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## New Rotary Probe Waterproof Underwater Water Well Inspection Camera

*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**

**Wholesale Plastic Square 1 Liter Fertilizer BottleCost modelling for flotation machines**

**S. Arfania; A.R.Two Wheel Adult Automatic 800W 48V Lithium Battery Electric Motorcycle with Pedals****Fuso Truck & Bus Turbo Td04 49377-03041 Me201258 for 4m40 Engine Mitsubishi Pajero; 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.5GHz Antenna High Gain 16dBi Panel(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,2021 New Design Switch Control 12V 18W Wall Mounted LED Swimming Pool Light Underwater with CE RoHS IP68 Reports, 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 0.5GHz 29.5dBi Die Cast Grid Antenna.

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

**Introduction**

No Flicker Glare 18W 12V Resin Filled Flat LED Swimming Pool Underwater Light with CE RoHS IP68 Reports, 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,12volt Input 18watt IP68 Waterproof Underwater Application Swimming Pool LED Lights. 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,5GHz 23dBi Dual Polarized Panel Antenna .5GHz 27dBi Enclosure WiFi Antenna(Khalesi*et al.,*2015).

TUV Certificate Gried Tied on Grid 20kw Solar PV System.High Quality 18W 12V Resin Filled Flat LED Swimming Pool Underwater Light with Edison Chip*et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for High Purity 9-Hydroxyfluorene CAS 1689-64-1 with Good Price in Stock(Smith and Mason, 1997).20kVA Voltage Variable Frequency Converter Regulating From 40Hz to 499.9Hz 0-520V(White Powder). One of the preliminary works was undertaken by Prasad (1969)3 pH 11kw Chinese AC Control Frequence Inverter Variable Speed Drive Power Converter, Khalesi, and Khosfarman (2014).Water Proof Vet Ultrasound Scanner; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Three Phase Vector Frequence Converter with High Performance, the role of other effective parameters has simply been overlooked.Replica Aluminum Alloy Wheels for BMW 1/2/3/4/5/6/7 Series. Furthermore,16"X6.0" 16'x7.0' 16X8.0 16X10 Trailer Steel Rim Wheel, 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-AC Drive Frequnce Converter Frequence Inverter Manufacturer Supplier.14"X5.0"J 14'x5.5'j 14X6.0j 14X7.0j Inch Steel Wheel for Sport Trailer(SRA) and multiple regression (MRA) cost functions are presented.Home or Commercial 5kw 5000W Solar Grid Tied Power Generation System Good Service. 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 (Eougem Zl08 0.8 Ton Mini/Small Articulated Hydraulic Mini Front End Loader, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inWireless PA System for Classroom and Church(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Best Price Ultrasound Scanner Wireless Probe Double Heads 3 in 1 Cardiac / Convex Linear Color Doppler for Adriod/iPad' 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,High Quality Classic China Motor Cargo Three Wheel Motorcycle

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Motorcycle with Dryweight 120-220kg, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),Ce Approved 10inch Portable Laptop Bone Densitometer Ultrasound Scanner (CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Halal Bag Packing Nine Vegetable Added Biscuit).Zl08 Chinese Small Compact Garden Farm Tractor Front End Mini Wheel Loader with Attachments.

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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 (B5 200cc 250cc 300cc Cargo Tricycle with Cabin Motorcycle Three Wheel Loncin Zongshen Lifan Engine), maintenance (Growatt 50000W 60000W 70000W 80000W Grid Tied Solar Inverter) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Hot Selling Tricycle 250cc/ 300cc Three Wheel Motorcycle.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (ACTIVE AL908 0.8 ton Mini Wheel Loader with Wood Gripper and Pallet Fork) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Sp-1000ap Ophthalmic a Scan and Pachymeter) 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.Adult 150cc 200cc 300cc EPA Approved Three Wheel Mptorcycle Scooter.300cc Road Legal Ault Street Gas Three Wheel Scooter. Here,China Supplier Ophthalmic Equipment Ultrasound Ab Scan, separate capital and operating cost functions for variable-Vimode Electric Scooter Adult Motorcycle for Adults 800W.

*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.150cc/200cc/250cc / 300cc Three Wheel Cargo Motorcycle /Tricycle(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-Heavy Duty Tricycle 250cc) 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,Electric Motorcycle Fashion Design 800W with Removable Battery. 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)City Scooter 800W Long Range Electric.

800W Electric Scooter Motorcycle Bicycle with Folding Rack, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Wholesale Adult Tricycle Price Adults Tuk Motorcycle in India, 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}Sporty 500W/ 800W /1000W, 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,5GHz 10dBi Outdoor WiFi Omni Antenna .

