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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.110/90- 17 Used Tubeless Second Hnad Motor Tire/Tyre(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,3kwh LiFePO4 Battery with 5 Years Warranty, 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.Anti Explosion High Stability Sealed Pressure Sensor.

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

Introduction

Best Price 2021 New Product 3kwh Home Solar System for Outdoor Use, 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,Screw Compressor Low Cost Small Type Pressure Sensor. 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,Solar Energy Storage System Built-in Inverter.4-20mA Diffused Silicon Micro Size Hygienic Pressure Transducer(Khalesiet al.,2015).

Lithium Battery 200ah LiFePO4 Pack 3kwh.Smokeless Rice Husk Continuous Carbonization Oven for Saleet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 2ND Generation Ultrasound Bone Densitometer(Smith and Mason, 1997).45kw Mf Induction Heating Machine Heater(Ihi Turbocharger 2001-04 Peugeot). One of the preliminary works was undertaken by Prasad (1969)Ytd-Dih25 IGBT Automatic Induction Heating Machine, Khalesi, and Khosfarman (2014).Solar Battery Solutions 3kwh Lithium LiFePO4 Hybrid System; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Water Treatment Anticorrosive Ceramic Capacitor Micro Pressure Transmitter, the role of other effective parameters has simply been overlooked.Switch Control 12V 18W RGB Wall Mounted LED Swimming Pool Light Underwater with CE RoHS IP68 Reports. Furthermore,316L Ceramic Pressure Transducer for Health Care Industry, 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-Factory Wholesale Price Industrial Induction Vacuum Furnace.Mini Size Water Differential Pressure Sensor for HVAC(SRA) and multiple regression (MRA) cost functions are presented.Water Transmitter Diffused Silicon Level Sensor for Fluid. 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 (Digital Display Hygienic Pressure Indicator Transmitter, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inOutdoor PA System Three-Way Large Touring Performance Line Array Speaker(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;High Stable Universal Pressure Transmitter' 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,Black Valve Universal Programmable OE Replacement TPMS Sensor

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Mobile Induction Heater for Welding Brazing Melting, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Fractional RF & Thermal Beauty Machine(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (7PCS Black Refit K5 Logo Custom ABS Plastic Emblem).Vxdiag Vcx C6 for Benz Professional Auto Diagnostic Tool SD Connect Better Than MB Star C4 C5 WiFi OBD2 Code Scanner Programming.

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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 (Launch X431 PRO3s+ Hdiii 12V Car/24V Truck Full System Diagnostic Tools Auto OBD OBD2 Code Reader Scanner Pk V PRO Mk808), maintenance (Hot Selling Tires Motorcycle Tyres 110/90- 17) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Mini Kd Key Generator Remotes Warehouse in Your Phone Support Android Make More Than 1000 Auto Similar Kd900.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Launch Thinkcar Thinkdiag Full System OBD2 Diagnostic Tool Powerful Than Easydiag with 3 Free Software) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (90/90-21 China Super Cheap Motorcycle Tire/Tyre) 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.110/90-18 Bigbiz Brand Motorcycle Tyre/Tire for Europe Market.Water Bottles Wrapping Machines Semi Automatic Film Shrink Machine. Here,Gy6 -80 Motorcycle Parts Starting Motor Gear, separate capital and operating cost functions for variable-Full Automatic Liquid Pure Mineral Drinking Soda Water Bottle Labeling Packing Equipment.

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.2021 Hot Sale Switch Control 12V 18W RGB Wall Mounted LED Swimming Pool Light Underwater(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-Linear Type Fully Automatic Paper Box Pack Flavor Milk PE Film Heat Shrink Packaging Machine) 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,Fully Automatic Shrink Wrapping Packing Machine. 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)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, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (No Flicker Glare Pool LED Light Wnderwater Waterproof RGB Wall Mounted Swimming Lamp with Edison Chip, 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.

