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Online since: August 2013
Authors: Bo Feng, Hui Wen Zhou, Wen Wu Tang, Liang Liang Hu, Guang Xiao Kou
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: September 2013
Authors: Ling Liu
It is not used directly for the microcontroller but to be divided that the oscillation signal is generated by the oscillation circuit, the frequency can be various microcontroller associated clock signal, as shown in figure 2.Oscillation pulse is as the system clock signal by two divider, it generates ALE signal divided by three on the basis of the two divider, and get the machine cycle signal divided by six on the basis of two divider.The P0 port is used as the data sent to the D/A converter, the P0 port hasn’t pull-up supreme resistor internal, therefore connection with an external pull-up resistor RST1.
The system adopt to DAC0832 straight.They are grounded low-level access GND that the chip select signal CS, the data latch strobe input pin WR1,the data transfer control signal input pin XFER and DAC register strobe input pin WR2.The data latched allow eighth pin is reference voltage of Vref, the reference voltage is 2.5V if you adjust external sliding rheostat R15.Because of the chip DAC0832 being a form of current output, you have to add an op-amp that it convert the current to voltage directly.
The brightness of the lamp and 4.5V battery use time The 4.5v battery continuously supply for 86 hours.The similar products can only consecutively work for maximum 10 hours on the market, for there are always a significant reduction in electricity losses.
Online since: August 2015
Authors: Manop Aorpimai, Pornthep Navakitkanok
The monitoring of the remaining propellant after each OCM is important, and it can be evaluated from the gas pressure (P) and temperature (T) retrieved from the satellite’s telemetry data.
With each thruster’s calibrated data provided, the final pressure, hence final mass, can be found by iteratively integrating the above equation with decreasing at each step until the required delta-V is obtained.
The OCM verification and calibration are performed using the navigation data retrieved daily from the onboard GPS receiver.
Fig. 3 Altitude profile during the orbit transfer Fig. 4 Reduction of altitude toward re-entry Summary We have studied a satellite’s end-of-life de-orbiting.
The evaluation of the propulsion system near its end-of-life using the telemetry data will be less reliable.
Online since: July 2011
Authors: Tadeusz Niezgoda, Jerzy Malachowski, Pawel Baranowski
Table 1 presents the statistic data of the tire, whereas in Table 2 the other suspension system parts statistic data are presented.
Statistic data of discrete tire model Part No. of elements (HEX8) No. of nodes Material model Tread 3840 6360 Rubber Inner fabric 3600 7680 Rubber Carcass 1680 3600 Rubber Sidewall 4800 8160 Rubber Bead core 2400 3840 Rubber Part No. of beam elements Nodes Material Model Circumferential cords 4560 4561 Steel Radial cords 8639 8881 Steel Table. 2.
Statistic data of discrete suspension system model Part No. of elements (HEX8) No. of nodes Material model Tire 16320 25520 Rubber/Steel Rim 7192 12164 Steel Drum brake 4680 7440 Cast iron Axle 4278 5236 Steel Hub 2268 3132 Steel Axle bush 4585 6207 Steel Spring 4368 7077 Steel Longitudinal 7302 9052 Steel Fig. 3.
Moreover, the most positive aspect of the method is significant reduction of computational time.
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: Nikolay Vatin, Darya Nemova, 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: January 2012
Authors: Ke Qing Sun, Hui Yang
(The fire head releases in this paper are full scale values) The experiment has two models, which established on a reduced scale tunnel model (scale reduction 1:50) in this paper: one is 200 m long, 10 m wide and 5 m high, which was called S1; the other is 200 m long, 10 m wide and 10 m high, which was called S2.The fire source was located in the middle of the tunnel, two air vents are set away from the fire about 20 m, the size of exhaust vent is the square (3.5 m long, 1.5 m wide).
Table 1.The main data in the experiment [7] Heat release Fire size Smoke flow Helium rate [MW] [cm2] rate [l/min] ratio [%] 0.2 3.68 4.59 46 0.4 6.16 8.70 49.9 1 12.08 19.55 54.8 2 20.06 36.58 58.8 4 34.64 65.99 62.6 10 76.04 154.70 68.2 Fig. 2.
CFD method can be used to simulate the tunnel fires under a variety of complex conditions, which not only can reduce testing costs, but also can get some data that is difficult to measure in the experiment.
In addition, CFD simulation of tunnel fire can also provide reference data measurement, and it is easy to change the conditions in the experiment.
Table. 3 Comparison of simulate results with experimental results HRR [MW] S1 S2 Simulation [m/s] Experiment [m/s] Relative error [%] Simulation [m/s] Experiment [m/s] Relative error [%] 0.2 0.62 0.62 0% 0.64 0.60 6.33% 0.4 0.90 0.92 -2.14% 0.74 0.73 1.92% 1 1.22 0.97 20.76% 0.93 0.99 -6.06% 2 1.47 1.2 18.71% 1.33 1.25 6.56% 4 1.66 1.62 2.37% 1.70 1.71 -0.47% 10 2.51 2.24 10.50% 2.09 2.36 -11.53% By comparing the data in Table 3, it can be found that the numerical simulation and experimental results have some differences.
Online since: October 2016
Authors: Milan Mojžiš, Ľudovít Parilák, Peter Bella, Pavol Buček, Martin Ridzon
Key input parameters were identical for all trials (mesh quality, drawing force, and material data).
Corresponding flow stress data for AISI-1020 were taken from the build-in material database.
Table 1 Feed angles and corresponding drawing forces in die drawing simulation Model No. 1 2 3 4 Original 5 6 7 Feed angle φ [°] 16 20 24 26* 26 28 32 36 Drawing force F [kN] 163 160 155 146 156 153 158 165 * Transition fillet between conical and cylindrical working surface of the die Fig. 3 shows the drawing force as the function of feed angle φ. 2-nd degree polynomial has been used to fit calculated data (the fitting equation is included in the figure).
The parabolic least squares approximation of the data in Fig. 3 doesn’t relate to any theoretical model or material behaviour expected.
The reduction of drawing force leads to higher productivity and/or lower energy consumption and lower tool wear.
Online since: September 2023
Authors: Suthida Rungkron, Sunisa Soetsom, Suriya Sukyee, Punnama Siriphannon
Introduction Today's agricultural challenges include yield reduction, diminishing cultivable land due to globalization, less nutrient efficiency, lack of nutrient availability in soil, and lack of water accessibility.
Chemical composition, TGA data and DSC data of MMT/xCS-20KNO3-1TPP nanocomposites having various chitosan contents Sample Chitosan content (wt%) Molar ratio of K2O/ SiO2 TGA weight loss (wt%) DSC data (I) 50 – 100 oC (II) 210 – 490 oC (III) 500 – 700 oC Tm (oC) DH (J/g) MMT/2.5CS-20KNO3-1TPP 2.5 2.86 3.037 7.201 8.369 204.9 70.8 MMT/5CS-20KNO3-1TPP 5.0 2.89 3.651 10.072 7.554 203.2 83.2 MMT/10CS-20KNO3-1TPP 10.0 2.84 3.789 15.223 5.521 199.4 86.6 Table 1 also includes the onset melting temperature (Tm) and melting enthalpy (DHm) of MMT/xCS-20KNO3-1TPP nanocomposites with varying chitosan contents that were analyzed by DSC.
These findings corroborated the lower weight loss in stage (III) of TGA data.
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