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Online since: December 2012
Authors: Lei Pan, Huan Wang
The wind data should be managed with right method; it would affect the results of the wind resources evaluation.
For the wind data management, some rules have prescribed definitely the methods about the wind power resources evaluation.
In general, the wind data includes the validating, correcting and calculation parameter of the wind resources evaluation.
Mardia.Statisties of directional data.
Statisties of direetional data (with discussion).
Online since: December 2014
Authors: Yang Yan, Xin Wu, Xiao Yun Zhang, Jun Lu
The data are sent to the unified signal management area.
Central management area receives the data, and the demodulation is taken, demodulated data are analyzed, the energy consumption are calculated to adjust the volume of data.
The key technologies of the system are mainly: (1) Data collection technology, according to the actual needs, assumed the system every collect a data set every hour, the system clock takes the timing reminding function, through the ZigBee network, thermostat control data are collected.
GPRS network mode is used, the user room temperature data and heat meter data are transmitted the nearest GPRS terminal
It can make full use of the existing communication cable, the data can be sent to the unified data through the monitoring center, optical cable communication is realized.
Online since: July 2014
Authors: Hung Chi Song, Long Sheng Huang
A comfortable and beautiful sidewalk environment can increase residents’ willingness to take a walk and ride a bicycle, and consequently can achieve the effectiveness of energy-saving and carbon reduction [3].
Hirsch (2008) [5]considered that a fine pedestrian space can reach the effectiveness of energy-saving and carbon reduction and urban greenification, and increase the interaction with each other.
In case of anything inappropriate, the feature of data linkage can be applied to make proper revision and review for the building model directly, and also can prevent the error in transmiting and communicating the information among various parties, and the mistake of construction in advance.
Moreover, it is able to effectively reduce the consumption of building materials and further to achieve the goal of cost reduction [10].
This study was based on the damage position that indicated in the floor plan of sidewalk, and adopted the general steps of making models to obtain the referal datum, including the cadastral map, before building such model.
Online since: May 2011
Authors: Mi Qi, Gui Quan Zhang, Tao Lin, Ting Gong, Xin Zhang
The sample (ca. 240 mg) was degassed at 200 oC and 1.3´10-3 Pa for 4 h before the measurement of data.
They assigned the H2-TPR peaks at 300 and 360 oC to the reduction of bulk-like Co3O4 phase (a two-step reduction process of Co3O4®Co2+®Co0), the H2-TPR peak at 430 oC to the reduction of the Con+ species and the H2-TPR peak at 550–800 oC to the reduction of the Cod+ species [9].
According to the previous works, the H2-TPR peaks at 220-250 and 300-330 oC are tentatively assigned to the stepwise reduction of bulk-like Co3O4®Co2+®Co0, the H2-TPR peaks at 400-430 and 560-590 oC are respectively attributed to the reduction of Con+ and Cod+ species on these catalysts [9, 10].
It is worth noticing, the reduction peaks of CoOx/MgAl2O4-HT shift toward the low temperature comparing with the corresponding reduction peaks of CoOx/MgAl2O4-CP and CoOx/MgAl2O4-SR.
On the other hand, the total H2 consumption of these catalysts is roughly estimated by the integration of the H2 reduction peaks area.
Online since: March 2013
Authors: Yong Lin Kang, Guo Ming Zhu, Xing Ye Guo
Main Influencing Factor of Rolling Pressure for H-Beam Rolling It is important to research the stress distribution along the contact arc, for it could provide an original datum for deducing the rolling force theoretically.
(a) friction coefficient 0.38 (b) friction coefficient 0.30 Fig. 3 Friction influence on the rolling pressure Flange/Web Stretching Ratio’ Compact on the Rolling pressure The simulated stress field was obtained under the condition of changing the horizontal roller reduction and maintaining the reduction of the vertical roller, which is shown in figure 4.
When the reduction of the horizontal roller is increased, the stretching rate is increased but the flange/web stretching ratio is decreased.
By means of change, the reduction of the web and the flange namely changing the flange/web stretching ratio, the rolling web wave phenomenon could be simulated.
From the analysis above, it is better to avoid the crucial condition of the rolling web wave and reduction of the web should not be too large.
