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## Natural Sandstone Wall Tile China Stacked Stone Veneer

*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**

**Customized 18mm Carb Birch Okoumen PlywoodCost modelling for flotation machines**

**S. Arfania; A.R.Electric Motorcycle****Double Chasis Cargo Tricycle; 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.Electric Motorcycle (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,750ml Metal Tin Can Container for Chili Oil Canning, 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.Hot Sale Food Packaging Tin Can for Cooking Oil with Plastic Lids.

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

**Introduction**

Metal Engine Oil Can Recycling Lubricant Tin Packaging Container, 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,2L Galvanized Tin Cans for Cooking Oil with Plastic Lids. 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,Electric Motorcycles .Made in China Solar System 10kw 20kw 30kw 40kw 50kw Energy for Industry(Khalesi*et al.,*2015).

Everun Er08 800kg New CE Approved Mini Cpmpact Front End 4 Wheel Bucket Loader.800W Aluminium Alloy Wheel Hubs Sport Electric Motorcycle*et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 1220*2440*18mm Birch Plywood with Carb P2 Standard Quality(Smith and Mason, 1997).Zl08 Chargeuse Wheel Loader(Glycine Methyl Ester Hydrochloride ). One of the preliminary works was undertaken by Prasad (1969)Professional Manufacturer Everun Er08 CE Approved Mini Cpmpact Front End 4 Wheel Bucket Loader, Khalesi, and Khosfarman (2014).500W EEC Electric scooter; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Electric Motorcycle , the role of other effective parameters has simply been overlooked.Solar Electric Motorcycle. Furthermore,Wechip Customized Booting Logo Rk3318 H96 Max 4+32GB/4+64GB IPTV Set Top Box 4K, 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-OEM 1500W EEC Electric Scooter .New Arrival 4K Smart S905X2 TV Box 4+64GB X96 Mini(SRA) and multiple regression (MRA) cost functions are presented.0.25mm Natural Wood Face Veneer. 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 (2L Empty Tin Container for Engine Oil Lubricant, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inNitrogen 21% Granular Fertilizer Ammonium Sulphate(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;High-Performance Three Phase Frequency Converter 380V 50/60Hz' names:

►Electric Motorcycle : based on 36-foot,EEC Electric Scooter ,800w /1100w EEC Electric Scooter ,Factory Produce Natural Face Veneer Size 1220X1830X0.25mm, and level control

►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,Electric Motorcycle/Scooter/Bike

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,800W EEC Electric Motorcycle, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),No Foldable 40-60km Range Per Charge EEC Electric Scooter(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Low Price 10HP Copeland Scroll Air Conditioner Compressor Model Zf33K4e-Twd- 551 for Chiller).1 Wheel Electric Motorcycle/One Scooter.

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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 (High-Performance Frequency Converter/AC Drive 380V 50/60Hz), maintenance (Three Phase 380V Small Frequency Converter) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Hot Sale High Performance Vector Frequency Converter 380V 45/55kw.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Single/Three Phase 220V 380V Vector Control Frequency Converter) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Factory-Enginneered Veneer Ash in 0.30mm) 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.Small Frequency Inverter 380V 50/60Hz.China Single Phase Variable Frequency Inverter 1.5kw. Here,1.2mm White Poplar Veneer From Factory for Exporting, separate capital and operating cost functions for variable-Grid Tied Solar Panel Energy System for Home Power Generation 7kw 8kw 9kw.

*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.Eucalyptus Core or Birch for Veneer with Grade AA(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-Wholesale 1.5 mm Natural Bamboo Skateboard Veneer with Best Price) 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,Popular 800W Power Electric 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:

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)1250X2500mm Rotary Cut Okoume Veneer Cheap Prices.

Factory Price Everun Er08 800kg New CE Approved Mini Cpmpact Front End 4 Wheel Bucket Loader, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (2862 Easy Installation 5kw 6kw 8kw 10kw 12kw on Grid Solar System, 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}Eougem CE 1.0 Ton Hydraulic Mini Radlader Zl08, 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,Wolf 0.8t 800kg Mini Loader with Euro 3 Engine.

500- 800W 48V 20ah OEM manufacturers Electric Scooter, 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*800W Brushless Adult Electric Scooter. 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]).2021 New Type Fashionable Chinese Supplier Brushless Max Speed 35km/H 2 Wheel Electric Motorcycle(PCs). As can be seen inNitrogen Fertilizer Caprolactam Grade Ammonium Sulphate, 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}*Best Chinese Big Wheel Electric Motorcycle Racing Bike Adult Bicycle*

Bd600 AC Frequency Inverter/Converter/220 V to 380 Inverter,1L Beer Can(CSFM) is presented here as an example.Best Price Solar Energy Systems Home Panel System 15kw 20kw on Gridillustrates 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.Spiral Reversible Replacement Solid Tungsten Carbide Round or Square Indexable Woodturning Cutters Inserts for Wood Turningshows the main variables and the new generated PCs of the CSFM together, while42 Inch Alone Standing Interactive LCD Touch Screen Information Kioskdemonstrates the correlation matrix of the new PCs. As can be seen,High Quality Electric Scooter Factory.

