| 1. | Study on change law of resistance of flg in fatigue process of composite laminates
复合材料层板疲劳过程中疲劳寿命计的电阻变化规律研究 |
| 2. | Wavelet analysis of electrically evoked surface electromyography signals during muscle fatigue
肌肉疲劳过程中电诱发表面肌电信号的小波分析 |
| 3. | The change of elastic constant of steel 20 in low - cycle fatigue procedure measured by ultrasonic
用超声波法测试20钢低周疲劳过程中弹性常数的变化 |
| 4. | 5 % . due to the instability of gh4145 / sq in the total cyclic course , we study the oscillation of fatigue factors regarding different life stage for the first time
针对gh4145 / sq合金在整个疲劳过程中的不稳定行为，本文对不同疲劳寿命阶段的疲劳特性参数进行了研究。 |
| 5. | It is , therefore , of academical and practical importance to investigate and to clarify the electrical fatigue mechanism of ferroelectrics by using on - line or in - situ technologies
采用现场或原位技术观测电疲劳过程中电畴的变化对研究和探明这类材料的电疲劳机理具有重大的理论指导意义和实际应用价值。 |
| 6. | This work was initiated to establish an in - situ xrd measuring system through which the variations of xrd peak intensities on the surfaces of plzt ferroelectrics with fatigue numbers during an electric process can be in - situ observed
本工作通过建立原位xrd观测系统，对电疲劳过程中plzt铁电陶瓷试样表面x射线衍射峰随疲劳次数的变化进行了原位观测。 |
| 7. | According to the dynamic evolvement rules of the stress , strain and fracture distribution or fatigue cracking mechanism , fatigue equation and axle load conversion of the steel bridge deck asphalt mixture surfacing are proposed
依据钢桥面沥青混合料铺装体系复合结构的应力场、应变场和损伤场在疲劳过程中的动态演变规律以及疲劳裂缝的形成机理，推导出钢桥面沥青铺装层疲劳性能方程和车辆轴载换算公式。 |
| 8. | These spectral changes are generally attributed to a progressive decrease in muscle fiber conduction velocity with the accumulation of h + in muscle in the development of muscle fatigue . however , there are a few other experimental studies revealed it was not all
长期以来，人们倾向认为在肌肉疲劳过程中semg信号功率谱左移可能与h ~ +积累诱发肌纤维动作电位传导速度下降有关，但有研究提示此结论并不可靠。 |
| 9. | The in - situ xrd results obtained during an electric fatigue process revealed that the numbers of a domain kept increasing , while those of c domain decreasing with the increase of the fatigue number ( n ) after the end of each fatigue cycle
电疲劳过程中原位xrd观测结果表明，随着电疲劳次数n的增加，在每个循环结束后试样表面a畴不断增加， c畴不断减少；在外电场作用下该材料发生a c畴的90畴变的能力不断恶化。 |
| 10. | Based on the study of strength degradation of material in the fatigue process , a strength degradation model is proposed . a stochastic differential equation , which controls strength degradation , is obtained from the model randomized by markov process . by using the theory of stochastic , the distributions of residual strength at any given lifetime and lifetime of any given residual strength are attained . under a few suitable hypotheses , inverse gaussian distribution of fatigue life is derived , and verified by means of experimental data . the result shows that the model and the method are reasonable
在研究疲劳过程中材料强度退化规律的基础上,建立了一个强度退化模型.对其进行随机化处理,得到控制强度退化过程的随机微分方程.在一定假设条件下,获得了剩余强度概率密度函数的封闭解,并推导出疲劳寿命的反高斯分布形式.给出一种考虑损伤状态对随机涨落影响的近似处理方法.与试验数据的比较结果表明,本文的模型和方法是合理的 |
