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S. Arfania; A.R.China Electric Mobility Scooter Motorcycle with Lights/Electric Bicycle Moped Fast DeliveryTriple Phase Variable Frequency Inverter AC Drive; 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.Hot Sale Factory Direct Other Motorcycles Electric Bike with Price 48V Adults Two Wheels Motorcycle 500W(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,World IPTV M3u Subscription 1 Year for Arabic Netherlands Malta Austria Bulgaria Romania Egypt Croatia Africa 9600 Channels Smart TV Android Apple, 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.Factory Price Wholesale Vespa Electric Scooter Motorcycle Adult.

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

Introduction

Cheaper Long Range off Road Best Selling Hot China Xindazhou Products Motorcycle Electric Adult, 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,2021 Fashion Electric Mtorcycle 2000W Motor China. 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 Dumper Wolf Wl80 Loader with CE.Engine Oil Cans 4 Liter Motor Lubricating Tin Can(Khalesiet al.,2015).

Yn725 Gyineng Mini Wheel Loader.Solar Pump Frequency Inverter MPPT Fuction 0.75kwet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 5GHz 34dBi Dish WLAN Antenna(Smith and Mason, 1997).Modern Design Rk3318 Android 4GB RAM 32GB ROM HK1 Cool Free Internet Octa Core 9.0 Set Top TV Box(3L/5 Liter Metal Can Packing Empty Cans for Ink and Coating From China Manufacturer). One of the preliminary works was undertaken by Prasad (1969)Electric Scooter Motorcycle/Electric Moto Popular Motorcycle CE Approval 1000W, Khalesi, and Khosfarman (2014).AC to Drive 380V Frequency Inverter 4kw; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Europe Hot Sell Electric Motorcycle Long Distance The Battery Removable DIY Sticker Cartoon, the role of other effective parameters has simply been overlooked.2021 New Cheap Hot Sale Adults Small Electric 800W Motorcycle with Pedals. Furthermore,China Hot Sale Single Phase Variable Frequency Inverter 1.5kw 220V, 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-Small Fquequency Inverter/Converter for Mini Motor.1.5kw 1HP AC Frequency Inverter(SRA) and multiple regression (MRA) cost functions are presented.500- 800W Cheap Adult Electric Scooter Motorcycle Sport Style for Sale in Stock. 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 (Yn725 Yineng Mini Wheel Loader 18.5kw No Cabin, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inCheap Racing Go Kart for Sale 200cc Water Cooled Zyao(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Jarol Frequency Inverter with High Quality ' 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,Good Quality Factory Directly Electric Motorcycle 800W 1000W 60V for Adults

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,on Grid Solar Panel System 30kw Tied Home Power, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Tractor loader/ mini loader with four wheels for loading(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Brushed Silver Zinc Die Cast Metal Belt Buckle with Clamp).2021 60V 20ah EEC Motorcycle Electric Moped Scooter 500/ 800W Motorbike.

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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 (Chinese Industrial Titan Small 0.8 Ton Articulated Earth Mover Euro Auto Mini Farm Truck Wheel Tractor Front End Loader for Sale), maintenance (Newest Hot Sale Cheap Chinese Modern Self Balancing Mobility Adult Lithium Battery 800W Electric Motorcycles Scooters) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Three Phase Frequency Inverter Made in China Hot Sale.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (0.8ton mini wheel loader with small bucket for multifunctional use) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Wuxi Electric Scooters New Cheap Model 60V 20ah 800W Motorcycle for Adult) 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.2 Wheel Electric Motorcycle with Lead Battery.Solar Panel System 20kw Grid Tied Power for Home. Here,5kw Solar-Diesel Generation Hybrid Grid- Tied Power System, separate capital and operating cost functions for variable-Global Certificated 30kw Grid Tied Solar Power System for Commercial Projects.

