质子的

Among of them, Radio-frequency ion source is in most wide used for the reasons of its high proton content, long life and reliable performance, etc.

其中，高频离子源以其很高的质子比（70％-90％）、长寿命和可靠的性能而得到了最广泛的应用。

Physical reality can be seen as grounded in the numerical values of a handful of dimensionless constants, the best known of which are the fine structure constant and the ratio of the rest mass of the proton to the electron.

自然实在被视为基于少数无量纲常数的数值，其中最有名的常数是"精细结构常数"和"质子与电子静止质量的比率"。

Accurate measurements of an intense high-energy proton beam are generally disturbed by high energy proton induced secondary electron emission.

高能质子入射到金属接收体表面诱发的二次电子直接影响束流强度的测量精度，如何消除二次电子影响是实现束流高精度测量的关键。

The contents of metal elements in silk gland and silk fiber of B . mori silkworm have been detailedly analyzed by proton induced X-ray emission, inductively coupled plasma mass spectroscopy and atomic adsorption spectroscopy.

用不同的测试方法，即质子诱导X射线发射、电感耦合等离子体质谱和原子吸收光谱对桑蚕丝腺体和丝纤维中金属元素的含量进行了详细的表征。

The contents of metal elements in silk gland and silk fiber of B. mori silkworm have been detailedly analyzed by proton induced X-ray emission, inductively coupled plasma mass spectroscopy and atomic adsorption spectroscopy.

摘要用不同的测试方法，即质子诱导X射线发射、电感耦合等离子体质谱和原子吸收光谱对桑蚕丝腺体和丝纤维中金属元素的含量进行了详细的表征。

The technical challenge is encountered when water in proton exchange fuel cells freeze s at sub-zero temperature.

针对在低于0℃的环境中，质子交换膜燃料电池中的结冰问题，提出了燃料电池0℃以下保存和启动的技术难题。

In this paper, the effects of different catalyst combinations on the synthesis of α-chloro-dodecanoic acid were investigated, in which a series of acyl chlorides such as 4-toluene sulfonyl chloride, dodecanoyl chloride, chlorosulphonic acid , etc.

本文从烯酮式反应机理出发，以α-氯代十二酸的合成为模型，对酰氯化试剂(对甲苯磺酰氯、十二酰氯、氯磺酸等)和质子酸催化剂(如H型离子交换树脂、氯磺酸、对甲苯磺酸、醋酸等)进行组合和选择，并与文献报道的特殊添加剂乙酐比较，研究不同催化体系在酸催化合成α-氯代脂肪酸时的催化作用。

The systems of injection and slow extraction for a small protontherapy synchrotron are studied in this thesis.

本论文的主要工作是小型医用质子同步加速器的注入和引出系统的研究及设计。

It indicates that electrical conduction ofα- andβ-phases is not caused by transport of protons bounded at Mg tetrahedral position.

这表明镁橄榄石的导电可能不是由镁离子位置上的质子移动引起的。

Our current theory of elementary particles and forces, known as the Standard Model of particle physics, has achieved a unification of electromagnetism with the weak interactions, the forces responsible for the change of neutrons and protons into each other in radioactive processes and in the stars.

最近的关于基本粒子和力的理论，就是在粒子物理里面叫"标准模型"的，已经将电磁力和弱相互作用统一起来。弱相互作用可以使质子和中子在放射过程和星球内部发上相互转变。

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％。