on post-optimum sensitivity analysis, quant

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26

Odriozola, Juan, Sergio Beltrán, Montse Dalmau, et al. "Model-based methodology for the design of optimal control strategies in MBR plants." Water Science and Technology 75, no. 11 (2017): 2546–53. http://dx.doi.org/10.2166/wst.2017.135.

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This paper proposes a model-based methodology that allows synthesising the most appropriate strategies for optimising the operation of wastewater treatment plants (WWTPs). The methodology is applied with the aim of maximising the nitrogen removal in membrane bioreactors (MBRs). The proposed procedure is based on a systematic approach composed of four steps. First, a sensitivity analysis of the input variables is carried out in order to obtain a first assessment of the potential for operational improvements. Then, the optimum input variable values are calculated by a model-based optimisation al

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27

Bizon, Nicu, Alin Gheorghita Mazare, Laurentiu Mihai Ionescu, et al. "Better Fuel Economy by Optimizing Airflow of the Fuel Cell Hybrid Power Systems Using Fuel Flow-Based Load-Following Control." Energies 12, no. 14 (2019): 2792. http://dx.doi.org/10.3390/en12142792.

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In this paper, the results of the sensitivity analysis applied to a fuel cell hybrid power system using a fuel economy strategy is analyzed in order to select the best values of the parameters involved in fuel consumption optimization. The fuel economy strategy uses the fuel and air flow rates to efficiently operate the proton-exchange membrane (PEM) fuel cell (FC) system based on the load-following control and the global extremum seeking (GES) algorithm. The load-following control will ensure the charge-sustained mode for the batteries’ stack, improving its lifetime. The optimization function

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28

Liu, Wei Wei, Dong Fang Wang, Feng Li, Hao Chen, Cheng Zhou Wang, and Jun Xue Ren. "Research on Milling Parameters Optimization Based on Surface Residual Stress for Aviation Stainless Steel." Applied Mechanics and Materials 526 (February 2014): 3–8. http://dx.doi.org/10.4028/www.scientific.net/amm.526.3.

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In order to control surface residual stress in milling aviation stainless steel, orthogonal experiments were conducted to investigate the effects of milling parameters on surface residual stress in milling of 1Cr11Ni2W2MoV. The empirical formula of surface residual stress was established to analyze the sensitivity of surface residual stress on milling parameters. The milling parameters stability region and instability region were acquired. Using the extreme difference analysis method, the optimum selection of the milling parameters interval was proceeded. The results show that residual stress

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29

Martins, Alberto M. B., Luís M. C. Simões, João H. J. O. Negrão, and Adelino V. Lopes. "Sensitivity analysis and optimum design of reinforced concrete frames according to Eurocode 2." Engineering Optimization 52, no. 12 (2019): 2011–32. http://dx.doi.org/10.1080/0305215x.2019.1693554.

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30

Anike, Uchenna, Chinenye Augustine Ajibo, Ifeanyi Maryrose Chinaeke-Ogbuka, Chinedu Matthew Odo, Amobi Douglas Amoke, and Cosmas Ani. "An optimum dynamic priority-based call admission control scheme for universal mobile telecommunications system." TELKOMNIKA Telecommunication, Computing, Electronics and Control 18, no. 2 (2020): 603–12. https://doi.org/10.12928/TELKOMNIKA.v18i2. 13900.

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The dynamism associated with quality of service (QoS) requirement for traffic emanating from smarter end users devices founded on the internet of things (IoTs) drive, places a huge demand on modern telecommunication infrastructure. Most telecom networks, currently utilize robust call admission control (CAC) policies to ameliorate this challenge. However, the need for smarter CAC has becomes imperative owing to the sensitivity of traffic currently being supported. In this work, we developed a prioritized CAC algorithm for third Generation (3G) wireless cellular network. Based on the dynamic pri

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31

Wang, Bolin, Mingang Zhai, Xiaofei Yao, et al. "Printable and Mechanical Performance of 3D Printed Concrete Employing Multiple Industrial Wastes." Buildings 12, no. 3 (2022): 374. http://dx.doi.org/10.3390/buildings12030374.

