Optimization Study Based on the Mileage-Saving Method of Oil Distribution

2013 ◽  
Vol 779-780 ◽  
pp. 1805-1808
Author(s):  
Min Jie Zhu ◽  
Jian Wei Zhang
Keyword(s):  
Vehicle Scheduling ◽  
Oil Distribution ◽  
Optimization Study ◽  
Load Limit ◽  
Distribution Cost ◽  
The Relationship

In this paper,in view of the relationship between the distribution cost and the optimization path for oil distribution, based on the load limit of the vehicle scheduling, we tried to study the optimization path for oil distribution by the method of the mileage-saving. Keywords: Oil Distribution, Distribution Path, Distribution Cost, Mileage-saving Method

A cost optimization study of flux and fouling rate for UF in the water industry

2008 ◽  
Vol 8 (1) ◽  
pp. 113-120 ◽  
Author(s):  
G. K. Pearce
Keyword(s):  
Membrane Fouling ◽  
Cost Optimization ◽  
Plant Size ◽  
Operating Pressure ◽  
High Flux ◽  
Chemical Cleaning ◽  
Critical Flux ◽  
Membrane Area ◽  
Optimization Study ◽  
The Relationship

Designing a commercial UF/MF system is an exercise in compromise. Selecting a high flux reduces capex by minimizing the membrane area required, but increases operating costs due to the increased chemical cleaning frequency, higher waste disposal volumes, and higher operating pressure. Most commercial systems are designed to run at fluxes significantly above the critical flux, so a degree of fouling and a reliance on chemical cleaning is inherent to the design. This paper examines the relationship between flux and membrane fouling rate through a review of experimental field data. The analysis shows that fouling rate increases exponentially with flux, with a function dependent upon the characteristics of the feed. The paper then presents the results of a cost optimization study in which Total Water Cost (TWC) is evaluated as a function of feed source and plant size for different CIP cleaning frequencies. The minimum TWC occurs in all cases for CIP frequencies of between 1/week and 1/month. Smaller plants with low fouling feeds have an optimum near 1 CIP/week using a relatively high flux design. In contrast, feeds with higher fouling propensity, and medium or large plant sizes have a TWC optimum close to 1 CIP/month, and should use a lower design flux. It is suggested that the flux corresponding to the TWC optimum should be designated the sustainable flux.

Fatigue Resistance of BBSG Asphalt Mix with Recycled Asphalt Aggregate Addition

2019 ◽  
Vol 43 ◽  
pp. 25-32
Author(s):  
Abdelhak Bordjiba ◽  
Hassib Rhailia
Keyword(s):  
Sustainable Development ◽  
Surface Layer ◽  
Life Cycle ◽  
Fatigue Test ◽  
Fatigue Resistance ◽  
Recycled Asphalt ◽  
Optimization Study ◽  
Asphalt Mix ◽  
The Relationship

Climatic and traffic effects are the causes of aging of the surface layer of asphalt, which leads to the necessary renovation of the latter. The use of waste from the tread layer provides a viable and beneficial solution for the environment and the economy. However, this solution must meet the requirement of sustainable development, which necessitates that a road has a very long lifespan. In this study we investigated the performance of recycled asphalt in terms of fatigue (as an element of life-cycle control). All the formulas were tested by the fatigue test in order to define the influence of the proportions of the asphalt aggregates, penetrability of the new binder used, and the manufacturing temperature. The results obtained showed the relationship between the contribution binder (reproduced between the new binder and the old binder) and the fatigue resistance under the influence of the parameters that we have mentioned above. At the end an optimization study has been carried out in order to determine exactly the doses required to formulate recycled asphalt resisted to fatigue The optimization seeks to maximize the asphalt aggregates and minimize the temperature of manufacture with a class of the binder compatible.

scholarly journals Influence of the penetrability of the new bitumen and the temperature of manufacture on the resistance of the asphalt recycled to the fatigue

