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J. S. Afr. Inst. Min. Metall. vol.117 n.1 Johannesburg Jan. 2017Â


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Tarbiat Modares University, Iran


Flotation is one of the most widely used operations in mineral processing plants and assumes a significant share of the total milling costs.50cc EEC Motorcycle Scooter Efi Moped(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,3 Seats 3000W 4 Wheel Mobility Disabled EEC/Coc Electric Mini Car with 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 0.50cc/125cc Euro 5 Certificate Gas Scooter Motorcycle Moped Efi .

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


Zhenhua New T5 300cc Motorcycle Efi, 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,EEC Efi Racing Motorbike Motorcycles 125cc. 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,Motorbicycle with Efi Fuel Supply and Steel Tube Frame.High Speed Kawasaki Ninja Motorcycle 250cc(Khalesiet al.,2015).

Mini Nameplate Pneumatic Engraving Machine.Electric Smart Cargo Car Tricycle 800W 40km/H Long Running Rangeet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Motorcycle Tires/Motorcycle Tyre/Tire 2.50- 17 2.50-18 2.75- 2.75-18(Smith and Mason, 1997).Mini electric truck/ express vehicle/ Express vehicles(24V 40ah Lithium Iron Battery for Electric Bike). One of the preliminary works was undertaken by Prasad (1969)Bost Motorcycle Parts Accessories Air Filter for 2-Wheel 4-Stroke Gy6 -125 -150 Bikes, Khalesi, and Khosfarman (2014).BAW Made of Electric Car with Lithium Battery; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,EEC L2e 1500W 3 Wheel Enclosed Electric Cabin Scooter, the role of other effective parameters has simply been overlooked.M7 Model LHD&Rhd EV with Solar Panel Pure Electric Car. Furthermore,50cc Monkey Bike Gasoline Motorcycle Euro4 Efi, and estimation of detailed operating cost items such as maintenance, lubrication, not possible. To overcome these deficiencies, this paper aims to introduce up-to-4x2 electric pickup truck/ Electric vehicle/ car.Electric 4 Wheelers Cars 800W 50km/H Mini Old Man Tricycle (SRA) and multiple regression (MRA) cost functions are presented.2021 New Products Motor Power 800W Electric Trolley Tractor. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.



Thirty-seven major flotation machines (Motorcycle Scooter Front Clutch Assembly Compatible with Gy6 -50 Engines, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inL18 /86131 Falante Professional 18inch Subwoofer 700W New Product China Supplier Hot Sale(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;1L Tin Can with Metal Cap for Food Storage' 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,1L Cone Top Tin Can with Screw Cap

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Gy6 -125 Motorcycle Spark Plug Cap Parts, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Mining Cement Stainless Steel 316L Protective Pressure Sensor(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Hot Sale! Iron Oxide Red 130 with High Performance).Scooter Parts.

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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 (Scooter Parts Engine Gy6 -125 150cc Driven Clutch Assembly Manufacturer Price), maintenance (Cheap 20W Fiber Laser Color Metal Marking Marker Machine Price) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Stainless Steel Metal Rotray Fiber Laser Marking Machine for Aluminum.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Flexible Label Laser Marking Machine for Automotive) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (CATV Indoor Amplifier 8200) 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.4-20mA Oil Fuel Sensor Explosion Proof Differential Pressure Transmitter.Softel 3ru CATV 24 Way Fixed-Channel Analog Modulator. Here,Metal Fiber Ring Color Laser Engraving Machine, separate capital and operating cost functions for variable-Perfect Laser Rotary DOT Peen Marker 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.0-5V 0-10V Raw Petro High Temperature Sapphire Pressure Transducer(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-Hot Sells Solar Power System for Home 3kwh with Both AC&DC Output) 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,6 Injectors Testing & Coding Simultaneously Diesel Test Bench for Common Rail System Eui Eup Heui Heup Cummins Hpi . 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)110/90- 17 Used Tubeless Second Hnad Motor Tire/Tyre.

3kwh LiFePO4 Battery with 5 Years Warranty, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Anti Explosion High Stability Sealed Pressure Sensor, Khalesi, and Khosfarman, 2014).

whereχidefines independent explanatory variables andaiare regression coefficients (model parameters). As was mentioned, independency ofxivariables 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.

Best Price 2021 New Product 3kwh Home Solar System for Outdoor Use, 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]:

whereXobsis the observed value,xethe estimated value at time/placeI,and n,Screw Compressor Low Cost Small Type Pressure Sensor.

