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Bi0.5Na0.5TiO3-BaTiO3 (BNT-BT)-based ternary solid solutions were investigated for high-temperature capacitor applications. Through a comprehensive investigation of the (1 – $x$ )(0.92Bi0.5Na0.5TiO3-0.08BaTiO3)-$x$ NaNbO3 [(1 – $x$ )(BNT-BT)- $x$ NN, $x= 0$ –0.45] system, 0.85(BNT-BT)-0.15NN was selected as the parent matrix due to its relatively high permittivity (>1800) and favorable energy-storage...
Linear dielectric materials are ideal options for energy storage application due to the typical high energy storage efficiency and breakdown strength. In the present work, pore free Ca0.6Sr0.4TiO3 (CST) ceramics with various amounts of Mn dopants (0%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 1.0%, 1.5%, 2.0%) were prepared via solid state reaction method. P-E curves were measured under a temperature range of...
The phase structure, microstructure, dielectric and energy storage properties of 0.85(0.92Bi0.5Na0.5TiO3-0.08BaTiO3)-0.15(Na1−3xBixNbO3) (BNTBT-NBxN) polycrystalline lead-free ceramics were systematically investigated. Dense and pore-free samples were prepared by conventional solid state reaction method. X-ray diffraction results indicated that the solid solubility of Bi in BNTBT-NBxN system lay at...
Finger vein has been proved to be an effective biometric for personal identification in recent years. Inspired by the good power of Gabor filter in capturing specific texture characteristics from any orientation of an image, this paper proposes a simple, yet powerful and efficient local descriptor for finger vein recognition, called histogram of competitive Gabor responses (HCGR). Specially, HCGR...
Pedestrian detection is one of the key technologies in the field of computer vision. To improve the accuracy and efficiency of the recognition system, a variety of feature extraction and classification methods has been utilized on this challenging task. This paper proposes a novel multi-feature extraction and selection method to represent and distinguish different categories of samples. In addition,...
Finger vein biometric has received considerable attentions in recent years. However, there is no approved and benchmark finger vein database for researchers to evaluate their algorithms. Furthermore, few public finger vein databases are available online. Aiming to support a benchmark database, in this paper, we introduce a representative finger vein database captured by a portable device, which is...
Local line binary pattern (LLBP), an improved version of local binary pattern (LBP), has the limitation that it can only extract horizontal and vertical line patterns, so that the effective information in an image may not be extracted and fully utilized. In this paper, we propose an extended LLBP method for finger vein identification, which is named polydirectional local line binary pattern (PLLBP)...
An new swarm intelligence algorithm based on the behavior of honeybee swarms has been proposed for some years, namely, Artificial Bee Colony(ABC). In this work, ABC is used for optimizing a set of split in a given integration interval by simulating the foraging activities of bees and reflecting the changing trends of the integrand. At the same time, this work also compares the performance of ABC algorithm...
In this paper, a novel explicit image filter, called Guided Gabor filter, is proposed to extract the finger vein pattern without any segmentation processing, and lower performance reduction for poor quality images which result from low contrast, illumination, or noise effects, etc. The proposed filter is contributed for finger vein enhancement, noise reduction, and haze removal without being affected...
In this paper, we propose a robust blind watermarking method based on correlation detector. A random binary watermark is generated by a secret key and bit-wisely embedded into one sub-band of the DWT domain of the image. A correlation based detector which does not need an original image is used to determine whether a watermark exists or not in an image. Experimental results show that the proposed...
In this paper, the oil-produced water (PW) mixed with fresh water (FW) was treated before it was injected into reservoirs. The effects of the factors such as pH value, variety and quantity of oxidants and inorganic flocculants, quantity and molecular of organic flocculants, the order and time of the reagents to be added on the water quality including amount of scale buildup, iron content, oil content,...
In this paper, Yushenfu mining area is taken as an example. On the basis of analysis and research of formation mechanism of mining subsidence, using principal component analysis and grey correlation analysis method, factors which affect the damage degree of mining subsidence have been selected. It is determined that disturbance coefficient, the ratio of width to depth, comprehensive hardness of overlying...
In the paper, the quality of the mixed waste water with fresh water in low permeability reservoirs is analyzed. It is found out that the sediment components of the mixed waste water with fresh water are mainly CaSO4. Except for the pH value, the oil, suspend-solids, total Fe content of the mixed fresh and waste water are beyond the standard requirement. The different proportions of the mixed waste...
To acquire land surface albedo under the condition of a small quantity of field data and calibration data, on the basis of the MODIS remote sensing image data in Xinjiang area and the spectroscopic land surface data simultaneously observed in the field, multiple linear regression equation involving the measured broadband albedo and narrow-band albedo of MODIS image data in the same time interval and...
By field environment investigation and collecting soil samples in the Shuangqiao river basin, the heavy metal contents of Hg, Pb, Cd, Cr, As, Cu, Zn in the soil were analyzed, and the pollution of the soil was assessed with geo-accumulation index. The results showed that geo-accumulation index of Hg was 0.036–2.286, and 29.63% sampling sites had grade 2 degree of pollution, equivalent to moderate...
As an important water resource, rainfall resources play a great role in human's production life and socio-economic development. In this paper, the northern typical city—Xi'an was taken as an example. On the basis of temporal and spatial distribution and utilization of water resources as well as the average annual precipitation statistics during 1999 to 2008 in Xi'an, the theory of rainfall frequency...
With the application of polyethylene film, “white pollution” has been becoming worse and worse. In recent years degradable film has become popular in Northern regions of China. Photo-biodegradable polyethylene (PBD-PE) film, containing starch made in Nanjing of China, has been developed and applied in agriculture to find out its field effect. It can increase soil temperature, preserve soil moisture...
A 10 meter depth exploration shaft was dug in Zhengning County, Gansu Province, where is located in the south of the loess plateau. The water content probes were installed on the wall of the shaft to monitor water migration process in the loess as the precipitation infiltrating in it. Since Oct. 16th 2010 to recent, 145 days of the water content data in different depths have been obtained. It is shown...
In this paper, the chemical oxidation-coagulation method was used to treat oily wastewater containing high methanol and the influence factors of coagulation were studied. When pH value of wastewater was adjusted to 8.5, the dosage of H2O2, PAC and cationic polyacrylamide was 175 mg·l−1, 40 mg·l−1, 1.0 mg·l−1 respectively, the quality parameters of coagulated water such as pH value, contents of oil...
The salt erosion occurring in loess area caused slope collapses frequently. The analysis for soluble salt in loess were conducted with 10 pairs of specimen collected from the toe of slopes nearby the collapses induced by typical salt erosion in the loess region. One of the each pair of specimen was taken from the corroded surface soil and another from the internal soil at the same site. The comparison...
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