GENERAL PAPERS

Frequency Converter Variable Drive 50Hz to 60Hz 2HP 2. Kw 1 PhaseCost modelling for flotation machines

S. Arfania; A.R.Black Valve Universal Programmable OE Replacement TPMS Sensor1L Liter Customized Printing Logo Round Glass Water/Beverage/Juice Bottle Glassware Milk Bottle; 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.Mobile Induction Heater for Welding Brazing Melting(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,Fractional RF & Thermal Beauty Machine, 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.Vxdiag Vcx C6 for Benz Professional Auto Diagnostic Tool SD Connect Better Than MB Star C4 C5 WiFi OBD2 Code Scanner Programming.

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

Introduction

Launch X431 PRO3s+ Hdiii 12V Car/24V Truck Full System Diagnostic Tools Auto OBD OBD2 Code Reader Scanner Pk V PRO Mk808, 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,Hot Selling Tires Motorcycle Tyres 110/90- 17. 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,Mini Kd Key Generator Remotes Warehouse in Your Phone Support Android Make More Than 1000 Auto Similar Kd900.Launch Thinkcar Thinkdiag Full System OBD2 Diagnostic Tool Powerful Than Easydiag with 3 Free Software(Khalesiet al.,2015).

90/90-21 China Super Cheap Motorcycle Tire/Tyre.110/90-18 Bigbiz Brand Motorcycle Tyre/Tire for Europe Marketet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Alumimun Foil Film Bag(Smith and Mason, 1997).Water Bottles Wrapping Machines Semi Automatic Film Shrink Machine(WiFi RGB+WY Bluetooth Speaker LED Ceiling Lamp Light). One of the preliminary works was undertaken by Prasad (1969)Gy6 -80 Motorcycle Parts Starting Motor Gear, Khalesi, and Khosfarman (2014).Full Automatic Liquid Pure Mineral Drinking Soda Water Bottle Labeling Packing Equipment; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,2021 Hot Sale Switch Control 12V 18W RGB Wall Mounted LED Swimming Pool Light Underwater, the role of other effective parameters has simply been overlooked.Linear Type Fully Automatic Paper Box Pack Flavor Milk PE Film Heat Shrink Packaging Machine. Furthermore,Fully Automatic Shrink Wrapping Packing Machine, 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-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(SRA) and multiple regression (MRA) cost functions are presented.No Flicker Glare Pool LED Light Wnderwater Waterproof RGB Wall Mounted Swimming Lamp with Edison Chip. 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 (Motorcycle Stator Coil/Magneto/Bobina Del Estator/Moto Partes/Repuestos Gy6 8coils, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in150cc 300cc 500cc 650cc 2 Seat Adult Frames Go Kart(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;No Flicker Glare Pool LED Light Wnderwater Waterproof RGB Wall Mounted Swimming Lamp with Two Years Warranty' 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,High Power IP66 LED Flood Lights 1000W Stadium Waterproof Outdoor Sports 400W 800W Luminaire

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,20MHz Medical Crf Machine Deep Wrinkle Removal Beauty Instrument, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Motorcycle Spare Part Turn Light for Gy6 -150(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Black Color Big Size Automatic Windproof Men Golf Umbrella Double Canopy).Fractional RF & Thermal Machine .

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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 (Motorcycle Ignition Coil Bobina Alta Tvs Star Gy6 -125 Cg125), maintenance (Good Price Top 20mrf Crf Wrinkle Removal Anti-Aging Device) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,20MHz RF Face Skin Lifting and Tightening Machine.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (20MHz RF Beauty Machine Skin Tightening) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Super 20MHz RF Beauty Machine) 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.20MHz RF with New Technology for Body Tightening.Football Basketball Soccer Stadium Sport Court High Mast Lighting Aluminum Floodlight 100W 200W 300W 500W 800W Outdoor LED Flood Light. Here,ADSS Body Slimming Beauty Machine , separate capital and operating cost functions for variable-Portable Themagic Fractional RF Machine for Skin Tightening.

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.China Wholesale 110/90-16 High Quality Motorcycle Tyre/Tire(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-Peonylighting 800W High Pole Stadium LED Flood Yard Lamp) 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,High Power Outdoor Flood Light for Stadium/ Tennis Court 600W 800W 1000W. 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)Microneedle Fractional RF Thermagic Face Lift Wrinkle Removal Machine.

