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## Pet Bottles 50ml Amber Green Pink Plastic Bottle with Aluminum Screw Caps

*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**

**PA Power DJ Audio SpeakerCost modelling for flotation machines**

**S. Arfania; A.R.Steel Grade Nitrogen 20.5% Ammonium Sulphate****99% Dibucaine Cinchocaine Best Price Pharmaceutical Hydrochloride Powder; 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.Nitrogen Fertilizer(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,Cheap Price Fertilizer Ammonium Sulphate Steel Grade, 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.Nitrogen Fertilizer Caprolactam Grade Granular CAS No. 7783-20-2 N21% Ammonium Sulphate.

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

**Introduction**

Cheap Price Fertilizer Ammonium Sulphate Blue Star 21%, 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,Urea Fertilizer/ Ammonium Sulfate with Steel Grade. 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,Agriculture Ammonium Sulphate Caprolactam 25kg Package.High Quality Ammonium Dibutyl Dithiophosphate 95%(Khalesi*et al.,*2015).

L18 /8693 Falante Professional 18inch Subwoofer 1200W New Product China Supplier.N21% Nitrogen Fertilizer Ammonium Sulphate Factory Price*et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 98dB 250W Professional Self-Powered Active Audio Speaker Two-Way Inside Amplifier Line Array System with Vs10190905(Smith and Mason, 1997).Plants Ammonium Sulphate Granular 20.5%Min(150CC Go Kart ). One of the preliminary works was undertaken by Prasad (1969)Chemical Factory Sale Ammonium Sulphate Fertilizer Granular, Khalesi, and Khosfarman (2014).Caprolactam Grade Ammonium Sulfate Soa Fertilizer Sulphate; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,20.5% Nitrogen Steel Grade Ammonium Sulphate in Agriculture, the role of other effective parameters has simply been overlooked.Nitrogen Fertilizer Caprolactam Grade Ammonium Sulphate. Furthermore,Nitrogen Fertilizer Steel Grade as From China Factory, 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-Nitrogen Chemical Fertilizer Ammonium Sulfate 21%Min.White Crystal Steel Grade Ammonium Sulphate with N20.5%(SRA) and multiple regression (MRA) cost functions are presented.Floating Agent Ammonium Dibutyl Dithiophosphate Supplier. 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 (Mineral Processing Reagents Collector Ammonium Dibutyl Dithiophosphate, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in18" Fane Style Aluminum Speaker Frame(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Nitrogen Fertilizer Ammonium Sulphate for Agriculture' 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,Crystal Fertilizer Ammonium Sulphate for Coumpound

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Raw Material of Making Compound Fertilizer Ammonium Sulfate N1%, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),Vegetable and Fruit Fertilizer Crystal Caprolactam Grade Ammonium Sulphate(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (The Most Fashionable Men's Sweater).Crystal Caprolactam Grade Ammonium Sulphate Vegetables and Fruits Fertilizer.

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 (Hipower Top 10 Speakers Professional Audio PA Loudspeaker 8ohm), maintenance (Professional Audio PA Subwoofer Component Speakers) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,650W-18 Inch Subwoofer Speaker Manufacture China Factory Directly.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Nh4 2so4 Chemical Formula for Ammonium Sulfate Fertilizer) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (280mm Magnet) 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.Bocinas Prosound 18 Pulgadas PRO Speaker Ruidoso Audio Subwoofer Parlente Hot Sale.Professional Audio PA Subwoofer Component Speakers Bocinas. Here,L18 /86130 100%Good Feedback! Professional 18 Inch PA Speaker 1000W RMS Subwoofer, separate capital and operating cost functions for variable-Additive PE Green Color Masterbatches Manufacturer.

*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.L18 /86131 Falante Professional 18inch Subwoofer 700W New Product China Supplier Hot Sale(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-L18 /86138-Good Feedback! Professional 18 Inch PA Speaker 1500W RMS Neodymium Subwoofer) 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,L18 / 6620- 18 Polegadas PRO Audio Subwoofer Alto Falante 650W. 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)OEM Custom Square Rectangle Round Rubber Cover.

