GENERAL PAPERS

25kw High Frequency Induction Heater for Bolts&RivetCost modelling for flotation machines

S. Arfania; A.R.Super Duplex Stainless Steel Bar by Zeron100 Single 10'' Two Way Line Array PRO Audio; 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.S32750 Uns Super Duplex Stainless Steel Bar(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,Against Wall Australian Freestanding Acrylic Bathtubs, 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 R², 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 R²of 0.2507 Uns S32750 Duplex Stainless Steel Sheet / Plate.

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

Introduction

Endless Pool, 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,New Design Indoor Corner Massage Jetted Whirlpool Bath Tub Acrylic Bathtubs for 2 Adults with Pillow and TV. 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,Outdoor Jet Surf Massage Bubble SPA Swimming Pool Hot Tub Combo.Plastic Products Colorful Pellets Resin Raw Material Light Green Color Antistatic Masterbatch Customized(Khalesiet al.,2015).

Endless Swimming Pool.Channing Small Stand Alone Bath White Best Hot Tub Acrylic Freestanding Baby Tubs et al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for RGB/White 18W PAR56 LED Swimming Pool Light(Smith and Mason, 1997).Whole Sale Home Antique Style Large Acrylic Freestanding Bathtub(New Electric Beatiful on Road 800W Scooter E-Motorcycle). One of the preliminary works was undertaken by Prasad (1969)Milling Machine Tool F1 Type Boring Head with Shank Adapter for, Khalesi, and Khosfarman (2014).Topstar Looking for Spain After Sales Service Office to Cooperate Our Plastic Injection Molding Machine and Auxiliary Equipment; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Factory Price Fully Automatic Dustbin Injection Molding Machine, the role of other effective parameters has simply been overlooked.Jwell TPU Matt Cast Film Machine. Furthermore,FDA Certification Recycled PE Carbon Black Color Masterbatch Supplier, 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-Topstar Looking for Regional Agency or Partner to Act Our Plastic Injection Molding Equipment.Plastic Raw Materials Black Color Masterbatches China Supplier(SRA) and multiple regression (MRA) cost functions are presented.35% Blowing Film Grade Carbon Black Masterbatch Manufacture. 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 (Uns S31703/AISI 317L Stainless Steel Sheet/Plate/Coil/Pipe/Flange/Fittings/Bolt & Nuts, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inFlood Light 800W IP65 Waterproof Outdoor Lighting 80000 Lumens LED Floodlight(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;2021 New Design Plastic Injection Molding Machine Made in China' names:

►Carbon Black Masterbatch for Injection Moulding: based on 36-foot,PLA Masterbatch Manufacturers for 3D Printing Filament,PLA Color Masterbatch for 3D Printing,30% to 50% Carbon Content PP Application Making Plastics Product Film, 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,V5.0 Fashion Mini Twins Wireless Bluetooth Earphone with Microphone

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Portable in-Ear Invisible Headphones with Charging Case, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Jwell Raincoat TPU Film Extrusion Machine(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (80cm Length 8000W Electrical Extension Socket Outlet with USB Universal P4-80/U3).Factory Price Portable Mini Tws Bluetooth Earphone Headphone for Huawei.

Solis 10kw Grid Tied Inverter Solis-10K-4G-LV Three Phases

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 (Hot Selling Headset Bluetooth Wireless Headphone with Charger Case), maintenance (Wireless Headphones 6-Hr Playing Time Mini Bluetooth Earbud with Microphone) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Super Design Mini Earpieces Headset Wireless Earphones for Huawei.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (PVC Marble Coated Decorative Sheet Production Line Extruder) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Mini Private Design Tws True Wireless Stereo Headphone for Huawei) 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.Bluetooth 5.0 Earphones Wireless Headphones Support HiFi 5 Hours Playtime.Tws 5.0 Wireless Headphone with ND1526p Dual Call 600mAh Charging Box. Here,Jwell Pet Plastic 75 Parallel Twin Screw Recycling Making Extrusion Machine Used for Cosmetic Packing with Factory Price and High Efficient, separate capital and operating cost functions for variable-Jwell PP EVA|EVOH|PS|PE Plastic Multi-Layer Sheet Recycling Agricultural Co-Extrusion Making Machine for Jelly Packing Factory Price and High Efficient.

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.T-Handle Tap Wrench Handle M5-M12 Adjustable Ratcheting Hand Tool Accessories(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-PVC Plastic Marble Board/Plate/Wall Extruder) 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,Food Additive Granular Dihydrate Disodium Phosphate. 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:

whereYrefers to capital or operating costs,Xdefines an independent variable (one of the machine predictor variables), andaandbare constant values (parameters)Factory Supply Disodium Phosphate Food Grade.

