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地电荷的电容结构发电机制研究
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作者 袁立新 《吉林师范大学学报(自然科学版)》 2012年第1期103-111,共9页
由地电荷与地球自转运动发电原理及国际参考地磁场(IGRF)标准模型所确定的地球磁场能量的分布,经分析、推论,建立了地电荷的电容结构发电机制,并由此而建立了全球电磁场结构和等效电路.此电磁场发电机制由磁场和电路双正交结构组成,磁... 由地电荷与地球自转运动发电原理及国际参考地磁场(IGRF)标准模型所确定的地球磁场能量的分布,经分析、推论,建立了地电荷的电容结构发电机制,并由此而建立了全球电磁场结构和等效电路.此电磁场发电机制由磁场和电路双正交结构组成,磁场正交结构为偶极子场和非偶极子场,电路正交结构为地电荷运动的等效发电环电流和电源及负载电阻组成的全球等效电路.电荷运动的等效发电环电流产生的是偶极子场;电源及负载电阻组成的全球等效电路产生的是非偶极子场.地电荷的电容结构发电机制所确定的地磁场结构模型,与现地磁场结构模型完全不同,特别是极区拱形地磁场及其双向地磁场边界特性.此模型对极光、极光椭圆区、极区双向电集流和极区离子上行,对大气电场、大地自然电位的形成和变化趋势,对行星际磁场BZ及其南、北分量BS和BN的生成,及行星际南向分量BS与磁暴的关系,以及对地震与偶极子场、非偶极子场之间的关系等,都作出了较合理的阐释. 展开更多
关键词 地电荷的电容结构 电机制 全球等效电路 地磁场和电路双正交结构 拱形及双向地磁场边界 极光 偶极子场 非偶极子场
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Change in Sediment Load of the Yangtze River after Wenchuan Earthquake 被引量:1
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作者 CHENG Genwei HE Xiubin +1 位作者 CHEN Guirong TAO Heping 《Journal of Mountain Science》 SCIE CSCD 2010年第1期100-104,共5页
On May 12, 2008, an earthquake of 8.0 magnitude on the Richter scale and its numerous aftershocks devastatingly hit Wenchuan County and its nearby region along the Longman Mountains in Sichuan Province, China. The hea... On May 12, 2008, an earthquake of 8.0 magnitude on the Richter scale and its numerous aftershocks devastatingly hit Wenchuan County and its nearby region along the Longman Mountains in Sichuan Province, China. The heavy ruined area was up to 30,000km2 and 13% of its land surface was denuded by the extremely terrible quakes. The mountain collapses, landslides and debris flows induced by the earthquake not only scared the landscape at the immense scale, but also poured L66-billion-m3 sediment combined with offscourings and rubble into the Yangtze River and its breaches. This amount of sediments is 3 times more than the normal amount discharged into the Yangtze River, and will significantly increase sediment transportation of rivers and decrease storage capacities of reservoirs downstream. The dramatic increase in sediment load will imperil the engineering safety and impact the operation of the giant Three-Gorge Hydro-power Station if no proper prevention measures are taken. 展开更多
关键词 Wenchuan earthquake sediment load the Yangtze River
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Long Time Series Observations from Antarctica with the International Concordia Explorer Telescope (ICE-T)
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作者 Igor Di Varano 《Journal of Physical Science and Application》 2013年第1期33-37,共5页
The Intemational Concordia explorer telescope (ICE-T) is a f/1.1 Schmidt telescope, 61 cm aperture, with two optical tubes equipped with identical charged coupled devices 10.3× 10.3 k, 9μ pixel size, ultra-wi... The Intemational Concordia explorer telescope (ICE-T) is a f/1.1 Schmidt telescope, 61 cm aperture, with two optical tubes equipped with identical charged coupled devices 10.3× 10.3 k, 9μ pixel size, ultra-wide-fieldwith a total FOV of 65 square degrees. Its aim is to operate at Dome C, the French-Italian Antarctic Station, taking advantage of the long winter night for continuous observations. It is optimized for high precision photometry in two separate filters Sloan g and Sloan i ranging from 100 mmag to 10 mmag (from 9 to16 mag). Among the scientific tasks there are the detection of hot Jupiters and Super Earths with the transit method, and related magnetic activity of the hosting stars. The 4m Radom dome for ICE-T together with 3 foundation pillars and the cables bundle have been already successfully installed in January 2009. 展开更多
关键词 Instrumentation for astronomy ANTARCTICA design in extreme environment.
