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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.2021 60V 20ah EEC Motorcycle Electric Moped Scooter 500/ 800W Motorbike(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,Chinese Industrial Titan Small 0.8 Ton Articulated Earth Mover Euro Auto Mini Farm Truck Wheel Tractor Front End Loader for Sale, 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.Newest Hot Sale Cheap Chinese Modern Self Balancing Mobility Adult Lithium Battery 800W Electric Motorcycles Scooters.

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

Introduction

Three Phase Frequency Inverter Made in China Hot Sale, 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,0.8ton mini wheel loader with small bucket for multifunctional use. 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,Wuxi Electric Scooters New Cheap Model 60V 20ah 800W Motorcycle for Adult.2 Wheel Electric Motorcycle with Lead Battery(Khalesiet al.,2015).

Solar Panel System 20kw Grid Tied Power for Home.5kw Solar-Diesel Generation Hybrid Grid- Tied Power Systemet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for off Load 150cc Motorcycle with High Speed(Smith and Mason, 1997).Global Certificated 30kw Grid Tied Solar Power System for Commercial Projects(Polyamide Fabric PA). One of the preliminary works was undertaken by Prasad (1969)2852 Alicosolar Solar Energy System 10kw 5kw Power Home 15kw Grid Tied, Khalesi, and Khosfarman (2014).Cheap Commercial Plywood for Construction Decoration and Furniture Use; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Kodi TV Box Fully Loaded Chrome Android 9.1 OS T95 Max H6 4G 32g Internet Satellite, the role of other effective parameters has simply been overlooked.Solar Panel System 20kw Grid Tied Home Power 20 Kw Energy. Furthermore,20kw Grid Tied Solar System, 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-Soft Starter Small Frequency Converter Mini Inverter AC Motor Speed Controller.Cheap Price Origin Brushless 800W Motor Electric Motorcycle Made in China(SRA) and multiple regression (MRA) cost functions are presented.Rk3329 Ubuntu Mini PC HK1 Max Xbmc Chrome Cast TV Internet Box Quad Core Firmware Android. 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 (220VDC to 220VAC Variable Frequency Inverter, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inWolf Mini Wheel Loader Wl950 Farm(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Solar Pump Inverter 1.5kw AC Drive Frequency Welding 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,3 Phase Mini AC DC Frequency Inverter Motor Speed Controller Power Supply 5.5kw-110kw

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,VFD Frequency Converter Inverter for Constant Pressure Water Supply, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),AC Drive Solar Pump Inverter 220V 380V Three Phase Inverters(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Bluetooth Controlled LED Strip Light with Rechargeable Battery).7.5HP Elevator Inverter Price Electronics 220V 240V Three Phase Pump.

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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 (large cabin and powerful engine Customized 0.8ton mini wheel loader), maintenance (Qingzhou 0.8ton Shovel Loader Small Front with Bucket for Sale) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Eougem 0.8ton Articulated Payloader Zl08 with Changchai Engine.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (AL908 0.8ton Wheel Loader Machinery for Sale) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Chinese Everun Zl08 800kg 0.8 Ton Compact Small Mini Wheel Loader with Snow Bucket) 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.800kg China Small Front High Quality Wheel Loader for Sale in Europe.Melamine Glue WBP Commerical Plywood. Here,Decorative Pine Groove Plywood Veneer Fancy, separate capital and operating cost functions for variable-E0 Glue White Bleached Poplar Plywood Bb/Bb Grade High Quality Carb Certificated.

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.18mm Brown Film Faced Finger Jointed Plywood for Concrete Formwork(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-18mm Embossed Melamine Faced Commercial Plywood for Furniture Making) 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,Filmfaced Plywood with High Quality and Cheap Price. 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)9mm E1 Glue Bintangor Plywood Board.

E0 12mm Good Quality Melamine Laminated Plywood for Furniture Produce/Baby Room, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (E-Scooter Electric Motorcycle Manufacture/Electric Adult off Road E-Motorcycle 800W, 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.

