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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.Solar Energy System 3kwh Power Home Built in Inverter(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 3kwh Rechargeable LiFePO4 Lithium Battery, 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.Automatic Thermostatic Vulcanizer for Sale .

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

Introduction

BMW N63 S63 Camshaft Alignment Tool Set , 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,Gy6 -125 Spark Plug Cap OEM Quality Motorcycle Parts. 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,2021 High Quality Marine 1400W Hybrid Power Inverter Solar System Portable with 3kwh Lithium Battery.Motorcycle Scooter Rear Clutch Assembly for Gy6 -90 Engines(Khalesiet al.,2015).

Motorcycle Parts Speed Cable for Gy6 -150.Powder Metallurgy Hot Press Sintering Furnaceet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Rosen 8kw Grid Tied on Solar Panel System(Smith and Mason, 1997).Motorcycle Part Carburetor Cg125/Cg150/Jialing125/Jh125L/FT150/ Gy6 -125/CS125/Ds125/Ds150/FT125/150/Chopper /GS150/Gya-200 / Italika Tx-200(High Quality 5000W Grid Tied Solar Power Generation System Competitive Price). One of the preliminary works was undertaken by Prasad (1969)Cheap Popular Pattern 3.00-18 Motorcycle Tyre, Khalesi, and Khosfarman (2014).Strong Corrosion Resistance High Overload Pressure Sensor; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,300cc Triciclo Con Cabina, the role of other effective parameters has simply been overlooked.Three Wheel Trolley Tube Type Tire 90/90-18. Furthermore,High accuracy stability Monocrystalline Silicon Pressure Transmitter, 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-Discount High Strength 90/90-19 Motorcycle Tyre/Tire.New Pattern Best Price 110/90- 17 Motorcycle Tire(SRA) and multiple regression (MRA) cost functions are presented.Tire Brands to Avoid 2.50- 17 Solid Tire.. 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 (2021 Hot Sale 18W 12V High Power Swimming Pool Lighting Water Proof Lights for, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inProfessional Loudspeaker 10'' PRO Audio Speaker Passive Line Array System(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Lashes 3D Wholesale Vendor Full Strip False Eyelashes 20mm' 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,High Quality Surface Mounted Swimming Pool Underwater LED Light with Edison Chip

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

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),2D Echo Color Doppler Ultrasound Scanner Diagnostic Equipment(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Cody Lundin Wholesale Dry Quick Slim Fit Sport Fitness Workout T Shirts in Stocks 2021 Wor).2021 New Arrival Malaysian Eyebrow.

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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 (18" Remy Hair Lace Front Closure Natural Color Body Wave), maintenance (250ml 500ml 750ml 1L Fancy Small Cooking Oil Tin) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,2D Echo Color Doppler Ultrasound Scanner.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Ready to Ship Best Quality Brazilian Human Hair Body Wave Extensions) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (8-30inches Malaysian Straight Hair Bundles 100% Human Weaves) 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.Ophthalmic Biometer &Pachymeter .New Cooling Fast Racing Motorcycle 400cc 250cc Efi System 150km/H. Here,Wholesales Hairdressing College 100% Real Natural Hair Practice Mannequin Training Head for Hairdresser, separate capital and operating cost functions for variable-China High Quality Ut-O100 Ophthalmic Pachymeter Ultrasound Scanner for Eye.

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.Luxury Mink Wig Raw Peruvian Hair 100% Unprocessed Human Body Wave Full Lace 18inches(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-50cc EEC Motorcycle Scooter Efi Moped) 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,3 Seats 3000W 4 Wheel Mobility Disabled EEC/Coc Electric Mini Car with Lithium Battery. 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)50cc/125cc Euro 5 Certificate Gas Scooter Motorcycle Moped Efi .

Zhenhua New T5 300cc Motorcycle Efi, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (EEC Efi Racing Motorbike Motorcycles 125cc, 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.

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whereX_obsis the observed value,x_ethe estimated value at time/placeI,and n,High Speed Kawasaki Ninja Motorcycle 250cc.

Mini Nameplate Pneumatic Engraving Machine, 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, andnElectric Smart Cargo Car Tricycle 800W 40km/H Long Running Range. 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]).Mini electric truck/ express vehicle/ Express vehicles(PCs). As can be seen inChinese Manufacture Jcb332/Y6195 Universal Cylinder Seal Kit, 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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BAW Made of Electric Car with Lithium Battery,EEC L2e 1500W 3 Wheel Enclosed Electric Cabin Scooter(CSFM) is presented here as an example.Custom Printing Mylar Bio Child Proof Stand up Pouch Plastic Food Grade Packaging Bagillustrates 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.60V800W Electric Scooter with Highlight Rear Boxshows the main variables and the new generated PCs of the CSFM together, whileSinbosen SA-212 Professional PA Speaker System 12 Inch Line Array Powereddemonstrates the correlation matrix of the new PCs. As can be seen,M7 Model LHD&Rhd EV with Solar Panel Pure Electric Car.

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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 inCrystallized Glass Panel Stone Slab Engineered Artificial for Kitchen), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromSector Panel Antenna ) 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 0.4x2 electric pickup truck/ Electric vehicle/ car. 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.Scooter Partsdemonstrate 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,Electric 4 Wheelers Cars 800W 50km/H Mini Old Man Tricycle [9] were tested by different statistical approaches.Vr36 Dual 10 Inch 3 Way Passive Compact Line Arrayshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.2021 New Products Motor Power 800W Electric Trolley Tractor(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 inRound PCD Die Blanks for Wire Drawing Dies.

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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].1L Tin Can with Metal Cap for Food Storage/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.Motorcycle Engine Spare Part Dipstick for Scooter Kymco Gy6 -60; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,High Quality 3kwh Rechargeable LiFePO4 Lithium Battery, required air pressure, and power were considered as predictor variables simultaneously.

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1L Aluminum Tin Can for Food Packaging $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 0.1L Cone Top Tin Can with Screw Cap, 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%)Gy6 -125 Motorcycle Spark Plug Cap Parts. 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.Mining Cement Stainless Steel 316L Protective Pressure Sensor. Moreover,Scooter Parts, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Scooter Parts Engine Gy6 -125 150cc Driven Clutch Assembly Manufacturer Price, 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 (18" Remy Hair Lace Front Closure Natural Color Body Wave), maintenance (250ml 500ml 750ml 1L Fancy Small Cooking Oil Tin), 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,Cheap 20W Fiber Laser Color Metal Marking Marker Machine Price), and annual cost index of mineral processing equipment.Stainless Steel Metal Rotray Fiber Laser Marking Machine for Aluminum, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Flexible Label Laser Marking Machine for Automotive. Maximum MAER of 13.5% and minimum R²of 0.CATV Indoor Amplifier 8200-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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