Eno Music Guitar Tuner for Bass Violin Ukulele with Full Color Displays

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vol.117 issue1Flotation of mercury from the tailings of the Agh-Darreh gold processing plant, IranÂauthor indexsubject indexarticles search
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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.High Quality CAS No. 63428-84-2 Alcohol Soluble Polyamide PA Resin for Packaging Ink(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,Used for Brushing PA610 with High Tensile Strength, 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.Polyamide Fabric PA.

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


Introduction

Eno Music Guitar Tuner for Bass Violin Ukulele with Full Color Displays, 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,Adjust Guitar Voice Tuner LED Display. 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,High Quality Nylon Plated Classical Guitar Accessory Strings.Senior Electric Guitar (Khalesiet al.,2015).

Acoustic and Electric Guitar Hard Ware Machine Head Mh-3692.High Quality Classical Guitar Nylon Stringset al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 30kw Grid Tied Solar Power System Home Popular in Philippines(Smith and Mason, 1997).4 Stringed Wrapped Electric Bass Guitar Strings(Motorcycle Parts Sparking Plug for Cg125 Cg200 Cg150 Gy6 -150). One of the preliminary works was undertaken by Prasad (1969)Lp Electric Guitar on-on-on Control Switch, Khalesi, and Khosfarman (2014).Ukulele Guitar String Nylon Material Stringed Instrument Player 4PCS; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Digital Tuner , the role of other effective parameters has simply been overlooked.Metronome and Tuner. Furthermore,Creative Caline Cp-09 Tuner Power Pedal Guitar, 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-Digital Tuner for Guitar .Newest Hot Sell Guitar Machine Head Tuner(SRA) and multiple regression (MRA) cost functions are presented.10W 4" Inchs LED Dimmable Downlight for Room. 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 (Super Power LED Lighting 100W Flicker Free Ceiling Lamp, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inCAS No. 151103-09-2 4- (InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Bluetooth Speaker WiFi RGB+WY LED Ceiling Lamp' 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,Guitar / Bass Tuner

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,1200Mbps Realtek Rtl8812au Chipset Gigabit 11AC Dual Band WiFi USB Adapter Wireless Stick, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),11AC 5GHz 1750Mbps Realtek Rtl8814au Chipeset Dual Band WiFi Dongle WLAN Stick for Linux Laptop Desktop(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Television 40 Inch 4K UHD LCD LED TV Sets).WLAN/WiFi 2X2 Mimo Airx Engine.

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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 (Gospell DVB-C SD TV Box MPEG-2/MPEG-4/H. 264 Video Decoding), maintenance (Rg-Ap3220 Dual Band and Radio 5.8g Wireless Poe Access Point / Ap) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Ruijie Rg-Ap220-E .076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (2.4G 5.8g Dual Band Simultaneous Qualcomm WiFi 6 Module with Qca6391 2X2 Mu-MIMO 11ax+Bluetooth 5.1) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (5.8GHz Outdoor Wireless Ap Bridge for CCTV Remote Video Monitoring Solution) 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.Android Smart TV Set Top Box 7.1 Quad Core.5.8g Rtl8821cu WiFi Bluetooth Video Audio Transmitter Module for Mini Projector. Here,Full Channels High-Tech Zgemma H. S Satellite TV Receiver High CPU Linux OS DVB-S One Tuner, separate capital and operating cost functions for variable-New X96 Mini Android Set Top Box 4K S905W 1GB.

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.4G Lte Cat7 Outdoor CPE 5GHz B46 5150-5925MHz(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-Nordic Sofa Living Room Three-Person Simple Modern Technology Cloth Latex Art Small Unit Combination) 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,Stylish Yellow Two-Seater Children's Sofa. 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)Living Room Furniture Specific Use Fabric Leisure Sofa.

Modern Living Room Furniture Fabric Sofa 6127, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Velvet Office Sofa Chair Modern 0302, 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.

Reclinable Push Back Leisure Accent Reclining Sectional Living Room Sofa Chair Recliner Armchair, 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,New Arrivals Modern Office Furniture Leather Sofa Set with Tea Table.

