地貌成因中力的耦合律

本文提出了“地貌形成中力的耦合律”,认为地貌是在动力和反动力作用下形成、发展和演化。演化过程中,动力和反动力在偶合点处互相激活产生了循环前进式的多层次的地貌演化模式。     

我国两种蒸发观测资料的对比分析

通过１９８０年以后的Ｅ－６０１型蒸发资料与相同时期的２０ｃｍ小型蒸发资料的比较,分析了两种蒸发资料的特点,给出了两者的折算系数、相关系数、离差系数,建立了利用小型蒸发资料计算大型蒸发资料的订正公式     

热带太平洋SSWA特征及其在ENSO循环中的演变

应用1970年1月至1989年12月热带太平洋SSTA（海面温度距乎）和SSWA（海面风距平）资料,分析发现：热带太平洋SSWA的主要空间特征和海气耦合主要空间型均表现为ElNino（LaNina）盛期的SSWA分布。热带太平洋SS－WA的主要传播特征与ENSO循环过程中SSWA的演变是一致的,表现为赤道中东太平洋海面阻平东、西风的转换和赤道东太平洋SSWA辐散、辐合的转换。赤道中东太平洋距平东风（西风）向赤道距平西风（东风）的转换伴随着中西太平洋副热带SSWA偶极子气旋（反气旋）的生消,偶极子气旋（及气旋）表现为明显的北半球强于南半球。     

Estimation of dynamic ocean topography in the Gulf Stream area using the Hotine formula and altimetry data

Two modifications of the Hotine formula using the truncation theory and marine gravity disturbances with altimetry data are developed and used to compute a marine gravimetric geoid in the Gulf Stream area. The purpose of the geoid computation from marine gravity information is to derive the absolute dynamic ocean topography based on the best estimate of the mean surface height from recent altimetry missions such as Geosat, ERS-1, and Topex. This paper also tries to overcome difficulties of using Fast Fourier Transformation (FFT) techniques to the geoid computation when the Hotine kernel is modified according to the truncation theory. The derived absolute dynamic ocean topography is compared with that from global circulation models such as POCM4B and POP96. The RMS difference between altimetry-derived and global circulation model dynamic ocean topography is at the level of 25cm. The corresponding mean difference for POCM4B and POP96 is only a few centimeters. This study also shows that the POP96 model is in slightly better agreement with the results derived from the Hotine formula and altimetry data than POCM4B in the Gulf Stream area. In addition, Hotine formula with modification (II) gives the better agreement with the results from the two global circulation models than the other techniques discussed in this paper. Received: 10 October 1996 / Accepted: 16 January 1998     

A NUMERICAL STUDY ON THE INFLUENCE OF WIND FIELDS AT UPPER LEVELS IN THE MEIYU PERIOD ON THE DEVELOPMENT OF LOW LEVEL JET AND MESOSCALE SYSTEMS*

Using a mesoscale model,a numerical study on a heavy rainfall case occurring in the Changjiang-Huaihe River Basin is made in this paper.The influence of the intensity of northeasterly wind in front of the Qinghai-Xizang high at upper level on the low level wind field and development of mesoscale systems as well as heavy rainfall is investigated.The model well reproduced the heavy rainfall process and the weather systems associated.And it indicates that the strong northeasterly flow around the high at upper troposphere will bring about not only the strengthening of low level southeasterly wind,but also the appearance of shear-line and mesoscale vortex at low level.The coupling of northerly wind at upper level and southerly wind at lower level constructs a vertical indirect circulation which is most favourable for the development of convective motions.Its ascending branch in the shear-line area is very strong and shows a pronounced mesoscale characteristic.     

高强混凝土桩中坍落度的选取与应用

叙述了高强混凝土在桩基工程中的实际应用,提出了桩基混凝土试配当中与一般混凝土试配的不同之处及试配的方法与具体应用。     

A Note on Extension Variances in IR2

Matheron (1971) proposed an approximation of the extension variance in IR. We propose in this note an extension of this formula in IR ² , based on a MacLaurin formula. Its application is shown in an example, the estimation of the maximum depressional storage of a soil surface.     

热压薄壁金刚石钻头的设计制造与应用

对薄壁金刚石钻头的结构、钢体、加工工艺和规程进行了介绍与分析,并对薄壁金刚石钻头胎体作了不同配方的筛选,选出了ＧＷ１和ＧＷ２号配方,在室内和生产试验中取得了较好的效果。     

新矿物（1992.7—1992.12）

本文以表格形式列举了１９９２年７月至１９９２年１２月经《国际矿物学协会（ＩＩＭＡ）新矿物与矿物命名委员会（ＣＮＭＭＮ）》批准并在各国矿物学杂志上发表的５０个新矿物的中文英文名称、化学式及其他数据。数据依次为：矿物的晶系、空间群、晶胞参数、主要粉晶数据（Ｉ、ｈｋｌ）、物理性质（晶形、颜色、条痕、光泽、解理、发光、硬度、密度等）、光学性质（一、二轴晶、正、负光性,折光率,反射率,双反射,２Ｖ,色散,吸     

裂隙岩体渗流应力耦合研究综述

系统综述了裂隙岩体渗流应力耦合的研究情况。阐明了单裂隙面的各种经验公式、间接公式及其适用条件,分析了裂隙岩体渗流应力耦合模型优缺点及目前工程应用情况。