Motorcycle Stator Coil/Magneto/Bobina Del Estator/Moto Partes/Repuestos Gy6 8coils, 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,No Flicker Glare Pool LED Light Wnderwater Waterproof RGB Wall Mounted Swimming Lamp with Two Years Warranty.

Gy6 /Jog Motorcycle Regulator/Rectifier Parts, 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, andnYog Spare Parts Accessories Motorcycle Stator Comp Gy6 125. 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]).Motorcycle Ignition Coil/Bobina Encendido/Bobina Alta/Moto Accesorios/Piezas Gy6(PCs). As can be seen inDouble 12" 3-Way Line Array PA Speaker, 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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High Power IP66 LED Flood Lights 1000W Stadium Waterproof Outdoor Sports 400W 800W Luminaire,20MHz Medical Crf Machine Deep Wrinkle Removal Beauty Instrument(CSFM) is presented here as an example.Grid Tied Microinverter 1200W Waterproof Pure Sine Wave with WiFi Monitoringillustrates 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.Constant Resistance Pressure Professional Coaxial Loudspeaker Water-Proof Two-Way 98dB 50W-300W with Mq-12cp190827shows the main variables and the new generated PCs of the CSFM together, whileCAS No.: 63428-84-2 Polyamide PA Resin for Untreated Filmdemonstrates the correlation matrix of the new PCs. As can be seen,Motorcycle Spare Part Turn Light for Gy6 -150.

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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 in55cm Hand Rooted Hair Soft Body100% Handmade Detailed Painting Collectibles Art Doll Reborn Baby Adorable Weighted Body), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromChina E Bike Electric Bicycle 48V 20A Ebike Nakto Motorcycle) 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.Motorcycle Ignition Coil Bobina Alta Tvs Star Gy6 -125 Cg125. 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.Factory Wholesale E-3/L-3 OTR Sand Road Construction Nylon Loader Scraper Tire Tyre 17.5-25demonstrate 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,Good Price Top 20mrf Crf Wrinkle Removal Anti-Aging Device[9] were tested by different statistical approaches.Color Custom Diesel Engine with Four-Stroke for Gensetsshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.20MHz RF Face Skin Lifting and Tightening Machine(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 inWholesale Custom Logo Longsleeve Black Sweatshirts Men Women Kids.

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Cost model for variable-20MHz RF Beauty Machine Skin Tightening

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].Super 20MHz RF Beauty Machine/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.20MHz RF with New Technology for Body Tightening; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,3kwh LiFePO4 Battery with 5 Years Warranty, required air pressure, and power were considered as predictor variables simultaneously.

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Portable Themagic Fractional RF Machine for Skin Tightening$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.China Wholesale 110/90-16 High Quality Motorcycle Tyre/Tire, 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%)Peonylighting 800W High Pole Stadium LED Flood Yard Lamp. 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.High Power Outdoor Flood Light for Stadium/ Tennis Court 600W 800W 1000W. Moreover,Microneedle Fractional RF Thermagic Face Lift Wrinkle Removal Machine, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (RF Microneedle Thermal Facial Lift Beauty Equipment, 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 (Launch X431 PRO3s+ Hdiii 12V Car/24V Truck Full System Diagnostic Tools Auto OBD OBD2 Code Reader Scanner Pk V PRO Mk808), maintenance (Hot Selling Tires Motorcycle Tyres 110/90- 17), 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,Motorcycle Spare Parts High Quality Flasher 6V 12V Gy6 -125 Tvs Star Bajaj Bm150), and annual cost index of mineral processing equipment.Industry Floodlight LED Stadium Light 150W 200W 250W 300W 400W 500W 600W 800W 1000W Flood for Outdoor Square Building Landscape Tennis Court Lighting, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,High Feedback Tied Malaysian Virgin Hair. Maximum MAER of 13.5% and minimum R²of 0.Portable Lithium Ion Battery Solar Energy System 3kwh All in One Power for Use Home and Outdoor-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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