含金黄铁矿的拉曼光谱特征及其找矿意义初探

黄铁矿的拉曼光谱特征长期被人们所忽视，经研究发现含金性不同的黄铁矿，其拉曼光谱特征存在诸多显著差异，其中尤以拉曼散射强度和相干度反应最敏感，反之，利用这些差异就可以对金矿床的含金性作出评价，此外，还对含金黄铁矿拉曼光谱产生的差异进行了理论剖析。     

CalculationoflongperiodresponsespectratoearthquakegroundmotionfromseismogramsofType513seismographs

ＣａｌｃｕｌａｔｉｏｎｏｆｌｏｎｇｐｅｒｉｏｄｒｅｓｐｏｎｓｅｓｐｅｃｔｒａｔｏｅａｒｔｈｑｕａｋｅｇｒｏｕｎｄｍｏｔｉｏｎｆｒｏｍｓｅｉｓｍｏｇｒａｍｓｏｆＴｙｐｅ５１３ｓｅｉｓｍｏｇｒａｐｈｓＹＡＮＸＩＡＮＧＹＵ（俞言祥）ＳＵＹＵＮＷＡＮ...     

中国铂族元素矿床类型和地质特征

根据成矿地质环境、容矿岩石类型、元素共生组合、矿床地质特征和成矿作用性质，将我国的铂族元素矿床划分为岩浆型、热液弄才外生型三大类型和九个亚类，而赋存于基性超基性岩体中的铜镍型铂族元素矿床是我国最重要的铂族元素矿床。     

周期—频度谱方法在大庆台网数字化地震记录分析中的应用

论述了周期－频率谱方法在分析数字化地震记录中的应用。结果表明该方法对识别各类振动的性质较为有效，所形成的一整套分析流程适用于各种地震数字记录分析。     

逆延华南气温序列方法的探讨

本文用香港１８８４－１９８３年逐年１月平均气温代表冬温，把它的年际变化时间序列作为原样本进行了谱分析，从中提取有代表性的周期波，用谱波分析和方差分析法，对选出来的周期波延，迭加，拟合成新的冬温时间序列。用地方志的冻灾史料进行了检验，结果９５％以上的冻灾年与新序列的冷冬年对应；冬季应温多出现连续性冷冬年，史料和新序列也有很好的一致性。     

全热解石墨管石墨炉原子吸收法测定痕量锶

研究了热解涂层和全热解石墨管中Sr的原子吸收信号形状和原子化行为,讨论了CaCl_2、FeCl_3和HClO_4,抑制Sr吸收信号的原因。采用EDTA铵盐作基体改进剂,全热解石墨管石墨炉原子吸收法直接测定河泥中痕量Sr,方法的特征量为6.9pg/0.0044A。     

冠层内动量和物质吸收特征的数值研究

本文设计了一冠层(CL)和大气边界层(ABL)之间物质和动量交换的耦合模式,并对CL内风速、物质随高度分布和日变化作了数值模拟.结果表明,由大尺度扩散引起冠层低层的第二个风速极大和多极值的浓度分布,CL内湍流通量和物质浓度随高度减小而迅速降低,以及CL动量减小对浓度分布的重要影响,模式都能很好地描述,模拟结果与观测事实有好的一致性.利用浓度和温度廓线相似假设,导出了质量汇的经验关系.     

Temperature-dependence of ultraviolet absorption cross-sections of alternative chlorofluoroethanes: 2. The 2-chloro-1,1,1,2-tetrafluoro ethane -HCFC-124

The temperature-dependent ultraviolet absorption cross-sections of CF₃-CHFCI (HCFC-124) have been measured between 170 and 230 nm for temperatures ranging from 295 to 210 K, with uncertainties between 2 and 4%. These results are compared with other available sets of determinations. Temperature effects are discussed and the photodissociation coefficients, presented with their temperature dependence, are calculated. Implication of the temperature dependences on the stratospheric chemistry is also discussed. Parametrical formulae are proposed to compute absorption crosssection values for wavelengths and temperatures useful in modelling calculations.     

Deterministic signals in precipitation in Arkansas,Louisiana, and Mississippi

Evidence for a signal near 19 years is found in 51 out of 65 rain gauge records in the tri-state region of Arkansas, Louisiana, and Mississippi, While another term with period 10 to 11 years is found in 39 instances. These are identified as the 18.6-year luni-solarM _n and solar cycleS _c signals in climate variability. In terms of both amplitude and phase the luni-solar wave trains are highly nonstationary; in particular, the waves commonly change phase by 180°. Examples of theM _n andS _c terms in corn yield for Arkansas and Missouri are presented, and the implications for economic science briefly discussed.