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Online since: October 2009
Authors: Hua Song, Li Hua Fu, Pei Long Wang, De Xin Ding, Hui Li
By using the data of certain factory, the limited value of original bending curvature radius is 63m. therefore, the 63m original bending curvature radius of 60kg/m heavy rail is taken as the study object.
The straightening machine is a 9-roller horizontal straightening device made by SMS, the basic parameter is: diameter D=1200mm, roller pitch t=1600mm, quantity of roller n=9, barrel length of roller L=300mm,straightening velocity =2400mm/s.The current reduction regulation (straightening reduction) of the straightening machine is described as following , the reduction of top straightening roller2# is 19.2mm, the reduction of top straightening roller 4# is 19.2mm, the reduction of top straightening roller 6# is 7.9mm and the reduction of top straightening roller 8# is 3.5mm.
Online since: November 2011
Authors: Wen Wang, Xu Duo Bai, Li Na Hao, Hai Jun Niu, Li Ping Hao
Mode 98BII computer electrochemical analysis system (Tianjin Branch of chemical electronic high-tech Co., Ltd.) was used to determine the CV data.
A pair of peak of oxidation-reduction (0.367 V/0.194 V) appears in the course of the initial deposition.
But the corresponding reduction peak is not clear.
Here the first pair of oxidation-reduction peak corresponds to the single-electron redox process and the followed pair of oxidation-reduction peak is attributed to a further oxidation process of one-electron.
There is no oxidation-reduction peak in the negative potential, but a pair of redox peaks appears in the positive potential area.
Online since: December 2014
Authors: Bai Feng Ji, Li Ding Liu, Bei Lei Xu
The principles of multivariate regression analysis were introduced firstly and the Typhoon disaster data over the east coast of China were analyzed.
Multiple regression prediction model on economic loss Typhoon disaster data.
Typhoon disaster data were from tropic cyclone disaster database provided by China Meteorological Administration (CMA), Ministry of Civil Affairs of China and Disaster Reduction Center of Chinese Academy of Sciences.
It included typhoon disaster data, including: the affected area, casualties of the population, down loss of housing, economic loss data and tropical cyclones minutes from 1991 to 2005, which were used to establish a multiple regression prediction model on economic loss.
Synchronization and monitoring data sample size is crucial in relation to further improving the accuracy of model predictions.
Online since: September 2015
Authors: Andrey A. Shevchenko, Vladimir V. Grechkin, Zoya S. Temlyakova
Marx Avenue, 20, Novosibirsk, Russia, 630073 zed_92@bk.ru, it@pfk-obnovlenie.ru, temlikova@edu.nstu.ru Keywords: asynchronous motor, numerical simulation, electromagnetic field, electrodynamic processes, squirrel-cage rotor, electrical motor design, experimental data, equivalent circuit Abstract.
The comparison with the experimental data obtained for the asynchronous motor with two squirrel-cage windings of the rotor is given.
Experimental data match the manufacturer’s test reports SPA “ELSIB” Inc.
Analysis of the investigation results of the ADKV asynchronous motors with squirrel-cage rotor shows the good agreement between the calculated and experimental data.
This fact, in turn, leads to the reduction in the number of prototypes in the process of preparing electrical machines for the mass production. 2.
Online since: May 2016
Authors: H.F. Wang, J.B. Wang
Data acquisition agent is in charge of dynamic data information acquisition.
Data processing agent is in charge of the data analysis, filtering and amplification.
Data show agent is responsible for the processed data and graphic images, and timely appear in front of the user.
The data was collected by data acquisition agent form the pressure and displacement sensors.
Finally the data result and figure were show by data show agent in a data display interface.
Online since: February 2012
Authors: Hai Bo Jiang, Chang Sheng Ji, Ying Qiu Shu, Jiang Li
Under the FE model developed based on the data, the calculation results can forecast the potential slide zone and time.
The modelling can be developed in the special software based on the metrical data.
Meanwhile, the instruments and sensor installation, data transfer and obtain are easier than spot.
Through compare the data change to forecast the landslide.
Numerical simulation can obtain the better data and images under the natural shape.
Online since: February 2018
Authors: Skaidrite Reihmane, Aina Bernava
Retting with use of enzymes allows a more controlled degradation of fibres and a reduction of effluents [3].