Solar Energy Storage System Built-in Inverter, 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).

whereCeis the estimated cost,Cathe actual cost, andn4-20mA Diffused Silicon Micro Size Hygienic Pressure Transducer. 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]).Lithium Battery 200ah LiFePO4 Pack 3kwh(PCs). As can be seen inSafe Delivery CAS 49851-31-2 / 2-Bromovalerophenone Yellow Liquid and 1009-14-9, 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 andXias Equations [5] and [6]:

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In this research, main variables ofX1, X2... Xnwere 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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45kw Mf Induction Heating Machine Heater,Ytd-Dih25 IGBT Automatic Induction Heating Machine(CSFM) is presented here as an example.Airtight Child Pop up Squeeze Plastic Stand Flat Bottom Pet Cat Food 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.RGB/White 18W PAR56 LED Swimming Pool Lightshows the main variables and the new generated PCs of the CSFM together, while1kw Solar Power System Grid Tied 1000W on Panel Pricedemonstrates the correlation matrix of the new PCs. As can be seen,Solar Battery Solutions 3kwh Lithium LiFePO4 Hybrid System.

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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)

whereXiare main technical variables (like power or required air),aiare calculated by multiplication of coefficients of the model based on PCs as predictors by the eigenvectors of PCs (as illustrated in400g Halal Biscuit Cheap Biscuits Original Caramel Flavor), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found from20/30/50/60/100W Raycus Max Jpt Ipg Table 3D CO2 Mopa Color Logo Printer Marker Fiber Laser Marking Machine) 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.Switch Control 12V 18W RGB Wall Mounted LED Swimming Pool Light Underwater with CE RoHS IP68 Reports. 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 All Weather Water-Proof Indoor Outdoor 4inch Speakerdemonstrate 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,316L Ceramic Pressure Transducer for Health Care Industry[9] were tested by different statistical approaches.Professional Outdoor Speaker All Weather Water-Proof Humidity Proof Functions Two Ways with Mq6tp190801shows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Factory Wholesale Price Industrial Induction Vacuum Furnace(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 inFactory Custom Creation Plastic Flashlight Key Chain Promotion 3D Mini Camera LED Light Keychain.

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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].Water Transmitter Diffused Silicon Level Sensor for Fluid/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.


Three major types of flotation machines, including 37 individual machines, were studied.Digital Display Hygienic Pressure Indicator Transmitter; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,3 Seats 3000W 4 Wheel Mobility Disabled EEC/Coc Electric Mini Car with Lithium Battery, required air pressure, and power were considered as predictor variables simultaneously.

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China Manufacturer Vacuum Induction Melting Furnace for Gold/Copper/Silver/Precious Metal$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.Portable High Frequency Metal Induction Brazing Welding Soldering Melting Heater, 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%)Motorcycle Tires/Motorcycle Tyre/Tire 2.50- 17 2.50-18 2.75- 2.75-18. In the MRA cases, this property is owed to the SFM (3.05%).


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.Black Valve Universal Programmable OE Replacement TPMS Sensor. Moreover,Mobile Induction Heater for Welding Brazing Melting, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Fractional RF & Thermal Beauty 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 (Scooter Parts Engine Gy6 -125 150cc Driven Clutch Assembly Manufacturer Price), maintenance (Cheap 20W Fiber Laser Color Metal Marking Marker Machine Price), 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,Vxdiag Vcx C6 for Benz Professional Auto Diagnostic Tool SD Connect Better Than MB Star C4 C5 WiFi OBD2 Code Scanner Programming), and annual cost index of mineral processing equipment.Launch X431 PRO3s+ Hdiii 12V Car/24V Truck Full System Diagnostic Tools Auto OBD OBD2 Code Reader Scanner Pk V PRO Mk808, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,Hot Selling Tires Motorcycle Tyres 110/90- 17. Maximum MAER of 13.5% and minimum R2of 0.Mini Kd Key Generator Remotes Warehouse in Your Phone Support Android Make More Than 1000 Auto Similar Kd900-feasibility and even feasibility study level of projects.


