An Improved Splitting Method

In this paper, an improved splitting method, based on the completely square-conservative explicit difference schemes, is established. Not only can the time-direction precision of this method be higher than that of the traditional splitting methods but also can the physical feature of mutual dependence of the fast and the slow stages that are calculated separately and splittingly be kept as well. Moreover, the method owns an universality, it can be generalized to other square-conservative difference schemes, such as the implicit and complete ones and the explicit and instantaneous ones. Good time benefits can be acquired when it is applied in the numerical simulations of the monthly mean currents of the South China Sea.     

坝体弹模及坝基变模反演分析的研究

本文在理论分析的基础上,应用变形观测资料,系统讨论了反演混凝土坝坝体和坝基的物理力学参数(弹性模量)的原理和方法,并给出了详细的算例。     

THEORETICAL CALCULATION MODEL OF SHORTWAVE RADIATION FOR THE EARTH-ATMOSPHERE SYSTEM AND ITS TESTING RESULTS

On the basis of radiation transfer theory,adopting improved two-stream algorithm incorporated with addingalgorithm,we build up a theoretical calculation model of shortwave radiation for the earth-atmosphere system whichcan be applied with satellite data.The model can calculate direct solar radiation,scattering solar radiation,heating rateand other physical quantities of radiation field at every layer of the atmosphere and on the earth's surface,if the under-ground reflectance or the planetary albedo obtained from satellite can be known.The model can be used in clear orcloudy atmosphere,and its calculating speed is fairly fast.We think that the model can be incorporated into large-scaleand mesoscale climatic models for the consideration of radiation calculation,and also it is useful for the utilization of so-lar energy.     

凤凰─茶陵地学断面重力异常机制分析

对凤凰─茶陵地学断面重力异常,根据爆炸地震测深资料,确定密度分层,用变密度水平梯形体构制剖面密度模型,计算理论重力异常和实测布格重力异常吻合较好。根据剖面密度模型,可以合理地解释布格重力异常。并将地壳划分为沉积盖层、变质岩层、麻粒岩层三层结构,分别计算三层的重力效应曲线及上地幔低密度体重力效应曲线。还计算了莫霍面起伏引起的重力异常曲线,分析了引起地壳重力异常的各种因素及特点。     

异性石中平面四配位Fe^2＋的穆斯堡尔谱研究

除硅铁钡矿之处，性石是迄今仅知的另一种含有平面四配位Ｆｅ＾２＋的矿物，异性石晶体样品为玫瑰色，透明，有油脂光泽，取自一花岗岩标本，异性石中平面四配位Ｆｅ＾２＋的穆斯堡尔参数：化学位移＝０．７８５（ｍｍ／ｓ）（相对天然铁），四极矩分裂＝０．４１９（ｍｍ／ｓ），明显地低于大多数硅酸矿物中的Ｆｅ＾２＋，但和硅铁钡矿的Ｆｅ＾２＋十分相近，本文对硅酸盐矿物Ｆｅ＾２＋的穆斯堡尔参数与配位数之间的关系做了讨论。     

开鲁盆地陆家堡西部凹陷上侏罗统沉积体系研究

本文运用地质、地震和测井等资料对陆西凹陷上侏罗统沉积体系特征进行了综合研究。该区上侏罗统发育了近岸水下扇、三角洲和以凹陷中古隆起为沉积背景的高垒斜坡扇等3种沉积体系，其中近岸水下扇为上侏罗统分布最普遍的沉积类型，构成本区主要储层，高垒斜坡扇是与水下古隆起有关的由滑塌作用形成的重力流沉积体，构成本区极富特色的沉积体系。     

预制桩静压施工技术在软土地基中的应用

软土地基中应用预制桩静压施工法，效果显著，自制的静力压桩机满足了施工工艺要求。从实际施工中总结出了钢筋混凝土方桩的制作工艺和预制桩静压法施工要点及质量保证措施。     

Sequence Stratigraphic Features of Mesozoic－Cenozoic Nonmarine Sediments in Eastern China

ＳｅｑｕｅｎｃｅＳｔｒａｔｉｇｒａｐｈｉｃＦｅａｔｕｒｅｓｏｆＭｅｓｏｚｏｉｃ－ＣｅｎｏｚｏｉｃＮｏｎｍａｒｉｎｅＳｅｄｉｍｅｎｔｓｉｎＥａｓｔｅｒｎＣｈｉｎａ￥ＸｕＨｕａｉｄａ；ＷｅｉＫｕｉｓｈｅｎｇ（ＤｅｐａｒｔｒｍｅｎｔｏｆＥｎｅｒｇｙＲｅｓｏ...     

河南登封-鲁山地区地壳出露剖面岩石高压条件下地震波速特征的实验研究

首次给出了河南登封—鲁山一带地壳出露剖面岩石高压条件下纵波速度V_p值的实验测定结果。样品分别采自古元古代的安沟群及新太古代的登封群和太华群。静态压力自常压至3000MPa变化。结果表明,岩石的纵波速与岩性关系密切。上、中地壳岩石的V_p 随压力的增加变化范围明显大于下地壳岩石,变质等级的增加伴随着V_p的明显增大,经温度影响校正后的V_p值与位于邻近地区的QB-1地震测深剖面的解释结果吻合很好。     

震旦系陡山沱组的底与待建的末前寒武系的下界

自1988年末前寒武系工作组成立以来,末前寒武系的建系工作正式开展起来。鉴于寒武纪/前寒斌纪的界线层型已经确定,现在的一个中心议题,是要确定末前寒武系的下界及其层型。