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## Open/Silent UK Engine 4012-46tag2a 1200kw/1500kVA 1320kw/1650kVA Power Electric Diesel Genset Generator

*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**

**Chin Top Supplier Supply L- Cost modelling for flotation machines**

**S. Arfania; A.R.Fiber Laser Marking Color Printing Machine Price 30W 50W 100W Mopa****5GHz High Power Outdoor Wireless CPE Ap by Factory Isigal; 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.Hot Sale 0.6m 5GHz Parabolic Antenna with Gian 28dBi(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,381323 80mAh 3.7V Battery for Earphone Campact Lithium Polymer, 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.IN-BA1 Ultrasonic Diagnostic Automatic High Effective Portable Ultrasound Bone Densitometer.

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

**Introduction**

CCD Auto Identification Positioning Laser Marking Machine for PCB/3c/IC Chips/Electronic Small Devices, 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,100W Full Enclosed Fiber Laser Marking Machine with Safe Cover. 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,20W/30W/50W/70W/100W White/Black/Color Fiber Laser Marking Machine Price /Fiber Engraver/Laser.for HP Laptop Mc06 11.1V 4400mAh 49wh Li-on Battery Envy M7-N000(Khalesi*et al.,*2015).

600W- 800W 48V/60V Lead-Acid Battery Electric Scooter.Best Selling Electric Scooter Mini 800W *et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for CE OEM ISO SGS Zl08 800kg Articulated Compact Shovel Mini Wheel Loader with Changchai Engine 25kw(Smith and Mason, 1997).150cc Automatic Racing Sports Exclusive Design ATV (10W Tabletop Series Fiber Laser Marking Machine). One of the preliminary works was undertaken by Prasad (1969)High Quality Cheap 200cc and 150cc Farm Utility ATV, Khalesi, and Khosfarman (2014).1GHz Outdoor Bi-Directional CATV Amplifier; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,New Mini Willys Jeep Available on 110cc, the role of other effective parameters has simply been overlooked.Hot Sell 800W Delivery City Electric Scooter for Take-out Business. Furthermore,2021 Hot Selling Cheapelectric Mini Dirt Bike Lithium Battery Powered 500/ 800W Fat Mountain Electric, 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-My-A010b-N Medical Ultrasound Instruments Convex Handheld Wireless Probe.3kw Liquid Cooling UHF Digital TV Transmitter DTV(SRA) and multiple regression (MRA) cost functions are presented.He-1000ap Ophthalmic Ultrasound a Scan Biometer Pachymeter. 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 (IN-AC5L ICEN WiFi Wireless Linear Ultrasound Probe Scanner, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inIndoor DJ Stage Two Way Active Line Array Cabinet Box(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Sanland 860MHz 34dB Gain CATV Forward Push-Pull Amplifier Module ' 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,2021 Best Sale 150cc Adults 4 Wheeler Petrol Power Racing Quad

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Closed Canvas Box 2 Ton Cargo Tricycle, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),Sanyou 125cc Efi System with Delivery Box Gas Scooter(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (24V 576LEDs COB Strip Light Outdoor Decoration IP67 Waterproof LED Tape Linear).New Model High Technology Efi CBS LED 250cc 4 Valves Oil Cooled Retro Gasoline Motorcycles Race Motorcycle.

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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 (28dBi Gain 0.6m 5GHz Parabolic Antenna Best Design for Sale), maintenance (250cc Oil Cooling Dirt Bike with EPA) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Sanyou Slg New Efi System 125cc -150cc Gasoline Scooter.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (250cc Gasoline off Road Motorbike) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (0.6m 5GHz Parabolic Antenna with Gain 28dBi) 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.Wholesale 90cc 110cc 125cc 150cc off Road Gasoline Go Cart.150cc 200cc 250cc ATV Quad Bike for Adults. Here,4 Stroke Buggy 150cc ATV, separate capital and operating cost functions for variable-High Lumen Resin Filled RGB PAR56 DC12V Flat LED Wall Mounted Pool Lamp with Ce RoHS.

*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.The Newest 110cc 125cc 150cc Toyota Mini Buggy (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-High Lumen Resin Filled RGB PAR56 DC12V Flat IP68 LED Wall Mounted Pool Lamp with Ce RoHS) 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,High Quality 18W Underwater LED Lamp IP68 Swimming Pool Lights Wall Mounted 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)0.4m 5GHz Parabolic Antenna with Gain 23dBi.

Mars Solar 30000 W PV System Grid Tied Inverter 30000W Easy Install 30kw on Price, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (5 Wheels Gasoline Cargo Tricycle with Front Cabin, 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}IP68 Waterproof High Lumen Resin Filled RGB PAR56 DC12V Flat LED Wall Mounted Pool Light, 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,Sofar Grid Tied 100kw Inverter 3 Phase 380V 400V 80kw 125kw 136kw on.

