稀土在热压人造金刚石工具中的应用研究

稀土有其独特的物理化学性能 ,能有效地提高硬质合金的综合性能。将稀土在硬质合金中的应用成果借鉴到金刚石工具研制中 ,并对其关键的掺杂工艺进行改进 ,取得了成功。对于以 Fe代 Co和提高金刚石工具的性能起到了明显的作用。     

地球重力模型及中国大陆重力场的计算

融多颗卫星数据、地面重力值和其它资料一起的地球重力模型EGM 96 ,为研究中国大陆的重力场及相关问题提供了一个高精度 36 0阶的球谐系数。在分析EGM 96的基础上 ,计算并简单解释了中国大陆的自由空气异常和布格重力异常。计算所得重力场的精度和分辨率大大高于常用的1∶140 0 0 0 0 0自由空气异常图及布格重力图     

浅议地球系统的复杂性及非线性

结合复杂性科学的产生及发展历程，认为复杂性科学对研究地球系统复杂性及非线性具有重要的理论指导和方法论意义。同时，在论述地球系统基本属性的基础上总结了地球系统复杂性及非线性的具体表现，即地球系统的层次性，无特征尺度性，开放性，相干性，临界性，自组织性和其动力学行为的自相似性及分形性。认为地球系统是总体上远离平衡，时空延展的多层圈综合集成，连续开放的复杂耗散动力巨系统。随着复杂性科学和地球系统的复杂性及非线性研究的不断深入，在21世纪，地球科学研究将会取得理论上的重大突破和飞跃。     

四川牦牛坪稀土矿床矿物流体包裹体研究

对矿物流体包裹体进行分析的结果表明，牦牛坪稀土矿床的矿物中存在4种类型包裹体：（1）液-所耵；（2）液-气-固相；（3）纯气相；（4）固相，矿物包裹体显微测温结果显示牦牛坪矿床成矿温度从423℃至122℃；成矿流体的盐度ω（NaCl)为11.46%-14.36%质量分数，包裹体的成分分析结果显示流体中富含CO2和其他挥发性组分，并富含大量的不同成分的矿物雏晶，根据矿床地质特征和矿物包裹体的研究结果，作者认为本矿床的成矿作用是由碳酸岩岩浆气液流体的沸腾、充填和交代过程而实现的。     

Location and height of intertidal bars on macrotidal ridge and runnel beaches

Previous studies devoted to the morphology and hydrodynamics of ridge and runnel beaches highlight characteristics that deviate from those initially postulated by King and Williams (Geographical Journal, 1949, vol. 113, 70–85) and King (Beaches and Coasts, 1972, Edward Arnold). Disagreements on the morphodynamics of these macrotidal beaches include the position of the ridges relative to the mean neap and spring tide levels, the variation in the height of the ridges across the intertidal profile and, most importantly, whether the ridges are formed by swash or surf zone processes. The morphological characteristics of ridge and runnel beaches from three locations with varying wave, tidal and geomorphic settings were investigated to address these disagreements. Beach profiles from each site were analysed together with water‐level data collected from neighbouring ports. It was found that the ridges occur over the entire intertidal zone. On one site (north Lincolnshire, east England), the ridges are uniformly distributed over the intertidal beach, whereas on the two other sites (Blackpool beach, northwest England, and Leffrinckoucke beach, north France) there is some indication that the ridges appear to occur at preferential locations. Most significantly, the locations of the ridge crests were found to be unrelated to the positions on the intertidal profile where the water level is stationary for the longest time. It was further found that the highest ridges generally occur just above mid‐tide level where tidal non‐stationarity is greatest. These findings argue against the hypothesis that the ridges are formed by swash processes acting at stationary tide levels. It is tentatively suggested that the ridges are the result of a combination of swash and surf zone processes acting across the intertidal zone. Elucidation of the morphodynamic roles of these two types of processes, and other processes such as strong current flows in the runnels, requires further comprehensive field measurements complemented by numerical modelling. Copyright © 2001 John Wiley & Sons, Ltd.     

