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Online since: November 2013
Authors: Tomas Trčka, Pavel Koktavý, Robert Macků, Vladimir Holcman
Obtained results for the individual samples group are depicted in Fig. 1a as a solid line and fits experimental data very well.
It corresponds to the extracted data form the noise measurement as presented before.
Experimental data (see Fig. 2a) pointed out 1/f noise development with the bias current according to the Eq. 1 as is expected.
Instead of this, we observe invariant behavior with the marginal reduction of the measurement uncertainty.
Nevertheless, the experimental data must be corrected because of the high samples resistance, self-capacitance and the finite amplifier input resistance.
Online since: June 2013
Authors: Xiao Hong Ma, Jian Lv, Shu Ai Zhen, Ying Zhang
Through testing an actual project which uses solar energy-water source heat pump hot water system, analysis of the operation of the system, combined with the measured data, studied respectively of the factors of solar heating system and water source heat pump heating system.
Analysis the differences of collection time and power consumption under different temperature rise Test and analysis, select the temperature rise of 10 ℃ for a period, divided into four stages, respectively is 40 ℃ ~ 50 ℃, 50 ℃ ~ 60 ℃, 60 ℃ ~ 70 ℃, 70 ℃ ~ 80 ℃, screening the test data ,research under different temperature rise condition, the differences of pump running time and power consumption.
According to the engineering test data, filter out a few days that the irradiation is similar, compare system in different drain water temperatures, the change trend of daily heating efficiency and daily useful heat capacity, refer to Fig.5, Fig.6.
Pump with frequency adjustment, quantity of water intake is reduced with the reduction of the load, so the pump power consumption reduced. 2.2.
Summary By testing the operation of solar energy-water source heat pump hot water system in a practical engineering, combined with test data to analyze and research, given some suggestions for engineering optimization.
Online since: September 2013
Authors: Jie Yuan, Yang Liu, Xu Tang
It takes the structure of the impulse response data (later promotion can use free attenuation data or free response data) as input and adopts the method of singular value decomposition to meet minimum features of the input system.
However, as the noise interference and the measuring error exist, is generated by the test data.
An eigensystem realization algorithm for modal parameter identification and model reduction.
Online since: January 2013
Authors: Ronald Green, Daniel B. Habersat, Aivars J. Lelis, Mooro El
From the data we can then extract the maximum charge pumping current Icp and estimate VT and VFB respectively by the position of the rising and falling edges of the signal [13].
A typical data curve is shown in Fig. 2.
From the data, we extract the number of charge pumping states Ncp by , (1) where q is the elementary charge, f is the frequency of the applied gate pulses, and AG is the MOSFET gate area.
Ncp was consistently steady during each 25 °C segment and only increased during BTS segments, whether positive or negative; relaxation through reduction in Ncp was not observed, in contrast to the ID  VGS results in Fig. 1.
This data is summarized in Table 1.
Online since: July 2014
Authors: M. Santhosh, K.P. Padmanaban
To measure and evaluate the process parameters during the conduct of experiments, the engine instrumentations are coupled with the data acquisition system.
Fig.1 Variable Compression Ratio engine setup with data acquisition system The experiments are conducted at different CRs i.e. 18, 19, 20, 21 and 22 at part load conditions and the initial tests were carried out with standard diesel for different CRs to obtain the engine with the diesel as a reference data.
The reason for reduction in EGT is that lesser heating value of COME and temperature during compression [12].
To determine the performance of the COME, the experimental investigations are carried out for that an engine experimental setup has been developed with the eddy current dynamometer and the setup is connected to the data acquisition system.
Online since: January 2015
Authors: Darya Nemova, Nikolay Vatin, Darya Sergeevna Tarasova
The initial data for calculating of transmission losses Figure 2.
