The last part concludes that mr dampers is one of the very attractive control elements in semi - active control . as one of mixed model mr dampers , armature piston ' s mr dampers have principle designs good function and better practical value , it ' s worth to popularize use . about the armature piston ' s mr damper ' s designs , the space of work , the diameter of wok and the length of magnetic pole have obvious affects to the force of mr dampers , mr fluid materials should be paid attention , input electric current affects mr dampers greatly the high current increases the damping force , the effect of reduce vibration increase obviously , 最后，论文给出了结伦：磁流变液阻尼器是半主动控制装置中非常吸引人的控制元件之一，混合工作模式的磁流变阻尼器结构简单，阻尼效果比流动模式和剪切模式均要好，是一种比较理想的磁流变阻尼器；电枢活塞式磁流变阻尼器作为混合模式磁流变阻尼器的一种结构形式，其结构设计合理，性能良好，具有较强的实用价值，值得在工程中推广应用；在电枢活塞式磁流变阻尼器的设计中，应特别注意工作间隙h 、工作直径d 、磁极长度卜都对阻尼器的阻尼力有明显的影响，并注意选用合适的磁流变液材料；输入电流对磁流变阻尼器的阻尼效果影响很大，输入大电流时阻尼力明显增大，减振效果明显提高。
The killing effect on oncomelania hupensis by lixivium of pterocarya stenoptera , nerium indicum , rumex japonicus and their mixture was studied . differences of the snails mortality were studied also . the three kinds of plant material could kill the snail effectively both in spring and in autumn . but the mortality was different when the experiment is done in different seasons or with different lixivium . the effect in spring was better than that in autumn . n . indicum was the most effective among the three kinds . the effect by mixture was better than that by unitary material , and the effect by the mixture of the three kinds was better than that by two kinds . the variance analyses showed that the experiment could be modified , and some ingredients concentration in mixed lixivium could be reduced . the experiment was valuable in enhancing the power of killing the snail and saving plant material 对枫杨、夹竹桃和土大黄以及它们的组合水浸液的灭螺效果作了比较研究,结果表明: ( 1 )灭螺效果均随水浸液浓度的增高而增强; ( 2 )这3种植物材料及其组合水浸液的灭螺效果都是春季比秋季好; ( 3 )组合水浸液的灭螺效果比单一植物材料水浸液的灭螺效果好; ( 4 )方差分析的结果说明植物材料组合水浸液灭螺在保证灭螺效果的前提下,还可以适当降低组合水浸液中的浓度.以上结论对提高植物材料的灭螺效率和节省植物材料的使用量有着重要的意义,同时也为组建植物灭螺群落提供了有益的参考
There was a highly significant correlation between the highest rain intensity in 30 minutes ( abbreviated as i30 ) and rv , and no significant correlation between rainfall capacity and 130 . the soil conservation effects were better than the water conservation effects . the order of importance for water and soil conservation effects in different treatments was eragrostis curvula , kummerowia atriata , ixeris denticulata , with the most significantly positive correlation between each runoff and soil loss 与裸坡相比，严重侵蚀地上植物篱笆的保土效果比保水效果更明显，其中画眉草( eragrostiscurvula )水土保持能力最强，鸡眼草( kummerowiaatriata )次之，苦荬菜( ixerisdenticulata )只具有保土作用；同时每次降雨产生径流量与侵蚀量之间为极显著相关关系。
Mm5 adjoint - model assimilation system not only can improve the initial field effectively and promote the coordination with the model but also can enhance the forecast on the precipitation and other elements . the assimilation of cdw has an improvement on quality of upper wind . the effect of direct numerical simulation with utilizing the cdw to amend the initial field gains the advantage over the one not 结果表明， mm5伴随模式同化系统能有效改善初始场与模式的协调能力，提高模式对于降水场和其它要素场的预报；使用云导风资料修正初始场后直接模拟的效果比未使用时直接模拟的效果要好，对部分区域的强降水预报精度有一定程度的改善；使用伴随模式同化系统后，加入云导风资料的同化试验对其它要素的改善与直接同化常规资料的效果相比，改善优势不明显，但从各要素的误差来看，对于风场的改善最好。
The experimental results on seismic simulator verify that the mr damper in the passive off mode provided the information on the minimum effectiveness of the damper if the external power was cut off , in which the seismic responsesof the tall building and podiun structure were reduced . when the mr damper worked in the six kinds of semi - active logic control methods , the seismic responses of the two building were further reduced compared with those when the mr damper worked in the passive off mode 地震模拟振动台试验结果表明： mr阻尼器的passiveoff方式是外部电源被切断时的最低控制效果，能消除原结构地震反应的鞭梢效应，并使主楼和裙房的地震反应有一定的减少，六种半主动逻辑控制方法的减振效果比passiveoff方式更好，多mr阻尼器控制的效果优于单mr阻尼器。
Special - shaped column frame with ved , frd and f - ved are analyzed under minute earthquake and disastrous earthquake , which are compared to that of r . c . special - shaped column frame . the results indicates that the new system with ved , frd and f - ved can effectively reduced the seismic responses than special - shaped column frame ; and that it is more obvious for r . c 最后本文对设置ved 、 frd和f - ved的异型柱框架结构在水平地震作用下的反应进行了时程分析，通过与纯异型柱框架结构在同一地震作用下的时程曲线进行比较，得出以下结论： 1 )采用设置ved 、 frd和f - ved的异型柱框架消能减震结构体系可以有效减小地震反应； 2 )设置f - ved的异型柱框架结构的减震效果比设置ved或frd更明显。
