关于整数的平方和

借N2 =[12 ,2 2 ,3 2 ,… ]中之数的一种特殊形式的表达式以及N2 中的部分和表推导出N中之数用N2中之数的和来表达的可能性 ,并提出合理的猜想 .对N3 =[13 ,2 3 ,3 3 ,… ]与N4=[14 ,2 4,3 4 ,… ]也得到一部分类似的结果     

N，N‘—二乙基—N,N’—二苯基—3，6—二氧杂辛二酰胺氯化稀土配合物的合成及表征

Simon等 [1 ] 和 Weber等[2 ] 在 2 0世纪 70年代研究和开发的开链冠醚 ,具有很强的与金属离子选择性配位能力 ,易合成、结构富于变化、低毒或无毒 [3] ,可广泛地用于镧系及锕系元素的萃取分离[4～ 6] 和分析化学[7～ 9] .稀土元素已被证明具有许多生理作用[1 0 ] ,一些稀土制剂作为药物已进入临床 .因此研究开链冠醚与稀土离子的配位性能不仅具有重要的理论意义 ,也具有应用价值 .本文报道了以酰胺型开链冠醚 N,N -二乙基 - N,N -二苯基 - 3 ,6-二氧杂辛二酰胺DDD与轻稀土氯化物配合物的合成及性质研究 .1　实验部分1 .1　原料及试剂…     

[Et4N]2[Fe2S2（Sph）4]的晶体结构

[Et_4N]_3[Fe_1S_2(Sph)_4]的合成与晶体结构已有报道,本文给出从金刚烷铁硫簇Fe_4(Sph)_(10)作为起始裂解原料,合成得到[Et_4N]_2[Fe_2S_2(Sph)_4]的单斜晶相的结构。从反应后的乙腈溶液得到片状黑色晶体,选取0.3×0.3×0.1mm~3的单晶在氮气氛     

开链冠醚配合物[Cd(C25H19N3O2)H2O](μ-Cl)[Cd(C25H19 N3O2)Cl][CdCl4]的合成与晶体结构

合成了开链冠醚：2,6-二（8′-喹啉氧甲基）吡啶,并研究了其与CdCl2·2．5H2O的配位反应,得到标题配合物：[Cd（C25H19N3O2）H2O]（μ-Cl）[Cd（C25H19N3O2）Cl][CdCl4],并通过熔点、红外光谱、X-射线单晶衍射进行了表征．标题配合物由两个配阳离子[ClCd（C25H19N3）]^＋,[ClCd（C25H19N3）H2O]^＋和一个配阴离子[CdCl4]^2-组成,两个配阳离子中,中心离子Cd^2＋除与开链冠醚中的N、O原子配位之外,还分别与Cl^-、H2O配位,配位几何构型均为变形五角双锥．两个配阳离子之间通过Cl桥键相连．配阳离子与配阴离子之间通过静电作用形成中性分子．     

体状γ-Fe(N)和Fe4N的合成及其磁特性

利用固气反应原理和方法制备Fe-N化合物.反应气氛为NH 3,H2,[N]和[H]的混合物.分析了NH3的分解过程及[N]和Fe的反应.当NH3/[NH3+H2]的比例为5%～15%(体积百分数)和反应温度为640～680℃时,通过水淬或冰水淬可得到几乎纯净的体状γ-Fe(N).当NH3/[NH3+H2]为16%～50%和反应温度为400～640时,均匀、单一且纯的Fe4N体状化合物可以得到.研究了工艺条件对制备氮化物的影响规律.结果表明:γ-Fe(N)是非磁性的,Fe4N是铁磁性的.其饱和磁化强度、居里温度和矫顽力室温下分别为186A.m2/kg,480℃和0.39kA/m.     

Bridging of Calixarenes with N,N′-Bis(Chloroacetyl)Propylenediamine

0　IntroductionCalixarenes,anewclassofsynthetichostmoleculeshavingphenolicunitslinkedbymethylenegroupsattheortho po sitiontothehydroxylgroup,havereceivedmuchattentionforthehost guestchemistryandsupramolecularchemistryinthelastdecade[1 ,2 ] .Itiswellknownthatthereisremarkabledifferenceonthesynthesisandpropertiesofcalixareneswithvariousnum bersofphenolicunits.Amongthem ,functionalizationofcalix[4]arenederivativesisrathereasy,andselectivefunctionalizationofcalix[8]areneisalmostanimpossibletasktob…     

二氰胺-镧系金属配位聚合物的晶体结构和磁性研究

合成了以二氰胺（N（CN）2）为配体的镧系金属配位聚合物{[Gd（dca）2（phen）2（H2O）3]^＋[dca]^-[phen]）m（dca=N（CN）2,phen=1,10-菲咯啉）．用x射线衍射单晶分析法测定了配合物的结构,晶体为单斜晶系,属于P2。／c晶群,晶胞参数为a=14．2380（11）,b=16．4961（12）．c=17．1927（13）,晶胞数为Z=4．氢键既形成了配位聚合物的3D网络结构,又为相邻Gd金属离子之间提供了磁超交换通道,变温磁化率显示配合物为弱的反铁磁交换作用并符合外斯定律,其中外斯常数θ=-2．37K．     

顺铂代谢物[Pt(L-Met-S,N)2]跨细胞膜的吸收

对顺铂的主要代谢物[Pt(L-Met-S,N)2](Met:蛋氨酸)在Jurkat肿瘤细胞和绵羊红细胞内的跨膜吸收进行了研究,并以顺铂作对照.细胞内铂含量使用等离子体质谱(ICP-MS)测定.结果表明:2种细胞对[Pt(L-Met-S,N)2]的吸收曲线趋势一致,但吸收能力要远远低于对顺铂的吸收,这可能与[Pt(L-Met-S,N)2]的跨膜机制相关,同时进一步证实[Pt(L-Met-S,N)2]没有生物活性.     

用N503和P507萃取处理焦化废水的比较研究

选用N50[3N,N二-(1-甲基庚基)乙酰胺]和P50[7O-(2-乙基已基)-2-乙基已基磷酸酯]两种萃取剂对焦化废水进行萃取处理,在控制油水比、萃取温度及萃取时间等因素一致的条件下,研究不同萃取剂及不同pH值对萃取效果的影响。     

N,N-二甲基-[2Z,4E]-二烯胺的合成

报道了[Z,E]共轭烯烃的一种新的制备方法，从2－甲基吡啶出发，通过烷基化、部分还原、霍夫曼消除等反应，合成了N，N－二甲基－[2N,4E]-二烯胺，全合成总收率在17．1％－27．8％，异构体纯度高达85％－90％。     

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.