Advanced Materials Research Vols. 785-786

Abstract: In this paper, the black hole spectroscopy is intriguingly described in the isotropic coordinate by combining the black hole property of adiabaticity and the oscillation velocity of the black hole horizon. The result shows that the horizon area of a Schwarzschild black hole is quantized independent of the choice of coordinates, with an equally spaced spectroscopy always given by .

Abstract: A new potentiometric titration method coupled with multivariate calibration using a flow injection technique for the simultaneous determination of multi-components in alloy has been developed. the titrant is a mixture of EDTA and sodium fluoride, both mercury film electrode and fluorinion selective electrode are inserted in the flow cell. In a process of titration, both the potentiometric of mercury ion and the mixed proportion of reactants at each titration point can be obtained simultaneously from the two electrodes, and then the concentration of each component in the mixture can be obtained from the titration curves by multivariate calibration method. The method is free of volumetric and time measurements, and reduces the consumption of reagents and samples. The method is also very quick in analysis rapidity. The method has been applied for the simultaneous determination of copper, lead and zinc in alloy samples with the relative standard deviation of 0.18%~0.45% and the recovery of 99.5%~101.6%.

Abstract: By analyzing the pattern and law which alternating magnetic field signals affect, the relations of alternating magnetic field signals and flaws were obtained. These relations illustrated alternating magnetic field technology s method and way. Some analysis was done after making contrast test samples. These analysis confirm that alternating magnetic field method can quickly find locations of defects during detection of blade part. It may raise efficiency and ensure equipments safely run.

Abstract: This paper reviews the key technology links of remote monitoring of mechanical conditions of port logistics operations studies ActiveX technology, diversity antenna technology, OPC technology based on each link and introduces the application of above technologies in the intelligent monitoring of port logistics mechanical state.

Abstract: The design and measurement of Verdet constant of magneto optical fiber is reported. An optical beam was found that it linearly polarized at the fiber input changes to elliptically polarized after propagating down the fiber and an elliptical fitting method was studied and reported. Traditional method is based on circle polarized principle, rotation angle is obtained through manually adjust the polarizer which is rather inaccurate especially for small rotations. Through the development of elliptical fitting equations and the test of intensity on major and minor points, fiber Verdet constant can be measured more precisely. The measured data of TZN (TeO₂- ZnO-Na₂CO₃) fiber was verified and it provides improved accuracy compared with existing methods.

Abstract: Based on Matlab image processing technique and backscattered electron image analysis method, a characterization method is set up to make quantitative analysis on pore structure of hardened cement pastes. Adopt Matlab to acquire images, and carry out gradation and binarization processing for them; use the combination method of local threshold segmentation and histogram segmentation to obtain pore structure characteristics. The results showed that evolution law of pore structure of fly ash cement pastes via Matlab image analysis method is similar to the conclusion obtained through BET and DVS. Selecting different angle of backscattered electron images in the same sample, its statistic results are more representative.

Abstract: It is a difficulty to combine artificial neural networks (ANN) with the fault diagnosis of electrohydraulic servo valve. To slolve this problem, the fault diagnosis mechanism of electrohydraulic servo system is analysed, the effecitveness of fault diagnosis based on ANN is verified, and the pressure characteristic data are used to construct ANN samples. Finally, the algorithms of RBF, BP and Elman are compared with the built system and sampled. The results show the RBF algorithm is more rapid and accurate and the proposed intelligent fault diagnosis system of electrohydraulic servo valve is valuable.

Abstract: Applying diffusion model in gas leakage incident consequences analysis could provide favorable technical support and professional assistant method for accident emergency response with great realistic significance for industrial transfer park. The core of analysis lies in the selection and rational use of diffusion model. GPM for continuous released condition with some foundation hypothesis conditions should be modified in practice. Comprehensive amendment was discussed and implemented in this paper based on actual circumstance situation in order to achieve the objective of higher accurater analysis. The improvement successfully enhances the model analysis ability and applicability, which could play a role as an important component in the emergency response system for the parks management.

Abstract: To make B ultrasound images clear, a new image enhancement method was studied.The study used an improved fuzzy algorithm based on gray-level to process B ultrasound images. And the process is largely simple by adding threshold selection which could meet different clinical demand. Several kinds of enhancement algorithms for B ultrasound images are evaluated and compared by using MATLAB to process the same image. The results after contrast show that the improved fuzzy algorithm is effective and achieved in clinical practice.

Abstract: We discuss a class of generalized retarded nonlinear integral inequalities, which not only include nonlinear compound function of unknown function but also include retarded items, and give upper bound estimation of the unknown function by integral inequality technique. This estimation can be used as tool in the study of differential equations with the initial conditions.