2018 ◽  
Vol 13 (1) ◽  
pp. 39-50
Author(s):  
Bordjiba Abdelhak ◽  
Guenfoud Hamza
Keyword(s):  
Sustainable Development ◽  
Surface Layer ◽  
Life Cycle ◽  
Fatigue Test ◽  
Fatigue Resistance ◽  
Recycled Asphalt ◽  
Optimization Study ◽  
The Relationship

Abstract Climatic and traffic effects are the causes of aging of the surface layer of asphalt, which leads to the necessary renovation of the latter. The use of waste from the tread layer provides a viable and beneficial solution for the environment and the economy. However, this solution must meet the requirement of sustainable development, which necessitates that a road has a very long lifespan. In this study we investigated the performance of recycled asphalt in terms of fatigue (as an element of life-cycle control). All the formulas were tested by the fatigue test in order to define the influence of the proportions of the asphalt aggregates, penetrability of the new binder used, and the manufacturing temperature. The results obtained showed the relationship between the contribution binder (reproduced between the new binder and the old binder) and the fatigue resistance under the influence of the parameters that we have mentioned above. At the end an optimization study has been carried in order to determine exactly the doses required to formulate recycled asphalt resisted to fatigue, the optimization seeks to maximize the asphalt aggregates and minimized the temperature of manufacture with a class of the binder compatible.

Dynamic Vehicle Scheduling with Time Windows Model and Optimization

2014 ◽  
Vol 539 ◽  
pp. 855-859
Author(s):  
Rui Wang ◽  
Ning Guo
Keyword(s):  
Time Windows ◽  
Research Direction ◽  
Vehicle Scheduling ◽  
Future Research ◽  
Future Research Direction ◽  
Scheduling Optimization ◽  
Broad Application ◽  
Optimization Study ◽  
Important Significance ◽  
Application Prospects

The logistics vehicle scheduling optimization is a hot issue in the field, and its research can greatly reduce transportation costs, and meet the different needs of the logistics supply chain to the maximum extent, and to promote the improvement and development of logistics management has a very important significance and broad application prospects. In recent years, scholars of domestic distribution vehicle scheduling optimization study outcomes were systematically organize, and commentary from many aspects of the models, algorithms, research methods, and discusses some of the problems and prospects for future research direction.

Thickness Optimization Study of Constrained Damping Plate

2012 ◽  
Vol 226-228 ◽  
pp. 436-439
Author(s):  
Hao Chuan Wan ◽  
Ling Zheng ◽  
Yi Nong Li
Keyword(s):  
Natural Frequency ◽  
Loss Factor ◽  
Added Mass ◽  
Structural Vibration ◽  
Viscoelastic Layer ◽  
Thickness Optimization ◽  
Damping Effect ◽  
Optimization Study ◽  
Constrained Damping ◽  
The Relationship

Based on Kirchhoff hypothesis, the vibration equations of constrained damping plate are established and the equations are solved. Influence of the thicknesses of constrained layer and viscoelastic layer on structural vibration character are analyzed, the curves of natural frequency and loss factor with different thicknesses of viscoelastic layer and constrained layer are obtained. The figures indicated that it is not the more thickness of the viscoelastic layer and constrained layer the higher of the loss factor. Both of the thicknesses have optimum values, which are interact. The relationship between of loss factor and added mass is investigated. The results show that various thickness plans can obtain the same loss factor but very different added mass. So it is very necessary to optimize the thickness of viscoelastic layer and constrained layer to obtain the best damping effect.

scholarly journals Synergistic Effect of Expanded Graphite-Silane Functionalized Silica as a Hybrid Additive in Improving the Thermal Conductivity of Cementitious Grouts with Controllable Water Uptake

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3561
Author(s):  
Ilayda Berktas ◽  
Ali Nejad Ghafar ◽  
Patrick Fontana ◽  
Ayten Caputcu ◽  
Yusuf Menceloglu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Water Demand ◽  
Expanded Graphite ◽  
Coupling Agents ◽  
Formulation Development ◽  
Silane Coupling Agents ◽  
Optimization Study ◽  
Loading Ratio ◽  
Grouting Materials ◽  
The Relationship

