This model described relationship of current collapse and traps in buffer layer , and the normalized product of electron mobility and 2deg density with and without current collapses was 0 . 95 vgs 该模型描述了电流崩塌效应与缓冲层中陷阱的相互关系,并获得了电流崩塌前后迁移率与二维电子气浓度乘积的归一化值0 . 95 vgs 。
In our experiment , kow value was also employed to study the aluminum properties in tea infusion ( at gastric and intestine ph condition ) and the influences of catechins , tea polyphenols and fluoride on kow in buffer solution 所以尽管茶汤中的铝的存在形态没有完全研究清楚，但也可以通过测定茶汤铝的kow值，用以推断饮茶与铝在生物体内的吸收和积累情况。
In allusion to the present problems in the system of network , this paper analyzes the principles of buffer overflow , points out the three indispensable qualifications which result in buffer overflow , and brings forward four repair methods 摘要针对当前网络系统存在的问题，文章分析了缓冲区溢出的原理，指出了出现缓冲区滋出现象所具备的三个条件，提出了四种修复方法。
On cytomembrane ; resolved the precipitation in buffer d ( contained triton x - 100 ) shattered by ultrasound , 4 vibrated for 60min , centrifuged at 45000g for 1 hour , took the supernatent to mesure protein concentration and then mesure the pkc activity 目前，在铅的神经毒性研究过程中，铅对pkc的作用引起人们极大关注。这是因为铅比钙对pkc有更高的亲和力。现已知， ph卜可以取代caz ”激活蛋白激酶c 。
Results showed that , kow value rose much higher in intestine ph condition than in gastric , indicating aluminum absorption mainly happened in intestine . tea polyphenols , catechins and fluoride can greatly reduce aluminum kow value in buffer , especially tea polyphenols , egcg and fluoride , showing that these compounds can reduce aluminum accumulation in body respectless the side effects of fluoride 通过测定红茶、绿茶和乌龙茶茶汤中铝的kow值，并且考察了在胃和小肠叫值条件下mw的变化情况，发现kow值在小肠叫条件下升高，推断茶汤中的铝的吸收主要发生在从胃到小肠的过程中。
Abstract : the restoration of the riparian vegetation disturbed by human activities is one of the hotspots of watershed ecology . through interpreting the images of remote sensing in 1985 and 1999 , the basic information of forest resources of lushuihe forest bureau , which is a typical forest area of changbai mountain , was obtained with support of gis . by dividing land covers of lushuihe area into 10 types ( water body , residential land , stump land , farming land , wetland , mature conifer forest , midlife conifer forest , mature broadleaf forest , midlife broadleaf forest , and man - made young forest ) and dividing the riparian zone into four buffers ( in turn , 1000 , 2000 , 3000 , 4000 m away from the river ) , the changes of riparian forest resources during 1985 - 1999 were analyzed . the results showed that the deforestation intension has obviously decreased and the whole environment has been evidently improved , but the riparian ecosystem was still flimsy . in buffer 1 , 2 , 3 , the area of midlife conifer forest increased largely , but the areas of other types of land covers all decreased . midlife conifer forest had a comparatively good status in the three buffers . in buffer 4 , midlife conifer forest , mature conifer forest , and mature broadleaf forest formed a forest - age rank that is helpful to stabilize the forest ecosystem and exert its functions . area percentage of wetland decreased in buffer 1 , buffer 2 , and buffer 3 , even in buffer 4 in which forest ecosystem rehabilitated comparatively well , so protecting and rehabilitating wetland is a very difficult task 文摘:本文对两期遥感图像进行解译,并在gis支持下提取露水河林业局主要河流两岸各缓冲区森林资源信息,经分析得到各类地物在1985年及1999年的变化趋势.结果表明:在河流沿岸对森林的采伐强度1999年较1985年明显减小,整体生态环境较1985年有所改善.在缓冲区1 , 2 , 3除中龄针叶林大幅度增加外,其它地物类型面积均减少,由此可以看出,在这三个缓冲区内针叶林得到了较好的恢复.在缓冲区4内,中龄针叶林、成熟针叶林、成熟阔叶林形成一个林龄梯队,有利于森林生态系统的稳定与功能的发挥,十五年间缓冲区4受到的干扰相对较小.湿地数量在四个缓冲区内均有所减少,虽然在缓冲区4内森林生态系统恢复的较好,但湿地面积仍有所减少,说明保护及恢复湿地资源是一件非常艰巨的任务,必须引起高度重视.图5表2参12
The restoration of the riparian vegetation disturbed by human activities is one of the hotspots of watershed ecology . through interpreting the images of remote sensing in 1985 and 1999 , the basic information of forest resources of lushuihe forest bureau , which is a typical forest area of changbai mountain , was obtained with support of gis . by dividing land covers of lushuihe area into 10 types ( water body , residential land , stump land , farming land , wetland , mature conifer forest , midlife conifer forest , mature broadleaf forest , midlife broadleaf forest , and man - made young forest ) and dividing the riparian zone into four buffers ( in turn , 1000 , 2000 , 3000 , 4000 m away from the river ) , the changes of riparian forest resources during 1985 - 1999 were analyzed . the results showed that the deforestation intension has obviously decreased and the whole environment has been evidently improved , but the riparian ecosystem was still flimsy . in buffer 1 , 2 , 3 , the area of midlife conifer forest increased largely , but the areas of other types of land covers all decreased . midlife conifer forest had a comparatively good status in the three buffers . in buffer 4 , midlife conifer forest , mature conifer forest , and mature broadleaf forest formed a forest - age rank that is helpful to stabilize the forest ecosystem and exert its functions . area percentage of wetland decreased in buffer 1 , buffer 2 , and buffer 3 , even in buffer 4 in which forest ecosystem rehabilitated comparatively well , so protecting and rehabilitating wetland is a very difficult task 本文对两期遥感图像进行解译,并在gis支持下提取露水河林业局主要河流两岸各缓冲区森林资源信息,经分析得到各类地物在1985年及1999年的变化趋势.结果表明:在河流沿岸对森林的采伐强度1999年较1985年明显减小,整体生态环境较1985年有所改善.在缓冲区1 , 2 , 3除中龄针叶林大幅度增加外,其它地物类型面积均减少,由此可以看出,在这三个缓冲区内针叶林得到了较好的恢复.在缓冲区4内,中龄针叶林、成熟针叶林、成熟阔叶林形成一个林龄梯队,有利于森林生态系统的稳定与功能的发挥,十五年间缓冲区4受到的干扰相对较小.湿地数量在四个缓冲区内均有所减少,虽然在缓冲区4内森林生态系统恢复的较好,但湿地面积仍有所减少,说明保护及恢复湿地资源是一件非常艰巨的任务,必须引起高度重视.图5表2参12