Online since: March 2015
Authors: Godfrey Omonefe Ariavie, Joseph Oyetola Oyekale
Finally, field data was used in this study to validate the model which can be applied to any natural gas pipeline risk assessment scenario.
A pipeline risk assessment model is a set of algorithms or rules that use available information and data relationship to measure levels of risks along a pipeline.
Such a rare case would be where we have exactly the same situation as that from which the past observations were made and we are making estimates for a population exactly like the one from which the past data arose-.
It was sectioned into 12 segments at 1km interval and data were collected based on the following assumptions: I.
Applying the data above to the 12km pipeline length, we get: 0.1428/12 = 0.0119 events/km-yr.
Online since: June 2014
Authors: Si Shuan Wang
For question one and question two , we established a model of the actual capacity will be standardized different vehicles , and statistics in the video pcu amount of data analyzed by the choice of the trigonometric curve fitting using cftool Toolbox obtained as a function of the actual capacity and time , and finally by analyzing the relationship between the relevant factors and the number of vehicles in different lanes , traffic signal mechanism to complete the first two questions .
The data given in the problem into three of the four models, solve for T equal to about 5.5 minutes .
Lane is occupied is the result of traffic accidents, street parking , lane construction and other factors , leading to the driveway or road cross section capacity reduction in unit time phenomenon .
Fig.1 The actual capacity of the change process * Indicates the accident occurred during the evacuation to record data Connection fitting as sinusoid Fitting function 200 * sinx +1100 Graphical analysis : The figure shows a traffic accident occurred in the period between the withdrawal of an accident in which the cross-section of the actual capacity of the change process roughly , into periodic sinusoidal variation due to periodic changes in lights , when the red light traffic reduced, but not zero, which phase is not due to a right turn signal control .
Disadvantages model 1 , ( 1 ) in problems due to too little scientific data , and there will be some errors in the manual count, sometimes not guaranteed to be accurate , such as the time interval may be a few more seconds, resulting in the number of multi- car actual values ​​, resulting in an error . 2 , and, of course , the model also has shortcomings, narrow range of applications , but also for the model due to the length of a car occupied by a lack of data , the results obtained from the video analysis of large errors 7 .
Online since: May 2014
Authors: Thaned Satiennam, Pornsiri Urapa, Wichuda Satiennam, Tussawan Phacharoen
From these data, a speed profile for each individual vehicle and for a link could be derived.
Speed data was collected on the weekdays during off-peak hours when the drivers are able to select their speeds independently and it is more likely to be free flow traffic condition.
From these data, vehicle speeds at predetermined points along traffic calmed links were computed.
The extreme values in each data set was considered as mistakes and then excluded from further analysis.
From these data, relationship between mean speed and distance which has been termed a speed profile were developed to reveal the driver’s behavior when negotiating the speed bumps and speed humps.
Online since: March 2016
Authors: Chen You, Dan Dan Jin, Hao Ran Zheng, Lei Wang, Meng Meng Wang, Min Fang Chen
Developing of a new Mg matrix composite with high damping performance and high strength rate has been acknowledged as an important approach for the reduction of vibrations and prevention of noise.
Simultaneous reduction of vibrations and prevention of noise is therefore highly important [1,2].
Such a composite can be used to develop joint implants with a new type of vibration reduction of biological materials [10].
The data for the tensile strength and elongation of the composites are presented in Table 2.
Additionally, higher HA content leads to reduction of the grain size and an increase in the number of grain boundaries.
Online since: November 2012
Authors: Jin Zhao Zhang
Between motor and roll, a planet cycloidal needle wheel decelerator is stringed to obtain the reduction ratio as 15:1.
When controlling three motors in this paper, multiple background data block is used to reduce the number of data blocks , as shown in Fig.2. where, FB10 is called in the OB1, then FB1 is called(by eace motor) in FB10 to control three-motor system.
All the data of FB1 is stored in its background data block DB1 for each calling.
Data sampling includs collecting the data of speed and the tension response, recording speed and regulation of tension that PID controller output to the inverter in corresponding time.
Given different data section of the input, then the static characteristics is measured from output response.
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