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Online since: July 2012
Authors: Yu Qiu Song, Jun Ling Wang, Zu Li Zhang, Xin Xin Zhu
The modal can be obtained by the following ways: Block Lanczos, subspace; Power Dynamics; reduction method; unsymmetrical modal algorithm method; damping law.
He calculated data showed that the natural frequency is higher and the amplitude is smaller of 2 to 4-order, it is not easy to resonate with external vibration and it has little effect on the life and quality of the headstock; . the natural frequency is lower and the amplitude is greater of 5 to 9-order, it is easy to resonate with external vibration and it has great effect on the life and quality of the headstock., so in actual design, attention should be paid to avoid external vibration of similar frequency with the headstock.
Conclusion 1) By comparing calculated data in Figure 2,3 and 4 and the modal analysis results in Figure 5,6 and 7, it can be concluded that the dynamic rigidity of Design III is greater than that of Designs I and II. 2) As the implements are mounted on tractor, most of the external excitation frequency was generated by the tractor's engine.
He calculated data showed that the natural frequency is higher and the amplitude is smaller of 2 to 4-order, it is not easy to resonate with external vibration and it has little effect on the life and quality of the headstock; . the natural frequency is lower and the amplitude is greater of 5 to 9-order, it is easy to resonate with external vibration and it has great effect on the life and quality of the headstock., so in actual design, attention should be paid to avoid external vibration of similar frequency with the headstock.
Conclusion 1) By comparing calculated data in Figure 2,3 and 4 and the modal analysis results in Figure 5,6 and 7, it can be concluded that the dynamic rigidity of Design III is greater than that of Designs I and II. 2) As the implements are mounted on tractor, most of the external excitation frequency was generated by the tractor's engine.
Online since: September 2013
Authors: Xiao Guo Chen, Yue Yang
This paper improves the the commonly used model of joints in the used model and than derives the displacement formulas of the improved used model; Conditioned by survey and design data of the section between Harbin Engineering University Station and Taiping Bridge Station of Harbin Metro Line 1, comparative analysis is made by used model and improved model aimed at researching deformation of soil.
This paper thinks of stiffness reduction(the value is set as ).
Conditioned by data of geology and segments of the section between Harbin Engineering University Station and Taiping Bridge Station of Harbin Metro Line 1, these formulas are used to the actual displacement of some segment sections.
This paper thinks of stiffness reduction(the value is set as ).
Conditioned by data of geology and segments of the section between Harbin Engineering University Station and Taiping Bridge Station of Harbin Metro Line 1, these formulas are used to the actual displacement of some segment sections.
Study on Multidimensional Intelligence for Realizing Seamless Power Supply between the Port and Ship
Online since: September 2014
Authors: Le Ming Xiao, Yan Qiong Song
And intelligently dealing with electricity bills processing, as well as seamless power supply, which realize marine energy conservation and low-carbon emissions reduction in the port, can ensure to realize uninterruptable power on-shore connection, and at the same time promote the development of intelligent port.
Introduction It can be able to realize uninterruptable power on-shore connection board the ship, through the use of seamless power supply and intelligently dealing with electricity bills processing, so as to realize the ship energy conservation and emissions reduction in port.
Power system management can be proceeded via the alarm monitoring, data monitoring and the analysis; and also can change 10.0 kV/50 Hz, 6.0 kV/50 Hz power system in harbor grid by frequency conversion to 6.6 kV/60 Hz A.C. system, and also control the power supply of better quality; more scientific measurement of electricity can be carried out according to the market price, equipment and management cost; meanwhile,running simulation and processing information, through flexible building and configuration, it can carried out that integrity of shore power equipment management, monitoring, control, protection, billing and simulation and information processing, each of which is independent on the function, so as to satisfy the requirement of high voltage level shore power access.
Computer control closed KM3 after in parallel transferring load, at this time the ship power grid has entered into a state of shore power supply, computer proceeds to real-time detect power of load board the ship and the quantity of electricity through statistic, and to store data about quantity of electricity consumption.
