APPENDIX C: OPTIMUM ARRANGEMENT OF COMPONENTS IN CONSECUTIVE‐2‐OUT‐OF‐ N : F SYSTEMS

As the offshore industry is developing into deeper and deeper water, station keeping technics are becoming more and more important to the industry. Based on the dynamic positioning system, the thruster assisted mooring system (TAMS) is developed, which consisted of mooring lines and thrusters. The main function of the TAMS is to hold a structure against wind wave and current loads with its thruster and cables, which is mainly evaluated by the holding capacity of the system. The arrangement of the mooring lines (location of anchor or the mooring line angle relative to platform) will directly affect the TAMS holding capacity because of the influence of the directions of the mooring forces. So finding out an optimum arrangement of the mooring lines is essential since the performance of the TAMS depends greatly on the arrangement of the mooring lines. The TAMS of a semi-submersible platform, which is studied in this paper, consisted of eight mooring lines. By fixing the layout of the thrusters and changing the location of each mooring line for every case, the performances of the TAMS are analyzed. The platform motions, mooring line tensions and power consumptions are compared to obtain the optimum arrangement of mooring lines, and thus a thruster assisted mooring system with a better performance can be achieved. Time domain simulation is carried out in this paper to obtain the results.

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The Optimum Arrangement of Working Face Ventilation System for Coal Mine

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.482-484.1691 ◽

2012 ◽

Vol 482-484 ◽

pp. 1691-1694

Author(s):

Ning He ◽

Qiu Ju Ma ◽

Yu Zhu Shi

Keyword(s):

Coal Mine ◽

Ventilation System ◽

Dynamics Simulation ◽

Practical Significance ◽

Gas Migration ◽

Optimal Layout ◽

High Concentration ◽

Working Surface ◽

Working Face ◽

Optimum Arrangement

It was most effective and practical that using computational fluid dynamics simulation to analyze the distribution of flow field in gob for studying optimal layout scheme of the working face ventilation system. In this paper, numerical simulation was applied for studying the migration laws and high concentration of gas gathering area of N1201 working face in Tunliu Coal Mine; the gob of robbing working surface gas migration laws and high concentration of gas gathering area was obtained; the optimum arrangement of ventilation system for the working face was given. The conclusions had a certain theoretical value and practical significance for controlling the working face gas.

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The evaluation of grasses in micro plots

The Journal of Agricultural Science ◽

10.1017/s002185960006041x ◽

1966 ◽

Vol 66 (1) ◽

pp. 147-151 ◽

Cited By ~ 5

Author(s):

H. H. Rogers ◽

A. Lazenby

Keyword(s):

Dry Matter ◽

Matter Content ◽

Tiller Number ◽

Dry Matter Content ◽

Optimum Size ◽

North African ◽

Plot Size ◽

Matter Production ◽

Optimum Arrangement ◽

Uniform Population

1. Two experiments were conducted in a lowtemperature cabinet. In the first experiment three grass varieties (two North African fescues and S 22 Italian rye-grass) were subjected to two cutting treatments (herbage cut from 8 in. to 2 in. and from 4 in. to 1 in.). Dry-matter production, dry-matter content and tiller number were recorded from plots of 9, 16 or 25 plants. The second experiment, a uniformity trial, was planted with a uniform population of a North African fescue. The optimum plot size and shape within the cabinet, and the optimum arrangement of blocks, was determined using a Titan autocode programme.2. Treatment and variety differences could be detected using very small plots. For the material and apparatus used, an 18-plant plot was the optimum size.

