Zn2SiO4：Mn纳米微晶薄膜的溶胶—凝胶法制备及其光致…

以硝酸锌，硝酸锰，正硅酸乙酯，无水乙醇为主要原料，用溶胶－凝胶提拉法制备了Ｚｎ２ＳｉＯ４：Ｍｎ薄膜，并利用ＸＲＤ，ＳＥＭ，荧光分光光度计和多频荧光寿命仪等对薄膜进行了分析。结果表明，采用上述先驱动通过溶胶－凝胶过程可获得的均匀致密的薄膜。     

Ca_8Zn（SiO_4）_4Cl_2：Eu~（2＋），Mn~（2＋）荧光体中Mn~（2＋）的晶晶学格位及Eu~（2＋）－Mn~（2＋）间能量传递

合成了Ｃａ８Ｚｎ（ＳｉＯ４）４Ｃｌ２：Ｅｕ（２＋），Ｍｎ（２＋）荧光体，对荧光体进行了结构和光谱的测试与分析．结果表明，Ｍｎ（２＋）优先占据四面体配位的Ｚｎ格位，Ｅｕ（２＋）－Ｍｎ（２＋）之间存在着有效的能量传递．     

贵金属催化剂对锡酸锌气敏特性的影响￣①

采用均匀沉淀法合成了超微粒锡酸锌（Ｚｎ２ＳｎＯ４）气敏材料，利用浸渍法对Ｚｎ２ＳｎＯ４材料进行了掺杂，用ＸＲＤ和ＴＥＭ对其微结构进行了研究，实验结果表明，合成材料为均匀颗粒状，粒径小于０．１μｍ，该材料对可燃气体具有高的灵敏度，通过某些贵金属掺杂可提高Ｚｎ２ＳｎＯ４对Ｃ２Ｈ５ＯＨ气体的选择性，ＳｉＯ２的掺杂可大幅度提高Ｚｎ２ＳｎＯ４对氢气的灵敏度，Ｚｎ２ＳｎＯ４材料有可能在可燃气体、选择性酒敏元件上取得应用。     

贵金属催化剂对锡酸锌气敏特性的影响

采用均匀沉淀法合成了超微粒锡酸锌气敏材料，利用浸渍法对Ｚｎ２ＳｎＯ４材料进行了掺杂，用ＸＲＤ和ＴＥＭ对其微结构进行了研究，实验结果表明，合成了材料为均匀颗粒状，粒径小于０．１μ该材料对可燃气体具有高的灵敏度，通过某些贵金属掺杂可提高Ｚｎ２ＳｎＯ４对Ｃ２Ｈ５ＯＨ气体的选择性，ＳｉＯ２的掺杂可大幅度提高Ｚｎ２ＳｎＯ４对氢气的灵敏度。     

SnO2.ZnO纳米微粒／硬脂酸交替L—B膜的制备及结构

采用胶体化学方法制备了ＳｎＯ２．ＺｎＯ微粒的水溶胶和有机溶胶，实验结果表明，ＳｎＯ２．ＺｎＯ胶体存在着明显的量子尺寸效应。应用Ｌ－Ｂ膜技术制备了ＳＮｏ２．ｚＮｏ纳为微粒／硬脂酸交替Ｌ－Ｂ膜，用原子国显微镜观察了ＳｎＯ２．ＺｎＯ纳米微粒／硬脂酸交替Ｌ－Ｂ膜的形貌。     

用Sol-Gel法制备气敏传感器SnO2薄膜的研究

采用无机试剂（ＳｎＣｌ４．５Ｈ２Ｏ）为原料,用溶胶－凝胶（Ｓｏｌ－Ｇｅｌ）法制备研制气敏传感的ＳｎＯ２薄膜,研究了ＳｎＯ２薄膜的电阻随掺杂和温度的变化关系,并且用ＸＲＤ对ＳｎＯ２薄膜进行分析,结果表明,掺杂和热处理温度对薄膜晶粒尺寸的大小、薄膜的结构形态均有较大的影响,进而影响薄膜的电导及传感器的灵敏度。     

Sn－SnO_x薄膜的湿敏特性研究

研究了利用ＶＥＴＯ技术获得的一种新的Ｓｎ－ＳｎＯｘ电阻式薄膜湿度传感器；湿敏薄膜包含β－Ｓｎ、ＳｎＯ和ＳｎＯ２态，ＳＥＭ观察表明，孔尺寸在０．１～０．５μｍ之间的表面结构对应着高性能的湿度传感器，环境湿度从１１％～９７％ＲＨ的变化过程中，传感器阻抗变化约三个量级，传感器具有小子３０ｓ的恢复时间。     

SnO_2·ZnO纳米微粒／硬脂酸交替L－B膜的制备及结构

采用胶体化学方法制备了ＳｎＯ_２．ＺｎＯ微粒的水溶胶和有机溶胶，实验结果表明，ＳｎＯ_２·ＺｎＯ胶体存在着明显的量子尺寸效应。应用Ｌ－Ｂ膜技术制备了ＳｎＯ_２·Ｚｎｏ纳米微粒／硬脂酸交替Ｌ－Ｂ膜，用原子力显微镜观察了ＳｎＯ_２·ＺｎＯ纳米微粒／硬脂酸交替Ｌ－Ｂ膜的形貌。通过加热除去硬脂酸后的ＳｎＯ_２·ＺｎＯ膜有好的气敏性及对酒精的选择性。     

Study of technology on MnSO_4 preparation from highferrous manganese spar

Ｍａｎｇａｎｅｓｅｄｉｏｘｉｄｅｆｏｒｄｒｙｂａｔｔｅｒｙｕｓｅｉｓｍａｉｎｌｙｐｒｅｐａｒｅｄｂｙｅｌｅｃｔｒｏｌｙｚｉｎｇｍａｎｇａｎｅｓｅｓｕｌｆａｔｅ．ＥｌｅｃｔｒｏｌｙｔｉｃＭｎＯ２ｉｓｐｒｅｐａｒｅｄｆｒｏｍＭｎＳＯ４ｉｎｓｕｌｆｕｒｉｃａｃｉｄｓｏｌｕｔｉｏｎ，ｉｎｗｈｉｃｈｅｌｅｃｔｒｏｃｈｅｍｉｃａｌｐｒｉｎｃｉｐｌｅｉｓｕｔｉｌｉｚｅｄ．ＭｎＳＯ４ｉｓｍａｄｅｔｈｒｏｕｇｈｔｈａｔｍａｎｇａｎｅｓｅｓｐａｒｉｓｉｍｍｅｒｓｅｄｉｎｓｕｌｆｕｒｉｃａｃｉｄ．Ｉｎｔｈｅｐａｓ…     

水稻幼苗超氧物歧化酶同工酶的研究

应用聚丙烯酰胺凝胶垂直平板电泳对水稻幼苗ＳＯＤ同工酶进行了研究。结果表明，４个品种的水稻幼苗的均含有６种ＳＯＤ同工酶，其中５种为Ｃｕ．Ｚｎ－ＳＯＤ，一种为Ｍｎ－ＳＯＤ，未发现Ｆｅ－ＳＯＤ．Ｃｕ．Ｚｎ－ＳＯＤ活性占ＳＯＤ总活性的９０％左右，Ｍｎ－ＳＯＤ占１０％左右，品种间同酶类型，酶活性无明显差异。     

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.     

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.     

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.     

A computer generator for randomly layered structures

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

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.     

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.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-