高频感应加热法制备了SrTiO3BLC半导瓷

采用真空高频感应加热法制备ＳｒＴｉＯ３晶界层电容器半导瓷，研究了掺杂材料、参 、烧结温度、保温时间、成型密度等对半导瓷性能结构的影响，所制备的半导 经二次烧结成的ＳｒＴｉＯ３ＢＬＣ其视在介电常数Ｋｅｆｆ〉３×１０＾４，损耗角正切ｔａｎδ≈１０＾－２，绝缘电阻率ρ〉１０＾１０Ω．ｃｍ。     

2F4特性瓷料中SrTiO3的改性作用

研究了２Ｆ４特性瓷料中加入少量ＳｒＴｉＯ３及ＳｒＴｉＯ３的加入方式对材料介电性能和窑业性能的影响．试验表明，在以ＢａＴｉＯ３－ＣａＳｎＯ３为主的２Ｆ４特性瓷料中加入少量的ＳｒＴｉＯ３有明显的改性作用．ＳｒＴｉＯ３的加入使瓷料居里峰展宽、负温度特性变好、介质损耗降低，耐电强度提高．ＳｒＴｉＯ３加入方式明显影响烧结性能．先将ＢａＣＯ３、Ｓｒ－ＣＯ３、ＴｉＯ２共同合成（Ｂａ１－ＸＳｒＸ）ＴｉＯ３固溶体再进行配料烧结的比用ＢａＴｉＯ３、ＳｒＴｉＯ３进行配料烧结的有较宽的烧成范围和较好的耐潮性．     

工艺对SrTiO3—MgTiO3—Bi2O3·nTiO2系陶瓷结构和性能的影响

研究了ＳｒＴｉＯ３－ＭｇＴｉＯ３－Ｂｉ２Ｏ３ｎＴｉＯ２系陶瓷的初始原料及合成工艺对材料结构和性能的影响．研究表明，采用不同初始原料和合成工艺制成的材料的结构和性能差别很大．以ＳｒＴｉＯ３、碱式碳酸镁、ＴｉＯ２为初始原料以及经过预先合成烧块的工艺，有利于Ｍｇ２＋和Ｂｉ３＋在ＳｒＴｉＯ３晶格中发生电价补偿置换，促进Ｂｉ２Ｏ３ｎＴｉＯ２在ＳｒＴｉＯ３中的固溶，并可获得充分烧结的、电性能优异的高介低损耗瓷料     

掺SrLi1／4Nb3／4O3的SrTiO3氧敏材料特性的研究

利用Ｈ２／Ｈ２Ｏ体系控制氧分压，采用四电极法测量了掺杂ＳｒＬｉ１／４Ｎｂ３／４Ｏ３的ＳｒＴｉＯ３瓷体在８００～１２００℃，ＰＯ２＝１０－１５～１０５Ｐａ下的电导率，当ｐ＜１００Ｐａ，σ∝Ｐ－１／８Ｏ２；ｐＯ２≥１００Ｐａ，电导率随ｐＯ２变化较为平缓．从缺陷化学角度探讨了ＳｒＴｉＯ３系材料的氧敏性能     

线性高频电容器瓷料的研究

研制一种以ＳｒＴｉＯ３－Ｂｉ２Ｏ３·ｎＴｉＯ２－ＣａＴｉＯ３为主晶相的Ｖ组线性电容器瓷料．以三、五族氧化物为改性剂，使容量温度特性线性化；加ＰｂＴｉＯ３，使介电常数提高．其介电常数ε＞３１０，电容温度系数αｃ＝（－１５００±２５０）×１０－６／℃，其余各项电气、物理、机械性能均符合国际ＧＢ５５９６－８５．     

添加物对PLZT陶瓷的降温和改性作用

本文研究了４Ｂｉ２Ｏ３·Ｂ２Ｏ３助熔剂对ＰＬＺＴ瓷料的降温效果以及ＢａＳｎＯ３的固溶和Ｂａ２＋的Ａ位取代对掺Ａｇ＋的ＰＬＺＴ反铁电组分的改性作用，获得了中温烧结的ＰＬＺＴ系Ｘ７Ｒ瓷料．其主要性能指标达到：ε２９８Ｋ＝２０００±１００；ｔｇδ＜５０×１０－４；ρｖ＞１０１３Ω·ｃｍ；△ε／ε２９８Ｋ＜±１０％；Ｅｂ＞１．１×１０４ｋＶ／ｍ；Ｔｓ＝１３４３～１３９３·Ｋ     

复合氧化物SrTiOa-TiO2氧敏材料的研究￣①

将具有氧敏特性的ＳｒＴｉＯ３与ＴｉＯ２复合化，采用电子束蒸发方法，制备了ＳｒＴｉＯｚ－ＴｉＯ２薄膜，研究了其氧敏特性。实验结果表明，复合氧化物ＳｒＴｉＯ３－ＴｉＯ２薄膜的ｎ－ｐ型转换点比ＳｒＴｉＯ３薄膜的ｎ－ｐ型转换点高，氧敏特性有所改善，从而提高了贫燃区氧灵敏度曲线的线性化。     

Bi_2O_3气相热扩散及其工艺条件对SrTiO_3基多功能陶瓷性能的影响

研究了Ｂｉ２Ｏ３气相扩散及其热扩散工艺条件对半导化ＳｒＴｉＯ３基陶瓷的介电性能（ε）、介电损耗（Ｄ）、非线性系数（α）及电阻率（ρ）的影响,用ＳＥＭ和ＥＰＡ对微观结构进行了观察和分析,结果显示Ｂｉ２Ｏ３主要集中在晶界附近．用ＳｒＴｉＯ３气相扩散法成功地获得了εａｐｐ＞５００００,Ｄ＜０．０１,α＞６．０,ρ＞５×１０１０Ω·ｃｍ的ＳｒＴｉＯ３基多功能陶瓷．     

两种系列极性玻璃陶瓷的低温介电和热释电性

在１０Ｋ～３００Ｋ温度范围内研究了Ｂａ２ＴｉＳｉ２Ｏ８和Ｓｒ２ＴｉＳｉ２Ｏ８极性玻璃陶瓷的个电和热释电性．Ｂａ２ＴｉＳｉ２Ｏ８玻璃瓷的室温热释电系数达到－７．０×１０－６Ｃ／ｍ２、Ｋ，具有良好的低温热释电性．含ＳｒＴｉＯ８结晶的Ｓｒ２ＴｉＳｉ２Ｏ８极性玻璃陶瓷的室温热释电系数仅为－１．８×１０－７Ｃ／ｍ２·Ｋ，而且其绝对值在１００Ｋ以下较快地变小，并在４０Ｋ以下出现正值，它可能是由于ＳｒＴｉＯ８结晶发生结构相交的结果．     

KNbO3陶瓷的半导化及PTC效应

采用添加钾锗玻璃和掺ＭｏＯ３的方法，制备了ＫＮｂＯ３半导瓷，在此基础上，对ＫＮｂＯ３半导瓷样品进行了电学性能的测试以及样品断面形貌的扫描电镜观察和分析。结果表明，两种方法制备的ＫＮｂＯ３半导瓷样品都在铌酸钾晶体的两个相变点附近出现了ＰＴＣ电阻异常：一个在正交铁电相－－四方铁电相转变处；另一个在四方铁电相－－立方顺电相转变处，而掺ＭｏＯ３制备的半导瓷具有较小这曙电阻率及较大的电阻率反常幅度（ＦＥ－Ｆ     

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。     

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.