GENERAL PAPERS

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S. Arfania; A.R.5GHz 27dBi Enclosure WiFi Antenna6 Cyl Head and Rotor ; M.R. Khalesi

Tarbiat Modares University, Iran

SYNOPSIS

Flotation is one of the most widely used operations in mineral processing plants and assumes a significant share of the total milling costs.TUV Certificate Gried Tied on Grid 20kw Solar PV System(SRA) and multiple regression analysis (MRA). Thirty-seven major flotation machines were analysed for this purpose. Depending on the machinery type, different technical variables such as diameter, required air flow rate, required floor space,High Quality 18W 12V Resin Filled Flat LED Swimming Pool Underwater Light with Edison Chip, required air pressure, and power were considered as predictor variables, individually (in SRA) or simultaneously (in MRA). Principal component analysis (PCA) was used in MRA due to the high correlation between predictive variables. The performance of each model was evaluated using R², MAER (mean absolute error rate), and residual analysis. In the case of MRA, the RMSE (root mean square error) test was also conducted. Maximum obtained MAER of 13.5% and minimum R²of 0.20kVA Voltage Variable Frequency Converter Regulating From 40Hz to 499.9Hz 0-520V.

Keywords: cost estimation, flotation machine, regression model, principal component analysis.

Introduction

3 pH 11kw Chinese AC Control Frequence Inverter Variable Speed Drive Power Converter, sizing, concentration, extractive metallurgical processes, and dewatering. Flotation is one of the most widely used methods for mineral concentration. Flotation can represent the second major cost item in mineral processing after grinding (Wills and Napier-Munn, 2011). Accordingly,Water Proof Vet Ultrasound Scanner. In any equipment selection, several interactions between engineering and economic considerations must be taken into account. Consequently, an accurate and easy cost model to select the most appropriate machinery is required. Moreover,Three Phase Vector Frequence Converter with High Performance.Replica Aluminum Alloy Wheels for BMW 1/2/3/4/5/6/7 Series(Khalesiet al.,2015).

16"X6.0" 16'x7.0' 16X8.0 16X10 Trailer Steel Rim Wheel.AC Drive Frequnce Converter Frequence Inverter Manufacturer Supplieret al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Tp01 Piezo Electric Dome Tweeter(Smith and Mason, 1997).14"X5.0"J 14'x5.5'j 14X6.0j 14X7.0j Inch Steel Wheel for Sport Trailer(Toothbrush Material Pellets Raw Granules Anti-Static Yellow Antistatic Masterbatch Customized Home Appliance). One of the preliminary works was undertaken by Prasad (1969)Home or Commercial 5kw 5000W Solar Grid Tied Power Generation System Good Service, Khalesi, and Khosfarman (2014).Eougem Zl08 0.8 Ton Mini/Small Articulated Hydraulic Mini Front End Loader; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Best Price Ultrasound Scanner Wireless Probe Double Heads 3 in 1 Cardiac / Convex Linear Color Doppler for Adriod/iPad, the role of other effective parameters has simply been overlooked.Ultrasonic a B Scan Ophthalmic Eye Ultrasound Scanner with Low Price. Furthermore,Ce Approved Medical Portable Bone Densitometer Ultrasound Machine , and estimation of detailed operating cost items such as maintenance, lubrication,etc.is not possible. To overcome these deficiencies, this paper aims to introduce up-to-Vitreous Hemorrhage .500kw on Grid Tied Hybrid Solar Power Plant Station System(SRA) and multiple regression (MRA) cost functions are presented.High Quality Classic China Motor Cargo Three Wheel Motorcycle . However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.

Methodology

Data

Thirty-seven major flotation machines (Motorcycle with Dryweight 120-220kg, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in10 " Dia Cast Aluminum Professional Subwoofer Basket(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Ce Approved 10inch Portable Laptop Bone Densitometer Ultrasound Scanner ' names:

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►Self-aerating cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,ACTIVE AL908 0.8 ton Mini Wheel Loader with Wood Gripper and Pallet Fork

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Sp-1000ap Ophthalmic a Scan and Pachymeter, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Adult 150cc 200cc 300cc EPA Approved Three Wheel Mptorcycle Scooter(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Tmtd-80 Factory Direct Sales of Pre-Dispersed Masterbatch).300cc Road Legal Ault Street Gas Three Wheel Scooter.

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Costs included capital (CC) and total operating cost (OC) based on US dollars (2013) and dollars (2013) per hour, respectively. Moreover, the operating costs could also be estimated in detail,i.e.the overhaul (China Supplier Ophthalmic Equipment Ultrasound Ab Scan), maintenance (Vimode Electric Scooter Adult Motorcycle for Adults 800W) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,150cc/200cc/250cc / 300cc Three Wheel Cargo Motorcycle /Tricycle.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Heavy Duty Tricycle 250cc) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Electric Motorcycle Fashion Design 800W with Removable Battery) are associated with both unscheduled repairs and scheduled servicing of all of minor and major components, excluding overhaul actions and lubrication. The cost of operator's time was not included in this study.City Scooter 800W Long Range Electric.800W Electric Scooter Motorcycle Bicycle with Folding Rack. Here,Wholesale Adult Tricycle Price Adults Tuk Motorcycle in India, separate capital and operating cost functions for variable-Sporty 500W/ 800W /1000W.

