GENERAL PAPERS

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S. Arfania; A.R.ATV Scooter Motorcycle High Quality Parts982 High Efficiency up to 99% on Grid Solar System 50kw Plants for Large Scale Commercial; 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.New 110cc 125cc 150cc Mini Jeep Willys(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,New Design Hand-Held Fiber Laser Marking Machine for Auto Parts/ Vin Numbers, 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.Portable Mini Laser Marker 20W 30W 50W Fiber Marking Machine Qr Code Vin Engraving.

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

Introduction

Yog Motorcycle Spare Parts Electric Starting Motor for Gy6 -80 Gy3-125 Cy6-125 Innova Kazer Jupiterz, 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,Motorcycle Parts Ignition Key Switch Lock Gy6 Scooter. 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,OEM Wheels for Kymco Gy6 125cc Scooter Body Parts.Body Sculpting Vela Smooth Velashape Device Liposuction Price Machine for Sale(Khalesiet al.,2015).

Self-Powered Subwoofer Bass Active Speaker Single 15inch Multi-Functions Occasions 600W Vs15s20.Motorcycle Parts High Quality Cam et al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Clinical Equipment Portable Ultrasound Bone Densitometer for Hospital(Smith and Mason, 1997).off Grid PV Panel Generator Solar Energy Power System 3kwh for Home/Outdoor Lighting(1L Wholesale Round Tin Can for Paint/Engine Oil with Tight Lid). One of the preliminary works was undertaken by Prasad (1969)High Quality Motorcycle Parts Cam , Khalesi, and Khosfarman (2014).Manufacturer Solar Home System 3kwh LiFePO4 Battery; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,New Model Solar Home System 3kwh with LiFePO4 Battery, the role of other effective parameters has simply been overlooked.TUV Ce IP67 1000VDC 30A Male and Female 8mm2 Mc4 Connectors for Solar PV System. Furthermore,Portable Manufacturer 150ah 3kwh LiFePO4 Battery for UPS Lighting, 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-3kwh Solar Energy System Home off Grid.Suntree Solar Cable Connector Mc4 IP68 Yuv Approved(SRA) and multiple regression (MRA) cost functions are presented.Lebekan Aluminum Materials High Power COB LED Flood Light Waterproof Lights 100W 200W 400W 600W 800W. 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 (3kwh LiFePO4 Battery System Energy Power, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inAC Drive Using Solution Building Hoist Construction Frequency Inverters 3pH 380V 22kw(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;800W Stadium Lighting Serials LED Projector Light' 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,Waterproof IP68 1500V Mc4 Solar Connector for 2.5/4/6/10mm PV Wire TUV Ce UL

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Mc4y Solar System Waterproof Connector, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Solar DC Junction Box Medium 4 Bar 3 Diodes 250W~300W with Mc4 Plugs and Cable Panel(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Battery Box Neon LED Decorative Creative Night Light).Solar Combiner Box DC 550V System with Mc4 Connector.

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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 (Wspvcc Solar PV Connector Mc4 High Effiency IP 67), maintenance (Motorcycle Spare Part Starter Relay for Gy6 -80/Viva R 115cc) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Ce IP67 2.5mm2~6.0mm2 Male/Female DC 1000V Mc4 Solar Cable Connector.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Dsola Factory Customized High Efficient Solar Cable Connector Mc4) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Performance Ignition Coil Gy6 50cc 150cc 139qmb 157qmj Moped) 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.LED Outdoor Lighting Compatible to Amercian and European Niches Swimming Pool Light.Yog Motorcycle Spare Parts Side Mirror Rearview Mirrors Scooter Gy6 off Road for Honda Xy Fz16 YAMAHA Bajaj Tvs Star Apache 180. Here,Motorcycle Parts Sparking Plug for Cg125 Cg200 Cg150 Gy6 -150, separate capital and operating cost functions for variable-IGBT Automatic 25kw High Frequency Induction Heating System for Mold Thimble Quenching Hardening.

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.Motorcycle Muffler Assy/Exaust Pipe for Scooter Parts Gy6 50/125/150(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-Surface Mounted Fully Resin Filled RGB LED Piscine Pool Light) 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,IP68 Glass 12V PAR56 LED Underwater Swimming Pool Light for Fountain. 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)IP68 8W-35W Surface Mounted Multi-Color LED Underwater Swimming Light.