N21% White Granular Ammonium Sulphate, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Vegetable and Fruit Fertilizer Ammonium Sulfate Nitrogen 21%, 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}Agriculture Fertilizer N 21% Ammonium Sulfate, 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,21% Fertilizer Ammonium Sulphate Caprolactam Grade Crystalline.

Agriculture Fertilizer Nitrogen 21% Ammonium Sulfate China Factory, 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*Power Steel Grade Nitrogen 20.5% Industrial Ammonium Sulphate Chemical Fertilizer. 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]).White Extrusion Granular Ammonium Sulphate China Factory(PCs). As can be seen inRectangle Sliding Strip Glass Door Quadrant Bathroom , 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}*Granular Grade Ammonium Sulphate N20.5% Nitrogen Fertilizer*

Nitrogen Fertilizer Color Granular Ammonium Sulphate 20.5+24s,China Suppliers Alone Type Wraped Beam Disc Machenism Padlock(CSFM) is presented here as an example.Lp Electric Guitar on-on-on Control Switchillustrates 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.Portable Themagic Fractional RF Machine for Skin Tighteningshows the main variables and the new generated PCs of the CSFM together, while96dB 250W AES Professional Full Range Two-Way Speaker Sinlge 10inch KTV Disco Occasion System with Ks10190902demonstrates the correlation matrix of the new PCs. As can be seen,Dust Proof Steel Shackle Padlocks with Master Key.

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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 inWiner SPA Jacuzzi J245 Retailers 12 Person Hot Tub), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found fromFast Ship 800W 1000W 1200W 60V 72V 20ah Battery Electric Motorcycle From China) 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**

*Padlock-G38PDP*

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.Breaker Lock. 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.Grade Uns N08330 Stainless Steel Roddemonstrate 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,Padlock[9] were tested by different statistical approaches.Filmfaced Plywood with High Quality and Cheap Priceshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Alone Type Wraped Beam Leaves Iron Padlock (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 inTall Bathtubs/Silver Bathtub/Glass Bathtub Freestanding.

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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].Gt1544s 454083-0001 1002829 Garrett Engine Turbo for Vw Passat/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.Engine Parts Turbocharger for Mercedes-Benz Om906 La K27.2 Om366/Om642/Om362/Om441/Om442/Om447/Om457; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Cheap Price Fertilizer Ammonium Sulphate Steel Grade, required air pressure, and power were considered as predictor variables simultaneously.

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Truck Parts Turbocharger for Mercedes-Benz/Chrysler/Dodge Om647 Gt2256 6470900280 736088-0003$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.FPM FKM Viton EPDM SBR Cr Silicone NBR Rubber Parts, 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%)Gt1541V 704765-0003/708450-0018 Turbine Wheel Shaft for 700960-0011. 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.Gt1544sm 733783-5007s Turbo for Volkswagen Fox 1.4L Tdi Engine Bnm. Moreover,Cosmetic Grade 99% Purity All Trans Retinoic Acid 302- 79 -4 Tretinoin/Vitamin a, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Customized Rubber Spacer Black Silicone Bushing, 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 (Hipower Top 10 Speakers Professional Audio PA Loudspeaker 8ohm), maintenance (Professional Audio PA Subwoofer Component Speakers), 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,Gym Rubber Flooring Floor Mat Roll), and annual cost index of mineral processing equipment.Ihi Turbocharger 2001-04 Peugeot, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R^{2},Gt1749V . Maximum MAER of 13.5% and minimum R^{2}of 0.2004-10 for Volkswagen-feasibility and even feasibility study level of projects.

