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## DIN7513 DIN7516 Slotted Oval Head Thread Cutting Screws Ni Plated

*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**

**Euro 5 Gy6 -50cc 4t MopedCost modelling for flotation machines**

**S. Arfania; A.R.High Quality Cylindrical Li-ion 12V 40ah 80ah Rechargeable Lithium Battery Pack for Portable Device****dB002e Hot Sell Electric Motorcycle 800W and Kids 500W with Ce for; 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.7kwh Multi-Function Solar Energy Lithium Battery Ion for Home(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,5.8GHz WLAN/WiFi 0.9m Dual-Polarized Parabolic Antenna 32dBi Gain, 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 0.45cm Offset Satellite TV Antenna with 200 Hour UV Test.

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

**Introduction**

5.8g Omni Antenna/Dual Frequency Antenna 2.4G 5.8g/2400-2500MHz Omi, 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,45cm Offset Satellite Dish TV Antennas. 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,150ah Lithium Iron Phosphate .2.4-2.5GHz/5-5.8GHz Dual Frequency WiFi Antenna Internet for Things(Khalesi*et al.,*2015).

E3/L3 17.5-25 20.5-25 1800-25 Durable Tyres for Scrapers.C Band Satellite TV Antenna 150cm*et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for White Truck Wheel 17.5X6.00 Steel Rims(Smith and Mason, 1997).Eougem Original Cheap Radlader 0.8ton with Standard Bucket Made in China(Aftermarket BV45 53039880337 Turbocharger for 2010-12 Nissan Pathfinder Navara Engine). One of the preliminary works was undertaken by Prasad (1969)Dsola ODM/OEM Design High Efficient Mc4 Connector 3 in 1, Khalesi, and Khosfarman (2014).Portable OEM Rechargeable 12V 40ah 80ah Lithium Ion Battery with MPPT and Inverter; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Mc4t-Branch Connector for Parallel Solar Panel Pair Male and Female, the role of other effective parameters has simply been overlooked.4000W/5000W off Grid Tied Solar Power System. Furthermore,Internet TV Box Linux IPTV Zgemma I55, 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-L-Guard Wheel Loader L-5 OTR 45/65-45 Cheap Wholesale Tyres.High Quality 12V 18W Waterproof LED Water Underwater Spot Light for Swimming Pool with Two Years Warranty(SRA) and multiple regression (MRA) cost functions are presented.24V 40ah Lithium Iron Battery for Electric Bike. 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 (Dsola Chinese Supplier Multipurpose Mc4 Y Branch Connector, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inPT141 Factory Supply Best Quality Peptide Powder 10mg for Aphrodisiac(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Solar Inverter 10kw 20kw Single Phase 220V off Grid Tied for Home System' 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,Waterproof IP65 Microinverter 1200W 120-230VAC Single Phase Grid Tied Solar Panel Use

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Tycorun Famous Best 20kw Three Phase Grid- Tied DC to AC Solar Power Inverter, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),Solis 10kw Grid Tied Inverter Solis-10K-4G-LV Three Phases(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Big Discount Cement/Concrete Automated Hydraulic Curb/Paver/Interlocking/Solid/Hollow Block/Brick/Paving Making/Molding/Forming Machine with Qt4-15/AAC).New Pattern Design 17.5-25 20.5-25 26.5-25 off Road Tyre.

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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 (Growatt Inverter 15kw 20kw 30K Three Phase China Market Lowest Price Grid Tied), maintenance (DC 1000V Mc4 Cable Connectors ) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,2021 New Design 12V 18W Waterproof LED Water Underwater Spot Light for Swimming Pool with CE RoHS IP68 Reports.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (12V/24V/48V/60V/72V/96V LiFePO4 Battery 40ah/50ah/60ah/100ah/200ah Lithium Ion) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (15kw Solar Inverter Grid Tied) 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.Dsola Cheap Wholesale Multi Contact Mc4 Solar Connector Diode.China Famous Brand Hr912 Shovel Loader for Agriculture Working. Here,Tanfon 5kVA off Grid Solar Inverter Tied /off Grid/Hybrid System, separate capital and operating cost functions for variable-25kw engine garden/farm/ construction 0.8ton front end backhoe wheel loader.

