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Online since: July 2014
Authors: Guang Hui Zhou, An Gui Li, Xu Ge Li, Jie Chen, Tong Chen, Hai Jun Li
It can be seen from the above data, when the ambient temperature was below 10˚C, the compressor discharge temperature will exceed the allowed 120˚C in normal heat pump circulation system for pure electric vehicle, so the system cannot run normally.
It can be seen from the figure, the compressor discharge temperature lower with the reduction of the outside temperature under different condensing temperatures.
The evaporation pressure of external heat exchanger decreases with the reduction of ambient temperature, so it cause a reduction of the compressor suction pressure, the refrigerants specific volume increase. when the outside ambient temperature decreased from 10˚C to -15˚C, the heating capacity of the gas-mixing HPACS is reduced by 50%. the heating capacity slightly down with the rise of the condensing temperature, as the rise of condensing temperatures causes evaporating temperature of outside heat exchanger rising, the refrigerants specific volume increase, refrigerant mass flow lower.
It can be seen from the figure, the compressor discharge temperature lower with the reduction of the outside temperature under different condensing temperatures.
The evaporation pressure of external heat exchanger decreases with the reduction of ambient temperature, so it cause a reduction of the compressor suction pressure, the refrigerants specific volume increase. when the outside ambient temperature decreased from 10˚C to -15˚C, the heating capacity of the gas-mixing HPACS is reduced by 50%. the heating capacity slightly down with the rise of the condensing temperature, as the rise of condensing temperatures causes evaporating temperature of outside heat exchanger rising, the refrigerants specific volume increase, refrigerant mass flow lower.
Online since: December 2014
Authors: Qing Xu, Chun Ming Jiao, Si Li Yi, Gang Ming Zhou
The 1H NMR spectral data of synthesized samples were recorded on a Bruker ACF 300 spectrometer operating at 400 MHz for 1H nucleus, using CDCl3 solvent and TMS as internal standard, respectively.
Two clear quasi reversible one electron reduction waves could be found, which can be attributed to the reduction of the perylenediimide moiety and exhibited the good electron acceptor ability of these materials.
PDI-TPA showed the ambipolar behavior, the onset potential for reduction and oxidation occurred at -0.80 V and 0.90 V, the LUMO and HOMO levels were calculated as -3.60 eV and -5.30 eV, respectively.
Two clear quasi reversible one electron reduction waves could be found, which can be attributed to the reduction of the perylenediimide moiety and exhibited the good electron acceptor ability of these materials.
PDI-TPA showed the ambipolar behavior, the onset potential for reduction and oxidation occurred at -0.80 V and 0.90 V, the LUMO and HOMO levels were calculated as -3.60 eV and -5.30 eV, respectively.
Online since: July 2013
Authors: Dong Hui Wang, Wen Xiang Liu, Shao Wei Yong
Unfortunately, the improvement of antenna gain will result in antenna coverage radius reduction and coverage performance deterioration.
Effect of antenna gain increment on single satellite coverage radius Antenna gain increment results in the reduction of antenna beam width.
(3) From equation (1), (2) and (3), we have: (4) The equation expressed as dB is as follows: (5) From equation (5), the relationship between antenna gain increment and antenna beam width reduction can be got.
The constellation orbit data is from July 1 2008 12:00 to July 5 2008 12:00, and time interval is 10 minutes.
Effect of antenna gain increment on single satellite coverage radius Antenna gain increment results in the reduction of antenna beam width.
(3) From equation (1), (2) and (3), we have: (4) The equation expressed as dB is as follows: (5) From equation (5), the relationship between antenna gain increment and antenna beam width reduction can be got.
The constellation orbit data is from July 1 2008 12:00 to July 5 2008 12:00, and time interval is 10 minutes.
Online since: September 2013
Authors: Abdul Aziz Abdul Samad, W.I. Goh, N. Mohamad, S. Samsuddin, I. Ahmad, M.H.A. Rahman
This report provides experimental data on the development of PLFP for building construction.
Test results were compared with calculated values based on classical formulas that developed by previous researchers and experimental data from previous researchers on its compositeness in between wythes.
Furthermore, lower density in foamed concrete leads to the reduction in structure’s self-weight and total supported loading needs.
Test results were compared with calculated values based on classical formulas that developed by previous researchers and experimental data from previous researchers on its compositeness in between wythes.
Furthermore, lower density in foamed concrete leads to the reduction in structure’s self-weight and total supported loading needs.
Online since: February 2019
Authors: M.L. Davydova, M.D. Sokolova, A.R. Haldeeva
Analysis of the data revealed that the obtained rubber has excellent frost resistance, increased oil resistance at a satisfactory level of residual deformation after compression and strength characteristics.