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Three-dimensional concrete printing is a promising technology and attracts the significant attention of research and industry. However, printable and mechanical capacities are required for 3D printable cementitious materials. Moreover, the quantitative analysis methods of printable performance are limited and have low sensitivity. In this study, the orthogonal experiment through samples combining 3D concrete printing method with fly ash, silica fume, and ground granulated blast furnace slag was designed to obtain the printable and mechanical property influence of various mix proportions. Furth

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32

Liu, Yanwen, and Hongzhou Jiang. "Optimum Curvature Characteristics of Body/Caudal Fin Locomotion." Journal of Marine Science and Engineering 9, no. 5 (2021): 537. http://dx.doi.org/10.3390/jmse9050537.

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Fish propelled by body and/or caudal fin (BCF) locomotion can achieve high-efficiency and high-speed swimming performance, by changing their body motion to interact with external fluids. This flexural body motion can be prescribed through its curvature profile. This work indicates that when the fish swims with high efficiency, the curvature amplitude reaches a maximum at the caudal peduncle. In the case of high-speed swimming, the curvature amplitude shows three maxima on the entire body length. It is also demonstrated that, when the Reynolds number is in the range of 104–106, the swimming spe

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33

Mahadik, S. C., V. R. Deulgaonkar, D. N. Washimkar, S. H. Sarje, S. M. Bhosle, and S. Vetal. "Investigation of Optimum Geometry for Robotics Torque Sensor." AFRICAN JOURNAL OF APPLIED RESEARCH 11, no. 1 (2025): 423–38. https://doi.org/10.26437/ajar.v11i1.861.

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Анотація:

Purpose: This study aims to optimise the geometry of joint torque sensors to enhance sensitivity and precision while minimising stress. Design/Methodology/Approach: The research involves designing and evaluating three-ring geometries (Ring A, Ring B, and Ring C) under varying rib angles (30°, 45°, 60°, and 90°) using Finite Element Analysis (FEA) in ANSYS. Experimental validation was performed on the geometry with the highest stress (Ring C, 60° rib angle), utilising strain gauges for stress measurement. Findings: FEA revealed that Ring A and B geometries exhibited lower stress levels, with Ri

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34

Lindquist, John L., Bruce D. Maxwell, Douglas D. Buhler, and Jeffrey L. Gunsolus. "Modeling the Population Dynamics and Economics of Velvetleaf (Abutilon theophrasti) Control in a Corn (Zea mays)-Soybean (Glycine max) Rotation." Weed Science 43, no. 2 (1995): 269–75. http://dx.doi.org/10.1017/s0043174500081169.

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A simulation model was developed to predict the population dynamics and economics of velvetleaf control in a corn-soybean rotation. Data compiled from the literature were used to parameterize the model for two situations, one in which velvetleaf was infected by aVerticilliumspp. wilt and one without infection.Verticilliumwas assumed to have no effect on corn or soybean yield. In the absence of control, simulated seedbank densities of aVerticillium-infected velvetleaf population were 5 to 50 times lower than for an uninfected velvetleaf population. The model was used to evaluate a threshold wee

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35

Nag, Meetu, Bhanu Pratap, and Ajay Kumar. "Multi objective design optimization of graphene piezoresistive MEMS pressure sensor using design of experiment." International Journal for Simulation and Multidisciplinary Design Optimization 13 (2022): 27. http://dx.doi.org/10.1051/smdo/2022018.

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This paper investigates the effect of diaphragm thickness, dimensions of piezoresistors, doping profile and temperature compatibility on sensitivity and non-linearity of graphene MEMS pressure sensor. Taguchi method is used for maximizing the sensitivity and minimizing the nonlinearity of the designed pressure sensor. L27 orthogonal array is utilized for five input factors with three levels. Output voltage is obtained from simulation in COMSOL for different combinations of the input parameters as per L27 orthogonal array. It was found that diaphragm thickness and length of the sensing element

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36

Precup, Radu-Emil, and Stefan Preitl. "Control solutions in mechatronics systems." Facta universitatis - series: Electronics and Energetics 18, no. 3 (2005): 379–94. http://dx.doi.org/10.2298/fuee0503379p.

