Fe—Re合金高温摩擦特性研究

熔制了６种不同含铼量的Ｆｅ－Ｒｅ合金，通过测定合金磨擦系数和磨损率，找出了合合适的含Ｒｅ量。Ｆｅ－Ｒｅ合金高温摩擦后表面形成釉质层，它由延性氧化物及变化形合金组成的亚表层所支持。承载氧化层中高硬度台阶的出现是合金高温耐磨的根据，在磨屑及氧化层中分布有铼的氧化物及铼酸铁则起 高温润滑作用。     

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．     

FeO4^2—离子在水溶液中稳定性的研究

报导氢氧化铁对ＦｅＯ４＾２－水解反应的催化作用及温度、浓度、碱度等对ＦｅＯ４＾２－稳定性的影响ＦｅＯ４＾２－的稳定性随体系中Ｆｅ（ＯＨ）３的增多和ＦｅＯ４＾２＿浓度增大而变小;当ＯＨ浓度低于１．０ｍｏｌ／Ｌ时,ＦｅＯ＾４＾２－的稳定性不受碱度影响;在室温下,ＦｅＯ４＾２－的稀溶液是稳定的。用这些重要规律指导高铁钾的合成,取得满意的结果。     

原位反应生成Al-Fe/Al_2O_3,Al-Cu/Al_2O_3复合材料的过程原理

采用喷射共沉积法制备了Ａｌ－Ｆｅ２Ｏ３及Ａｌ－ＣｕＯ复合体，Ｆｅ和Ｃｕ的质量分数分别为９．６０％和５．５０％．在热处理过程中，随着温度由６００℃升高到８００℃和１０００℃，Ｆｅ３Ｏ４按Ｆｅ３Ｏ４ＦｅＯＦｅ顺序被还原，得到Ａｌ－Ｆｅ／Ａｌ２Ｏ３复合材料，其中Ｆｅ以Ａｌ１３Ｆｅ４相及ＡｌＦｅ相形式存在．Ａｌ２Ｏ３粒度为２～４μｍ均匀分布在基体中．Ａｌ／ＣｕＯ复合体在９００℃处理后，形成Ａｌ－Ｃｕ／Ａｌ２Ｏ３复合材料．文中对显微结构形成、反应进行的过程作了分析．     

掺锑α－Fe_2O_3超微粉材料的晶粒生长、微结构与气敏特性

用化学共沉淀法制得掺有一定量锑离子的α－Ｆｅ２Ｏ３，超微粉料．ＴＧ－ＤＴＡ、ＸＲＤ及ＳＥＭ等分析表明，掺锑量（Ｓｂ／Ｆｅ原子比）小于０．２时，材料仍保持α－Ｆｅ２Ｏ３的晶体结构，但其晶化温度随Ｓｂ含量的增加向高温区移动；在低温段纯α－Ｆｅ２Ｏ３的晶粒生长活化能（Ｑ＝１０．３ｋＪ／ｍｏｌ）远小于Ｓｂ／Ｆｅ＝０．１（Ｑ＝３５．３ｋＪ／ｍｏｌ）粉料的活化能；Ｓｂ５＋取代α－Ｆｅ２Ｏ３晶粒中Ｆｅ３＋格位与在４５０℃下长期工作粉料颗粒不易长大，是造成掺锑α－Ｆｅ２Ｏ３元件电阻降低一个多数量级及气敏性能显著改善的主要原因．     

