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Online since: August 2004
Authors: J.H. Park, Joo Sun Kim, C.H. Chang, M.K. Joo, Kyu Young Kim
However, the organic
coatings may be degraded under various service conditions, and their degradation may result to a
reduction of their anti-corrosive effectiveness.
In order to determine corrosion products under the organic coating, XAS data were collected from both blister region and intact area.
Whilst a considerable progress has recently been made in the theoretical treatment of XANES (X-ray Absorption Near-Edge Structure) spectra [15], qualitative treatment, relying on comparing the data from experiments with those obtained from appropriate reference compounds, remains by far the most widely used approach.
In order to determine corrosion products under the organic coating, XAS data were collected from both blister region and intact area.
Whilst a considerable progress has recently been made in the theoretical treatment of XANES (X-ray Absorption Near-Edge Structure) spectra [15], qualitative treatment, relying on comparing the data from experiments with those obtained from appropriate reference compounds, remains by far the most widely used approach.
Online since: May 2011
Authors: Ming Yan Qiu, Yong Sheng Niu, Ai Min Wei, Ai Qin Liu
Azo compounds can be prepared by the standard diazo-coupling method and by reduction of aromatic nitro-compounds[9,10], but these methods can not be used to synthesize azo aromatic diacyl chlorides.
All the compounds gave satisfactory analytical and spectroscopic data.
Spectral data Azobenzene-4,4'-dicarboxylic acid chloride, 3a: m.p:164-165°C; Dark-red needles; Yield 88%; IR (KBr): 3095, 1778, 1734, 1596, 1577, 1475cm-1; 1HNMR (400MHz, CDCl3):δ 8.06 (d, 4H, J =7.2Hz, ArH), 8.32 (d, 4H, J = 8.8Hz ArH); For C14H8Cl2N2O2: Calcd: C, 54.72; H, 2.61; N, 9.12.
All the compounds gave satisfactory analytical and spectroscopic data.
Spectral data Azobenzene-4,4'-dicarboxylic acid chloride, 3a: m.p:164-165°C; Dark-red needles; Yield 88%; IR (KBr): 3095, 1778, 1734, 1596, 1577, 1475cm-1; 1HNMR (400MHz, CDCl3):δ 8.06 (d, 4H, J =7.2Hz, ArH), 8.32 (d, 4H, J = 8.8Hz ArH); For C14H8Cl2N2O2: Calcd: C, 54.72; H, 2.61; N, 9.12.
Online since: July 2011
Authors: Li Jun Wang, Jun Zhao, Dan Ying Gao
Fig.2 Strain nephograms at crack/failure states
crack state of BSWA-10-70
failure state of BSWA-10-70
crack state of BSWA-00-40
failure state of BSWA-00-40
crack state of BSWA-10-40
failure state of BSWA-10-40
Fig.3 Comparison chart of ductility coefficients
Fig.4 Comparison chart of ductility coefficients
Based on the data in table 2, the relationships of ductility coefficients and the volume fraction of steel fibers are showed in figure 3.With the increase of the volume fractions of steel fibers, the ductilities of shearwalls improve gradually.
Based on the data in table 3, the relationships of ductility coefficients and the concrete strength are showed in figure 4.With the increase of the concrete strength, the ductilities of shearwalls reduce gradually.
When the concrete strengths vary from C30 to C40 and C70, the reduction degrees of ductility coefficients are 1.84% and 4.5%.
Based on the data in table 3, the relationships of ductility coefficients and the concrete strength are showed in figure 4.With the increase of the concrete strength, the ductilities of shearwalls reduce gradually.
When the concrete strengths vary from C30 to C40 and C70, the reduction degrees of ductility coefficients are 1.84% and 4.5%.
Online since: May 2012
Authors: Thierry Ouisse, Jean Marc Dedulle, Didier Chaussende, Julien Lefebure
Most of the calculation details regarding induction heating, heat transfers and fluid dynamics have been presented in a previous paper which included both the models and data used [4].
To get rid of thermo-capillary convection and more generally of any turbulent flow, which appeared to be very harmful in the TSSG process of SiC [4], we first designed totally new crucible geometry with a special care paid to the reduction of the temperature gradients.
The model should be further refined so as to better match the experimental data.
To get rid of thermo-capillary convection and more generally of any turbulent flow, which appeared to be very harmful in the TSSG process of SiC [4], we first designed totally new crucible geometry with a special care paid to the reduction of the temperature gradients.
The model should be further refined so as to better match the experimental data.
Online since: June 2013
Authors: Jian Hong Chen, Rui Liu, Qing Lie Su, Hong Cao
According to statistic data, the rate of wedging or hitting bridge about large trucks stays at a high level [2].
The optical signal modulation circuit is shown in Fig.2. 1.2 Design of the Optical Signal Demodulation Circuit For receiving circuits, the SCM of receiving signal is used to process the received data.
Judging the rising-edge and falling-edge can enable and turn off the timer, next calculates the pulse width, and then comparing it with the reduction of the pulse width (preset value) can calculate the number of sensors being obscured, according to the number, the height of the vehicle can be calculated precisely .The algorithm is only suitable for measuring objects without hollow.
