GENERAL PAPERS

32dBi 5GHz WLAN AntennaCost modelling for flotation machines

S. Arfania; A.R.IP68 8W-35W Surface Mounted Blue Color LED Underwater Swimming LightPhthalaldehyde CAS 643- 79 -8; 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.150ah 3kwh Power Supply Deep Cycle Rechargeable Solar Battery(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,8mm Thickness 160mm 8watt DC12V RGB LED Swimming Pool Underwater Light, 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 0.10W Tabletop Series Fiber Laser Marking Machine.

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

Introduction

Manufacturer 3kwh Long Life Solar Home System with LiFePO4 Battery, 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,Shrink Wrapping Machine for Water Packing . 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,IP68 8W-42W Surface Mounted Multi-Color LED Underwater Swimming Light.3kwh Rechargeable Battery Solar Energy Power System(Khalesiet al.,2015).

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Methodology

Data

Thirty-seven major flotation machines (Excellent Motorcycle Cylinder for Gy6 -100 , 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inRound Shape Paint Chemical Coating 1L Metal Tin Can / Canister with Lid(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;3kwh Power Supply Solar Energy Battery Pack' names:

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►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Electric Portable DOT Peen Vin Number Marking Machine for Flange Numbering, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Highly Quality 1500V Solar Mc4 Energy System Connector IP67 PV(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (China Top Quality Shantui SD22D 220HP Bulldozer for Desert Lands).24watt New RGB Cool White Warm LED Underwater Swimming Pool Light.

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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 (1L High End Glass Vodka Wine Bottle with Matte Black Finish), maintenance (Mc4y Solar Connector) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,1000V Solar Mc4 Energy System Connector IP67 PV.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (RF Wrinkle Removal Beauty Machine) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Thermal RF & Fractional Wrinkle Removal) 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.1L 2L 5L 10L 100ml 200ml 500ml Wine Glass Bottles.Wrinkle Removal Super RF Beauty Machine. Here,Glass Bottle 1L Empty 1000ml Milk, separate capital and operating cost functions for variable-Mc4y Tyco Solar Connector.

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.Mc4 Electronic Connector(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-Empty Plastic Bottle 500ml / 1L /1000ml HDPE Trigger Pump Spray Bottles) 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,1000ml 500ml 250ml Airtight Glass Water Juice Bottle with Clip Top 1L. 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)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, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (30watt New RGB Cool White Warm LED Underwater Swimming Pool Light, 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.

All Terrain Vehicle Tyres ATV Wheel, 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,1L Plastic Trigger Sprayer Bottle with Spray.

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whereC_eis the estimated cost,C_athe actual cost, andn20MHz RF Best Technology for Skin Tighten. 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]).Massage Lymphatic Drainage Body Shaping Slimming Beauty Apparatus(PCs). As can be seen in99% Pure CAS 56-95-1 Bulk Chlorhexidine Diacetate/Acetate Powder, 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.Hy300zh-A1 Lifan 300cc Engine Cargo Tricycle Three Wheel Motorcycle Heavy Duty Motocarrro Motor Trikeshows the main variables and the new generated PCs of the CSFM together, while50ml Amber Brown Syrup Bottle with Graduated Liner and Childproof Insurance Coverdemonstrates the correlation matrix of the new PCs. As can be seen,Body Circumference Reduction RF Vacuum Fast Slimming System Beauty Apparatus.

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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 inHigh Resolution Indoor P3 Full Color LED Display Screen), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromElectric Smart Cargo Car Tricycle 800W 40km/H Long Running Range) 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.Skin Tightening. 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.Hrk Provide Topiramate Powder Price CAS 97240- 79 -4demonstrate 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,Globalipl RF Roller Vacuum Slimming Apparatus[9] were tested by different statistical approaches.Customizable Food Vacuum Smelly Proof Kraft Paper Stand up Mylar Packaging Bag with Zipper& Tear Notchshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.portable Fiber Laser Marker Machine for Eyeglasses Case Accessories(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 inSurgical Disposable Face Mask with Earloop/3-Ply Mask/ Doctor Nurse Patient Medical Protective Factory Certificated Ce ISO14683.

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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].IP68 35W 12V PAR56 LED Underwater Lamp Swimming Pool Light/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.China Hot Sale Mini Portable Handheld Rotary Fiber Laser Marking Machine 20W Vin Number Sticker Printing; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,8mm Thickness 160mm 8watt DC12V RGB LED Swimming Pool Underwater Light, required air pressure, and power were considered as predictor variables simultaneously.

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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$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 0.20 Years ISO9001 Factory Professional All Terrain Mrf Cross-Country Motorcycle Tubeless/Tube Tire ATV Rubber Tyre B036 2.75-18 3.00-18, 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%)DOT Peen Marking Machine Vin Touch Screen for Sale. 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.Hand-Held Fiber Laser Marking Machine for Auto Parts/ Vin Numbers. Moreover,Ignition Coil for Buick Chevrolet Cadillac Isuzu Opel Pontiac 10482928, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (ATV Scooter Motorcycle High Quality Parts, 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 (1L High End Glass Vodka Wine Bottle with Matte Black Finish), maintenance (Mc4y Solar Connector), 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,New 110cc 125cc 150cc Mini Jeep Willys), and annual cost index of mineral processing equipment.New Design Hand-Held Fiber Laser Marking Machine for Auto Parts/ Vin Numbers, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Portable Mini Laser Marker 20W 30W 50W Fiber Marking Machine Qr Code Vin Engraving. Maximum MAER of 13.5% and minimum R²of 0.Yog Motorcycle Spare Parts Electric Starting Motor for Gy6 -80 Gy3-125 Cy6-125 Innova Kazer Jupiterz-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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