Recently, a growing demand for geothermal applications has led to the exploitation of energy efficiently by developing grouting materials in the borehole between pipes and the ground. Therefore, the current study developed newly formulated cementitious grouts by the integration of expanded graphite (EG)-based hybrid additives synthesized by building chemical bridges between silica particles and EG in the presence of amino functional silane coupling agents. These produced hybrid additives with controlled EG and silica ratios were utilized in grout mixtures used in borehole heat exchangers to enhance the thermal conductivity. According to the optimization study on the formulation development of grout mixtures with bentonite, silica sands, cement, and superplasticizer by adding neat EG and EG-based hybrids, the relationship between the carbon amount and water demand was found to have a significant impact on thermal conductivity. The highest thermal conductivity value of 2.656 W/mK was achieved by the incorporation of 5 wt% hybrid additive with the ratio silica/EG of 1:5 compared to the reference grout, which showed a thermal conductivity of 2.373 W/mK. Therefore, the enhancement in thermal conductivity was dependent on the increase in the EG content and also the additive loading ratio, resulting in a slight increase in the water demand.

scholarly journals An optimization study of polishing efficiency of blisk and its technological parameters

2020 ◽  
Vol 103 (3) ◽  
pp. 003685042095785
Author(s):  
Wenbo Huai ◽  
Xiaojun Lin
Keyword(s):  
Surface Roughness ◽  
Optimization Method ◽  
Test Results ◽  
Technological Parameters ◽  
Optimization Study ◽  
Blisk Blade ◽  
Aero Engines ◽  
Five Axis ◽  
The Relationship ◽  
Polishing Efficiency

When applied to blisk blade profile polishing of aero-engines, “five-axis NC + flexible grinding head + elastic grindstone” polishing technological equipment has advantages of high precision, minor interference, favorable adaptivity, etc. In order to improve the polishing quality and polishing efficiency, a mathematical calculation formula of polishing efficiency was established according to the polishing principles of elastic grindstone (sanding wheel). The optimized combination of technological parameters ( ω = 6000 r/min, ap = 0.9 mm, vf = 320 mm/min) was obtained through the range method of orthogonal test results with double optimization objectives—surface roughness and polishing efficiency. Based on the relationship between number of polishing times and surface roughness, a technological program was put forward, that is, polishing is firstly conducted using 320# sanding wheel for 6 times and then 400# sanding wheel for 9 times (totally 15 times) under the optimized combination of technological parameters, then surface roughness less 0.4 μm can be achieved. Blade polishing test results indicate that: efficiency-optimized technological parameters can not only significantly shorten polishing time but also acquire qualified blade surface roughness less 0.4 μm, thus verifying reliability of the optimization method and results.

scholarly journals Optimization study of dye removal by cement kiln dust using the central composite design of experiments

2014 ◽  
Vol 17 (1) ◽  
pp. 93-102
Keyword(s):  
Central Composite Design ◽  
Factorial Design ◽  
Removal Efficiency ◽  
Dye Removal ◽  
Cement Kiln ◽  
Designed Experiments ◽  
Optimization Study ◽  
The Relationship ◽  
Kiln Dust ◽  
Central Composite

<div> <p>Designed experiments are used to systematically examine the relationship between response variable and a set of experimental factors. In this study, 2<sup>3</sup> factorial design with center points was used to verify the selected experimental factors influence the removal efficiency and linearity assumption is not valid. Optimization experiments were then done to determine the best settings of the experimental factors and define the nature of curvature. Central Composite Design was used to fit a second-degree model since it was possible to build the previous 2<sup>3</sup> factorial design up into a central composite design by adding axial points. According to optimization results, the removal efficiency is maximized when concentration:110 mg l<sup>-1</sup>, dosage: 22 g l<sup>-1</sup> and reaction time: 123 min. The predicted yield at these settings is 99.4623%.&nbsp;</p> </div> <p>&nbsp;</p>

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