When shore power was connected into marine electric power system, GTO conducting, there is circulation current between shore power transformer and marine generators before the synchronization, as long as circulation current reaches a certain value, the gate control gain the control signal, GTO disconnect, and L reactor access current limit and automatic synchronization, as well as, marine generators have finished synchronization, marine generators exit, shore power transformer begins to supply power; in the case of normal circulation current, the gate can get computer time signals and the circulation current detection data signals at the same time , GTO conducting, L reactor shorted, and shore power transformer suppling power directly.
Introduction It can be able to realize uninterruptable power on-shore connection board the ship, through the use of seamless power supply and intelligently dealing with electricity bills processing, so as to realize the ship energy conservation and emissions reduction in port.
Power system management can be proceeded via the alarm monitoring, data monitoring and the analysis; and also can change 10.0 kV/50 Hz, 6.0 kV/50 Hz power system in harbor grid by frequency conversion to 6.6 kV/60 Hz A.C. system, and also control the power supply of better quality; more scientific measurement of electricity can be carried out according to the market price, equipment and management cost; meanwhile,running simulation and processing information, through flexible building and configuration, it can carried out that integrity of shore power equipment management, monitoring, control, protection, billing and simulation and information processing, each of which is independent on the function, so as to satisfy the requirement of high voltage level shore power access.
Computer control closed KM3 after in parallel transferring load, at this time the ship power grid has entered into a state of shore power supply, computer proceeds to real-time detect power of load board the ship and the quantity of electricity through statistic, and to store data about quantity of electricity consumption.
When shore power was connected into marine electric power system, GTO conducting, there is circulation current between shore power transformer and marine generators before the synchronization, as long as circulation current reaches a certain value, the gate control gain the control signal, GTO disconnect, and L reactor access current limit and automatic synchronization, as well as, marine generators have finished synchronization, marine generators exit, shore power transformer begins to supply power; in the case of normal circulation current, the gate can get computer time signals and the circulation current detection data signals at the same time , GTO conducting, L reactor shorted, and shore power transformer suppling power directly.
Online since: October 2006
Authors: Wolfgang Windl, Wilfried Lerch, Peter Pichler, Alexander Burenkov, Jürgen Lorenz, Silke Paul, Jürgen Niess, Jeffrey C. Gelpey, Steve McCoy, Luis Felipe Giles, Zsolt Nényei
This rate of size
reduction is somewhat lower than it was temporarily before 2000, where the dimensions were
reduced by a factor of 0.7 every two years.
This paper will describe a pragmatic model developed for boron implanted into crystalline silicon which is able to reproduce experimental data in a wide range of annealing conditions.
Fig. 16: Sheet resistivity versus junction depth as a function of hot-shield anneal temperature (shown as numbers besides the data points) and implant dose.
Fig. 18: Comparison of the simulation of an fRTP step with a peak temperature of 1270 ◦C to experimental data.
Fig. 19: Comparison of the simulation of an fRTP step with a peak temperature of 1340 ◦C to experimental data.
This paper will describe a pragmatic model developed for boron implanted into crystalline silicon which is able to reproduce experimental data in a wide range of annealing conditions.
Fig. 16: Sheet resistivity versus junction depth as a function of hot-shield anneal temperature (shown as numbers besides the data points) and implant dose.
Fig. 18: Comparison of the simulation of an fRTP step with a peak temperature of 1270 ◦C to experimental data.
Fig. 19: Comparison of the simulation of an fRTP step with a peak temperature of 1340 ◦C to experimental data.
Online since: June 2014
Authors: Yung Jaan Lee, Shih Chien Lin
Above data demonstrates that Taiwan is among the leading contributors to carbon dioxide emissions worldwide.
Therefore, based on existing consumption expenditure surveys, many consumption-based carbon footprint studies analyze household GHG footprint and also track consumer’s expenditure related GHG life cycle analysis by using the national data from "input-output life cycle analysis" (Chavez & Ramaswami, 2013; Jones & Kammen, 2011).
However, only the national carbon dioxide emissions data is used, which lacks the carbon dioxide emissions statistics of each county and city.
