KTP和BBO晶体对1.06μm皮秒光脉冲的倍频效率

用５ｍｍ的ＫＴＰ（ＫＴｉＯＰＯ４）和ＢＢＯ（β－ＢａＢ２Ｏ４）非线性晶体，对皮秒的ＣＰＭ，Ｎｄ∶ＹＡＧ脉冲激光的腔外倍频效应进行研究，获得倍频能量转换效率分别为４２％和３２％，证明ＫＴＰ倍频效率高于ＢＢＯ，结果与理论分析相符．     

锗酸铋晶体快中子辐照损伤及其等温时效研究

锗酸铋（BGO）晶体作为一种优良的无机闪烁体被广泛用于高能物理和γ辐射探测技术中，这必然涉及辐照损伤的问题。该文试图对锗酸铋晶体的辐射损伤形成机理予以描述，对其进行两种不同剂量的14MeV快中子辐照和室温等温时效以及高温退火处理，将辐照前后的BGO闪烁体作为探头，测定其本底谱和^137Cs的γ能谱。通过分析BGO闪烁体的峰总比、能量分辨率及道漂等变化，来揭示BGO快中子辐照损伤的形成和退火回复机制。     

γ-辐照降解偶氮染料水溶液的研究

以２．９６×１０１４Ｂｑ６０Ｃｏ为辐照源，对直接耐晒大红４ＢＳ等五种偶氮染料水溶液进行γ－辐照。结果表明，它们能有效降解和脱色，剂量为１２ＫＧｙ时，其降解度为３０～８０％，脱色度均超过８０％，ＣＯＤ去除率为５０％～６０％。另外，还做了吸收剂量、乙醇和Ｈ２Ｏ２的影响试验，并对结果进行了讨论     

偏硼酸钡晶体中(B_3O_6)~(3-)基团正则振动频率的计算

利用Ｇ－Ｆ矩阵方法计算了偏硼酸钡晶体的（Ｂ３Ｏ６）３－基团的正则振动频率,得出了正则振动模的对称坐标,计算了力常数、势能相对于对称坐标和力常数的分布,为β－ＢａＢ２Ｏ４晶体内振动谱线的归属提供了依据     

偏硼酸钡晶体中（B3O6）^3—基团正则振动频率的计算

利用Ｇ－Ｆ矩阵方法计算了偏硼酸钡晶体的（Ｂ３Ｏ６）＾３－基团的正则振动频率,得出了正则振动模的对称坐标,计算了力常数、势能相对于对称坐标和力常数的分布,为β－ＢａＢ２Ｏ４晶体内振动谱线的归属提供了依据。     

BOB的β_2多晶体的析出

ＢＯＢ是油脂中最稳定的成分之一，以它的β２晶体做为晶种投入待调温的巧克力中，既可减少晶种投入量，又可提高产品稳定性。但ＢＯＢ因碳链长，熔点高，晶体转移慢，制出ＢＯＢ的β２晶体耗时极长。本研究找出循环温度、粉碎及最佳处理温度等条件，只用８天即制出ＢＯＢ的β２晶体     

新型磁光石榴石薄膜的液相外延生长

对高掺铋（ＹｂＴｂＢｉ）３Ｆｅ５Ｏ１２及（ＥｒＧｄＢｉ）３Ｆｅ５Ｏ１２激光单晶薄膜的液相外延生长进行了实验研究，用液相外延法将薄膜生长在大晶格常数的ＣａＭｇＺｒ：ＧＧＧ基片上，实验中采用新的材料配方与工艺技术，特别是在薄膜晶体生长中采用变化熔料温度与基片转速的新技术，生长出多分层而不开裂的薄膜，使用Ｄ／ＭＡＸ－ⅡＢ型晶体衍射仪测量了样品的Ｘ射线衍射谱，并对实验结果进行了分析。     

铜双晶体及其组元单晶体循环变形行为的比较：Ⅱ.晶界附近形变？…

在铜双晶体（ＣＢ，ＲＢ）及其组元单晶体（Ｇ１，Ｇ２）循环应力－应变响应比较的基础上，观察了双晶体（ＣＢ，ＲＢ）及其组元单晶体循环变形后表面滑移形貌及疲劳裂纹萌生，结果表明实际双晶体ＲＢ晶界附近组元晶体Ｇ２中出现以次滑移为主的晶界影响区，且晶界区随应变幅增加而变宽。     

新型磁光石榴石薄膜的液相外延生长

对高掺铋（ＹｂＴｂＢｉ）３Ｆｅ５Ｏ１２及（ＥｒＧｄＢｉ）３Ｆｅ５Ｏ１２磁光单晶薄膜的液相外延生长进行了实验研究．用液相外延法将薄膜生长在大晶格常数的ＣａＭｇＺｒ：ＧＧＧ基片上，实验中采用新的材料配方与工艺技术，特别是在薄膜晶体生长中采用变化熔料温度与基片转速的新技术，生长出多分层而不开裂的薄膜，使用Ｄ／ＭＡＸ－ⅢＢ型晶体衍射仪测量了样品的Ｘ射线衍射谱，并对实验结果进行了分析     

锗酸铋晶体中子辐照诱导色心的研究

对锗酸铋晶体进行了两种不同剂量的14.6MeV快中子辐照.利用常规的核探测技术,通过测量其辐照前后　Cs的γ能谱来观察峰总比的变化,研究了辐照诱导色心对于荧光输出和中子剂量对于辐照诱导色本底能谱和137心密度的影响.     

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.     

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.     

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.     

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.     

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.     

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.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that