Existing State and Partitioning of Rare Earth on Weathered Ores

The existing state and partitioning of rare earth （RE） on weathered ores in Longnan County（LN）, Xingfeng County（XF） and Ninghua County（NH） were characterized systematically by standard geological analytical methods. It is found that RE in the weathered rare earth ores exist as four phases： （a） water soluble, （b） ion-exchangeable, （c） colloidal sediment （oxides）, （d） minerals, in which mainly as ion exchangeable phase, accounting for nearly 80% of total RE, with about 20% in the form of colloid sediment phase and mineral phase, but very little as aqueous soluble phase. These rare earth partitioning were mainly chosen mid-heavy RE elements, occupying above 60%, but not equal in the four phases. The mid-heavy RE elements were primarily enriched in the ion exchangeable phase up to 40%, while the containment of cerium dioxide is below 2 %. The cerium deficiency occurs in the ion exchangeable phase in weathered ore. It results from that the Ce^3＋ is oxidized into Ce^4＋ and changes into CeO2. For LN ore, the containment of Y is high in weathered ore because Y-minerals are abundant in original rock.     

全遥控式原油水的质量分数监测仪

我国石油化工行业原油各生产加工环节的水的质量分数计量主要是靠原始的蒸馏化验方法来完成。介绍了一种先进的全遥控式原油水的质量分数监测仪,说明了其主要工作原理,提出了关键问题的解决办法,给出了全遥控式测量仪器的应用实例。     

一类完备格的商集的讨论

介绍了完全分配格、交连续格的商集、子代数、同态的概念．证明了完全分配格的笛卡儿乘积仍然是笛卡儿乘积，完全分配格的子代数仍为完全分配格，完全分配格在满同态作用下象为完全分配格，最后得出了关于商集的重要结论，类似地给出了交连续格的结论．     

C上全纯自映射的完全不变域

设ｆ（ｚ）是Ｃ上全纯自映射，０和是它的本性奇点，其中本文讨论ｆ（ｚ）的完全不变域的性质，证明了如果Ｄ是ｆ（ｚ）的完全不变域，那么Ｄ一定是二连通的且Ｄ包含了的奇异值集；此外，如果ｆ（ｚ）是有限型的，则Ｄ＝Ｆ（ｆ）．由此结论可以推出ｆ（ｚ）最多只有一个完全不变域在Ｆ（ｆ）中     

Numerical Simulation of Rigid Projectile''''s Normally Penetrating into Granite Targets

The process of penetrating into granite was simulated by using program LS-DYNA3D. The granite was represented by the isotropic elastic-plastic model with failure criterion and the projectile was modeled by rigid model. The depth of penetration from simulations is identical with experiments. Penetration deceleration vs striking velocity was acquired at the same time, which can assist in the design of penetration weapons with payload and fuse. Through numerical simulation, that material model is considered with straightforward physical meaning, a few parameters which can be determined easily are more practical for engineering calculation along with experiments.     

Consideration on Effective Diffusivity of Strontium in Granite

Abstract

Diffusive behavior of strontium and certain kinds of divalent cations in Inada granite were studied by a through-diffusion method. In order to examine the effect of sorption onto overall diffusive behavior, two kinds of solutions were used: 0.1M KCl solution and deionized water. The effective diffusion coefficient (D_e ) and rock capacity factor (a) were (2.0–3.6) xl0–¹³ m²/s and less than 0.022 in 0.1M KCl solution and (0.32–1.7) x 10 ^?13m²/s and 1.5–2.4 in deionized water respectively. The D_e , and α in deionized water were much larger than those in 0.1M KCl solution. These results are well explained by taking into account the diffusion of sorbed ion or the surface diffusion. In support of this mechanism, most D_e , values of Sr reported for various rocks are found proportional to the sorptivity ( _ρR_d )-In the case that the sorptivity is low, D_e of Sr depends on porosity like that of nonsorbed iodide. The effective diffusion coefficient of Sr in rocks was well explained by taking into account pore and surface diffusion and was expressed as D_e=2.1 xl0^?10 _? ^1.3+3.5xl0″^?12 _ρR_d . The effective diffusion coefficient of divalent cations in the granite was found proportional to their diffusion coefficients in bulk solution.     