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This paper presents control solutions dedicated to a class of controlled plants widely used in mechatronics systems, characterized by simplified mathematical models of second-order and third-order plus integral type. The conventional control solution is focused on the Extended Symmetrical Optimum method proposed by the authors in 1996. There are proposed six fuzzy control solutions employing PI-fuzzy controllers. These solutions are based on the approximate equivalence in certain conditions between fuzzy control systems and linear ones, on the application of the modal equivalence principle, an

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Sadati, S. M. Hadi, M. Borgheinejad, H. Fooladi, M. Naraghi, and A. R. Ohadi. "Optimum Design, Manufacturing and Experiment of a Passive Walking Biped: Effects of Structural Parameters on Efficiency, Stability and Robustness on Uneven Trains." Applied Mechanics and Materials 307 (February 2013): 107–11. http://dx.doi.org/10.4028/www.scientific.net/amm.307.107.

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Passive walkers perform a walking like stable limit cycle on small slopes without any external control. In this research, a deployed model of biped that can be built has been considered, and then its walking performance sensitivity such as efficiency, stability and robustness on uneven trains due to variation of structural parameters and their optimum limits have been investigated. It was shown that the foot arc radius and center of mass height have the most important effect on walking performance. After doing simulations in MSC.ADAMS software, an optimum design trend has been suggested. At th

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Ahmed, Heba A., Ahmed M. Maklad, and Ashraf Elyamany. "Role of IL27 and IL35 as biomarkers and potential targets in acute myeloid leukemia." Journal of Clinical Oncology 37, no. 15_suppl (2019): e18516-e18516. http://dx.doi.org/10.1200/jco.2019.37.15_suppl.e18516.

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e18516 Background: Acute myeloid leukemia (AML) is one of the most common leukemia affecting adult. Regulatory T cells (Tregs) are a subset of CD4 (+) T cells that plays a central role immune tolerance. Objective: We aimed to explore the role of interleukin- 27 (IL27) & interleukin- 35 (IL35) produced by T regs and its associations with clinical characteristics and prognostic markers of AML patients. Methods: The study included 70 patients with acute myeloid leukemia (AML) and 30 healthy controls. We used flowcytometry immunophenotyping to confirm the diagnosis of AML. Serum level of inter

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Parida, Adikanda, and Manish Paul. "Optimum active power tracking based control of brushless doubly-fed reluctance generator tied to renewable microgrid." International Journal of Power Electronics and Drive Systems (IJPEDS) 15, no. 1 (2024): 422. http://dx.doi.org/10.11591/ijpeds.v15.i1.pp422-430.

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Among all the existing wind energy generators (WEG), a brushless doubly-fed reluctance generator (BDFRG) is the better option in terms of maintenance cost and constructional simplicity. For more adaptability, the efficiency of the BDFRG can be improved through proper control mechanisms. Therefore, this paper presents an optimum active power tracking-based control technique for BDFRG for minimum losses. Copper loss of the machine is considered to be the objective function for the proposed optimization technique. However, one issue found to be the major in all the existing controllers is the acc

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Gunawan, S., and S. Azarm. "A Feasibility Robust Optimization Method Using Sensitivity Region Concept." Journal of Mechanical Design 127, no. 5 (2004): 858–65. http://dx.doi.org/10.1115/1.1903000.

