The experiments were carried on the synthesized diester-based magnetic fluids to characterize their saturation magnetization, density, viscosity, stability and the diameter of particles.

The effects of preheating temperature of SiC particle, the temperature of melt, the externally applied infilt ration pressure, and the diameter of particles on fabrication of aluminum matrix composites with high volume fraction using the squeeze exhaust casting process were studied by orthogonal experiment method. The experimental results show that preheating temperature is the remarkable factor influencing the fabrication of the composites. The mechanism of stoppage of flow during the process were analyzed by measuring melt temperature in the squeeze exhaust casting process.

Based on verifying the existing distribution formula application by the experimental data, a new formula of exponential of velocity distribution was proposed, at the same time, the variational law of coefficient and index in the new formula with sediment concentration, diameter of particles and hydraulic condition is analyzed, It has been concluded that coefficient increases with increasing sediment concentration,hydraulic condition and diameter of particles;

The specificsurface area of LiCoO 2 powders was tested by BET technique. The resultshows that the specific surface area of LiCoO 2 powders by PVA-assistedSol-Gel method can reach 6.913m 2 ·g -1; the mean diameter of particles is0.211μ m.

The morphological structures of the sulfided Mo/CNTs catalyst were examined by TEM. The results indicated that the catalyst particles were supported at the outer walls of carbon nanotubes; and the average diameter of particles was 10 nm.

Results show that the particles and PAHS on the particle appear as logarithmic noctmal distribution along with the diameter of particles, PAHS being absorbed much more on the fine particle.

As a result,it could show the data directly and close linear relationship without the interference of color of sauce. The diameter of particles in liquid samples had little influence on the determination of turbidity of soy sauce. Therefore,the turbidimeter is suitable for the determination of soy sauce clarity.

as t 8/5- cooling time from 800 ℃ to 500 ℃ increased from 16 s to 60 s the Nb relative content in particle decreased to 20%～50%, while average diameter of particles increased to 37.2 nm from 31.4 nm with particles number decreasing to 1.20/μm 2 from 1.95/μm 2;

however as t 8/5 increased further from 60 s to 120 s, due to slow cooling rate and low precipitating temperature the average diameter of particles decreased again to 26.3 nm with particles number increasing to 3.56/μm 2 and spherical particles with higher Nb content were re-observed.

The author gives a review of the general characteristics of the two-phase fluid flow in pipes,and discusses possible methods of flow measurement of solid- gas systems and of two-component liquid-gas systems.The main conclussions are as follows:1.Difference between characteristics of single-phase flow and two-phase flow in pipes must be recognized.2.For flow measurement in solid- gas systems,the relation between the size distribution and the effective diameter of particles must be found by experiment.3.For...

The author gives a review of the general characteristics of the two-phase fluid flow in pipes,and discusses possible methods of flow measurement of solid- gas systems and of two-component liquid-gas systems.The main conclussions are as follows:1.Difference between characteristics of single-phase flow and two-phase flow in pipes must be recognized.2.For flow measurement in solid- gas systems,the relation between the size distribution and the effective diameter of particles must be found by experiment.3.For liquid-gas systems,in order to estimate the flow from some measurable quantities,the flow pattern must be determined first.

A laser-doppler anemometer system coupled with direct cone angle measurement has been applied in the work reported in this paper to obtain laminar burning velocity curves for npopane-air and LPG-air. The result obtained compare well with the information introduced by 12th world gas conference.The structure of seeding generator for solid particales investigated in this work is simple and reliable. It is currently being extended in application to lower flow gas system.A difference of unburned gas mixture velocity...

A laser-doppler anemometer system coupled with direct cone angle measurement has been applied in the work reported in this paper to obtain laminar burning velocity curves for npopane-air and LPG-air. The result obtained compare well with the information introduced by 12th world gas conference.The structure of seeding generator for solid particales investigated in this work is simple and reliable. It is currently being extended in application to lower flow gas system.A difference of unburned gas mixture velocity between the presence and absence of the flame (△W) has been measured using LDA. It is demonstrated that the △W increases with burning velocity of gas mixture.Finally, this paper presents the method to measure concentration and the diameter of particle and discusses that laser-doppler signal is influenced by the concentration of particle.

The leaching of ores by solvent to extract non-ferrous metals is one of the important operations in metallurgical industry. A mathematical model for the leaching of ores, which is based on the theory of Population Balance and on the model of single particle leaching, is proposed in this paper. This model can be used in the multistage counter current leaching process with a definite distribution of diameters of particles.