硫酸介质中铅阳极膜阴极还原过程的研究

采用光电化学技术和实时交流阻抗测量等现场方法研究铅阳极膜的阴极还原过程，发现ＰｂＯ电位区阳极氧化形成的阳极膜在阴极还原时有两种ＰｂＯ的还原，即ｏ－ＰｂＯ和ｔ－ＰｂＯ二种氧化物的还原，还原过程中的电极阻抗变化情况表明ＰｂＯ层是均匀还原的，且是ｔ－ＰｂＯ先还原，ｏ－ＰｂＯ后还原．还分析了铅阳极膜在阴极还原过程中所表现出来的阴极光响应．     

阳极PbO2膜电催化性能的研究

过实验探讨了铅（Ｐｂ）在阳极极化过程中形成的阳极ＰｂＯ＿２膜的电催化性能，结果表明：在硫酸溶液中的恒电位极化得到铅的阳极Ｐｂ０＿２膜，比未形成阳极膜的铅电极（Ｐｂ）对于Ｍｎ￣（２＋）氧化成的反应具有电催化性能，能使反应速率加快。     

添加剂对粘结镍电极性能的影响

用球形Ｎｉ（ＯＨ）２做为镍电极的活性物质,讨论了电极中加入各种添加剂（如Ｃｏ、Ｚｎ、Ｂａ和Ｃｓ等）对涂膏式镍电极活性物质Ｎｉ（ＯＨ）２利用率、快速放电能力、放电电位、电极膨胀率和氧析出电位等性能的影响。电极中添加ＣｏＣ,Ｎｉ（ＯＨ）２利用率大大增加,电极快速放电能力增强,电极反应加逆性变好。电极中添加ＣｏＯ和一定量的ＺｎＯ或Ｂａ（ＯＨ）２能够抑制过充电时γ－ＮｉＯＯＨ的生成,降低电极膨胀率。     

Pb／PbO／PbSO4电极在硫酸溶液中的还原

采用阴极线性电位扫描法、实时交流阻抗测量及光电子能谱等研究Ｐｂ／ＰｂＯ／ＰｂＳＯ４电极在硫酸溶液中的阴极还原过程．结果表明，ＰｂＯ还原峰的峰电位随氧化时间的增加而负移，ＰｂＯ在还原时分为两个阶段即ｏ－ＰｂＯ和ｔ－ＰｂＯ的还原，ＰｂＯ还原发生在ＰｂＯ与基底Ｐｂ的界面．     

含铅的多元氢阴极电催化性能的研究

用电沉积法制备Ｍｏ－Ｗ－Ｎｉ－Ｐｂ－Ｃａ多元活性阴极，研究了在０．５ｍｏｌ／Ｌ Ｈ２ＳＯ４中的析氢反应，结果表明，多元阴极具有较高的电催化活性，其析氢过电位比软钢阴极降低３０５ｍＶ，ｉ０提高三个数量级，且有较好的稳定性，并用光电子能谱研究了表面组成和结构。证实表面有：Ｎｉ，ＮｉＯ，ＭｏＯ２，ＭｏＯ＾２－４，ＷＯ３，ＰｂＯ２，ＰｂＯ，Ｃａ＾＋＋等物质。     

次亚磷酸根在Pt电极上的电氧化研究

用循环伏安法研究Ｈ２ＰＯ２＾－在铂电极上的电氧化行为,并讨论了电氧化的机理。结果表明,在０．５ｍｏｌ／ＬＨ２ＳＯ４介质中,Ｈ２ＰＯ＾－２抑制氢和氧在Ｐｔ电极上的吸附,并通过两种径在０．４－１．２Ｖ的电位范围发生氧化：Ｈ２ＰＯ＾－２直接氧化形成Ｈ２ＰＯ３＾－３和Ｈ２ＰＯ＾２通过前置化学步骤形成吸附中间物Ｈ３ＰＯ３然后进一步电氧化形成Ｈ３ＰＯ４。所述机理可以较好地解释电位扫描速度、介质温度及次亚磷酸根     

砷钼杂多阴离子薄膜修饰电极的电化学特性及？…

用电化学沉积法制备了Ａｓ－Ｍｏ杂多阴离子修电极，在０．３ｍｏｌ／Ｌ Ｈ２ＳＯ４溶液中及０．７０Ｖ～０．００Ｖ电位范围内，该电极具有三对可逆氧化还原表面波，它们分别对应于Ａｓ－Ｍｏ杂多阴离子中Ｍｏ的三个２电子氧化还原过程，这三对表面波分别对ＮＯ２＾－ＩＯ３＾－及ＡｓＭｏ１２Ｏ＾３４０离子具有电催化活性，文中给出了其催化机理及浓度响应范围。     

电极类型对NiOOH循环伏安测试的影响

 制备了NiOOH的涂膏式电极和粉末微电极,并对两种电极进行了循环伏安测试.测试结果表明,粉末微电极出现了还原峰和氧化峰,而涂膏式电极只出现了还原峰,表明粉末微电极的电极可逆性优于涂膏式电极;对于粉末微电极,其氧化峰及还原峰的峰电位、峰电流最终均趋于稳定,说明所制备NiOOH较为稳定;而其ΔE值最小仅为0.131 V,小于涂膏式电极所测值,说明粉末微电极用于循环伏安测试效果更好,所制备NiOOH样品晶格结构较为稳定,具有较好的电极可逆性.对造成涂膏式电极和粉末微电极测试结果差异的原因进行了分析探讨.     

Pb－Pb＿3（PO4）＿2化学修饰电极响应机理的探讨

初步探讨了Ｐｂ－Ｐｂ３（ＰＯ４）２化学修饰电极的响应机理，提出了该修饰电极在溶液中的界面模型，说明了该修饰电极电位的产生     

β—PbO2修饰电极的研究（Ⅱ）

进行了β－ＰｂＯ２／ＳｎＯ２／Ｔｉ电极的研制及其性能的研究，与以前做的β－ＰｂＯ２／Ｔｉ进行比较，显示了β－ＰｂＯ２／ＳｎＯ２／Ｔｉ修饰电极导电性能好并节省电能等方面的优越性。     

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.     

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.     

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.     

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.