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有史以来,木材就为人类服务。木材作为一种再生资源,广泛应用于工业、农业、建筑、交通、采矿和能源等各个部门,且与人类的日常生活息息相关,随着人类社会的进步,木材需要量和使用范围不断扩大,对木材品质和用途(包括某些特殊用途)所要求的标准日益提高。然而,木材是天然生长的材料,在保存和应用中存在着固有的缺陷,对这些发展着的要求,暂时尚不能如愿以偿。无论过去、现在和未来,一些新的耐人寻味的课题不断展现在我们的面前。在我国,如何根据现有的森林资源,合理地科学地利用木材,这是木材科学工作者和材料研究人员责无旁贷的任务。一、赋予或提高木材某种性能木材能传播声音。很早以前,人们就曾利用敲击木材发出的音响情况来鉴别木材的品质:如伐木工敲击树干,电讯工敲击电杆,养路工敲击枕
Wood has historically served mankind. As a renewable resource, wood is widely used in various sectors such as industry, agriculture, construction, transportation, mining and energy, and is closely related to the daily life of mankind. With the progress of human society, the demand and use of wood have been constantly expanding. The standards required for wood quality and purpose, including some special uses, are increasing. However, wood is a naturally-occurring material with inherent defects in preservation and application. However, it is still not yet fulfilled for these developmental requirements. No matter the past, the present and the future, some new intriguing topics continue to unfold before us. In our country, how to use wood rationally and scientifically according to the existing forest resources is the unshirkable task of wood science workers and material researchers. First, to give or improve certain properties of wood Wood can spread the sound. Earlier, people used the acoustics of percussive wood to identify the quality of wood: lumberjack struck trunks, tellers struck poles, road builders knocked on pillows