However, without relevant legislation, Taiwan’s Environmental Protection Administration has devised only a national GHG registration platform, which provides GHG emissions for organizations that declare such data voluntarily.
Sweden: Stockholm. (2013) [14] Jones, C.M. & Kammen, D.M..in: Quantifying carbon footprint reduction opportunities for U.S. households and communities.
Therefore, based on existing consumption expenditure surveys, many consumption-based carbon footprint studies analyze household GHG footprint and also track consumer’s expenditure related GHG life cycle analysis by using the national data from "input-output life cycle analysis" (Chavez & Ramaswami, 2013; Jones & Kammen, 2011).
However, only the national carbon dioxide emissions data is used, which lacks the carbon dioxide emissions statistics of each county and city.
However, without relevant legislation, Taiwan’s Environmental Protection Administration has devised only a national GHG registration platform, which provides GHG emissions for organizations that declare such data voluntarily.
Sweden: Stockholm. (2013) [14] Jones, C.M. & Kammen, D.M..in: Quantifying carbon footprint reduction opportunities for U.S. households and communities.
Online since: March 2013
Authors: Yi Zhang, Jiang He
Based on analysis results of measurement data, comfortable thermal environments for arcaded pedestrian paces in the pedestrian streets of the Lingnan region were understood.
A round of field data measurement for five measurement points was required to be completed within one hour.
As can be seen from Fig. 6, points A3 and A5 each have two data where the globe temperature is higher than the air temperature.
It is discerned from the original recorded data that, these two abnormal data of point A3 were measured at 12:30 and 14:30 respectively.
It is thus clear that the abnormal data of points A3 and A5 are related to intense solar radiation at noon.
A round of field data measurement for five measurement points was required to be completed within one hour.
As can be seen from Fig. 6, points A3 and A5 each have two data where the globe temperature is higher than the air temperature.
It is discerned from the original recorded data that, these two abnormal data of point A3 were measured at 12:30 and 14:30 respectively.
It is thus clear that the abnormal data of points A3 and A5 are related to intense solar radiation at noon.
Online since: March 2008
Authors: Yvan Houbaert, Fernando González, Daniel Ruiz
The reduction of
the peaks during the ageing after annealing is more noticeable in quenched specimens than in air
cooled ones, and in furnace cooled specimens the reduction is even smaller, indicating that the
process is really an ageing phenomenon.
The low frequency Z-peak height is not measured in the case of the FeSi-7 sample because the frequency at which the maximum is reached is not a reliable data.
The low frequency Z-peak height is not measured in the case of the FeSi-7 sample because the frequency at which the maximum is reached is not a reliable data.
Online since: May 2014
Authors: Wei Li Yu
CNC machining based on application integration and cloud service platform
NC machining based on application integration and cloud service platform is through the cloud computing technology to realize the software, computing, knowledge organization, management and sharing of resources, through the Internet of things and embedded technology realize a physical device such as automatic access, management, monitoring and sharing, and through the virtualization and service-oriented technology standard, for all kinds of CNC manufacture resource, manufacturing capabilities, manufacturing knowledge for automatic configuration and deployment of cloud, construct an autonomous, self-maintenance, dynamic extension system of NC manufacturing service cloud, and with the support of high performance computing technology, to realize automatic NC manufacture of cloud services rent-seeking, intelligent matching, cost optimization, intelligent settlement and payment, data security management, through the task
The purpose of NC machining based on application integration and cloud service platform is the implementation based on knowledge of CNC manufacturing resources and manufacturing capabilities, manufacturing knowledge sharing and according to the need to use, so as to improve the utilization of NC manufacturing resources, implement modern enterprise listed with the fastest speed, best quality, lowest cost, best service, the most clean environment, better flexibility and high knowledge content to meet different customer demand for products and social requirement) goal of sustainable development, promote energy conservation and emissions reduction, realize green and low carbon manufacturing.
With all sorts of NC machine application, if there is no uniform data model or specification, it is difficult to integrate them in a big flat.
The platform is divided into management, application integration layer and base data layer three parts.
