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Online since: September 2013
Authors: Xiao Ming Wang, Li Zhang
Traditional method At present, in energy loss calculation, and on the basis of collection of different data, using the common calculation methods are mainly electricity method, the RMS current method and so on[3][4].
The grid basic data acquisition, including power grid line the first paragraph supply, reactive power and representative day 24h current, voltage 24h voltage.
Basic statistical data as is shown in tab 1.
However, use improved Newton's method for grid loss calculation, because the data collection process of fully considering load change.
References [1] Zhang Lisheng, “Power Network Energy Loss in Management and Loss Reduction Technology,” M.China Power Press, 2005
Online since: January 2005
Authors: D.J. Chen, J. Lu, Y.D. Zheng, B. Shen, N.J. Tang
The reduction of magnetoresistance is called negative magnetoresistance, which is due to the weak localization in disordered semiconductor systems.
There is the best theoretical fitting for the data at 1.5K.
From the fitting data we obtain the spin-orbit scattering time τso at different temperatures.
The data of scattering time τso indicate that the spin-orbit effect dominates the upper band.
Because of the correlation between the spin-orbit effect and intersubband scattering, the data also indicate that the intersubband scattering becomes stronger with increasing temperature.
Online since: October 2010
Authors: Yu Cai, Ji Ne Zhu, Sheng Li Zhao, Qing Hua Chang
The diffraction data is analyzed by the software of the X’ pertHighxcore which indicates that main diffraction peaks shift to a high angle direction with the increasing of cobalt content.
It can be seen that the lattice constant of LiMn2O4 is slightly smaller than that of standard data (a=0.82476) and it decreases with the increasing of cobalt content, which indicates that doping Co is helpful to decrease the crystal cell volume and enhance the spinel structure stability.
In addition, compared with the standard XRD data of the spinel LiMn2O4, the peaks of LiCoxMn2-xO4 powder are low and wide mainly due to the smaller crystal grains.
Mn3+ Mn4++e (3) However, analysis of the XRD data indicates that a few Co3+ replace Mn3+ position in the lattices of LiMn2O4 by substitution doping consequently resulting in a lower Mn3+content.
Thus, the Li+ amount in the process of intercalation and deintercalation is lessened correspondingly leading to a reduction in the charge/discharge special capacities of LiCoxMn2-xO4 powder.
Online since: September 2013
Authors: Wei Zhang, Zhen Lu, Wei Song, Xiao Ming Chen, Xi De Lai
The method could acquire lots of points data which cover all the blade, but the requirements of the blade aerodynamic performance was not taken into account.
The point clouds acquired by noncontact measurement did not need point registration but contained lots of noise points, different points and redundant data.
And its pretreatment process was “delete different points-repair point data by interpolation-smooth filter with Gaussian processes- sampling simplify on rate of curve”.
Triangulation of point cloud data.
And the points cloud after the pretreatment is shown in 5(b) with a points-reduction rate about 30%.
Online since: February 2014
Authors: Ling Yun Chen, Zhi Gang Li, Yu Shuang Li, Ming Ji Wang
To avoid above situation, a floating time window is added on the detected low frequency disturbance signal, whose latest data rejects the oldest one, which keeps 1024 data in the time window all the time.
Then the collected disturbance signal data can be calculated by FFT and contrast with the spectrum without disturbance whenever necessary.
Since the FFT data for 1024 spot with frequency 45 MHz are massive, their calculation time is long.
For convenient simulation, the standard signal can be set as the low frequency after frequency reduction [5].
Online since: September 2013
Authors: Ji Gang Wang, Zhen Zhong Fan, Qing Wang Liu, Shou Song Zhang, Yan Min Lou
The experimental data are shown in Table 3.
The experimental data are shown in table 4.
Table 4 Determination of completion fluid corrosion rate Specimen number Surface area 10-4m2 Quality g Quality of corrosion g Corrosion rate g/m2·h 1# 20.5 20.2469 20.2357 0.076 2# 21.4 20.7862 20.7740 0.079 average 20.9 20.5166 20.5049 0.077 Seen from the table, the average corrosion rate is 0.077 g/m2·h, less than the enterprise standard of Daqing oilfield limited liability company, the standard is 0.100 g/m2·h. 2.4 Completion fluid for the influence of different permeability cores Choose three different permeability of natural cores respectively into three core grippers, with 2.0% KCl solution measured core permeability , denoted by K1, injected completion fluid, after 24 hours measured core permeability, denoted as K2, Calculated Damage core rate, the experimental data are shown in Table 5.
Table 5 The influence of completion fluid on core permeability Core number K1 10-3μm2 K2 10-3μm2 Damage rate % 1-4 94.5 82.4 12.8 1-7 131.2 115.2 12.2 1-8 186.3 166.7 10.5 From the table can be shown, to the cores of different permeability and injection after completion fluid, permeability reduction, the higher the permeability of the core, completion fluid of core damage degree of the lighter.
