GENERAL PAPERS

Hotel Bedroom Furniture/Hotel Furniture/Apartment Living Room Sofa/Hospitality Sofa/Hotel Sofa/Modern Sofa for 5 Star Cost modelling for flotation machines

S. Arfania; A.R.Factory-Full Baltic White Birch Plywood From Factory 12mm 15mm800W Stadium Lighting Serials LED Projector Light; 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.Sapelli Plywood(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,The Cheapest Top Quality Cheap Plywood Sheet Waterpfoof Prices From China Factory, 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.Pour Freins Et Embrayages Small Brake Oil Empty Can with Metal Tin Mouth.

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

Introduction

Race 4 Stroke Gasoline 9HP Reverse Transmission Go Kart, 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,Electric Scooter 800W 60V20ah Lead Acid. 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,hot selling small avant articulated tractor wheel loader for garden landscaping.UV White Birch Plywood 18mm Carb E0 Cabinet(Khalesiet al.,2015).

18mm Pine/Combi Core Waterproof Plastic Black Film Faced Plywood.China 125cc 150cc Scooter Euro 4 Stroke Motorbike Moped EPA 49cc 50cc Electric Carburetor EEC Gaset al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Titan Brand 0.8 Ton High Quality Mini Wheel Loader with and Performance.(Smith and Mason, 1997).Customizable Print Size Easy Open Round Seed Tin Can with Metal Cap and Plastic(Underwater Swimming Pool Light Decoration LED Lamp). One of the preliminary works was undertaken by Prasad (1969)350ml Cmyk Printing Empty Motorbike Engine Flush Shooter Tin Can for Speed Gasoline Additive, Khalesi, and Khosfarman (2014).French Hot Sale Huile D'olive Food Grade Packing Olive Oil Tin Can; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,250ml Round Linseed Perilla Seed Oil Tin Can with 28mm Flip Top Cap, the role of other effective parameters has simply been overlooked.SGS Food Grade Certification 500ml Tin Containers Olive Oil Can. Furthermore,Wholesale Round Food Packaging Empty Tin Metal Cooking Oil Cans, 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-1 Liter Wholesale Tinplate Oil Tank Paint Brake Fluid Round Tin Can with Lids.2021 Everun New Design Er408 Small Front End Loader 0.8ton Mini Wheel(SRA) and multiple regression (MRA) cost functions are presented.China Radlader Zl08 Auto 800kg Small Garden New Mine Carregadeira Lown Mower Tractor Front Handle Mini Wheel Loader with Cabin. 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 (Chinese Eougem Zl08 Wheel Loader with Torque Converter, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inHigh Purity Organic Intermediate  1(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Articulated Mini Wheel Loader Er08 Telescopic Boom' 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,48V/60V 800W Electric Scooter with Lead-Acid Battery

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,800W 60V Lead-Acid Battery Electric Bicycle with Back Rest, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Electric Motorcycle 800W for Adult Motor(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Wholesale KN95 FFP2 Dust Disposable Adult Protective Face Mask).Hot Sale Lady Style 60V 800W 20ah Electric Scooter with USB.

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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 (800W -1000W 60V/72V Electric Scooter with Lead-Acid Battery), maintenance (Rosen 5kw on Grid Solar System with Tied Inverter) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Solar Energy System 5kw Panel Home Grid Tied Power.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (200kw Grid Tied Solar System for Factory Use) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Grid Tied Inverter 10kw 15kw 20kw Home Set Solar System) 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.1kw Solar Power System Grid Tied 1000W on Panel Price.Commercial Solar System 100kw Grid Tied /on 100kVA 60kw. Here,Bintangor Okoume Pencil Ceder Commercial Plywood for Furniture and Decoration, separate capital and operating cost functions for variable-Pumping Jarol 380V 3 Phase 15kw 20HP Frequency Inverter/Converter/Drive with IGBT.

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 selling compact 800kgs wheel loader for garden(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-High Efficiency 6kw Grid Tied Solar Power System for Home) 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,China Safe Automatic CVT 150cc Go Kart Motor with Reverse. 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)3 Phase VFD Vector AC Drives 1.5kw 2.2kw 4kw Variable Frequency Drive.

Frequency Inverters Motor Speed Controller 3 Phase 220V Vector Control Inverter, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Carb P2 Plywood/EPA Plywood /Okoume, 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,Variable Speed Drive Phree Phase Frequency Converter 1000Hz.

Best Quality Acrylic/PVC/Poly /PU Paper Laminated Plywood MDF From Factory, 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, andn3 Phase VFD AC Drives 1.5kw 2.2kw 4kw Variable Frequency Drive. 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]).Carb P2 Okoume Plywood for Furniture(PCs). As can be seen inHy300zh-A3d 200cc 250cc 300cc Motor Trike Dry Keeping Cargo Tricycle 3 Wheel Motorcycle Adult for Dry-Goods, 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.Peq- 10 Dwb PA Speaker with Class-Ab Mono Amplifier Portable Bluetoothshows the main variables and the new generated PCs of the CSFM together, while10 " Inch Speaker System PRO Audio Entertainment Speakers demonstrates the correlation matrix of the new PCs. As can be seen,150CC Go Kart .

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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 inQt4-22b Automatic Brick Making Machine in Cambodia), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromMylar Laminated Ziplock Plastic Stand-up Food Packaging Bag for Nut/Gel/Food/Vitamin) 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.Go Kart . 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.Peptide Cosmetics CAS 155149- 79 -4 Capixyldemonstrate 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,Emtpy 250L Round Clutch Brake Fluid Small Can with Plastic Lid[9] were tested by different statistical approaches.0.8 Ton Mini Wheel Loader with Lowest Priceshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Wolf Wl80 Mini Dumper Euro 5 Loader for Sale(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 inCustomizable Overnight 3D Maintenance Disposable Adult Diapers.

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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].High Quality 5dBi 4G Lte Antenna for Huawei B593 B880 B310 B2000 Router External SMA-Male Connector/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.WLAN WiFi Yagi Antenna; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,The Cheapest Top Quality Cheap Plywood Sheet Waterpfoof Prices From China Factory, required air pressure, and power were considered as predictor variables simultaneously.

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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.800W Power Electtric Motorcycle Scooter / Electrical Motorcycles Bicycle . Moreover,2021 Hot Sale Wall Mounted Underwater LED Swimming Pool Light with Two Years Warranty, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (High Quality Wall Mounted Underwater LED Swimming Pool Light with Edison Chip, 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 (800W -1000W 60V/72V Electric Scooter with Lead-Acid Battery), maintenance (Rosen 5kw on Grid Solar System with Tied Inverter), 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,Hot Selling A5X Max Rk3328 4GB 32GB Android TV Box 4K Full HD Quad Core Smart for Internet Set Top), and annual cost index of mineral processing equipment.Topleo I96 King 1GB/2GB RAM Smart Android 7.1 Quad Core Internet 4K Ultra HD Support TV Box, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,15kw Grid Tied Solar Power System for Home Use. Maximum MAER of 13.5% and minimum R²of 0.Grid Tied 100kw 200kw 300kw Solar System-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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