It presentes the modal of " bimorph degradation " . unwoven meshes were formed by pdlla / ha composite fibers with diameter of 10 ~ 15 m and embedded by i collagen albumen , polylysine and collagen albumen of the rats " tails 前期降解较为缓慢， ph值基本稳定地保持在7 . 0左右， ha真正起到了代偿pdlla降解引起的ph下降的作用，有助于防上无菌性炎症的发生，也有利于细胞生长和组织形成。
2.
The first system consisted of a bucket filled with a substrate of sand / gravel ( 20cm of depth ) , on the bottom of which was a 80 mesh / inc2 of nylon ( s1 ) ; the second was similar , but was planted with lolium perenne lam ( s2 ) ; the third was planted with a grass plate consisting of 7 layers unwoven fabric planted with l . perenne ( s3 ) 第一个装置底层装20公分高的沙砾，上面放80目尼龙（ s1 ） ；第二个装置底层也放同样动西，但上面放多花黑麦草；第三个装置里面放着底层为7层无纺布上面种着多花黑麦的圆盘。
3.
Basing on the realities mentioned above , the contents of this paper are as follows : first , the paper is summarized the results of tension test on geosynthetics . then the paper presents the contents and results of tension properties on uniaxial oriented geogrid , warp knitting geogrid , woven geotextile and unwoven geotextile 首先，归纳总结国内外土工合成材料拉伸试验的研究成果，通过室内试验研究常用的加筋材料? ?单向土工格栅、经编土工格栅、有纺土工布和无纺土工布的拉伸特性。
4.
Poly ( lactic acid ) ( pla ) has been widely used as scaffolds for tissue engineering because of its good processability , good biocompatibility and suitable mechanical properties . but its catabolite would often induce erythrophlogosis . the preparation and properties of the pdlla / ha compound fiber and cell culture on the pdlla / ha unwoven meshes had research researched in this paper 聚乳酸( pla )因其良好的生物相容性、生物可降解性以及良好的可塑性而被广泛地应用于组织工程支架材料的研究，但是单一的聚乳酸长期在培养液或机体内因降解而易导致局部炎性反应。
5.
Second , the paper is collected and analyzed the study results of interface properties on reinforced material . then the paper presents the contents and results of interface properties on uniaxial oriented geogrid , warp knitting geogrid , woven geotextile and unwoven geotextile placing in three different kinds of soils 其次，收集并分析国内外土工加筋材料界面特性的研究成果，通过室内直剪摩擦试验和拉拔试验研究常用的三种加筋材料? ?单向土工格栅、经编土工格栅和有纺土工布在不同填料中的界面摩擦特性。
