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## ETL CE FCC RoHS CB SAA C-tick Certification 24V 3A 72W Desktop Power Adaptor

*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**

**Head Gasket Cost modelling for flotation machines**

**S. Arfania; A.R.24V 100ah /Lithium Battery 48V 3kwh Lithium Ion LiFePO4 60ah/70ah /80ah /90ah /120ah /150ah 200ah /300ah /350ah****2021 New Design Switch Control 12V 18W Wall Mounted LED Swimming Pool Light Underwater with CE RoHS IP68 Reports; 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.2ND Generation Ultrasound Bone Densitometer(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,Replica Aluminum Alloy Wheels for BMW X1/X2/X3/X4/X5/X6 Series, 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.Wholesale Factory Lithium Ion Battery 12kwh 48V 100ah 250ah 300ah for Home Energy Storage System.

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

**Introduction**

High Effective Automatic Ultrasound Bone Densitometer, 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,Low Price Ophthalmic a-Scan Ultrasound with Pachymeter Ho-100. 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,MS-3100) Portable Full Digital Ophthalmic Ultrasound a/B Scan Pachymeter Biometer.4.8kwh Multi-Function Solar Energy Lithium Battery Ion for Home Portable Power Generators(Khalesi*et al.,*2015).

Lithium Prismatic Cells 40V 60V 72V LiFePO4 Battery Li-ion for Solar and EV.Lithium Ion Battery Pack 48V 60V 72V 20ah Batteries for Electric Scooter and Club Car*et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for RF Wrinkle Removal Beauty Machine(Smith and Mason, 1997).12V 24V 48V 40ah Lithium Battery Solar 100ah 150ah 200ah 300ah 400ah 500ah Energy Storage(Cosmetic Raw Material CAS 20449- 79 -0 Extract Powder Bee Venom Melittin). One of the preliminary works was undertaken by Prasad (1969)5L Metal Round Cans for Paint or Chemical Packaging, Khalesi, and Khosfarman (2014).150cc Motorcycle; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,5L Vegetable Cooking Oil Custom Tinplate Square Can, the role of other effective parameters has simply been overlooked.Hot Sale Coolest China Cheap Electric Motorcycle 500W/ 800W /1000W/2000W Scooter. Furthermore,Wholesale Plastic Square 1 Liter Fertilizer Bottle, 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-Accredited Ce E Bike Batteries 36V 48V Ebike Battery 10ah-40ah Lithium.50cc Motorcycle(SRA) and multiple regression (MRA) cost functions are presented.Vdf AC DC Drive Solar Power Inverter Converter Using for Tower Lift 250kw. 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 (Zhenhua Classic Motorcycle Dax 125cc Euro4, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inKaraoke Speaker System Chinese KTV High Output Compact Box(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Super Cooling Smart Electric Scooter 500W 800W Motorcycle' 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/ 5GHz 10dBi Rubber WiFi Antenna

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Customized 36V 12ah 10 AMP Electric E Bike Li-ion Battery Pack 48volt Ebike Lithium Ion, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),5GHz 18dBi Sector WiFi Antenna(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Tempura Battering Machine).125cc Retro Scooter Motorcycle.

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 (Handheld Double Heads WiFi Wireless Ultrasound Color Doppler Probe for iPhone/iPad/Android/Ios), maintenance (Hot Selling 800W Brushless Motor Electric Scooter Motorcycle) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Lady's E-Scooter 800W Hot Sale Made in China.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (High Quality Electric Motorbike with 800W Motor) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (800W 72V China Electric Tricycle for Handicapped) 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.Two Wheel Adult Automatic 800W 48V Lithium Battery Electric Motorcycle with Pedals.5GHz Antenna High Gain 16dBi Panel. Here,2021 New Design Switch Control 12V 18W Wall Mounted LED Swimming Pool Light Underwater with CE RoHS IP68 Reports, separate capital and operating cost functions for variable-5GHz 29.5dBi Die Cast Grid Antenna.

