Search results

Introduction Vanadium is a rare transition metal, which can refine crystal grain and improve the toughness, hardness and mechanical strength of steel, and 85% to 90% of the vanadium is mixed in steel as the alloy braced for steel-making.
With the substantial growth of Chinese steel production, a large number of slag containing vanadium is let out every year in Panzhihua of Sichuan, Maanshan of Anhui and Chengde of Hebei[2].
When pH of reaction liquid maintained at about 8, according to the law of mass action, number of CO32- ions are present, which is apt to the positive reaction.

The Finite Element Analysis of Coupling Law of Stress Field / Seepage Field in Impermeable Stratum Medium Jingyan Li Institute of Marine Geosciences,Ocean University of China Number 238, SongLing Road, LaoShan District, Qingdao City of Shandong, China , 266100 zzjhym@sina.com Key words: Porous medium; Seepage field; Stress field; Coupling Law; Mathematical model; Numerical simulation; finite element.
Seepage theory and application about fluid flow of deformable saturated reservoir, non-miscible two-phase seepage saturated, seepage of fractured rock, fractured gas reservoirof low permeability, reservoir after fracturing, ground water, natural gas and coal reservoirs, low permeability reservoir, flow-solid-heat three coupled etc have been studied and examples simulated respectively by domestic scholars ,at the same time a number of interesting conclusions and understanding have been got.
Mathematical model of rock stratum skeleton 2.1 Equation of continuity （1） In it: - Media density of dry porous；-Velocity of the solid skeleton； Let the density of solid particles-；so, （2） To the clastic reservoir rocks such as sandstone,because its main component are hard and compact quartz, feldspar grains, rock particle density can be set the same , that ρs = constant,so （3） Using the the relationship between material derivative and spatial derivatives,then (3) becomes （4） According to In the small deformation theory of solid mechanics, it assumes that material derivative is approximately

This is due to the carbon content of Ni25 alloy is low and chromium-free, so the melting point second phase particles is less during solidification, the effect to prevent grain growth is also weak.
Therefore its cladding microstructure is coarse and dendrite is clear.Melting point of Ni60 alloy is low, the coagulation time is longer, the chromium content is less than Ni21,the number of high melting point compounds is relatively less during solidification,so its cladding microstructure is more thicker than that of Ni21 +20% WC +0.5% CeO2.
Figure 2 is a contrast histogram of high-temperature dry friction and wear ofcladding layer with different composition under the same experimental conditions.As can be seen from the figure, the wear of Ni21 +20% WC +0.5% CeO2 cladding layer is minimal, Its wear resistance is best,and wear resistance of Ni60 +20% WC +0.5% CeO2 cladding layer is worst.This is closely related to the level of cladding layer hardness, uniform and dense of the microstructure, High and low of the melting point.The microstructure of Ni60 +20% WC +0.5% CeO2 cladding layer is dense and small, the number of hard particles of precipitates is more,The hardness of the hard particles is high and fall flat with the temperature drop,so its high-temperature wear resistance is the best. 1.Ni60 +20% WC +0.5% CeO2 2.

The texture coefficient TC(hkl) is calculated for the characteristic diffraction planes from the X-ray diffraction data using the well known formula [18] TC(hkl) = (I(hkl)/Io(hkl))/((1/N)∑(I(hkl)/Io(hkl))) where I(hkl) indicates the X-ray diffraction intensity obtained from the films and N is the number of reflections observed in the XRD pattern.
The value of the texture coefficient indicates the maximum preferred orientation of the films along the diffraction plane, meaning that the increase in preferred orientation is as sociated with increase in the number of grains along that plane.

The advantage of SOA SOA is loosely coupled, coarse-grained services architecture, by defining a neutral interface for communication between services, has the following advantages: (1)Reduce complexity SOA architecture through loosely and coupled relationship between service requester and provider, shielding the complex business logic of the system.
In order to reduce the amount of read data of AIS next time, the data acquired last time will not be read, it can add a parameter maxim, as well as biggest records number ID had read currently, in AIS database, next time they just take data greater than the current maxim.
Returns the object AIS information services in addition to the largest number of maxid and AIS object group record the current AIS database, including AIS data object each return need ship MMSI longitude, latitude, azimuth angle, lonth breadth, time of occurrence attribute, return structure of AIS information services in Web based on Service XML SOAP forms can be designed as in figure 5.

The wires have shown higher grain-connectivity, better mechanical properties, and good anti-ballooning property against liquid coolant such as pressurized liquid nitrogen [7].
Component Specification Rated power 1-kW Rotor diameter 1.5 m Blade length 1.5 m Number of blade 3 Swept area 2.25 m2 Tower 3 m, free-stand Cut-in speed 3 m/s Rated speed 7 m/s DI-BSCCO superconducting coils Type H, double pancake of 100 turns Table 1 shows the components and specifications of various components and parameters based on the proposed design.
Acknowledgement This project is supported by the Ministry of Science, Technology and Innovation, Malaysia under Science Fund grant number 03-02-03-SF0232.

