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Online since: May 2012
Authors: Rui Kun Zhang, Jin Wang, Ming Lei Shi, Hao Zhang
The enhancement effect of pile-base post-grouting was analyzed through the comparison static loading tests and summarization of literature data.
Fig. 1 shows the discreteness of pile test data, reflects the control level of the bored pile construction technology.
Whereas, the load- displacement gradient data of pile-base post grouting piles is more discrete.
The shaft resistance reduction effect caused by the upward of pile, and the delay of the enhancement effect of tip resistance have led to the phenomenon that the stiffness of pile-base post-grouting pile below the general bored pile at the low load level.
Fig. 1 shows the discreteness of pile test data, reflects the control level of the bored pile construction technology.
Whereas, the load- displacement gradient data of pile-base post grouting piles is more discrete.
The shaft resistance reduction effect caused by the upward of pile, and the delay of the enhancement effect of tip resistance have led to the phenomenon that the stiffness of pile-base post-grouting pile below the general bored pile at the low load level.
Online since: April 2015
Authors: Wen Jun Qi, Chun Lei Gan, Nan Zhou, Hai Yan Wang, Kaihong Zheng
On the basis of the hot compression data, critical stress (strain) or peak stress (strain) were determined with the assistance of the strain hardening rate versus stress curves.
The reduction in height is 60% at the end of the compression tests.
DRX volume fraction X is often calculated in terms of the data from the strain-stress curves and can be expressed as [10]: (3) where sp is the peak stress, ss is the steady state stress and s is the specific stress from flow curves.
(3) The kinetics models were developed to describe the evolution of DRX based on the stress–strain data, and the typical model at 923 K and 0.1 s-1 was expressed as (e < ec) (e ≥ ec) Acknowledgments The present work was supported by Ministry of Education of Guangdong Province University-industry Cooperation Project (No.2012B091100038), University-industry Cooperation Project of Guangzhou (No.7411447290986) and the PhD start-up fund of Guangzhou Research Institute of Non-ferrous Metals (No.2012B001).
The reduction in height is 60% at the end of the compression tests.
DRX volume fraction X is often calculated in terms of the data from the strain-stress curves and can be expressed as [10]: (3) where sp is the peak stress, ss is the steady state stress and s is the specific stress from flow curves.
(3) The kinetics models were developed to describe the evolution of DRX based on the stress–strain data, and the typical model at 923 K and 0.1 s-1 was expressed as (e < ec) (e ≥ ec) Acknowledgments The present work was supported by Ministry of Education of Guangdong Province University-industry Cooperation Project (No.2012B091100038), University-industry Cooperation Project of Guangzhou (No.7411447290986) and the PhD start-up fund of Guangzhou Research Institute of Non-ferrous Metals (No.2012B001).
Online since: June 2010
Authors: Chuan Jin Jiang
The study uses the data from a coastal
forest catchment.
i ix y i n= be a set of collected accident data.
There are many methods to pre-process data, such as data cleaning (cleaning incomplete, noisy, or inconsistent data), data integration (integrating different data sources), data normalization (scaling data value in a range, such as [0, 1]), data reduction (reducing huge dataset to smaller representation), etc.
This paper adopted data cleaning to pre-process meteorological data.
The original rainfall data is used as the predicted variables.
i ix y i n= be a set of collected accident data.
There are many methods to pre-process data, such as data cleaning (cleaning incomplete, noisy, or inconsistent data), data integration (integrating different data sources), data normalization (scaling data value in a range, such as [0, 1]), data reduction (reducing huge dataset to smaller representation), etc.
This paper adopted data cleaning to pre-process meteorological data.
The original rainfall data is used as the predicted variables.
Online since: December 2012
Authors: Yang Xu, Wei Wang, Xiu Wang, Xiu Ying Tang, Yi Zhe Chen, Yan Kun Peng, Wei Long Yang
(4) Data storage module.
RS232 data interface is adopted for data transmission.
Connect the input RS232 data line of the monitor with DSP output interface, and connect the output RS232 data line of the monitor with DSP input interface.
Data transmission level for serial interface communication are eight bits, when building a communication protocol, the former 2 bits are defined for flag bits, and the rests are corresponding numerical data.
Design of Data Storage Module Data storage module is the vital intermediate link for delivering the fertilization information supplied by the soil fertility information system.
RS232 data interface is adopted for data transmission.
Connect the input RS232 data line of the monitor with DSP output interface, and connect the output RS232 data line of the monitor with DSP input interface.
Data transmission level for serial interface communication are eight bits, when building a communication protocol, the former 2 bits are defined for flag bits, and the rests are corresponding numerical data.
Design of Data Storage Module Data storage module is the vital intermediate link for delivering the fertilization information supplied by the soil fertility information system.