赤峰市喀喇沁旗金矿成矿地质条件及资源潜力

喀喇沁旗位于华北地台北缘中段槽台交界处台区一侧，ＥＷ向超岩石圈断裂与ＮＥ（ＮＮＥ）向新华夏构造体系交汇处．境内晚太古宙含金绿岩建造、元古宙浊积岩建造，以及燕山期金铜系列花岗岩广泛出露．中生代地台活化过程中造成的含金结晶基底重熔及构造活化作用使该区广泛发育显生宙花岗岩建造全矿床、绿岩建造金矿床和浊积岩建造金矿床．根据活化成矿理论估算的全旗金矿资源总量在２５０ｔ以上。     

稀土夹杂物对D6AC超高强度钢力学性能的影响

本文研究了稀土夹杂物含量对Ｄ６ＡＣ钢强度和塑性的影响，得出了夹杂物的体积百分率与断面收缩率的定量关系式。从夹杂物尺寸和数量方面探讨了对Ｄ６ＡＣ钢韧性的影响。并提出了改善性能的途径。     

姑婆山花岗岩体断裂构造样式方向特征多尺度定量遥感研究

姑婆山花岗岩体的断裂构造系统具有多层环形构造与密集的放射状断裂构造穿插组合,放射状断裂构造的长度密度分布依方位角区间而异的复杂构造样式。为定量研究这种构造样式的方向特征,以3种空间分辨率尺度的卫星遥感影像——资源-2号、Aster和ETM＋数据为信息源,对岩体遥感线性特征开展了依SN、NE、NW、EW方向的分解提取,在4个方位角区间内共解译线性构造2 513条,总长度为1 997.76 km。在此基础上,开展了线性构造方向密度分割、方向趋势分析和3D数字模拟定量遥感分析,并以线性构造等密度第10次趋势面类比模拟岩体断裂构造应力场分布,分析了张应力致断作用过程,探讨了不同走向断裂构造密度分布与致断张应力场作用方向的关系。研究表明,姑婆山花岗岩体断裂构造高密度区围绕花岗岩体呈不均匀环形分布,以岩体SE部位的密度强度和范围最大,方向密度分布的优势排序为：NE走向（最优势）→NW走向（优势）→EW走向（一般优势）→SN走向（无优势）。岩体内部致断应力场方向与断裂构造走向呈正交关系,分别具有EW、NW、NE、SN方向的趋势矢量方向。这些特征为判定姑婆山花岗岩体成岩受力环境提供了证据。     

三维动静组合加载下花岗岩能量耗散试验研究

利用改造的三维霍普金森试验系统(split Hopkinson pressure bar, SHPB),选取4个轴压水平(25, 50, 75和100 MPa)和4个围压水平(0, 5, 10和15 MPa),对应开展4种应变率(约70, 90, 110和130 s^-1)下花岗岩三维动静组合加载试验研究,分析静载轴压、静载围压和应变率对花岗岩受冲击过程中能量耗散的影响规律,并讨论其破坏模式。试验结果表明:轴压增大时,花岗岩破坏时单位体积吸收能逐渐降低;围压或应变率增大时,单位体积吸收能逐渐升高。岩石储能极限在能量耗散过程中发挥关键作用,且不同情况下具体表现不同:储能极限与初始储能的差值影响岩石受冲击时的吸能值;当岩石在静载下进入损伤阶段初期时,储能极限与初始储能的比值决定岩石受冲击时的释能值;当岩石在静载下进入损伤阶段后期甚至发生屈服时,储能极限值正比于岩石释能值。此外,岩石破坏模式与单位体积耗散能关系密切:应变率相似静载组合变化时,破碎程度与单位体积吸收能变化呈负相关;静载组合确定应变率梯度变化时,破碎程度与单位体积吸收能变化呈正相关。