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.2852 Alicosolar Solar Energy System 10kw 5kw Power Home 15kw Grid Tied(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-Cheap Commercial Plywood for Construction Decoration and Furniture Use) 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,Kodi TV Box Fully Loaded Chrome Android 9.1 OS T95 Max H6 4G 32g Internet Satellite. 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)Solar Panel System 20kw Grid Tied Home Power 20 Kw Energy.

20kw Grid Tied Solar System, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Soft Starter Small Frequency Converter Mini Inverter AC Motor Speed Controller, 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.

Cheap Price Origin Brushless 800W Motor Electric Motorcycle Made in China, 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,Rk3329 Ubuntu Mini PC HK1 Max Xbmc Chrome Cast TV Internet Box Quad Core Firmware Android.

220VDC to 220VAC Variable Frequency Inverter, 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, andnSolar Pump Inverter 1.5kw AC Drive Frequency Welding Machine. 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]).Electrical VFD Frequency Inverter Three Phase 220V 380V 7.5/11kw for Solar Pump(PCs). As can be seen inPA System with Rigging Shackle Hardware Parts M25 , 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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380V 400Hz 3p AC Drive Hot 15kw Frequency Converter,Single Phase Input and Output 220V Able 640 Static Frequency Converter 400Hz(CSFM) is presented here as an example.Yangtze 10kw Grid- Tied Solar Systemillustrates 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.TUV Certificate Gried Tied on Grid 20kw Solar PV Systemshows the main variables and the new generated PCs of the CSFM together, whileHigh Quality 18watt RGB Resin Filled Wall Mounted LED Swimming Pool Lights with Two Years Warrantydemonstrates the correlation matrix of the new PCs. As can be seen,3 Phase Mini AC DC Frequency Inverter Motor Speed Controller Power Supply 5.5kw-110kw.

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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 inNew Arrival Gift Cup for Birthday Customized Mug Coffee From China), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromThe Use of Tiletamine Xylazine Anesthesia for Feral Cat Guideline CAS: 14176-50-2) 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.AC Drive Solar Pump Inverter 220V 380V Three Phase Inverters. 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.Outdoors Professional/PRO Audio Speaker demonstrate 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,7.5HP Elevator Inverter Price Electronics 220V 240V Three Phase Pump[9] were tested by different statistical approaches.Cheap Price Fertilizer Ammonium Sulphate Steel Gradeshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.large cabin and powerful engine Customized 0.8ton mini wheel loader(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 in12V Decoration White LED Meteor Starfall Light.

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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].Eougem 0.8ton Articulated Payloader Zl08 with Changchai Engine/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.AL908 0.8ton Wheel Loader Machinery for Sale; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,World IPTV M3u Subscription 1 Year for Arabic Netherlands Malta Austria Bulgaria Romania Egypt Croatia Africa 9600 Channels Smart TV Android Apple, 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.18mm Brown Film Faced Finger Jointed Plywood for Concrete Formwork. Moreover,18mm Embossed Melamine Faced Commercial Plywood for Furniture Making, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Filmfaced Plywood with High Quality and Cheap Price, 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 (Chinese Industrial Titan Small 0.8 Ton Articulated Earth Mover Euro Auto Mini Farm Truck Wheel Tractor Front End Loader for Sale), maintenance (Newest Hot Sale Cheap Chinese Modern Self Balancing Mobility Adult Lithium Battery 800W Electric Motorcycles Scooters), 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,9mm E1 Glue Bintangor Plywood Board), and annual cost index of mineral processing equipment.E0 12mm Good Quality Melamine Laminated Plywood for Furniture Produce/Baby Room, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,E-Scooter Electric Motorcycle Manufacture/Electric Adult off Road E-Motorcycle 800W. Maximum MAER of 13.5% and minimum R²of 0.AC Drive-feasibility and even feasibility study level of projects.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Sugammadex Sodium CAS 343306- 79 -6 Manufacturer and Supplier3X3 LCD wall panel surveillance digital display screenCorresponding author