本文利用材料科学近年发展的液态金属快淬技术和精轧技术,制备厚度几十μm ,宽20 m m 的超薄合金条带,精工设计编织成击剑防护内衣防护层。这种新防护层材料有刚柔相济的优点,与纯纤维击剑防护内衣比较,超薄合金防护层的刚性和弹性可能...本文利用材料科学近年发展的液态金属快淬技术和精轧技术,制备厚度几十μm ,宽20 m m 的超薄合金条带,精工设计编织成击剑防护内衣防护层。这种新防护层材料有刚柔相济的优点,与纯纤维击剑防护内衣比较,超薄合金防护层的刚性和弹性可能把击剑用力过猛或意外断剑后剑端作用到人体上的能量反弹部分到体外,减少对人体肌肤及内脏的伤害;与国外新型材料卡夫拉(Kevlar)纤维相比,有价格便宜的优势。展开更多
Introduction The factors of personality may be directly or indirectly related to learners’ success in foreion language learning. A lot of research work has been devoted to elucidating what kinds of learner’s charact...Introduction The factors of personality may be directly or indirectly related to learners’ success in foreion language learning. A lot of research work has been devoted to elucidating what kinds of learner’s characteristics appear to be related to success in learning a foreign language and in what way they are retatad. However,the results prove to be problematic. As a result,it is not easy for language teachers to evaluate and utilize the results of those in-展开更多
文摘本文利用材料科学近年发展的液态金属快淬技术和精轧技术,制备厚度几十μm ,宽20 m m 的超薄合金条带,精工设计编织成击剑防护内衣防护层。这种新防护层材料有刚柔相济的优点,与纯纤维击剑防护内衣比较,超薄合金防护层的刚性和弹性可能把击剑用力过猛或意外断剑后剑端作用到人体上的能量反弹部分到体外,减少对人体肌肤及内脏的伤害;与国外新型材料卡夫拉(Kevlar)纤维相比,有价格便宜的优势。
文摘Introduction The factors of personality may be directly or indirectly related to learners’ success in foreion language learning. A lot of research work has been devoted to elucidating what kinds of learner’s characteristics appear to be related to success in learning a foreign language and in what way they are retatad. However,the results prove to be problematic. As a result,it is not easy for language teachers to evaluate and utilize the results of those in-
