高分子量PAN溶液流变性质的研究

用高分子量PAN聚合体进行纺丝是提高PAN基碳纤维原丝强度的一条主要途径，但高分子量PAN聚合体的溶解往往不完全，可纺性差，本采用实验室自制设备对高分子量PAN聚合体进行了溶解，通过对所得溶液流变性质的研究发现该溶液可纺性良好。     

微乳液介质-1-(2-吡啶偶氮)-2-萘酚光度法测定水中微量铜

以C6H6／H2O／TritonX-100/C2H5OH构成的非离子型微乳液为介质，进行了PAN-Cu(Ⅱ)分光光度研究。选择554nm为测定波长，测得表观摩尔吸光系数。为3．97×104L·mol-1cm-1．本法将PAN溶解在微乳液中，可直接测定水中铜（Ⅱ），省去原萃取光度法中的萃取过程，操作简单，配合使用酒石酸钾钠可准确测定锻铝中的微量铜。     

PAN纤维径向结构及其表征方法的研究

以湿法纺丝制备的聚丙烯腈（PAN）纤维为研究对象,将纤维在二甲基亚砜（DMSO）水溶液中进行溶解,通过其溶解特征探讨了纤维的溶解机理,进而对纤维的径向结构进行分析表征,并结合红外测试分析了其径向结构对预氧化进程的影响。结果表明：PAN纤维的溶解机理为自内向外进行;通过纤维的溶解特征可分析出纤维径向结构,且与红外测试所得结论相同;凝固浴温度在45℃时与25℃相比,所得纤维径向上皮层及芯层更致密,过渡区域更疏松;预氧化进程初期,氧气更易在致密程度更低更疏松的纤维径向上发生扩散。     

PVC共混膜制备及其在造纸黑液处理中的应用

以聚氯乙烯（PVC）为膜材料，二甲基乙酰胺（DMAc）为溶剂，聚丙烯腈（PAN）为高分子添加物，研制出PVC／PAN共混膜，讨论了PVC、PAN的共混比例对共混膜性能的影响。同时，考察了PVC／PAN共混膜在处理造纸废水中的应用。实验结果表明：PVC／PAN共混膜的水通量和截留率可达到537．6（L／m^2·h）和85．4％，并随PAN共混比例的增加，膜的水通量增加，截留率减小。通过电镜观察，共混膜具有不对称结构。当PAN含量为4％时，共混膜处理造纸黑液的效率较高，出水稳定，黑液的COD、色度去除率分别可达83．2％和90．8％，黑液的浊度和ss等指标也大幅降低。     

PAN／Cu／Ni纤维及复合材料的电磁屏蔽性能

用聚丙烯腈纤维经化学镀铜再电镀镍制成的导电ＰＡＮ／Ｃｕ／Ｎｉ纤维作填料，与ＨＩＰＳ树脂熔融共混，制备了导电复合材料．对纤维表面镀层的形态结构、导电性及复合材料的导电性和电磁屏蔽性（包括导电填料量、混炼时间及纤维表面处理等）进行了深入地研究．同时对复合材料电磁屏蔽的理论值与实验值做了比较．     

用薄层扫描仪-双溶剂溶解提取法鉴别蓝黑钢笔墨水字迹的相对书写时间

应用薄层扫描仪-双溶剂溶解提取法鉴别蓝黑钢笔墨水字迹的书写时间，为解决文件检验中鉴定蓝黑钢笔墨水字迹的书写时间这个难题提供了弱-强双溶剂的选定、取样方法、溶解方法、溶解时间、点样方法以及薄层扫描的条件，可以量化地确定蓝黑钢笔墨水的相对书写时间。实验随机选用了8种蓝黑墨水样品进行相对书写时间的鉴定，得到了良好的鉴别结果。     

Fe_3O_4与Cr_2O_3在过氧化氢─柠檬酸中的溶解特性研究

研究了粒径为０．０４８～０．０５０ｍｍＦｅ３Ｏ４与Ｃｒ２Ｏ３在过氧化氢－柠檬酸水溶液中的溶解特性．单一组分的Ｈ２Ｏ２和柠檬酸分别对Ｃｒ２Ｏ３和Ｆｅ３Ｏ４有较高的溶解量，而混合体系则大大降低了Ｃｒ２Ｏ３和Ｆｅ３Ｏ４的溶解量；Ｆｅ３Ｏ４在混合体系中的溶解量随ｐＨ的升高而降低，随温度的升高而升高，在用振荡溶液保持固体颗粒悬浮状态的情况下，在６０分钟内能达到络合溶解平衡；Ｃｒ２Ｏ３在混合体系中的溶解量，在改变ｐＨ、温度和振荡时间的情况下均变化不大．     

PEW在溶剂中的溶解行为及脱色研究

本文对PEW(PEW)在溶剂中的溶解度和溶解时间进行了测定,研究了PEW分子量、溶解温度对溶解度和溶解时间的影响。采用溶解方法对灰色PEW进行了脱色试验,通过白度、原子吸收分光光度分析证明,PEW中的有色杂质被有效去除,并初步认定有色杂质可能来自于聚合体系中的引发剂。     

二氧化氮测定中显色液的制备

测定环境空气中的二氧化氮时，显色液的制备过程中，对氨基苯磺酸在常温下溶解很缓慢，室温低时，一两天也溶解不完全。二氧化氮的分光光度法（GB／T15435－1995）规定用热水溶解对氨基苯磺酸。笔者在实践过程中，发现把其溶于沸水，通过对标准样和大气监测点的测定，也能达到实验的要求。这样，更能提高其溶解速度，节约时间。     

纤维素稳定性及再生纤维素材料性能研究

离子液体以其良好的物理化学性能越来越引起人们的重视与关注．研究了纤维素溶液的降解问题，发现此溶液在常温下放置60d，其中的纤维素基本不发生降解；且溶解温度越高、时间越长的情况下，溶液中纤维素的降解也越剧烈．     

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.