Proposal for an Integral Quality Index for Urban and Urbanized Beaches

2010 ◽  
Vol 45 (5) ◽  
pp. 998-1013 ◽  
Author(s):  
Eduard Ariza ◽  
Jose A. Jimenez ◽  
Rafael Sarda ◽  
Miriam Villares ◽  
Josep Pinto ◽  
...  
Keyword(s):  
Quality Index ◽  
Integral Quality

ABOUT IMPROVEMENT OF SETS OF REPLACEABLE GEARS GUITARS METAL CUTTING MACHINES

2021 ◽  
pp. 21-25
Author(s):  
A. P. Fot
Keyword(s):  
Quality Index ◽  
Metal Cutting ◽  
Average Density ◽  
Performance Characteristics ◽  
Total Weight ◽  
Computational Experiments ◽  
Resource Saving ◽  
Complex Products ◽  
Integral Quality ◽  
Practical Recommendations

The article is devoted to the problems of modernization of the existing fleet of metal-cutting machines. The purpose and objectives-to determine ways and practical recommendations for resource saving in the production of machine components for the manufacture of complex products. The methods used are comparative computational experiments to determine the performance characteristics of sets of replaceable gears. The presented material contains practical recommendations on the choice of evaluation indicators and improvement of sets of replaceable gears of two-pair guitars of various gear-processing machines (5B12, 5A308P, 5111 and 5K32) based on the results of research. Confirmed the possibility of improving the characteristics of kits while maintaining the number of wheels in the kits. In conclusion, it is noted that the proposed solutions contribute to an increase in the integral quality index by 1,2857 – 6,3742 times, a decrease in the total weight of the wheels of the set by 1,4824 – 3,3093 times, an increase in the number of realized gear ratios by 1,2622 – 3,7525 times, an increase in the average density of the values of the gear ratios by 1,2136 – 3,7781 times.

scholarly journals Synthesis of integral quality index of parametric system state in conditions of situational uncertainty

2016 ◽  
Vol 6 (3 (84)) ◽  
pp. 11-18
Author(s):  
Valeriy Skachkov ◽  
Victor Chepkyi ◽  
Sergey Volkov ◽  
Vladislav Pavlovich
Keyword(s):  
Quality Index ◽  
System State ◽  
Parametric System ◽  
Situational Uncertainty ◽  
Integral Quality

Asymptotic expansion of a solution for one singularly perturbed optimal control problem with a convex integral quality index depends on slow variables and smooth control constraints

2019 ◽  
pp. 119-136
Author(s):  
Alexander Shaburov
Keyword(s):  
Optimal Control ◽  
Quality Index ◽  
Initial Vector ◽  
Control Constraints ◽  
Smooth Control ◽  
Conjugate State ◽  
Slow Variables ◽  
Necessary And Sufficient ◽  
Steady State Control ◽  
Integral Quality

The paper deals with the problem of optimal control with a convex integral quality index depends on slow variables for a linear steady-state control system with a fast and slow variables in the class of piecewise continuous controls with a smooth control constraints x ε = A 11 x ε + A 12 y ε + B 1 u, εy ε = A 21 x ε + A 22 y ε + B 2 u, J ε u ≔φ x ε T + 0 T u(t) 2 dt→ min, t∈ 0, T , x ε0 = x 0 ,u ≤1, y ε0 = y 0 , where x ε ∈Rn , y ε ∈Rm , u∈Rr ; A ij , B i , i, j =1,2, - are constant matrices of the corresponding dimension, and φ(·) - is the strictly convex and cofinite function that is continuously differentiable in Rn in the sense of convex analysis. In the general case, Pontryagin’s maximum principle is a necessary and sufficient optimum condition for the optimization of a such a problem. The initial vector of the conjugate state l ε is the unique vector, thus determining the optimal control. It is proven that in the case of a finite number of control switching points, the asymptotics of the vector l ε has the character of a power series.

scholarly journals Asymptotic expansion of a solution of a singularly perturbed optimal control problem with a convex integral quality index, whose terminal part additively depends on slow and fast variables

2020 ◽  
Vol 55 ◽  
pp. 33-41
Author(s):  
A.R. Danilin ◽  
A.A. Shaburov
Keyword(s):  
Optimal Control ◽  
Control System ◽  
Steady State ◽  
Quality Index ◽  
Control Variable ◽  
Small Mass ◽  
Time Interval ◽  
Terminal Part ◽  
Time Optimal ◽  
Integral Quality

The paper deals with the problem of optimal control with a Boltz-type quality index over a finite time interval for a linear steady-state control system in the class of piecewise continuous controls with smooth control constraints. In particular, we study the problem of controlling the motion of a system of small mass points under the action of a bounded force. The terminal part of the convex integral quality index additively depends on slow and fast variables, and the integral term is a strictly convex function of control variable. If the system is completely controllable, then the Pontryagin maximum principle is a necessary and sufficient condition for optimality. The main difference between this study and previous works is that the equation contains the zero matrix of fast variables and, thus, the results of A.B. Vasilieva on the asymptotic of the fundamental matrix of a control system are not valid. However, the linear steady-state system satisfies the condition of complete controllability. The article shows that problems of optimal control with a convex integral quality index are more regular than time-optimal problems.

scholarly journals COMPUTATION OF PROVIDING SERVICES INTEGRAL QUALITY INDEX

2018 ◽  
Vol 0 (1) ◽  
pp. 34-42
Author(s):  
Larysa Globa ◽  
Ievgeniia Svetsynska ◽  
Ievgen Volvach
Keyword(s):  
Quality Index ◽  
Integral Quality

Homocysteine Levels Show Significant Differences among Mediterranean Dietary Quality Index Variables Compared to Folate and Vitamin B12 Status in Women

2015 ◽  
Vol 85 (3-4) ◽  
pp. 202-210 ◽  
Author(s):  
Ivona Višekruna ◽  
Ivana Rumbak ◽  
Ivana Rumora Samarin ◽  
Irena Keser ◽  
Jasmina Ranilović
Keyword(s):  
Mediterranean Diet ◽  
Diet Quality ◽  
Quality Index ◽  
Fruits And Vegetables ◽  
Reproductive Age ◽  
Dietary Quality ◽  
Vitamin B ◽  
Cross Sectional ◽  
Poor Diet ◽  
The Mediterranean

Abstract. Results of epidemiologic studies and clinical trials have shown that subjects following the Mediterranean diet had lower inflammatory markers such as homocysteine (Hcy). Therefore, the aim of this cross-sectional study was to assess female diet quality with the Mediterranean diet quality index (MDQI) and to determine the correlation between MDQI, homocysteine, folate and vitamin B12 levels in the blood. The study participants were 237 apparently healthy women (96 of reproductive age and 141 postmenopausal) between 25 and 93 years. For each participant, 24-hour dietary recalls for 3 days were collected, MDQI was calculated, and plasma Hcy, serum and erythrocyte folate and vitamin B12 levels were analysed. Total MDQI ranged from 8 to 10 points, which represented a medium-poor diet for the subjects. The strength of correlation using biomarkers, regardless of group type, age, gender and other measured parameters, was ranked from best (0.11) to worst (0.52) for olive oil, fish, fruits and vegetables, grains, and meat, in this order. Hcy levels showed the best response among all markers across all groups and food types. Our study shows significant differences between variables of the MDQI and Hcy levels compared to levels of folate and vitamin B12 in participants with medium-poor diet quality, as evaluated according to MDQI scores.

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