The existence of a space charge field and its strong focusing properties are tested experimentally.
实验验证了空间电荷场的存在及其强聚焦特性。
The focusing properties of a space-charge lens depend on the size, shape and density distribution of its electron cloud.
空间电荷透镜的聚焦特性决定于其电子云的大小、形状和密度分布。
Using simple math deduction results in the focusing conditions of charge-particle flow in the distribution of magnetic fields.
运用较简明的数学推导，给出了在该磁场分布下带电粒子流聚焦的条件。
Therefore, under the current headmaster-in-charge system, focusing on the public schools, the writer tries to explore the school-based management model which is suitable for them.
据此，笔者以公立学校为研究对象，在我国现有外控式“校长负责制”管理体制下，探索适应公立小学的校本管理模式。
Shaped charge effect is broadly used in military arena and civil construction, because the focusing of the detonation products creates an intense localized force and decays slowly.
聚能效应能够显著提高能量密度，高效传递炸药爆炸能量，已被广泛应用于军事和民用领域。
Shaped charge effect is broadly used in military arena and civil construction, because the focusing of the detonation products creates an intense localized force and decays slowly.
聚能效应能够显著提高能量密度，高效传递炸药爆炸能量，已被广泛应用于军事和民用领域。
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