Among them, the application of the management is responsible for user management, system management, management of cloud services, data management and cloud service release management, etc., it can be integrated into a larger cloud manufacturing platform, can also operate independently; Basic data layer including CNC machining equipment, cutting tools, software, fundamental data such as manufacturing capability and technology, and knowledge, is provided by the resource provider, application tools developer; Application integration layer is composed of data interface platform and service integration application tool, is responsible for distribution in different locations of the manufacturing resources and integrate the application tools provided by different organizations to provide process design, CNC programming and integration of various kinds of NC machining process related services.
The purpose of NC machining based on application integration and cloud service platform is the implementation based on knowledge of CNC manufacturing resources and manufacturing capabilities, manufacturing knowledge sharing and according to the need to use, so as to improve the utilization of NC manufacturing resources, implement modern enterprise listed with the fastest speed, best quality, lowest cost, best service, the most clean environment, better flexibility and high knowledge content to meet different customer demand for products and social requirement) goal of sustainable development, promote energy conservation and emissions reduction, realize green and low carbon manufacturing.
With all sorts of NC machine application, if there is no uniform data model or specification, it is difficult to integrate them in a big flat.
The platform is divided into management, application integration layer and base data layer three parts.
Among them, the application of the management is responsible for user management, system management, management of cloud services, data management and cloud service release management, etc., it can be integrated into a larger cloud manufacturing platform, can also operate independently; Basic data layer including CNC machining equipment, cutting tools, software, fundamental data such as manufacturing capability and technology, and knowledge, is provided by the resource provider, application tools developer; Application integration layer is composed of data interface platform and service integration application tool, is responsible for distribution in different locations of the manufacturing resources and integrate the application tools provided by different organizations to provide process design, CNC programming and integration of various kinds of NC machining process related services.
Online since: July 2014
Authors: Chen Miao, Bing Quan Sun, Li Wang, Da Wei Zhang
The results showed that the alkaline oxidation-reduction potential of water each age concrete carbonation resistance are greatly improved, 28d carbonation depth is reduced by approximately 21%.
Fig.2 APW concrete carbonation interface Fig.1 Regular concrete section carbonation interface Non-destructive testing of concrete carbonation depth GBJ 82-85 specification elongated prism specimens (small cubic specimens or more), the following disadvantages in the test procedure: 1) Nearby concrete structure (pore diameter, porosity, etc.) is different at different splitting, the lack of homogeneity and therefore the test data, test data at different times lack of continuity. 2) Rough split surface, resulting in uneven color reagent is difficult to determine the boundaries 3) Limited number of samples, is not conducive to the establishment and testing carbonation model.
Carbonation test data in Table 4.
Tab.4 Nondestructive way of test data Carbonation time /d 20 30 40 50 Carbonation depth /mm 12.3 14.2 15.5 16.9 Carbonation time /d 60 70 80 90 Carbonation depth /mm 18.2 19.3 21.8 22.6 According to experimental data in Table 4 can be obtained by regression carbonation equation: Xt = 3.53t0.407
Nondestructive carbide carbide specimens may continue to the next instar (or more) to obtain new data, re-carbonation correction equation that prediction accuracy achieved.
Fig.2 APW concrete carbonation interface Fig.1 Regular concrete section carbonation interface Non-destructive testing of concrete carbonation depth GBJ 82-85 specification elongated prism specimens (small cubic specimens or more), the following disadvantages in the test procedure: 1) Nearby concrete structure (pore diameter, porosity, etc.) is different at different splitting, the lack of homogeneity and therefore the test data, test data at different times lack of continuity. 2) Rough split surface, resulting in uneven color reagent is difficult to determine the boundaries 3) Limited number of samples, is not conducive to the establishment and testing carbonation model.
Carbonation test data in Table 4.
Tab.4 Nondestructive way of test data Carbonation time /d 20 30 40 50 Carbonation depth /mm 12.3 14.2 15.5 16.9 Carbonation time /d 60 70 80 90 Carbonation depth /mm 18.2 19.3 21.8 22.6 According to experimental data in Table 4 can be obtained by regression carbonation equation: Xt = 3.53t0.407
Nondestructive carbide carbide specimens may continue to the next instar (or more) to obtain new data, re-carbonation correction equation that prediction accuracy achieved.
