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Online since: October 2008
Authors: J.H. Shen, Jian Guo Yang
The new method is applied on thermal error modeling for a CNC turning center and two groups of new measured data are used for model validation.
The PLSNN has good fitting capability for the modeling data.
For this reason, another two groups of new data were also measured in this experiment for the model validation.
For testing data 1, the maximal prediction residual is 4.17 μm, and the average of residuals in absolute value is 1.96 μm; for testing data 2, the maximal prediction residual is 4.09 μm, and the average of residuals in absolute value is 1.90 μm.
Model performance of PLSR, D-MRA, V-MRA, D-NN, V-NN and PLSNN is compared based on the modeling and testing data.
Online since: May 2013
Authors: Lorenzo Pagliano, Paolo Zangheri, Salvatore Carlucci
In this paper we report, in particular, a selection of the result of the monitoring and simulation phases regarding the contribution (in terms of reduction of the indoor operative temperatures) of Earth-to-Air Heat Exchangers and natural ventilation strategies to meet different summer thermal comfort targets and consequently to avoid the installation of an active cooling system or minimize its use and energy demand.
Long term measurement of air temperature and relative humidity was carried out using stand-alone sensors-data loggers.
The instantaneous rates of airflow inside the distribution plant were obtained from the data of energy consumption of fans and were verified with measurements of air velocity inside the EAHE (made with a propeller anemometer with an accuracy of 0.2 m/s).
In order to deepen the understanding of building behavior and to develop a parametric analysis, especially focused on the system EAHE-building and on the implementation of effective natural ventilation strategies during the warmer period, we also used the collected data to calibrate a building model developed in the EnergyPlus environment.
Indoor operative temperatures plotted against outdoor running mean temperatures for the Case Study (measured data) and other building variants (simulated data); the lines refer to comfort ranges of Category II (Fanger with presence of ceiling fans taken into account using ASHRAE air velocity correction: black lines; Adaptive: gray lines) proposed by the Standard EN 15251:2007 Conclusions In order to evaluate the possibilities to reach the Net Zero Energy goal, we analyzed the behavior of a single family Passivhaus, with a focus on its energy concept (Passivhaus with EAHE), climatic context (humid subtropical climate of the Po Valley) and internal loads (higher than usual in Passivhaus homes).
Online since: August 2013
Authors: Hang Chen, Ling Ling Shen, Shu Ming Ye
The noise is nearly random and significant reductions in the detection limit are possible by averaging multiple observations in this model.
The data storage motherboard is the analog to digital converter and transmits the data to the next board.
Fig.2 In-situ detection instrument of nitrate Data processing The photoelectric diode array of the spectrophotometer collect 256 data between 195nm and 391nm, but the wavelength and the data do not meet the linear relationship.
The light source has a shutter which can be closed to estimate dark current, but this leads to the useful concentration data lost during the period between detections.
The equation (Eq. 2)for this particular SG smoothing is defined: (2) We got the samples of 10mol/l nitrate and collected the curve[Fig.3.] of the data.The figure[Fig.4.] below shows the smoothing results for the spectral signal, using a second order polynomial fit with 102 data points.
Online since: August 2016
Authors: Arnab Sikidar, Teg Chand, Pritish Shubham
The most important advantage of RP is that it fabricates physical model layer by layer directly from CAD data.
For injection moulded sample, highest elongation of 5.8% was found before final breakup; whereas for FDM sample with layer thickness 0.50mm, least elongation of 3.7% was found which shows 34% reduction in net elongation.
This reduction in ultimate tensile strength and net percentage elongation at break can be directly attributed to the negative effect of layer thickness.
Lowest impact strength is for 3D printed sample of magnitude 47.1 J/m with layer thickness 0.5mm which signifies that there is reduction of 54.5% in toughness when compared with injection moulded samples.
Advanced Manufacturing Technology. 53 (2011) 275-283 [13] Information on http://teststandard.com/data_sheets.html [14] S.
Online since: March 2022
Authors: Marrisaeka Mawarni, Wayan Firdaus Mahmudy, Fitri Utaminingrum
The amount of data we used is 1908 mammograms.
The data data consists of 477 data testing and 1431 data training.
The Chi-Square formula is given in eq (8) [32]: X2t,c= N(A×D-BC)2(A+B)×(C+D)×(A×C)×(B+D) (8) Variable t is the term searched for in class c, is the amount of training data, is the amount of data in class which contains the term t, is the amount of data not found in class but contains the term t, is the amount of data found in class but does not contain the term t, and is the amount of data that is not class data and does not contain the term t.
