journal of financeporous materials 怎么样

来源：蜘蛛抓取(WebSpider) 时间：2015-01-30 04:28 标签： journal of diabetes
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JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS这个杂志要收费吗？
请问大家投JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS这个杂志要收费吗？要收些什么费？费用多少？Journal of Hazardous Materials这个杂志呢？还有open access 和 no open access有什么区别？初次投稿，望大家帮帮忙
JMMM不收费，磁性材料里算是比较好的杂志之一，点数始终1点几 open access 要收费（即你出钱，帮助别人免费下载），否则不收费。 : Originally posted by qinwang at
JMMM不收费，磁性材料里算是比较好的杂志之一，点数始终1点几 谢谢，Journal of Hazardous Materials这个杂志呢？好投吗？ 这个刊物是不需要收费的，除非你选择开放免费下载。
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eMuch.net, All Rights Reserved. 小木虫 版权所有Frequency-dependent dynamic effective properties of porous materials--《Journal of University of Science and Technology Beijing(English Edition)》2005年03期
Frequency-dependent dynamic effective properties of porous materials
【摘要】：正The frequency-dependent dynamic effective properties (phase velocity, attenuation and elastic modulus) of porous materials are studied numerically. The coherent plane longitudinal and shear wave equations, which are obtained by averaging on the multiple scattering fields, are used to evaluate the frequency-dependent dynamic effective properties of a porous material. It is found that the prediction of the dynamic effective properties includes the size effects of voids which are not included in most prediction of the traditional static effective properties. The prediction of the dynamic effective elastic modulus at a relatively low frequency range is compared with that of the traditional static effective elastic modulus, and the dynamic effective elastic modulus is found to be very close to the Hashin-Shtrikman upper bound.
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【分类号】：TB383【正文快照】：
1 IntroduCtion The detenmnation of the effeetive ProPagation con- stants of waves ProPagating through comPosite mate- rials was a subjeet whieh attraeted a considerable at- tention in the Past several deeades[l一9].A sealar wave ProPagating through an in
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