菏泽5.9级地震前后沂水泉氡区间概率的变化

影响沂水泉氡值变化最大的干扰是降雨。因为这种干扰存在着“记忆”滞后影响 ,所以用一般的相关分析难以将这种影响排除干净。研究表明采用褶积积分方法可较好地排除这种影响 ,同时分析了菏泽 5 .9级地震前后沂水泉氡区间概率的变化特点 ,讨论了区间概率的变化与区域应力场的调整变化的关系     

Chlorinated hydrocarbons in fish-eating birds from the Gdańsk Bay,Baltic sea

Chlorinated hydrocarbons in industrial and agricultural use are found at significant concentrations in coastal regions. This paper reveals concentrations of HCB, DDT and PCB in tissues of the fish-eating birds staying at their winter quarters in the South Baltic.     

溧阳地震台gPhone连续重力仪观测数据处理与分析

选取溧阳重力连续观测台站gPhone连续重力仪2011年1月1日至2018年7月31日整点值观测数据进行预处理,对于连续性较好的2017年重力观测数据,分析其固体潮汐变化M_2波潮汐因子及非潮汐变化的残差曲线特征,并以Δ3 500 km、M_S 5.0地震事件为例,检验gPhone重力仪的地震记录能力。分析认为,溧阳台gPhone重力仪观测数据日趋稳定,潮汐信号可靠,非潮汐变化的残差曲线对地震有一定程度的反应,可记录到一定范围内MS≥5.0地震的同震信号,信号记录特征与震中距及震级相关。     

2001年2月23日四川省雅江-康定6.0级地震宏观烈度考察及发震构造背景刍议

2001年2月23日在四川省境内发生了6.0级地震,其宏观震中位于雅江县与康定县之间的高山峡谷地带.极震区烈度达Ⅷ度,Ⅷ度区、Ⅶ度区和Ⅵ度区面积分别为180、1472和3998km2,等震线分布总体形态呈椭圆形,长轴近南北向.震区建筑物普遍受损,山地灾害较为严重.据初步分析认为,此次地震的发生与理塘断裂和玉龙西断裂的长期活动有关,主干断裂活动造成地壳应力调整和集中,最终在块体内部的次级断裂上释放而发生地震.     

基于小波理论的IKONOS卫星全色影像和多光谱影像的融合

1999年9月24日发射成功的世界上第一颗商用1m分辨率的卫星IKONOS，具有1m分辨率的全色影像和4m分辨率的多光谱影像，通过对IKONOS1m分辨率的全色影像和4m分辨率的多光谱影像的融合可以获得1m分辨率的多光谱影像，为应用提供理高质量的数据源，基于小波多分辨率分析的MRAGM方法，它适合处理任意整数分辨率之比的融合情况，具有在提高影像空间分辨率的同时又保持色调和饱和度不变的优越性，而实现它的关键是构建具有紧支撑特性的M进制低通尺度函滤波器，本文利用基于四进制小波滤波器的MRAGM算法，成功地把全色影像和多光谱影像进行了融合，结果显示该方法的效果令人满意。     

浅析AATM/PAT-B在生产中的应用

文章主要从实际应用的角度出发 ,介绍了自动空中三角测量AATM /PAT -B系统的作业流程以及实际作业当中应特别注意的一些问题 ;总结了AATM/PAT -B系统在实际应用中的主要优点     

2000年6月6日景泰5.9级地震的两次破裂研究

利用甘肃数字台网的波形资料，应用主事件分析方法研究了2000年6月6日景泰5．9级地震的破裂过程，结果一，这次地震由两次破裂构成，在空间上东西相距21km，时间相隔3．9s，这一结果能很好的解释本次地震的宏观破坏现象，对进一步第原及海原西断裂的现今活动性有一定的意义。     

The dry oxidation of tetragonal FeS1- x mackinawite

The gradual oxidation of dry mackinawite (tetragonal FeS_{1? x} ) has been studied using X-ray diffraction (XRD), transmission electron microscopy (TEM), transmission Mössbauer spectroscopy (TMS) and X-ray photoelectron spectroscopy (XPS). The initial material and samples exposed to the air (5?min to 6?months) have been analysed. Diffraction patterns showed the slow disappearance of mackinawite with time with concomitant appearance of greigite (Fe₃S₄) and elemental sulphur (S(0)) as well as iron (oxyhydr)oxides, i.e. magnetite (Fe₃O₄) and probably goethite (α-FeOOH). After 6 months' air exposure, mackinawite and also greigite were entirely converted into elemental sulphur and iron (oxyhydr)oxide(s), indicating that greigite was an intermediate reaction product. Mössbauer spectra of samples oxidized in air appeared rather complex for interpreting what was easily conceivable in view of the association of several phases, as revealed by the diffraction patterns. The low-temperature Mössbauer spectrum obtained after 6?months air exposure was attributed to magnetite, although a mixture of magnetite and goethite was not completely excluded. XPS iron and oxygen data confirmed the formation of Fe(III) (oxyhydr)oxides at the surface after an induction period. Sulphur spectra demonstrated various oxidation states from S(-II) (monosulphide) to S(VI) (sulphate) for the longest experiments. Mackinawite in these experiments reacted mainly with adsorbed O₂ to form elemental sulphur and magnetite. Additionally, sufficient sulphur was generated to react stoichiometrically with mackinawite to produce greigite. Finally, greigite, in the longest experiments, was transformed into elemental sulphur and magnetite.     

Study of Al-substituted hematites, prepared from thermal treatment of lepidocrocite

A study of the characteristics of the Morin transition in aluminous hematites, α-(Fe_1?xAl_x)₂O₃, produced from thermally transformed lepidocrocites, is reported. Six compositions with Al contents between 0.2 and 10 at% have been considered. It is argued that these samples present the advantage that they contain smaller amounts of hydroxyl and water as compared to hematites obtained by other preparation methods. The samples were characterised by a variety of conventional techniques, including thermal analyses, X-ray diffraction, FTIR, TEM/EDX, BET surface-area measurements and diffuse reflectance spectroscopy. All results indicate that the Al is structurally incorporated in the hematite lattices. Transmission Mössbauer spectra were recorded at various temperatures between 80?K and room temperature in order to precisely determine the Morin-transition region and the spin structure in both the low-temperature antiferromagnetic and weakly ferromagnetic states. It was found that the Morin-transition temperatures are markedly higher as compared to similar hematites made from aluminous goethites and that a transition phenomenon persists to an Al substitution of up to at least 10 at%. This different behaviour is ascribed to lower concentrations of structural hydroxyl groups in these lepidocrocite-based hematites.     

大同—阳高震群多波分析及震群特征：—CDSN应用系列论文五

本文应用多波震相分析法,对1989年10月18日大同震群进行研究。使用模拟和数字台网资料,对主、余震群进行了多波分析处理。初步探讨了主震群的震源机制解及其与地质构造的关系;用sPn、P_M、S_M 等震相较准确的测定了震源深度及震群深度变化范围;通过震相、波形和振幅比的综合分析,清晰的显示大同-阳高震群具有两种震源类型特征,其中用(M)界面反射波 P_M、S_M 的振幅比,做出的大同-阳高地震序列时空域图象更为明显。本文初步研究表明,多波震相分析法,对较准确的测定主余震群的震源深度,推测震源延伸的走向,初步判断震源机制的变化及有可能为单台开展监测预报探索到一种新的途径。