18Cr2Ni4WA钢的组织特征尺寸与其疲劳极限

研究了１８Ｃｒ２Ｎｉ４ＷＡ钢的奥氏体实际是精度和马氏体束径对其疲劳极限的影响．结果表明，这种钢的疲劳极限σｗ与其原奥氏体晶粒度或马氏体板条束径尺寸ｄ的关系为σｗ＝Ｃ＋ｋｄ（－１／２）（Ｃ，ｋ均为常数）；马氏体束径ｄＭ和原奥氏体晶粒度ｄＡ之间的关系为ｄＭ（－１／２）＝Ｃ＋ｄＡ（－１／２）．通过测量钢的组织特征尺寸估算其疲劳性能．     

2,4—二硝基五环[4.3.0.0^2.5.0^3,8.0^4,7]壬烷^1H和^13C…

利用＾１Ｈ－＾１ＨＣＯＳＹ，＾１３Ｃ－＾１ＨＣＯＳＹ，＾１３Ｃ－＾１Ｈ远程ＣＯＳＹ以及选择性远程ＤＥＰＴ＾１３ＣＮＭＲ谱，对２，４－二硝基五环［４．３．０．０＾２．５，０＾３．８．０＾４，７］壬烷的＾１Ｈ和＾１３ＮＭＲ谱进行了完全的归属。     

cis-(QH)_2[M_0O_2(C_2O_4)_2](Ⅵ)的晶体和分子结构

草酸与钼（Ⅵ）反应可以生成多种络合物。根据文献［１］方法，我们制得无色透明块状的ｃｉｓ－（ＱＨ）２［ＭｏＯ２（Ｃ２Ｏ４）２］晶体（式中ＱＨ＋＝Ｃ９ＮＨ８＋）。该晶体属斜方晶系，空间群为Ｐｃｃ２；晶胞参数：ａ＝１２．４９７（４），ｂ＝１０．２６２（３），Ｃ＝１６．７５０（３）Ａ；Ｖ＝２１４８．０８Ａ；Ｍ＝５６４．３２；晶体密度：ｄｏｂｓ＝１．７３ｇｃｍ－３；晶胞分子数Ｚ＝４（ｄｃａｌｃ＝１．７４５ｇｃｍ－３）。晶体在ＣＡＤ－４ 四园衍射仪上用Ｍ０Ｋａ射线收集三维衍射点强度数据，通过三维Ｐａｔｔｅｒｓｏｎ函数和Ｆｏｕｒｉｅｒ函数合成方法，确定了ｃｉｓ－（ＱＨ）２［ＭｏＯ２）Ｃ２Ｏ４）２］的晶体和分子结构。最后，根据Ｉ＞２σ（Ｉ）的１３６３个独立衍射点的强度数据、用最小二乘法把结构精修到Ｒ＝０．０６０，Ｒｗ＝０．０５９。该晶体的阴离子由六个氧原子围绕着Ｍ０原子形成扭曲的八面体。分子具有Ｃ２对称性（ＱＨ）＋和［Ｍ０Ｏ２）Ｃ２Ｏ４）２］２－之间组成了Ｎ－Ｈ…Ｏ类的氢键。     

ZA27合金熔炼

１ＺＡ２７合金的化学成分及机械性能表１ＺＡ２７合金的化学成分主要成分％杂质含量＜％ＡｌＣｕＭｇＺｎＦｅＰｂＣｄＳｎ２５－２８２．０－２．５０．０１－０．０２余量０．１００．００４０．００３０．００２表２ＺＡ２７合金的物理性能σｂＭＰａσａＭＰａδｓ％ＨＢ密度ｇ／３８０－４４１３６５－３７２２．５－１１９０－１２５５．０２材料准备表３炉料合金元素的标准名称牌号标准铝锭Ａ１９９７或Ａ１９９６ＧＢ１１９６－８３锌锭Ｚｎ－０或Ｚｎ－１ＧＢ４７０－８３镁锭Ｍｇ９９．９５ＧＢ３４９９－８３铜Ｃｕ－１ＧＢ４６６－８２中间合金ＡｌＣｕ－５０ＧＢ８７５３５－８８ＺｎＣｌ２二级以上ＧＢ１６２５－７９变质剂自制３工装准备燃油坩埚炉一台；ＷＲＮ－１２０ＥＵ－２测温仪一台；天平一架；其它炉炼工具自制。４熔炼及熔炼过程控制ＺｎＡｌ２７合金的熔炼与传统的有色合金熔炼过程无大的区别，其基本过程大致分为：准备（炉料、设备和工具）、加料、加热熔化、精炼变质、炉前检验和浇注六大步骤，较传统合金熔炼多了一道变质处理工序。其中熔炼过程温度的控制，精炼剂的脱水，合金的变质处理，回炉料的加入量等对合金的机械性能起着至关重要的作用。而整个熔炼过程则紧紧围绕...     

