This paper expatiates the basis theory on pile driving monitoring technology of perstressed concret tube piles,and analysies the hammer\'s energy and the tension stresses and the compression stresses during the driving monitoring,and find the time effect coefficient and bearing capacity of a single pile by high strain dynamic testing to direct the pilling work.

Objective: To study the time-effect relationship of mice embryonic toxicity and teratogenicity induced by HCHO in vitro.

Whole-embryo culture was used as the model system to study the Time-effect relationship of formaldehyde on mouse embryonic development.

FEM analysis on time-effects of deep excavations;

Discussion on time-effect of cement soil piles and grading for their quality;

Dose-response and Time-effect between Ionizing Radiation(IR) and Histone H2AX Phosphorylation(γH2AX) of Tumor Cell;

Especially when drainage conditions of subsoil are poor,these time effects behave rather sustaining.

Under the action of the ground surcharges,field measurements for time effects of negative skin friction behaviors of three piles with different vertical loads on the pile top are adopted.