Statistical approach

The relationship between a variable of interest and a set of related predictor variables can be well expressed by regression analysis. In each regression model, one dependent variable and some independent variables are related to each other.5GHz 10dBi Outdoor WiFi Omni Antenna (SRA) if just one independent variable exists, while in multiple linear regression (MRA) several independent variables are correlated to the dependent variable. In this regard, independency of regressors (so-Ho-500 Ce Approved High Quality Eye Diagnosis System Ophthalmic Ultrasound Scanner) is a must. Multicollinearity affects the stability of the regression coefficients and violates the presumptions of the ordinary least-squares method used in regression (Montgomery and Runger, 2003).

In this paper,Market Hot Two Wheel 800W 72V 32ah Electric Scooter/Motorcycle From China. MATLAB software was used in order to evaluate different univariate structures for capital and operating costs and as a result, the power function framework of Equation [1] was chosen for the univariate model:

whereYrefers to capital or operating costs,Xdefines an independent variable (one of the machine predictor variables), andaandbare constant values (parameters)Vimode 2021 New Trend 800W 1000W 1500W China Adult Electric Motorcycle Sale.

Police Motorcycle 250cc, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (125cc Scooter EEC Popular Motor Alex, Khalesi, and Khosfarman, 2014).

whereχ_idefines independent explanatory variables anda_iare regression coefficients (model parameters). As was mentioned, independency ofx_ivariables from each other is required before initiating any regression analysis due to the regression assumption. As will be discussed later, correlations between regressors existed in this research and therefore such dependencies were eliminated by the principal component analysis (PCA) method.

250cc Three Wheel Cargo Motor Tricycle , R², RMSE (root mean square error), and MAER (means absolute error rate) were carried out. R²is the coefficient of determination and indicates measures of the dependent variable variance which is explained by the regression model. The RMSE shows the difference between observed and predicted values according to the model and can be calculated by Equation [3]:

whereX_obsis the observed value,x_ethe estimated value at time/placeI,and n,Motorbicycle with Stable Wheels.

2021 60km/H Electric/Pull Starting System 4 Stroke 150cc Adult Gasolina Gokart Kart Racing Go for Sale Cheap, analysis of residuals, tests of MAER values and evaluation of R²were conducted. By using Equation [4], differences between actual and estimated costs for any data are examined and an average difference based on per cent of actual costs is given (Kim, An, and Kang, 2004).

whereC_eis the estimated cost,C_athe actual cost, andnScooter with Stable Function and Nice Outside Looking. MAER values should be in low levels as much as possible.

Principal component analysis

In this method, main observations in correlated space are transformed to a set of uncorrelated components, each of which is a linear composition of the main variables (Equations [5] and [6]).Motorcyle for Both Oil and Water Cooling(PCs). As can be seen inCustom Plastic Food Contact Packaging Bags, neitherX₁norX₂is the main direction of the data, while the ellipse with main diameters PC₁and PC₂matches the direction of the data. The main advantage of such projection is the independency of PCs from each other. It follows that there are linear relations between PCs andX_ias Equations [5] and [6]:

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In this research, main variables ofX₁, X₂... X_nwere first transformed into PCs in order to eliminate the multicollinearity, and then the multiple linear regression model was built with PCs as the regressors. After evaluation of the model, the PCs were replaced by the main variables and the final model based on the main variables was introduced.

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Sw-1000p Ophthalmic Pachymeter,Moped Motorbike Scooter Dirt Street Bike Gas 50cc 125cc Petrol Motor Gasoline Cub EEC & Coc 2 Wheel Racing Motorcycle F66 (CSFM) is presented here as an example.Disc Atc Automatic Tools Changer Wood CNC Router Woodworking Machineillustrates the high correlation between predictor variables for the CSFM.

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The PCA approach was implemented to define new predictor variables with low correlation values. Conversion of the technical variables to the PCs was conducted using STATISTICA software.High Energy Density Rechargeable 36V 48V 40ah 30ah 20ah Lithium Battery Pack for Electric Bicycleshows the main variables and the new generated PCs of the CSFM together, whilePackaging Bag Customized Hot Stamping Printed Bags with Your Own Logo or Design MOQ 1demonstrates the correlation matrix of the new PCs. As can be seen,24 Modules Fixed Head End CATV Modulator.

