New progress in basic research of diffusion phase transitions and superparaelectricstate etc. on relaxor ferroelectrics are briefly presented.

简要地介绍弛豫型铁电体的扩散相变和超顺电等理论研究的最新进展。

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Research mechanism of diffusion and infiltration of concrete, analyze the main influence factor of the concrete permeability and summarized the method of testing of the penetrating index of concrete.

研究了水、氯离子及气体在混凝土中的渗透与扩散的机理，分析了影响混凝土渗透性的主要因素及有待进一步研究的方向，并总结了混凝土渗透性指标的测试方法。

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This article reviews the research progress in the aspects of diffusion path, microbiology, treatment of maxillofacial space infection.

下面就颌面部间隙感染的扩散途径、微生物学和治疗等方面的研究进展作一综述。

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The International Centre of Research Chantal Biya, in Yaounde, it's an Inter-African and International centre of excellence which has the mission of contributing to the eradication of HIV and Aids infections through scientific research, medical assistance and the diffusion of health information.

UNESCO: Natural Sciences