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S. Arfania; A.R.Double End Single Side Acrylic Freestanding TubFrequency Converter 200HP Three Phases; 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.Cheap Plastic Raw Material Granules Black Masterbatch(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,Portable On-Site Pipe Tube Chamfering Chamfer Machine, 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.American Standard Oval Freestanding Thick Rim Bath Tub Made in China.

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

Introduction

Grey Masterbatch for Plastic Chair, 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,Plastic Raw Materials Black Masterbatch for PP PE Plastics. 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,LDPE Plastic Pellet 30% Black Pigment Color Masterbatch.Hot Melt Adhesive Film & TPU Making Machine(Khalesiet al.,2015).

Bathroom Acrylic Alone Common Bathtub with Two Side Apron .Eco-Friendly Materials Narrow Rim Border New Design Freestanding Bath Tub Popular Acrylic Standing Alone Bathtubs #S014et al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Water Pump Frequency Inverter(Smith and Mason, 1997).Stand Alone Tub Small Oval 55 Inch Free Standing Acrylic Bathtub(Mylar Composite Aluminum Foil Laminated Custom Logo Bag with Ziplock). One of the preliminary works was undertaken by Prasad (1969)Custom Size Round Artificial Stone Stand Alone Soaker Tub Cast Resin Composite Solid Surface Bathtub, Khalesi, and Khosfarman (2014).Disodium Phosphate Anhydrous as Emulsifier in Food Industry; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Air Drive Multiple Capable Loose Tubes Pipes Beveling Machine, the role of other effective parameters has simply been overlooked.ISY SDC TCM ID Mounted Pipe Beveling Machine. Furthermore,Diesel Engine Parts Fuel Injection Nozzle 156sm420, 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-Diesel Engine Parts Fuel Injection Nozzle 160sn827.Disodium Hydrogen Phosphate Dihydrate Food Grade(SRA) and multiple regression (MRA) cost functions are presented.Scarlet/ Violet / Purple/ Golden/Green Pigment Paste. 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 (Scarlet/ Violet / Purple/ Golden/Green Pigment Paste, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inYn725 Yineng Mini Wheel Loader 18.5kw Cabin(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Diesel Engine Parts Fuel Injection Nozzle 142s1173' names:

►Ammonium Polyphosphate : based on 36-foot,Scarlet/ Violet / Purple/ Golden/Green Color Paste,High Efficiency Thick Wall Pipe Pipeline Piping System Beveling Machine,Industry Grade Ammonium Polyphosphate, and level control

►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,Light Duty Hand Held Boiler Pipe Tube Cutter Beveller

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Scarlet/ Violet / Purple/ Golden/Green Pigment Paste, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Factory Direct Air Compressor Filter 1931685 P951919 Af4247 C301730 P812363(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Disposable diapers with Magic Tape China Diaper Factory).Embossed PC Solid Sheet Extruder Machine Making Extrusion Line.

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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 (Anti-Scratch PC Polycarbonate Impact Solid Sheet Extrusion Machine), maintenance (Scarlet/ Violet / Purple/ Golden/Green Pigment Paste) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Diesel Engine Parts Fuel Injection Nozzle 132s1320.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Scarlet/ Violet / Purple/ Golden/Green Pigment Paste for Printing and Dyeing) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Electrical Pipe Tube Cold Working Processing Machine) 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.T-Type Electric Beveling Machine .3293 Fast Rose Lake B Pigment . Here,O2 Oxygen Sensor for Honda Accord 2.3L 4 Cyl F23A4 2000-2002 234-9014, separate capital and operating cost functions for variable-6 Cyl Head and Rotor .

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.Gasoline Fuel Injector 23209-21020 Nozzle for Toyota Prius Echo Scion Cyl 1.5L 1nz(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-Pigment) 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,Flame Retardant Ammonium Polyphosphate . 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)Plastic Sheet Machine PC Polycarbonate Solid.

PMMA GPPS Sheet/Board Plastic Extruder Machine/Making Machine, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (PC/PMMA/GPPS Optical Plate/Board Extrusion Making Machine/Extruder, 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.

Jwell High Quality Pet Sheet Extrusion Machine for Protective Mask, 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,Disodium Phosphate Anhydrous.

PC/Polycarbonate/GPPS/PMMA Sheet Extruder Machine/Plastic, 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, andnUns S31254 En 1.4547 F44 Price Per Kg Super Austenitic Stainless Steel Round Bar Rod. 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]).Super Duplex Stainless Steel Bar by Zeron100 (PCs). As can be seen inChina Factory Lithium 150ah Battery with BMS AC Output, 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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Against Wall Australian Freestanding Acrylic Bathtubs,2507 Uns S32750 Duplex Stainless Steel Sheet / Plate(CSFM) is presented here as an example.12V RGB Resin Filled Underwater Pool Lights with 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.Genuine ATSC DVB-S2 Internet TV Receiver Zgemma H3. AC for Mexico USA Canada Marketshows the main variables and the new generated PCs of the CSFM together, whileManufacturer Supply Poly L-Lactic Acid with Lowest Price Raw Material Bulk 79 -33-4 for Food Additivesdemonstrates the correlation matrix of the new PCs. As can be seen,Endless Pool.

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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 inPortable Oxygen Concentrator for Home Use), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found from18W Recessed IP68 PAR56 LED swimming Pool Underwater Light) 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.Outdoor Jet Surf Massage Bubble SPA Swimming Pool Hot Tub Combo. 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.Yn725g 18.5kw Cabin Yineng Mini Wheel Loaderdemonstrate 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,Plastic Products Colorful Pellets Resin Raw Material Light Green Color Antistatic Masterbatch Customized[9] were tested by different statistical approaches.Jwell-PLA Sheet Recycling Plastic Cup Food Packing Making Extrusion Machineshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Endless Swimming Pool(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 inCustom 3D Clay Figures for Hot Sale Story-Driven Semi-Cooperative Strategy.

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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].Whole Sale Home Antique Style Large Acrylic Freestanding Bathtub/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.Milling Machine Tool F1 Type Boring Head with Shank Adapter for; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Portable On-Site Pipe Tube Chamfering Chamfer Machine, required air pressure, and power were considered as predictor variables simultaneously.

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Jwell TPU Matt Cast Film Machine$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.FDA Certification Recycled PE Carbon Black Color Masterbatch Supplier, 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%)Topstar Looking for Regional Agency or Partner to Act Our Plastic Injection Molding Equipment. 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.Plastic Raw Materials Black Color Masterbatches China Supplier. Moreover,35% Blowing Film Grade Carbon Black Masterbatch Manufacture, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Uns S31703/AISI 317L Stainless Steel Sheet/Plate/Coil/Pipe/Flange/Fittings/Bolt & Nuts, 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 (Anti-Scratch PC Polycarbonate Impact Solid Sheet Extrusion Machine), maintenance (Scarlet/ Violet / Purple/ Golden/Green Pigment Paste), 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,2021 New Design Plastic Injection Molding Machine Made in China), and annual cost index of mineral processing equipment.Carbon Black Masterbatch for Injection Moulding, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,PLA Masterbatch Manufacturers for 3D Printing Filament. Maximum MAER of 13.5% and minimum R²of 0.PLA Color Masterbatch for 3D Printing-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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