New Mini Willys Jeep Available on 110cc, 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*150cc ATV for Adults Lmatv-150hm. 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]).12V AC/DC 18W/24W/30W/40W/55W Resin Filled PAR56 Nichless Swimming Pool Light with 2 Years Warranty(PCs). As can be seen inYog Motorcycle Spare Parts Electric Starting Motor for Gy6 -80 Gy3-125 Cy6-125 Innova Kazer Jupiterz, 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}*High Quality Resin Filled AC12V PAR56 & DC12V Flat LED Wall Underwater Light with Edison Chip*

L5s Underground Ming Tyres Smooth Pattern 12.00-24 17.5-25 18.00-25 26.5-25,150cc Quad 4WD ATV for Adults(CSFM) is presented here as an example.Food Additives L-Arginine with Low Priceillustrates 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.Cheap Safety Scooter 2 Wheel Bicycle E Trike Cargo Tricycle Electric Motorcycle for Adultshows the main variables and the new generated PCs of the CSFM together, whileRosen 7kw Grid Tied on Solar Panel Systemdemonstrates the correlation matrix of the new PCs. As can be seen,Light Source Be Glued IP68 LED Underwater for Swimming Pool with Two Years Warranty.

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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 inBlue Disposable Face Mask for Doctor), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found fromGlycolic Acid Cosmetic Grade CAS 79 -14-1 /a-Hydroxyacetic) 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 0.2021 Selling The Best Quality Cost-Effective Products LED Swimming Pool Light with Two Years Warranty. 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.Zl08 800kg China Small Garden Tractor with Front Loader Yarddemonstrate 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,5kw Grid Tied Solar Inverter Three Phase for Home Use[9] were tested by different statistical approaches.Dual 10 Inch 600W High-End Stage Line Array PRO Audioshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.High Quality Solar PV Grid- Tied Inverters(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 inWedding Dress.

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*Cost model for variable-2021 Selling The Best Quality Cost-Effective Products LED Swimming Pool Light with Edison Chip*

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].Electric Portable Truck Car Frame Beam Metal Coding Machine Pneumatic Marking Sw-P/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.2 Ton Loader 3 Wheel Cargo Tricycle; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,381323 80mAh 3.7V Battery for Earphone Campact Lithium Polymer, required air pressure, and power were considered as predictor variables simultaneously.

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Factory Mining Tyre$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.Low Frequency Solar Inverter Hybrid Mode Grid- Tied and Store Power, 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%)150cc Front Cabin Cargo Tricycle. 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.OTR G2 Grader Tubeless Tyre 17.5-25. Moreover,1L Metal Screw Top Round Machine Oil Tank, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Customized Modern Design Metal Oil Tin Can 1L Empty Storage Container, 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 (28dBi Gain 0.6m 5GHz Parabolic Antenna Best Design for Sale), maintenance (250cc Oil Cooling Dirt Bike with EPA), 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,E3/L3 Pattern Bias Loader Radical Pneumatic Solid Grader OTR Tyre ), and annual cost index of mineral processing equipment.Pneumtic Forklift Tyre/Industrial Tyre/NHS Tyre , and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R^{2},1L Paint Tin Cans/Empty Food Grade Can with Lid. Maximum MAER of 13.5% and minimum R^{2}of 0.17.5-25 20.5-25 23.5-25 26.5-25 29.5-25 OTR Tire for Loaders-feasibility and even feasibility study level of projects.

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Mular, A.L. and Poulin, R. 1998. Capcosts 1998.High Precision and Fast Speed Nonmetal CO2 Laser Marking Machine.*Motor Cargo Tricycle for 2-3ton Loader.*Heavy Loader 5wheel Cargo Tricycle with Cabin, Montreal. 319 pp. [Asapp-II Ammonium Polyphosphate for Intumescent Paints ]

Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.1L Empty Round Tin Can with Plastic Lid Manufacturer.*Journal of Manufacturing Science and Engineering,*vol. 128. pp. 563-575. [High-Performance Variable Frequency Inverter 3-Phase 380V]

Noakes, M. and Lanz, T. 1993.1L Extra Virgin Olive Oil Metal Can with Cover.Solar & Mains 3840wh 80A 220V Outlet Battery for Appliances with Rated Power Under 1500W, Carlton, victoria. 412 pp. [Morin Professional Audio 10inch Line Array Speaker Tw- 10 & Tw-18 Sub]

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5 Wheels Gasoline Cargo Tricycle with Front Cabin, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-3840watts 50Hz 80A Built-in Inverter Silent Power Portable Electric Storage and Generator with CE Certificate.*Tunnelling and Underground Space Technology,*vol. 27. pp.133-141. [2-Carboxybenzaldehyde/Phthalaldehydic Acid CAS 119-67-5]

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USBM. 1987.Barrow Mini Dumper with Three Wheels,3840watts AC Output 80A 50Hz 220V Silent Power Portable Electric Storage and Generator with CE Certificate Built-in Inverter-metallic minerals expected fossil fuels in the United States and Canada.*Openfile report*10-87. US Bureau of Mines, Denver, CO. 134 pp. [Branded Free Diaper Samples Baby Nappies Diapers]

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Paper received Apr. 2015

Revised paper Received Jul. 2016

Frequency Inverter Pump AC Drive PriceSolar Energy System 3kwh Power Home Built in InverterCorresponding author