萃取石墨炉原子吸收光谱法测定石油中As

研究了石墨炉原子吸收光谱法测定石油中Ａｓ的适宜条件。以ＭＩＢＫ为稀释剂，用Ｉ_２－甲苯－ＨＮＯ_３萃取，以Ｐｄ为基体改进剂，成功地测定了石油中的Ａｓ。方法检出限为７．５μｇ·Ｌ~（－１）（Ｋ＝３），相对标准偏差（Ｓ_ｒ）及回收率（Ｒ）分别为２．８％和９８％～１０２％，Ａｓ的线性范围是１３～２５０μｇ·Ｌ~（－１）。     

石墨炉原子吸收测定生物样品中痕量铬的基体比较研究

对石墨炉原子吸收分光光度法测定生物样品中痕量铬的基体改进剂进行了比较研究,选定了Ｍｇ（ＮＯ３）２为基体改进剂,拟定了不需校正背景、不用分离直接石墨炉原子吸收法测定痕量铬的分析方法．结果表明,方法的线性范围为０～２００ｎｇ／ｍＬＣｒ,其特征量为３．５×１０－１２ｇ／１％．方法已用于人血清、人尿和人发中痕量铬的测定．     

石墨炉原子吸收法测定水中的痕量钴

考察了石墨炉原子吸收法（ＧＦＡＡＳ）中不同基体改进剂对钴的灰化、原子化温度的影响,采用钯－锶为基体改进剂测定了自来水、井水及河水中的痕量钴,方法的灵敏度和检出限分别为０１５ｐｇ和０２１ｐｇ,回收率为９７８％～１０１３％。     

石墨炉原子吸收光谱法测京万红中的镉

本文研究了利用石墨炉原子吸收光谱法测定京万红中镉，以ＨＮＯ３－ＨＣｌＯ４－Ｈ２Ｏ２处理样品，转化为测定溶液，残留的ＨＮＯ３、ＨＣｌＯ４对测定无影响，可检测０．００２４μｇ／ｇ的镉；精密度２．４％；回收率在９５－１１０％。     

石墨炉原子吸收测定生物样品中痕量钴的基体改进剂的比较

在比较钴的基体改进剂的基础上，选定了ＮＨ４ＶＯ３为基体改进剂，拟定了用石墨炉原子吸收法测定人发中痕量钴的分析方法．结果表明，方法的线性范围为０～３２０ｎｇ／ｍＬＣｏ２＋，其特征量为１．３×１０－３μｇ／（ｍＬ·１％）．方法已用于标准人发和植物标样中痕量钴的测定     

石墨炉原子吸收光谱法测京万红中的镉

本文研究了利用石墨炉原子吸收光谱法测定京万红中镉．以ＨＮＯ３－ＨＣｌＯ４－Ｈ２Ｏ２处理样品，转化为测定溶液。残留的ＨＮＯ３、ＨＣｌＯ４对测定无影响。可检测０．００２４μｇ／ｇ的镉；精密度达２．４％；回收率在９５－１１０％．     

石墨炉原子吸收测定血清中痕量硒及其基体改进剂的比较研究

在比较硒的基体改进剂的基础上，选定了Ｃｕ（ＮＯ３）２和Ｎｉ（ＮＯ３）２同时存在为基体改进剂，拟定了用石墨炉原子吸收法测定牛血清和人血清中的痕量硒的分析方法．其线性范围为０．０２０～０．１６０μｇ／ｍＬＳｅ，特征量为３．１６×１０－１２ｇ／１％，检出限为４．１８ｎｇ／ｍＬ．方法用于标准牛血清测定，结果与其标准值基本吻合，其相对误差为１．３６％；人血清测定其标准加入回收率为８７％～１０５％．     

石墨炉原子吸收光谱测定微量钴

研究了石墨炉原子吸收测定微量钴，钴吸收线的特性，各种酸对钴原子化的影响以及Ｍｇ（ＮＯ３）２的基体改进效应，提出了以Ｎａ２ＳｉＯ３为稳定剂，用石墨炉原子吸收人发中痕量钴的方法。     

GFAAS直接法测定钨产品中杂质元素

用石墨炉原子吸收法直接测定钨产品中Ａｌ等１２个杂质元素．考察了试样在各种溶解介质的溶解速度、效果、背景值、空白值及对各分析元素信号的影响,发现柠檬酸铵－氨水体系对各元素（除Ａｌ外）均适用,而Ａｌ最宜用酒石酸－氨水作溶解剂．研究了钨基体对各元素信号的影响及用钨涂层热解管消除干扰的方法,可用纯标准系列作校准曲线,方法检出限（μｇ／Ｌ,以３σ计）Ａｌ为１．４３,Ａｓ为０．６５,Ｂｉ为３．６９,Ｃｄ为０．０６,Ｃｏ为０．３２,Ｃｒ为０．４０,Ｃｕ为０．６４,Ｍｎ为０．１０,Ｎｉ为０．３８,Ｐｂ为０．３８,Ｓｂ为０．４３和Ｓｎ为１．０３．通过ＷＯ３标准样（ＢＹＧ１２０１－１～３）的验证,其分析结果与推荐值吻合,相对标准偏差为１．２％～５．６％,实际样品的回收率在８９％～１１０％之间．     

原子吸收光谱法中石墨炉原子化效率的测量

提出了一种以测量峰高和峰面积吸光度及原子停留时间为基础的测定原子吸收光谱分析中石墨炉原子化效率的方法，测定了日立ＧＡ－３石墨炉内Ａｇ，Ｃｄ，Ｃｒ，Ｇａ，Ｇｅ和Ｉｎ等元素的原子化效率β和ε＿α值。结果表明，在所研究的温度范围内Ａｇ和Ｃｄ的β和ε＿α值基本上是稳定的，而其余四个元素的β和ε＿α值于较高温度区达到稳定值。     

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.