磁化率

It is suggested that TDS can be used as a new method for the analysis of pedogenesis and climatic change.

总之，热处理过程中磁化率的变化能非常灵敏地反映磁性矿物的转化情况，而且，这种转化往往与样品所经历的土壤化作用强度密切相关，因此，TDS可做为分析成土作用强度和古气候变化的一种新方法。

In addition,the experimentalresults of the order parameter,correlation length,magnetic susceptibility[34] andthermal expansion given[36] show that the critical behavior in the Peierls transitioncan be described by three dimensional XY model.However,whether the specificheat behavior belongs to the universal class or not is not clear.

另外，文献[34]的序参量、关联长度和磁化率，以及文献[36]的热膨胀系数的实验结果分析表明，K0.3MoO3在派尔斯相变过程中的临界行为可用三维XY模型来描述，但其比热的临界行为是否也属于该普适类，目前并不清楚。

The copper atom is in a planar coordination site of [N_2O_2] and it devites from the mean plane by only 0.80 pm. Byπ-πstacking interactions, a alabastrine structure was obtained.(2)Schiff-base complex [Cu(H_2O)]·H_2O, where H3GS is the 3-carboxyl -salicylidene glycine, was synthesized and characterized by elemental analysis, IR spectra and single-crystal analysis. The crystal belongs to monoclinic system, space group P2(1)/c, a=848.46(3)pm, b=681.54(3)pm, c=1967.16(8)pm,β=95.8210(10)°, Z=4, R_1=0.0279, wR_2=0.0724. The copper atom is in a square-pyramidal field with the base

结果表明该晶系属单斜晶系，空间群P2(1)/c，晶胞参数：a=848.46(3)pm，b=681.54(3)pm，c=1967.16(8)pm，α=90°，β=95.8210(10)°，γ=90°，Z=4，R_1=0.0279，wR_2=0.0724，Cu原子位于轻微变形的四方锥场底心，底面被氮原子、酚氧原子、甘氨酸羧基的一个氧原子和一个水分子氧原子占据，而甘氨酸羧基的另一个氧原子占据相邻分子的锥顶，因而形成一维链状结构；合成了单核双聚配合物Na_2[Cu_2_2]·2H_2O ，铜三核配合物Cu_3_2·5H_2O和铜锌异三核配合物ZnCu_2_2·5H_2O，并用元素分析，IR光谱，电子光谱和磁化率测定对配合物的组

Multiple magnetic parameters such as magnetic susceptibility , anhysteretic remanent magnetization , saturation remanent magnetization , coercivities of SIRM , and S ratios (relative abundance of low-coercivity magnetic minerals) are measured for all 179 surface samples, and partial representative samples are examined for their magnetic hysteresis parameters, temperature-dependence of magnetic susceptibility and x-ray diffraction spectra.

对于全部179个海底表层沉积物样品，测量了多个磁学参数，如：磁化率、非磁滞剩磁、饱和等温剩磁、剩磁矫顽力、S比率（低矫顽力矿物的相对含量）。

Deferent plutons composing Linglong compositc granitoid batholith have deferent degrees of anisotropy of magnetic susceptibility.

组成玲珑花岗岩基的各个岩体具有不同的磁化率各向异性度。

The result of temperature dependence magnetic susceptibilities measurements indicates that weak ferromagnetic coupling interaction exists between Cu ions, which are connected by 4,4'-bipyridine.

变温磁化率测定结果表明，在配合物中，通过4，4'-联吡啶联接的Cu离子之间存在弱铁磁偶合作用。

Low magnetic susceptibility, low CaCO_3, low organic carbon concentration C_(org, low C/A (Chenopodiaceae/Artemisia) ratio, low Sr concentration and, hence, high Rb/Sr ratio in the lake sediments indicate a cold but moist climate during the global Little Ice Age in the Daihai area.

岱海地区小冰期最盛期是以高Rb/Sr比值、低磁化率、低CaCO_3、低C_、低C/A比和孢粉浓度的湖泊沉积为特征的，反映流域所经历的冷湿的气候环境。

If the supply of detrital materials was high, the average susceptibilityvalue would be higher, but there is still a correlation between susceptibility and sea levelcurves.

如果陆源物质供应高时，平均磁化率的值也会相应增高，但是与海平面变化还是有关联。

The magnetic susceptibility variation is controlled by lithology, early diagenetic and human activity.

EC2005孔磁化率变化受到多种因素的制约，如岩性粗细、早期成岩作用以及人类活动等的影响。

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 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。