Materials Literature
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In order to detect the length and root number of yarn hairiness more accurately,a new hairiness detection method was proposed based on video microscope in combination with image processing techniques.The yarn images were captured with a MOTIC SME-140 video microscope and then were processed with gray scale conversion,…
Capillary electrophoresis (CE) is an interesting technique for protein and peptide analysis. However, one of the major problems concerns sample adsorption on the internal capillary wall. The use of non-covalent coatings using highly charged polyelectrolytes is an efficient, simple, and fast approach to reduce peptide…
Polyimide(PI) film is an important type of insulating material used in the inverter-fed motors.Partial discharge(PD) under a sequence of high-frequency square impulses is one of the key factors which lead to premature failure of insulation systems of inverter-fed motors.In order to explore the damage mechanism of PI f…
Impacts of pH on biological phosphorus removal(BPR) at low temperature were investigated in SBR reactors and batch experiments operated at 5 ℃.It was proved that pH affected not only the performance,but also the microbial community structure of BPR system.Acidic condition of pH 6 favored the accumulation of glycogen a…
To analyze shape control behavior of 20-h Sendzimir mill,a special simulation model and software system integrated by roll system and strip were established and developed.In this paper,both rolls and strip deformation behavior of a Sendzimir mill for rolling silicon steel and stainless steel were simulated.A series of…
As one kind of cement-based materials with high strength,high ductility,low porosity and good durability,ultra high performance concrete(UHPC) has gained extensive attention.This paper studied the influence of UHPC constituents on its fluidity and strength development.Results show that the waterto-binder ratio(w/b) is…
The mechanism to improve the abrasion resistance of concrete by adding silica fume was studied by Fourier transform infrared spectroscopy, high resolution 29Si MAS NMR with deconvolution technique, respectively. The results of FTIR and 29Si MAS NMR indicated that SF possesses a high pozzolanic reactivity. About 41% of…
Phenylethanoid glycosides(PhGs) are widely distributed in medicinal kingdom of plants.These compounds possess broad biological activities,lower toxicity and good safety,which provide great potentials in pharmaceutical applications.It will be the first occasion to review the progress of antioxidation,free radical scave…
The non-metallic inclusions which can create surface defects of the cold rolled sheets mainly are the large sized Al2O3clusters,Ar+Al2O3typed inclusions and the entrapped mold powder particles.Nowadays,under normal and stable casting conditions,the inclusions formed due to the mold powder entrapment can be well contro…
Applying fiber Bragg grating(FBG) to monitor composite insulators status online has become an effective monitor technique.In order to obtain the relationship between the stress change of the insulator and the center wavelength of FBG in composite rods,we simulated fault conditions such as the rod breakdown,umbrella sk…
In order to obtain the far-field characteristics of corona-discharge-induced radiation signal(CDRS)from ultra high voltage(UHV)transmission lines and air targets in natural environments,we experimentally investigated the radiation,and established a test system using the narrowband test principle.Field experiments indi…
The hot deformation behavior of 22MnB5 steel was investigated through tension testing on a Gleeble-3500 thermal-mechanical simulator, over a range of temperature from 700 ℃ to 900 ℃ and a range of strain rate from0.01 s–1to 10 s–1. It is found that failure strain of the steel increases with the increase of strain rate…
An analytic algorithm to estimate the tensile modulus of disk impact splitting test was presented.Combined the theoretical elastic solution of disk on cardiac force and the physical parameters obtained in actual measure of experiments,and based on the principle of calculus,the quantitative relationship between tensile…
We investigated the insulation properties of different CF3I-N2 and CF3I-CO2 mixtures for further analyzing the possibility of applying these mixtures as substitutes for SF6 in high voltage apparatuses.Firstly,we calculated the reduced ionization coefficient α/N,the reduced attachment coefficient η/N and the reduced ef…
This part is the second section of the whole article.It introduces the application situation of aluminum product for national and international airplanes.The aluminum product used for Chinese ARJ21-700 passenger plane and foreign airplane such as air bus A380,Boeing B777 and EH-101 airplane have been listed particular…
Regenerated MgO–CaO brick samples with MgO contents of 80%, 70% and 60%, respectively, were prepared with spent MgO–CaO bricks for AOD furnace and fused magnesite as raw materials at 1 873 K for 2 h. The phase composition, microstructure,mechanical property and the hydration resistance of the recycled samples at vario…
The energy of explosion of aluminized explosive with different particle size in different explosion atmosphere was measured by an isothermal calorimeter,and the influence rules of Al powder granularity and explosion atmosphere on the energy of explosion of aluminized explosive were analyzed.The results show that the e…
To investigate the very fast transient over-voltage(VFTO) generated by disconnector in gas insulated switchgear(GIS) switching on/off short buses with no load,we developed a system for measuring VFTO,very fast transient current(VFTC),and gap distance,as well as a 252 kV GIS experimental circuit for testing the system.…
Studying the state of hydrophobicity and its influential factors of different areas of a composite insulator is of guiding significance for hydrophobicity tests and discrimination of the whole insulator.Thus,we selected four series of silicone rubber composite insulators in service to perform hydrophobicity tests on t…
Partial discharge(PD) is the main reason for the deterioration of the power transformer insulation.Partial discharge location is helpful to improve the safe operation of power grid.A combined sensor is designed to locate PD in transformer,and based on the sensor PD location simulation and experiments are made in this…