Advanced Materials Research Vols. 466-467

Abstract: Complex of calcium(Ⅱ) and maleic aniline acid had been synthesized based on maleic anhydride, aniline and calcium sulfate. Some effects of combined sequence and the structure and performance has been studied, Based on experiments one kind of Calcium maleic aniline acid salt were synthesized. The results showed that the complex of calcium(Ⅱ) with N-phenyl maleamic acid is light yellow powder, and its melting point is 195.25 °C. The chemical formula of the complex agreed with CaL2nH2O, where the N of amide group and O of carboxy group coordinated with calcium. The complex could be used as a thermal stabilizer for PVC due to its good effect on thermal stability of PVC. The molecular formulas of rare-earth maleic aniline acid salt were confirmed by element analysis DSC and UV. The thermal stabilities of calcium maleic aniline acid salts were researched through static methods. Indicated that the calcium maleic aniline acid salts has certain heat-stable function to PVC.

Abstract: This paper describes the morphology and mechanical properties of novel electrospun zein based fibrous membranes. From the results, due to adding PVA, it was found that the electrospun fibers of zein can turn into a new strong membrane. The fibrous membranes were characterized by tensile testing, scanning electron microscopy(SEM) and differential scanning calorimetry(DSC). Effect of PVA was analyzed as one of the most significant factors affecting the mechanical characterization of fibrous membranes. The compatibility of zein/PVA nanofibrous were also analyzed by using DSC method.

Abstract: CFD (computational fluid dynamics) is a good method for simulation of the oil-gas separator. When the volume concentration is less than 10%, the oil particle tracks can be simulated by DPM （Discrete Phase Model）. The results show that the separation efficiency is obviously affected by the diameter of separator air-outlet, the diameter of separator oil-outlet, and the angle of separator cone. But the quantified analysis on separation efficiency is difficultly brought forward by CFD. RSM (response surface methods) can help to identify factors influencing the responses by experiments. Finally, the optimum responses and design parameters will be obtained altogether.

Abstract: Elastic impedance (EI) inversion is one of the prestack seismic inversion methods, which can obtain P-wave and S-wave velocity, density, Poisson ratio, Lame coefficients and other elastic parameters. But there have been many EI formulas nowadays, so which formula should be used in inversion is an urgent problem. This paper divides these formulas into two categories, and use several forward modeling to test the accuracy of these EI formulas. It shows that using the first kind of EI formulas in near offset seismic data can get high precision results.

Abstract: The present investigation was aimed at optimization of BMPs loaded PLGA microspheres formulations resulting in improved encapsulation efficiency and sustained release of BMPs by varying the molecular weight and copolymer composition of PLGA. Double-emulsion solvent evaporation method was used to prepare the microspheres. The effect of polymer molecular weight and copolymer composition on particle properties and release behavior in vitro was reported. The particle size and encapsulation efficiency increased with increase in molecular weight and lactide content of PLGA. While BMPs release in vitro decreased with increase in molecular weight and lactide content of PLGA. SEM pictures revealed that almost all microspheres were spherical but internal morphology was different. The morphology of PLGA microspheres with exorbitant molecular weight(100kD) was anomalistic whereas the morphology of PLGA microspheres with higher glycolide content(50) have porous structures.

Abstract: Applying BP neural network improved by GA to build a nonlinear multi-objective model between formulation ingredient and mechanical properties of electric locomotive pantograph carbon slide. And on the basis of test data improved neural network is trained; finally we can get a genetic neural network model. Therefore, when given specific formulation of carbon slide plate, it is able to predict the corresponding mechanical properties. The research shows that the trained genetic neural network can accurately predict relevant properties of carbon slide plate and be confirmed the practical significance of the algorithm.

Abstract: Landfill is the main means of solid waste treatment in China at present, and the layers will leak different extent in the laying time. It is essential to locate leakage. The paper raises the conception that the application of transmission line model in the landfill leakage detection, the commonly method of TDR (Time Domain Reflectometry) is introduced, the transmission line model of landfill leakage detection is established, and the formula of a single loophole model is deduced, the result of computer simulation for the transmission line in landfill leakage detection is given. For with the leakage or not, potential distribution is contrasted. From transmit frequency and transmission line spacing for the influence of potential distribution, we use comsol to simulate. The results show that, the transmission line can be an effective method to locate the leakage region in a landfill.

Abstract: Foam is a high efficient technology for controlling dust in underground coal mine,and foam generator is one of the core components of the technology. Aiming at designing the key structural parameters of foam generator scientifically, the velocity and pressure distribution of foam generator under different parameters were simulated and displayed by CFD (Computational Fluid Dynamics) software. The results show that the intensity of gas-liquid mixture in foam generator reaches the maximum when the vortex generator is 24mm away from the throat and the baffle with a 45° angle. Under the circumstances, the pressure is well-distributed around the vortex generator and the outlet of foam generator, and the foaming effect best.

Abstract: Multicast routing technology of Ad hoc network is a method of transferring specific data to a group of clients selectively; therefore, quality of the services is the key to evaluate the method. After the analysis of energy model and other routing algorithms ,an energy model and a balanced energy network multicast routing algorithm EBAMRA have been proposed in this article,. Experiments had been done, the simulation results show that this algorithm is feasible and effective, which provides a new and effective way of Ad hoc multicast routing technology.

Abstract: This paper uses the bicubic Hermite element to compute the first four eigenvalues of the vibration problem of clamped plate by Matlab program and gives upper bound of the exact eigenvalues. Combing Matlab experiments on Morley element for lower spectral bound we can provide a range of the exact eigenvalues of biharmonic operator more accurately.