Data Sci., 2020, doi: 10.47738/jads.v1i1.7
Data Sci., 2020, doi: 10.18517/ijods.1.1.42-50.2020
Online since: October 2014
Authors: Ubaidillah Ubaidillah, Imam Ali, Wibawa Endra Juwana, Eko Prasetya Budiana, Suyitno Suyitno
The thermometer connected to the data acquisition via bridge amplifier to ensure the precise measurement of temperature.
Measurement computing MCC DAQ USB-1208LS is used as data logger in which this data logger is low-cost with reasonable technical specification for the application proposed in this paper.
The data are stored and displayed in personal computer via TracerDAQ software.
The USB interface is preferable since its fast data transfer with resolution of 12 bits and sampling rate of 1.2 kS/s.
From the data, several relationships could be figured out and analyzed.
Online since: November 2012
Authors: Jian Zhong Zhou, Jie Hua Ding, Yong Chuan Zhang, Xiao Ling Yang
The entropy value theory is based on sample data which is more closeness to fact than other methods.
Normalization of data sources.
In order to facilitate the calculation, the data need to be normalized.
The sample data is from natural disaster database of China.
Flood Damage Data of 22 Areas in China in 1998 NO.
Online since: September 2014
Authors: Xiang Zhi Lu, Hong Jun Dai, Lei Ju
In this paper, we involve Reliability Station (RS) into modern superscalar out-of-order data path.
Figure1 The extension of RS based Microarchitecture Data dependency can also pull down the ILP.
But it is impossible under traditional data propagating approach because of lacking inputs.
RP, which inherits from DIE-IRB, is aimed to alleviate the ILP loss resulting from data dependency, and functions as IR at the same time.
In our scheme, as the data can be used unless having been verified, the re-execution only happens to the corresponding instruction.
Online since: July 2013
Authors: Ying Yun Dai, Long Hu Wang, Jun Li, Hui Chen
At the same time, four buttons were used to control the status of the motor, and an AMPIRE-12864 was used to display the real-time data of speed of stepping motor measured by the photoelectric encoder.
At present, motorcycle road test instrument always equipped with liquid crystal display (LCD) that can display Chinese characters and show the real-time test data, with the standard RS232 interface, the device can send test data to other computer, and external micro printer can be attached to as well.
This module is connected with SCM P4.1[4]. 5) LCD display module uses the AMPIRE12864 to dynamically show the actual rotation speed, and I/O port is used to provide read, write, read-write selection, data instruction selection, left-or-right screen selection signal and data bus port for AMPIRE12864.
The experiment data is shown in Table 1.
Table 1 Experimental data setting speed v (km/h) speed by the road test instrument V (km/h) speed by the calibrating apparatus V′ (km/h) absolute error / ′ (km/h) relative error / ′ 10 9.9 9.99 0.1 / 0.01 1.00% / 1.00% 20 19.7 19.88 0.3 / 0.12 1.50% / 0.60% 30 29.5 29.78 0.5 / 0.22 1.67% / 0.73% 40 39.3 39.69 0.7 / 0.31 1.75% / 0.78% 50 49.1 49.57 0.9 / 0.43 1.80% / 0.86% 60 58.9 59.46 1.1 / 0.54 1.83% / 0.90% Experimental data analysis shows that the accuracy of the road test instrument reaches the standard.
Online since: August 2013
Authors: Zun Qun Xiao, Cai Yun Xu, Guo Dong Wu
But the gel time does not increase evenly with reduction calcium carbonic reducing.
All the statistics data of abrupt increased point of gel time are showed in table 1.
Table1 The statistical data of abrupt increased point of gel time Group number 1 2 3 4 5 6 7 8 9 Sulfuric acid(ml) 22 21 20.5 20 19.5 19 18 17 16 Calcium Carbonate (g) 1.1 1.0 0.9 0.8 0.7 0.7 0.65 0.5 0.4 pH value 3.6 3.4 3.4 3.5 3.0 3.6 3.2 3.6 3.0 1.2 Gel strength of pure slurry The prepared slurry is pour into the specimen and stirred continuously.
Due to the reduction of the concentration of H+, such that the reaction (1), (2), (3) equilibrium are moving to the direction of the generated H+, the concentration of ,andare increased in the solution.
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