基于甲苯与甲基环己烷可逆反应的贮氢技术

选用Ｎｉ／Ａｌ２Ｏ３和Ｐｔ－Ｓｎ－Ｋ／Ａｌ２Ｏ３作为催化剂,分别研究了甲苯在低温下的贮氢反应和甲基环己烷的释氢反应。结果表明,甲苯的低温贮氢容易实现,贮氢量主要收甲基环己烷的释氢量决定。     

Pt-Sn/CCA催化剂性能及结构表征

采用共浸法制备了ＰｔＳｎ／ＣＣＡ催化剂,利用在线色谱微反实验装置评价了此类催化剂对甲基环己烷脱氢反应的活性和抗炭性能,初步研究了ＰｔＳｎ／ＣＣＡ催化剂的物理化学结构。实验结果表明,ＰｔＳｎ／ＣＣＡ催化剂具有较好的低温（３００～３５０℃）脱氢活性和抗积炭稳定性。覆炭可改变γＡｌ２Ｏ３载体的孔结构参数,降低其表面酸性。覆炭载体的炭主要以单层或扁平多层块状结构沉积在载体表面上,并具有一定的石墨化程度。     

Cu—Mn—Pt／γ—Al2O3系列催化剂中组分间的活性增强效应

通过ＣＯ氧化活性测试，采用ＸＲＤ、ＸＰＳ、ＴＰＲ等方法表征，研究了Ｃｕ－Ｍｎ－Ｐｔ／γ－Ａｌ２Ｏ３系列催化剂中组分间的活性增强效应，并对其固相结构和表面组成进行表征．结果表明：（１）氧化型ＣｕＭｎ／γ－Ａｌ２Ｏ３催化剂中Ｃｕ和Ｍｎ之间存在一定的活性增强效应，两种活性组分发生协同作用；（２）还原型Ｐｔ－Ｃｕ／γ－Ａｌ２Ｏ３和Ｐｔ－Ｍｎ／γ－Ａｌ２Ｏ３催化剂的氧化活性在系列中最高，Ｐｔ－Ｍｎ／γ－Ａｌ２Ｏ３的ＣＯ氧化活性增强效应最为显著．这与加人Ｐｔ后，Ｃｕ２＋易被还原，Ｃｕ＋明显增多有关；（３）同时含有Ｃｕ、Ｍｎ组分的几种催化剂中，催化剂表面上Ｃｕ均有一定富集，加人Ｐｔ后，表相以Ｃｕ＋为主．由于Ｃｕ－Ｍｎ－Ｐｔ三元催化剂的制备方法不同，以致氧化活性相差很大，共浸制备较分浸制备的催化剂活性要好的多．     

Pt—Sn／CCA催化剂性能及结构表征

采用共浸法制备了Ｐｔ－Ｓｎ／ＣＣＡ催化剂，利用在线色谱－微反实验装置评价了此类催化剂对甲基环己烷脱氢反应的活性和抗炭性能，初步研究了Ｐｔ／Ｓｎ／ＣＣＡ催化剂的物理化学结构。     

Pd/Al_2O_3 催化合成2,3,5-三甲基氢醌的连续工艺

利用Ｐｄ／Ａｌ２Ｏ３催化剂,采用固定床的连续工艺将２,３,５－三甲基苯醌催化加氢得到高纯度的２,３,５－三甲基氢醌．考察了溶剂对加氢反应的影响,并通过实验确定了加氢工艺条件：２,３,５－三甲基苯醌的空速为０．２７ｇ（ｇｈ）－１,氢分压为０．１ＭＰａ,加氢反应温度为５０℃．同时将Ｐｄ／Ａｌ２Ｏ３与Ｐｔ／Ａｌ２Ｏ３的催化性能进行了比较,发现Ｐｄ／Ａｌ２Ｏ３催化剂在使用过程中选择性上升．     