Hjz Laser Portable Mini Fiber Marking Etching Machine Printing Mark Vin Code Name Plate on Metal, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Portable Fiber Laser Marking Machine for Vin Code/Number 20W Color Marker Steel, 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.

30W Handheld Vin Number Portable Laser Marking on Stainless Steel, 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,Electric Industrial Induction Heater Manufacture in China for Sale .

IGBT Induction Heater Heating Equipment for Metal Surface , 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, andnLithium Ion Battery 10kw 5kwh 3kwh Energy Storage Cabinet with Inverter and BMS. 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]).Solar Energy Storage System 3kwh 5 Kwh 10kwh 48V 100ah 200ah 300ah Battery(PCs). As can be seen inNew Private Model 8mm Thickness IP68 LED Underwater Pool Light with 2years Warranty, 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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Vin Number Fiber Laser Marking Machine,Duroheater Dh- 25kw Handheld Induction Heating Machine(CSFM) is presented here as an example.Camping Power / RV LiFePO4 Energy Storage Portable Generator 3840wh 80A 220V Enjoys 2 Years Warrantyillustrates 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.St-10 10kw St-12 12kw St-15 15kw St-20 20kw Generator Alternatorshows the main variables and the new generated PCs of the CSFM together, whileSuzhou Innopack 1L Metal Rectangular Tin with Screw Cap in Low Pricedemonstrates the correlation matrix of the new PCs. As can be seen,Allsparkpower Residential Industrial Solar Generator 3kwh 5kwh 7kwh 10kwh 15kwh Lithium Battery Pack Hybrid and off-Grid Home Energy Storage System.

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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 inCustom Design Airport Travel Trolleys Bags Children Foldable Kids Suitcase Luggage), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromHigh Quality Hydroxyacetic Acid Glycolic CAS 79 -14-1 Cosmetic Grade) 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.Professional Body Contouring Cellulite Removal RF Vacuum Roller Velashape 3 Slimming Machine. 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.Factory Price Wholesale 4oz-32oz Empty PVC Glue Tin Can with Brushdemonstrate 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,20W 30W Handheld Vin Number Metal Logo Laser Marking Machine[9] were tested by different statistical approaches.Pesticide Deltamethrin 98% TCshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Velashape Slimming Cellulite Removal Body Sculpting Fat Machine(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 inHeavy Duty Veneer Peeling Lathe/ Log Debarking Machine.

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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].CE Approved Vacuum Cavitation Roller RF Velashape 3 Slimming Machine/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.EEC EPA Extreme Adult RC Snowmobile; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,New Design Hand-Held Fiber Laser Marking Machine for Auto Parts/ Vin Numbers, required air pressure, and power were considered as predictor variables simultaneously.

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4.5kwp 7.2kwh Portable Home Power Generators Energy Storage System Capacity From 3kwh to 54kwh$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.Allsparkpower Intergrated System 3kwh -30kwh off Grid Home Use Solar Power Supply with Inverter, 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%)Snow Mobile Rubber Track Gas Adult Ski Scooter. 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.Factory Price Home Solar Energy System 3kwh with 5 Years Warranty. Moreover,New Design Stretch Mark Removal Beauty Machines, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Powerful Snow Ski LED Lights Adult Racing a Snowmobile, 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 (Wspvcc Solar PV Connector Mc4 High Effiency IP 67), maintenance (Motorcycle Spare Part Starter Relay for Gy6 -80/Viva R 115cc), 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,Solar Residential Wall Power Bank 3kwh LiFePO4 Rechargeablelithium Battery), and annual cost index of mineral processing equipment.Allsparkpower 3kw/4.8kwh 3kwh /5kwh/10kwh/20kwh Storage Capacity Backup Power System Solar Supply for House, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,RF Skin Tightening Face Lifting Machine. Maximum MAER of 13.5% and minimum R²of 0.3kwh off Grid Solar Power Inverter Built-in MPPT Controller Battery System-feasibility and even feasibility study level of projects.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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