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We present a robust optimization method that ensures feasibility of an optimized design when there are uncontrollable variations in design parameters. This method is developed based on the notion of a sensitivity region, which is a measure of how far a feasible design is from the boundary of a feasible domain in the parameter variation space. In this method, as the design moves further inside the feasible domain, and thus becoming more feasibly robust, the sensitivity region becomes larger. Our method is not sampling based so it does not require a presumed probability distribution as input and

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Panozzo, Silvia, Alberto Collavo, and Maurizio Sattin. "Sensitivity Analysis of Italian Lolium spp. to Glyphosate in Agricultural Environments." Plants 9, no. 2 (2020): 165. http://dx.doi.org/10.3390/plants9020165.

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Empirical observations generally indicate a shifting and decreased Lolium spp. susceptibility to glyphosate in Italy. This is likely due to the long history of glyphosate use and to the sub-lethal doses commonly used. There is, therefore, a need to determine the variability of response of Lolium spp. to glyphosate and identify the optimum field dose. To perform a sensitivity analysis on Lolium spp. populations in an agriculture area, collection sites were mainly chosen where glyphosate had not been applied intensely. Known glyphosate-resistant or in-shifting populations were included. Two outd

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Nguyen, Tan Tai, Nguyen Van Sau, Quang Minh Ngo, Gauthier Eppe, Ngoc Quyen Tran, and Nguyen Thi Phuong Anh. "Enhanced Sensitivity and Detection of Near-Infrared Refractive Index Sensor with Plasmonic Multilayers." Sensors 21, no. 21 (2021): 7056. http://dx.doi.org/10.3390/s21217056.

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In this work, the multilayer of the surface plasmon resonance (SPR) sensor was optimized to achieve the maximum sensor sensitivity. By optimizing the thickness of the silver layer (Ag) and dielectric films (TiO2 and AlAs), the optimum sensitivity of the SPR sensor could be obtained. The performance of the SPR sensor proposed was compared with control simulations utilizing zinc oxide (ZnO) and molybdenum oxide (MoO3). The numerical results indicate that the figure-of-merits (FOM) of the SPR sensor was achieved around 150/RIU, corresponding to the sensor sensitivity of 162.79°/RIU with the optim

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Ozkaymak, Mehmet, Selcuk Selimli, Durmus Kaya, Esref Yilmaz, Abdulsamed Tabak, and Mehmet Volkan Aksay. "The effect of thermal camera and pyrometer usage in industrial tempering furnaces on optimum combustion performance." World Journal of Engineering 12, no. 4 (2015): 391–98. http://dx.doi.org/10.1260/1708-5284.12.4.391.

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The decrease of energy sources, the increase of energy need and energy costs, competitive conditions in industry and environmental sensitivity require the effective usage of energy sources. In this study, optimum combustion study by using thermal camera and pyrometer in the correct heat furnace of an industry plant for the effective usage of energy in industry. For this reason, in tempering furnace of a milling roll workshop, in order to control the efficiency of tempering, detect the flame length and color and control the homogeneous tempering, 4 thermal cameras and 4 pyrometers have been ass

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44

Ceranic, B., and C. Fryer. "Sensitivity analysis and optimum design curves for the minimum cost design of singly and doubly reinforced concrete beams." Structural and Multidisciplinary Optimization 20, no. 4 (2000): 260–68. http://dx.doi.org/10.1007/s001580050156.

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Khosravifard, A., MR Hematiyan, and L. Marin. "Determination of optimum cooling conditions for continuous casting by a meshless method." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227, no. 5 (2012): 1022–35. http://dx.doi.org/10.1177/0954406212457325.

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An inverse technique based methodology for the optimal control of the solidification front motion in the continuous casting of pure metals with temperature-dependent material properties is proposed. In this method, to achieve specific mechanical and metallurgical properties of the final product, a predefined motion of the solidification front is selected. A history of the heat flux on the fixed boundaries of the problem is then computed, which would result in an actual motion of the solidification front representing the best match for the desired one. A sensitivity analysis of the inverse prob

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Hu, Shaofeng, Lihua Wang, Yishan Lou, Yanfeng Cao, Wenbo Meng, and Lei Zhang. "Laboratory Investigation on Optimum Selection of a Sand Control Method for an Interbedded Sandstone and Mudstone Reservoir." Geofluids 2020 (August 25, 2020): 1–10. http://dx.doi.org/10.1155/2020/8881967.

