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S. Arfania; A.R.Jy125t-36c 125cc Scooter with Cdi and Efi0.6m 5GHz Parabolic Antenna with Gain 28dBi; 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.5GHz 18dBi Dual Polarized Panel Antenna (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,2021 New Arrival China Supplying Internet TV Set Top Box Smart 4K HD 4GB Android 9 Amlogic S922X, 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 0.5GHz 23dBi Enclosure WLAN Antenna.

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

Introduction

16" Inch Steel Wheel for Toyota Prado Land Cruiser, 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,off Road 200cc Motorcycle for Hot Sale. 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,off Load 150cc Motorcycle with High Speed.China 125cc Moto Efi Euro 4 2t 4t Stroke Motorcycle Motor 49cc 50cc 150cc Moped EPA EEC Gas Scooter(Khalesiet al.,2015).

China Al-Gw6 800W Electric Motorbike with 60V/20ah Battery.Linux TV Box International Internet Smart IPTV Zgemma I55et al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Electrical Saver Box (Smith and Mason, 1997).Replica Aluminum Alloy Wheels for BMW(Cosmetic Pearlescent Pigments Chameleon Color Travel T8637n Multicolor Metal Effect Paints). One of the preliminary works was undertaken by Prasad (1969)20" Inch Replica Aluminum Alloy Wheels for Astonmartin, Khalesi, and Khosfarman (2014).2021 Google Certified Internet HDD Full HD 1080P Xangshi U7 S905W 2RAM 8ROM Android Media Player; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Replica Aluminum Alloy Wheels for Volkswagen VW Tiguan Atlas Touareg, the role of other effective parameters has simply been overlooked.Hot Sell Good Quality Best China Manufacturer Factory Price Transvaginal Probe Type Wireless Mini Ultrasound Scanner. Furthermore,Gospell End-to-End Solution Digital Video Services Rights Management System Interface STB, 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-Medical Automatic Ultrasound Bone Densitometer in Low Price.Yj-Ubd7a Automatic High Effective Ultrasound Bone Densitometer Made in China(SRA) and multiple regression (MRA) cost functions are presented.Ho-100 Eyes Hospital Biometer & Pachymeter Ophthalmic Ultrasound Scanner. 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 (IN-A4CPL Portable Wireless WiFi ultrasound color doppler scanner machine, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inHigh Power Two-Way Full Range PRO Audio Speaker Box System(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Automatic High Effective Ultrasound Bone Densitometer Made in China' 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,Apr125 Red Motorcycle

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Apr125-2 White Motorcycle, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Underwater Swimming Pool Light Decoration LED Lamp(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (High-End Small Glass Spray Bottle Sample Perfume Dispenser for Personal Glassware or).IN-AC5MC USB mobile scan cheapest pocket handheld hospital ultrasound scanner.

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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 (Euro4 4 Valves Oil-Cooled Efi 125cc/135cc Smaller Straddle Motorbike with Front and Rear Disc Brake), maintenance (350cc Motorcycle with Double-Cylinder & Water-Cooled Engine ) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Popular Medical Device Automatic Bone Densitometer.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Diesel Cargo Three Wheel Tricycle for Sale From China) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Diesel Dump Central Steering Drive Three Wheeler From China for Sale) 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.Chinese Diesel Three Wheel Tricycle with Sunshade.One and Half Rows Three Wheeler for Sale. Here,Chinese Wholesale Gas Powered EPA Ce Trike Scooter 300cc, separate capital and operating cost functions for variable-Adult 800W Power Electric Scooter Suit for Woman.

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.800W Electric Motorbike with Front Disc Brake(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 Selling 60V 800W /72V 1200W New Electric Scooter/E-Scooter Motorcycle) 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,dB002e Hot Sell Electric Motorcycle 800W and Kids 500W with Ce for. 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)350W/500W/ 800W /1000W/1200W Motor Electric Scooter EW-519 Classis Model.

800W 60V20ah Lead-Acid Battery Electric Scooter Motorcycle, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (New Energy Pedal Electric Scooter Max Speed 35km/H 350W 500W 800W Motor Power, 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.

5GHz 30dBi Grid Parabolic Antenna , 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,5GHz Dish Parabolic Antenna 29dBi.

