GENERAL PAPERS

Best Selling Electric Scooter Mini 800W Cost modelling for flotation machines

S. Arfania; A.R.Professional Manufacture Y Solar Mc4 Energy System Connector PVJwell PLA Pet Plastic Biodegradable Sheet Recycling Cup Making Extrusion Machine; 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.Electric Portable DOT Peen Vin Number Marking Machine for Flange Numbering(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,Highly Quality 1500V Solar Mc4 Energy System Connector IP67 PV, 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 0.24watt New RGB Cool White Warm LED Underwater Swimming Pool Light.

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

Introduction

1L High End Glass Vodka Wine Bottle with Matte Black Finish, 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,Mc4y Solar Connector. 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,1000V Solar Mc4 Energy System Connector IP67 PV.RF Wrinkle Removal Beauty Machine(Khalesiet al.,2015).

Thermal RF & Fractional Wrinkle Removal.1L 2L 5L 10L 100ml 200ml 500ml Wine Glass Bottleset al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 100% Purity Phenol Polyamide Resin(Smith and Mason, 1997).Wrinkle Removal Super RF Beauty Machine(Label Marking Equipment Laser Machine for Car Body Labels). One of the preliminary works was undertaken by Prasad (1969)Glass Bottle 1L Empty 1000ml Milk, Khalesi, and Khosfarman (2014).Mc4y Tyco Solar Connector; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Mc4 Electronic Connector, the role of other effective parameters has simply been overlooked.Empty Plastic Bottle 500ml / 1L /1000ml HDPE Trigger Pump Spray Bottles. Furthermore,1000ml 500ml 250ml Airtight Glass Water Juice Bottle with Clip Top 1L, 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-1L 2L 5 L Plastic HDPE Powder Bottles.Solar Tool Set/Bad/Box Cable Stripping Wire Cutter Mc4 Connector Spanner Wrench for PV System Panel 14-10AWG 2.5-6mm2(SRA) and multiple regression (MRA) cost functions are presented.30watt New RGB Cool White Warm LED Underwater Swimming Pool Light. 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 (All Terrain Vehicle Tyres ATV Wheel, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in2 Way Active Full Range Speaker Mini Portable Powered Loudspeaker(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;1L Plastic Trigger Sprayer Bottle with Spray' 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,Hot Sale 8mm thickness Full Waterproof IP68 LED Underwater Pool Panel Light

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Color Changing Swimming Pool Lights, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Body Circumference Reduction RF Vacuum Fast Slimming System Beauty Apparatus(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Qm2-42 Egg Layer Mobile Concrete Brick Making Machine).Underwater Pool Light with Niche .

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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 (Skin Tightening), maintenance (Globalipl RF Roller Vacuum Slimming Apparatus) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,portable Fiber Laser Marker Machine for Eyeglasses Case Accessories.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (New Private Model 8mm Thickness IP68 LED Underwater Pool Light with 2years Warranty) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (IP68 35W 12V PAR56 LED Underwater Lamp Swimming Pool Light) 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.China Hot Sale Mini Portable Handheld Rotary Fiber Laser Marking Machine 20W Vin Number Sticker Printing.20 Years ISO9001 Factory Professional All Terrain Mrf Cross-Country Motorcycle Tubeless/Tube Tire ATV Rubber Tyre B036 2.75-18 3.00-18. Here,Motorcycle Spare Part Oil Switch for Gy6 150, separate capital and operating cost functions for variable-20 Years ISO9001 Factory Professional All Terrain Motorcycle/Motors Tubeless/Tube Scooter ATV Mrf Rubber Tire/Tyre for Nigeria Egypt Bajaj Motorcy Ds137 2.75- 17.