The deviation of GMRG indicators from the requirements above may lead to a reduction in tightness, brittle failure of the seal, a reduction in strength, destruction (tearing) of the sealing edges of the movable seals at the moment of friction, destruction of the polymer and elastomer, and a reduction in mechanical properties [4].
The deviation of GMRG indicators from the requirements above may lead to a reduction in tightness, brittle failure of the seal, a reduction in strength, destruction (tearing) of the sealing edges of the movable seals at the moment of friction, destruction of the polymer and elastomer, and a reduction in mechanical properties [4].
Online since: November 2011
Authors: Yu Bing Li
In Fig.2, the comparison of traditional product development and concurrent engineering product development shows the marked reduction of development time.
The PDT collects and analyzes benchmark data to formalize characteristics matrix from customer requirements.
Due to the reduction of product design cycle and the reduction of cost, one of product development trends is modular design.
Fig .7 Bumper system design workflow Technical 3D data 2D drawing Maintenance & recycling design Material use report Assembly/dismantling manual Design output material process overheads Cost model Strength &stiffness Material properties topology rib hole design thickness optimization Tolerance scheme Surface quality Tooling process Material properties(shrinkage, spring back) Process design Formation limitation Filling analysis Gate solution Process parameters Part thickness Material design Geometry design Process design Preliminary design Structure deign Connection design Local optimization Detail design Styling strategy Trend fashion Customer Requiement Concept design Class A release System/component function Load, formation aging、temperature UV stability Chemical resistance Flammability etc.
The PDT collects and analyzes benchmark data to formalize characteristics matrix from customer requirements.
Due to the reduction of product design cycle and the reduction of cost, one of product development trends is modular design.
Fig .7 Bumper system design workflow Technical 3D data 2D drawing Maintenance & recycling design Material use report Assembly/dismantling manual Design output material process overheads Cost model Strength &stiffness Material properties topology rib hole design thickness optimization Tolerance scheme Surface quality Tooling process Material properties(shrinkage, spring back) Process design Formation limitation Filling analysis Gate solution Process parameters Part thickness Material design Geometry design Process design Preliminary design Structure deign Connection design Local optimization Detail design Styling strategy Trend fashion Customer Requiement Concept design Class A release System/component function Load, formation aging、temperature UV stability Chemical resistance Flammability etc.
Online since: November 2013
Authors: Shan Shan Cao, Jun Qing Lei, Kun Zhang
Some research shows that probability reliability is sensitive to probability model parameters, and tiny error probability data can lead to a larger structural reliability calculation error.
Non-probabilistic reliability theory.In aerospace and mechanical areas, statistical data are also not enough.Some scholars describe the uncertain parameters of structureswith interval model or convex set model, and define a non-probabilistic reliability metrics to measure the reliability of structures.
And the reductions decreases with increasing off.
Firstly, with the increase of the variation coefficient fof σS, the reductions of reliability index of cables are the largest.
(3)With the increase of the variation coefficient fofσS, the reductions of reliability index of cables are the largest.
Non-probabilistic reliability theory.In aerospace and mechanical areas, statistical data are also not enough.Some scholars describe the uncertain parameters of structureswith interval model or convex set model, and define a non-probabilistic reliability metrics to measure the reliability of structures.
And the reductions decreases with increasing off.
Firstly, with the increase of the variation coefficient fof σS, the reductions of reliability index of cables are the largest.
(3)With the increase of the variation coefficient fofσS, the reductions of reliability index of cables are the largest.
Online since: January 2022
Authors: R. Sridhar, R. Ravi Kumar, H.C. Guruprasad
Present investigation is to estimate reduced CO2 emission due to reduction in cement utilization by GGBSCC [5].
It was seen that the compressive strength increased up to 9% addition of Alccofines but there was small reduction for 12 % addition of Alccofines for 50, 60 and 70% replacement by GGBS for a curing period of 28 days.
· This results in approximately 146.4 million tons reduction of CO2 emission by cement industries in India
· As per obtained data, a truck of 10 wheels (3 axles) carries 19 tons of cement
· From the data obtained by Environmental Protection Agency (EPA) USA, 1 liter combustion of Diesel by trucks emits 2.66 kg of CO2.
It was seen that the compressive strength increased up to 9% addition of Alccofines but there was small reduction for 12 % addition of Alccofines for 50, 60 and 70% replacement by GGBS for a curing period of 28 days.
· This results in approximately 146.4 million tons reduction of CO2 emission by cement industries in India
· As per obtained data, a truck of 10 wheels (3 axles) carries 19 tons of cement
· From the data obtained by Environmental Protection Agency (EPA) USA, 1 liter combustion of Diesel by trucks emits 2.66 kg of CO2.
Online since: September 2008
Authors: Norio Shinya
Figure 4 shows the comparison between calculated sintering curves and
experimental annealing data.
