查询词典 X-unit

Objective To analyze X-ray characteristics of synovitis of knee joint and suggest a simple diagnostic method.

提 要：目的分析滑膜炎的X线特征，提出简便准确的X线诊断方法。

Probe into theory of X-ray diffraction testing residual stress in glass-ceramic and effect on accuracy of stress with the X-ray diffraction.

探讨了X射线法测量微晶玻璃残余应力的原理及该方法对残余应力值精确度的影响。

Firstly, this paper describes the hardware system of the X-ray thickness gauge, explains the composition and principle of every hardware part, including five parts: emission device, reception device, mechanically-driven structure, control system and operation terminal.

本文详细介绍应用在双向拉伸薄膜生产线上的X射线测厚仪的研制和设计过程。主要从三个方面对研制和设计作了详细介绍。首先从X射线测厚仪的硬件结构进行描述，阐明各个硬件的组成和原理，并着重介绍了在设计中各个硬件的类型和功能实现。

A recent survey showed that X percent ofrespondents ranked getting rich as their top priority , compared toX percent only a few years ago .

最近的一项调查表明，X%的调查对象把致富作为他们的首选，相比之下，就在几年前，只有X%的人这样想。

If the graph Xhas no isolated vertice ,its full autmorphism group AutX acts transitively on arc set ,we say that X is arc-transtive or symmetric .

如果X没有孤立点，AutX传递作用在弧集合上，我们说X是弧传递的或对称的。

In the first part, it was investigated the interaction between Pb2+ and La4Ti9O24 ceramic bulk. The result shows that a significant Pb2+ diffusion into La4Ti9O24 ceramic bulk and a significant crystallization of the La2/3TiO3-type phase is clearly observed in the Pb2+ diffusion layer. The reacted zone consists of the La2/3TiO3-type phase exhibits the linear dependence of the square of the thickness, x, on the heat-treated time, t, in excellent agreement with the parabolic law x2 = kt, where k is the growth rate coefficient. The kinetic study thus indicates that the Pb2+/La4Ti9O24 interaction strictly obeys the theory of the reactive diffusion. Furthermore, the experimental k values were used to determine the associated activation energy, Ea, for the formation of La2/3TiO3-type phase using the Arrhenius plot and the following least-square equation, ln =-Ea/RT + A, where T is the annealing temperature, R is the universal gas constant, and A is a constant, resulting in Ea ~ 607 ?b 60 kJ/mol.

首先， 以巨观的方式观察PbO与La4Ti9O24陶瓷体介面的反应现象；利用X-ray绕射分析以及扫描式电子显微镜来观察不同的热处理温度以及不同的持温时间所制作的样品，研究结果发现， Pb2+离子会渗入到La4Ti9O24陶瓷内，同时在Pb2+离子所渗入的区域内会产生新的La2/3TiO3-type钙钛矿斜方晶相；藉由量测不同温度与时间之样品，其因Pb2+离子渗入而产生之La2/3TiO3-type相层厚度之关系，符合反应式扩散机制中 x2 = kt 之关系式(其中 x：扩散层厚度； k：反应速率常数； t：反应时间)；进一步将不同实验条件所得到之反应速率常数值代入Arrhenius方程式ln (k =-Ea/RT + A ，其中Ea：活化能； T：绝对温度； R：气体反应常数； A：常数，可以求得Pb2+离子与La4Ti9O24陶瓷发生反应式扩散所需之活化能为607 ± 60 kJ/mol。

Vertebral column ; injury ; radiolgraphy ; tomography ; X-ray computed ; magnetic resonance imaging

脊柱；创伤； X线摄影术；断层摄影； X线计算机；磁共振成像

ABSTRACT Amorphization of Cu-Zr system by mechanical alloying of elemental Cu and Zr powder mixtures (30-65at% Cu) and mechanical grinding of the alloys with Cu concentration ranging from 59 to 75at% have been extensively investigated. The structural changes, crystallization behavior as well as atomic short range ordering were followed by differential scanning calorimetry , X-ray diffractometry and nuclear magnetic resonance spectroscopy .

本文采用多种技术系统地研究了球磨Cu和Zr混合粉末制备的Cu〓Zr〓（x=30，33，40，50，55，59，65）非晶合金的形成过程和球磨金属间化合物得到的Cu〓Zr〓（x=59，65，70，75）非晶合金的形成过程，比较了它们形成过程的异同，同时研究了球磨形成的非晶合金的晶化行为以及原子短程有序结构，并与急冷非晶合金作了详细的比较。

Scientists can layer on the unique isuals of patients, such as magnetic resonance images, CAT scans and X-Rays, giing physicians high-resolution iews of the inner workings of the body while it appears to float within arm's reach.

科学家能够提供独一无二的患者影像，如磁共振影像、计算机辅助x线断层摄影术X线。医生能够得到高分辨率的机体内部功能状况，图象真实得就像是触手可及一样。

Now some of these may be on the X chromosome,.

现在其中一些也许存在于其体内的 X 染色体上。妇女的第二个 X 染色体可以补偿。

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。