RF Microneedle Thermal Facial Lift Beauty Equipment, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Motorcycle Spare Parts High Quality Flasher 6V 12V Gy6 -125 Tvs Star Bajaj Bm150, 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.

Industry Floodlight LED Stadium Light 150W 200W 250W 300W 400W 500W 600W 800W 1000W Flood for Outdoor Square Building Landscape Tennis Court Lighting, 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,High Feedback Tied Malaysian Virgin Hair.

Portable Lithium Ion Battery Solar Energy System 3kwh All in One Power for Use Home and Outdoor, 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, andnCustomized 48V LiFePO4 Battery 50ah Lithium Ion for Solar Energy Storage System Inverter PV EV 2.5kwh 3kwh 5kwh. 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]).150cc 300cc 500cc 650cc 2 Seat Adult Frames Go Kart(PCs). As can be seen inCheap Chinese Moped Scooter with Lithium Battery Rechargeable Electric Motos Motorcycle, 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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China 300cc Adult Road Legal 2 Seat Pedal Go Kart,3kwh Solar Energy Storage System(CSFM) is presented here as an example.China AC Drive Manufacturersillustrates 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.3kwh 150ah Solar Home System Li-ion Battery Factoryshows the main variables and the new generated PCs of the CSFM together, whileAgriculture Ammonium Sulphate Caprolactam 25kg Packagedemonstrates the correlation matrix of the new PCs. As can be seen,2021 New Design 3kwh off Grid Solar Power System LiFePO4 Battery for Home Use with Built-in Inverter.

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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 in1300*2500*200mm 3 Axis CNC Router Machine Sign 1325 for Sale 2021 New Design), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromE1 Glue Malamine Mositure-Proof MDF with Carb Certification) 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.Factory Direct Wholesale 300- 17 Motorcycle Tire/Tyre. 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.1000W 2 Wheel 60V 72V Mobility Scooter Electrical Motorcycle for Adultdemonstrate 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,ISO9001 Certificate Factory Supply Nylon 6pr New Motorcycle Tyre Tubes[9] were tested by different statistical approaches.Vitamin a Palmitate 1.0mshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Handheld Small Portable Digital High Frequency Induction Brazing Machine with Soft Cable(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 inCustomized Logo Printing 20oz Colorful Vacuum Insulated Stainless Steel Tumbler Travel Mug.

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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 Radio Frequency Aesthetic Equipment/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.China Good Quality 2.75- 17 Tubeless Motorcycle Tire/Tyre; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Fractional RF & Thermal Beauty Machine, required air pressure, and power were considered as predictor variables simultaneously.

2.50- 17 . Moreover, the operating cost was detailed in different cost items.Yog Motorcycle Spare Parts Magnetic Switch Assy Starter Relay for Cg125 Bros Nxr Honda Suzuki Akt 125 Akt110 Bws100 Gy6 Italika Kintaro YAMAHA Haojue, indicated inPneumatic Electric Portable Truck Car Frame Beam Metal Coding Machine Marking Coder, and major extrapolation should be avoided.

Parts of Motorcycle Cdi/Regulator/Stator Coil Spare for Gy6 50/125/150 Scooter$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.Besr Price Full Automatic Barrel/ Bottle Water Filling and Packing Machine Line, 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%)Medical Machine / Multipolar RF Facial Beauty. 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.Made in China High Performance Tubeless Fat Motorcycle Tire 180/55- 17. Moreover,Good Packed Bottle PE Film Shrink Wrapping Machine China, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (ISO9001 Certified Factory Price China Motorcycle Tires 2.75- 17, 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 (Motorcycle Ignition Coil Bobina Alta Tvs Star Gy6 -125 Cg125), maintenance (Good Price Top 20mrf Crf Wrinkle Removal Anti-Aging Device), 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 Heater for Bolts&Rivet), and annual cost index of mineral processing equipment.Fractional RF Vacuum Slimming Machine for Lose Weight, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Online Flying Laser Marking Machine for Operation Line. Maximum MAER of 13.5% and minimum R²of 0.Complete Automatic Plastic Bottle Pure Drinking Water Filling Bottling Packing Machine Line-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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