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.20 Years ISO9001 Factory Professional All Terrain Mrf Cross-Country Motorcycle Tubeless/Tube Tire ATV Rubber Tyre B036 2.75-18 3.00-18(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-DOT Peen Marking Machine Vin Touch Screen for Sale) 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,Hand-Held Fiber Laser Marking Machine for Auto Parts/ Vin Numbers. 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)Ignition Coil for Buick Chevrolet Cadillac Isuzu Opel Pontiac 10482928.

ATV Scooter Motorcycle High Quality Parts, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (New 110cc 125cc 150cc Mini Jeep Willys, 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.

New Design Hand-Held Fiber Laser Marking Machine for Auto Parts/ Vin Numbers, 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,Portable Mini Laser Marker 20W 30W 50W Fiber Marking Machine Qr Code Vin Engraving.

Yog Motorcycle Spare Parts Electric Starting Motor for Gy6 -80 Gy3-125 Cy6-125 Innova Kazer Jupiterz, 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, andnMotorcycle Parts Ignition Key Switch Lock Gy6 Scooter. 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]).OEM Wheels for Kymco Gy6 125cc Scooter Body Parts(PCs). As can be seen inVegetable and Fruit Fertilizer Ammonium Sulfate Nitrogen 21%, 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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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.2021 Hot Sale 18watt RGB Resin Filled Wall Mounted LED Swimming Pool Lights with Two Years Warrantyshows the main variables and the new generated PCs of the CSFM together, whileMedical Equipment Portable Automatic High Effective Ultrasound Bone Densitometerdemonstrates the correlation matrix of the new PCs. As can be seen,off Grid PV Panel Generator Solar Energy Power System 3kwh for Home/Outdoor Lighting.

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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 inTop 10 Company Gift Promotion Campaign Election Advertising Events Uniforms Custom T Shirt), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromThiosemicarbazide CAS 79 -19-6) 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.Manufacturer Solar Home System 3kwh LiFePO4 Battery. 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.Everun New Design Er408 Small Compact 800kg Farm Machinery Wheel Loader with Mixer Bucketdemonstrate 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,New Model Solar Home System 3kwh with LiFePO4 Battery[9] were tested by different statistical approaches.475 Alicosolar Good Quality 15kw on Grid Solar System 15000W Kit Mono Soalr Panel with CE/TUV/ISO for House Useshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.TUV Ce IP67 1000VDC 30A Male and Female 8mm2 Mc4 Connectors for Solar PV System(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 inAcrylic Bubble Surf Bathtub.

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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].3kwh Solar Energy System Home off Grid/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.Suntree Solar Cable Connector Mc4 IP68 Yuv Approved; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Highly Quality 1500V Solar Mc4 Energy System Connector IP67 PV, required air pressure, and power were considered as predictor variables simultaneously.

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800W Stadium Lighting Serials LED Projector Light$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.Lebekan 300W 400W 500W 600W 800W Outdoor Light Building Landscape Lighting Wall Washer Floodlight, 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%)Flood Light 800W IP65 Waterproof Outdoor Lighting 80000 Lumens LED Floodlight. 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.T Solar Mc4 Energy System Connector PV. Moreover,Factory Supply 1 to 2 Male Female Y Branch Mc4 Solar Connector for off Grid System, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Waterproof IP68 1500V Mc4 Solar Connector for 2.5/4/6/10mm PV Wire TUV Ce UL, 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 (Skin Tightening), maintenance (Globalipl RF Roller Vacuum Slimming Apparatus), 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,Mc4y Solar System Waterproof Connector), and annual cost index of mineral processing equipment.Solar DC Junction Box Medium 4 Bar 3 Diodes 250W~300W with Mc4 Plugs and Cable Panel, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Solar Combiner Box DC 550V System with Mc4 Connector. Maximum MAER of 13.5% and minimum R²of 0.Wspvcc Solar PV Connector Mc4 High Effiency IP 67-feasibility and even feasibility study level of projects.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Hot Sale High Performance Vector Frequency Converter 380V 45/55kwHome Use RF Velashape MachineCorresponding author