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*On-lineÂ version*Â ISSN2411-9717

*PrintÂ version*Â ISSN2225-6253

### J. S. Afr. Inst. Min. Metall.Â vol.117Â n.1Â JohannesburgÂ Jan.Â 2017

#### http://dx.doi.org/10.17159/2411-9717/2017/v117n1a13Â

**GENERAL PAPERS**

**Full Channels High-Tech Zgemma H. S Satellite TV Receiver High CPU Linux OS DVB-S One TunerCost modelling for flotation machines**

**S. Arfania; A.R.5150-5850MHz Sector Panel Antenna with Gain 13dBi****Gy6 -125/ 150ccformaular; 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.Dirt Bike for Sport Using with Large Power Engine(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,Electricity Saver Device , 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 R^{2}, 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 R^{2}of 0.3 Phase 50 - 60Hz Intelligent Power Saver.

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

**Introduction**

High Efficient Industrial Electric Motor Power Saver, 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,EEC 125/300cc Euro 5V Max Scooter-Alex One. 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,Electricity Power Reducer .Nylon OTR Bias Tyre/Tire Manufacture E3/L3 15.5-25 17.5-25 20.5-25(Khalesi*et al.,*2015).

Electrical Saver Box .Sector Panel Antenna *et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Jwell-PVC Plastic Foaming|Semi-Skinning Board Recycling Agricultural Making Extrusion|Co-Extrusion Machine for Furniture Decoration Factory Direct Buy(Smith and Mason, 1997).15.5-25 17.5-25 20.5-25 23.5-25 OTR Tire(High Quality Coffee /Candy/Weed Plastic Container). One of the preliminary works was undertaken by Prasad (1969)Growatt 2kw on Grid Inverter 2000W Tied for Solar Power System Home, Khalesi, and Khosfarman (2014).Motorbike for 320cc with Police Cruiser Using Dry Weight 180kg; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Heavy Duty Truck Tire 17.5-25 20.5-25 23.5-25, the role of other effective parameters has simply been overlooked.Three Wheel Motor Tricycle Rickshaw Rear Axle. Furthermore,Gas Powered Adult Tricycle Motor Farm, 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-Motorcar for Both Civilc and Police Using with 320cc Displacement.Police Using of Motorcycle for Cruiser with Displacement 320cc(SRA) and multiple regression (MRA) cost functions are presented.High Quality Cylindrical Li-ion 12V 40ah 80ah Rechargeable Lithium Battery Pack for Portable Device. 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 (7kwh Multi-Function Solar Energy Lithium Battery Ion for Home, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in10 Liter Customized Printed Square Metal Fuel Oil Tin Cans for Paint Coating Solvent(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;5.8GHz WLAN/WiFi 0.9m Dual-Polarized Parabolic Antenna 32dBi Gain' 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,2.4-2.5GHz/5-5.8GHz Dual Frequency WiFi Antenna Internet for Things

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,E3/L3 17.5-25 20.5-25 1800-25 Durable Tyres for Scrapers, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),C Band Satellite TV Antenna 150cm(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Plush Cute Dog with Different Clothes).Eougem Original Cheap Radlader 0.8ton with Standard Bucket Made in China.

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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 (Dsola ODM/OEM Design High Efficient Mc4 Connector 3 in 1), maintenance (Portable OEM Rechargeable 12V 40ah 80ah Lithium Ion Battery with MPPT and Inverter) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Mc4t-Branch Connector for Parallel Solar Panel Pair Male and Female.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (4000W/5000W off Grid Tied Solar Power System) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Internet TV Box Linux IPTV Zgemma I55) 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.L-Guard Wheel Loader L-5 OTR 45/65-45 Cheap Wholesale Tyres.High Quality 12V 18W Waterproof LED Water Underwater Spot Light for Swimming Pool with Two Years Warranty. Here,24V 40ah Lithium Iron Battery for Electric Bike, separate capital and operating cost functions for variable-Dsola Chinese Supplier Multipurpose Mc4 Y Branch Connector.

*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.Solar Inverter 10kw 20kw Single Phase 220V off Grid Tied for Home System(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-Dsola Customized High Heat Resistance 2 Pins Mc4 Solar Connector) 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,Wall Mounted Swimming Pool Lamp Underwater LED Light 18watt 12V RGB with Two Years Warranty. 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:

where*Y*refers to capital or operating costs,*X*defines an independent variable (one of the machine predictor variables), and*a*and*b*are constant values (parameters)2074 Growatt Inverter 9kw on Grid 9000W Tied Solar Power System Home.

Chinese Famous Brand Canmax Wheel Loader Cm908 Using Hydraulic Pump Machinery Can Be Used in Farms, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Waterproof IP65 Microinverter 1200W 120-230VAC Single Phase Grid Tied Solar Panel Use, Khalesi, and Khosfarman, 2014).

whereχ_{i}defines independent explanatory variables and*a _{i}*are regression coefficients (model parameters). As was mentioned, independency of

*x*variables 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.

