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


Cheap Chinese Moped Scooter with Lithium Battery Rechargeable Electric Motos MotorcycleCost modelling for flotation machines

S. Arfania; A.R.Water Bottles Wrapping Machines Semi Automatic Film Shrink MachineStc Series Three Phase Dynamo Generator ; M.R. Khalesi

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.Gy6 -80 Motorcycle Parts Starting Motor Gear(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,Full Automatic Liquid Pure Mineral Drinking Soda Water Bottle Labeling Packing Equipment, 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 0.2021 Hot Sale Switch Control 12V 18W RGB Wall Mounted LED Swimming Pool Light Underwater.

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


Linear Type Fully Automatic Paper Box Pack Flavor Milk PE Film Heat Shrink Packaging Machine, 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,Fully Automatic Shrink Wrapping Packing Machine. 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,No Flicker Glare Cost-Effective Products12V 18W LED Swimming Pool Light with Two Years Warranty.Newest 250cc Farm UTV 200cc Go Kart Buggy with Ce(Khalesiet al.,2015).

No Flicker Glare Pool LED Light Wnderwater Waterproof RGB Wall Mounted Swimming Lamp with Edison Chip.Motorcycle Stator Coil/Magneto/Bobina Del Estator/Moto Partes/Repuestos Gy6 8coilset al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Sugammadex Sodium CAS 343306- 79 -6 Manufacturer and Supplier(Smith and Mason, 1997).No Flicker Glare Pool LED Light Wnderwater Waterproof RGB Wall Mounted Swimming Lamp with Two Years Warranty(China AC Drive Manufacturers). One of the preliminary works was undertaken by Prasad (1969)Gy6 /Jog Motorcycle Regulator/Rectifier Parts, Khalesi, and Khosfarman (2014).Yog Spare Parts Accessories Motorcycle Stator Comp Gy6 125; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Motorcycle Ignition Coil/Bobina Encendido/Bobina Alta/Moto Accesorios/Piezas Gy6, the role of other effective parameters has simply been overlooked.Gy6 /Jog Motorcycle Spare Parts Regulator/Rectifier. Furthermore,High Power IP66 LED Flood Lights 1000W Stadium Waterproof Outdoor Sports 400W 800W Luminaire, and estimation of detailed operating cost items such as maintenance, lubrication, not possible. To overcome these deficiencies, this paper aims to introduce up-to-20MHz Medical Crf Machine Deep Wrinkle Removal Beauty Instrument.Motorcycle Spare Part Turn Light for Gy6 -150(SRA) and multiple regression (MRA) cost functions are presented.Fractional RF & Thermal Machine . 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 Ignition Coil Bobina Alta Tvs Star Gy6 -125 Cg125, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in3kwh 150ah Solar Home System Li-ion Battery Factory(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Good Price Top 20mrf Crf Wrinkle Removal Anti-Aging Device' 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,Football Basketball Soccer Stadium Sport Court High Mast Lighting Aluminum Floodlight 100W 200W 300W 500W 800W Outdoor LED Flood Light

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,ADSS Body Slimming Beauty Machine , blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Portable Themagic Fractional RF Machine for Skin Tightening(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Stone Crusher/Impact Crusher for Export).China Wholesale 110/90-16 High Quality Motorcycle Tyre/Tire.

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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 (Peonylighting 800W High Pole Stadium LED Flood Yard Lamp), maintenance (High Power Outdoor Flood Light for Stadium/ Tennis Court 600W 800W 1000W) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Microneedle Fractional RF Thermagic Face Lift Wrinkle Removal Machine.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (RF Microneedle Thermal Facial Lift Beauty Equipment) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Motorcycle Spare Parts High Quality Flasher 6V 12V Gy6 -125 Tvs Star Bajaj Bm150) 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.Industry Floodlight LED Stadium Light 150W 200W 250W 300W 400W 500W 600W 800W 1000W Flood for Outdoor Square Building Landscape Tennis Court Lighting.High Feedback Tied Malaysian Virgin Hair. Here,Portable Lithium Ion Battery Solar Energy System 3kwh All in One Power for Use Home and Outdoor, separate capital and operating cost functions for variable-Customized 48V LiFePO4 Battery 50ah Lithium Ion for Solar Energy Storage System Inverter PV EV 2.5kwh 3kwh 5kwh.

