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S. Arfania; A.R.MPPT Function Variable Frequency Drive Motor Controller Power Supply GeneratorDJ Stage PRO Audio Indoor Club 15" Line Array Loudspeaker; 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.0.75kw-11kw Three Phase 380V Frequency Inverter VFD(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,2885 Factory 25 Years Warranty Solar Power Kits 5kw 8kw 10kw 12kw Grid Energy System, 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 0.2876 10kw Home Used Solar Power System on Grid Roof.

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

Introduction

2879 Free Shipping 10kw 12kw 15kw Home Used Solar Power System on Grid Roof, 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,AAA Grade 0.9mm Poplar Core/Veneer for Plywood/Furniture. 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,Radiate Pine Face Veneer.Grade AA Veneer Furniture Building Material Plywood to Dubai(Khalesiet al.,2015).

1L Wholesale Round Tin Can for Paint/Engine Oil with Tight Lid.Manufacturer of Enigine Oil Canet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Disperse Dyestuff Violet S3rl 200% C. I. 63(Smith and Mason, 1997).Small Wheel Loader Wl80 800kg Loaders for Farm Work(Best Quality BMK Glycidate Raw Materials Fororganic Intermediates Bulk Price). One of the preliminary works was undertaken by Prasad (1969)1L Tin Can for Camellia Oil , Khalesi, and Khosfarman (2014).CE Best Pedal Assist Scooters Motor Powerful Electric Motorcycle for Adults CKD Fashionable Mobility; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Mxq 4K PRO Allwinner H3 Quad 7.1 1GB RAM 8GB ROM H. 265 3D Android Media TV Box, the role of other effective parameters has simply been overlooked.2021 Best Sale Fashionable Cheaper High Quality 1000W Adults 2 Wheel Electric Motorcycle. Furthermore,Set Top Box T95q S905X2 4G 32g Android 9.0 HD TV Kodi Quad Core, 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-Hot Popular Fast Shipping H. 265 Standars Czech Republic Channels Internet TV Box.Junuo China Factory Mini Plastic E Digital Internet TV Set Top Box DVB T2 for Russia(SRA) and multiple regression (MRA) cost functions are presented.5 Litre Extra Olive Oil Tin Can . 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 (DC/AC Frequency Inverter Solar Pump Power 400-600V Input 2.2kw, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in800W 72V China Electric Tricycle for Handicapped(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Frequency Converterlow Industrial Power Inverter' 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,Low Price B/C/D/E Grade Wood/Natural Birch Veneer

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Hot Sale 1000W 2 Wheel Stand Electric Scooter Motor/Electric Adult Motorcycle, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Solar Pump Inverter Price Quality AC Drive Frequency Converter(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Hot Sales RGB Color by Phone APP Bluetooth Control LED Fog Light DRL Daytime Running).Good Quality Pine Wood Core Block Board with Okume Film.

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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 (Hot Good Bulk Quality 60V800W20ah Electric Motor Scooter for Ladies), maintenance (Al-Gw6 Fast Electric Motorcycle Speed 60km/H Kits) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Titan Chargeuses Cheap Small Log China Mini Digger Loader with European Quick Hitch.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Chinese Factory Direct Supply Lithium Battery Electric Scooter LCD Display Motorcycle E-Scooter) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Cheap Chinese Moped Scooter with Lithium Battery Rechargeable Electric Motos Motorcycle) 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.2021 Wuxi Best Selling New Type Racing Mobility Adults 2 Wheels Electric Motorcycles E Motos CKD Scooters.Grid Tied Solar Energy System 5kw 10kw 20kw 50kw 100kw 200kw 300kw 500kw. Here,2021 Hot Selling Two Wheel Cheap Powerful Electric Moped Motorcycles with Pedals Chinese Supply CKD Scooter, separate capital and operating cost functions for variable-Titan OEM New Type Qingzhou Loadefr Factory RC Avant Mini Wheel Loaders with Ce.

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.Zl08 0.8 Ton Garden Tractor Pay Loader 800kg Mini(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-Titan Mini Loader 800kg New Front End Radloader with Spare Parts Best Shipping Agent Service) 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,Wolf Shovel Loader E5 for Agriculture Work. 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)Fast Delivery 2 Wheel Lithium Battery Electric Bike Lady Bicycle Motorcycle in Stock.

