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基于西藏羊八井宇宙线观测站在2006年3月至2011年6月期间记录的近地大气电场数据, 分析研究了该地区近地晴天大气电场气象效应和时间变化特征. 气象效应分析结果显示, 该地区近地晴天大气电场与三个气象参量(大气压强、温度和相对湿度)的长时间变化趋势基本一致, 并有明显的季节效应. 冬春季, 大气电场强度整体水平相对较低, 约为0.14 kV/m; 夏秋季, 电场强度水平相对较高, 为0.18 kV/m左右. 近地晴天大气电场强度与大气温度间的线性相关性最强, 拟合相关系数达到0.89; 与大气压强和相对湿度间的线性相关性相对较弱, 拟合相关系数依次为0.43和0.53. 傅里叶分析结果表明: 晴天大气电场时间变化受太阳日周期、半太阳日周期及其三、四次谐波分量调制作用, 调制强度依次减弱. 西藏地区近地晴天大气电场日变化特征呈大陆简单型, 即双峰双谷. 主、次峰谷分别出现在白天和夜间, 主峰谷出现的早晚因季节不同略有差异, 次峰谷出现的早晚因季节不同差异相对较大. 相似文献
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结构电子的提出目前物体的带电理论是:当物体失去电子时该物体带有正电;当物体得到电子时该物体带有负电。在实际的应用中,人们对一个物体是否带电的判断,主要是检测该物体相对环境或参照物的相对电位或相对的带电状态,而不是真地去检测该物体内部质子和电子的数量。这意味着和大地电位相同而被定义为“不带电状态”的物体,其内部的质子和电子数量并不一定相等。以PN结中的P型半导体为例,在和大地的电位相同时,P型半导体内部的电子数量多于质子数图1量,这是由于掺杂技术改变了本征半导体原有的物质结构。 相似文献
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本文将介绍环球大气电路,首先介绍了大气中的离子,晴天大气电场,晴天大气电流等概念,进而引入电荷再生机制,-雷暴概念,并介绍了维持大气电荷平衡的几种主要电流机制最后给出全球大气电过程的球形电容器模型。 相似文献
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大气对激光传输的影响 总被引:4,自引:0,他引:4
本文分析了激光传输过程中大气这一传输介质对其的影响,由大气的成分出发,采用辐射传输理论描述了大气介质的吸收和散射特性,着重分析了其中对辐射影响最大的两种因素,即大气消光和大气湍流。并建立了大气传输系统的传递函数模型。最后通过LOWTRAN模拟软件包对本文所得的模型进行评估。 相似文献
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因为电场以高一的力学作为基础,而学生在高一学力学时就显得吃力,所以该知识点对学生而言综合性强、概念性强、更抽象,是高中物理的难点.静电场、恒定电场和涡旋电场在高中物理中都出现过,这里笔者做一个简单总结. 相似文献
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本文论述了大气湍流对自适应光学系统的影响,导出了水平光程上大气相干长度ro的测量式。介绍了所用的实验装置和得到的实验结果。 相似文献
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被极化的空气分子受到电场的作用具有向场强大的地方运动的趋势,另一方面,由于分子热运动的作用将破坏这种趋势,最终结果导致场强大的地方分子浓度高,场强弱的地方分子浓度低.但高压输电线附近的空气分子浓度比别处高吗?本文由玻尔兹曼分布律推导出电场中气体分子浓度随场强变化的公式,发现电场对空气分子浓度分布的影响非常微弱. 相似文献
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K. Maki 《Physics letters. A》1976,56(2):101-102
The effect of an electric field on the l? vector in the A phase of 3He is reexamined. The effect appears roughly by a factor 5 smaller than that predicted by Delrieu previously. 相似文献
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《Physica A》1988,153(1):114-128
The influence of an electric field on weak localization is studied by a recently proposed generalized quantum Langevin equation approach to the conductivity problem. A general formula for the memory function of the non-interacting electron gas, in the presence of high order impurity scattering and an arbitrary electric field, is derived. In the low field case, a scale and frequency dependent conductivity is obtained, which reduces to the well known scale dependent conductivity in the static limit. In the high field case, the conductivity is field dependent through the drift velocity. It is shown that the presence of strong electric fields tends to delocalize the one and two dimensional electron systems if one adopts the electron heating model. However, if the electron gas does not heat up, the conductivity will be field independent. 相似文献
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The effect of the external electric field on the spectral line shape under conditions of a uniform population of magnetic
sublevels is studied in the density matrix formalism. The line shapes of spontaneous radiation for the atomic 41P1-21S0, 43D1-23P0, 43S1-23P0, 43P1-23S1, 43D1-23P1, and 43S1-23P1 transitions ofHe are calculated. The electric field is shown to be responsible for the spectral line shape asymmetry.
Tomsk State University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 23–28, November, 1999. 相似文献
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A. Kiejna 《Solid State Communications》1984,50(4):349-352
The density functional formalism is used to study changes in the lattice relaxation induced by negative electric field at closed packed faces of Li, Na, Al and Cu. Due to the simple form of the parametrized density profile assumed, the calculation is performed analytically. For the typical fields applied in field emission the calculated relaxations can be increased up to 21% due to the electric field, depending on metal and crystallographic plane considered. 相似文献
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Investigations are aimed at a search for and an estimation of a correlation between the electric field in the atmospheric
boundary layer (ABL) and the lunar tides. The lunar tides and their correlation with the electric field in the ABL can be
studied either by accumulation of a large experimental data arrays or by the method of signal reception at spatially separated
points. The problem of investigating lunar tide manifestations in the electric field in the ABL is solved using a network
of stations for monitoring the vertical electric field strength component, specially constructed models and their consequences,
and procedures developed for experimental data processing. 相似文献