Advanced Materials Research Vols. 301-303

Abstract: An image adaptive watermarking algorithm based on ridgelet transform and two- dimensional(2-D) fuzzy partition classification is proposed. In order to obtain a sparse representation of straight edge singularity, the image is first partitioned into small pieces and the ridgelet transform is applied for each piece. After analyzing texture distribution in ridgelet coefficients of each piece, two feature vectors are selected to make up for the ‘wrap around’ effect for FRIT on representation of the image texture. Then the image is classifed into frat regions and texture regions by applying 2-D fuzzy partition classification algorithm with the two feature vectors prepocessed. An watermark sequence is embedded into texture regions with the embedding strength adaptively adjusted by ridgelet coefficients based on the feature of luminance masking and texture masking. Experimental results prove robustness and transparency of the proposed watermarking scheme.

Abstract: Volume and the coal quality of coal measure concerns cost accounting, economic benefit assessment work, when we determine the volume of coal, the camera will be used to obtain image information, and then mosaics and fitting the images, get the clear single pixel level profile. Which obtained a clear outline of a single pixel line is critical important for image fitting.This paper introduced Mallat wavelet modulus maxima edge detection method and fuzzy membership function constructed corresponding algorithm of single pixel level, get edge detection algorithm can obtain good effect.

Abstract: Aluminum evaporation system for a thermal balance test is made in the evaporation system under normal production conditions of the thermal parameters, to understand the energy flow and logistics structure, thermal efficiency and other technical and economic indicators. By analyzing the operating parameters on the influence of steam consumption, the authors find out the current production problems, reduce thermal loss and improve thermal efficiency.

Abstract: Positron Emission Tomography (PET) produces a three dimensional spatial distribution of positron-electron annihilations within an image volume. Various positron emitters are available for use in aqueous, organic and liquid metal flows. Preliminary experiments at the University of Tennessee at Knoxville (UTK) injected small flows of PET tracer into a bulk water flow in a four rod bundle. The trajectory and diffusion of the tracer in the bulk flow were then mapped using a PET scanner. A spatial resolution of 1.4 mm is achieved with current preclinical Micro-PET imaging equipment resulting in 200 MB 3D activity fields. A time resolved 3-D spatial activity profile was also measured. The PET imaging method is especially well suited to complex geometries where traditional optical methods such as LDV and PIV are difficult to apply. PET methods are uniquely useful for imaging in opaque fluids, opaque pressure boundaries, and multiphase studies. Several commercial and shareware Computational Fluid Dynamics (CFD) codes are currently used for science and engineering analysis and design. These codes produce detailed three dimensional flow predictions. The models produced by these codes are often difficult to validate. The development of this experimental technique offers a modality for the comparison of CFD outcomes with experimental data. Developed data sets from PET can be used in verification and validation exercises of simulation outcomes.

Abstract: -elasticity of network that measure the network invulnerability and node resilience measure the node importance are put forward in case of the great amount of calculation and the finite field of application of the existing metrics. The disadvantages of the vulnerability of node，the importance of node ,the tenacity, and the betweenness of node are point out through the comparability. The node resilience and -resilience of network of certain varies types and varies scales networks are calculated and compared, the result of the comparability and analysis is that the metrics this paper confined are effective metrics in measuring the invulnerability in aspects of the field of application and the exactness. the metrics are available in designing the network and evaluating the network invulnerability.

Abstract: The most important operation of electrocardiogram (ECG) signal measurement device is to amplify signal and maintain correct original signal. The operation of all circuits cause electromagnetic interference (EMI), but EMI can be reduced by using special component or some PCB layout approaches. This paper provides an example of portable ECG device to demonstrate a method that can effectively reduce EMI and be applied in finished product. This research has built a lead-1 ECG to reach a low noise operation. This result can be easily applied to portable ECG measurement.

Abstract: Calibration of general temperature sensor, platinum resistor is done with measuring its zero resistance and dispersity of linear system and compensating. Accurate constant current source is used to provide platinum resistor sensor power and four-wire measuring method is designed for self-compensation of lead wire resistance. With amplifying the changing signal of platinum using amplifier of high precision and low temperature drift, and MCPU digital filtering, highly accurate temperature measurement result is got finally.

Abstract: Base state model with amendment is a general method on spatio-temporal database construction. It accesses data with keeping base state changeless and increment variational. In order to improve querying speed, mono-class or muti-class indexes can be added. Improved base state model with amendment adopts to increase number of base states and increment indexes. This paper proposes dynamic base state model with amendment, and base state changes according to actuality, and increment is difference of actuality and database construction state. This method is of save memory space, convenient use of actuality data, and easy to resume history data.

Abstract: This work describes the electrochemical deposition of poly(cobalt(II)-tetraaminophthalocyanine) (poly(Co^IITAPc)) film onto a multi walled carbon nanotubes (MWNT) modified glassy carbon (GC) electrode (designated as poly(Co^IITAPc)-MWNT-GC electrode) by cyclic voltammetric method and the effectiveness poly(Co^IITAPc)-MWNT-GC electrode towards electrocatalytic oxidation of hydroxylamine. Cyclic voltammograms recorded during electropolymerization of cobalt(II) tetraaminophthalocyanine (Co^IITAPc) indicated that good adherent layer of poly(Co^IITAPc) was incorporated on to the surface of MWNT/GC electrode. The electrochemical detection of hydroxylamine was studied by amperometry at the new poly(Co^IITAPc)-MWNT-GC electrode. The modified electrode exhibited good catalytic performance for the electrochemical oxidation of hydroxylamine with an anodic potential of 0.2 V, linear concentration range from 1.7 mmol/L to 0.20 mmol/Land a detection limit of 0.33 mmol/L.

Abstract: The effect of intracavity aberration perturbation on output mode structure properties of unstable laser resonator is been experimentally researched using Hartmann-Shack wavefront sensor on the basis of numerical analysis. Results show that intracavity tilt aberration notablely affects outcoupled intensity distribution, but only a small intracavity tilt perturbation will not obviously augment the high-order aberrations of beam phase properties. The tilt aberration, coma aberration and astigmatism will all be brought, and also tilt aberration is the main component when intracavity mirrors have a vertical movement along the direction of optic axis. When adaptive optical elements such as deformable mirrors are adopted for intracavity aberration correction, the correction for tilt aberration should be considered firstly.