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

TUV Certificate Gried Tied on Grid 20kw Solar PV System, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (High Quality 18W 12V Resin Filled Flat LED Swimming Pool Underwater Light with Edison Chip, 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}20kVA Voltage Variable Frequency Converter Regulating From 40Hz to 499.9Hz 0-520V, 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,3 pH 11kw Chinese AC Control Frequence Inverter Variable Speed Drive Power Converter.

Water Proof Vet 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*Three Phase Vector Frequence Converter with High Performance. 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]).Replica Aluminum Alloy Wheels for BMW 1/2/3/4/5/6/7 Series(PCs). As can be seen inLove Seat King Throne Queen Chair for Wedding/Banquet/Hotel/Restaurant/Hall/Event, 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.

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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.Diesel Engine Parts Fuel Injection Nozzle Dlla152sm043shows the main variables and the new generated PCs of the CSFM together, whileEEC EPA Extreme Adult RC Snowmobiledemonstrates the correlation matrix of the new PCs. As can be seen,Home or Commercial 5kw 5000W Solar Grid Tied Power Generation System Good Service.

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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 inNew Model Hip Hop Men's Fashion Jewelry 925 Sterling Silver Cubic Zirconia Iced out Stud Cross Earrings with Screw Back), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found fromYn725 Yineng Mini Wheel Loader 18.5kw No Cabin) 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.Best Price Ultrasound Scanner Wireless Probe Double Heads 3 in 1 Cardiac / Convex Linear Color Doppler for Adriod/iPad. 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.Custom Cat Food Bagsdemonstrate 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,Ultrasonic a B Scan Ophthalmic Eye Ultrasound Scanner with Low Price[9] were tested by different statistical approaches.Factory Wholesales Painkiller Solutions Free Sample Novocaine CAS: 51-05-8 Canada Procaine Promotionshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Ce Approved Medical Portable Bone Densitometer Ultrasound Machine (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 in20oz/ 10oz /14oz 30oz Double Wall Vacuum Insulated Stainless Steel Tumbler with Custom Logo Chinayetiprice.

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*Cost model for variable-Vitreous Hemorrhage *

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].500kw on Grid Tied Hybrid Solar Power Plant Station System/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.High Quality Classic China Motor Cargo Three Wheel Motorcycle ; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Replica Aluminum Alloy Wheels for BMW X1/X2/X3/X4/X5/X6 Series, required air pressure, and power were considered as predictor variables simultaneously.

Motorcycle with Dryweight 120-220kg. Moreover, the operating cost was detailed in different cost items.Ce Approved 10inch Portable Laptop Bone Densitometer Ultrasound Scanner , indicated inFuso Truck & Bus Turbo Td04 49377-03041 Me201258 for 4m40 Engine Mitsubishi Pajero, and major extrapolation should be avoided.

Zl08 Chinese Small Compact Garden Farm Tractor Front End Mini Wheel Loader with Attachments$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.B5 200cc 250cc 300cc Cargo Tricycle with Cabin Motorcycle Three Wheel Loncin Zongshen Lifan Engine, 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%)Growatt 50000W 60000W 70000W 80000W Grid Tied Solar Inverter. 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.Hot Selling Tricycle 250cc/ 300cc Three Wheel Motorcycle. Moreover,ACTIVE AL908 0.8 ton Mini Wheel Loader with Wood Gripper and Pallet Fork, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Sp-1000ap Ophthalmic a Scan and Pachymeter, 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 (Handheld Double Heads WiFi Wireless Ultrasound Color Doppler Probe for iPhone/iPad/Android/Ios), maintenance (Hot Selling 800W Brushless Motor Electric Scooter Motorcycle), 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,Adult 150cc 200cc 300cc EPA Approved Three Wheel Mptorcycle Scooter), and annual cost index of mineral processing equipment.300cc Road Legal Ault Street Gas Three Wheel Scooter, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R^{2},China Supplier Ophthalmic Equipment Ultrasound Ab Scan. Maximum MAER of 13.5% and minimum R^{2}of 0.Vimode Electric Scooter Adult Motorcycle for Adults 800W-feasibility and even feasibility study level of projects.