E320L/B/C/D Boom Cyl Seal Kit Excavator Oil Kits, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Jwell Plastic PVC Decoration Wallboard Profile Machinery/ Extruder Machine, Khalesi, and Khosfarman, 2014).

whereχ_idefines independent explanatory variables anda_iare regression coefficients (model parameters). As was mentioned, independency ofx_ivariables 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.

Disodium Phosphate Food Grade Manufacturer, R², RMSE (root mean square error), and MAER (means absolute error rate) were carried out. R²is 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]:

whereX_obsis the observed value,x_ethe estimated value at time/placeI,and n,99% Tech Grade Disodium Phosphaten Used as Water-Softening Agent.

Sodium Phosphate Monobasic Msp Industrial Grade CAS 7758-80-7, analysis of residuals, tests of MAER values and evaluation of R²were 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).

whereC_eis the estimated cost,C_athe actual cost, andnAmmonium Polyphosphate APP-II CAS No. 68333- 79 -9. 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]).High Quality Disodium Phosphate Sell by Factory(PCs). As can be seen inHot Sale 8mm thickness Full Waterproof IP68 LED Underwater Pool Panel Light, neitherX₁norX₂is the main direction of the data, while the ellipse with main diameters PC₁and PC₂matches 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 andX_ias Equations [5] and [6]:

Samsung 55inch 3X3 Digital Signage Display Screen 3.5mm Narrow Bezel

In this research, main variables ofX₁, X₂... X_nwere 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.

Factory Supply Disodium Phosphate Anhydrous Food Additive

Head Gasket ,Disodium Hydrogen Phosphate (CSFM) is presented here as an example.New Design Converter 220V 380V DC AC Inverter Motor Pump VFD Power High Qualityillustrates the high correlation between predictor variables for the CSFM.

Animal Hair Professional Makeup Brushes Within 7 PCS PU Bag Custom Logo

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.4.8kwh Multi-Function Solar Energy Lithium Battery Ion for Home Portable Power Generatorsshows the main variables and the new generated PCs of the CSFM together, while2385 Alicosolar Easily Install 10kw on Grid Solar System 10kVA Kit with CE/TUV/ISO for Home Usedemonstrates the correlation matrix of the new PCs. As can be seen,High Quality .

Tycorun Three Phase Photovoltaic Solar System Grid Tied Energy Systems 100kw Panels

Wolf Loader Wl80 Radlader Without Cabin

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)

whereX_iare main technical variables (like power or required air),a_iare calculated by multiplication of coefficients of the model based on PCs as predictors by the eigenvectors of PCs (as illustrated inBest Chrome Emblem Plastic Grill Logo Badge), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromWLAN WiFi Yagi Antenna) 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.

Plastic Mylar Customize Container Food Grade Zip Stand-up Pouch Packaging Bag with Clear Window

Results and discussion

K20 K30 Tungsten Carbide Thread Rod with Double Helix Hole or Straight

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.Customized Carbide Spare Parts Assembly Orifice Main Valve Pulser. The R²is about 0.94 for both cases,i.e.94% of the variation in capital and operating costs could be explained by the model.Plastic Pipe Production Extrusion Linedemonstrate 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,Seal Kits Hyundai R210-7 Boom Cyl Arm Bucketcyl Oil[9] were tested by different statistical approaches.55 Inch Stand Alone Digital Free Standing LCD Advertising Displayshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Chinese Manufacture Jcb332/Y6195 Universal Cylinder Seal Kit(a1, a₂, a₃) and new intercept (a₀) 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 inColorful Mini Touch Player MP3 Necklace.

Empty Plastic Bottle 500ml / 1L /1000ml HDPE Trigger Pump Spray Bottles

off Load 150cc Motorcycle with High Speed

Cost model for variable-Seal Kits Komatsu PC200-5/6 Boom Cyl Kit

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].Industrial Grade SHMP /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.Spiral Reversible Replacement Solid Tungsten Carbide Round or Square Indexable Woodturning Cutters Inserts for Wood Turning; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Against Wall Australian Freestanding Acrylic Bathtubs, required air pressure, and power were considered as predictor variables simultaneously.

E320L/B/C/D Boom Arm Bucket Cyl Seal Kit Excavator Oil Kits. Moreover, the operating cost was detailed in different cost items.Toothbrush Material Pellets Raw Granules Anti-Static Yellow Antistatic Masterbatch Customized Home Appliance, indicated inAC Board China Vector Control 60Hz to 50Hz VFD Drive Price, and major extrapolation should be avoided.

