液晶的表面预倾排列

研究液晶在各种聚酰亚胺表面上的排列及预倾角，定性分析液晶预倾角的成因．实验结果表明，摩擦强度是影响液晶预倾角的主要因素．对于无支链聚酞亚胺，预倾角随摩擦强度的增大而增大，最大可达３°以上；对于有支链聚酰亚胺，预倾角随摩擦强度的增大而减小，弱摩擦时可以得到较为稳定的大预倾角（６°以上）的液晶排列．聚合物表面微观的、与液晶分子长度相当的不对称三角形的结构是形成液晶预倾角的必要条件．     

用于高预倾角液晶显示器件新取向材料

研制一种新型的能够引起18°高预倾角的取向材料──聚酰亚胺（PI）YB29．探讨预倾角对固化温度、固化时间、摩擦强度的依赖关系；同时研究这种材料的红外吸收光谱、电子能谱及240°扭曲的液晶盒的电光特性．     

向列型液晶的界面效应强度

本文讨论了向列型液晶扭曲盒在外加磁场的作用下，基板的易取向轴与液晶指向矢的倾角与界面结合强度和磁场强度的关系。     

液晶分子在含氟聚酰亚胺表面排列工艺研究

系统地研究了含氟聚酰胺酸的固化温度和固含量、摩擦条件、液晶材料的性能以及含氟二胺与不含氟二胺的物质的量比ｘ等因素对含氟聚酰亚胺表面排列性能的影响。研究结果表明，采用低聚酰胺酸固含量、低摩擦强度、较高的固化温度和较高的含氟二胺物质的量比可以得到具有较大预倾角的表面取向材料。     

染料掺杂的向列相液晶智能调光器件的开关态特性

提出了一种染料掺杂的向列相液晶智能玻璃器件的制作过程,并研究了它的开关态特性.先在上下两基板（ITO）上涂覆聚酰亚胺取向层,将液晶平铺在下基板上,再用带有密封胶框的上基板沿同一摩擦取向方向与下基板压合,制得向列相液晶器件.未加电场时,液晶在取向层的作用下形成平行与基板的多畴排列状态;施加电场后,液晶逐渐在电场作用转向,由平行于基板的多畴排列状态转变为垂直于基板的单畴排列状态,可见光在液晶器件中由散射转为透射,由关态转为开态,从而实现其明暗的切换.染料浓度与驱动电压共同影响器件的透射率.器件开关态阈值电压随器件厚度的增大而增大,在染料液晶浓度5%,盒厚30m时,器件的阈值电压为5 V,饱和电压为15 V,此时智能玻璃的透射率最高,明暗切换特性越好.     

用液晶(Liquid crystals)膜实现微波可见性的图形显示

<正> 胆甾相液晶(cholesteric liquid crystals)中的分子分层排列。在每层中的分子排列取向一致。但在层与层之间排列方法向扭转了一定角度,因此多层分子链的排列方向逐层扭转,而呈螺旋结构。当分子的排列方向旋转360°,又回到原来取向时为一个周期。在一个周期中,分子链排列完全相同的两层中间的距离称为螺距。当液晶受热而温度升高时,     

东鞍山铁矿东部矿体节理特征与分析

东鞍山铁矿床东部矿体及上盘围岩中发育有两组节理。一组节理的产状为:走向40°～220°,倾向SE130°,倾角80°,节理间距为0.1～0.2 m,延长3～5 m。另一组节理产状为:走向140°～320°,倾向SW230°,倾角75°,节理间距0.2～0.4 m。延长4～7 m。矿体产状为:走向135°～315°,倾向NE45°,倾角50°～55°。由于这三组结构面对岩矿层的切割,当爆破后,常形成铁矿石的大块体。     

MNDO法研究二苯硫醚和二苯亚砜的构象

本文使用ＭＮＤＯ半经验量子化学方法对二苯硫醚和二苯亚砜的构象进行研究。结果表明，这两种化合物的最优构象呈扭曲状，两个苯环相对桥键面偏转角各为（６７°，６７°）和（７２°，７２°）。     

近晶A相液晶在聚酰亚胺LB膜上的排列

合成了聚酰胺酸,研究了它在气液界面上的成膜条件;制备了聚酰胺酸盐的LB膜,通过亚胺化制得了Y型聚酰亚胺LB膜;用红外光谱证实了亚胺化较为完全。用聚酰亚胺LB膜作为排列S_A相液晶的定向膜,制成了液晶盒。通过偏光显微镜证实了未经摩擦的聚酰亚胺LB膜可以排列成近晶相液晶分子。讨论了影响成膜及液晶分子在聚酰亚胺LB膜上排列的因素。     

江苏海州湾浮游动物的种类组成和分布──（Ⅱ）水母类（水螅水母和栉水母）

对１９９０～１９９１年在江苏海州湾水域（１１９°１０＇～１２０°１０＇Ｅ，３４°０＇～３５°１０＇Ｎ）采集的标本进行鉴定，共有１８种，隶属１２科１４属．其中水螅水母类１６种，栉水母类２种．其种类组成以暖温带近岸低盐种为主．在海州湾四个季度均有水母出现，分布范围较广，遍布本次调查海区各个站位，密集区位于１１９°２０＇～１１９°３０＇Ｅ，３４°４０＇～３５°００＇Ｎ之间的海域．分布面以５月和８月最广，密集度也高，尤以５月的个体生物最最高，８月次之，１１月和２月较少．     

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.