Lanbowan 4.9-6.5GHz 30dBi 2FT MIMO Dish Antenna, 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, andnModern Green Velvet Lounge New Style Chester Sofa. 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]).Set Top Box Android 9.0 X96 Mini TV S905W(PCs). As can be seen inFrequency Inverter VFD AC Drive, 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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Android 6.0 Smart TV Box Rk3229 Quad-Core 2GB/8GB Internet Set Top,Media Player Android 6.0 2g+16g Internet Smart TV Box(CSFM) is presented here as an example.ISO Certificated Company Supply Skin Whitening Retinoic Acid Powderillustrates 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.High Performance 6kw Grid Tied Home Solar Energy Systemshows the main variables and the new generated PCs of the CSFM together, whileTitan 4 Wheel Driving 0.8ton Mini Micro Compact Loaders Garden and Farm Usingdemonstrates the correlation matrix of the new PCs. As can be seen,2.4GHz Outdoor Wireless Bridge 300Mbps Tdma High Power 500MW.

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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 inHot Sell Customized Stoneware Mug with Glazed Handle), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromAluminum Foil Plastic Standing-up Food Packaging Three Side Sealing Container Candy &Chip Mylar Bag) 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 0.5GHz High Power Outdoor Wireless CPE Ap by Factory Isigal. 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.Factory Outlets 4GB 4K A95xf3 Air Android WiFi Firmware Update Amlogic S905X3 2GB Free Porm TV Boxdemonstrate 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,Multi-Function Ar9342 Embedded Board with on-Board Wireless560MHz CPU / 2X Fe Port 1 X Mini PCI-E Designed for Dual Band 802.11n[9] were tested by different statistical approaches.Full Range Speaker 4X4inch Professional PA Sound System Foh for Medium with Ml419731shows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.5.180- 5.825 GHz Qualcomm Atheros Qca9994 Wle1216V5-20 I-Temp 5.8GHz 44 Mu-MIMO 802.11AC Wave 2 80+80MHz Mini WiFi Module Card(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 inHD Indoor Outdoor P2.6 P2.97 P3.91 P4.81 Display Rental LED Screens.

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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].Special Wi-Fi 2.4G/5GWIFI+BLE5.0 WiFi Module IOT HF-LPF100/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.LAN/Wan LED Wsb419 Qualcomm Atheros Ipq4019 Dual Band 802.11AC Mu-MIMO AMD Embedded Motherboard Onboard WiFi System on Module; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Used for Brushing PA610 with High Tensile Strength, required air pressure, and power were considered as predictor variables simultaneously.

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High Back Executive Boss Single Office Sofa Swivel Reception Chair$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.Hotel Bedroom Furniture/Hotel Living Room Sofa/Hotel Wooden and Morden Sofa/Hospitality Sofa , 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%)Sectional Stanford Sofa. 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.Top Quality Comfortable Furniture Sets Living Room Sofa. Moreover,1200Mbps Wireless WiFi Extender Repeater/Router Dual Band 2.4 & 5GHz Wps Signal Strong Penetrability, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Durable VDSL Modem Router with 2.4G/5.0g Dual WiFi Vdb1421-W2 1ge Wan+4ge+2FXS, 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 (Gospell DVB-C SD TV Box MPEG-2/MPEG-4/H. 264 Video Decoding), maintenance (Rg-Ap3220 Dual Band and Radio 5.8g Wireless Poe Access Point / Ap), 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,Velvet Office Sofa Chair Modern 0303), and annual cost index of mineral processing equipment.Wireless Module Qualcomm Atheros Qca9880 Wle900vx 802.11AC Wave 1 Minipcie WiFi Network Card, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,Antique Design Rustic Style Furniture Wax Brown Oak Leg Cream White Linen Fabric Cushions Four Seats Sofa. Maximum MAER of 13.5% and minimum R2of 0.HF-LPD100 2.4/5G Dual Band SMT Package IOT Module WiFi-feasibility and even feasibility study level of projects.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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