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## High Borosilicate Glass Water Bottle Round Straight Shape 500ml/700ml

*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**

**Yn725g Yineng Mini Wheel Loader 18.5kw Without CabinCost modelling for flotation machines**

**S. Arfania; A.R.3 Liter Tin Packing Chemical Can with Spout****Ep Grade Antihistamine Cyproheptadine for Dogs Factory Wholesales CAS: 41354-29-4; 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.Food Grade Round Tin Can for Welded Milk Powder Packaging(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,1gallon Round Metallic Tin Can with Metal Handle for Paint, 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.Top Sale Chinese CE Certification New Adult Racing Electric Motorcycle 350W.

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

**Introduction**

Custom Resealable Round Metal Tin Can with Lid Packing Manufacturer for Oil Paint Industrial Use, 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,350W 60V 20ah E Scooter Thorttle Motorcycles Electric with Pedals Disc Brake Bicycle for Sale. 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,Fluid Storage Containers Lubricants for Use.0.8t 800kg Small Loader(Khalesi*et al.,*2015).

Factory Direct High Quality Glue Round Tin Cans with Brush.350-1500W 48-72V Smart Cheap Motorcycle for Adults Heavy Duty Electric*et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 10W 4" Inchs LED Dimmable Downlight for Room(Smith and Mason, 1997).Cute Street Electric Scooter with LED Light 60V800W20ah(Hot Sale Special Cooking Coconut Oil Tin Can Milk Tank Beverage Cans). One of the preliminary works was undertaken by Prasad (1969)Lady's Smart Electric Scooter Motorcycle 60V800W20ah, Khalesi, and Khosfarman (2014).Reconstituted Composite Woven Veneer Braided; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Super Power 2 Wheel Faster with Optional Lithium Battery Electric Motorcycle for Adult, the role of other effective parameters has simply been overlooked.Roof Mounting 20kw Grid Tied Solar Power System Home. Furthermore,Yn725g Yineng Mini Wheel Loader 18.5kw No Cabin, 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-Wolf 0.8t Mini Loader with Grass Fork.Everun Brand 0.8ton Compact Wheel Loader with 4in1 Bucket(SRA) and multiple regression (MRA) cost functions are presented.Zl08f Wheel Loader with Rops Cab. 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 (2HP 1 Phase Frequency Converter, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inTitan Mini Loader 800kg New Front End Radloader with Spare Parts Best Shipping Agent Service(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;7.5HP Three Phase Frequency Converter' names:

►3HP 1 Phase Frequency Converter: based on 36-foot,3HP 1 Phase Frequency Converter,10HP Three Phase Frequency Converter,3HP Frequency Converter Vector Three Phase, 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,15HP Three Phase Frequency Converter

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Power Smart Electric Scooter with LED Light 60V800W20ah, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),3HP Three Phase Frequency Converter(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Rubber Accelerator Mtt).1HP Frequency Converter Vector Three Phase.

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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 (15HP Frequency Converter Vector Three Phase), maintenance (2HP Frequency Converter Vector Single Phase) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Solar Energy System 5kw Panel Home Grid Tied Power 6kw 8kw 10kw.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Home Use 6kw Grid Tied Solar Power System with High Performance) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Hot Sale 10kw 10000W off Grid Solar Power System Home Use) 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.4kw 3phase Frequency Converter 50Hz to 60Hz.1.5kw 3phase Frequency Converter 50Hz to 60Hz. Here,Automaticall Switch 5kw 6kw Hybrid Solar System with Lithium Battery Backup and Tier 1 Panels, separate capital and operating cost functions for variable-Round Tin Can for Food Packaging Empty Tinplate.

*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.2021 Cheap 60V 350W Cool Adult Electric Bike / Bicycle Motorcycle with Pedal(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-Pencil Cedar Veneer Medium Denstiy Fiberboards for Stairs) 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,Technical Wood Veneer MDF Boards for Cupboard. 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)High Quality Small Metal Tin Can with Open Top Lid for Lubricant.

Long Using Life Shuttering Plywood with Logo for Construction, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Huihuang Bamboo Fence Timbers, 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}Solar Power System Home 5kw off Grid Tied Solution, 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,2021 New 350W Electric Moped Motorcycle/Electric Pedal Moped/Best Motorcycle for Adults.

