电位分析法的通式及其使用

探讨了电位分析法计算公式的导出和使用中的一些问题,结合教学实践,指出为便于学生理解和记忆,应采用一个相互一致的公式来描述电动势、电极电位与离子浓度（或活度）的函数关系。以电动势计算待测离子浓度（或活度）时,所用公式应与指示电极的正负极性相对应。     

线性滴定法测定卤素混合离子

本文用线性滴定法测定卤素混合离子,实验采用等体积滴定,用滴定直线确定混合离子的各化学计量点.     

C-S-H中Al3+离子的固溶对表面吸附碱量的影响

研究了Al3+离子的固溶对C-S-H表面吸附Na+离子量的影响.实验结果表明,Al3+离子固溶于C-S-H结构中将使C-S-H表面所带的负电量增大,因而也就增大了C-S-H表面对Na+离子的吸附能力.     

IIIB—VIIB元素最高氧化态含氧酸或酸酐氧化性周期性探讨

对ＩＩＩＢ—ＶＩＩＢ元素最高氧化态含氧酸或酸酐中心离子的Ｚ＊／ｒ２进行了计算；分析了中心离子与氧之间化学键强度及其热力学状态，对其氧化性在同族中渐渐减弱规律进行了解释。     

pH电位滴定法测定油田水中有机酸

应用ｐＨ电位滴定法简便快速地测定了油田水中有机酸的总量,其加标回收率在９６％￣１０３％之间,ＲＳＤ小于２．８％,讨论了共存离子的干扰及干扰消除的方法,并与等速电泳法的测定结果对照,结果满意。     

C—S—H中Al^3＋离子的固溶对表面吸附碱量的影响

研究了Al^3＋离子的固溶对C—S—H表面吸附Na^＋离子量的影响。实验结果表明，Al^3＋离子固溶于C—S—H结构中将使C—S—H表面所带的负电量增大，因而也就增大了C—S—H表面对Na^＋离子的吸附能力。     

电位分析法中电位差计算方法的讨论

针对现有仪器分析教材中有关电位分析法中电池电动势计算方法的论述上的概念性模糊、公式间相互矛盾等展开了较深入的讨论，并做了相应的实验验证。指出电位分析法中真正要知道的是２支电极之间的电位差及其与被测离子活度之间的关系而非电池电动势，因此可采用公式Ｅ电位差＝Φ指示－Φ参比 计算各种情况下的电位差值。     

氟脲嘧啶PVC涂丝膜电极的研制及应用

制作了以氟脲嘧啶离子与汞离子的配位化合物 (配合比为 1 :1 )为电活性物质的氟脲嘧啶PVC涂丝膜电极 .用直接电位法测定氟脲嘧啶得到了良好的电极响应曲线 ,线性范围为 2个数量级 ,检测下限为 1 0 -3 mol/L ;在pH7.6～ 9.0的范围内H 对电极响应无干扰 ,十多种常见无机离子与一些嘧啶类离子对电极基本无干扰 .这一电极稳定性较好 ,寿命至少为 1 0 0天 .用其测定商业药品时 ,获得的结果与标准值基本相符 .     

C—S—H表面上吸附态Cl^-离子的分布特点

应用表面物理化学理论，分析了C—S—H在不同浓度、不同种类氯化物溶液中浸泡后ξ电位发生变化的原因，并在此基础上推测了被吸附的Cl^-离子在C—S—H表面上的分布状态。Cl^-离子似乎是C—S—H的特性吸附离子，只要C—S—H浸泡于氯化物溶液中，Cl^-离子将优先进入吸附层。吸附于C—X—H表面的Cl^-离子的总量包括吸附层中的Cl^-离子量和扩散层中的Cl^-离子量。随浸泡液中Cl^-离子浓度的增大，Cl^-离子不断进入吸附层，但吸附层的空间是有限的，吸附层中Cl^-离子增加的速度逐渐减慢。扩散层的Cl^-离子量取决于ξ电位的大小。在较高浓度的AlCl3溶液中浸泡的C-S—H对Cl^-离子的吸附量显著增大，由于此时双电层已显著变薄，因而不能忽略C—S—H表面长程范氏力对Cl^-离子的吸引作用。     

离子色谱分离-恒电位法联用检测菠菜中硝酸盐含量

本文采用离子色谱与恒电位法联用方法对菠菜中硝酸盐进行检测.采用硝酸为流动相,以IonPac AS11-HC阴离子交换柱分离后以恒电位仪为检测器进行安培检测,进样量为25 μL时NO3-离子的检出限(以3倍信噪比计)可降至0.2 μg/L,痕量NO3-离子标准溶液平行9次进样测定的相对标准偏差为2.5%,经过几百组测试,稳定性好、线性、重现性及灵敏度均令人满意.     

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.     

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.     

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.