| 1. | Sif stress intensity factor 应力强度系数 |
| 2. | A numerical method for determination of multiple stress singularities and corresponding stress intensity coefficients 多重应力奇异性及其强度系数的数值分析方法 |
| 3. | A numerical method for determination of oscillatory stress singularities and corresponding stress intensity coefficients 振荡应力奇异性及其强度系数的数值分析方法 |
| 4. | To increase the intension coefficient , and speed up the significant evolutionary , the increases probability of arriving vector optimization is given 因此提出增加正负进化对的进化强度系数思想,以提高算法的运行速度,增加向最优点进化的概率。 |
| 5. | Since to generate positive or negative evolutionary individual pair without intension coefficient , it is showed that the effective evolutionary individual pair of the compact genetic algorithm can decrease 通过研究发现紧致遗传算法运行时,由于正负进化对的出现,不具有强度系数,导致有效进化的减少。 |
| 6. | The results show that all the orders of the stress singularities at the interface edge can be determined precisely , and the related stress intenisity coefficients can also be determined by extrapolation method 计算结果表明,本方法可以精确地求得振荡应力奇异性次数,并且与奇异性对应的复应力强度系数也可以很方便地应用外插法得到。 |
| 7. | Through the description of limit equilibrium state and slope stability analysis by strength reduction fem , the safety factor is got , at the same time , the critical failure surface is found automatically . these conclusions testified that this method is practicable if there are detailed investigation , reasonable model and favorable software 通过与传统稳定性计算成果的对比分析,表明:只要调查充分,模型合理,加上良好的计算分析程序,对非贯通性节理岩体高边坡的稳定性评价,有限元强度系数折减法是确切可行的。 |
| 8. | In this instance the structures of speed - loop and position - loop linear controller are identical with those of the linear double - loop system , and the position - loop fuzzy controller is non - quantificational and its factor is self - tuning . in addition the transition of the two controllers of the position - loop is smoothed by using the output intensity coefficients 模糊?线性双模控制的速度环以及位置环的线性控制器结构都与线性双闭环控制的相同,位置环的模糊控制器为修正因子自调整无量化模糊控制器,利用输出强度系数实现两种控制的平滑过渡。 |
| 9. | The paper introduces the fundamentals of the temperature distribution in the borehole drilled in the frozen formation , and discusses the ascertainment of these parameters , including the mass quantity of circulation medium , the coefficient of thermal conductivity of drilling rods , the coefficient of the intensity of heat exchange and the coefficient of unstable heat exchange between the rock and the circulation medium , and the rising of the temperature of the circulation medium in the bottom of the bore 摘要介绍了冻土钻孔内温度分布研究的理论基础,其中主要讨论了冲洗介质的质量流量、钻杆杆壁的导热系数、岩石同冲洗介质的热交换强度系数与不稳定热交换系数,以及孔底冲洗介质温度升高值的确定。 |
| 10. | Fatigue strength coefficient decreases linearly during the cyclic course ; fatigue strength exponent increases ; fatigue ductility coefficient first goes up till the maximum value at 50 % total life , and then goes down ; fatigue ductility exponent decreases during the first half cycle till its minimum value at 50 % total life and then increases in the rest cycle course ; cycle strength coefficient and cycle strain hardening exponent both decrease during the total cycle course 结果表明: 6个基本疲劳特性参数在循环过程中都呈显出规律性变化。疲劳强度系数呈线性减小趋势;疲劳强度指数呈线性增大特征;疲劳延性系数是一个先增后降的过程;而疲劳延性指数随循环进行由初始减小到逐渐增大;循环强度系数和循环应变硬化指数在整个循环过程中都趋于减小。 |