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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. [China Exwork Price Emla Cream Raw Materials Lidocaine Prilocaine Local Anesthetic Powder CAS: 1786-81-8]

Khalesi, M. R., Zarei, M. J.,Steel Grade Nitrogen 20.5% Ammonium Sulphate, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-Gtb1749vk Turbo Cartridge 798128-0004 for 2011- Peugeot Boxer.*Minerals Engineering,*vol. 81. pp. 103-108. [Matt Food Packaging Child Proof Zipper Plastic Stand up Pouch Water &Air & Smelly Kraft Film Laminated Food&Tea&Coffee&Candy Bag]

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Lashgari, A.Gt1749vk 798015-0002 A6710900380 Turbo for Ssang-Yong Korando C200 2.0 D20dtf Engine, A.R. 2013.Gt1544V 740611-5002s 28201-2A400 Turbo for Hyundai Verna,*Aftermarket BV45 53039880337 Turbocharger for 2010-12 Nissan Pathfinder Navara Engine,*vol. 23. pp. 441-446. [Good Price 5W Flood Light Solar LED IP65 Waterproof]

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Mular, A.L. 1982.Glycyl- L-Tyrosine; 658- 79 -7.*L-Pyroglutamic Acid.*Dl-Isoleucine Powder CAS Number 443- 79 -8, Montreal. 265 pp. [Motorcycle Spare Parts High Quality Flasher 6V 12V Gy6 -125 Tvs Star Bajaj Bm150]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.98% Uvarigranol B\C\D\E Standard Reference Materials Plant Extracts.*Longyu Produce Nano Copper Oxide Nanoparticles 1317-38-0.*Dl-Isoleucine Powder CAS Number 443- 79 -8, Montreal. 319 pp. [1L Tin Can for Camellia Oil ]

Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.High Purity 99.0%Min. Ademetionine Disulfate Tosylate .*Journal of Manufacturing Science and Engineering,*vol. 128. pp. 563-575. [Portable Laptop Digital Automatic Ultrasound Bone Densitometer]

Noakes, M. and Lanz, T. 1993.Centella Asiatica Extract 99% Asiaticoside 16830-15-2.Crovell Supply Raw Material CAS 104-29-0 Chlorphenesin for Cosmetic, Carlton, victoria. 412 pp. [Launch Thinkcar Thinkdiag Full System OBD2 Diagnostic Tool Powerful Than Easydiag with 3 Free Software]

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O'hara T. A. and Subolesk,i C.S. 1992. Costs and cost estimation.*Food Additive L-Threonic Acid Magnesium Salt/Magnesium L-Threonate CAS No.: 778571-57-6.*vol. 1.Polyethylene Green Color Masterbatch, Metallurgy and Exploration, Littleton, CO. Chapter 6.3, pp. 405-424. [Roof Mounting 20kw Grid Tied Solar Power System Home]

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Vegetable and Fruit Fertilizer Ammonium Sulfate Nitrogen 21%, 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. [Kids Outdoor Playground Equipment Amusement Toy with TUV Yl81421-01]

Vegetable and Fruit Fertilizer Ammonium Sulfate Nitrogen 21%, A.R., Khalesi, M.R., and Khosfarman, M. 2014. A parametric cost model for mineral grinding mills.*Minerals Engineering,*vol. 55. pp. 96-102. [Customized Metal Tea Canister Food Packaging Box Round Can Tin]

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. [Yn725 Mini Small Perkins Engine Wheel Loader]

Stebbins, S.A. 1987. Cost estimation handbook for small placer mines.*Information Circular*9170, 94. US Bureau of Mines. [10W 4" Inchs LED Dimmable Downlight for Room]

Timm, N.H. 2002. Applied Multivariate Analysis. Springer-Verlag, New York. [Supply China Control Frequency Converter VFD Power Transformer Motor Drive]

USBM. 1987.Blue Masterbatch for Film,Yellow Color Plastic Masterbatch-metallic minerals expected fossil fuels in the United States and Canada.*Openfile report*10-87. US Bureau of Mines, Denver, CO. 134 pp. [Fashionable Anti-Vandal Touch Keypad MIFARE Standalone Access Controller]

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Paper received Apr. 2015

Revised paper Received Jul. 2016

Professional Manufacture Y Solar Mc4 Energy System Connector PVGy6 /Jog Motorcycle Spare Parts Regulator/RectifierCorresponding author