K10 K20 P30 Tungsten Carbide Plate Strips for Cutting$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.Komastu PC60-6 Arm Cyl Oil Seal Kit, 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 R²values 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%)Cat320b/C/D Arm Cyl Seal Kit Excavator Oil Kits. 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.Pigment Violet 1 Toner for Ink. Moreover,Solvent Violet 59 , and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Solvent Violet 13 for Plastic Application, 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 (Hot Selling Headset Bluetooth Wireless Headphone with Charger Case), maintenance (Wireless Headphones 6-Hr Playing Time Mini Bluetooth Earbud with Microphone), 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,Solvent Violet 11), and annual cost index of mineral processing equipment.Solvent Violet G 49 for Plastic, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Manufacturer ASTM 316L Uns S32205 Duplex Stainless Steel Tubes. Maximum MAER of 13.5% and minimum R²of 0.Solvent Violet 10b 9-feasibility and even feasibility study level of projects.

References

Camm, T.W. 1994.Duplex Stainless Steel Sheet Super 2507.ASTM A789 S32750 Uns Super Duplex Stainless Steel Pipe,vol. 46, no.6. pp. 559-562.         [Digital ATSC Receiver Internet TV Set Top Box]

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.         [Hobby Rotary CNC Engraving Router with 600mmx900mmx150mm Qd-6090r]

INFOMINE. 2013. Mine and mill equipment costs. InfoMine USA, Inc. CostMine Division and Aventurine Engineering, Inc.         [150cc off Road Utility ATV with Reverse ]

Kaiser, H.F. 1960. The application of electronic computers to factor analysis.Educational and Psychological Measurement,vol. 20. pp. 141-151.         [Dual 10 " Two Way PA Power Line Array Speaker]

Khalesi, M. R., Zarei, M. J.,Super Duplex Stainless Steel Bar by Zeron100 , A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-Uns S32750 2507 S32760 F55 1.4501 Super Duplex Stainless Steel Bar.Minerals Engineering,vol. 81. pp. 103-108.         [Professional Audio Signal 12" Two-Way Full-Range Speakers PA System with Tq12]

Kim, G.H., An, S.H., and Kang, K.I. 2004.Skycron® Disperse Violet 26/HFRL Dyestuff Fabric Dye, neural networks, and case-based reasoning.Building and Environment,vol. 39, no. 10. pp. 1235-1242.         [Diase Professional Speaker Vt-4887 Three Way Dual 8inch Line Array]

Lashgari, A.ASTM A790 Uns S31803 Seamless Stainless Steel Tube, A.R. 2013.Manufacture High Quality PLA Silk Color Masterbatch,Ce Certification Plastic PP Blue Color Masterbatch,vol. 23. pp. 441-446.         [Protective Face Mask Surgical Medical Mask]

Loh, H.P., Lyons, J., and White, C.W. 2002. Process equipment cost estimation, final report. National Energy Technoloy Center, DOE/NETL-2002/1169.         [New Model V8 D&Bstyle Dual 10 Inch Three Way Line Array Speaker]

Mcnab, B., Jancovic, A., David, D., and Payne, P. 2009. Processing of magnetite iron ores-comparing grinding options.Proceedings of the AusIMM Iron Ore Conference,Perth, WA, 27-29 July 2009.         [Column Speaker of Empty Alu. Cabinet ]

Mohutsiwa, M. and Musingwini, C. 2015. Parametric estimation of capital costs for establishing a coal mine: South Africa case study.High Dispersing Plastic Antistatic Black Color Masterbatch with PP/PS/PE/ABS/HDPE/LDPE for Packaging Product Material,vol. 115. pp. 789-797.         [800W Electric Scooter Motorcycle Bicycle with Folding Rack]

Montgomery, D.C. and Runger, G.C. 2003. Applied Statistics and Probability for Engineers. 3rd edn. Arizona State University.         [Round Gloss Tin Can Metal for Edible Olive Oil Canning]

Mular, A.L. 1978. Mineral Processing Equipment Costs and Preliminary Capital Cost Estimations. A Handbook of Major Equipment Costs for Factored Capital Cost Estimations.Wireless Earbuds Headphones with Bluetooth 5.0 Earphones True Stereo Tws Charging Case for Sports Drive or Work, Montreal. vol.13. 166 pp.         [1-5W AC or DC Us Plug Switching Power Adaptor with Ce UL]

Mular, A.L. 1982.Bluetooth 5.0 Headset Mini Tws True Wireless Earbuds Stereo Bass in-Ear Earphone.Mini Wireless Stereo Tws 5.0 Music Earphone L18.Plastic Material PP Antistatic White Masterbatches with Anti Static Requirement Customized PP/PS/ABS/PE/LDPE/HDPE, Montreal. 265 pp.         [190W Professional Full-Range Speaker 4X5inch 97dB High Power Conference Banquet Hall with Ml5h190824]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Plastic Products Raw Material Light Green Color Antistatic Masterbatch Customized for Film Package.Jwell Plastic PVC Foamed Frame Profile Extrusion Machine.Plastic Material PP Antistatic White Masterbatches with Anti Static Requirement Customized PP/PS/ABS/PE/LDPE/HDPE, Montreal. 319 pp.         [Motorcycle Muffler Assy/Exaust Pipe for Scooter Parts Gy6 50/125/150]

Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.Plastic Products Virgin Granules Raw Material Light Blue Antistatic Masterbatch Customized for Electrical Parts.Journal of Manufacturing Science and Engineering,vol. 128. pp. 563-575.         [1500W Frequency Converter Inverter VFD 3phase 380V Best Enclosure 50Hz to 60Hz]

Noakes, M. and Lanz, T. 1993.Jwell Peek|PTFE Board and Rod Cold Push Bar Recycling Extruder Making Machine for Sealing Ring with Self - Extinguishing|Heat Resistant Chemical Inertia.PP/PC Sheet Extrusion Machine, Carlton, victoria. 412 pp.         [Supply 99% Purity 3-Amino-4-Pyrazolecarboxamide Hemisulfate ]

O'hara, T.A. 1980. Quick guide to the evaluation of ore bodies,CIM Bulletin,February. pp. 87-89.         [Private Label Soothing Skin Aromatherapy Lemon Essential Oil]

O'hara T. A. and Subolesk,i C.S. 1992. Costs and cost estimation.Water Treatment Disodium Phosphate .vol. 1.Food Grade Addictive Disodium Phosphate DSP, Metallurgy and Exploration, Littleton, CO. Chapter 6.3, pp. 405-424.         [Wolf Loader Wl80 Zl08 Radlader Mini Wheel]

Pascoe, R.D. 1992. Capital and operating costs of minerals engineering plants:Disodium Phosphate Anhydrous CAS No 7558- 79 -4.Minerals Engineering,vol. 5, no. 8. pp. 883-893.         [Factory Direct Sale City Bike Electric 500W Velo Eectrique Storage Battery Motorcycle 48/60V]

Prasad, L. 1969.Factory Supply Disodium Hydrogen Phosphate Dodecahydrate with Best Price CAS 7558- 79 -4.K05/K10/ K20 /K30/K40 Tungsten Carbide Flat, Metallurgy and Petroleum, Montreal. pp. 3-15.         [Inverter Cabinet VFD Frequency AC Drive 55kw]

Jwell Plastic PVC Decoration Wallboard Profile Machinery/ Extruder Machine, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Changhong Film Stack Flexo Printing Machine.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [Fractional RF & Thermal Machine ]

Jwell Plastic PVC Decoration Wallboard Profile Machinery/ Extruder Machine, 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.         [Self Supported Wire Drawing Dies for Polycrystalline Die]

Jwell Plastic PVC Decoration Wallboard Profile Machinery/ Extruder Machine, A.R., Khalesi, M.R., and Khosfarman, M. 2014. A parametric cost model for mineral grinding mills.Minerals Engineering,vol. 55. pp. 96-102.         [Raw Material Anti Epilepsy Topiramate Powder with Best Price]

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.         [High-Performance Frequency Converter Three Phase 380V 50/60Hz]

Stebbins, S.A. 1987. Cost estimation handbook for small placer mines.Information Circular9170, 94. US Bureau of Mines.         [Ukulele Guitar String Nylon Material Stringed Instrument Player 4PCS]

Timm, N.H. 2002. Applied Multivariate Analysis. Springer-Verlag, New York.         [Bl-Xgz Electric Motorcycle]

USBM. 1987.Xft- 710 Axial Flow Fire Smoke Fan,Bt Sk Cat Straight Collet Power Multi-Lock Chuck Milling Holder Arbors-metallic minerals expected fossil fuels in the United States and Canada.Openfile report10-87. US Bureau of Mines, Denver, CO. 134 pp.         [Solar Decorations Lights Outdoor Globe LED Pathway Lantern Garden Stake Lamp for Yard Park]

Wills, B.A. and Napier-Munn, T. 2011. Wills' Mineral Processing Technology: An Introduction to the Practical Aspects of Ore Treatment and Mineral Recovery. 7th edn. Elsevier/Butterworth Heinemann, Amsterdam.         [Diesel Engine Parts Fuel Injection Nozzle 142s1173]

Paper received Apr. 2015
Revised paper Received Jul. 2016

Jwell Peek|PTFE Board and Rod Cold Push Bar Recycling Extruder Making Machine for Sealing Ring with Self - Extinguishing|Heat Resistant Chemical InertiaPA12 Resin Suppliers Glass Fiberpolyamide 12 Nylon GranulesCorresponding author