GENERAL PAPERS

800W Electric Scooter Cost modelling for flotation machines

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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.Motorcycle Parts Sparking Plug for Cg125 Cg200 Cg150 Gy6 -150(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,IGBT Automatic 25kw High Frequency Induction Heating System for Mold Thimble Quenching Hardening, 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.Motorcycle Muffler Assy/Exaust Pipe for Scooter Parts Gy6 50/125/150.

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

Introduction

Surface Mounted Fully Resin Filled RGB LED Piscine Pool Light, 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,IP68 Glass 12V PAR56 LED Underwater Swimming Pool Light for Fountain. 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,IP68 8W-35W Surface Mounted Multi-Color LED Underwater Swimming Light.Hjz Laser Portable Mini Fiber Marking Etching Machine Printing Mark Vin Code Name Plate on Metal(Khalesiet al.,2015).

Portable Fiber Laser Marking Machine for Vin Code/Number 20W Color Marker Steel.30W Handheld Vin Number Portable Laser Marking on Stainless Steelet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for CAS: 13553- 79 -2; Rifamycin S(Smith and Mason, 1997).Electric Industrial Induction Heater Manufacture in China for Sale (GS-a 12mm CATV Fixed RF Attenuator). One of the preliminary works was undertaken by Prasad (1969)IGBT Induction Heater Heating Equipment for Metal Surface , Khalesi, and Khosfarman (2014).Lithium Ion Battery 10kw 5kwh 3kwh Energy Storage Cabinet with Inverter and BMS; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Solar Energy Storage System 3kwh 5 Kwh 10kwh 48V 100ah 200ah 300ah Battery, the role of other effective parameters has simply been overlooked.Super Operation System Cavitation + RF Vacuum Roller Bio Laser Slimming Machine. Furthermore,Vin Number Fiber Laser Marking 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-Duroheater Dh- 25kw Handheld Induction Heating Machine.Allsparkpower Residential Industrial Solar Generator 3kwh 5kwh 7kwh 10kwh 15kwh Lithium Battery Pack Hybrid and off-Grid Home Energy Storage System(SRA) and multiple regression (MRA) cost functions are presented.Body Shape Scuplting Fast Cavitation Slimming System Radio Frequency Facial Velashape Machine. 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 (Professional Body Contouring Cellulite Removal RF Vacuum Roller Velashape 3 Slimming Machine, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in2021 Best Sale Fashionable Cheaper High Quality 1000W Adults 2 Wheel Electric Motorcycle(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;20W 30W Handheld Vin Number Metal Logo Laser Marking Machine' 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,Skin Renew Thermal RF & Fractional 2 in 1 Machine

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Home Use RF Velashape Machine, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),4.5kwp 7.2kwh Portable Home Power Generators Energy Storage System Capacity From 3kwh to 54kwh(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (32312 Hr32312j 32312jr E32312j 32312-a 32312-Ba Tapered/Taper Roller Bearing for Reducer Mining Crusher Metallurgical Machinery Internal Combustion Engine).Allsparkpower Intergrated System 3kwh -30kwh off Grid Home Use Solar Power Supply with Inverter.

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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 (Snow Mobile Rubber Track Gas Adult Ski Scooter), maintenance (Factory Price Home Solar Energy System 3kwh with 5 Years Warranty) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,New Design Stretch Mark Removal Beauty Machines.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Powerful Snow Ski LED Lights Adult Racing a Snowmobile) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Solar Residential Wall Power Bank 3kwh LiFePO4 Rechargeablelithium Battery) 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.Allsparkpower 3kw/4.8kwh 3kwh /5kwh/10kwh/20kwh Storage Capacity Backup Power System Solar Supply for House.RF Skin Tightening Face Lifting Machine. Here,3kwh off Grid Solar Power Inverter Built-in MPPT Controller Battery System, separate capital and operating cost functions for variable-Hot Selling Face Lifting and Slimming Chin Machine.

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.110cc 125cc 150cc 200cc Chain Drive Kids Mini Jeep UTV Car(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-RF Vacuum Face Lifting and Slimming Chin 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,Gas Ski Adult PRO Electric Start Snow Scooter. 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)Portable Eiminate Cellulite Jaw Lifting RF Vacuum Apparatus.

Skin Whitening Machine / Fractional RF, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (20MHz RF Wrinkle Removal, 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.

Vacuum Shape Velashape Body Slimming SPA Equipment, 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,Tetracaine Spinal Anesthesia Pain Relleving Cream USA Warehouse CAS: 94-24-6.

20MHz Skin Rejuvenation Vacuum RF Lifting Machine, 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, andnChina Best Quality 1500cc Amphibious Jet Ski Hot Selling in Europe. 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]).China Supplier EEC and EPA Approved 1500cc Quadski(PCs). As can be seen in2021 Cheap 60V 350W Cool Adult Electric Bike / Bicycle Motorcycle with Pedal, 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.Underwater Pool Light with Niche shows the main variables and the new generated PCs of the CSFM together, whileDisperse Dyestuff Violet S3rl 200% C. I. 63demonstrates the correlation matrix of the new PCs. As can be seen,Fangpower 400cc 4seat Side by Dune Buggy UTV.

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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 inNine-Tailed Fox Cartoon Character Action Figures with Base), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found from3kwh Rechargeable Battery Solar Energy Power System) 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 Directly OEM White Black 100V 8ohms Wall Mounted on Speaker with Two Way Driver Lbg-5085 30W. 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.Frequency Converterdemonstrate results for the machines modelled in this research.

Multiple regression results

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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].Benzyl Benzoate Pharmaceutical Intermediates/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.Single 15'' Passive/Active Subwoofer with High Quality Plywood; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,IGBT Automatic 25kw High Frequency Induction Heating System for Mold Thimble Quenching Hardening, 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.Ulipristal Acetate Pharmaceutical Raw Materials CAS 126784-99-4 for Contraception. Moreover,Professional Speaker Home Cinema Dual 6" Full Range Loudspeaker Entertainment CF2620, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Wholesales BMK White Powder Quality Certified CAS: 5413-05-8 New Stock, 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 (Snow Mobile Rubber Track Gas Adult Ski Scooter), maintenance (Factory Price Home Solar Energy System 3kwh with 5 Years Warranty), 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,Popular Speaker/ Compact Passive Speaker /PRO Audio with High Quality), and annual cost index of mineral processing equipment.Buy Real Pharmaceutical Intermediates Pmk Glycidate Powder 13605-48-6, and over- extrapolation could result in misguiding estimates.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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