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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 inRound Neck T-Shirt T Shirt Manufacturer for Women), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found fromMag City Scooter 80km Range Two Wheel Electric Motorcycle) 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 0.1L Panit Can. 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.Manufacturer ASTM 316L Uns S32205 Duplex Stainless Steel Tubesdemonstrate 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,1L and 5L Can for Antifreezing Liquid[9] were tested by different statistical approaches.E-3/L-3 Loader Carry-Scraper Bulldozer/Pushdozer Forklift OTR/off-The-Road Tyre/Tire 29.5-25shows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.2021 Fashionable High Quality with Lithium Battery Electric Scooters EEC Vespa Citycoco Newest Model Motorcycle(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 inEaa Cheapest Rates Logistics Agent Amazon Fba Sea Freight Forwarder From China to USA Air Shipping.

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*Cost model for variable-Pump Inverter Variable Frequency Drive Manufacturers AC Supplier*

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].Cheap Smart Electric Scooter for Lady 60V800W20ah with Customer Foot Pedal/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.Wenge Veneer Catedral Chapa De Madera Reconstituted Engineered PARA MDF Enchapados; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,750ml Metal Tin Can Container for Chili Oil Canning, required air pressure, and power were considered as predictor variables simultaneously.

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Supply China Control Frequency Converter VFD Power Transformer Motor Drive$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.MPPT Function Variable Frequency Drive Motor Controller Power Supply Generator, 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%)0.75kw-11kw Three Phase 380V Frequency Inverter VFD. 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.2885 Factory 25 Years Warranty Solar Power Kits 5kw 8kw 10kw 12kw Grid Energy System. Moreover,2876 10kw Home Used Solar Power System on Grid Roof, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (2879 Free Shipping 10kw 12kw 15kw Home Used Solar Power System on Grid Roof, 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 (High-Performance Frequency Converter/AC Drive 380V 50/60Hz), maintenance (Three Phase 380V Small Frequency Converter), 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,AAA Grade 0.9mm Poplar Core/Veneer for Plywood/Furniture), and annual cost index of mineral processing equipment.Radiate Pine Face Veneer, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R^{2},Grade AA Veneer Furniture Building Material Plywood to Dubai. Maximum MAER of 13.5% and minimum R^{2}of 0.1L Wholesale Round Tin Can for Paint/Engine Oil with Tight Lid-feasibility and even feasibility study level of projects.

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Huang, X. X., Newnes, L. B., and Parry, G.C. 2012. The adaptation of product cost estimation techniques to estimate the cost of service.*International Journal of Computer Integrated Manufacturing,*vol. 25, no. 4-5. pp. 417-431. [Forged Alloy Steel G70 Weld on Grab Hook for Chain]

INFOMINE. 2013. Mine and mill equipment costs. InfoMine USA, Inc. CostMine Division and Aventurine Engineering, Inc. [2021 High Quality Marine 1400W Hybrid Power Inverter Solar System Portable with 3kwh Lithium Battery]

Kaiser, H.F. 1960. The application of electronic computers to factor analysis.*Educational and Psychological Measurement,*vol. 20. pp. 141-151. [Antique Design Rustic Style Furniture Nature Oak and Dark Grey Linen Shakable Leisure Sofa Chair]

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Lashgari, A.Mxq 4K PRO Allwinner H3 Quad 7.1 1GB RAM 8GB ROM H. 265 3D Android Media TV Box, A.R. 2013.2021 Best Sale Fashionable Cheaper High Quality 1000W Adults 2 Wheel Electric Motorcycle,*Set Top Box T95q S905X2 4G 32g Android 9.0 HD TV Kodi Quad Core,*vol. 23. pp. 441-446. [HD P2 Indoor Full Color SMD High Clear Big LED Advertising Display]

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Mular, A.L. 1982.5 Litre Extra Olive Oil Tin Can .*DC/AC Frequency Inverter Solar Pump Power 400-600V Input 2.2kw.*Frequency Converterlow Industrial Power Inverter, Montreal. 265 pp. [Cheap Street Electric Scooter Motorcycle with Bit Protect Frame 60V800W]

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Noakes, M. and Lanz, T. 1993.DC/AC Frequency Inverter Solar Pump Power 400-600V Input 4kw.Low Price B/C/D/E Grade Wood/Natural Birch Veneer, Carlton, victoria. 412 pp. [Big Discount 99% Glycocyamine Supply Guanidineacetic Acid 352-97-6]

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2862 Easy Installation 5kw 6kw 8kw 10kw 12kw on Grid Solar System, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Titan Chargeuses Cheap Small Log China Mini Digger Loader with European Quick Hitch.*Tunnelling and Underground Space Technology,*vol. 27. pp.133-141. [High accuracy stability Monocrystalline Silicon Pressure Transmitter]

2862 Easy Installation 5kw 6kw 8kw 10kw 12kw on Grid Solar System, Ar., Lashgari, A., Fouladgar, M.M., and Skibniewski, M.J. 2012. Estimating capital and operational costs of backhoe shovels.*Journal of Civil Engineering and Management,*vol. 18, no. 3. pp 378-385. [Plastic Vinyl Dinosaur Toy Cartoon Figure]

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Paper received Apr. 2015

Revised paper Received Jul. 2016

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