For the different permeability core, the damage degree of completion fluid is less than 15%. 2.5 The influence of completion fluid immersion time on core permeability Choose four similar permeability of natural core respectively into four core gripper, four cores respectively by different soaking time, determine the core permeability after soaking and calculate the damage rate, the experimental data are shown in Table 6.
Online since: September 2013
Authors: Ling Jian Song, Yong Sheng Li, Shi Xu Li, Wei Lin Cui
So the demulsifier’s optimization of the indicators and the effect of the demulsifier on oil-water emulsion about the rheology should be studied to provide comprehensive basis to systematical evaluate the quality of dmulsifier and offer the reference for choice of emulsification and viscosity reduction .
Latterly, the statistical data of particlesize measured by granulometer is comparaed to calculate the optimal concentration.
Chart 1: The evaluation data of demullsifier efficiency P10 and P1um at 35℃ drug Dosage (ppm) D10 Blank D10 dosing P10 C1um mg/l P1um S3 10 1.78 1.81 2.34 1.31 1.02 0.214 10# 10 1.64 1.96 12.30 7.5 0.42 0.035 S1 10 1.82 2.35 89.75 49.31 0 0 The effect of demulsifiers on the emulsion The Fig.1 demonstrate the curves when the apparent viscosity changes with different water cut at the shearing rate of 200 s-1 at 45℃ .
Fig.1 The curve of the apparent viscosity varing with water cut before and after putting demulsifiers (45℃) Fig.2 The Semi-log rheological curve of the emulsion under different watercut before and after putting demulsifier (35℃) Fig.3 The curve of the apparent viscosity varing with temperature before and after putting demulsifiers(the water cut is 60%) Fig.4 The curve of the rheological index varing with water cut before and after putting demulsifier (35℃) Experimental data fitting The emulsion is suppose to be pseudoplastic fluid firstly, if the correlation coefficient is 0.9 obtained by means of power-law formula fitting, then the hypothesis is correct[4].
The data of the relation between the stirring rate and the shearing stress is suit with power-law formula fitting with the different water cut to get the rule of the rheological index and the consistency index.The Fig4 demonstrate the changing curve that the rheological index vary with water cut before and after adding demulsifiers at 35 ℃.
Online since: May 2014
Authors: Pongjet Promvonge, Panuwat Hoonpong, Sirisawat Juengjaroennirachon, Supattarachai Suwannapan, Monsak Pimsarn
The thermocouple voltage outputs were fed into a data acquisition system and then recorded via a personal computer.
The uncertainty in the data calculation was based on Ref. [8].
Data Reduction The average heat transfer coefficients are evaluated from the measured temperatures and heat inputs, with heat added uniformly to fluid () and the temperature difference of surface and fluid (), average heat transfer coefficient will be evaluated by: (1) in which, (2) The term A is the convective heat transfer area of the heated wall whereas is the average surface temperature.
For all, the data of Nu/Nu0 and f/f0 are compared at similar pumping power conditions.
Online since: April 2014
Authors: Jin Peng Tang, Ling Lin Li
The resource reservation protocol RSVP (Resource Reservation Protocol) uses a similar "centralization" way to allocation of resources, to ensure that the application of communication data flow service quality, is a kind of resource reservation algorithm based on.RSVP through special data packets are transmitted to the future path of communication stream will be after, to find the right path, and through the reverse data packets along the stepwise marker in support of RSVP protocol router, or through the retention of future communication stream transmission bandwidth or delay to guarantee the transmission capacity In this solution, each intersection if it is found that the special vehicles, the intersection agent need to simulate the vehicle destination path addressing, and in addressing process, each intersection node notifies the pathway, were labeled in the routing table of the priority list, for traffic the resource reservation.
IA0 to notify other named IAn.SV to send information back to, IA0 further data processing, and operation design see IA0 below.
Adjust traffic control lamp receives the IAn TCA: message, until the vehicle adjustment leave again reduction to traffic lights program routine, safeguard the traffic.
Online since: September 2015
Authors: Massimo Rossetto, A. Tridello, D.S. Paolino, G. Chiandussi
The experimental data have been fitted by considering the statistical model proposed in [5].
A better estimation of the Supreme fatigue strength is needed, since the experimental data considered for S-N curve fitting shows a large scatter (Figure 3).
The Gumbel plot in Figure 5 shows the experimental data together with the estimated statistical distributions for both steels.
Figure 5: Gumbel plot showing fitting of experimental data for the two H13 steels.
The ESR allows for a significant reduction of the inclusions size and therefore enhances the VHCF strength of the H13 steel.
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