189W衰变纲图

用14．8MeV中子同天然锇反应,取道192^O（n,α）反应产生189^W。通过放射化学分离流程,从反应产物中分出W。用高纯Ge探测器完成放射性W样品γ射线单谱的测量。在189^Re激发能级文献值的基础上并依据衰变和能级的关系以及189^W衰变的γ射线能量和相对强度的实验数据．给出了建议的189^W衰变纲图。     

用1—苯基—3—甲基—4—苯甲酰基—5—吡唑啉酮从硝酸中萃取痕量钍

用1－苯基－3－甲基－4－苯甲酰基－5－吡唑啉酮（PMBP）为萃取剂,^234Th作示踪剂,完成了在硝酸介质中痕量钍溶剂萃取行为的研究。在^234Th萃取效率与酸度、萃取剂浓度、平衡时间等依赖关系的条件实验的基础上,获得了萃取钍的最佳条件。使用改进的PMBP萃取钍的流程,从^18O离子辐照过的铀靶中分离钍,钍样品的γ射线单谱显示绝大部分反应产物和大量铀的去除是满意的。     

Hf同位素新衰变γ射线的观测

利用14MeV中子轰击天然钨靶,通过^180,182,183,184,186W（n,2pxn）反应,产生铪的放射性同位素,以γ（X）谱学方法鉴别出铪,观测到了能量为75．2keV和88．7keV的2条新1射线,测定其半衰期为（3．6±0．6）min。     

从CsCl靶中分离I、Ba和Ce的化学流程

用47 MeV/nucleon的12C离子轰击133Cs靶,产生许多种不同元素的同位素.利用经典的化学分离方法,从大量的Cs和其它反应产物混合物中分离出I、Ba和Ce等.使用离线γ谱学方法,完成I、Ba、ce等样品的γ活性测量.根据每种元素不同同位素的特征γ射线峰的强度和丰度,对I、Ba和Ce等样品中杂质的含量进行分析.结果显示该流程对杂质元素去污的效果是满意的.     

195Os衰变性质的观测

由14 MeV中子照射天然铂靶,通过^198Pt（n,α）反应产生^195Os.用γ（X）-γ符合方法搜索了^195Os的衰变γ射线,结果,没有找到可以属于它衰变的γ射线.     

锇的一个重同位素：^197Os

利用14 MeV中子轰击天然铂靶,通过198Pt(n,2p)197Os反应产生锇的一种同位素197Os,以γ(X)谱学方法鉴别了它,同时研究了它的衰变性质.观测到了能量为41.2、50.7、196.8、199.6、223.9、233.1、250.2、342.1、403.6和406.4keV的10条新γ射线,并指定为197Os的衰变.测定它的半衰期为2.8±0.6 min.     

蟹状星云中γ射线的辐射机制

根据蟹状星云中γ射线的观测数据拟合谱,对γ射线的辐射机制进行了分析,通过同步加速吸收的加速机制使电子得到产生γ射线的能量,定性确定了辐射γ射线的电子能量的上限,由观测谱推断高能γ射线是逆康普顿散射机制产生的,并由此确定了不同能量段的γ射线发自星云不同的区域。     

14.9MeV中子和天然铜相互作用中γ辐射的精细研究

利用快中子核反应的全γ辐射测量技术研究了 14 9MeV中子与天然铜反应在 5 5°和90°这 2个角度上的分立γ射线谱 ,由高分辨γ分析程序识别了 10 7条谱线 ;定出了每条谱线在这 2个角度上的微分截面以及相应的反应类型和跃迁能级 ,发现谱线主要来自6 3 Cu(n ,2nγ) 6 2 Cu ,6 5Cu(n ,2nγ) 6 4Cu ,6 3 Cu(n ,n′γ) 6 3 Cu等反应道 .通过分析天然铜的活化本底谱 ,可以看出它是快中子核反应中的最理想的屏蔽材料之一 .     

[（C4H9]4N]5K2TaW11O40H2的合成

通过钽酸钾溶液和粉状白钨酸的反应，合成了属于二十聚系列的钨钽杂多阴离子化合物[(C4H9)4N]5K2TaW1140H2，根据红外光谱、拉曼光谱、化学组成和化学行为，确认该阴离子具有二十聚偏钨酸阴离子[W12O40H2]^6-的结构骨架，可看作为[W12O40H2]^6-中一个WO6基团被TaO6基团取代的结果。     

fac-[Re{η^3-MeN（CH2CH2O）（CH2CH2OH）}-（CO）3]的合成、晶体结构与表征

详细研究了[Re2（CO）10]在TMNO·2H2O的作用下与配体MeN（CH2CH2OH）2的反应,反应产物用二氯甲烷一已烷混合溶剂重结晶,得到Re（I）单核配合物fac-[Re{η^3-MeN（CH2CH2O）（CH2CH2OH）}-（CO）3]。采用元素分析、红外光谱和^1H NMR对配合物的结构进行了表征。用SMARTCCDX射线衍射仪测定了晶体结构,结果表明该晶体属单斜晶系,P21／n空间群。在此晶体结构中,每个铼（I）阳离子与2个氧原子、1个氮原子和3个羰基六配位构成变形的八面体结构。     

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.