| 1. | Surface gap spark plug 沿面间隙火花塞 |
| 2. | This is important to conduct the surface treatment of material for a better flashover performance . 5 这对于指导如何对材料进行表面处理以提高材料沿面闪络特性具有重要意义。 |
| 3. | In this paper , the non - symmetric planar aligned nlc cell with weak anchoring has been mainly investigated . the primary contents are stated as follows . 1 本文以弱锚定不对称沿面校列向列液晶盒作为研究对象,主要的内容包括以下几个主要方面: 1 |
| 4. | The flexoelectric effect will arise when an external uniform electric field is applied in the plane of slab and the director of liquid crystal will also generate a very small transformation 沿面外加一匀强电场,将会产生挠曲电效应,使得液晶指向矢分布发生了一个很小的变化。 |
| 5. | The flashover performance of alumina ceramics can be evaluated based on the above results , and it is helpful for choosing a proper material used in vacuum insulation system . 4 本研究结果为评价材料在真空中的沿面闪络性能提供了一个参考标准,对正确选择真空用陶瓷绝缘材料有重要意义。 |
| 6. | The anchoring energy takes the modified rapini - papoular expression , and the planar alignment nlc cell under external magnetic field will be studied . the fundamental formula and the boundary condition of 6 are deduced analytically 锚定能采用修正后的rp公式,用解析的方法详细研究了外磁场作用下沿面校列向列液晶盒。 |
| 7. | It has also been found that the pre - flashover events and the charging characteristic are related to the flashover performance , the samples with seldom pre - flashover events and lower charging ability show a better flashover performance 通过研究发现,对于同组分的陶瓷材料来说,如果材料的晶粒越小,分布越均匀,缺陷越少,则该材料的沿面闪络电压就越高。 |
| 8. | The main works and conclusions in this paper are as follows : make three kinds of models and corresponding electrode system to simulate corona discharge , surface discharge and cavity discharge . in double shielding room , a large number of experiments were done on these models . lots of experimental data were obtained 本文的主要工作和结论如下:制作了电晕放电模型、气隙放电模型、沿面放电模型和相应电极,在实验室中模拟空气中电晕放电、油中电晕放电、固体绝缘内气隙放电、空气中沿面放电和油中沿面放电这五种绝缘缺陷。 |
| 9. | A new model for the growth stage of surface flashover has been developed according to the experimental results , which is based on the solid band theory . it is suggested that the electron multiplication could be attributed to two processes : one is the secondary electron emission avalanche caused by collisional ionization , the other is the micro - discharge caused by the trap centers of insulator . the trap cente 电子倍增的过程与材料的表面态直接相关,材料微观结构的变化和材料的表面处理都能够导致材料表面态的变化,引起材料的表面二次电子发射系数以及材料中陷阶密度和分布的改变,从而影响了电子倍增的过程,并进一步改变或影响了沿面闪络的发展过程。 |
| 10. | Surface flashover across the insulators in vacuum is the major limitation of the performance of the high power system , such as high power microwave tube , pulse power switch , high - energy linear accelerator , etc . flashover studies are of considerable importance in many applications . alumina ceramics are used widely in vacuum insulation system . the flashover and charging performance have been systematically investigated on alumina ceramics in vacuum under pulse voltage ( 0 . 7 / 4 ^ 8 ) 真空中绝缘子沿面闪络现象是制约高功率微波管、脉冲功率开关、高能粒子加速器等系统性能的主要原因,这是因为真空中绝缘子在一个比自身及相同真空间隙击穿电场低得多的电场下就发生了表面闪络的缘故,研究真空中绝缘子沿面闪络现象及其形成机理对于改善和提高系统性能有重要意义。 |