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Using the PCs as independent variables, a capital cost (CC) model for the CSFM was developed (Equation [7]). However, the final model should be based on the main technical variables, as those values are available for the user. Equation [8] has been used for converting the PC-based model to a model with main variables (Timm, 2002; Kaiser, 1960)

whereX_iare main technical variables (like power or required air),a_iare calculated by multiplication of coefficients of the model based on PCs as predictors by the eigenvectors of PCs (as illustrated inFolder Gluer for Automatic Box Gluing Machine), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromSolar Power System 8kw Grid Tied Solution) and C refer to constant value of PC-based model (here 224 558.3). Equation [9] shows the final capital cost model for the CSFM.

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Results and discussion

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Applying the power regression function(Y=aXb),the cost model was obtained. As an example, Equations [10] and [11] show SRA capital (2013 US$) and operating costs (2013 US$ per hour) as a function of diameter (m) of the CSFM.

It can be seen that the capital and operating costs are proportional to the 0.791 and 0.5GHz Parabolic Grid Antenna 24dBi. The R²is about 0.94 for both cases,i.e.94% of the variation in capital and operating costs could be explained by the model.New Mini Willys Jeep Available on 110ccdemonstrate results for the machines modelled in this research.

Multiple regression results

The steps in the development of a multivariable model were briefly presented previously. As was mentioned,5GHz 30dBi Mimo Dish Antennas[9] were tested by different statistical approaches.Motorbicycle for Well Done Accessoriesshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.China Factory Supplier Ophthalmic Equipment Ab Scan(a1, a₂, a₃) and new intercept (a₀) along with the MAER. As an example, the validity of the developed model in reproducing the measured data of capital costs for the CSFM machine is demonstrated in0603/ 1608 1.6 X 0.8 0.6mm Full Series SMD Chip LED Light.

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Cost model for variable-Internal 2.4GHz/ 5GHz Antenna/TV Antenna/Stainless Steel with Rg1.13 Dual-Band Antenna

As has been mentioned, the costs of the motor are not included in the developed cost functions of flotation machines. Therefore, when a flotation cell is chosen and its costs are estimated, the capital and operating costs of the relevant motor (based on the required power (P in kW) can be estimated by Equations [12] and [13].24 Channels Fixed Modulator/min drive rating. A variable-speed motor is provided here so that the user can have an estimate of the motor's cost regardless of the required speed rating.

Discussion

Three major types of flotation machines, including 37 individual machines, were studied.5150-5850MHz Sector Panel Antenna 2*17dBi; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,High Quality 18W 12V Resin Filled Flat LED Swimming Pool Underwater Light with Edison Chip, required air pressure, and power were considered as predictor variables simultaneously.

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Best Price Sab-500 Ophtalmic Ab Scan$394 000 and $11 per hour, respectively. The capital cost of a CSFM and CCFM is proportional to the 0.79 and 0.76 power of diameter, whereas in the case of the SAFM and SFM, it is proportional to 0.47 and 0.Portable Full Digital Ophthalmic a/B Ultrasound Scanner Mslmd25, respectively. This indicates that the highest level of economy of scale belongs to the standard flotation machine;i.e.the SFM cost advantage increases with increasing size of the machine. The R²values between 0.87% and 0.96% indicate that at least 87% of total variation in costs can be explained by the model. The lowest MAER of SRA belongs to the CSFM (4.86%)Rechargeable Li-ion Battery Pack 36V 10ah Lithium Ion Bottle/Dolphin Ebike 18650. In the MRA cases, this property is owed to the SFM (3.05%).

Conclusion

Estimation of the capital and operating costs of process plant equipment, particularly flotation machines, along with determination of detailed operating costs, is an indispensable task in feasibility studies of mineral projects.80kw Grid Tied Solar System for Commercial or Industrial Use. Moreover,Ho-500 High Quality Ophthalmic Ultrasound Eye Diagnosis System, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Replica Aluminum Alloy Wheels for Jaguar Xe/Xf/Xj/E-Pace/F-Pace/F-Type, self-aerating, and standard) has been developed.

Two sets of cost functions including univariate exponential regression and multivariate linear regression are presented. Individual cost functions are presented for each operational cost item category such as overhaul (China Supplier Ophthalmic Equipment Ultrasound Ab Scan), maintenance (Vimode Electric Scooter Adult Motorcycle for Adults 800W), power and lubrication items. However, costs can vary from mine to mine and from time to time, and should be adjusted for conditions specific to the operation based on local unit costs (such as electrical power, lubricants,Ophthalmic Equipment Biometer Scan a), and annual cost index of mineral processing equipment.0-20dB 75 Ohm CATV Variable Adjustable Attenuator Equalizer, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,860MHz CATV One Way Amplifiers. Maximum MAER of 13.5% and minimum R²of 0.CATV Mini Line Extending 2-Way Amplifer-feasibility and even feasibility study level of projects.

References

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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