正电子

In what follows, we will emphasize the positron source design, manufacture and tests.

本文将着重介绍正电子源系统的设计、加工和测试。

This creates, as it were, electron and positron shadows.

这样也就有了电子和正电子的阴影。

The result is that the electron shadow and the positron shadow are separated.

结果将使得电子的阴影和正电子的阴影被分开。

objective to investigate the relationship between positron emission tomography and cognitive dsyfunction in patients with multiple sclerosis.

目的 探讨正电子发射体层成像与多发性硬化患者认知功能障碍的关系。

Positron imaging as a biomedical research technique and clinical diagnostic procedure has been widely used.

正电子成像作为一种生物医学研究技术和临床诊断手段已经得到了广泛的应用。

Positron was redesigned three times over the next three years.

正电子进行了重新设计，在未来3年的3倍。

This phenomenon occurs whenever the interaction is so strong as to cause transitions from electron states to positron states.

这现象发生在交互作用如此强以致引起从电子态到正电子转变的任何时候。

By now,some positron emission tomography and functional magnetic resonance imaging has been extensively used on PD research.

迄今为止，正电子发射断层扫描和功能磁共振成像已经广泛应用于PD的研究。

Positron annihilaton in high temperature superconductors has been studied.

研究了高温超导体中的正电子湮没信息。

And 15%, the positron average lifetime increases with the increasing strains.

形变量为2.5％-15％的样品中，测量结果显示正电子寿命随作形变量的增加而增加。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。