In B, Ce-added steel, most of the nucleated cavity surfaces were covered with Figure 4 Comparison between calculated sintering rates and experimental data of annealing for creep cavities induced in 1.3Mn-0.5Mo-0.5Ni steel. 4 Stress (a) 98MPa, tr=152.7h (b) 98MPa, tr=445.6h 347 347BCe Figure 5 Creep cavities formed during creep at 750 ℃ in standard (347) and modified 347 (347BCe) steels.
The suppression of creep cavitation in the B, Ce-added steel was observed, and this is thought to be caused by the reduction of the diffusivity with the segregation of B on the cavity surface.
Figure 7 Creep cavity growth rate and creep strain with creep exposure time in Ar at 750℃ and 78MPa. 300 500 12 10 8 6 4 2 0Cavity growth rate (μm/h) Strain (%) Time (h) ■□ 347 ●○ 347BCe 300 500 12 10 8 6 4 2 0Cavity growth rate (μm/h) Strain (%) Time (h) ■□ 347 ●○ 347BCe Figure 8 Creep rupture properties at 750℃ for standard 347 and modified 347 (347BCe) steels 40 50 60 70 80 90 100 Applied stress (MPa) 120 0 10 20 30 40 50 Elongation (%) 101 102 103 104 105 0 10 20 30 40 50 Tim e to rupture (h) Reduction in area (%) ■ 347 ● 347BCe 40 50 60 70 80 90 100 Applied stress (MPa) 120 0 10 20 30 40 50 Elongation (%) 101 102 103 104 105 0 10 20 30 40 50 Tim e to rupture (h) Reduction in area (%) ■ 347 ● 347BCe 5 Figure 9 Scanning electron micrographs showing creep cavities, exposed by breaking at liquid nitrogen temperature under impact loading, of standard
In B, Ce-added steel, most of the nucleated cavity surfaces were covered with Figure 4 Comparison between calculated sintering rates and experimental data of annealing for creep cavities induced in 1.3Mn-0.5Mo-0.5Ni steel. 4 Stress (a) 98MPa, tr=152.7h (b) 98MPa, tr=445.6h 347 347BCe Figure 5 Creep cavities formed during creep at 750 ℃ in standard (347) and modified 347 (347BCe) steels.
The suppression of creep cavitation in the B, Ce-added steel was observed, and this is thought to be caused by the reduction of the diffusivity with the segregation of B on the cavity surface.
Figure 7 Creep cavity growth rate and creep strain with creep exposure time in Ar at 750℃ and 78MPa. 300 500 12 10 8 6 4 2 0Cavity growth rate (μm/h) Strain (%) Time (h) ■□ 347 ●○ 347BCe 300 500 12 10 8 6 4 2 0Cavity growth rate (μm/h) Strain (%) Time (h) ■□ 347 ●○ 347BCe Figure 8 Creep rupture properties at 750℃ for standard 347 and modified 347 (347BCe) steels 40 50 60 70 80 90 100 Applied stress (MPa) 120 0 10 20 30 40 50 Elongation (%) 101 102 103 104 105 0 10 20 30 40 50 Tim e to rupture (h) Reduction in area (%) ■ 347 ● 347BCe 40 50 60 70 80 90 100 Applied stress (MPa) 120 0 10 20 30 40 50 Elongation (%) 101 102 103 104 105 0 10 20 30 40 50 Tim e to rupture (h) Reduction in area (%) ■ 347 ● 347BCe 5 Figure 9 Scanning electron micrographs showing creep cavities, exposed by breaking at liquid nitrogen temperature under impact loading, of standard
Online since: October 2017
Authors: Piyachat Chuysinuan, Patcharakamon Nooeaid, Supanna Techasakul, Kriengsak Lirdprapamongkol, Jisnuson Svasti
Viable cells were then determined indirectly by MTT dye reduction.
The data were reported as the mean ± the standard derivation (SD).
A one-way ANOVA was used to compare the means of different data sets and significance was accepted at the 0.05 confidence level.
The reduction of the mechanical properties of the scaffolds with an increase in SPI content can be explained by the microstructure change seen in Fig. 1.
The inhomogeneity of the porous structure in scaffolds of 60/40 Alg/SPI resulted in a lack of structural integrity, and subsequently, reduction of compressive modulus and strength.
The data were reported as the mean ± the standard derivation (SD).
A one-way ANOVA was used to compare the means of different data sets and significance was accepted at the 0.05 confidence level.
The reduction of the mechanical properties of the scaffolds with an increase in SPI content can be explained by the microstructure change seen in Fig. 1.
The inhomogeneity of the porous structure in scaffolds of 60/40 Alg/SPI resulted in a lack of structural integrity, and subsequently, reduction of compressive modulus and strength.