查询词典 deceases

Results The amplitude of rabbit stomach in front-back direction rapidly increases after 5 Hz and reaches the peak of 277.5% input at about 8Hz and then deceases gradually. The resonance frequency is 7-9Hz. and the amplitude of vibration is higher than 150% of input amplitude from 6Hz to 10Hz. The resonance frequency reduces and the maximum amplitude increases with the increase of stomach mass and volume.

结果 在2~50Hz频率范围内家兔胃在前后方向的振动在5Hz后振幅迅速增大，在8Hz左右达峰值，达到施加振幅的277.5%，之后又逐渐减小；共振频率为7~9Hz，在6~10Hz频率范围内胃的振幅都超过了施加振幅的150%；随着胃的质量、体积的增大，胃共振频率变低，但最大振幅增大。

ABSTRACT In order to study the thermally activated characteristics of plastic deformation and the effect of alloying element on the thermal activation of structural steels, the properties of plastic deformation for 20g and 13Ni3CrMoV steels have been examined in the temperature of 77—473K and strain rate of 〓. The experimental phenomena show that the effective stress of plastic deformation decreases with the increase of alloying elements content (namely solute solution softening) and the frequency factor deceases with the increase of effective stress.

本文以13Ni3CrMoV钢焊接结构的动态断裂破坏为背景，通过系统测试20g和13Ni3CrMoV钢的动态屈服特性，分析比较了结构钢的形变热激活特点，从频率因子〓随有效应力σ〓增大而下降和合金固溶软化的实验现象出发，在位错以弯折方式克服晶格Peierls位垒的基础上，提出了溶质原子与螺型位错热激活弯折相互作用的物理模型和σ〓-T分段线性关系的形变热激活理论假设，并借助计算机数值模拟，分析探讨了合金固溶软化的微观机制。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。