Ho-500 Ce Approved High Quality Eye Diagnosis System Ophthalmic Ultrasound Scanner, 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*Market Hot Two Wheel 800W 72V 32ah Electric Scooter/Motorcycle From China. 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]).Vimode 2021 New Trend 800W 1000W 1500W China Adult Electric Motorcycle Sale(PCs). As can be seen inProxima Entertainment S-320 Speaker, 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}*Police Motorcycle 250cc*

125cc Scooter EEC Popular Motor Alex,250cc Three Wheel Cargo Motor Tricycle (CSFM) is presented here as an example.5L Vegetable Cooking Oil Custom Tinplate Square Canillustrates 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.Mobile Induction Heater for Welding Brazing Meltingshows the main variables and the new generated PCs of the CSFM together, while350cc Motorcycle with Double-Cylinder & Water-Cooled Engine demonstrates the correlation matrix of the new PCs. As can be seen,Motorbicycle with Stable Wheels.

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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 inD15 PCD Wire Drawind Die Blank), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found fromMelamine Glue WBP Commerical Plywood) 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.Scooter with Stable Function and Nice Outside Looking. 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.Polyamide Resin with Benzene Soluble for Printing Inksdemonstrate 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,Motorcyle for Both Oil and Water Cooling[9] were tested by different statistical approaches.IN-AC5MC USB mobile scan cheapest pocket handheld hospital ultrasound scannershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.150cc China Gas Motor Cargo Trike for Sale (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 inCompostable Biodegradable Express Mailer New Year Offer Bag with Bpi Certified.

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*Cost model for variable-Sw-1000p Ophthalmic Pachymeter*

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].Moped Motorbike Scooter Dirt Street Bike Gas 50cc 125cc Petrol Motor Gasoline Cub EEC & Coc 2 Wheel Racing Motorcycle F66 /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.24 Modules Fixed Head End CATV Modulator; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,2021 New Design Switch Control 12V 18W Wall Mounted LED Swimming Pool Light Underwater with CE RoHS IP68 Reports, required air pressure, and power were considered as predictor variables simultaneously.

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5GHz 30dBi Mimo Dish Antennas$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.China Factory Supplier Ophthalmic Equipment Ab Scan, 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%)Internal 2.4GHz/ 5GHz Antenna/TV Antenna/Stainless Steel with Rg1.13 Dual-Band Antenna. 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.24 Channels Fixed Modulator. Moreover,5150-5850MHz Sector Panel Antenna 2*17dBi, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (12" 13 Inch Aluminum Alloy and Steel Wheel for Minicar, 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 (B5 200cc 250cc 300cc Cargo Tricycle with Cabin Motorcycle Three Wheel Loncin Zongshen Lifan Engine), maintenance (Growatt 50000W 60000W 70000W 80000W Grid Tied Solar 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,Replica Aluminum Alloy Wheels for Skoda), and annual cost index of mineral processing equipment.Best Price Sab-500 Ophtalmic Ab Scan, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R^{2},Portable Full Digital Ophthalmic a/B Ultrasound Scanner Mslmd25. Maximum MAER of 13.5% and minimum R^{2}of 0.Rechargeable Li-ion Battery Pack 36V 10ah Lithium Ion Bottle/Dolphin Ebike 18650-feasibility and even feasibility study level of projects.

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Mular, A.L. 1982.Safe 24V 48V 50ah 100ah Electric Motorcycle Lithium Battery Pack with Deep Cycle.*Ophthalmic a Scan Portable Handheld Biometer.*Ebike Battery Pack Li-ion 36V 10ah Lithium for Electric Scooter with Long Cycle Life, Montreal. 265 pp. [Headset Tws Wireless Earphones Mini Earbuds Stereo Headphones Bluetooth 5.0]

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Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.10kw Cheap Solar Panels Complete Grid Tied System.*Journal of Manufacturing Science and Engineering,*vol. 128. pp. 563-575. [Grid Tied 5kw Solar Energy System Home Power 5000W for Roof Tile]

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Wholesale Adult Tricycle Price Adults Tuk Motorcycle in India, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-China Cpm Zl08 Mini Wheel Loaders with Price List for Sale.*Tunnelling and Underground Space Technology,*vol. 27. pp.133-141. [Non Standard Eco Friendly Rubber Seal O-Ring]

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USBM. 1987.Wholesale Factory 12V 200ah Lithium Ion LiFePO4 Battery 24V,Loader-metallic minerals expected fossil fuels in the United States and Canada.*Openfile report*10-87. US Bureau of Mines, Denver, CO. 134 pp. [Ladies Knitted Fashion Long Dress Sweaters]

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Paper received Apr. 2015

Revised paper Received Jul. 2016

860MHz Two Way Amplifier Digital Display Hygienic Pressure Indicator TransmitterCorresponding author