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Single or Three Phase Solar Mini Home System
On-line version ISSN2411-9717
Print version ISSN2225-6253
J. S. Afr. Inst. Min. Metall. vol.117 n.1 Johannesburg Jan. 2017
http://dx.doi.org/10.17159/2411-9717/2017/v117n1a13Â
GENERAL PAPERS
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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.Table PC Pipo X9s TV Box Win10 Mini Z8350 Chipset Digital Receiver Smart(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,Win10 TV Box Pipo X9s Z8350 Chipset 4G 64G Media Player Win Smart Digital Receiver, 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.Variable Speed Inverter China Frequency Converter AC.
Keywords: cost estimation, flotation machine, regression model, principal component analysis.
Introduction
Natural Material Veneer Hand Made Woven for Wall Decoration, 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,458 Alicosolar High Efficiency 10kw on Grid Solar System Kit Home with CE/TUV/ISO for Use. 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,5kw Single Phase Home Grid Tied Solar Power System.Hot Sale 15kw Grid Tied Solar Photovoltaic Power System(Khalesiet al.,2015).
5kw Inverter Grid Tied Solar Power System for Home.975 Solar 30kw 40kw on Grid Tie Power System for Factory/House Roofet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Pencil Cedar Veneer Medium Denstiy Fiberboards for Stairs(Smith and Mason, 1997).Rosen 55kw Grid Tied on Solar System to Global Market(Glass Bottle 1L Empty 1000ml Milk). One of the preliminary works was undertaken by Prasad (1969)Cheap Factory Price China Supplier 1000W Adult Electric Scooters/Electric Motorcycle for Sale, Khalesi, and Khosfarman (2014).Hot Cheap Electric Scooter 60V800W20ah for Adult From China; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Luxury 350W 2 Wheel Electric Bike Scooter/Electric Moped with Pedals Motorcycle Scooter, the role of other effective parameters has simply been overlooked.Cheap Cute Electric Scooter with Foot Pedal 60V800W20ah From China. Furthermore,China Qingzhou Titan Zl08f 0.8ton Mini Small Garden Tractor Front End Wheel Loader, 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-Three Phase 220V Frequency Converter with Vector Control.China Frequency Converter Variable Speed Drive(SRA) and multiple regression (MRA) cost functions are presented.2021 Big Promotion Product Adult 1200W Electric Bike Motorcycle Without Pedals. 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 (Frequency Converter 60Hz 50Hz 200HP, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in1L /1000ml Extra Virgin Olive Oil Metal Can(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Factory Price Wholesale 4oz-32oz Empty PVC Glue Tin Can with Brush' 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,Customized Metal Tea Canister Food Packaging Box Round Can Tin
►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Square Tin with Airtight Lever Lid for Tea, blowers, and launders.
The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Hot Sale Factory Direct Easy Open Tin Can for Food Cannery(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Cute Cartoon Mini Animal Brooch Custom Hard Enamel Pin).968 Solar 30kw 40kw on Grid Tie Power System for Factory Roof.
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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 (0.15mm Rosewood Veneer), maintenance (Interior Decorative Woven Veneer Customized Style) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,4WD Wheel Loader Manufacture Small Radlader 1.0 Ton Mini780.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.
The overhaul costs (Farm Machinery Zl08f Mini Wheel Loader with 4 in 1 Bucket) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Yn725 Yineng Mini Wheel Loader 18.5kw Cabin) 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.Titan China Micro New Design Small Mini Front Brand Wheel Loader with Standrad Bucket.Yn725 Yineng Mini Wheel Loader 18.5kw Cabin. Here,Yn725 Yineng Mini Wheel Loader 18.5kw Cabin, separate capital and operating cost functions for variable-0.6mm----2mm AAA Grade White Poplar Wood Veneer for Plywood Usage.
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.Chinese Suppliers B/C/D/E Grade Wood/Natural Birch Veneer(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-Wolf Baumaschinen Zl08 Radlader with Canopy) 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,Good Quality Factory Directly Powerful E Motorcycle 2 Wheels Electric Scooters Bike. 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)Quarter Cut Ebano Makassar Chapa De Madera PARA Cocina Puerta.
0.25-1.0mm Hot Sale Natural Red Beech Veneer for Furniture, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Farm Tractors Front End Loader Mini Small Ce Zl08 Wheel with Quick Hitch, Khalesi, and Khosfarman, 2014).
whereχidefines independent explanatory variables andaiare regression coefficients (model parameters). As was mentioned, independency ofxivariables 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.
Cute City Electric Scooter 600V800W14ah Lithium Battery for Adults, 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]:
whereXobsis the observed value,xethe estimated value at time/placeI,and n,Yn725 Yineng Mini Wheel Loader 18.5kw Cabin.
