摘要：Nuclear safety is a global growing concern,where ionizing radiation(IR)is a major injury factor resulting in serious damage to *** detection of IR is usually conducted with physical dosimeters;however,biological IR detection methods are ***,a living composite hydrogel consisting of engineered bacteria and gelatin/sodium alginate was 3D-printed for the biological detection of *** strains of PrecA::egfp gene circuit-containing engineered Escherichia coli were constructed with IR-dependent fluorescence,and the DH5αstrain was finally selected due to its highest radiation response and *** bacteria were loaded in a series of gelatin/sodium alginate matrix hydrogels with different rheology,3D printability and bacterial applicability.A high-gelatin-content hydrogel containing 10%gelatin/1.25%sodium alginatewas *** optimal living composite hydrogelwas 3D-printedwith the special bioink,which reported significant green fluorescence underγ-ray *** living composite hydrogel provides a biological strategy for the detection of environmental ionizing radiation.

摘要：对双联行星轮齿间错位角以及在最小装配侧隙条件下的装配错位角偏差公式进行了推导;利用SolidWorks二次开发平台对带有齿间错位角的双联行星轮进行了参数化建模,并根据推导的装配公式进行了轮系装配的验证;本方法对2K-H行星轮系的实物装配具有较强的理论指导性和工程实用性。