Online since: April 2011
Authors: Qi Shu, Bing Gang Wang
Discrete statistical analysis of the random measurement data about oil field workers was performed according to the probability distribution theory.
Different from SolidWorks, CATIA has special ergonomics analysis module and provides the human body data of American, Canadan, Korean and French, except for Chinese.
One is modification of the detailed Korean data which are similar to Chinese [5], the other is to create a file containing information about the target population directely.
The detailed procedure is defining a complete human body model data, adding it into the CATIA body model lib and setting the parent products, model name, sex and human body percentiles [6].
The optimized data were illustrated in table 1.
Different from SolidWorks, CATIA has special ergonomics analysis module and provides the human body data of American, Canadan, Korean and French, except for Chinese.
One is modification of the detailed Korean data which are similar to Chinese [5], the other is to create a file containing information about the target population directely.
The detailed procedure is defining a complete human body model data, adding it into the CATIA body model lib and setting the parent products, model name, sex and human body percentiles [6].
The optimized data were illustrated in table 1.
Online since: December 2012
Authors: Dong Sheng Yang
Optical fiber gyro can not only accurately determine angular rate, but also through the integral angular rate data provide direction.
Software Design According to the requirement of engineering system design, no matter any design a system, to the whole system, first according to function, time and the direction of the data communication relationship divided into several subsystems, between each subsystem clarity of time has the relationship or simultaneously, the stability of the data communication way.
According to such requirements, and combined with the design of the hardware part will be fully digital closed loop fiber-optic gyroscope system is divided into: initialization system, the happening of the modulated signal, signal collection, digital signal from the FIFO read DSP, DSP data treatment, the output signal to the next and feedback cycles.
Each part of the timing relationships and data communication direction as shown in figure 2.
Figure 2 Parts timing relationships, data flow direction Conclusions The light path part and circuit of the composition, the light path in part by the broadband light source, optical couplers, multi-function integrated optical chips and optical fiber coil form, by amplifier circuit of the filter circuits, A/D conversion, logic circuit, D/A converter, etc.
Software Design According to the requirement of engineering system design, no matter any design a system, to the whole system, first according to function, time and the direction of the data communication relationship divided into several subsystems, between each subsystem clarity of time has the relationship or simultaneously, the stability of the data communication way.
According to such requirements, and combined with the design of the hardware part will be fully digital closed loop fiber-optic gyroscope system is divided into: initialization system, the happening of the modulated signal, signal collection, digital signal from the FIFO read DSP, DSP data treatment, the output signal to the next and feedback cycles.
Each part of the timing relationships and data communication direction as shown in figure 2.
Figure 2 Parts timing relationships, data flow direction Conclusions The light path part and circuit of the composition, the light path in part by the broadband light source, optical couplers, multi-function integrated optical chips and optical fiber coil form, by amplifier circuit of the filter circuits, A/D conversion, logic circuit, D/A converter, etc.
Online since: October 2012
Authors: Hui Fang, Wei Tang, Yan Jing Meng
The driving is controlled by speed and the datum speed comes from the standard of running speed.
The update mode of closed loop speed can be used in the conditions of usually changing papers, having the more large width of rollers and getting precise inertia data.
PLC according to running speed and real diameter calculates the driving benchmark of rev datum.
Algorithm of rev datum in the procedure: in which Rd: Rev datum; : Practical linear velocity; : Practical diameter; : Minimum diameter of roll; : Reduction ratio of gear case; AI: Analog input Calculation of diameter of roll.
The calculation of diameter of roll bases on linear velocity datum and that assuming the practical linear velocity and linear velocity datum is the same.
The update mode of closed loop speed can be used in the conditions of usually changing papers, having the more large width of rollers and getting precise inertia data.
PLC according to running speed and real diameter calculates the driving benchmark of rev datum.
Algorithm of rev datum in the procedure: in which Rd: Rev datum; : Practical linear velocity; : Practical diameter; : Minimum diameter of roll; : Reduction ratio of gear case; AI: Analog input Calculation of diameter of roll.
The calculation of diameter of roll bases on linear velocity datum and that assuming the practical linear velocity and linear velocity datum is the same.
Online since: May 2011
Authors: Jie Ting Tao, Xue Min Xu, Cheng Jun Wei, Xin Jing Meng, Hong Hua Ge
Sodium hypochlorite is a kind of oxidizing biocide, and Cl- is the final product of its reduction process.
Figure 1 The polarization curves of stainless steel electrode containing sodium hypochlorite of different concentrations (Data in this figure correspond to the concentration of sodium hypochlorite) Figure 2 The polarization curves of stainless steel in raw water containing 20mg/L sodium hypochlorite (Data in this figure correspond to the deposited time (day)) Effect of dodecyl dimethyl benzyl ammonium bromide on the anti-corrosion performance of stainless steel Dodecyl dimethyl benzyl ammonium bromide is one kind of the biocide of quaternary ammonium salt.
