磁化

The numerical simulation are consistent with the analytical results contained in chapter 2. In chapter 4, Mapping and chaos .We plot poincare cross-sections, the results illuminate that the two electrostatic waves which satisfy the resonant criterion found in this paper have more effective stochastic acceleration than nonresonant condition.

第四章：通过计算相空间的庞加莱截面和粒子的速度分布曲线，说明在对磁化等离子体加热方面，满足共振条件的两个静电波具有优越性。

The least loss of the magnetization due to As diffusion has been found forFe overlayer grown on the surface covered with stable GaxS layer with well-ordered sites andlittle excess As.

结果显示，表面退火后富Ga的GaxS钝化层的状态以及表面富余As的存在，决定了生长在这一衬底上Fe薄膜的磁化强度。

Based on this idea, the author has chosen two typical loess sections of Luochuan, and Xifeng for this study, collected the successive loess columns; To probe the conditional experiments of BeO sample preparation and measurement, and improve the existing method; On the basis of the technology improvement, the author has finished 402 samples' BeO preparation and AMS measurement; Also at the same time, to separate quartz from samples at 1 cm interval for both Luochuan and Xifeng sections systematically, to carry out measurements of quartz grain-size, SUS, grey scale, carbonate content and bulk sample density; By using the grain size model, the author has set up the chronological framework for both Luochuan, and Xifeng sections and the time sequence of millennial scale abrupt climate events recorded in loess strata, and reconstructed the East Asian monsoon history over 130ka by using multi proxies; Finally, to discuss the possible mechanisms of palaeoclimatic changes tentatively.

详细地球科学的发展离不开高精度和高分辨率的研究。运用长寿命核素如〓Be作为环境过程的示踪，已成为不可替代的有效工具。本论文选择洛川、西峰两个典型的黄土剖面，连续采集柱状样；探索了BeO样品制备、测量的条件实验，改进了原有的方法，完成了402个BeO样品的制备和AMS测量；同时还系统地分离洛川、西峰剖面高分辨率（1cm）黄土、古土壤样品中的碎屑石英，测量了碎屑石英粒度，以及全样的磁化率、灰度、碳酸盐含量和容重等古气候代用指标；采用粒度年代模式建立了洛川剖面和西峰剖面的年代标尺，建立了黄土地层记录的千年尺度的气候突变事件的时间序列，多指标重建了最近130ka东亚季风变迁史；初步讨论了古气候变迁的可能机制。

The paleoclimatic implication of susceptibility and carbonates content is not clear, and they can't be used as strict proxy.

黄土-古土壤中的磁化率值和碳酸钙含量古气候意义不明确，仅可作为参考气候代用指标。

It is indicated that the changes in magnetic susceptibility and grain size may record the paleoclimatic fluctuations of the last glacial.

但是，根据粗颗粒(＞60μm)在空间上的变化和磁化率的变化显示冰期时陆架可能并未达到沙漠化的程度。

Magnetic susceptibility (χ, mass-specific; or κ, volume-specific) has been widely used for paleoclimatic and paleoenvironmental studies.

作为地质与环境演化过程的替代指标，磁化率被广泛地用来研究各种与古气候和环境演化相关的问题。

Thirdly, in reproducing pedological process and sandstorm activity, grain- size, magnetic susceptibility , Calcium carbonate and pH value of soil four indexes have good instructions.

三在再现成壤环境及沙尘暴活动时，粒度、磁化率、碳酸钙和土壤pH值这四项指标有着较好的指示意义，而且各指标之间对应良好。

A pyrophoric alloy of iron with cerium; used for lighter flints.

镍和铁的合金，易于磁化和消磁。

In addition, the remanent magnetization vector field can not be transformed into potential field in general.

对地磁场的观测是在地表或卫星高度这样的球面上完成的，且岩石层的剩余磁化强度矢量场一般不能转换为位势场，因此需要研究球面各向同性随机矢量场。

A non-contact drive and control method on capsule type micro robot was proposed, in which exterior permanent magnet driver was composed of multiple tegular magnetic poles magnetized in radial direction, while interior permanent magnet driver built in robot was in the same structure as exterior one.

摘要提出一种以径向磁化的瓦状多磁极组成的圆筒式永磁体为外驱动器，以嵌入机器人本体内与外驱动器同磁极结构的永磁体为内驱动器的非接触式驱动控制方案。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。