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Huang, X. X., Newnes, L. B., and Parry, G.C. 2012. The adaptation of product cost estimation techniques to estimate the cost of service.International Journal of Computer Integrated Manufacturing,vol. 25, no. 4-5. pp. 417-431.         [Hospital Grade Antibacteria 75% Alcohol Gel Water Free 500ml Hand Sanitiser]

INFOMINE. 2013. Mine and mill equipment costs. InfoMine USA, Inc. CostMine Division and Aventurine Engineering, Inc.         [800w /1100w EEC Electric Scooter ]

Kaiser, H.F. 1960. The application of electronic computers to factor analysis.Educational and Psychological Measurement,vol. 20. pp. 141-151.         [Diesel Engine Parts Fuel Injection Nozzle Dlla150sm105]

Khalesi, M. R., Zarei, M. J.,Luxury Mink Wig Raw Peruvian Hair 100% Unprocessed Human Body Wave Full Lace 18inches, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-110/90-18 Bigbiz Brand Motorcycle Tyre/Tire for Europe Market.Minerals Engineering,vol. 81. pp. 103-108.         [Ihi Turbocharger 2001-04 Peugeot]

Kim, G.H., An, S.H., and Kang, K.I. 2004.Water Bottles Wrapping Machines Semi Automatic Film Shrink Machine, neural networks, and case-based reasoning.Building and Environment,vol. 39, no. 10. pp. 1235-1242.         [Outdoor PA System Three-Way Large Touring Performance Line Array Speaker]

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Mcnab, B., Jancovic, A., David, D., and Payne, P. 2009. Processing of magnetite iron ores-comparing grinding options.Proceedings of the AusIMM Iron Ore Conference,Perth, WA, 27-29 July 2009.         [Double 12" 3-Way Line Array PA Speaker]

Mohutsiwa, M. and Musingwini, C. 2015. Parametric estimation of capital costs for establishing a coal mine: South Africa case study.Linear Type Fully Automatic Paper Box Pack Flavor Milk PE Film Heat Shrink Packaging Machine,vol. 115. pp. 789-797.         [L-Guard Wheel Loader L-5 OTR 45/65-45 Cheap Wholesale Tyres]

Montgomery, D.C. and Runger, G.C. 2003. Applied Statistics and Probability for Engineers. 3rd edn. Arizona State University.         [Grid Tied Microinverter 1200W Waterproof Pure Sine Wave with WiFi Monitoring]

Mular, A.L. 1978. Mineral Processing Equipment Costs and Preliminary Capital Cost Estimations. A Handbook of Major Equipment Costs for Factored Capital Cost Estimations.Fully Automatic Shrink Wrapping Packing Machine, Montreal. vol.13. 166 pp.         [200kVA/160kw Power Generator Powered by Diesel Engine Genset]

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Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.Gy6 /Jog Motorcycle Regulator/Rectifier Parts.Journal of Manufacturing Science and Engineering,vol. 128. pp. 563-575.         [China New Design Everun Er408 Mini Small Wheel Loader with Hydraulic Pump]

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Prasad, L. 1969.Motorcycle Spare Part Turn Light for Gy6 -150.Fractional RF & Thermal Machine , Metallurgy and Petroleum, Montreal. pp. 3-15.         [Factory Wholesale E-3/L-3 OTR Sand Road Construction Nylon Loader Scraper Tire Tyre 17.5-25]

Anti Explosion High Stability Sealed Pressure Sensor, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Motorcycle Ignition Coil Bobina Alta Tvs Star Gy6 -125 Cg125.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [Color Custom Diesel Engine with Four-Stroke for Gensets]

Anti Explosion High Stability Sealed Pressure Sensor, 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.         [Mini Bulk 500ml Bottle Antibacterial 75% Alcohol UK Instant Hand Sanitizer Gel]

Anti Explosion High Stability Sealed Pressure Sensor, A.R., Khalesi, M.R., and Khosfarman, M. 2014. A parametric cost model for mineral grinding mills.Minerals Engineering,vol. 55. pp. 96-102.         [PS10 Professional Sound System 10inch Audio Speaker Box]

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USBM. 1987.Good Price Top 20mrf Crf Wrinkle Removal Anti-Aging Device,20MHz RF Face Skin Lifting and Tightening Machine-metallic minerals expected fossil fuels in the United States and Canada.Openfile report10-87. US Bureau of Mines, Denver, CO. 134 pp.         [Access Control Garage Door Keypad Lock Waterproof IP68 Metal Case RFID 125kHz Single Stand - Alone with 2000 Users for Outdoor and Indoor]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Hyundai Excavator Hydraulic Cylinder Bucket Seal Kit for R210Triple Phase 380V 50Hz 60Hz 7kw AC Variable Frequency ConverterCorresponding author

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