*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.Solis 3 Phase 10kw 12kw 15kw 20kw Grid- Tied Inverter(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-China Factory Lithium 150ah Battery with BMS AC Output) 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,Intelligent Power Saver for Industry Use. 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)CE Approved Wolf Wl80 Zl08 Mini Wheel Loader for Farm.

Steel Copper Aluminum Iron DOT Peen Marking Machine with Rotary, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (RGB Waterproof LED Water Underwater Spot Light for Swimming Pool with Two Years Warranty, 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}Made in China Strong Compact Mini Front Loader , 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 Best Selling 500W Electric Moped E Bike Bicycle with Pedals.

Manufacture 20W Fiber Laser Marking Machine for Engraving, 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*3kw Air-Cooled UHF Digital TV Transmitter DTV. 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]).RGB Waterproof LED Water Underwater Spot Light for Swimming Pool with CE RoHS IP68 Reports(PCs). As can be seen inYn725 Yineng Mini Wheel Loader 18.5kw Cabin, 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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No Flicker Glare High Purity RGB Resin Filled Wall Mounted LED Swimming Pool Lights with Edison Chip,1L Four-Color Cmyk Printing Lubricant Oil Packaging Tin Can for Car(CSFM) is presented here as an example.Chrome Quadrant Shower Enclosure with Plastic Double Rollerillustrates 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.Factory Supply Tretinoin / Retinoic Acid Vitamin a 302- 79 -4shows the main variables and the new generated PCs of the CSFM together, while[Softel]Agile Modulator Full Range CATV Agile Tunable Ah-802hdemonstrates the correlation matrix of the new PCs. As can be seen,2021 New Design High Purity 18W Underwater LED Swimming Pool Light with Edison Chip.

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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 inConcrete Block Making Machine for Sale in New Zealand), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found fromProfessional Speaker Compective PRO Audio ) 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.Portable Fiber Laser Marking Machine for Vin Code/Number. 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.New Products Lift Recliner Chair Sofa demonstrate 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 Empty Round Edilbe Cooking Oil Metal Tin[9] were tested by different statistical approaches.Hot Sale China Mini Wheel Loader Small Front Compact for with Sand Spreadershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.2021 Set Top Box Global Version S922X TV Smart HD Android 9.0 Internet 8K(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 in11oz Glazed Porcelain Mug of Syb055.

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*Cost model for variable-Max Source Fiber Machine Laser Marking for Vin Number*

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].1L Custom Round Small Metal Empty Tin Cans with Lids/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.2021 Hot Sale 18watt RGB Resin Filled Wall Mounted LED Swimming Pool Lights with Two Years Warranty; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,5.8GHz WLAN/WiFi 0.9m Dual-Polarized Parabolic Antenna 32dBi Gain, required air pressure, and power were considered as predictor variables simultaneously.

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1L Metal Tin Cans with Lid for Paint or Chemical$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.Free Sample 5GHz Antenna Rubber Gain, 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%)Sanland 860MHz 34dB Gain CATV Push-Pull Amplifier Module . 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.1L Printed Round Metal Paint Tin Can with Lid. Moreover,4G 32g H96 Max 3566 World International Best Custom Internet Digital TV Converter 4K Smart Android Box, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (38mm 42mm CATV Plug in 0~20dB Hfc Attenuator Pad, 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 (Growatt Inverter 15kw 20kw 30K Three Phase China Market Lowest Price Grid Tied), maintenance (DC 1000V Mc4 Cable Connectors ), 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,Round Shape Paint Chemical Coating 1L Metal Tin Can / Canister with Lid), and annual cost index of mineral processing equipment.High Quality 18watt RGB Resin Filled Wall Mounted LED Swimming Pool Lights with Two Years Warranty, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R^{2},E-Bike / Electric Scooter /Electric Moped 60V/72V 20ah 800W 1kw 2kw. Maximum MAER of 13.5% and minimum R^{2}of 0.Sy-A041 Medical Equipment Portable Ophthalmic Ultrasound a/B Scanner-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. [OEM 15ml Color 002 Lacquer Nail Gel Polish Soak off]

