电磁波井间CT成象技术及其在岩土工程中的应用

简要叙述了电磁波ＣＴ成象技术的基本原理、工作方法及其在岩土工程中诸如机场跑道、隧道工程和高层建筑地基评价中的应用。通过井下激发和观测电磁波能量的衰减，利用ＣＴ技术重建了地下介质在观测平面内相对吸收系数的二维分布图象，这些图象直观准确地反映出地下介质的构造形态、地层界面、风化壳以及破碎带的分布特征，在岩土工程探测中发挥了重要作用。     

运用人工神经网络作汛期降水预报

本文提出汛期降水预报的人工神经网络方法，并选择一组标样进行了具体分析，预报成功率达100％，结果表明，该方法性能良好，可望成为汛期降水预报的有效手段。     

高温热水孔逸出气氡观测实验研究

本文通过在漳州龙师１＃井开展的逸出气氡观测实验研究，认为逸出气氡作为新的地震前兆观测项目是可行的，可以进行平行样观测，同时可得到Ｒｎ气／Ｒｎ水比值，作为研究地下流体前兆的一个新的参数。并对应用电离法测量逸出气氡的连续自记观测技术进行了预研究试验。     

南方冬小麦三叶——抽穗期干物重与叶面积动态耦合计算探讨

根据实测资料,尝试性地提出了一种南方麦区冬小麦三叶到抽穗期的干物重与叶面积动态的耦合计算方法,经检验效果尚好。另外,初值灵敏度试验表明苗期生长状况的优劣对于其后生育阶段的干物重与叶面积动态影响似乎不大。     

DYNAMIC INFLUENCE OF QINGHAI-XIZANG PLATEAU AND ROCKY MOUNTAINS ON THE LEE CYCLONES

Using the operational model(B model)of Beijing Meteorological Center,we do some of numerical experi-ments of crossing and rounding mountains in all velocity adjustment scheme,and study dynamic effect ofQinghai-Xizang Plateau and Rocky Mountains on lee cyclones.The results show that due to air flow roundthe Qinghai-Xizang Plateau,divergence is distributed in the shape of confluence which matches cyclogenesisarea and cyclonic track in East Asia.In the downstream of the Qinghai-Xizang Plateau,convergence inthe upper troposphere restrains cyclone development in the east of China mainland.In North America,air flow primarily crosses over Rocky Mountains.Air is adiabatically cooled when it flows upward in thewest flank of Rocky Mountains,while air is warmed when it flows downward in the lee side.The fact isimportant for the lee cyclogenesis and the lee frontogenesis of Rocky Mountains.Air flow crossing over RockyMountains is also the main cause for forming dryline in the mid-west of United States.     

某钼-铀矿床矿化特征及成因类型探讨

矿床产于中元古代地层中。矿区内酸性脉岩发育,常密集成带,矿床受穿过脉岩带的构造破碎带控制。矿化岩石主要为构造碎裂岩和角砾岩,其原岩为长英质脉岩、变石英砂岩、变安山岩、板岩及粉砂岩等。矿化以裂隙充填为主,对围岩化学成分的选择性不大。围岩蚀变有:绢云母化、硅化、钾长石化、黑云母化、黄铁矿化、赤铁矿化及水合多水高岭石化等。铀矿物主要为沥青铀矿、铀黑、铀石,其次有钛铀矿、水铀矾,含铀矿物有锐钛矿、金红石、赤铁矿、水合多水高岭石和褐铁矿等;其它金属矿物主要有辉钼矿、黄铁矿、方铅矿和黄铜矿。矿石具脉状、角砾状、块状和浸染状构造,沥青铀矿具胶状结构。矿床中钼的储量远大于铀,铀矿体产于钼矿体之中或其边部。通过室内、外研究,可以认为本矿床为与中酸性小侵入体有关的中-低温热液成因的钼-铀型复合矿床。     

多钙钾石膏的矿物学研究

多钙钾石膏产于四川省渠县农乐地区中-下三叠统的杂卤石矿层里,与硬石膏一起交。代杂卤石。矿物呈板状,{110}解理中等。比重2.91。折光率:Ng=1.585,Nm=1.5θ8,NP=1.560。二轴晶正,2V=79°。该矿物属单斜晶系。空间群C2/c。晶胞参数:a_0=17.479A,b_0=6.821A,C_0=18.218A,β=113.39°。粉末图的五条强衍射线为:3.01(10)、3.16(8)、3.38(6)、2.83(4)、2.74(3)。根据化学分析计算,其化学式为:K_2SO_4·5CaSO_4·H_2O。结晶水含量2.O4%。文内列出了该矿物的差热(DTA)和热失重(TGA)、红外吸收光谱等新资料。     

我国强对流发生前的能量贮存机制

本文通过对1969—1979年我国27次大范围强对流天气的分析,发现其中只有不到30％的个例在强对流天气发生前存在低空逆温层.而从垂直运动计算和层结特征分析看,无论有或无逆温层,强对流出现前都有大范围系统性的下沉运动.由此可以认为大范围系统性的下沉运动是使强对流发生前位势不稳定能量贮存和积累的主要机制.而低空逆温层只是特定的下沉运动的产物,并依靠下沉运动而维持.同时指出这种下沉运动造成深厚的暖干气层,是发生龙卷、强雷暴大风等干性强对流天气所必须. 另外,对有低空逆温层的个例统计了各种特征量,并与美国的情况     

湖南强风暴暖盖环境场研究

本文通过对湘中、湘北地区42次强风暴资料的分析,建立了一个强风暴环境场的天气学模式,着重讨论了暖盖(即对流层中下层的逆温层)的形成和维持机理. 暖盖是由于绕过青藏高原两侧的两支西风波动相互作用而产生的.它的存在有利于低空急流在其东部边缘的低空加强,而低空急流引起的垂直环流反过来又有利于暖盖的维持,当暖盖下降到低空急流轴附近时因受扰动而破坏,引起强风暴的发生.     

A catastrophe mathematical model for uranium mineralization of hot-water origin

Presented in this paper are some primary data on the temperature, stratigraphical altitude and thickness of a certain uranium ore deposit. Taking these data as the parameters for the temperature, pressure and geochemical conditions of uranium mineralization under ideal geological conditions which constitute a finite variable series, in conjunction with the catastrophe theory developed by Rene Thom (1968), we have proposed a swallow-tail model fit to uranium mineralization. This model provides insight into the mechanism of uranium mineralization. Our study shows that the process of uranium mineralization is a discontinuous or catastrophic event. Temperature and pressure are considered important thermodynamic conditions which control the distribution pattern of uranium mineralization, and the principle of temperature-pressure correspondence for uranium mineralization has been also derived. Geological bodies of minerogenetic importance serve as favourable geochemical media for capturing ore-forming materials. Uranium mineralization of commercial importance depends on a delicate coupling between temperature,pressure, and geochemical condition. The loci of uranium mineralization in the model constitute the surfaceK, referred to as the surface of enrichment-mineralization, on which minerogenetic domain is expected. The model provides quantitatively clues to the process of uranium mineralization, i.e., a process from quantitative to qualitative changes.