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A novel optimum arrangement for a hybrid renewable energy system using developed student psychology based optimizer: A case study

Energy Reports ◽

10.1016/j.egyr.2020.11.168 ◽

2021 ◽

Vol 7 ◽

pp. 70-80

Author(s):

Ruijing Shi ◽

Weiqing Wang ◽

Zhi Yuan ◽

Xiaochao Fan ◽

Ehsan Ramezani

Keyword(s):

Renewable Energy ◽

Energy System ◽

Hybrid Renewable Energy System ◽

Renewable Energy System ◽

Optimum Arrangement ◽

Hybrid Renewable Energy

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Optimum arrangement of two-stage plug and concentrate recycling RO systems using thermodynamic and exergy analysis

International Journal of Numerical Methods for Heat &amp Fluid Flow ◽

10.1108/hff-12-2018-0766 ◽

2019 ◽

Vol 30 (6) ◽

pp. 3323-3348

Author(s):

Abbas Naeimi ◽

Mohammad Hossein Ahmadi ◽

Milad Sadeghzadeh ◽

Alibakhsh Kasaeian

Keyword(s):

Reverse Osmosis ◽

Water Pressure ◽

Optimization Method ◽

Feed Water ◽

Two Stage ◽

Content Type ◽

Optimum Arrangement ◽

North Of Iran ◽

Optimization Parameters ◽

Seawater Reverse Osmosis

Purpose This paper aims to determine the optimum arrangement of a reverse osmosis system in two methods of plug and concentrate recycling. Design/methodology/approach To compare the optimum conditions of these two methods, a seawater reverse osmosis system was considered to produce fresh water at a rate of 4,000 m3/d for Mahyarkala city, located in north of Iran, for a period of 20 years. Using genetic algorithms and two-objective optimization method, the reverse osmosis system was designed. Findings The results showed that exergy efficiency in optimum condition for concentrate recycling and plug methods was 82.6 and 92.4 per cent, respectively. The optimizations results showed that concentrate recycling method, despite a 36 per cent reduction in the initial cost and a 2 per cent increase in maintenance expenses, provides 6 per cent higher recovery and 19.7 per cent less permeate concentration than two-stage plug method. Originality/value Optimization parameters include feed water pressure, the rate of water return from the brine for concentrate recycling system, type of SW membrane, feedwater flow rate and numbers of elements in each pressure vessel (PV). These parameters were also compared to each other in terms of recovery (R) and freshwater unit production cost. In addition, the exergy of all elements was analyzed by selecting the optimal mode of each system.

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The selection of the optimum arrangement of a hydrostatic transmission for a general purpose agricultural tractor

Journal of Terramechanics ◽

10.1016/0022-4898(66)90077-2 ◽

1966 ◽

Vol 3 (2) ◽

pp. 94

Keyword(s):

General Purpose ◽

Hydrostatic Transmission ◽

Optimum Arrangement ◽

Agricultural Tractor ◽

Selection Of

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Gas Turbine Optimum Arrangement for Process Plants

Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering ◽

10.1243/09544089jpme358 ◽

2010 ◽

Vol 224 (4) ◽

pp. 291-298

Author(s):

A Almasi

Keyword(s):

Gas Turbine ◽

Optimum Arrangement ◽

Process Plants

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On Optimum Fibre Orientation in an Annulus

The Aeronautical Journal ◽

10.1017/s000192400005212x ◽

1969 ◽

Vol 73 (703) ◽

pp. 593-594

Author(s):

E. H. Mansfield ◽

Carol Hanson

Keyword(s):

Fibre Orientation ◽

High Strength ◽

Stress Pattern ◽

Carbon Fibres ◽

Optimum Arrangement ◽

Strength And Stiffness ◽

Applied Stresses

The development of carbon fibres which exhibit high strength and stiffness raises many problems in the design of such fibre reinforced structures. One such problem concerns the optimum arrangement of fibres to support a given load system or load envelope, and this has been treated by Harris for planar load envelopes bounded by given values of applied stresses σX, σY and τXY . Here we consider a problem of optimum fibre arrangement to transfer a torque T across an annulus bounded by inner and outer radii r 0 and kr 0, respectively. This problem is much simpler than Harris', insofar as only one load system is considered, but it differs insofar as the stress pattern is not isotropic.

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