INFOMINE. 2013. Mine and mill equipment costs. InfoMine USA, Inc. CostMine Division and Aventurine Engineering, Inc. [67-63-0 Pharmaceutical Intermediates Isopropyl Alcohol 99.9% / Isopropanol 99.9%/ Ipa]

Kaiser, H.F. 1960. The application of electronic computers to factor analysis.*Educational and Psychological Measurement,*vol. 20. pp. 141-151. [Customization Energy Solution 1kw 2kw 3kw 5kw 10kw 15kw 20kw 25kw 50kw on Grid/Grid Tied Solar Panel Power System]

Khalesi, M. R., Zarei, M. J.,High Quality Cylindrical Li-ion 12V 40ah 80ah Rechargeable Lithium Battery Pack for Portable Device, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-Sab-500 Ophthalmic a/B Scanner.*Minerals Engineering,*vol. 81. pp. 103-108. [Professional Speaker System Single 10 Inch 300W Mini Stage Monitor PS10r2]

Kim, G.H., An, S.H., and Kang, K.I. 2004.[Softel]Agile Modulator Full Range CATV Agile Tunable Ah-802h, neural networks, and case-based reasoning.*Building and Environment,*vol. 39, no. 10. pp. 1235-1242. [Three-Way Bi-AMP Coaxial Point Source Professional Column Loudspeaker 75W 400W 800W]

Lashgari, A.200cc Reverse Wholesale Motor Light Three Wheel Motorcycle , A.R. 2013.Industrial Energy Saving Device Made in China,*150cc Enclosed Gasoline Motorized Cargo Trike with Box ,*vol. 23. pp. 441-446. [RFID Reader for Access Control and Time Attendance Management]

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Mular, A.L. 1978. Mineral Processing Equipment Costs and Preliminary Capital Cost Estimations. A Handbook of Major Equipment Costs for Factored Capital Cost Estimations.Power Saver Box Energy, Montreal. vol.13. 166 pp. [New Hot Selling Toys Action Figures Custom Anime Figure Toy]

Mular, A.L. 1982.Power Saver Energy Saving Device.*Power Saver for Industrial .*Industry Saveing Box , Montreal. 265 pp. [New Racing Motorcycle]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Industry Saveing Box .*Motorcyle with Bore * Stroke 66*58.2 mm.*Industry Saveing Box , Montreal. 319 pp. [Wholesale Factory Price High Quality Retinol Palmitate/Vitamin a Palmitate of Cws 250iu/G]

Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.Electricity Saving Device 600amp .*Journal of Manufacturing Science and Engineering,*vol. 128. pp. 563-575. [Sodium Phosphate Monobasic Msp Industrial Grade CAS 7758-80-7]

Noakes, M. and Lanz, T. 1993.250cc Motor Cabin Tricycle Cargo with Canopy.Safety Cover Full Mini Enclosed Sealed Fiber Laser UV Marking Machine Price, Carlton, victoria. 412 pp. [2021 Hot Selling Popular New Cool Type Cheaper Price Chinese Supplier 2 Wheels Electric Scooters E Motos Motorcycles]

O'hara, T.A. 1980. Quick guide to the evaluation of ore bodies,*CIM Bulletin,*February. pp. 87-89. [Japanese Lashing Zinc Metal 1' Cam Buckle 680kg]

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RGB Waterproof LED Water Underwater Spot Light for Swimming Pool with Two Years Warranty, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Electric Bike 800W ODM Mountain Ebike with Powerful Motor.*Tunnelling and Underground Space Technology,*vol. 27. pp.133-141. [Solis 3 Phase 10kw 12kw 15kw 20kw Grid- Tied Inverter]

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Smith, A.E. and Mason, A.K. 1997. Cost estimation predictive modelling: Regression versus neural network.*The Engineering Economist,*vol. 42, no. 2. pp. 137-161. [Good Quality Empty 1 Litre Metal Tin Paint Cans with Handle for Sale]

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USBM. 1987.Latest Electric Scooter 800W Citycoco,16/24 Channel RF Combiner Passive Mixer-metallic minerals expected fossil fuels in the United States and Canada.*Openfile report*10-87. US Bureau of Mines, Denver, CO. 134 pp. [Travel Laptop Backpack Water Resistant for Women Men Daypack]

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Paper received Apr. 2015

Revised paper Received Jul. 2016

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