铁基合金上几种常见氧化层开裂及剥落的声发射研究

用声发射（ＡＥ）技术研究了铁基合金上几种常见氧化层在恒温氧化和随后冷却过程中发生的开裂及剥落行为。获得了ＡＥ累积计数及温度对时间的变化曲线。通过显微镜、扫描电镜的观察和Ｘ射线射衍物相分析，确定了实验合金表面氧化层的主要物相。结果表明：除了加Ｓｉ合金的氧化层在恒温氧化过程已开裂外，其余合金的氧化层均在冷却时开裂并剥落。Ｆｅ２５Ｃｒ－１０Ａｌ合金上α－Ａｌ２Ｏ３层的开裂及剥落最为剧烈。Ｆｅ－２５Ｃｒ－７．５Ｎｂ合金的Ｃｒ２Ｏ３层ＡＥ总计数远远高于Ｆｅ－２５Ｃｒ合金。而Ｆｅ－２５Ｃｒ－４Ｔｉ和Ｆｅ－２５Ｃｒ－９Ｍｎ的情况与Ｆｅ－２５Ｃｒ大体相同。     

工业条件下铁钼氧化物催化剂上甲醇氧化反应的复杂振荡

在工业条件下，观察到甲醇在Ｆｅ２（ＭｏＯ４）３－ＭｏＯ３催化剂上的氧化反应发生强烈的自振荡，反应温度及尾气成分呈现周期性变化。振荡参数与反应温度、进料流速以及原料气中甲醇浓度有关，但不受原料气中氧浓度的影响，用原位红外技术检测到ＭｏＯ３及Ｆｅ２（ＭｏＯ４）３中Ｍｏ＝Ｏ双键的振荡有着不同的相位，说明振荡过程伴随着晶格氧的转移及金属离子价态的变化。这些变化造成反应速度的负反馈，从而产生振荡。用多种手段研究了铁和铂之间的协同效应，并提出了协同作用机理及避免振荡的措施。     

Fe（Ⅱ）离子对γ—FeOOH相转化为α—Fe2O3的影响

研究了ＦｅＳＯ４浓度及ｐＨ值（４～８）对γＦｅＯＯＨ在（９９±１）℃下相转化为αＦｅ２Ｏ３的影响．结果表明，Ｆｅ（Ⅱ）／Ｆｅ（Ⅲ）为３％～５％及ｐＨ值为近中性时相转化时间最短．指出Ｆｅ（Ⅱ）离子对γＦｅＯＯＨ的促进作用为ＦｅＯＨ＋吸附在γＦｅＯＯＨ表面使其溶解造成的．     

固体（NH_4）_2SO_4－Fe_2O_3体系的IR和XPS研究

用红外光谱（ＩＲ）和Ｘ射线光电子能谱（ＸＰＳ）对用研磨法制得的（ＮＨ４）２ＳＯ４－Ｆｅ２Ｏ３样品进行了表征。并将表征结果与其催化性能关联。研究结果表明，热处理时存在着（ＮＨ４）２ＳＯ４在Ｆｅ２Ｏ３表面上自发分散过程。同时在表面形成Ｓ－Ｆｅ配合物。随着处理温度的升高，表面Ｓ－Ｆｅ配合物含量逐步增大，５７３Ｋ时达极大值。此时催化反应活性最大。超过５７３Ｋ，随着处理温度升高，表面Ｓ－Ｆｅ配合物分解，此时催化反应活性也相应降低。     

Fe_3O_4与Cr_2O_3在过氧化氢─柠檬酸中的溶解特性研究

研究了粒径为０．０４８～０．０５０ｍｍＦｅ３Ｏ４与Ｃｒ２Ｏ３在过氧化氢－柠檬酸水溶液中的溶解特性．单一组分的Ｈ２Ｏ２和柠檬酸分别对Ｃｒ２Ｏ３和Ｆｅ３Ｏ４有较高的溶解量，而混合体系则大大降低了Ｃｒ２Ｏ３和Ｆｅ３Ｏ４的溶解量；Ｆｅ３Ｏ４在混合体系中的溶解量随ｐＨ的升高而降低，随温度的升高而升高，在用振荡溶液保持固体颗粒悬浮状态的情况下，在６０分钟内能达到络合溶解平衡；Ｃｒ２Ｏ３在混合体系中的溶解量，在改变ｐＨ、温度和振荡时间的情况下均变化不大．     

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.     

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.     

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.     

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.     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

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.