Fe层厚度对Fe／Mo多层膜巨磁电阻的影响

详细研究了用溅射法制备的Ｆｅ／Ｍｏ多层膜系统的结构，磁性及磁电阻效应。发现当保护Ｍｏ层厚度为０．８ｎｍ、Ｆｅ层厚度ｄＦｅ由２．２ｎ，减到０．４ｎｍ时，ＧＭＲ在ｄＦｅ〈１．４ｎｍ有一迅速增加，并在ｄＦｅ＝０．９ｎｍ时达极大值，然后下降，矫顽力显示出类似的行为。     

超微磁性Fe3O4粒子的制备

本文选用２ＮＨ３．Ｈ２Ｏ作沉淀剂，用共沉淀的方法制备出了超微磁性粒子（５－１００ｎｍ），优化了最佳的制备流程，着重研究了熟化对Ｆｅ３Ｏ４粒子的磁性能的影响，并对此影响提供了理论的分析和研究。     

Ca_8Mg（SiO_4）_4Cl_2中Ce~（3＋）的光谱与晶体学格位

合成了新型蓝色光致发光材料Ｃａ８Ｍｇ（ＳｉＯ４）４Ｃｌ２：Ｃｅ（３＋），并对其进行了光谱测试．分析了Ｃｅ（３＋）在Ｃａ８Ｍｇ（ＳｉＯ４）４Ｃｌ２晶体中应占据的晶体学格位．测试结果表明，在紫外光激发下，Ｃａ８Ｍｇ（ＳｉＯ４）４Ｃｌ２：Ｃｅ（３＋）的发射光谱为一峰位在４１０ｎｍ～４２５ｎｍ之间的宽谱带，经分析确认作为发光中心的Ｃｅ（３＋）占据Ｃａ８Ｍｇ（ＳｉＯ４）４Ｃｌ２晶体中多面体八配位的Ｃａ（Ⅱ）格位．     

平炉尘综合利用二例

利用包钢平炉生制备了磁性铁氧体（Ｆｅ３Ｏ４），并使用表面活性剂可以获得粒径控制在１００ｎｍ以内的Ｆｅ３Ｏ４成为磁性超细粉．用此法可以制备其它种铁氧体．同时用平炉尘制备了中温变换催化剂，成本低，工艺简单，活性达到化工部部颁标准．具有明显的经济效益．以上的研究可为平炉尘的综合利用开辟新途径，也是环境保护措施之一．目前还未见到此类报导．     

磁场作用下Fe3O4磁性液体薄膜形貌和热效应

利用化学共沉淀法制备纳米Ｆｅ３Ｏ４微粒,并制成磁性液体。研究磁怀液体薄膜在不同磁场下的形貌变化。用磁热重分析技术（ＭＴＧＡ）研究纳米Ｆｅ３Ｏ４微粒样品加热过程的相变。初步测量在高频电磁场下纳米Ｆｅ３Ｏ４微粒混合物的发热效应。     

Eu_（1－x）Sr_xFeO_（3－y）的~（57）Fe Mossbauer谱

报导Ｅｕ＿（１－ｘ）Ｓｒ＿ｘＦｅＯ＿（３－ｙ）（ｘ＝０．０～１．０）的固相反应法合成，测量了其Ｘ射线衍射及室温下的￣５７ＦｅＭｏｓｓｂａｕｅｒ谱。实验结果表明，Ｓｒ掺入了ＥｕＦｅＯ＿３晶格，结构变化与掺杂量密切相关。室温下￣５７ＦｅＭｏｓｓｂａｕｅｒ谱由一套反铁磁六线谱、一套顺磁双线谱和一套顺磁单线谱组成（Ｘ＝０．２，０．４，０．６）．处于立方相的Ｆｅ离子的ＩＳ介于Ｆｅ￣３＋和Ｆｅ￣４＋之间，可能参与电子跳跃。     

Dy2（Fe1－xGax）17化合物的57FeMssbauer谱和磁性质研究

对Ｄｙ２（Ｆｅ１－ｘＧａｘ）１７化合物的磁性和Ｍｓｓｂａｕｅｒ效应进行了系统的研究．Ｇａ对Ｆｅ的有序替代导致化合物的居里温度的变化,并且在Ｇａ浓度ｘ＝０．２时有极大值．Ｍｓｓｂａｕｅｒ谱分析表明,化合物内禀性质的变化与Ｇａ原子择优占据结构中１２ｊ,４ｆ,６ｇ晶位有关．     

α-Fe_2O_3超微粉磁特性的Raman光谱研究

用磁测量和Ｒａｍ ａｎ 光谱方法研究了尺寸和Ｃｏ２＋ 包附对αＦｅ２Ｏ３超微粉Ｍｏｒｉｎ 相变温度ＴＭ 的影响⒚随着样品尺寸的减小, ＴＭ 逐渐下降⒚Ｃｏ２＋ 包附可使１５０ｎｍ 的αＦｅ２Ｏ３超微粉的ＴＭ 从１９１Ｋ 降至７７Ｋ 以下⒚Ｒａｍ ａｎ 光谱测量显示αＦｅ２Ｏ３的光学声子频率随样品尺寸的减小而移向低频方向,暗示Ｆｅ３＋ 磁性离子与配位氧离子的键合减弱⒚此外还观察到声子谱因粒度减小和表面包附而发生了宽化⒚表明小粒子晶体中的原子间距不是单值,而是呈现某种分布⒚单离子各向异性能和磁性离子位能估算表明Ｆｅ３＋ 和Ｏ２－ 的距离因Ｃｏ２＋ 包附而增大,使单离子各向异性能减弱,导致Ｍｏｒｉｎ 相变温度下降     

纺锤型γ－FeOOH的合成及其热分析研究

采用空气氧化ＦｅＳＯ４与Ｎａ２ＣＯ３作用生成的Ｆｅ（ＣＯ３）ｘ（ＯＨ）２（１－ｘ）悬浮液体系，通过稀土离子Ｙ３＋的掺杂合成出均匀纺锤型铁黄γ－ＦｅＯＯＨ微晶．由ＤＴＡ－ＴＧ和ＸＲＤ分析得出γ－ＦｅＯＯＨ随温度升高，发生如下相变过程：γ－ＦｅＯＯＨ→γ－Ｆｅ２Ｏ３→α－Ｆｅ２Ｏ３．本文还对γ－ＦｅＯＯＨ的脱水过程机制和以γ－ＦｅＯＯＨ为中间体经热处理制备的纺锤形γ－Ｆｅ２Ｏ３磁性能作了初步探讨．     

MgTiO3晶体中3d^5离子的占位研究

用叠加模型分析晶场参量，用微扰法计算ＭｇＴｉＯ３晶体中Ｍｎ２＋和Ｆｅ３＋离子的零场分裂（ＺＦＳ）参量ｂ０２，ｂ０４和ｂ３４．将计算值与实验值比较，确定了３ｄ５离子的占位和移动．对于ＭｇＴｉＯ３：Ｍｎ２＋，Ｍｎ２＋可能替代Ｍｇ２＋离子，且不发生移动；对于ＭｇＴｉＯ３：Ｆｅ３＋，Ｆｅ３＋同时替代Ｍｇ２＋和Ｔｉ４＋离子，且分别向八面体中心移动０．００８９ｎｍ和０．０１６ｎｍ．     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.