地震映像和瞬变电磁法在采区空洞勘查中的综合应用

文章介绍了地震映像法和瞬变电磁法（TEM）工作原理及特点，并以某采区空洞勘查为例介绍了地震映像法和瞬变电磁法综合应用查我场地内空洞、土洞的形态、规模及空间分布情况，圈定裂隙发育带的应用及效果。     

Environmental toxicology and exposure to natural dust： The role of trace elements

This discussion reviews environmental toxicology and health effects of trace elements and compounds carried in natural dusts of geologic or geochemical origin. The sources of these dusts are diverse, including volcanoes, dust storms, long-range transport of desert dust, and displacement through natural processes such as landslides and earthquakes. Estimates diverge greatly in terms of the total quantities of dust transported, although recent papers place annual volumes at over 1 billion tons from the main African deserts alone. Anthropogenic influences （such as from farming and irrigation） have contributed to dust formation by enhancing the process of desertification, with losses of over 10 million hectares （~29 million acres） of farmland per year. The principal elements and compounds which are examined in this presentation are trace metals and metalloids, radioactive elements, fluoride, silicates, natural asbestiform compounds, and alkali salts. The pathways by which such agents affect human populations are examined, including carriage through water, air, soil and the foodchain. The mechanisms of biotoxicity, and the acute and chronic consequences on health, associated with toxic trace metals are described.     

高光谱遥感影像矿物自动识别与应用

在对矿物光谱特征理解与归纳的基础之上，对矿物光谱特征进行知识化表达，利用数理逻辑和一定的判别规则实现对高光谱遥感影像矿物的自动识别与批量化信息提取。在ENVI平台上，利用IDL语言开发了高光谱遥感影像矿物分层自动识别模（Mineral Auto-identification Module Basedon Spectral Identification Tree：MAIM-SIT）。该模块已经在新疆东天山哈密地区利用HyMap数据、西藏驱龙地区利用Hyperion数据以及美国Cuprite地区利用AVIRIS数据成功地进行了矿物识别，可识别的矿物或矿物组合可达10种以上，基本实现了高光谱矿物信息提取的智能化与批处理能力。     

2003年10月底太阳风暴期间中山站电离层吸收效应的观测与分析

本文介绍了成像式宇宙噪声接收机技术和数据分析方法,通过对南极中山站成像式宇宙噪声接收机在2003年10月底太阳风暴期间的观测数据进行分析,得到了相应的极区电离层的吸收效应,它们主要是强度为2. 7dB的宇宙噪声突然吸收和强度高达31dB持续4d的极盖吸收。     

虚拟仪器技术及其在电磁成像仪研发中的应用

本文介绍了虚拟仪器的基本概念、基本结构和特点,详细阐述了根据虚拟仪器技术开发的电磁成像仪的硬件结构、采集软件的功能和系统的总体特点.     

Imaging and power generation strategies for chandrayaan-1

The Chandrayaan-1 mission proposes to put a 550 kg lunarcraft into Geostationary Transfer Orbit (GTO) using the Polar Satellite Launch Vehicle (PSLV) which will subsequently be transferred into a 100 km circular lunar polar orbit for imaging purposes. In this paper, we describe certain aspects of mission strategies which will allow optimum power generation and imaging of the lunar surface. The lunar orbit considered is circular and polar and therefore nearly perpendicular to the ecliptic plane. Unlike an Earth orbiting remote sensing satellite, the orbit plane of lunar orbiter is inertially fixed as a consequence of the very small oblateness of the Moon. The Earth rotates around the Sun once a year, resulting in an apparent motion of Sun around this orbit in a year. Two extreme situations can be identified concerning the solar illumination of the lunar orbit, noon/midnight orbit, where the Sun vector is parallel to the spacecraft orbit plane and dawn/dusk orbit, where the Sun vector is perpendicular to the spacecraft orbit plane. This scenario directly affects the solar panel configuration. In case the solar panels are not canted, during the noon/midnight orbit, 100% power is generated, whereas during the dawn/dusk orbit, zero power is generated. Hence for optimum power generation, canting of the panels is essential. Detailed analysis was carried out to fix optimum canting and also determine a strategy to maintain optimum power generation throughout the year. The analysis led to the strategy of 180‡ yaw rotation at noon/midnight orbits and flipping the solar panel by 180‡ at dawn/dusk orbits. This also resulted in the negative pitch face of the lunarcraft to be an anti-sun panel, which is very useful for thermal design, and further to meet cooling requirements of the spectrometers. In principle the Moon’s surface can be imaged in 28 days, because the orbit chosen and the payload swath provide adequate overlap. However, in reality it is not possible to complete the imaging in 28 days due to various mission constraints like maximum duration of imaging allowed keeping in view the SSR sizing and payloads data input rate, time required for downlinking the payload data, data compression requirements and visibility of the lunarcraft for the Bangalore DSN. In each cycle, all the latitudes are swept. Due to the constraints mentioned, only 60‡ latitude arc coverage is possible in each orbit. As Bangalore DSN is the only station, half of the orbits in a day are not available. The longitudinal gaps because of non-visibility are covered in the next cycle by Bangalore DSN. Hence, in the firstprime imaging season, only 25% of the prime imaging zones are covered, and an additional threeprime imaging seasons are required for a full coverage of the Moon in two years. Strategy is also planned to cover X-ray payload coverage considering swath and orbit shift.     

基于VSP的透射PS波成像

利用弹性波动方程进行了非零偏移距VSP波场的数值模拟,通过偏振投影和中值滤波技术相结合进行波场分离,对分离后的反射P波和透射PS波利用动校正(NMO)和VSPCDP叠加技术进行成像。成像结果表明:透射PS波成像与反射P波成像具有同样良好的效果,而且透射PS波成像是反射波成像很好的补充。利用透射PS波成像不需要增加数据采集的成本,所以透射波成像技术将会在石油工业中被广泛采用。