Ba0.65Sr0.35TiO3薄膜的磁控溅射法制备与介电性能研究

用磁控溅射法在Pt/Ti/SiO2/Si衬底上沉积Ba0.65Sr0.35TiO3薄膜.研究沉积气压和衬底温度对BST薄膜结构及介电性能的影响.应用XRD和AFM表征薄膜的物相结构及其表面形貌,通过阻抗分析仪测量薄膜的介电性能.结果表明在3.0 Pa沉积气压和600℃衬底温度下制备的Ba0.65Sr0.35TiO3薄膜有较好的微结构和介电性能.     

衬底温度对共溅射法制备BaSi_2薄膜的影响

研究衬底温度对采用Ba靶和Si靶共溅射制备BaSi_2薄膜的影响.采用X射线衍射仪和扫描电子显微镜对在不同衬底温度条件下制备的薄膜的微观结构组分和表面形貌进行表征与分析.结果表明,衬底温度在500℃以下时Ba和Si共沉积在Si(111)衬底上生成的为非晶,结合后续的真空退火生成BaSi_2多晶薄膜.衬底温度是制备优质BaSi_2薄膜的关键因素,衬底温度高于600℃时,共溅射法能够直接生成BaSi_2薄膜.     

C轴择优取向AlN薄膜的制备研究

采用直流磁控反应溅射法制备AlN薄膜.研究了靶基距、衬底温度和电极材料对AlN薄膜择优取向的影响.用XRD、AFM表征了AlN薄膜的结构、表面形貌.结果表明衬底温度为300℃、靶基距为3cm,在Pt电极上可沉积高质量的C轴择优取向AlN薄膜.     

衬底温度对氮化锌薄膜特性的影响

采用直流磁控溅射的方法,在不同温度的玻璃衬底上生长Zn3N2薄膜.研究了衬底温度对样品的微结构、表面形貌以及光学性质的影响.结果表明,随着衬底温度的升高,生长的Zn3N2薄膜择优取向增多;晶粒尺寸逐渐变大;Zn3N2薄膜间接光学带隙由1.86 eV逐渐增大到2.26 eV.     

V型沟槽Si衬底上SrTiO_3薄膜制备

在单晶Si(100)衬底以及经过改型处理的侧壁为Si(110)"V"型沟槽衬底上,分别采用液相沉积(LPD)和射频磁控溅射法(RF magnetron sputtering)制备了SrTiO3(STO)薄膜.通过对沉积溶液的温度、衬底的表面处理方法、衬底的放置方式以及热处理工艺的优化,研究了利用LPD法制备具有较为致密均匀的STO薄膜的条件;通过对溅射功率、溅射气压、衬底温度以及退火温度等具体参数的优化,研究了利用射频磁控溅射法在较低的衬底温度下制备具有一定取向的STO薄膜的条件.结果表明,射频磁控溅射法制备的STO薄膜在结晶状态、择优取向和表面形貌优于液相沉积.     

磁控溅射制备TiO_2薄膜及其光学特性研究

采用直流反应磁控溅射法在玻璃衬底上制备TiO2薄膜.用紫外-可见光分光光度计和AFM分别表征了薄膜的透射率和表面形貌,用包络线法详细研究了不同衬底温度下TiO2薄膜的光学特性.结果表明:薄膜在可见光波段有很高的透明度,且随着衬底温度的升高,薄膜的透射率略有增加,薄膜的折射率和吸收系数增大,薄膜的光学带隙减小;同时,薄膜表面粗糙度减小,薄膜变得平整.     

生长条件对柔性钴铁氧体薄膜结构和磁性能的影响

采用脉冲激光沉积法在柔性云母衬底上生长了钴铁氧体(CoFe_2O_4,CFO)薄膜材料.利用X射线衍射、原子力显微镜和超导量子干涉仪对薄膜样品的结构、形貌和磁性进行了研究,讨论了在不同衬底温度和氧气压力下制备的CFO薄膜的结构与磁性能差异.结果表明,在590～690 ℃温度区间与10～40 mT氧压区间内,650 ℃、30 mT条件下生长的CFO薄膜表面光滑平整,晶粒紧密排列,具有良好的铁磁性.     

超声喷雾热解法制备SnS薄膜及其性质研究

采用超声喷雾热解法制备了SnS薄膜,用XRD和SEM等测试手段对薄膜样品的晶体结构和表面形貌进行了表征, 并测试了SnS薄膜时光学性能.制备中对比了几种反应前驱液配方和改变沉积温度对SnS薄膜结构、形貌及透过率的影响,得到了如下结果：以N,N二乙基硫脲+氯化亚锡+甲醇溶液作为前驱液,沉积温度为300℃时,可得到不含有SnO2的单一SnS薄膜.     

衬底温度对ZnO：Al薄膜结构和光透过性能的影响

利用超声喷雾热解方法以不同的沉积温度（450～530℃）在石英衬底上制备出具备较高光学质量的ZnO：Al（AZO）薄膜.通过X射线衍射谱（XRD）研究了薄膜的结构,用扫描电子显微镜（SEM）研究了薄膜的表面形貌,用紫外可见（UV）分光光度计对薄膜的光透过特性进行了测试分析.结果表明：所制备薄膜在可见波段具有较高透过率,并且沉积温度对AZO薄膜的结构和光透过性能有很大影响.在衬底温度为470℃时得到的AZO薄膜具有（002）择优取向,结晶质量最好、光透过率最高,在可见光区平均透过率达到85%以上.     

衬底温度对射频磁控溅射制备ZnO薄膜结构的影响

采用射频磁控溅射法在玻璃衬底上制备ZnO薄膜.用X射线衍射仪(XRD)、扫描电镜(SEM)对不同衬底温度下制备薄膜的相结构和表面形貌进行分析.结果表明,在衬底温度为400℃时制备的ZnO薄膜表面光滑,晶粒尺寸均匀,结构致密,且沿c轴择优生长.     

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.