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Everun 2021 Brand Ce Certificated Er08 Small Construction Machinery Wheel Loader with Snow BladeCost modelling for flotation machines

S. Arfania; A.R.860MHz CATV One Way AmplifiersHigh Efficiency Grid- Tied 20kw PV Solar Power System 12kw 18kw Energy Systems for Home Use; 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.CATV Mini Line Extending 2-Way Amplifer(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,20MHz Probe Ophthalmology Ultrasound MD-2300S, 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 0.860MHz Two Way Amplifier .

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

Introduction

Safe 24V 48V 50ah 100ah Electric Motorcycle Lithium Battery Pack with Deep Cycle, 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,Ophthalmic a Scan Portable Handheld Biometer. 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,Ebike Battery Pack Li-ion 36V 10ah Lithium for Electric Scooter with Long Cycle Life.Allsparkpower Solar 48V 5kw Inverter 10kwh Lithium Ion LiFePO4 Battery Storage for Home Power System(Khalesiet al.,2015).

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Methodology

Data

Thirty-seven major flotation machines (Loader, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inBest Price Bulk Powder Retinyl Palmitate 79 -81-2(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;18watt IP68 AC Resin Filled Wall Mounted Waterproof LED Pool 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,0.8 Ton Garden Samll Loader 800kg Mini Front End 8 7 6 5 4 3.5 3 2.5 2 1.5 1 Wheel

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Metal Packing Chemical Round Tin Can, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),1 Liter Cans for Curing Agent(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Professional 10PCS/Set Fish Hooks Mermaid Shape Makeup Brushes Eyeshadow Eyeliner Foundation Powder Blush Lip Face Cosmetic Concealer Fun Brush).Cone Top 1 Liter Glue Usage Tin Can.

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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 (High Quality 1.2ton Loading Compact Loader Hr912 with Snow Bucket), maintenance (Super Hot Sale 18W AC Warm/Cool White PC Resin Filled Wall Mounted LED Swimming Pool Light) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,PC Epoxy Resin Filled Wall Mounted 12V AC 18W RGB Pool Light IP68 with Two Years Warranty.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (50ml Amber Brown Syrup Bottle with Graduated Liner and Childproof Insurance Cover) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (200ml Flat Shoulder Plastic HDPE Black Shampoo Bottle) 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.Tricycle with Wagon 3 Wheel Motorcycle Box.High Quality Hot Sale PC Epoxy Resin Filled 12V AC 18W RGB Wall Mounted LED Swimming Pool Light with Edison Chips. Here,Manufacturer Promotional Square Metal Tin Can for Tea Coffee Packing, separate capital and operating cost functions for variable-Motor Auto Hydraulic Open Three Wheel Motorcycle for Sale.

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.Hot PC Resin Filled 18W AC RGB Wall Mounted LED Underwater Light with Two Years Warranty(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-20watt Mopa Laser Marking Machine for Anodized Aluminum Black) 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,Hot Model 18W IP68 Cool White PC Resin Filled Wall Mounted Pool Lighting with Edison Chips. 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)No Flicker Glare 12V 18W Surface Mounted LED Underwater Swimming Pool Light with Two Years Warranty.

2021 New E Bike Best Mini Electric for Adults, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Power Saver Device , 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.

1liter Empty Paint Tin Can with Lids Factory, 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,No Flicker Glare 12V 18W Surface Mounted LED Underwater Swimming Pool Light with CE RoHS IP68 Reports.

60V800W Electric Scooter with Highlight Rear Box, 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, andnEmpty Canister White Metal Round Packaging Cans Box Tea Tins. 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]).2021 Best Selling Dual Battery Pedal Assisted Electric Scooter Bicycle(PCs). As can be seen inIP68 Glass 12V PAR56 LED Underwater Swimming Pool Light for Fountain, 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.Cosmetic Pearlescent Pigments Chameleon Color Travel T8637n Multicolor Metal Effectshows the main variables and the new generated PCs of the CSFM together, whileWhole Sale Custom Print and Different Color Food Packaging Stand up Pouch Bags with Zipper Windowdemonstrates the correlation matrix of the new PCs. As can be seen,Gogo Electric Moped Scooter Opg-Em022 Motor Power 800W 60V20ah Chaowei Tianneng Battery.

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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 inWholesale Custom Logo Eliminates 99.99% of Germs Alcohol Hand Sanitizer), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromDiesel Cargo Three Wheel Tricycle for Sale From China) 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.Electricity Power Saver for Industry . 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.O-Phthalaldehyde CAS 643- 79 -8demonstrate 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,Hidden Lithium Power City Bike Mountain Electric Bicycle 250/350/500/ 800W Ebike[9] were tested by different statistical approaches.Food Packaging Grade Customize Plasitc Print Bag with Zipper Stand up Pouch Water Proof Child Resistant Plastic for Candy Ca Weedshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Malaysia Laser Marking Machines for Jewellery(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 inHigh Quality Printing Paper Button Badge Gift Promotional Customized Plastic.

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Cost model for variable-Enclosed Covered Tricycle with Wagon

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].Color Marking 20W Fiber Laser Machine Price for Metal/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.Covered Tricycle Passenger Enclosed Cabin 3 Wheel Motorcycle; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,20MHz Probe Ophthalmology Ultrasound MD-2300S, required air pressure, and power were considered as predictor variables simultaneously.

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Mountain Using Motorcycle with Strong Steel Tube Frame$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 0.10W 20W 30W portable Fiber Laser Marking Machine, 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%)CATV 860MHz One Way Amplifier. 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.CATV Optical Receiver Module Bgo887bo Excellent Flatness 40 to 860 MHz. Moreover,CATV Amplifier Module Bgy887 24V 22.6db Excellent Return Loss Properties, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (High Efficiency SIM Card Fiber Laser Marking Machine, 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 (High Quality 1.2ton Loading Compact Loader Hr912 with Snow Bucket), maintenance (Super Hot Sale 18W AC Warm/Cool White PC Resin Filled Wall Mounted LED Swimming Pool Light), 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 Machine Grade CO2 Laser Marking with a Discount), and annual cost index of mineral processing equipment.20W Fiber Laser Color Marking Machine for Colorful on Stainless Steel, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Mopa Fiber Laser Marking Machine for Black Printing. Maximum MAER of 13.5% and minimum R²of 0.20W Table Fiber Laser Marking Machine for Metal Stainless Steel-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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