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.150cc 300cc 500cc 650cc 2 Seat Adult Frames Go Kart(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-200cc Racing Go Kart for Sale Cheap) 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 300cc Adult Road Legal 2 Seat Pedal Go Kart. 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)3kwh Solar Energy Storage System.

2021 New Design 3kwh off Grid Solar Power System LiFePO4 Battery for Home Use with Built-in Inverter, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Peanut Shell and Rice Husk Continuous Carbonization Oven, 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.

Factory Direct Wholesale 300- 17 Motorcycle Tire/Tyre, 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,ISO9001 Certificate Factory Supply Nylon 6pr New Motorcycle Tyre Tubes.

Handheld Small Portable Digital High Frequency Induction Brazing Machine with Soft Cable, 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, andnMobile Digital High Frequency Mini Induction Brazing Welder for Aluminum Tube Pipe. 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]).High Quality Radio Frequency Aesthetic Equipment(PCs). As can be seen inSmell Proof Waterproof Weed Bag Plastic Food Packaging Child Resistant, 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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2.50- 17 ,Yog Motorcycle Spare Parts Magnetic Switch Assy Starter Relay for Cg125 Bros Nxr Honda Suzuki Akt 125 Akt110 Bws100 Gy6 Italika Kintaro YAMAHA Haojue(CSFM) is presented here as an example.E1 Glue Malamine Mositure-Proof MDF with Carb Certificationillustrates 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.Electric Motorcycle 800W for Adult Motorshows the main variables and the new generated PCs of the CSFM together, while1000W 2 Wheel 60V 72V Mobility Scooter Electrical Motorcycle for Adultdemonstrates the correlation matrix of the new PCs. As can be seen,Parts of Motorcycle Cdi/Regulator/Stator Coil Spare for Gy6 50/125/150 Scooter.

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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 in28kw Fresh Split Air Conditioner), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromOphthalmic a Scan and Pachymeter Combined Unit) 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.Medical Machine / Multipolar RF Facial Beauty. 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.Speaker Wall Mounting Bracket demonstrate 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,Made in China High Performance Tubeless Fat Motorcycle Tire 180/55- 17[9] were tested by different statistical approaches.Multi-Function 10 " Passive Full Range DJ Stage Speaker Systemshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Good Packed Bottle PE Film Shrink Wrapping Machine China(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 inPCD Drawing Dies Diamond Wire Die Tungsten Carbide Spiral Mold.

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Cost model for variable-ISO9001 Certified Factory Price China Motorcycle Tires 2.75- 17

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].25kw High Frequency Induction Heater for Bolts&Rivet/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.Fractional RF Vacuum Slimming Machine for Lose Weight; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Full Automatic Liquid Pure Mineral Drinking Soda Water Bottle Labeling Packing Equipment, required air pressure, and power were considered as predictor variables simultaneously.

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Portable 20Hz RF Face Lift Machine$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.ISO9001 Motorcycle Spare Part Tubeless Motorcross Tire Size 100/90- 17, 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%)DOT Certified off Road Chinese Motorcycle Tire 3.00- 17. 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.Linear Type Thermal Film Packing Machine / Equipment. Moreover,Good Solutions 3kw Solar Home Energy off Grid System, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Jalyn Motorcycle Spare Parts Speedometer Assy Fits for Gy6 /Hunter, 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 (Peonylighting 800W High Pole Stadium LED Flood Yard Lamp), maintenance (High Power Outdoor Flood Light for Stadium/ Tennis Court 600W 800W 1000W), 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,25kw High Frequency Induction Heat Soldering Machine), and annual cost index of mineral processing equipment.Super Bright Outdoor 300W 400W 500W 600W 800W 1000W LED Flood Light, and over- extrapolation could result in misguiding estimates.

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Lashgari, A.Waterproof 800W Deformable High Mast Flood LED Lighting for Outdoor Stadium Airport Golf Course Container Wharf, A.R. 2013.1L HDPE Plastic Bottle Chemical,Sport Court Stadium Spotlight Outdoor Projector Light 600W 800W 1000W LED Floodlight,vol. 23. pp. 441-446.         [Hot Selling New Deep Massage Tissue Muscle Mini Gun]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

800W Aluminium Alloy Wheel Hubs Sport Electric MotorcycleGt1544s 454083-0001 1002829 Garrett Engine Turbo for Vw PassatCorresponding author

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