金属簇络合物YCCo_3(CO)_9羰化性能的研究

本文研究了金属簇烷川九羰基三钴络合物YCCo_3(CO)_9的羰化活性。同系物HCCo_3(CO)_9、PhCCo_3(CO)_9、ClCCo_3(CO)_9和EtOOCCCo_3(CO)_9在较缓和条件130℃,40公斤/厘米~2,H_2/CO=2时已烯—1羰化克分子转化率95％以上。该类簇络合物还有加氢和双键异构化作用。     

氧化铝担载铂原子簇催化烷烃转化的性能考察

由Pt_3(CO)_3(Ph_3)_4和Pt_4(CO)_5(PPh3)_簇合物制了新型的铂催化剂,并将它们与传统的由H_2PtCl_6制备的催化剂相比较,研充了对烷烃转化的催化活性和甲基环已烷脱氢动力学。结果表明铂簇催化剂对烷烃脱氢不化和芳构化反应具有更高的活性。同时,对于甲基环已烷脱氢提出了以表面反应为控制步骤的反应机理。     

高分子铂一锡(Ⅱ)络合物催化α-烯烃的醛化反应(英文)

本文合成了不同交联度的苯乙烯一二乙烯基苯含膦树脂球,然后与PtCl_2和SnCl_2反应得到高分子催化剂。进一步研究了它催化α-烯烃的醛化反应。结果证明,这种催化剂对正构醛具有极高的选择性(最高达95%)和很高的催化活性。本文还研究了催化剂活性和选择性与烯烃结构,树脂的交联度,催化剂组成,溶剂,反应温度和H_2/CO压力的关系。     

新型含胺基膦配体的钌羰基簇合物HRu_3{μ_3-η~2-P(NEt_2)_2}(CO)_9的合成和结构

本文用 Ru_3(CO)_(12)和二(二乙胺)氯化膦(Er_2N)_2PCl 在较温和条件下反应得到了一个具有新结构和新配位方式的三核簇合物 HRu_3{μ_3-η~2-P(NEt_2)_2}(CO)_3.该簇合物的结构特点是由于配体中磷原子和一个氮原子组成桥参与配位而形成一千五员 Ru_3PN 稳定骨架结构,我们对该簇合物进行了元素分析和 IR,HNMR,MS 表征工作,并进行了 x-光单晶结构分析     

含桥联配体的双核铁羰基簇合物的合成和结构研究

Fe_3(CO)_(12)与亚磷酸三硫代苯酯P(SC_6H_5)_3在温和条件下反应给出三个具有桥联原子的双核铁羰基簇合物(μ-SC_6H_5)_2Fe_2(CO)_5,(μ-SC_6H_5)(μ-P(SC_6H_5)_2)Fe_2(CO)_5和(μ-SC_6H_5)(μ-P(SC_6H_5)_2))Fe_2(CO)_5(P(SC_6H_5)_3).本文对这三个簇合物进行了IR,~1HNMR和MS谱的表征工作,并用z-ray衍射技术测定了它们的单晶结构.     

含氮宾或卡宾的金属羰基簇合物的结构化学研究Ⅱ——Fe_2(CO)_6(PhNCONPh)的合成和结构

Fe_2(CO)_6(PhNCONPh)簇合物是由[Et_3NH][HFe_3(CO)_(11)]和C_6H_5NCO在苯中反应获得。应用四园衍射仪测定了该簇合物的晶体结构。晶体学数据:C_(19)H_(10)O_7N_2Fe_2,空间群P2_1/n,a=8.5062(1),b=13.2752(1),c=18.9038(2)(?),β=98.96(2)°,Z=4和D_c=1.643gcm~(-3)。结构系用直接法解出,最后R 因子为0.031.结果表明,题目簇合物分子是由苯代脲基C_6H_6—N—C(O)—N—C_6H_5中的N 原子,分别和(OC)_3Fe—Fe(CO)_3中的两个Fe 原子键合而成。使各两Fe 与N 原子和一个C 原子形成变形的双三角锥构型。     

无机-有机杂化钴钒酸盐Co4(vIM)14[V4O12]2·6H2O的合成 、结构及C E ES氧化催化性能

以NH_4VO_3为钒源,1-乙烯基咪唑(vIM)为配体,与CoCl_2·6H_2O在水热条件下反应合成了新型无机-有机杂化的钴钒酸盐Co_4(vIM)_(14)[V_4O_(12)]_2·6H_2O (1),利用X-射线单晶衍射(SXRD)、X-射线粉末衍射(PXRD)、红外光谱(FT-IR)以及元素分析(EA)等表征了其结构.我们进一步考察了化合物1在选择性氧化降解化学战剂芥子气类似物2-氯乙基乙基硫醚(CEES)反应中的催化性能.实验结果表明,在优化条件下,以H_2O_2为氧化剂,化合物1对CEES的选择性氧化表现出良好的催化活性,而化合物1作为非均相催化剂经3轮催化循环后活性及选择性都没有明显降低.     

甲醇同系化:反应变数的系统研究

系统研究了催化剂组成及反应条件:I/Co、P/Co、第二金属组份、H_2/CO及反应温度等,对Co_2(CO)_8-PPh_3(或二磷)-CH_3I体系催化剂在甲醇同系化制乙醇反应中的催化性能的影响。这些变数对甲醇的转化率和乙醇的选择性的影响是强烈互相约制的。这些变数的若干优化组合,例如,对含PPh_3体系在I/Co=0.5、P/Co=1.5和H_2/CO=4;或对含二磷体系在相应比例为2、0.5和2或3时,乙醇选择性可高于85％。     

高分子催化剂催化α-烯烃的醛化反应——高分子链对催化剂活性的影响

用合成的新的高分子膦配位体(—CH_2-CH_()—)n,与RhH(CO)(PPh_3)_3进行交换反应,制备的高分子催化剂在催化已烯-1进行醛化反应时,发现了高分子线团的尺寸,高分子链的极性和活动性,以及溶剂效应等对高分子催化剂的活性和选择性有影响,催化侧基在高分子链上的取代程度对催化剂活性影响较小。     

二异丁烯低压水合羰化制3.5.5—三甲基已酸(第一报)

本文试制了Rhcl(φ_3P)_3为催化剂前身,三苯氧膦为稳定剂,HI为引发剂的三种成分的络合催化剂,用于二异丁烯低压水合羰化制3.5.5.—三甲基已酸的反应。在185℃、40kg/cm~2(CO)压力下,二异丁烯36.6毫升(0.249克分子),Rhcl(φ_3P)_30.462克(5×10~(-4)克分子),三苯基膦0.65克(2.5×10~9-3)克分子),HI9毫升(0.05克分子),H_2O_2(30%)10毫升,水6毫升,于钛钢高压釜中反应十小时,二异丁烯获得72.7%的转化,总酸收率为59.1%,对酸的选择性达81.2%,正构/异构=1.64。考察了Rhcl(φ_3P)_3·Rncl_3·3H_2O、Pdcl_2·2H_20三种催化剂对反应性能的影响。     

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.     

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.     

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.     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

正~~