用图像处理技术研究油气田的航磁航放异常

用图像处理技术对下述与油气田异常有关的问题进行了研究：快速提取高频弱磁异常,估算高频磁异常源的埋深,放射性异常性质的归一化处理,典型异常剖面的分析,以及油气远景评价,提出了４个有希望含油气的异常．经验证,这４个异常中有３个见到油气显示,其中１个为工业气流．     

Ecological Worldview as the Central Component of Environmental Concern: Clarifying the Role of the NEP

This study examines whether an ecological worldview—operationalized by the New Ecological Paradigm (NEP) Scale--serves as the source of coherence of Environmental Concern (EC). Using data on four samples from the 1992 Gallup “Health of the Planet” Survey and the 2003 and 2010 Chinese General Social Surveys, we found that in all samples not only is the NEP the most powerful predictor of EC, but it also mediates the effects of socio-demographic variables on EC as hypothesized. The results confirm that the NEP is the source of coherence of EC, making it a meaningful construct.     

珠江口两岸耕地景观破碎化定量分析

在GIS技术的支持下,利用景观格局分析软件FRAGSTATS3．0对珠江口两岸耕地资源进行景观破碎化定量分析。研究结果表明,两岸耕地资源碎化程度存在明显的区域差异,珠江口东岸高于西岸,深圳最高,番禺耕地地块数量破碎化与珠海耕地地块形状破碎化程度最低;地貌结构是两岸耕地资源破碎化差异的主要内在因素;快速城市化与工业化占用大量耕地资源同时．在一定程度上影响到两岸耕地资源空间分布特征与耕地资源的完整性。     

黄河三角洲农牧业生产潜力

本文从对黄河三角洲的宜农地和宜牧地的分析入手,对该区农作物生产潜力、牧草及载畜量潜力进行了探讨。并针对目前农牧业生产水平和存在的问题,提出了相应的对策。     

Science, Technology and Detectors for Extremely Large Telescopes

The second decade of the third millennium will hopefully see a new generation of extremely large telescopes. These will have diameters from 30 to 100 meters and use advanced adaptive optics to operate at the diffraction limit in order to detect astronomical objects that are impossible to observe today, such as earth-like planets around nearby stars and the earliest objects in the Universe. Even for small fields of view, the requirements for detectors are daunting, with sizes of several gigapixels, very fast readout times and extremely low readout noise. In this paper I briefly review the science case for ELTs and the requirements they set on telescopes and instruments, and report on the status of the OWL 100 m telescope project and the challenges it poses.     

On the energy density of the cosmic microwave background

Starting from the assumption that the radiation source at the origin of the cosmic microwave background (CMB) could not have a luminosity larger than the maximum energy in ordinary matter divided by the minimum time allowed by causality, one arrives at an expression that gives the energy density of CMB as a function of the main cosmological parameters. Also, by defining a radiation charge as the hypothetical charge that opposes the congregation of a cloud of particles around a source of electromagnetic radiation, on arrives at another expression for the energy density of CMB that agrees exactly with the measured value for a value of the Hubble constant equal to 72.09 km s⁻¹ Mpc⁻¹. Both expressions are independent of the redshift.     

一类ENSO事件与四川地区粮食产量的相关分析

本文对1949年以来出现的10次ENSO事件进行了分析,得出如下结果:开始於东太平洋增暖和中大平洋增暖的两类ENSO现象分别对应四川地区粮食产量的减产和增产。此结果对四川地区粮食生产政策的制定及产量的预测研究均有较重要的参考价值。     

Prognosis of TiO2 abundance in lunar soil using a non-linear analysis of Clementine and LSCC data

We suggest a technique to determine the chemical and mineral composition of the lunar surface using artificial neural networks (ANNs). We demonstrate this powerful non-linear approach for prognosis of TiO₂ abundance using Clementine UV-VIS mosaics and Lunar Soil Characterization Consortium data. The ANN technique allows one to study correlations between spectral characteristics of lunar soils and composition parameters without any restrictions on the character of these correlations. The advantage of this method in comparison with the traditional linear regression method and the Lucey et al. approaches is shown. The results obtained could be useful for the strategy of analyzing lunar data that will be acquired in incoming lunar missions especially in case of the Chandrayaan-1 and Lunar Reconnaissance Orbiter missions.     

30多年来呼伦贝尔草原沙漠化的演变特点及防治对策研究

采用遥感技术与野外调查相结合的方法,通过3个典型小区对呼伦贝尔草原30多年来的沙漠化演变特点进行了系统研究。结果表明:该区的樟子松林区发生着强烈的沙漠化逆转,许多地段已转变为非沙漠化土地;其它地区除部分地段由于人类的积极治理而发生沙漠化逆转外,仍处于不断发展的过程中。因此,对于樟子松天然分布区,可充分利用樟子松的优良防风固沙特性和较强的扩展能力来防治沙漠化,而对其它地区则应以封育为主,加强人工抚育和草原建设。     

毛乌素沙地固沙造林针叶树种选择的研究

选择樟子松、油松等五种针叶树种在毛乌素沙地进行栽植试验,通过对成活率与保存率、生长量、蓄积量、抗逆性等14年的观测,从单项及多指标综合选优及排序,确立樟子松为毛乌素沙地针叶树造林的优选树种。