Advanced Materials Research Vols. 230-232

Abstract: The economic growth of Inner Mongolia has ranked first for several years since Western Development. In this paper, we establish a level indicator system for evaluating the level of Regional Economic Development from the following four aspects: economic scale, economic benefit, economic structure and quality of life. Then, we take the data of 2000 as sample data, and apply it to a DEA model based on panel data for evaluating the economic development of the twelve union cities from 2000 to 2009.By the analysis, Inner Mongolia's economic development can be divided into two levels: Erdos , Baotou, Hohhot, Alashan League and Wuhai have a higher level of economic development, Xilinguole League, Hulunbeier, Bayannaoer, Wulanchabu, Chifeng, Tongliao and Xingan League have a poor foundation , the overall development is not ideal.

Abstract: This paper reviews the theory of thermal conduction of ceramic materials with the aim to reduce further the thermal conductivity of plasma sprayed thermal barrier coatings. Methods of reducing thermal conductivity of plasma sprayed thermal barrier coatings including seeking for alternative ceramic materials to 8YSZ, addition of some dopants, preparing nanostructured coating and double-ceramic-layer coating are advised. It is indicated that the combination of colouring plus nanostructured and double-ceramic-layer coating of new ceramic candidate materials of lower thermal conductivity should be an very important research direction in future.

Abstract: Flatness is a crucial parameter describing geometry of the steel strip surface. Measurement of flatness is very important for control of strip shapes. In the paper, the phase shift algorithm was introduced in measurement of flatness, and a new flatness measuring system based on the phase shift technique was developed. A new formula was derived to compute phase value from one single fringe image, which made higher spatial resolution. The system can avoid adverse effects caused by motion of the strip. Compared with present flatness measuring systems, the system presented in the paper gained more accurate results of flatness measurement.

Abstract: TiO₂ film was deposited on glass substrate by a sol-gel process using PEG1000 as a template to prepare porous film. The influences of HCl and water amount, layers of the film, and the amount of PEG100 were investigated. The increase of HCl can slightly promote the photocatalytic activity of the film. When n(HCl):n(TEOT) is 0.2:1, the degradation rate is in its maximal value. The optimal water value can be obtained at n(H₂O):n(TEOT)=3:1. The photocatalytic activity increases with increasing layer numbers. The five layers film has the highest photocatalytic activity, while the activity declines after further increase of film layers. The photocatalytic activity of theTiO₂ film is enhanced with the addition of PEG1000 at first, and then excessive addition of the template leads to activity dropping.

Abstract: For achieving the maximum energy efficiency of Building-integrated Photovoltaics (BIPV) buildings, the Solar Heat Gain (SHG) through the BIPV modules should be measured accurately. A solar calorimetry hot box was designed to test the SHG through the BIPV modules in this paper, which could measure the incoming solar and long-wave radiation various BIPV module configurations. Combined with the electric energy production, a new concept of ratio of solar heat gain to power energy generation efficiency was presented in this paper, which can be characterized as the design indicator of BIPV module’s energy efficiency level for BIPV buildings cooling in hot summer. The influence of indoor climate environment parameters on the electric energy output efficiencies of BIPV modules can be conducted by the solar calorimetry hot box.

Abstract: Steganography is the idea of embedding a secret data in different media and has become an important regulation of methods of data integration. Although the still images are generally applied in the past, is very popular in recent years for the video. The techniques of video data hiding in recent year’s emphasis on the features generated by the video compression standard, a safer method for steganography uses MPEG-4/H.264 Bit Plane Complexity Segmentation (BPCS) algorithm is proposed in this approach. The reason for choosing such a video coverage is the enormous amount of data that can be hidden in each frame of MPEG-4 video. In other words, MPEG-4 has three types of images: I-frame, B, and P frames. Unlike other techniques used to hide data, such as the LSB algorithm, PBCS can achieve better results in both mathematics expression and human vision. In this paper, data is embedded in the videos of the I-frame until the BPCS can reach high levels of integration with low distortion based on the theory that regions of low noise-levels as in a picture can be replaced by noise without a significant loss of image quality. This approach invents data hidden in high-security environments. Experimental results show the success of hidden data in the selected and extracted data from the sequence of frames and also indicate the effectiveness of the implementation plan of steganography compressed video with high security features.

Abstract: Lamb waves are ultrasonic elastic waves that travel inside and along thin plates and is frequently used as diagnostic tools to detect damage in plate-like structures. In this paper, a transient dynamic finite element simulation of Lamb wave with piezoelectric transducers for damage detection in a stiffened plate under different temperature condition is carried out on the commercial finite element code ANSYS platform. Simulations are conducted over a temperature range. The changes in temperature-dependent material properties are used to measure the differences in the response signal’s waveform. The baseline selection method and baseline signal stretch method are used to compensate the temperature influence on Lamb wave propagation. The results of the numerical simulation demonstrate the effectiveness of the temperature compensation approach and the simulated damage on the stiffened plate can be defected effectively under elevated temperatures environment.

Abstract: Electrooptic waveguide technology is suitable for realization of an electro-optic 2x3 switch based on integrated Mach-Zehnder interferometer using polymer material, where ESO of polymeric materials were used. It can provide high performances and it is applicable for all optical switching networks. The relatively low cost technology, easy fabrication process with standard optoelectronic fabrication process and with high degree of integration compared to other technologies make the development of optical switch based on this technology favorable one.

Abstract: Cored wires and arc spraying were used to produce high Mg content Zn-Al-Mg alloy coatings on low carbon steel substrates. And the corrosion mechanism of the Zn-Al-Mg coatings was investigated comparing with Zn-Al alloy coatings by X-ray diffractometer (XRD) and Electrochemical impedance spectroscopy (EIS). The results show that, The Zn-Al-Mg coatings show higher electrochemical corrosion resistance in salt solution than Zn-Al coatings. With addition of Mg, the corrosion products can block off the pores in the Zn-Al-Mg coating, which is so-called self sealing, and thus prevent attack on the underlying steel substrate.

Abstract: As to the disadvantages of traditional contact measurement methods, a non-contact measurement system of yarn tension based on CCD technology is developed, which includes the system working principal and the structure ,the design of area matrix CCD driving circuit, the binary process of video signal boundary features by comparison method. Experimental data from contact measurement and non-contact measurement is contrasted, and the measurement error is analyzed. Experimental results show it is achieved with high accuracy and reliability.