The optical signal modulation circuit is shown in Fig.2. 1.2 Design of the Optical Signal Demodulation Circuit For receiving circuits, the SCM of receiving signal is used to process the received data.
Judging the rising-edge and falling-edge can enable and turn off the timer, next calculates the pulse width, and then comparing it with the reduction of the pulse width (preset value) can calculate the number of sensors being obscured, according to the number, the height of the vehicle can be calculated precisely .The algorithm is only suitable for measuring objects without hollow.
Online since: October 2020
Authors: Aleksandra Victorovna Frolovskaia, Inna Y. Petukhova, Yulia M. Petrova, Nadezhda Yu. Klinduh, Irina I. Terekhova
The initial data include facing of ceramic-granite 600х1200х12mm slabs, of 12 kg/m2 weight.
When considering the idealized scheme, where all the elements work together, we observe the resulting static force calculation and design the facade system in accordance with these data.
If we assume that some elements fail as a result of the above factors, then the reduction of the bearing capacity of the frame elements will lead to an increase in stresses in other elements, which was not originally provided.
When considering the idealized scheme, where all the elements work together, we observe the resulting static force calculation and design the facade system in accordance with these data.
If we assume that some elements fail as a result of the above factors, then the reduction of the bearing capacity of the frame elements will lead to an increase in stresses in other elements, which was not originally provided.
Online since: October 2012
Authors: Xiao Yu Sun, Hong Tao Xing, Yong Heng Tong, Zhen Qing Wang
This creates a deterioration in the level of service, delays and sometimes even a reduction in the level of safety owing to impatient, hasty and unsafe passing maneuvers.
Data collection and simulation The approach employed in this study consisted of both theoretical development and simulation analyses.
For the calibration of the simulation, data was collected on five segments of two-lane rural highways in northern Israel, with slopes ranging from 3 to 6%.
Data collection and simulation The approach employed in this study consisted of both theoretical development and simulation analyses.
For the calibration of the simulation, data was collected on five segments of two-lane rural highways in northern Israel, with slopes ranging from 3 to 6%.
Online since: September 2013
Authors: Chang Liang Xu, Xi Wang
According to the data of universal joint shaft drawing data, label materials are BS10250-3, 30NiCr Mo8; Rm =850 MPa, Re= 640 MPa.
By using the commonly used approximate formula, force arm is equal to half of contact arc length projection L: (3) Where, R is the radius of the roller, Δ h is reduction.
By using the commonly used approximate formula, force arm is equal to half of contact arc length projection L: (3) Where, R is the radius of the roller, Δ h is reduction.
Online since: April 2014
Authors: Hui Min Zhuang, Jian Guo Zhang
Integration of the surface pressures leads to the time series data of base moment coefficient, of which the amplitude and frequency-domain characteristics were studied and compared with those of the single-tower.
Wind tunnel test and model summary The wind tunnel test with simultaneous surface pressure measurement was carried out in TJ-2 atmospheric boundary layer wind tunnel in the state key laboratory for disaster reduction in civil engineering in Tongji University.
Fig. 5 Frequency-domain characteristics of the base moment of interfered tower in 0o wind direction Summaries In this paper, a wind tunnel test with simultaneous surface pressure measurement was carried out and the relevant data analysis was done.
Wind tunnel test and model summary The wind tunnel test with simultaneous surface pressure measurement was carried out in TJ-2 atmospheric boundary layer wind tunnel in the state key laboratory for disaster reduction in civil engineering in Tongji University.
Fig. 5 Frequency-domain characteristics of the base moment of interfered tower in 0o wind direction Summaries In this paper, a wind tunnel test with simultaneous surface pressure measurement was carried out and the relevant data analysis was done.
Online since: December 2014
Authors: Hong Jun Yang, Yong Liang Liu, Xiao Hong Yu, Gang Song
Therefore, reduction of the network delay and jitter has always been the improved direction which the network equipment suppliers care for.
The MPLS network is in the middle of data link layer and network layer, belonging to the 2.5 layer protocol.[1] In an MPLS network the label switched path (LSP) is established for the message through the pre-assigned label.
It can provide nanosecond-level synchronization precision in a geographically dispersed network, therefore it is available to transmit all kinds of real-time services and data services for the network.[2,3] Fig. 1 Forwarding process of MPLS The IEEE 1588 standard defines 4 kinds of synchronous messages, including Sync, Follow_up, Delay_Req, and Delay_Resp.
The MPLS network is in the middle of data link layer and network layer, belonging to the 2.5 layer protocol.[1] In an MPLS network the label switched path (LSP) is established for the message through the pre-assigned label.
It can provide nanosecond-level synchronization precision in a geographically dispersed network, therefore it is available to transmit all kinds of real-time services and data services for the network.[2,3] Fig. 1 Forwarding process of MPLS The IEEE 1588 standard defines 4 kinds of synchronous messages, including Sync, Follow_up, Delay_Req, and Delay_Resp.