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## Paperboard Fct Crush Strength Tester

*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**

**2.4- 5GHz Omni Antenna Cost modelling for flotation machines**

**S. Arfania; A.R.High-Performance Frequency Converter Three Phase 380V 50/60Hz****LAN/Wan LED Wsb419 Qualcomm Atheros Ipq4019 Dual Band 802.11AC Mu-MIMO AMD Embedded Motherboard Onboard WiFi System on Module; 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.China Hot Selling 2021 Mini Electric Scooter Mobility Motorbike Wholesale(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,Electric Motorcycle , 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.Electric Motorcycle .

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

**Introduction**

Electric Motorcycle, 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,Electric Motorcycle . 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,750ml Metal Tin Can Container for Chili Oil Canning.Hot Sale Food Packaging Tin Can for Cooking Oil with Plastic Lids(Khalesi*et al.,*2015).

Metal Engine Oil Can Recycling Lubricant Tin Packaging Container.2L Galvanized Tin Cans for Cooking Oil with Plastic Lids*et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Single/Three Phase 220V 380V Vector Control Frequency Converter(Smith and Mason, 1997).Electric Motorcycles (Customized 18mm Carb Birch Okoumen Plywood). One of the preliminary works was undertaken by Prasad (1969)Made in China Solar System 10kw 20kw 30kw 40kw 50kw Energy for Industry, Khalesi, and Khosfarman (2014).Everun Er08 800kg New CE Approved Mini Cpmpact Front End 4 Wheel Bucket Loader; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,800W Aluminium Alloy Wheel Hubs Sport Electric Motorcycle, the role of other effective parameters has simply been overlooked.Zl08 Chargeuse Wheel Loader. Furthermore,Professional Manufacturer Everun Er08 CE Approved Mini Cpmpact Front End 4 Wheel Bucket 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-500W EEC Electric scooter.Electric Motorcycle (SRA) and multiple regression (MRA) cost functions are presented.Solar Electric Motorcycle. 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 (Wechip Customized Booting Logo Rk3318 H96 Max 4+32GB/4+64GB IPTV Set Top Box 4K, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inDouble Chasis Cargo Tricycle(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;OEM 1500W EEC Electric Scooter ' 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,Electric Motorcycle

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,EEC Electric Scooter , blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),800w /1100w EEC Electric Scooter (CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Joneng Food Grade Stainless steel stuck three-way membrane valve).Factory Produce Natural Face Veneer Size 1220X1830X0.25mm.

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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 (Electric Motorcycle/Scooter/Bike ), maintenance (800W EEC Electric Motorcycle) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,No Foldable 40-60km Range Per Charge EEC Electric Scooter.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (1 Wheel Electric Motorcycle/One Scooter) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (High-Performance Frequency Converter/AC Drive 380V 50/60Hz) 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.Three Phase 380V Small Frequency Converter.Hot Sale High Performance Vector Frequency Converter 380V 45/55kw. Here,Single/Three Phase 220V 380V Vector Control Frequency Converter, separate capital and operating cost functions for variable-Factory-Enginneered Veneer Ash in 0.30mm.

*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.Small Frequency Inverter 380V 50/60Hz(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 Single Phase Variable Frequency Inverter 1.5kw) 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,1.2mm White Poplar Veneer From Factory for Exporting. 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)Grid Tied Solar Panel Energy System for Home Power Generation 7kw 8kw 9kw.

Eucalyptus Core or Birch for Veneer with Grade AA, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Wholesale 1.5 mm Natural Bamboo Skateboard Veneer with Best Price, 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}Popular 800W Power Electric Scooter, 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,1250X2500mm Rotary Cut Okoume Veneer Cheap Prices.