ZA27合金熔炼

１ＺＡ２７合金的化学成分及机械性能表１ＺＡ２７合金的化学成分主要成分％杂质含量＜％ＡｌＣｕＭｇＺｎＦｅＰｂＣｄＳｎ２５－２８２．０－２．５０．０１－０．０２余量０．１００．００４０．００３０．００２表２ＺＡ２７合金的物理性能σｂＭＰａσａＭＰａδｓ％ＨＢ密度ｇ／３８０－４４１３６５－３７２２．５－１１９０－１２５５．０２材料准备表３炉料合金元素的标准名称牌号标准铝锭Ａ１９９７或Ａ１９９６ＧＢ１１９６－８３锌锭Ｚｎ－０或Ｚｎ－１ＧＢ４７０－８３镁锭Ｍｇ９９．９５ＧＢ３４９９－８３铜Ｃｕ－１ＧＢ４６６－８２中间合金ＡｌＣｕ－５０ＧＢ８７５３５－８８ＺｎＣｌ２二级以上ＧＢ１６２５－７９变质剂自制３工装准备燃油坩埚炉一台；ＷＲＮ－１２０ＥＵ－２测温仪一台；天平一架；其它炉炼工具自制。４熔炼及熔炼过程控制ＺｎＡｌ２７合金的熔炼与传统的有色合金熔炼过程无大的区别，其基本过程大致分为：准备（炉料、设备和工具）、加料、加热熔化、精炼变质、炉前检验和浇注六大步骤，较传统合金熔炼多了一道变质处理工序。其中熔炼过程温度的控制，精炼剂的脱水，合金的变质处理，回炉料的加入量等对合金的机械性能起着至关重要的作用。而整个熔炼过程则紧紧围绕...     

2.1μm Co∶MgF_2脉冲激光器

报导了２１μｍＣｏ∶ＭｇＦ２激光器在室温下的实验结果,得到了０２７９Ｊ的２１μｍ激光,器件效率为１４５％测定了Ｃｏ浓度为３％（ｗｔ）的ＭｇＦ２晶体对１３４１４μｍ线的偏振吸收系数,测量结果表明,对该谱线π偏振和σ偏振的吸收系数分别为０８０４ｃｍ－１和０５１６ｃｍ－１．激光实验结果计算得到该晶体２１μｍ线的激光跃迁截面为２６１×１０－２１ｃｍ２．     

M(Pr,Ag)替代的La212型化合物的相变和晶体结构

用固态反应法制备了Ｍ（Ｐｒ,Ａｇ）替代的Ｌａ２１２型化合物,发现Ｌａ２－ｘＳｒｚＣ０．５Ｐｒ０．５Ｃｕ２Ｏ６,Ｌａ１７６Ｐｒ０．４Ｃａ１－ｘＰｒ２Ｃｕ２Ｏ６和Ｌａ２－ｘＰｒｘＣａ０．５Ｓ０。．５Ｃｕ２Ｏε单相范围的ｘ值分别是０．４－１．１,０－０．５和０－１．５。     

2，4－二硝基五环［4．3．0．0~（2，5）．0~（3，8）．0~（4，7）］壬烷~1H和~（13）C NMR的完全归属

利用１Ｈ－１ＨＣＯＳＹ，１３Ｃ－１ＨＣＯＳＹ，１３Ｃ－１Ｈ远程ＣＯＳＹ以及选择性远程ＤＥＰＴ１３ＣＮＭＲ谱，对２，４－二硝基五环［４．３．０．０２，５．０３，８．０４，７］壬烷的１Ｈ和１３ＣＮＭＲ谱进行了完全的归属．     

烧结工艺对含硅锰烧结钢性能与组织的影响

研究了烧结温度和时间对Ｆｅ－３．１Ｍｎ－１．２Ｓｉ－０．４Ｃ烧结刚性能与组织的影响，实验结果表明：提高烧结温度和延长烧结时间都能改善Ｆｅ－３．１Ｍｎ－１．２Ｓｉ－０．４Ｃ烧结钢的机械性能；并使烧结试样由膨胀逐渐向收缩过渡，Ｆｅ－３．１Ｍｎ－１．２Ｓｉ－０．４Ｃ烧结网在１１００℃以上烧结时，由于有液相的出现，合金化过程可以被大大地提高，在烧结过程中，只有那些较小的硅锰母合金颗粒才能全部熔化，而那些尺     

低碳高强度贝氏体钢的研究

本文研究了 Ｃｒ、Ｍ ｎ、Ｖ、Ｔｉ等合金元素对低碳钼硼钢的组织和性能的影响．研究结果表明：成份为０．１５～０１７％Ｃ，０. ５％Ｍｏ，０．００３％Ｂ，１．２～１.６％Ｃｒ，１.６～２．０％Ｍｎ的贝氏体钢．在很宽的冷速范围内（４００～１．９８℃／ｍｉｎ），可以得到完全的粒状贝氏体组织，抗拉强度σｂ＞ １１２０ＭＰａ，且具有良好的综合力学性能，优异的焊接性能及简易的热处理工艺性能．     

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.     

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.     

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。     

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.     

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

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with