Soft Magnetic Materials

Volume 298

doi: 10.4028/www.scientific.net/AMR.298

Paper Title Page

Authors: Guo Wei, Peng Fei Zhang, Xun Jin, Xing Wu Long
Abstract: . Bias of ring laser gyro (RLG) changes with temperature in the non-linear way, which is an important restraining factor for improving the accuracy of RLG. For the deficiency of least squares regression and neural networks, a new method of temperature compensation of RLG’s bias was proposed, that is, building function regression model by using Least Squares-Support Vector Machine(LS-SVM). Static and dynamic temperature experiments of RLG’s bias are carried out. The results show that: after static temperature compensation, the maximum error of RLG’s bias has dropped from 0.0413º/hr to 0.00073º/hr; while after dynamic temperature compensation, the gyro precision has increased from = 0.0102º/hr to = 0.0011º/hr. It indicates that this method has improved the laser gyro’s accuracy considerably.
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Authors: Chuan Zhen Zhao, Li Yuan Yu, Chun Xiao Tang, Ming Li, Jian Xin Zhang
Abstract: In the paper, a model is developed to discribe the band gap energy of Ⅲ nitride alloys. A new parameter A is used to discribe the band gap bowing. The new bowing parameter A is obtained by fitting the experimental values of the band gap energy. AAlGaN =0.46, AInGaN =0.59 and AInAlN =1.90 are obtained by fitting the experimental values of the band gap energy for AlGaN, InGaN and InAlN, respectively. The model is also suitable to discribe the band gap energy of other Ⅲ-Ⅴ ternary alloys.
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Authors: Chuan Zhen Zhao, Li Yuan Yu, Chun Xiao Tang, Ming Li, Jian Xin Zhang
Abstract: In the paper, the factors influencing the band gap bowing of the bulk alloy with random distribution are analyzed and it is found that the bowing coefficient is compositional dependent. The reasons for the large dispersion of the bowing coefficient are also analyzed. In addition, we obtained the bowing coefficient (b=2.26+5.04x) for InAlN by fitting the experimental data.
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Authors: Qi Lan Huang, Wei Gang Qin, Gong Yuan Yang
Abstract: This paper introduces application of the intelligent sensor in the yarn quality online detection. Using computer control techniques,Adopting the high accuracy intelligent laser sensor to detect the yarn diameter, display and print out the real-time evenness of the yarn by analyzing the yarn sampled datas. The device is more portable, forward-looking, intelligent and low cost, It is the development direction of the yarn quality testing in cotton factory.
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Authors: Tong Wei, Qing Jun Zhou, Qing Gong Song, Chuan Zhen Zhao, Jun Ming Liu
Abstract: We investigated the colossal dielectric constant behavior and interesting dielectric relaxation over broad temperature and frequency ranges in complex perovskite Sr0.9Ba0.1Ti0.9Ru0.1O3 ceramics by using HP4294 impedance analyzer. Through the discussion, there exists a clear link between the dielectric relaxation and the sample conductivity. It’s believed that hopping of electrons between color centers not only produce conductivity but also give rise to dielectric relaxation behavior.
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Authors: Tong Wei, Hui Yu Yan, Yi Fei Chen, Xue Lian Qi, Song Qing Guo, Chuan Zhen Zhao, Jun Ming Liu
Abstract: We synthesize polycrystalline Sr1-xPbxTiO3 (SPT) (0
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Authors: Yun Ying Wang, Qi Lan Huang, Gong Yuan Yang
Abstract: In order to improve the modernization of textile production, single off-line testing will miss a lot of information of work-field. It is necessary to improve the yarn quality testing methods to make it more perfect. So the production will grow toward the rapid, high yield, high-quality. In this study, only a sensor that is Intelligent laser sensor is used to finish the yarn quality on line testing. Experimental device is easy to install and carry. It can print images and data at all times. The accurate information of equipment state and yarn can be got from the experimental curve and the trend figure, which improved the inspection efficiency and accuracy of yarn quality.
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Authors: Cheng Wei Hou, Zhi Jiang Cai
Abstract: In this paper, electro-active actuator made with cellulose and polyurethane blend film is prepared, which can show high bending displacement in the air with room humidity condition. To fabricate this actuator, cotton cellulose was dissolved into a N,N-dimethylacetamide (DMAc) and lithium chloride (LiCl) solvent system. Polyurethane prepared by poly[di(ethylene glycol) adipate] and hexamethylene diisocyanate (HDI) was mixed with DMAc cellulose solution by stirring. The mixed solution was cast to form a film followed by depositing thin gold electrode on both sides of the film. The actuator was actuated under AC voltage at an ambient condition by changing the actuation voltage, frequency and time. The actuator revealed a large bending displacement under low activation voltage, low electrical power consumption and good durability at room condition. This cellulose- polyurethane blend actuator is suitable for dry and durable actuator and promising for many biomimetic applications in foreseeable future.
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Authors: Cheng Wei Hou, Zhi Jiang Cai
Abstract: This paper describes a new electro-active actuator based on cellulose and poly(3-hydroxybutyrate) (PHB) blend film that can produce high bending displacement in room humidity condition. Cellulose based actuator has been reported as a smart material that has merits in terms of lightweight, dry condition, biodegradability, sustainability, large displacement output and low actuation voltage. However, its actuator performance is very sensitive to humidity, which requires high humidity condition for the maximum actuator performance. To overcome this drawback, we introduce cellulose-PHB blend film based actuator. To fabricate this new actuator, cellulose and PHB were dissolved in trifluoroacetic acid. The solution was cast to form a film followed by depositing thin gold electrode on both sides of the film. The morphology of the blend was characterized by scanning electron microscopy. The actuator can be actuated under AC voltage. The bending performance was evaluated in terms of free bending displacement, electrical power consumption output with respect to voltage and frequency and lifetime test at ambient condition. Primary results show that this cellulose- PHB blend actuator is less sensitive to humidity and it shows much high bending displacement and long lifetime (more than 10 hours) at room humidity condition. These results indicate that this new cellulose-PHB blend actuator is promising for many biomimetic applications in foreseeable future.
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