查询词典 positron

Imaging of SERT with positron emission tomography and single photon emission computed tomography in humans can provide an important tool for understanding the relationship of psychiatric disorders and the alterations in SERT density, as well as to monitor the treatment of mental patients.

SERT的正电子发射断层和单光子发射断层活体显像剂有助于研究该系统的变化与精神紊乱疾病的关系，以及精神紊乱病人疗效的监测。

Because the experiences lasted around 17 seconds, they were able to perform positron emission tomography scanning in a placebo-controlled way and locate the activation to the temporoparietal junction, or more specifically, the angular–supramarginal gyrus junction and the superior temporal gyrus–sulcus on the right side.

因为这个经验大约持续17秒钟，他们能够在安慰剂控制的情况下进行正子摄影扫描，且定位到颞顶叶交界处的活化、或是更仔细地说，是角回与缘上回之间交界处，以及上颞回与右侧上颞沟；在右侧契前叶与后视丘在刺激之下也可以看到活化，会延展到小脑上蚓部。

Because the experiences lasted around 17 seconds, they were able to perform positron emission tomography scanning in a placebo-controlled way and locate the activation to the temporoparietal junction, or more specifically, the angular supramarginal gyrus junction and the superior temporal gyrus sulcus on the right side.

因为这个经验大约持续17秒钟，他们能够在安慰剂控制的情况下进行正子摄影扫描，且定位到颞顶叶交界处的活化、或是更仔细地说，是角回与缘上回之间交界处，以及上颞回与右侧上颞沟；在右侧契叶与后视丘在刺激之下也可以看到活化，会延展到小脑上蚓部。

The dispersion relations of superluminal waves for the longitudinal collective modes in unmagnetized, collisionless and homogeneous relativistic electron-positron plasmas are derived.

导出了无磁化无碰撞各向同性相对论正负电子对等离子体纵波的色散关系。

An introduction is given to the ambiguity function of the transmitted waveform, based on which the resolution and the principles for waveform design are analyzed. Combined with bistatic radar, the velation between the resolution and the target positron is discussed.

推导了该雷达发射信号的模糊函数，分析了影响其距离和速度分辨率的因素以及波形参数选取原则，结合双基地雷达的特点，给出了模糊函数与目标位置的关系。

The key of this technology depended on increasing batteries positron electrode -- zincous -- the electron that can carry.

这项技术的重点在于增加了电池正电子电极——阳极——所能携带的电子。

In positron emission tomography , or PET, a patient ingests or is injected with a slightly radioactive substance that emits positrons, which can be monitored as the substance moves through the body.

在正电子发射X射线摄影技术中，病人要咽下或被注射一些有少许放射性的物质来发出正电子。当这些物质在人体内运动时，正电子可被监测到。

In the BEPC electron positron storage ring, the bunch length and its lengthening are quite important characters. It determines the efficiency of getting physical events and the luminosities achievable, and it plays a key role in the upgrade of BEPC.

在北京正负电子对撞机中，正负电子束团的长度及其拉伸是束流性能重要指标之一，它直接影响到物理实验的效率，对BEPC的改进和性能进一步提高也起着关键的作用。

July 1, 2009 — The frequency of futile thoracotomies is reduced by use of combined positron-emission tomography and computed tomography compared with conventional staging in patients with non–small-cell lung cancer, according to a new study.

July 1， 2009 —根据一篇新研究，相较於非小细胞肺癌的传统分期，併用正子放射断层造影术与电脑断层可以降低无效的胸廓切开术频率。

An atom of antihydrogen, for instance, is composed of a negatively-charged antiproton being orbited by a positively-charged positron.

举例来说，一个反氢原子，由带正电荷的正电子围绕带负电荷轨道运行的反质子组成。

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％。