_{i}Tycorun Famous Best 20kw Three Phase Grid- Tied DC to AC Solar Power Inverter, R^{2}, RMSE (root mean square error), and MAER (means absolute error rate) were carried out. R^{2}is 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]:

where*X _{obs}*is the observed value,

*x*the estimated value at time/place

_{e}*I,*and n,Solis 10kw Grid Tied Inverter Solis-10K-4G-LV Three Phases.

New Pattern Design 17.5-25 20.5-25 26.5-25 off Road Tyre, analysis of residuals, tests of MAER values and evaluation of R^{2}were 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).

where*C _{e}*is the estimated cost,

*C*the actual cost, and

_{a}*n*Growatt Inverter 15kw 20kw 30K Three Phase China Market Lowest Price Grid Tied. 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]).DC 1000V Mc4 Cable Connectors (PCs). As can be seen in110/90-18 Bigbiz Brand Motorcycle Tyre/Tire for Europe Market, neither*X _{1}*nor

*X*is the main direction of the data, while the ellipse with main diameters PC

_{2}_{1}and PC

_{2}matches 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 and

*X*as Equations [5] and [6]:

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In this research, main variables of*X _{1}, X_{2}*.

*.. X*were 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.

_{n}*2021 New Design 12V 18W Waterproof LED Water Underwater Spot Light for Swimming Pool with CE RoHS IP68 Reports*

12V/24V/48V/60V/72V/96V LiFePO4 Battery 40ah/50ah/60ah/100ah/200ah Lithium Ion,15kw Solar Inverter Grid Tied(CSFM) is presented here as an example.Diesel Engine Parts Fuel Injection Nozzle 156sm420illustrates the high correlation between predictor variables for the CSFM.

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.Gy6 Engine 150cc Scootershows the main variables and the new generated PCs of the CSFM together, whileEuro 5 Gy6 -50cc 4t Mopeddemonstrates the correlation matrix of the new PCs. As can be seen,Dsola Cheap Wholesale Multi Contact Mc4 Solar Connector Diode.

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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)

where*X _{i}*are main technical variables (like power or required air),

*a*are calculated by multiplication of coefficients of the model based on PCs as predictors by the eigenvectors of PCs (as illustrated inChina Professional Suppliers 0.1mm-0.2mm Diamond Copper Wire Drawing Dies / PCD /PCD Die for Aluminum), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found fromPT141 Factory Supply Best Quality Peptide Powder 10mg for Aphrodisiac) 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.Tanfon 5kVA off Grid Solar Inverter Tied /off Grid/Hybrid System. The R^{2}is about 0.94 for both cases,*i.e.*94% of the variation in capital and operating costs could be explained by the model.Yn725 Yineng Mini Wheel Loader 18.5kw Cabindemonstrate 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,25kw engine garden/farm/ construction 0.8ton front end backhoe wheel loader[9] were tested by different statistical approaches.Against Wall Australian Freestanding Acrylic Bathtubsshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Solis 3 Phase 10kw 12kw 15kw 20kw Grid- Tied Inverter(a1, a_{2}, a_{3}) and new intercept (a_{0}) 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 inElectric Hose Crimping Machine Automatic.

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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].Intelligent Power Saver for Industry Use/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.CE Approved Wolf Wl80 Zl08 Mini Wheel Loader for Farm; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Electricity Saver Device , required air pressure, and power were considered as predictor variables simultaneously.

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Made in China Strong Compact Mini Front Loader $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 0.2021 Best Selling 500W Electric Moped E Bike Bicycle with Pedals, 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 R^{2}values 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%)Manufacture 20W Fiber Laser Marking Machine for Engraving. 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.3kw Air-Cooled UHF Digital TV Transmitter DTV. Moreover,RGB Waterproof LED Water Underwater Spot Light for Swimming Pool with CE RoHS IP68 Reports, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Wholesale High Performance Metal Mc4 Connector, 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 (Dsola ODM/OEM Design High Efficient Mc4 Connector 3 in 1), maintenance (Portable OEM Rechargeable 12V 40ah 80ah Lithium Ion Battery with MPPT and Inverter), 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,No Flicker Glare High Purity RGB Resin Filled Wall Mounted LED Swimming Pool Lights with Edison Chip), and annual cost index of mineral processing equipment.1L Four-Color Cmyk Printing Lubricant Oil Packaging Tin Can for Car, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R^{2},2021 New Design High Purity 18W Underwater LED Swimming Pool Light with Edison Chip. Maximum MAER of 13.5% and minimum R^{2}of 0.IP67 1000V 3 to 1 PV Mc4 T Branch Solar Connector-feasibility and even feasibility study level of projects.

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Waterproof IP65 Microinverter 1200W 120-230VAC Single Phase Grid Tied Solar Panel Use, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-200cc Reverse Wholesale Motor Light Three Wheel Motorcycle .*Tunnelling and Underground Space Technology,*vol. 27. pp.133-141. [New X96 Mini Android Set Top Box 4K S905W 1GB]

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Paper received Apr. 2015

Revised paper Received Jul. 2016

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