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Electromagnetic Environmental Impact of 500-kV Double -Circuit Transmission Lines
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作者 Qi Jianzhao, Zhang Guohua, Wu Xiaoyan Hebei Electric Power Design & Research Institute Zhang Jianping 《Electricity》 2011年第1期24-28,共5页
The strength of the power frequency electric intensity and magnetic field of the 500-kV double circuit transmission lines was calculated by using the equivalent charge method and the Ampere's Law, and the environm... The strength of the power frequency electric intensity and magnetic field of the 500-kV double circuit transmission lines was calculated by using the equivalent charge method and the Ampere's Law, and the environmental impact factors of the fields were evaluated. By optimizing the phase sequence, the frequency electric intensity and magnetic field strength can be reduced. Within a distance of 25 m from the center of the transmission line, the power frequency electric intensity and magnetic field strength fall off sharply with the distance increase. Finally, the best phase sequence and the minimum ground clearance of the transmission lines were obtained to meet the requirements of the least impact on envionment. 展开更多
关键词 transmission line frequency electric field intensity frequency magnetic field strength
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地球电磁场系统构成和运行机制 被引量:3
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作者 袁立新 《吉林师范大学学报(自然科学版)》 2010年第4期135-142,共8页
地球电磁场是一个大系统,其构成物理要素有:引力常数减小条件下核素放射性衰变所产生的地电荷、地球的旋转运动、地磁场、太阳黑子活动、磁暴、大气电场和雷电等,文中对这诸多的物理要素作了系统的定位,以及它们在系统中的作用进行了分... 地球电磁场是一个大系统,其构成物理要素有:引力常数减小条件下核素放射性衰变所产生的地电荷、地球的旋转运动、地磁场、太阳黑子活动、磁暴、大气电场和雷电等,文中对这诸多的物理要素作了系统的定位,以及它们在系统中的作用进行了分析,并阐述了地球电磁场系统构成和运行的多样性、关联性、层次性、互补性和统一性的特点,由此而建立起了一个新地球电磁场系统运行机制. 展开更多
关键词 地球电磁场系统 地球的旋转 地电荷 磁暴 运行机制
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Occurrence conditions of positive cloud-to-ground flashes in severe thunderstorms 被引量:5
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作者 GUO Feng Xia LU Gan Yi +4 位作者 WU Xin WANG Hao Liang LIU Zu Pei BAO Min LI Ya Wen 《Science China Earth Sciences》 SCIE EI CAS CSCD 2016年第7期1401-1413,共13页
The purpose of this study was to understand the reasons why frequent positive cloud-to-ground(+CG) flashes occur in severe thunderstorms. A three-dimensional dynamics-electrification coupled model was used to simulate... The purpose of this study was to understand the reasons why frequent positive cloud-to-ground(+CG) flashes occur in severe thunderstorms. A three-dimensional dynamics-electrification coupled model was used to simulate a severe thunderstorm to permit analysis of the conditions that might easily cause +CG flashes. The results showed that strong updrafts play an important role in the occurrence of intracloud flashes. However, frequent +CG flashes require not only strong updrafts but also strong downdrafts in the lower cloud region, conditions that correspond to the later phase of the mature stage and the period of the heaviest solid precipitation of a thunderstorm. During this stage, strong updrafts elevated each charge area in the updraft region to a higher level, which resulted in an inverted tripole charge structure. A wide mid-level region of strong positive charge caused largely by positively charged graupel, presented in the middle of the updraft region because of a non-inductive ice-ice collisional charging mechanism. The charge structure in the downdraft region was consistently more complex and revealed several vertically stacked charge regions, alternating in polarity. Much of the graupel/hail outside the updrafts was lowered to cloud-base by strong downdrafts. In this area, the graupel/hail was charged negatively because of the transportation of negatively charged graupel/hail from higher regions of negative charge in the updrafts, and via the inductive charging mechanism of collisions between graupel/hail and cloud droplets at the bottom of the cloud. Consequently, a large region of negative charge formed near the ground. This meant that +CG flashes were initiated more easily in the lower inverted dipole, i.e., the middle region of positive charge and lower region of negative charge. Frequent +CG flashes began almost synchronously with dramatic increases in the storm updrafts, hail volume, and total flash rate. Therefore, the occurrence of +CG flashes appears a good indicator of storm intensification and it could have some use as a predictor of severe weather in the form of hail. 展开更多
关键词 Severe thunderstorm +CG flash Updraft Downdraft Graupel Hail Charge structure
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