X射线荧光光谱法测定精炼渣成份

采用X射线荧光光谱仪测定精炼渣中TCa、SiO2、MgO、MnO、TiO2、P2O5、Al2O3的含量；研究精炼渣的制样条件及分析条件，测定其精密度及准确度，完全满足生产要求；并为冶炼特殊配制精炼渣的碱度，钢的脱氧、脱硫、脱钛、脱磷效果提供技术支持。     

固体吸附采样-FIA光度法测定大气中SO_2

提出一种固体吸附采样-流动注射（FIA）分光光度测定大气中SO2的方法，详细讨论FIA光度法测定及固体吸附对SO2实验条件的影响．     

海洋生物样品中硒的氢化物发生—原子荧炮分析9HG—AFS）

采用硼氢化钠还原法将试样中硒还原为按发性硒化氢，氩为载气将硒化氢吹出并导入火焰原子化器进行原子荧光测定，以正交设计法对该还原反应，氢化物转移，原子化及原子荧光测定条件等进行了详细研究，实验结果表明，在佳化条件下，该法检出限为0.072ug/dm^2，相对标准偏差为2．0％，标准曲线表明，在0.000-1.000ug/dm^3Se浓度范围内，有理想的线性关系，本法测定海洋生物样品硒的回收率为95．8％－102．4％。     

原子吸收分光光度法测定水中镉含量的分析质量控制

以原子吸收分光光度法对镉标准溶液中镉含量进行了二十次测定，对所得测定结果的精密度和准确度进行分析，并通过精密度控制图和百分回收率控制固有关参数对测定结果进行检验，全部测定值Xi均未超出平均值上控制限，但有2个测定值Xi低于下控制限，并由此引起2个极差值R超出极差值上控制限．讨论了原子吸收分光光度计的最佳工作条件、抗坏血酸用量选择及干扰离子和酸度的影响．对有机溶剂萃取法和直接测定法进行了比较，从而找出部分测定结果偏低的原因．     

煤显微组分荧光测试技术的研究

煤显微组分荧光性的试验研究表明，煤样的处理、保存、测量的方法不同以及测定条件的变化都对测试结果有明显的影响，通过试验数据，分析变化原因，提出了测定煤显微组分荧光泊样品处理、保存、测量方法及部分测定条件。     

pH电位法测定咪唑及其衍生物与Cu(Ⅱ)配位反应的各级稳定常数

文中利用pH电位法，在25℃，0.1mol/L KCl存在的条件下，通过测定咪唑、苯并咪唑、2-甲基苯并咪唑、2-乙基苯并咪唑和2- 丙基苯并咪唑与二价铜离子络合反应时溶液酸度值的变化，分别求算出了五种物质的加质子常数及配位反应的各级稳定常数。     

流动注射催化光度法同时测定铁和锰

基于铁(Ⅲ)和锰(Ⅱ)对高碘酸钾氧化罗丹明B褪色的催化作用及在不同反应条件下二者催化作用的差异，以反应条件作为化学计量学中的量测通道，应用岭回归法对铁(Ⅲ)和锰(Ⅱ)同时测定进行了研究，建立了流动注射催化光度法同时测定铁和锰的方法。在铁(Ⅲ)和锰(Ⅱ)浓度比为1：4——2：1的范围内，应用该法对其混合物进行测定，田收率分别为101．2％和101．1％。     

石墨炉原子吸收光谱法测定京万红药膏中锑的方法研究

利用石墨炉原子吸收光谱法测定京万红药膏中锑（Sb），确定了最佳测定条件，基体改进剂及样品处理方法等．在选定条件下以硝酸镍为基体改进剂，既可明显提高灰化温度，又对锑的吸收信号有显著增强作用．检出限可达1．7×10~(-4)μg／mL，精密度2．9％．用于实际样品测定时，平均回收率为94．4％．     

偏最小二乘法用于荧光光度法同时测定磷,硅的研究

将偏最小二乘法（ＰＬＳ）用于荧光光度法同时测定磷、硅，对荧光光度法测定条件及ＰＬＳ法最佳条件进行了试验和讨论。所建立的方法用于合金钢中磷、硅进行测定，获得了较满意的结果．     

低压离子色谱法测定三苯基膦中痕量氯离子

采用双柱低压离子色谱分离，电导检测了三苯基膦样品中的痕量氯离子，以Na2CO3作淋洗液，流动注射进样，优化色谱分离条件，并测定了该法的精密度，线性范围及回收率。     

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.     

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.     

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.     

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.     

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the