一氧化碳氧化的钯催化剂研究Ⅰ．钯催化剂性能和反应条件对催化活性的影响

用浸渍法制备了不同担载量的Ｐｄ／Ａｌ＿２Ｏ＿３和Ｐｔ／Ａｌ＿２Ｏ＿３催化剂，在固定床微反中测定了它们催化ＣＯ氧化为ＣＯ＿２的活性。结果表明，催化剂金属含量低于７×１０￣（－５）时，Ｐｄ／Ａｌ＿２Ｏ＿３的活性优于Ｐｔ／Ａｌ＿２Ｏ＿３。催化剂经高温（８００℃）水蒸汽预处理活性下降。稀释用的载体和ＧＨＳＶ在７５０～１５００ｈ￣（－１）范围内对催化活性没有明显影响。     

制备条件对Pd／Al_2O_3催化棉籽油加氢活性的影响

使用ＳＥＭ，ＥＤＳ，ＥＰＭＡ，ＸＲＤ及ＸＰＳ对在不同温度下，于空气气氛中焙烧的负载型钯催化剂Ｐｄ／Ａｌ２Ｏ３进行了表征，结合对棉籽油的加氢反应，分析了焙烧温度对Ｐｄ／Ａｌ２Ｏ３活性的影响．结果表明，４７３Ｋ下焙烧的Ｐｄ／Ａｌ２Ｏ３活性较好；高温（９７３Ｋ）下焙烧的Ｐｄ／Ａｌ２Ｏ３活性最差．欲制备高活性的Ｐｄ／Ａｌ２Ｏ３催化剂，必须严格控制焙烧温度．     

复合固体酸TiO2—SnO2—Al3O3催化合成柠檬酸酯的研究

首次将ＴｉＯ２－ＳｎＯ２－Ａｌ３Ｏ３复合固体酸催化剂用于催化合成柠檬酸酯,柠檬酸２ｈ的转化率达９９．３％。催化剂制备及合成柠檬酸酯的较好工艺条件是：Ｔｉ／Ｓｎ／Ａｌ（摩尔比）１：１：３,焙烧温度５５０℃,熔烧时间３ｈ,催化剂用量１．２％（占酸醇总量）,酸／醇（摩尔比）１：５,反应时间２ｈ。该催化剂具有良好的重复使用及再生性能。     

制备条件对Pd／Al2O3催化棉籽油加氢活性的影响

使用ＳＥＭ，ＥＤＳ，ＥＰＭＡ，ＸＲＤ及ＸＰＳ在对不同温度下，于空气气氛中焙烧的贡载型钯催化剂Ｐｄ／Ａｌ２Ｏ３进行了表征，结果对棉籽油的加氢反应，分析了焙烧温度对Ｐｄ／Ａｌ２Ｏ３活性的影响。结果表明，４７３Ｋ下焙烧的Ｐｄ／Ａｌ２Ｏ３活性较好；高温下焙烧的Ｐｄ／Ａｌ２Ｏ３活性最差。欲制备高活性的Ｐｄ／Ａｌ２Ｏ３催化剂，必须严格控制焙烧温度。     

甲醇脱氢制备甲酸甲酯的催化性能研究

将浸渍法制备的Ｃｕ／ＳｉＯ２、Ｃｕ－ＺｎＯ／ＳｉＯ２、Ｃｕ－ＺｎＯ－ＺｒＯ２／ＳｉＯ２,以及Ｃｕ／γ－Ａｌ２Ｏ３、Ｃｕ－ＺｎＯ／γ－Ａｌ２Ｏ３、Ｃｕ－ＺｎＯ－ＺｒＯ２／γ－Ａ六种催化剂应用于甲醇脱氢制甲酸甲酯反应。实验结果表明,以Ａｌ２Ｏ３为载体的催化选择性较差且易积炭失活;加有ＺｎＯ助催化剂的Ｃｕ－ＺｎＯ／ＳｉＯ２性能优于末加助催化剂的Ｃｕ／ＳｉＯ２;加有权助催化剂的Ｃｕ－Ｚｎ－ＺｒＯ２／Ｓｉ     

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.     

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.     

The Analects and the Moment in Peking——The influence of a Confucian education system on the personality formation,the way of thinking and the fate of the main characters

0.Preface China has long been boasting of its colorful and immense culture which comprises of Taoism,Confucianism and Buddhism.The interwoven influence among the religions on Chinese way of thinking,on the nation＇s behavior in their social life throughout the long history is beyond list.