Organization of the Text One-dimensional consolidation equation due to dissipation of pore air pressure Hypotheses are following: (1) only air can flow through the pore and the infiltration of pore water can be neglected; (2) pore air is perfect gas, and it is isothermal process; (3) both pore water and pore air would not transform to each other; (4) the deformation is small and the soil skeleton is linear elastic; (5) both soil grain and pore water are uncompressible; (6) soil is homogeneous, and the coefficient of compressibility and the coefficient of infiltration of pore air are constant.
Supposing the space step length is Δz, the time step length is Δt, the number of time node is i (i=0,1,2,…), the number of space node is j (j=0,1,2,…,n), the equation can be transferred as (8) Where, Δz=2H/n.

(RBS) tsub, [°C] Number of pulses Rep. rate, [Hz] Pulse energy, [mJ] RBS (± 10) SE (± 10) TEM (± 5) 1 Si(100) 30 50 000 30 100 240 245 - 4,9 Si1,0C0,95 2 Si(100) 300 50 000 30 100 240 244 - 4,8 Si1,0C0,95 3 Si(100) 500 50 000 30 100 260 262 - 5,2 Si1,0C0,97 4 Si(100) 700 50 000 30 100 230 232 180 4,6 Si1,0C0,97 5 Si(100) 950 10 000 45 100 - 37 45 4,1 - 6 Si(111) 30 30 000 45 150 - 246 - 8,2 - 7 Si(111) 500 30 000 45 150 - 253 - 8,4 - 8 Si(111) 600 30 000 45 150 - 208 - 6,9 - 9 Si(111) 700 30 000 45 150 - 191 - 6,3 - 10 Si(111) 950 20 000 45 100 74 73 70 3,6 Si1,0C1,0 Taking into account low growth temperature of the samples it can be assumed that the main cause of the deviation from stoichiometry is self-sputtering: some fraction of the ablated material impacting the surface induces a desorption process.
It is known that physical sputtering yield factor depends on the atomic number and cohesive energy of the target elements [8], which may lead to preferential removal (preferential sputtering) of some component from compound semiconductor surfaces [9].
Fig. 2c illustrates Si/SiC heteroboudary area inside a single grain.

Nb5+ ions substitute Sn4+ ions release electrons greatly improve the electrical properties of SnO2 thin films, Nb oxide lighter in color, a feature that can improve the visible light transmittance of the film[8]. 2005 Jun Feng-yan et al[9] use sol - gel technology, indirect gelling SnO2 thin films were prepared by the legal system, to optimize the sample parameters, and the samples were characterized. 2013 Li Ming-chao[10] prepared grain distribution of Sb / SnO2 transparent conductive film, and the surface morphology was studied. 2013 Brion Bob et al[11] prepared a particle size of SnO2 film 2 ~ 4nm, and good optical properties of the film can be used in solar cells and so on. 2014 Duan Xin et al[3] antimony-doped tin oxide powders, prepared under different conditions the powder structure and morphology were analyzed.
Period occurs in the low wave number between 600~700cm-1 a strong absorption band, is Nb-O stretching vibration region, Nb-O stretching vibration region is also this interval, the band changed after the first sharp smooth by Figure 4 can be seen Nb5+ doping amount exceeds 8%, the absorption increased significantly, we can see an increase in the crystal lattice distortion.
Because Nb5+ instead of Sn4+ into the lattice of metal ions occupy the lattice, in order to maintain overall electrical neutrality, we need to enter a greater number of Nb5+, releasing more electrons, bound by the role of these electrons is very small, to move freely in the crystal to improve the conductivity of the film.

Danaila(1) (1)Competences Center: Interfaces-Tribocorrosion-Electrochemical Systems (CC-ITES), Faculty of Engineering, Dunarea de Jos University of Galati, 47 Domnească Street, Galați, Romania *Phone Number: +40 744216277, e-mail: Lidia.Benea@ugal.ro Keywords: biomaterial, dentistry, Co-Cr alloy, corrosion, open circuit potential, electrochemical impedance spectroscopy, cyclic voltammetry, physiological solutions, pH.
This poses new challenging problems regarding the increasing number of implants required, new diseases to be treated (e.g., Parkinson’s and Alzheimer’s) and organ shortage problems.
The samples were polished successively with waterproof abrasive paper with grain size from 320-4000 mm, with diamond paste of dimensions 3-1 μm and a suspension of SiO2 (particle size 0.04 μm) to achieve a mirror finish.