From the practical effect , this production has low net cost , but it has good performance . the system of this instrument is flexile and it can be expanded 从系统软硬件设计到实际使用效果来看，本系统具有体积小、易于携带、界面友好、使用方便、易于调试、抗干扰能力强的优点，而且成本不高，具有优良的性价比。
2.
Environment of modern in - situ vibration measurement has become more complex , measurement points increased and the measurement range widened greatly with the coming forth of long , large , tall and flexile structures 随着长大高柔结构建筑的不断涌现，现代振动测试现场环境更为复杂、测点布设数量更多、测点分布范围更广。
3.
The paper is based on the construction of the express - highway between yiyang and changde in hunan province , aiming at enhancing the serviceability of cement concrete pavement , probing into the structural assemblage of the cement concrete pavement , the roadway drainage system , contraction joint with the dowel bar and precaution of bumping at the end of the abutment . it presents some achievements of the research , including more reasonable structural assemblage and roadway drainage system , the method of setting dowelled bar in contraction joint , putting forward the concept of stage - transition from rigid to flexile behind abutment 本文以湖南省益阳至常德高速公路项目为依托，以提高水泥混凝土路面使用性能为目标，就水泥混凝土路面结构组合、路面排水系统、缩缝设置传力杆、桥头跳车问题的防治等方面开展研究和工程实践，取得了丰富的研究成果，如研究采用了更合理的路面结构组合，设置了较完善的路面排水系统，在国内高速公路上率先全面采用缩缝加传力杆技术，对所有桥涵构造物台背全部采用刚柔过渡技术处理桥头跳车问题等。