The type of translucent structures The values of heat transmission resistance R, m2∙°С/W The one-chamber glass R1 0.51 The triple-pane glass R2 0.55 Five-chamber system structural glazing R3 2.22 The heat losses through the building envelope for the three types of translucent structures calculated: (1) The heat losses through the building envelope for one-chamber glass (Eq. 1) are equal: The heat losses through the building envelope for triple-pane glass (Eq. 1) are equal: The heat losses through the building envelope for five-chamber system structural glazing (Eq. 1) are equal: The received data is put in the table 4 and translate the unit of measurement kWh/year into the unit of measurement GCal/year.
Data for construction of a graph are presented in the table 6, 7.
Data for construction of a graph are presented in the table 8.
Jenergojeffektivnost' v stroitel'stve: voprosy normirovanija i mery po snizheniju jenergopotreblenija zdanij [The energy efficiency in the field of construction: questions of norms and standarts and solutions for the reduction of energy consumption at buildings] (2010) Magazine of Civil Engineering, 1 (11), рр. 9-13
Online since: June 2014
Authors: Hui Huang, Bo Qi
All the data were expressed as mean ± SD and differences between groups were assessed by analysis of variance (ANOVA) and Student’s t-test.
GPx is a selenoenzyme which catalyzes the reduction of hydroperoxides at the expense of reduced glutathione.
In the present study, the data showed that the SOD, GPx, and CAT contents in the liver and skeletal muscle of mice in the medium-dose and high-dose PGP supplementation group were significantly higher compared with that in the control group.
In the present study, the data showed that the MDA contents in the liver and skeletal muscle of mice in the all PGP supplementation group were significantly higher compared with that in the control group.
Data from the current study relates to mice, therefore future studies using different subjects, possibly of different sporting backgrounds, are required to extend these finding.
Online since: August 2013
Authors: Bo Feng, Guang Xiao Kou, Hui Wen Zhou, Liang Liang Hu, Wen Wu Tang
The massive heat produced in the process will raise the temperature of the chip , leading to the reduction of photon that chip has ejaculated, the lower efficiency of acquiring light, the red shift of the ejaculatory spectrum and the decreasing of the color temperature quality.
The test focuses on the surface temperatures of LED lamp shell, heat pipe and three substrates. 2.4 Analysis of the testing data When the led light is under working, the heat sink temperature goes higher from the environment temperature, but will stay the same when the temperature reaches a balance after a while.
Figs. 6-8 are the data figures of the lamp shell, loop heat pipes, and substrates.
In addition, a contrastive analysis of the imitated result and testing data has also been made and the results are as follows: (1) The looped pulsating heat-pipe has the characteristics of low thermal resistance and good equalizing performance.
(4) The imitative results are almost in line with the testing data.
Online since: March 2008
Authors: John G. Michopoulos, Tomonari Furukawa
Offline path planning is the loading path planning process to be conducted until data sufficient enough to identify material properties are obtained.
Therefore, only prior information is used and the quantification of experiments is achieved by pseudo-experimental data derived via simulation (FEA).
Online path planning, on the other hand, updates loading path by taking sensor data or empirical information into account in addition to the prior information.
In order to investigate the effect of numerical issues first, the testing machine and the experimental data are created in a virtual environment.
Reifsnider, StiRness-reduction Mechanisms in Composite Laminates, SPT775 Damage in Composite Materials (1982), pp. 103-117
Online since: September 2007
Authors: Silvio Abrate, Alberto Vallan, Guido Perrone, Massimo Olivero
Introduction Fibers optic sensors (FOS) are gaining an important role in structural monitoring thanks to their immunity to electrostatic discharges, fire safety compliance and capability to use the same fiber both for sensing and data transmission.
The control unit includes a 12-bit data acquisition (DAQ) card with a USB interface for connection to a PC that performs the elaboration of data and keeps historic record of displacements through a LabVIEW program.
Upon real-time application of the linear temperature compensation (dark grey triangles) to the raw data, the residual variations are lower than ±45µm (black squares).
To reduce such effect we introduced the packaging described in the previous section and we are still testing the new assembly repeatability, though the preliminary results suggest a two-fold reduction of the normalized signal scattering. 0 2 4 6 8 10 12 14 16 18 20 0.0 0.4 0.8 1.2 1.6 2.0 normalized signal sensor ±standard deviation band Fig. 5.
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