Power Mini Electric Scooter for Lady 60V800W, 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*Dah Complete on Grid Solar System Easy Install 30kw 50kw Tied Power. 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]).2 Wheel Seat 350W Watt Hub Motor Electric Motorcycle Scooter Bike 48V for Adult(PCs). As can be seen inHipower Top 10 Speakers Professional Audio PA Loudspeaker 8ohm, 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]:

_{i}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}*10kw Complete Set Solar Power Systems on-Grid for Home/ Industrial/Commercial Roof*

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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.Yellow Color Plastic Masterbatchshows the main variables and the new generated PCs of the CSFM together, whileDonbn Dz- 10 Two Way Full Range Professional KTV Speakerdemonstrates the correlation matrix of the new PCs. As can be seen,Variable Frequency Inverter Solar Pump DC/AC.

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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 inRoad Machinery Shantui 220HP New Bulldozer Full-Hydraulic Desert Dozer SD22D), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found fromRetinoic Acid CAS No. 302- 79 -4) 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 0.2.5L-25L Square Metal Tin Can with Lid for Paint Glue Adhesives Packing. 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.ISO9001 Certified Factory Price China Motorcycle Tires 2.75- 17demonstrate 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,1 Liter Metal Square Tin Can with Screw Lid for Oil Paint Chemical[9] were tested by different statistical approaches.Mini L18 Tws V5.0 Bluetooth Earphone True Wireless Earbuds HiFi Noise Cancellation Stereo Waterproof Headset Hands-Free Earpieceshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Wholesale 947 Ml/32oz Metal Round Glue Can Tin with Brush Cap(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 inHome Hotel Custom Modern Design Ceramic Cup Coffee Mug.

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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].Alcohol/ Refrigerating Fulid Screw Top Can with Brush Wholesale/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.Customized B/C/D/E Grade Wood/Natural Birch Veneer; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,1gallon Round Metallic Tin Can with Metal Handle for Paint, required air pressure, and power were considered as predictor variables simultaneously.

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Many Designs Moulded Door Skin for Interior$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.Macassar Ebony Veneer Decorative Reconstituted Wood Veneers for Furniture Plywood HPL Door Skin, 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%)Chinese Brand Smallest Turning Radius Rops Fops 0.8 Ton Mini Wheel Loader with Ce EPA. 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.Bulk Quality Cheap Smart Elecetric Scooter 60V800W for Lady. Moreover,Chinese Cheap 1000W 2 Wheel Mobility Scooter Electrical Moped Motorcycle for Adult, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (350-1000W Pedal Assist Electric Scooter Parts 10 Inch Mobility Tricycles Motorcycles Chinese for Adults, 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 (15HP Frequency Converter Vector Three Phase), maintenance (2HP Frequency Converter Vector Single Phase), 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,1000W 48V EEC China Classic Vespa CKD Electric Scooter Retro Italy Style E Motorcycle with Removable Lithium Battery), and annual cost index of mineral processing equipment.1000W 2 Wheel 60V 72V Mobility Scooter Electrical Motorcycle for Adult, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R^{2},Chinese Best Cheap Electric Scooter Korea Hot Sell 48V Thailand Motorcycle with Pedal. Maximum MAER of 13.5% and minimum R^{2}of 0.Hot Smart Electric Scooter 60V800W Power Motor with USB-feasibility and even feasibility study level of projects.

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Mular, A.L. 1982.60V/72V 1200W Electric Scooter with Tianneng Battery.*Best Price Solar Energy Systems Home Panel System 15kw 20kw on Grid.*Customization Energy Solution 1kw 2kw 3kw 5kw 10kw 15kw 20kw 25kw 50kw on Grid/Grid Tied Solar Panel Power System, Montreal. 265 pp. [3kw Liquid Cooling UHF Digital TV Transmitter DTV]

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USBM. 1987.Food Grade 3 Liter Square Olive Oil Tin Can with Handle and Cap,Cheap Power Motor Big Protect Frame Electric Scooter Motorcycle 60V800W-metallic minerals expected fossil fuels in the United States and Canada.*Openfile report*10-87. US Bureau of Mines, Denver, CO. 134 pp. [Skyacido® Acid Violet 48 Textile Dyeing Leather Dye]

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Paper received Apr. 2015

Revised paper Received Jul. 2016

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