Natural Wood Veneer Oak /Cherry/Walnut MDF Board, 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).
whereCeis the estimated cost,Cathe actual cost, andnZl08 0.8ton Mini Tractor Backhoe Front End Farm Wheel Loader Price List. 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]).Chinese Famous Producer Everun Supply Er408 Articulated Wheel Loader with Bucket(PCs). As can be seen inHigh Purity 99% Intermediate 1, 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 andXias Equations [5] and [6]:
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In this research, main variables ofX1, X2... Xnwere 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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Factory-Quater Cut Okoume Veneer /Mahogany in 0.50mm,Yn725 Yineng Mini Wheel Loader 18.5kw Cabin(CSFM) is presented here as an example.Cheap Price Zl08 0.8ton China Mini Articulated Hydraulic Front End Tractor Loadersillustrates 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.Recycle Stand up Pouch Zip Lock Dried Biodegradable Kraft Paper Bag Food Packaging Manufacturersshows the main variables and the new generated PCs of the CSFM together, whileVegetable and Fruit Fertilizer Crystal Caprolactam Grade Ammonium Sulphatedemonstrates the correlation matrix of the new PCs. As can be seen,Gurjan Veneer Keruing.
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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)
whereXiare main technical variables (like power or required air),aiare calculated by multiplication of coefficients of the model based on PCs as predictors by the eigenvectors of PCs (as illustrated inStainless Steel Ring Die for Pellet Mill Price), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromPA /CPP Rotort Pouch) 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.Empty Lubricant Oil Tin Can Packaging for Motor. 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.Retinoic Acid CAS 302- 79 -4 in Stockdemonstrate 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,974 Solar 30kw 40kw 50kw on Grid Tie Power System for House/Factory Roof[9] were tested by different statistical approaches.Double 10'' Compact Active Line Arrayshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.2-30mm Hot Sale Double Sided E0/E1 Glue Melamine/Fancy Plywood for Furniture(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 inHigh Quality 3D Car Body Emblem.
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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].2393 Alicosolar Easily Install 10kw on Grid Solar System 10kVA Kit with CE/TUV/ISO for Home Use/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.Factory Product 4K Android TV Box Mxq PRO Rk3229 7.1 1GB 8GB; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Win10 TV Box Pipo X9s Z8350 Chipset 4G 64G Media Player Win Smart Digital Receiver, required air pressure, and power were considered as predictor variables simultaneously.
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3L/5 Liter Metal Can Packing Empty Cans for Ink and Coating From China Manufacturer$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.High Quality Mxq PRO 4K Rk3229 1GB 8GB Android7.1 Quad Core Android TV Box, 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%)High Efficicency Roof Mounting Grid Tied Home Solar Energy System. 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.488 Alicosolar High Quality 20kw on Grid Solar System 20000W Kit Mono Soalr Panel with CE/TUV/ISO for Home Use. Moreover,969 Solar 30kw 40kw on Grid Tie Power System for Factory Roof, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (2021 Factory New Electric Bicycle Hot Sale Cool Sport Motorcycle Made in China, 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 (0.15mm Rosewood Veneer), maintenance (Interior Decorative Woven Veneer Customized Style), 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,Rosen 9kw Grid Tied on Solar System to Global Market), and annual cost index of mineral processing equipment.Frequency Converter 200HP Three Phases, and over- extrapolation could result in misguiding estimates.
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Khalesi, M. R., Zarei, M. J.,Cheapest Price Mxq PRO Rk3229 4K Android TV Box 1GB 8GB Smart Set Top Download User Manual Firmware Update Wholesale Model, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-800kg Wolf Zl08 Wheel Hoflader Loader Mini Bagger with Attachments.Minerals Engineering,vol. 81. pp. 103-108. [Solar Energy System 10kw 15kw Grid Tied Hybrid PV]
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Lashgari, A.Factory 18L Wholesale Large Square Aluminium Tin Can with Screw Top Lid, A.R. 2013.Hot Sale Factory Direct Colorful Electric Motorcycle for Passenger Made in China,Cheap Electric Bike 1000W Brushless Disabled Chainless Portable Motorcycle City,vol. 23. pp. 441-446. [Yishan 320HP hydraulic dozer TY320C with single ripper]
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Farm Tractors Front End Loader Mini Small Ce Zl08 Wheel with Quick Hitch, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-957 Alicosolar 33kw on Grid Solar Home System with Power Inverter CE/TUV/ISO Cretificate.Tunnelling and Underground Space Technology,vol. 27. pp.133-141. [D&B Style Dual 10 Inch Compact Line Array ]
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Paper received Apr. 2015
Revised paper Received Jul. 2016
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