| 1. | Study of bone mineral density measuring system with quantitative ct
骨矿密度测量系统的研制 |
| 2. | Density measuring instrument
密度计量器具 |
| 3. | Density measuring equipment
密度测量装置 |
| 4. | Density measuring method
密度测量方法 |
| 5. | The result of experi ment is the percentage density measuring accuracy can reach 0 . 1 %
实验结果得出，百分浓度的测量可精确到0 . 1 % 。 |
| 6. | The relative difference between values of dry density measured by wave velocity method and pir replacement method is in the range of 1 %
根据相关方程由实测波速推测压实干密度值，相对试坑置换法的实测值，误差在1 %范围内。 |
| 7. | In this paper , the analyzing methods are introduced in contact materials of copper and chromium alloy , which include determination of oxygen and nitrogen , metanlurgic analysis , chemical composition and density measuring
摘要对铜铬触头材料进行氧氮含量测定、金相分析、化学成分和密度测定，形成一套较为系统的分析方法。 |
| 8. | Professor lau concluded that osteoporosis is a major and neglected disorder in chinese men . we recommend all men who are 65 years and older , and who have one of the above characteristics to have their bone density measured by dual x - ray densitometry .
刘教授指出，骨质疏松在华裔男性是一个严重但被忽略的疾病，我们建议六十五岁以上的男士如果有上述其中一个问题，就应该进行双能量x光骨质密度素描。 |
| 9. | In the same time we also use it to test the power of dc crossover . in this algorithm every element in the population a domination count is defined together with a neighborhood density measure based on a sharing function . those two parameters are then non - linear combined in order to define the individual ' s fitness
算法通过计算种群中pareto优于某个个体的个体数目以及个体所在位置的密集度来定义适应度函数，多个算例的测试结果表明该算法结合错位交叉算子具有较好的性能，能够使算法收敛到pareto概念下的比较均匀的一组非劣最优解。 |
| 10. | Combing with d _ ( 33 ) test and density measure , the composition , structure and properties of the pmn - pt ceramics have been studied systematically by means of macro - quantity chemical analysis , x - ray diffraction ( xrd ) , scanning electron microscope ( sem ) , differential thermal analysis ( dta ) and thermogravimetric analysis ( tga )
利用常量化学分析法、 xrd 、 sem和dta tga等分析测试技术，结合pmn - pt陶瓷密度和压电等性能的测试，对材料组分、结构与性能特征进行系统研究。 |