Online since: March 2014
Authors: Oyun Erdene Byambasuren, Feng Hua Bai, Yin Xia Zhang, Hai Quan Su
Heterogeneous catalysts derived from transition metal clusters have demonstrated improved activity and selectivity over transition-metal only catalysts in important catalytic processes, such as the reduction of nitrogen oxides, vapor-phase hydrogenation of phenol, and CO hydrogenation [3, 4].
Crystal data were collected on a BRUKER SMART 1000 CCD detector.
Crystallographic data and experimental details for structural analyses are summarized in Table 1.
Table 1 Crystal data and structure refinement for 1 Empirical formula Formula weight T/K λ/ Å Crystal system Space group a, b, c/Å α, β, γ/° V/ Å3 Z DCalcud (Mg/m3) μ/mm-1 F(000) θ range/° R(int) Data/restraints/ parameters R1 [I>2σ (I)] wR2[I>2σ (I)] R1 (all data) wR2(all data) Goodness-of-fit on F2 Δρmax, min /e·Å-3 Ce4Yb2(μ3-L)4(CF3COO)8(DMF)6Co1 3932.07 298(2) 0.71073 Monoclinic C2/c 21.368(3), 19.996(2), 29.487(3) 90.0000, 102.805(2), 90.0000 12286(2) 4 2.126 4.265 2516 2.726 to 25.326 7484 4266 / 0 / 944 0.0706 0.1944 0.1190 0.2201 1.066 3.443 and -1.954 Table 2 Selected bond lengths /Å for 1 Yb1 O30 2.299(15) Yb1 O21 2.300(12) Yb1 O26 2.305(11) Yb1 O14 2.317(9) Yb1 O29 2.322(10) Yb1 O28 2.324(12) Yb1 O3 2.386(8) Ce1 O22 2.066(15) Ce2 O25 2.135(14) Ce1 O23 2.084(12) Ce1 O31 2.142(14) Ce1 O29 2.179
[9] G.M.Sheldrick, SADABA, Program for Empirical Absorption Correction of Area Detector Data; University of Göttingen, Göttingen, Germany, 1996. 246
Crystal data were collected on a BRUKER SMART 1000 CCD detector.
Crystallographic data and experimental details for structural analyses are summarized in Table 1.
Table 1 Crystal data and structure refinement for 1 Empirical formula Formula weight T/K λ/ Å Crystal system Space group a, b, c/Å α, β, γ/° V/ Å3 Z DCalcud (Mg/m3) μ/mm-1 F(000) θ range/° R(int) Data/restraints/ parameters R1 [I>2σ (I)] wR2[I>2σ (I)] R1 (all data) wR2(all data) Goodness-of-fit on F2 Δρmax, min /e·Å-3 Ce4Yb2(μ3-L)4(CF3COO)8(DMF)6Co1 3932.07 298(2) 0.71073 Monoclinic C2/c 21.368(3), 19.996(2), 29.487(3) 90.0000, 102.805(2), 90.0000 12286(2) 4 2.126 4.265 2516 2.726 to 25.326 7484 4266 / 0 / 944 0.0706 0.1944 0.1190 0.2201 1.066 3.443 and -1.954 Table 2 Selected bond lengths /Å for 1 Yb1 O30 2.299(15) Yb1 O21 2.300(12) Yb1 O26 2.305(11) Yb1 O14 2.317(9) Yb1 O29 2.322(10) Yb1 O28 2.324(12) Yb1 O3 2.386(8) Ce1 O22 2.066(15) Ce2 O25 2.135(14) Ce1 O23 2.084(12) Ce1 O31 2.142(14) Ce1 O29 2.179
[9] G.M.Sheldrick, SADABA, Program for Empirical Absorption Correction of Area Detector Data; University of Göttingen, Göttingen, Germany, 1996. 246