2.4/ 5GHz Dual Band H-Pol Sector Antenna, 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, andnElectric Dirt Bike Zm-Es18 with 500W- 800W Motor. 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]).5GHz 20dBi Enclosure WLAN Antenna(PCs). As can be seen inTrimethyl Cis, 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.High Quality with Good Price Oxytetracycline HCl Powdershows the main variables and the new generated PCs of the CSFM together, whileGas Ski Adult PRO Electric Start Snow Scooterdemonstrates the correlation matrix of the new PCs. As can be seen,5GHz 34dBi Dish WLAN Antenna.

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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 inCustom 3D Logo ABS Alloy Chrome Badge Sticker Car Letter Emblem), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found from3HP Frequency Converter Vector Three Phase) 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 0.18W RGB Resin Filled LED Surface Mounted Underwater Pool Light. 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.1.4828 S30900 309 0cr23ni13 Uns DIN JIS SUS309 Stainless Steel Round Pipe Tubedemonstrate 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,Poplar Film Faced Plywood Board with Carb Certificate[9] were tested by different statistical approaches.99% Glycolic Acid Powder CAS 79 -14-1shows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.18W 12V IP68 Waterproof LED Swimming Pool Lamps(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 inWindproof Fabric 12m * 30m White Party Dome Canopies Wholesale.

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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].E1 Glue Malamine Mositure-Proof MDF with Carb Certification/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.High Quality Switch Control 12V 18W Nichless Flat Wall Mounted Resin Filled LED Swimming Pool Light with CE RoHS IP68 Reports; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,2021 New Arrival China Supplying Internet TV Set Top Box Smart 4K HD 4GB Android 9 Amlogic S922X, required air pressure, and power were considered as predictor variables simultaneously.

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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.50cc 150cc 200CCC 300cc Adult EPA/Ce 3 Wheel Gas Scooter. Moreover,2021 Hot Sale Switch Control 12V 18W Wall Mounted LED Swimming Pool Light Underwater with Edison Chip, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (150ml Plastic Clear White Bullet Liquid Bottle for Cosmetic Industry, 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 (Euro4 4 Valves Oil-Cooled Efi 125cc/135cc Smaller Straddle Motorbike with Front and Rear Disc Brake), maintenance (350cc Motorcycle with Double-Cylinder & Water-Cooled Engine ), 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,14" to 22' Inch Replica Aluminum Alloy Wheel for KIA Rims), and annual cost index of mineral processing equipment.Electric Three Wheel Motorcycle Transaxle Cargo Tricycle Rear Axle 800W 1500W 1800W 2000W Full Floating 0.5ton~1.2ton Accessories, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,300cc Cargo Tricycle of Asia Market. Maximum MAER of 13.5% and minimum R²of 0.Building Material Commercial Plywood with Carb to Europe-feasibility and even feasibility study level of projects.

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Mular, A.L. 1982.Inverter Cabinet VFD Frequency AC Drives 15kw Motor.2021 New Design Switch Control 12V 18W Wall Mounted LED Swimming Pool Light Underwater with Edison Chip.12V RGB Resin Filled Underwater Pool Lights with 2 Years Warranty, Montreal. 265 pp.         [Growatt Solar Inverter 17kw 20kw 25kw Grid Tied Three Phase on Power System]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.loader with excavator grapple wheel mini for sale good quality.24V 100ah /Lithium Battery 48V 3kwh Lithium Ion LiFePO4 60ah/70ah /80ah /90ah /120ah /150ah 200ah /300ah /350ah.12V RGB Resin Filled Underwater Pool Lights with 2 Years Warranty, Montreal. 319 pp.         [Rimonabant Powder Weight Loss Factory Direct Supply]

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New Energy Pedal Electric Scooter Max Speed 35km/H 350W 500W 800W Motor Power, A.R., Khalesi, M.R., and Khosfarman, M. 2014. A parametric cost model for mineral grinding mills.Minerals Engineering,vol. 55. pp. 96-102.         [Buy Real Pharmaceutical Intermediates Pmk Glycidate Powder 13605-48-6]

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USBM. 1987.12V 24V 48V 40ah Lithium Battery Solar 100ah 150ah 200ah 300ah 400ah 500ah Energy Storage,5L Metal Round Cans for Paint or Chemical Packaging-metallic minerals expected fossil fuels in the United States and Canada.Openfile report10-87. US Bureau of Mines, Denver, CO. 134 pp.         [Ho Scale Railway Models for Hobby Collection]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Electric Motorcycle5kw Single Phase Home Grid Tied Solar Power SystemCorresponding author