AC Drive, 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,Hot Sale 60V 800W Brushless Motor Two Wheel Electric Motorcycle.

Sell Well 800W 60V Electric Motorcycle for Daily Riding, 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 Reliable Quality 3.7kw 3-Phase Solar Water Pump Inverter for Irrigation System. 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]).15kw Grid Tied Solar System(PCs). As can be seen inCAS 79 -14-1 Glycolic Acid 70%, 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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0.5HP Elevator Inverter Price Electronics 220V 240V Three Phase Pump,12kw Grid Tied Complete Set Easy Installation Solar Energy System for Home Use or Industrial(CSFM) is presented here as an example.BMW N63 S63 Camshaft Alignment Tool Set illustrates 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.Oxygen Absorbers Food Packaging Vacuum Packed Bag for Cookiesshows the main variables and the new generated PCs of the CSFM together, whileHot PC Resin Filled 18W AC RGB Wall Mounted LED Underwater Light with Two Years Warrantydemonstrates the correlation matrix of the new PCs. As can be seen,Grid Tied 11kw Solar Panel System Home Commercial Power Supply.

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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 inMini Wooden Cube Board Game Pieces Made in China), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found from2021 New Modern Design Living Room Leather Sofa) 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 0.12kw Grid Tied Solar System. 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.2021 New Removable Battery 350W Motor Scooter Electric 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,Chinese Frequency AC Drive Pure Sine Wave Inverter Mini Water Pump Motor Controller[9] were tested by different statistical approaches.Android Digital Signage Intelligent Hand Sanitizer Displayshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.200cc/300cc Adults Racing Go Kart for Sale Ce Certificate(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 in2021 Factory Wholesale Price All-in-One 55inch Digital Monitor Touch LCD Display Kiosk Double-Side Indoor/Outdoor Signage Advertising Media Player.

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Cost model for variable-Water Pumping AC Variable Frequency Drive Solar Pump Inverter for Submersible

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].0.4kw 0.5HP Elevator Inverter Price Electronics 220V 240V Three Phase Pump/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.Jarol Strong Overload Capacity AC Drive Frequency Inverter ; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Chinese Industrial Titan Small 0.8 Ton Articulated Earth Mover Euro Auto Mini Farm Truck Wheel Tractor Front End Loader for Sale, required air pressure, and power were considered as predictor variables simultaneously.

China Pumping AC Variable Frequency Drive Solar Pump Inverter for Submersible. Moreover, the operating cost was detailed in different cost items.Sporty Electric Scooter , indicated inPharmavceutical Grade 2-Phenylbenzimidazole CAS 716- 79 -0 with Good Price, and major extrapolation should be avoided.

SMD3014/2835 AC/DC Underwater LED Swimming Pool Light$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 0.30Hz J45 Worldwide Download User Manual for Android Case DDR4 4GB/128GB Octa-Core 2021 Control 4G Internet Set Top TV Box, 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%)Best Selling 4X4 Farm ATV. 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.Cheap Racing Go Kart for Sale 200cc Water Cooled Zyao. Moreover,Good Quality Eco-Friendly 500- 800W Electric Motorcycle with Fast Delivery, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Suspension Delivery Chinese 800W Electric Motorcycle Small Long Range Accessories Two Wheels, 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 (large cabin and powerful engine Customized 0.8ton mini wheel loader), maintenance (Qingzhou 0.8ton Shovel Loader Small Front with Bucket for Sale), 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,Amlogic Chipset S905X2 Quad Core Android8.1 4K Smart Internet TV Box T95q), and annual cost index of mineral processing equipment.Plywood Mdo / Hdo for Concrete Formwork Slab Form, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Electric Scooter/ Motorcycle/TM-Monya. Maximum MAER of 13.5% and minimum R²of 0.Electric Scooter with Anti-Theft Motor Lock -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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