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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.

Agricultural Machine Small Wheel Loader Mini780 with CE Certificate, 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,Cheap Price Zl08 0.8ton China Mini Articulated Hydraulic Front End Tractor Loaders.

Zl08f 0.8ton China Cheap Price Articulated Tractor Front Wheel Loader, 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, andnFactory Price Zl08 Mini Articulated Hydraulic Front End Farm Wheel Loader. 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]).Factory Supply OEM Support Mxq PRO Rockchip Rk3229 Android 7.1 TV Box(PCs). As can be seen in4-Chloro-4'-Methylbenzophenone High Quality Products CAS 5395- 79 -9, 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.Factory Nitrogen Fertilizer Ammonium Sulphate 20.5%N Steel Grade for Agricultureshows the main variables and the new generated PCs of the CSFM together, whileDual 10 " Outdoor Wooden PA System Bluetooth Trolley Smart Speakerdemonstrates the correlation matrix of the new PCs. As can be seen,15mm Pine Wood Core Block Board for Construction.

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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 inReactor Pumps), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromLarge Size Spherical Roller Bearing 239/600 239/630 239/670 239/ 710 Ca Cc MB Cage Self-Aligning) 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.Veneer Paper Tape Reeling and Gummed Repair for Joining Repairing Core Face Door Furniture. 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.Professional 10 Inches Rcf Aluminum PA Speaker Framedemonstrate 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,982 High Efficiency up to 99% on Grid Solar System 50kw Plants for Large Scale Commercial[9] were tested by different statistical approaches.0.8ton Zl08f Small Wheel Loadershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.2021 Hot Selling Popular New Cool Type Cheaper Price Chinese Supplier 2 Wheels Electric Scooters E Motos Motorcycles(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 Natural White Quartize Slab for Wall/Floor.

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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].5 Liter Paint Tin Can with Customized Printing Plastic Handle/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.2 Liter Square Small Metal Tin Can for Paint with Handle and Lid; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,2885 Factory 25 Years Warranty Solar Power Kits 5kw 8kw 10kw 12kw Grid Energy System, required air pressure, and power were considered as predictor variables simultaneously.

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HK1 Smart TV Box Amlogic S905W Android 7.1 Quad Core 2GB 16GB$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.Innopack 5L Paint Engine Oil Tin Can with Plastic Handle, 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%)Innopack Food Grade Metal Tin Can for Edible Cooking Oil in Low Price. 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.Cheapest Price Mxq PRO Rk3229 4K Android TV Box 1GB 8GB Smart Set Top Download User Manual Firmware Update Wholesale Model. Moreover,Table PC Pipo X9s TV Box Win10 Mini Z8350 Chipset Digital Receiver Smart, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Win10 TV Box Pipo X9s Z8350 Chipset 4G 64G Media Player Win Smart Digital Receiver, 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 (Hot Good Bulk Quality 60V800W20ah Electric Motor Scooter for Ladies), maintenance (Al-Gw6 Fast Electric Motorcycle Speed 60km/H Kits), 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,Variable Speed Inverter China Frequency Converter AC), and annual cost index of mineral processing equipment.Natural Material Veneer Hand Made Woven for Wall Decoration, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,458 Alicosolar High Efficiency 10kw on Grid Solar System Kit Home with CE/TUV/ISO for Use. Maximum MAER of 13.5% and minimum R²of 0.5kw Single Phase Home Grid Tied Solar Power System-feasibility and even feasibility study level of projects.

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Mular, A.L. 1982.Three Phase 220V Frequency Converter with Vector Control.China Frequency Converter Variable Speed Drive.2021 Big Promotion Product Adult 1200W Electric Bike Motorcycle Without Pedals, Montreal. 265 pp.         [5GHz 27dBi Enclosure WiFi Antenna]

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Everun Er408 800kg Construction Equipment Compact Mini Wheel Loader with Bucket, Ar., Lashgari, A., Fouladgar, M.M., and Skibniewski, M.J. 2012. Estimating capital and operational costs of backhoe shovels.Journal of Civil Engineering and Management,vol. 18, no. 3. pp 378-385.         [Sterling Silver Brooch]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Low Frequency Inverter AC Drive6speed 20inch Wheel Aluminum Alloy Folding Mountain BikeCorresponding author