Trace Elements Analysis of Geological Samples by Laser Ablation Inductively Coupled Plasma Mass Spectrometry

ＩＮＴＲＯＤＵＣＴＩＯＮＬａｓｅｒａｂｌａｔｉｏｎｉｎｄｕｃｔｉｖｅｌｙｃｏｕｐｌｅｄｐｌａｓｍａｍａｓｓｓｐｅｃｔｒｏｍｅ ｔｒｙｉｓａｎｉｎｃｒｅａｓｉｎｇｌｙｄｅｖｅｌｏｐｅｄａｎａｌｙｔｉｃａｌｔｅｃｈｎｉｑｕｅｆｏｒｓｏｌｉｄｓａｍｐｌｅａｎａｌｙｓｉｓ.ＬＡ ＩＣＰ ＭＳｏｆｆｅｒｓａｔｔｒａｃｔｉｖｅｃｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆｈｉｇｈｓｅｎｓｉｔｉｖｉｔｙ ,ｌｏｗｄｅｔｅｃｔｉｏｎｌｉｍｉｔｓ,ｍｉｎｉｍａｌｓａｍｐｌｅｐｒｅｐａｒａ ｔｉｏｎ ,ｌｅｓｓｏｘｉｄｅｓｉｎｔｅｒｆｅ…     

金刚石碎岩工具胎体材料添加稀土元素的试验研究

对胎体材料中添加稀土元素问题进行了试验研究。对添加稀土和未加稀土的胎体性能进行测试，结果表明，添加稀土比未加稀土的胎体材料的抗弯强度、硬度和冲击韧性均有所提高，其中抗弯强度提高了10％－62％，冲击韧性提高了5％。胎体中添加稀土对提高胎体和金刚石碎岩工具的技术经济指标具有重要作用,并且为在胎体材料中实现以Fe代Co创造了有利条件。     

福州市温泉区地面沉降监测与沉降规律分析

应用精密水准测量方法，于１９９３年在温泉区取得三个周期的观测成果，结合以往资料进行综合分析，得出初步结论。并为福州市地下热水开采的控制、预防及减轻因沉降产生的地灾害方面提出有益的建议。     

自转微椭、非均匀地球的潮汐变形

鉴于当前国际上关于自转微椭、非均匀地球（ＳＲＥＨＩ）的固体潮汐响应的结果之间存在明显分歧，特别是Ｌｏｖｅ数ｋ及重力潮汐因子δ对纬度的依赖情况截然不同，本文借助于摄动法与张量正则分量的广义球谐展开建立起来的侧向非均匀、自转微椭、粘弹地球的潮汐模拟理论，计算了ＳＲＥＨＩ地球的潮汐形变及相应的引力位变化．结果表明，描述径向位移的Ｌｏｖｅ数的纬度依赖部分系数ｈ＿＋与球对称部分ｈ＿０＋δｈ＿０之比不大于１．０‰；对Ｏ＿１波为０．２７‰；对Ｍ＿２波为０．１９‰；对Ｍ＿３波为０．４９‰；对Ｍ＿４波为０．８８‰．描述地球引力位变化的Ｌｏｖｅ数的纬度依赖部分系数ｋ＿＋与球对称部分ｋ＿０＋δｋ＿０之比小于３．０‰；对Ｏ＿１波为２．６７‰；对Ｍ＿２波为１．８９‰；对Ｍ＿３波为２．２４‰；对Ｍ＿４波为２．７０‰．     

SNREI地球模型负荷勒夫数数值计算的新进展

基于Ｌｏｎｇｍａｎ和Ｆａｒｒｅｌｌ的表面负荷形变理论，深入研究计算ＳＮＲＥＩ弹性地球模型表面负荷勒夫数的数值计算方法，取得新的进展：采用了一种新的代换方法─ｒ￣ｎ因子法，比传统的无量纲化法简单易行，且能达到很高的计算精度；确立了检验表面边界条件、微分方程积分线性性和计算结果的收敛性，用于评价数值计算结果精度的有效准则；给出了ＰＲＥＭ地球模型的一组高精度计算结果．