等级相关系数

Methods The routine MR imaging was performed on 114 intradural extramedullary tumors with a 1.0 Tesla MR unit.Rank correlation and regression coefficent were analyzed for MR characteristics of neurilemmomas、neurofibromas and meningiomas.Dynamic spin-echo MR imaging was performed on 23 cases types of contrast enhancement ratio-time curves were analyzed.

使用1.0 Tesla MRI系统(Magnetom Impact，Siemens)对114例髓外硬膜下肿瘤进行常规扫描，对常见肿瘤(神经鞘瘤、神经纤维瘤、脊膜瘤)的MRI征象进行等级相关和回归系数分析，同时对23例肿瘤进行SE(200/15)序列动态增强扫描，分析CER-T曲线类型。

The correlation between pilling grade assessed by Bp network and that by skilled person is 0.97, and the evaluation correctness is 92%.

Bp网络评定结果与主观评定结果的相关系数是0.97，等级评定的正确率是92％；自组织神经网络的评定结果与主观评定结果的相关系数是0.95，等级评定的正确率是84％。

Then, safety analysis method was constituted considered the typical damage of concrete beam bridge. 5. By amending the reduction rate of loading capacity used in Code for Maintenance of Highway Bridges and Culvers (JTG H11-2004), a new reliable index is presented in the same safety standard to reflect the relation between load and resistance. According to the basic principal of calibration method, the recommended gradation index was computed under various factors such as different load combinations, vehicle operating status and different failure modes. With these calculated numerical values, the calculated reliability indexes standard for the estimation of safety degree of in-service concrete girder bridge members was ultimately obtained.6. Based on the related standards and results on crack and displacement that cannot continue to loading at home and abroad, the evaluation grade of the concrete beam bridge is proposed by analogy.

针对材料和构件损伤对混凝土梁式桥抗力的影响，基于材料和构件层次典型损伤的修正计算公式，在结构既有以及时变抗力评估的概率模型基础上，通过误差传递公式获得抗力统计参数，对抗力进行修正，构成了考虑混凝土梁式桥典型损伤的安全性分析方法。5、依据校准法原理，将《公路桥涵养护规范》(JTG H11-2004)中不同类别承载力下降率转化为修改分项系数，分别计算了轴心受压、轴心受拉、受弯、大偏心受压、受剪构件在各种情况下的可靠指标，根据破坏类型对校准结果进行分析，提出了基于可靠度的公路混凝土梁式桥安全性评定等级。6、基于不能继续承载的裂缝和位移的相关国内外规范和研究成果分析，通过类比提出了混凝土梁式桥不能继续承载的裂缝和位移评定等级界限。

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。