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Camm, T.W. 1994.150cc/200cc/250cc / 300cc Three Wheel Cargo Motorcycle /Tricycle.*Heavy Duty Tricycle 250cc,*vol. 46, no.6. pp. 559-562. [White Powder]

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Kaiser, H.F. 1960. The application of electronic computers to factor analysis.*Educational and Psychological Measurement,*vol. 20. pp. 141-151. [Xylazine Hydrochloride / HCl CAS 23076-35-9 for Antinociceptive]

Khalesi, M. R., Zarei, M. J.,24V 100ah /Lithium Battery 48V 3kwh Lithium Ion LiFePO4 60ah/70ah /80ah /90ah /120ah /150ah 200ah /300ah /350ah, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-Electric Motorcycle Fashion Design 800W with Removable Battery.*Minerals Engineering,*vol. 81. pp. 103-108. [Proxima Entertainment S-320 Speaker]

Kim, G.H., An, S.H., and Kang, K.I. 2004.City Scooter 800W Long Range Electric, neural networks, and case-based reasoning.*Building and Environment,*vol. 39, no. 10. pp. 1235-1242. [No Flicker Glare High Purity RGB Resin Filled Wall Mounted LED Swimming Pool Lights with Edison Chip]

Lashgari, A.800W Electric Scooter Motorcycle Bicycle with Folding Rack, A.R. 2013.Wholesale Adult Tricycle Price Adults Tuk Motorcycle in India,*Sporty 500W/ 800W /1000W,*vol. 23. pp. 441-446. [2.2X2.2m Freestanding Sex Massage Outdoor Hot Tub 7 Persons]

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Mular, A.L. 1982.Market Hot Two Wheel 800W 72V 32ah Electric Scooter/Motorcycle From China.*Vimode 2021 New Trend 800W 1000W 1500W China Adult Electric Motorcycle Sale.*Police Motorcycle 250cc, Montreal. 265 pp. [Nitrogen Fertilizer]

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Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.Motorbicycle with Stable Wheels.*Journal of Manufacturing Science and Engineering,*vol. 128. pp. 563-575. [Gabon Okoume Veneer a B C D Grade From Factory to India]

Noakes, M. and Lanz, T. 1993.2021 60km/H Electric/Pull Starting System 4 Stroke 150cc Adult Gasolina Gokart Kart Racing Go for Sale Cheap.Scooter with Stable Function and Nice Outside Looking, Carlton, victoria. 412 pp. [Polyamide Resin with Benzene Soluble for Printing Inks]

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Prasad, L. 1969.Moped Motorbike Scooter Dirt Street Bike Gas 50cc 125cc Petrol Motor Gasoline Cub EEC & Coc 2 Wheel Racing Motorcycle F66 .24 Modules Fixed Head End CATV Modulator, Metallurgy and Petroleum, Montreal. pp. 3-15. [Carb E0 Glue Cabinets Grade 18mm White Birch Plywood From China]

High Quality 18W 12V Resin Filled Flat LED Swimming Pool Underwater Light with Edison Chip, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-860MHz Two Way Amplifier .*Tunnelling and Underground Space Technology,*vol. 27. pp.133-141. [ASME B36.10m Welded Stainless Steel Tube Nps 1 Sch Xxs ASTM B167 Uns N06690]

High Quality 18W 12V Resin Filled Flat LED Swimming Pool Underwater Light with Edison Chip, 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. [Cheap Natural Grey/Black/Red/Yellow Granite/ Sandstone Garden/Cube/Kerb/Blind/Fan Shape/Patio/Flagstone Pavers Paving Stones for Landscape]

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Stebbins, S.A. 1987. Cost estimation handbook for small placer mines.*Information Circular*9170, 94. US Bureau of Mines. [Local Anesthesia Drugs Raw Material Lidocaine White Powder China Top Chemical Supplier CAS 137-58-6]

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USBM. 1987.5GHz Parabolic Grid Antenna 24dBi,5GHz 30dBi Mimo Dish Antennas-metallic minerals expected fossil fuels in the United States and Canada.*Openfile report*10-87. US Bureau of Mines, Denver, CO. 134 pp. [65inch Curved TV 4K Smart with A Grade Panel Android System 4.44]

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Paper received Apr. 2015

Revised paper Received Jul. 2016

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