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It is critical to select an optimized sand control method for an interbedded sandstone and mudstone reservoir (ISMR) due to its serious sand production hazards. However, currently, most general sand control methods cannot meet the requirements of sand control in interbedded sandstone and mudstone reservoirs (e.g., Bohai Bay oil and gas fields from China). Ensuring efficiency of sand control and increasing the oil and gas production rate in this interbedded sandstone and mudstone become more and more important. In this paper, a “multilayer rotatable sand control experimental device” for the int

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Yousefi, Hossein, Mohamad Aramesh, and Bahman Shabani. "Design Parameters of a Double-Slope Solar Still: Modelling, Sensitivity Analysis, and Optimization." Energies 14, no. 2 (2021): 480. http://dx.doi.org/10.3390/en14020480.

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This study presents a novel, highly detailed, and accurate modelling method for calculation of the total annual solar thermal energy received by a double-slope solar still. The model is further utilized for sensitivity analysis and optimization with the help of Genetic Algorithm and TOPSIS methods. The model reveals that the main parameters that can independently affect solar energy input are the basin length, width, tilt angle, surface azimuth angle, and the glass covers’ inclination angle. The sensitivity of the annual solar energy input to all these parameters is analyzed. Moreover, all the

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Ghalib Abid, Asma, Hayfaa Salman Al-hadithi, and Faiq I. Gorial. "PREDICTIVE VALUE OF SERUM INTERLEUKIN 31 IN DIAGNOSIS OF OSTEOPOROSIS IN POSTMENOPAUSAL WOMAN: A NOVEL CASE–CONTROL STUDY FROM IRAQ." Asian Journal of Pharmaceutical and Clinical Research 11, no. 11 (2018): 503. http://dx.doi.org/10.22159/ajpcr.2018.v11i11.29647.

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Objective: The objective of this study was to assess the predictive value of serum level of interleukin 31 (IL31) in diagnosis of osteoporosis (OP) in postmenopausal women.Methods: This case–control study was conducted on 80 individuals, 50 of them with postmenopausal OP diagnosed using dual X-ray absorptiometry study, and the other 30 were healthy postmenopausal female controls. Serum level of IL31 was measured using enzyme-linked immunosorbent assay technique in both groups.Results: The mean age of patients was 65.3±4.8 years and controls was 61.1±3.9 years. Mean serum IL31 level was signifi

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Liu, Gia-Shie, and Kuo-Ping Lin. "A decision support system of green inventory-routing problem." Industrial Management & Data Systems 119, no. 1 (2019): 89–110. http://dx.doi.org/10.1108/imds-11-2017-0533.

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Purpose The purpose of this paper is to develop a decision support system to consider geographic information, logistics information and greenhouse gas (GHG) emission information to solve the proposed green inventory routing problem (GIRP) for a specific Taiwan publishing logistics firm. Design/methodology/approach A GIRP mathematical model is first constructed to help this specific publishing logistics firm to approximate to the optimal distribution system design. Next, two modified Heuristic-Tabu combination methods that combine savings approach, 2-opt and 1-1 λ-interchange heuristic approach

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Ruiz, Oscar E., Camilo Cortes, Diego A. Acosta, and Mauricio Aristizabal. "Sensitivity analysis in optimized parametric curve fitting." Engineering Computations 32, no. 1 (2015): 37–61. http://dx.doi.org/10.1108/ec-03-2013-0086.

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Purpose – Curve fitting from unordered noisy point samples is needed for surface reconstruction in many applications. In the literature, several approaches have been proposed to solve this problem. However, previous works lack formal characterization of the curve fitting problem and assessment on the effect of several parameters (i.e. scalars that remain constant in the optimization problem), such as control points number (m), curve degree (b), knot vector composition (U), norm degree (k), and point sample size (r) on the optimized curve reconstruction measured by a penalty function (f). The p

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