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Online since: June 2019
Authors: Alevtina Kapustina, Vitalii Libanov, Natalya Dombai, Sergei Gardionov, Victoria Gribova, Irina Khal'chenko, Nikolai Shapkin
According to the element analysis data, the least soluble fraction had the highest molybdenum content (Table 1).
Based on the element analysis data, the relative molecular weight of the elementary unit of this fraction was calculated.
The respective data are shown in Table 2.
This fragment size was calculated from the data of X-ray structural analysis of molybdenyl bis(acetylacetonate) [9].
As seen from the element analysis data, the compositions of these fractions did not virtually change after purification (Table 4).
Online since: May 2011
Authors: Hong Hua Ge, Jie Ting Tao, Xue Min Xu, Cheng Jun Wei, Xin Jing Meng
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.
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.
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.
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.
Online since: November 2012
Authors: Wen Ni, Jing Wang, Xu Fang Zhang
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.
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.
Online since: September 2013
Authors: Chang Gen Deng, Zhong Gen Xu, Kang Qin
Meanwhile, analysis of vibration types of transformation and rotation under seismic action is also carried out, in order to provide reference data for further elastic-plastic analysis.
However, the vibration of the structure often became the main reason of the engineering accident including damage of the structure, accuracy decreasing of a device or reduction of its reliability etc.
Online since: July 2011
Authors: Jun Qin, Ping Zong
The feature of BEB is that the size of CW depends on the number of collisions met by sending data packets.
SUM(send[i]) is the sum of data packets sending by the nodes during the NO.i monitoring cycle. 3.
When a node fails to send data, BEB algorithm would double the CW for the next channel competition.
This parameter reflects the ability of the network data processing.
The greater the throughput is, the stronger the network data processing capability is.
Online since: February 2011
Authors: Chao Yi Xia, Feng Li Yang, Tie Yi Zhong
Introduction Vibration reduction and isolation technology provide a new way for bridge antiseismic and has been used in railway bridge engineering in China, but there still are many problems not solved in calculation analysis and design theory.
Kyu-Sik Park et al. solved the contradiction between the reduction of the maximum forces and the increment of the beam displacement by introducing the weight coefficients [3].
According to the test datum of the lead core rubber bearings from China Academy of Railway Science, and [7]; =the relative displacement between beam and top of the pier at different time of the seismic excitation history; =the acceptable value of relative displacement between beam and top of the pier.
In order to acquire the reasonable parameters which meet both good vibration reduction effect and running safety requirement of vehicle, the dynamic optimization of the LRB dynamic controlling parameters is necessary and meaningful to the seismic isolation design for bridges
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