生物降解材料的研究进展

高分子材料在国民经济各部门已经得到普遍应用，但同时又带来严重的环境污染，文章主要介绍目前研究的几种可生物降解的高分子材料（包括淀粉基基降解材料、聚乳酸类降解材料、聚酸酐、可降解聚氨酯、PET／PEG可降解材料）的合成、性能等。     

高分子化学与物理

高分子化学与物理高分子化学与物理硕士点现有教授５名，副教授３名，设有４个长期稳定的研究方向：（１）高分子材料该研究方向以高分子物理学、量子化学、有机结构理论和高分子反应统计为基础，深入揭示高分子材料的结构与性能之间的关系；研究高分子材料的形态学、流变...     

新型聚乙烯胶粘剂的制备

聚乙烯（ＰＥ）为非极性材料，介电常数小于２．８，用乙烯—醋酸乙烯（ＥＶＡ）为主剂的热熔胶对粘接非极性高分子材料有较好的性能．本文主要研究了ＥＶＡ树脂的型号、各组分含量、加热温度等对ＥＶＡ热熔胶性能的影响及产品性能的检测     

新型聚乙烯胶粘剂的制备

聚乙烯（ＰＥ）为非极材料，介电常数小于２．８，用乙烯－－醋酸乙烯（ＥＶＡ）为主剂的热熔胶对粘接非极性高分子材料有较好的性能，本文主要研究了ＥＶＡ树脂的型号、各组分含量、加热等对ＥＶＡ热熔胶性能的影响及产品性能的检测。     

聚合物/纤维级氢氧化镁超细粉复合材料

高分子材料的阻燃研究经历了含卤阻燃、低卤阻燃到无卤阻燃的发展过程，特别是无机阻燃剂Al（OH）3、Mg（OH）2的研究与应用日益广泛。Mg（OH）2的分解温度为340℃,比Al（OH）3高100℃左右，更适用于高加工温度下的高分子材料阻燃。与普通Mg（OH）2相比,纤维级Mg（OH）2具有较大的长径比，更有利于提高材料的拉伸性能和；中击性能，一定程度上能起到玻璃短纤维的作用。为了理论推测，我们开展了此项课题研究。并得到如下结果：     

炭黑—聚丙烯复合型导电高分子材料的电热性能研究

文中研究了炭黑（ＣＢ）作为填充相，聚丙烯（ＰＰ）作为基体相的复合型导电高分子材料的电热性能。实验结果表明，ＣＢ－ＰＰ复合材料具有明显的渗流效应、正温度系数效应和低场下的线性伏安特性。利用这些特性，可改善或调节材料的导电、导热和机械性能，制备开关材料和面发热体材料等。     

智能及仿生材料技术专利态势分析

以压电陶瓷、形状记忆合金、自清洁与自修复高分子材料、电（磁）流变体、电（磁）致伸缩材料等为对象，分析了国际智能与仿生材料技术专利申请与研发情况，揭示了专利申请活动的时间、空间、机构、技术布局、重点专利技术追踪与演进等方面的特点，并对当前主要态势进行了总结分析。     

高分子物理概论

高分子概念的形成和高分子科学的出现始于20世纪20年代。当时有些有机化学家开展了缩聚反应及其自由基聚合反应的研究，并通过这些反应相继开发出尼龙（聚酰胺）66、氯丁橡胶、丁苯橡胶和聚甲基丙烯酸甲酯等一大批高分子材料，从而形成了“高分子化学”的研究领域。随着这些合成高分子的出现，解决这些高分子的性能和表征：以及了解其结构对性能的影响等问题也随之变得很必要了。因此从20世纪40年代至50年代，一批化学家、物理学家投入这方面的研究，渐渐形成了“高分子物理”这门新兴的学科。     

动粒生物磁分离分析技术

本产品是由直径0．5～4μm的纳米磁性高分子微球体材料（磁珠）。 应用以“大分子自组装”技术为核心的全套先进生产技术工艺,生产兼容现有磁珠分离分析系统的各种粒径尺寸、具有不同表面活性、满足生物磁分离分析技术商业应用的磁性高分子微球体材料（磁珠原料）,产品技术性能卓越,价格低廉,     

切片技术在聚合物材料研究中的应用

将切片技术与透射电子显微镜（TEM）、原子力显微镜（AFM）、光学显微镜（LM）等快速发展的显微分析技术结合起来，可以研究聚合物材料的形貌结构、相容性和结晶，以及填料的分散及形貌结构等，有助于优化聚合物材料的制备工艺条件、配方和性能。进一步优化切片速度、温度等切片技术参数并加强与显微红外光谱等其他显微学表征手段的结合，将使切片技术在高分子材料的结构分析与性能优化中发挥更加重要的作用。     

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-