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Such an observation can be best explained if Re and 187Os are internally decoupled within molybdenite grains.

这是因为Re和187Os在辉钼矿亚晶粒范围内出现了失耦现象，也就是由于放射性成因187Os的迁移使Re和187Os在空间上不再保持连接。

This dissertation got the deposit forming of Qulong copper porphyry copper deposit by SHRIMP zircon U-Pb and Re-Os molybdenite methods.

对驱龙铜钼矿床进行了锆石SHRIMP U-Pb同位素定年及辉钼矿Re-Os同位素定年，获得新的年龄数据：含矿斑岩锆石SHRIMP U-Pb年龄为16.35～17.58Ma，矿石的辉钼矿Re-Os同位素年龄为15.36～16.85Ma。

Re-Os dating for the same group of molybdenite samples using inductively coupled plasma mass spectrometry and negative thermal ion mass spectrometry determination after sample pretreatment with Carius tube digestion were compared.

对同一地区但Re、Os含量不同的一组辉钼矿样品，分别采用电感耦合等离子体质谱和负离子热表面电离质谱对其Re-Os年龄进行了测定比较。

The addition of Re slightly decreased the formation temperature of MC carbides and promoted the precipitation of μ phase from the oversaturated γ matrix.

Re不进入MC碳化物，Re的加入可降低MC形成温度并促进μ相从MC周围过饱和的γ基体中析出，进而诱发MC不稳定分解。

Based on the Re-Os isochron method of molybdenites, this paper measured directly the ore-forming age from skarn ore in the Huangshaping deposit, and got a Re-Os age of (153.8±4.8)Ma, which is in accordance with the previous K-Ar age of 153~157 Ma obtained from phlogopite in the ore-bearing skarn of the deposit.

文章采用高精度的辉钼矿Re-Os等时线定年法，直接测得硅卡岩型矿体的矿化年龄为(153.8±4.8)Ma，与前人获得的含矿硅卡岩中金云母的K-Ar年龄(153~157Ma)一致。

The results have shown that P-RE-USY has good hydrothermal stability owing to the migration of hydroxy rare earth cation from the super cages to the sodalite cages enhanced by phosphorus addition, inhibiting the frame...

结果表明，由于磷促进了稀土离子由超笼向方钠石笼中的迁移，阻止了沸石在水热条件下的脱铝作用，从而改善了P RE USY沸石的水热稳定性；P RE USY沸石酸性分布更集中在中强酸范围，有利于发生氢转移反应，而强酸数量的降低有利于减少焦炭形成，改善了焦炭选择性。

The composite of Ir/Re was prepared by chemical vapor deposition first in china. Iridium coatings and rhenium substrates were bonded together metallurgically.

本文结合国家&九五&重点科技攻关课题开展Ir/Re复合材料的制备基础与理论问题的研究工作，为成功制备Ir/Re复合喷管，顺利完成攻关任务提供了必要的技术理论支持。

If the RE/S ratio reached a critical value, namely about 4, not only the MnS inclusion is completely converted into sulphide and oxysulphide of RE, but also the prior austenite grain is remarkedly refined and their toughness is improved.

当RE/S达到临界比值(约为4)时，不仅使MnS夹杂物完全转变成稀土硫化物和稀土硫氧化物，而且使高温奥氏体晶粒显著细化，改善韧性。

There occure 10 stoichiometrical compounds with RE∶Ag=1∶5,2∶9,1∶4,14∶51,2∶7,1∶3,1∶2,1∶1,3∶2和5∶2 and 19 crystal structures,4 eutectic systems with 10 eutectic reactions,and 8 peritectic reactions in Ag-RE systems.

在Ag-RE系中出现1∶5、2∶9、1∶4、14∶51、2∶7、1∶3、1∶2、1∶1、3∶2和5∶2十种化学计量化合物和19种晶体结构，4个共晶系10种共晶反应和8种包晶反应。

82 Times as high as the flow rate at the inlet; the velocity profile in the lower region is relatively uniform, and changes at the exit from a parabolic shape towards a plug flow as Re increases; The strong circulating flow in the upper region is very favourable to evaporization of heated fluid because it not only forces all the heated fluid to flow through the liquid surface and, therefore, to evaporate effectively, but also causes a large part of fluid to recirculate to the liquid surface and, therefore, to get a second opportunity of evaporization. In addition, the uniform velocity profile in the lower region is also favourable to crystallizing process.

轴向进料蒸发室进口管侧上方有强烈的循环流存在，循环流流量为进口流量的1.48～1.82倍；循环流下部流速分布较均匀，出口区流速在低Re时为抛物线分布，高Re时接近活塞流；强烈循环流的存在不仅迫使加热流体全部流经液面及其附近进行充分蒸发，而且之后还使相当部分流体再次循环回到液面及附近进行二次蒸发，对蒸发操作十分有利；蒸发室下部流速的均匀分布亦有利于蒸发结晶过程。

Compared the voltage negative feedback wire-feeding speed regulation system supported by current positive feedback with the rotational speed negative feedback regulation system, the equivalent condition of the two systems is obtained. Then, a wire-feeding speed regulation circuit for the CO_2 welding machine is designed based on TL494 chip, which has the self-protective function under the condition of current overloading.

通过对电压负反馈配合电流正反馈的送丝调速系统与转速负反馈调速系统的比较，得出了这两种调速系统的等效条件，并采用电压负反馈配合电流正反馈技术，设计了一种以TL494为核心的具有过电流截止保护功能的CO_2焊机送丝调速电路。

Make a model to help you determine the optimal number of tollbooths to deploy in a barrier-toll plaza.

建立一个模型来确定在一个容易造成阻塞的收费区中应该设置的收费亭的最优数量。