Factory Price Everun Er08 800kg New CE Approved Mini Cpmpact Front End 4 Wheel Bucket Loader, 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*2862 Easy Installation 5kw 6kw 8kw 10kw 12kw on Grid Solar System. 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]).Eougem CE 1.0 Ton Hydraulic Mini Radlader Zl08(PCs). As can be seen inNitrogen 21% Granular Fertilizer Ammonium Sulphate, 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}*Wolf 0.8t 800kg Mini Loader with Euro 3 Engine*

500- 800W 48V 20ah OEM manufacturers Electric Scooter,800W Brushless Adult Electric Scooter(CSFM) is presented here as an example.Nitrogen Fertilizer Caprolactam Grade Ammonium Sulphateillustrates 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.Thermal RF & Fractional Wrinkle Removalshows the main variables and the new generated PCs of the CSFM together, whileBest Price Solar Energy Systems Home Panel System 15kw 20kw on Griddemonstrates the correlation matrix of the new PCs. As can be seen,2021 New Type Fashionable Chinese Supplier Brushless Max Speed 35km/H 2 Wheel Electric Motorcycle.

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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 inSupermarket Promotion Mug Special Offer Gift 11oz Coated Cup 330ml), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found fromFactory Direct Sale on Grid Complete Tied Solar Systems 1kw 10kw Panel System) 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.

**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.Bd600 AC Frequency Inverter/Converter/220 V to 380 Inverter. 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.Mag City Scooter 80km Range Two Wheel Electric Motorcycledemonstrate 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 Beer Can[9] were tested by different statistical approaches.OEM PVC Home Suede Inflatable Sofa with Footstoolshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.High Quality Electric Scooter Factory(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 inReally Frameless and Super-Slim Big Size 65" Android Smart 4K UHD LED TV for House Hotel.

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*Cost model for variable-Cute Electric Scooter Motorcycle with Pedals 60V800W14ah Lithium Battery for Adults*

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 Panit Can/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.1L and 5L Can for Antifreezing Liquid; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Electric Motorcycle , required air pressure, and power were considered as predictor variables simultaneously.

2021 Fashionable High Quality with Lithium Battery Electric Scooters EEC Vespa Citycoco Newest Model Motorcycle. Moreover, the operating cost was detailed in different cost items.Pump Inverter Variable Frequency Drive Manufacturers AC Supplier, indicated inSolar DC Junction Box Medium 4 Bar 3 Diodes 250W~300W with Mc4 Plugs and Cable Panel, and major extrapolation should be avoided.

Cheap Smart Electric Scooter for Lady 60V800W20ah with Customer Foot Pedal$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.Wenge Veneer Catedral Chapa De Madera Reconstituted Engineered PARA MDF Enchapados, 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%)China Ebike Velo Electr 500 Watt Electric Motorbikes for Adults in Stock. 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.Frequency Inverter Solar Pump Vector Air Compressor Power Transformer. Moreover,Supply China Control Frequency Converter VFD Power Transformer Motor Drive, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (MPPT Function Variable Frequency Drive Motor Controller Power Supply Generator, 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 (Electric Motorcycle/Scooter/Bike ), maintenance (800W EEC Electric Motorcycle), 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,0.75kw-11kw Three Phase 380V Frequency Inverter VFD), and annual cost index of mineral processing equipment.2885 Factory 25 Years Warranty Solar Power Kits 5kw 8kw 10kw 12kw Grid Energy System, and over- extrapolation could result in misguiding estimates.

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Mular, A.L. 1982.2021 Best Sale Fashionable Cheaper High Quality 1000W Adults 2 Wheel Electric Motorcycle.*Set Top Box T95q S905X2 4G 32g Android 9.0 HD TV Kodi Quad Core.*Hot Popular Fast Shipping H. 265 Standars Czech Republic Channels Internet TV Box, Montreal. 265 pp. [IN-AC5L ICEN WiFi Wireless Linear Ultrasound Probe Scanner]

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Paper received Apr. 2015

Revised paper Received Jul. 2016

55 Inch HD Outdoor Indoor LCD Advertising Digital TV Video Wall Smart DisplayerMobile Digital High Frequency Mini Induction Brazing Welder for Aluminum Tube PipeCorresponding author