ZnO对堇青石体系的结构与红外辐射性能的影响

采用固相反应法制备名义组成为Mg2(1-x)Zn2xAl4Si5O18(x=0-0.6)的红外辐射材料，测试了样品的红外辐射性能，并用XRD、IR等方法研究了体系的结构．研究结果表明，x≤0．3时，可得到六方结构的堇青石固溶体，x=0．2时，样品的红外辐射性能最佳，其法向全波段的辐射率达到0．89，8～14μm波段的辐射率达到0．91以上．x＞0．2时样品的红外辐射性能随x的增大而降低，x≥0．4时样品中主要形成(Mg1-xZnx)Al2O4尖晶石固溶体和方石英．     

新型高温陶瓷涂料

新型高温陶瓷涂料本技术涉及的是一种新型锆基高温陶瓷涂料，该涂料具有很高的耐热冲击、耐溶浸蚀及耐腐蚀性气体作用的能力．该产品为白色粉料或稠浆体，涂层固化后能经受２０００℃以上的高温，辐射系数７５％左右，气孔率＜０．１％，与涂施面的结合性能好，可广泛应用...     

尖晶石型铁氧体红外辐射陶瓷的结构与性能研究

采用Fe2O3、MnO2、CuO、Co2O3为主要原料,制得铁氧体样品.测量了样品的红外辐射率,用XRD分析了样品的物相,用SEM研究了样品的微观形貌,用EPMA研究了样品的元素面分布,用XPS研究了样品中Fe、Mn、Co、Cu元素的价态分布.结果表明,样品的红外辐射率很高,全波段辐射率高达0.87,8～14!m光谱辐射率均大于等于0.90,是优良的红外辐射陶瓷;样品中,CoFe2O4和MnFe2O4、CuFe2O4、CuMn2O4等彼此以固溶体的形式存在,形成了复杂的多组份铁氧体,基本属于混合尖晶石型结构,结晶良好;铁氧体中,Fe、Mn、Co元素离子均以三价和二价共存.     

镁铝尖晶石对方镁石-复合尖晶石砖性能及抗V2O5侵蚀性的影响

以高纯镁砂、高铁镁砂、铁铝尖晶石砂、镁铝尖晶石为原料,于1600℃烧成制备了方镁石-复合尖晶石试样,研究不同镁铝尖晶石对试样性能的影响,采用SEM观察和分析了V2O5气氛侵蚀后试样的微观形貌。结果表明：添加75MA和90MA的试样,显气孔率随着尖晶石含量的增加先增加后降低;添加66MA的试样,显气孔率随着尖晶石含量增加而增加;添加三种尖晶石的试样,耐压强度、高温抗折强度均随着尖晶石含量增加而降低;添加12%75MA和90MA试样的热震稳定性好于添加66MA的试样;添加90MA的试样,尖晶石含量越高,试样的抗侵蚀性越好;添加66MA尖晶石的试样,尖晶石含量越高,试样的抗侵蚀性越差;当试样中MA含量相同时,Al2O3含量越高,试样的抗V2O5侵蚀性越好。     

镁质复合滑板材料的研究与开发

以优质电熔镁砂、烧结镁铝尖晶石为主要原料,采用纸浆废液作为结合剂研究镁质复合滑板材料.为了提高材料的热震稳定性,在基质中加入一定量电熔镁砂、镁铝尖晶石和α-Al 2O 3细粉.原料经过混炼、成型、干燥后在1 760 ℃的高温隧道窑中烧成.通过对试样进行性能检测与分析得出结论:对于镁质复合材料,尖晶石以预合成形式或以再生形式加入在基质中,随着加入量增加,材料的热震稳定性都提高,常温耐压强度先降低后增大.     

原位反应烧结制备熔盐/尖晶石复合高温相变储能材料的研究

以电熔镁砂和白刚玉为镁铝尖晶石陶瓷基体原料,以氯化钾、氟化钾复合盐为相变材料,用原位反应烧结法制备熔盐/尖晶石复合高温相变储能材料,研究烧结温度、熔盐含量对熔盐/尖晶石相变储能材料性能的影响.采用XRD和SEM对材料进行表征,通过DSC分析测定材料相变潜热,结果表明,烧结温度为1 000 ℃和熔盐含量为40%时,所制备的储能材料的相变潜热为70.98 kJ/kg,蓄热密度为240 kJ/kg(ΔT=100 ℃),储热性能较好.     

镁质复合滑板材料的研究与开发

以优质电熔镁砂、烧结镁铝尖晶石为主要原料，采用纸浆废液作为结合剂研究镁质复合滑板材料。为了提高材料的热震稳定性，在基质中加入一定量电熔镁砂、镁铝尖晶石和α—Al2O3细粉。原料经过混炼、成型、干燥后在1760℃的高温隧道窑中烧成。通过对试样进行性能检测与分析得出结论：对于镁质复合材料，尖晶石以预合成形式或以再生形式加入在基质中，随着加入量增加，材料的热震稳定性都提高，常温耐压强度先降低后增大。     

尖晶石结构氧化物材料的制备及红外光谱研究

以铜、铁、锰的氧化物和Co(NO3)2·6H2O为原料,在1150℃的温度下采用固态反应法,制备了尖晶石结构为主相的氧化物材料,研究了处理温度、厚度、配比、颗粒度等对红外发射率的影响.材料的高温红外发射率可能归因于氧化物材料的尖晶石结构.     

尖晶石-氧化锆复合材料的制备与性能

以高纯镁砂、煅烧Al2O3、稳定氧化锆为原料,以2%的TiO2为烧结添加剂,试样经100 MPa压力成形后,在1600℃3 h下烧成,制备出尖晶石-氧化锆复合材料.研究了氧化锆及氧化钛烧结添加荆对复合材料烧结性能、抗热震性能等的影响.试验研究结果表明:在MA尖晶石配料中引入10%的ZrO2,MAZ试样的抗热震性能优于MA尖晶石试样.引入TiO2 2%的MAZ-T复合材料试样结构致密,晶粒间为直接结合状态,体积密度达3.42g·cm-3,抗折强度为48.54 MPa,抗热震性能提高,该MAZ-T复合材料有希望用作水泥回转窑烧成带耐火材料.     

尖晶石-氧化锆复合材料的制备与性能

以高纯镁砂、煅烧Al2O3、稳定氧化锆为原料,以2%的TiO2为烧结添加剂,试样经100 MPa压力成形后,在1600℃3 h下烧成,制备出尖晶石-氧化锆复合材料。研究了氧化锆及氧化钛烧结添加剂对复合材料烧结性能、抗热震性能等的影响。试验研究结果表明：在MA尖晶石配料中引入10%的ZrO2,MAZ试样的抗热震性能优于MA尖晶石试样。引入TiO22%的MAZ-T复合材料试样结构致密,晶粒间为直接结合状态,体积密度达3.42g.cm-3,抗折强度为48.54 MPa,抗热震性能提高,该MAZ-T复合材料有希望用作水泥回转窑烧成带耐火材料。     

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.     

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.     

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.     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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