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We have currently investigated the piezoelectric properties of bismuth tungstate, Bi2WO6 (BWO), mono-domain crystals and baium titanate, BaTiO3 (BT), based ceramics for use at high temperature. For BWO, the crystals grown by a slow cooling technique were characterized. The resonance response revealed that the BWO crystals maintained their piezoelectricity up to 400°C. In the solid solution ceramics...
With the method of theoretical analysis, this paper systematically analyzes the limitations, the reasons and the characteristics of the present mode of accounting in the strategy of energy saving. According to the internal demand of this strategy, the author put forward a new development orientation and the related main framework of new accounting mode that would be suitable for the strategy of energy...
This paper states the necessity of establishing the economic evaluation method for healthcare system in enterprises systematically. The author gives the connotations of the proposed a new economic evaluation method for healthcare system in enterprises. The proposed evaluation method for healthcare system can be used in all units with possible accidents for estimating and reflecting the economic effectiveness...
This paper adopts the method of theoretical analysis, introduces the problem of enterprises' risks of credit sale in marketing activities first, and deems that invalid management mechanism of risks will produce risks of bad debts, which would slow down the turnover of capitals, block the normal circulation of cashes and restrain enterprises' healthy and orderly development. Based on comprehensive...
This paper states the necessity of establishing the economic evaluation system for safety resources in traffic enterprises systematically. The author gives the connotations of the proposed new economic evaluation system in traffic enterprises. The proposed evaluation system for safety resources can be used in all units with possible traffic accidents for estimating and reflecting the economic effectiveness...
With the method of theoretical analysis, this paper systematically analyzes the characteristics, the restrictions and the reasons of the present mode of accounting in the strategy of recycle economy. According to the internal demand of this strategy, the author proposed some improvements for new accounting system that would be suitable for the strategy of developing recycle economy. These improvements...
This paper demonstrates the necessity of establishing the evaluation system for safety resources based on data of accounting systematically. The author gives the connotations and the features of the proposed new evaluation system of the safety resources. The main viewpoint of the paper includes that evaluation system for safety resources is used in all units with possible accidents in production and...
Recently, (K, Na) NbO3 (KNN) ceramics and, based on KNN, (K,Na,Li) NbO3 ceramics, (K,Na,Li)(Nb,Ta,Sb)O3 (LF4) perovskite ceramics were reported to show excellent piezoelectric properties and has been regarded as candidates of lead-free piezoelectric materials. In this study, the effect of CuO addition to Li-modified KNN were investigated. The CuO-doping changed it to "hard" piezoelectric...
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