Figure 3 The polarization curves of stainless steel in the raw water containing dodecyl dimethyl benzyl ammonium bromide of different concentrations (Data in this figure correspond to the concentrations of dodecyl dimethyl benzyl ammonium bromide (mg/L)) Figure 4 The polarization curves of stainless steel in raw water containing 100mg/L dodecyl dimethyl benzyl ammonium bromide (Data in this figure correspond to the deposited time (day)) Effect of isothiazolinone on the anti-corrosion performance of stainless steel Isothiazolinone is a kind of non-oxidizing biocide.
Figure 5 The polarization curves of stainless steel in raw water containing isothialinone of different concentrations (Data in this figure correspond to the concentrations of isothialinone (mg/L)) Figure 6 The polarization curves of stainless steel in raw water containing isothialinone of 10mg/L (Data in this figure correspond to the deposited time (day) after adding agent to the raw water under the normal temperature) Conclusions Biocides such as sodium hypochlorite and dodecyl dimethyl benzyl ammonium bromide containing halogen can prompt the pitting corrosion of 304 stainless steel.
Figure 1 The polarization curves of stainless steel electrode containing sodium hypochlorite of different concentrations (Data in this figure correspond to the concentration of sodium hypochlorite) Figure 2 The polarization curves of stainless steel in raw water containing 20mg/L sodium hypochlorite (Data in this figure correspond to the deposited time (day)) Effect of dodecyl dimethyl benzyl ammonium bromide on the anti-corrosion performance of stainless steel Dodecyl dimethyl benzyl ammonium bromide is one kind of the biocide of quaternary ammonium salt.
Figure 3 The polarization curves of stainless steel in the raw water containing dodecyl dimethyl benzyl ammonium bromide of different concentrations (Data in this figure correspond to the concentrations of dodecyl dimethyl benzyl ammonium bromide (mg/L)) Figure 4 The polarization curves of stainless steel in raw water containing 100mg/L dodecyl dimethyl benzyl ammonium bromide (Data in this figure correspond to the deposited time (day)) Effect of isothiazolinone on the anti-corrosion performance of stainless steel Isothiazolinone is a kind of non-oxidizing biocide.
Figure 5 The polarization curves of stainless steel in raw water containing isothialinone of different concentrations (Data in this figure correspond to the concentrations of isothialinone (mg/L)) Figure 6 The polarization curves of stainless steel in raw water containing isothialinone of 10mg/L (Data in this figure correspond to the deposited time (day) after adding agent to the raw water under the normal temperature) Conclusions Biocides such as sodium hypochlorite and dodecyl dimethyl benzyl ammonium bromide containing halogen can prompt the pitting corrosion of 304 stainless steel.
Online since: November 2012
Authors: Wen Ni, Xu Fang Zhang, Jing Wang
The data in this paper were laboratory data, laboratory data were different with engineering practice, so we can not take the laboratory data directly to do with the strength of the GB standards.
According to literature, the strength of the laboratory should be discounted, and reduction factor of about 0.5 [7].
So the laboratory strength data were twice more compared to the standard.
The application of stabilizer aimed for the consolidation of the road subgrade, and the 7 d compressive strength of cementitious materials up to 3~4 MPa according to soil stabilizer (CJ/T3073-1998), so the strength data of laboratory should in 6~ 8Mpa.
According to literature, the strength of the laboratory should be discounted, and reduction factor of about 0.5 [7].
So the laboratory strength data were twice more compared to the standard.
The application of stabilizer aimed for the consolidation of the road subgrade, and the 7 d compressive strength of cementitious materials up to 3~4 MPa according to soil stabilizer (CJ/T3073-1998), so the strength data of laboratory should in 6~ 8Mpa.
Online since: September 2014
Authors: Zhi Gang Jia, Xing Xuan Wang
In literature [1] the step response identification method needs integral computation of measurement data and is only for step response.
There are two problems in algorithm previously mentioned: First, it is a heavy job to calculate all the measurement data.
There is an interesting phenomenon, i.e. not the more noise reduction the better.
Parameter identification by square signal is more effective than step signal in some case according to the data of the second row in table 4 and data in table 2.
A Continuous-Time Linear System Identification Method for Slowly Sampled Data.
There are two problems in algorithm previously mentioned: First, it is a heavy job to calculate all the measurement data.
There is an interesting phenomenon, i.e. not the more noise reduction the better.
Parameter identification by square signal is more effective than step signal in some case according to the data of the second row in table 4 and data in table 2.
A Continuous-Time Linear System Identification Method for Slowly Sampled Data.