The reduction of costs for production of fibres for technological applications, an improvement of its properties, and use of novel products is very important.
Reduction of mechanical properties is observed in all cases of treatment, and it obviously is caused by avoiding impurities of cellulose fibres, mainly lignin.
Good correlation is observed between the relative values of tensile strength (Table 1) and microscopy data of investigated hemp and flax fibres.
Study of microscopy data of examined hemp and flax fibres shows that the effectiveness of both enzymes for separation of fibres from bundles (cottonization).
Online since: May 2012
Authors: Yun Wang, Can Zhang, Jin Chuan Zhang
For a given engine SFC, the reduction of thrust requirements essentially results in lower fuel consumption.
However, at a fixed specific thrust and engine thrust, an increase in T4 can result in a smaller core and, therefore, a higher engine bypass ratio; in some cases, a potential reduction in engine weight can more than compensate for a non-optimal thermal efficiency.
Fig 6 is its main parametric data.
Fig. 6 Main parametric data Through the calculation of a conventional and the intercooled V2533, also the design and analysis of intercooled aero engines system.
For the primary relatively short mission estimation here, this effect will increase the saving to 2.4%, whereas for the aircraft design range mission, this will correspond to a reduction in fuel burn up to 4.0%.
Online since: December 2010
Authors: Yin Yang, Jia Yue Sun, Wen Cai Xu
Pigment: BaCaBO3F: Eu3+, Li+ phosphor synthesized by the high temperature method; Vehicles: domestic phenol-formaldehyde resin; Additives: dragging reduction improvers (varnish), dispersants (bentonite), oxidation inhibitors; Process paper: no visible light can be seen under the excitation of ultraviolet light such as 254 and 365 nm.
The excitation and emission spectra were recorded by using a Hitachi, F-4500 fluorescence spectrophotometer with a photomultiplier tube operating at 400 V, and a 150-W Xe lamp was used as the excitation lamp; the measured fluorescence spectra data were all calibrated under the same operating conditions.
The shear viscosity of this as-prepared fluorescent ink was measured by using a ARES-RFS rotation dynamometer operating at the rate of shear ranging from 0.2 s-1 to 50 s-1, and the measured data were all calibrated under the same operating temperature (32 ºC)[6].
In conditions of 3 % of the dragging reduction improvers, 2 % of the dispersants, and 1 % of the oxidation inhibitors, we gradually increased the fluoresce content (30%, 31%, 32%, …39%) to prepare the fluorescent anti-counterfeit offset printing ink.
The influence on additive amount of the luminescence properties of fluorescent ink was investigated widely in order to determine a more ideal ratio of fluorescent ink by analyzing the photoluminescence spectra, viz, 35% of BaCa0.7BO3F: 0.15Eu3+, 0.15Li+ phosphor as the pigment particles, 2% of the dragging reduction improvers, 2 % of the dispersants, 1% of the oxidation inhibitors and 57% of the resin vehicles.
Online since: February 2014
Authors: Yan Xu, Tao Luo, Qian Wang
Among them, the car's steering stability is particularly important that we take a look at the car swerved caused by the traffic accident data.
ESP computer calculates the theoretical values ​​to maintain vehicle stability, and then compare the yaw angular acceleration sensor and the measured lateral acceleration sensor data, determine the vehicle unstable forms.
From the above analysis if the ABS reduces target slip rate, the braking force is reduced, the lateral force is increased, if you reduce the vehicle rear side two wheels ABS target slip rate, the lateral force Fy3, Fy4 increases, Fy3, Fy4 reduced, Fy3, Fy4 increasing lead to increasing MZr, but also makes the reduction of Fx4 and MZr, thus the method of increasing the lateral force Fy3, Fy4 is not obvious.
Analysis known, if we reduce upper and lower limits of ABS work area, Fx1, Fx3 reduced, Fy1, Fy3 increases, and Fy1, Fy3 has the role of offset the vehicle center of gravity torque, Fy1, Fy3 increasing has little effect on the reduction of MZf, reducing longitudinal braking force Fx1, Fx3 by reducing the target slip rate of ABS leads to the reduction of torque MZf, at the same time , Fy1, Fy3 increasing also improving the ability of vehicle lateral resistance interfere ensuring the vehicle's lateral stability; increased outside wheel slip ratio curve working range limits can ensure the braking performance.
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