Practices show that the compressive strength , the modulus of elasticity , the permeability coefficient and the compactness of concrete obtained respectively by the compaction method , the unconfined compression static compaction method , the sand trenching and filling method , and nuclear densimeters meet the requirement of design , and the mixing proportion of concrete of the side - wall is reasonable 实践证明施工中用击实法、无侧限抗压静力压实法、挖坑灌砂法及核子密度仪分别检测出的边墙混凝土抗压强度、弹性模量、渗透系数和密实度值均满足设计要求，边墙混凝土配合比合理。
Therefore , in addition to the measurement of dissolved solid concentrations obtained through online densimeter , transmittance measurements should be performed to provide online data about the second moment of csd ( crystal size distribution ) . in this thesis , a light sensitive resistor served as the light / electricity conversion component was used to measure the transmittance 为解决动力学研究中所涉及的固相信息实时测定问题，根据模型需在线检测结晶过程中溶液透光率，本文以光敏电阻作为光电检测元件，构建了一双光路检测系统，有效地提高了测定系统的稳定性。
