渤海中部铅直扩散系数的探讨

根据Ｋｕｌｌｅｎｂｅｒｇ的半理论半经验公式，利用渤海中部８号平台的观测资料，选择强风期的２月和弱风期的７月分别代表冬季和夏季，推算了渤海中部海域冬、夏两季的铅直散系。计算结果表明：Ｋ２值在强风期的２月最大可达５．５ｃｍ＾２／ｓ；在弱风期的７月跃层中可达０．０２～０．０４ｃｍ＾２／ｓ。     

台湾海峡南部1997年8月温度、盐度分布特征的分析

根据１９９７年８月中旬台湾海峡南部海区的ＣＴＤ资料,分析该调查海区温度、盐度的分布特征．其结果表明：１）温、盐垂直分布主要存在单跃层、双跃层及均匀分布３种类型;２）南澳近岸及台湾浅滩南部和澎湖以北海域存在上升流     

台湾海峡南部二测站1997年8月温、盐垂直分布的时间变化

根据台湾海峡南部 ２ 个定点多周日观测站 １９９７ 年 ８ 月的 Ｃ Ｔ Ｄ 资料,进行温、盐垂直分布时间变化的分析,结果表明：二测站调查期间基本上都存在温、盐跃层,跃层的强度和深度随时间变化较大,显示出较为复杂的温、盐垂直分布,与多种水系在此交汇有关．但二测站的下层稳定地存在低温高盐的海水,有向上涌升的趋势,并受潮流的影响,可见其所在的海域应为上升流区     

长江口及邻近海域夏季温盐分布特征数值分析

基于EFDC模式建立长江口及邻近海域三维温盐模型,计算中加入径流、风、潮流和太阳辐射,与2005年7月观测资料进行对比验证表明：该文建立的长江口及邻近海域温盐模型可以较好地模拟该海域夏季温盐分布特征变化.由计算结果分析得到,长江口外夏季等温线呈南北走向,近岸高、口外低,长江口夏季水温分布沿着淡水舌方向由口门外逐渐减小;夏季长江冲淡水特征显著,表层低盐水可越过123° E,在长江口外形成向东淡水舌;长江口外冲淡水作用强烈区域的温盐跃层强度最大,其温跃层强度可达0.3 ℃/m,盐跃层强度可达2/m;长江口外温盐跃层位置重合或接近.     

自补偿式高增益低漂移放大器

本文报道了一种高增益、低漂移的前置放大器，它利用取样保持的方法，实现了运算放大器失调和温漂的自我补偿，从而实现了高增益、低漂移设计思想。实测结果表明，在放大器增益为６０ｄＢ，输入信号为０～５ｍＶ时，输大失调电压为２μＶ，输入温漂为０．２μＶ／℃，非线性误差为０．１６％。     

铈对Ni_3Al性能的影响

在含２０．５ａ％Ａｌ的Ｎｉ３Ａｌ合金中加入铈的研究结果表明：（１）含饰量大约高于０．０４ｗｔ％合金的冷轧性能很差，无法轧成薄材；（２）含铈量为０．０１１ｗｔ％的Ｎｉ３Ａｌ合金，在５５０℃等温１２０ｈ和１２００℃等温０．５ｈ的室温延伸率可达１６％，σｂ为９００ＭＰａ左右，断口为穿晶断裂形貌，综合机械性能好；而７５０℃等温４０ｈ和１０００℃等温１ｈ的室温延伸率仅为３％，σｂ为５００ＭＰａ左右，断口为沿晶形貌，综合机械性能差。     

珠江口以外海域温、盐度的断面分布特征--2001年5月与2002年11月航次

通过2001年5月与2002年11月珠江口以外海域的CTD观测资料，分析调查海域两个航次的温、盐断面分布特征，并将表层温度特征与卫星遥感图象进行比较．结果表明：（1）2001年5月，珠江口以外海域可观察到较弱的上升流迹象；而2002年11月除了陆坡处的海水有涌升趋向外，未见其它上升流迹象．（2）受径流的影响，2001年5月珠江口外表层盐度水平及垂直梯度均较大．（3）两个航次在远岸站位均未形成明显的温跃层，但具有较弱的盐跃层，2001年5月和2002年11月的盐跃层分别位于10～90m和100～120m．（4）两个航次在远岸站位的100-250m层均可观察到部分黑潮次表层水．     

YBa2Cu3Ox超导体中Cl取代O的研究

分别以ＢａＣｌ２和ＣｕＣｌ２为配方试剂之一，制备得到掺Ｃｌ的超导体ＹＢａ２Ｃｕ３ＯｘＣｌｙ（ｙ＝０．２，０．４）。通过对比观测发现，掺Ｃｌ的ＹＢＣＯ超导体样品其Ｔｃ下降，超导转变温区变宽，晶胞参数发生变化，Ｃｌ进入１２３相晶格，文中还讨论了掺Ｃｌ对超导电性的影响。     

表面多孔涂层管强化传热技术研究

设计了以烧结法制备铜表面多孔层的工艺过程，并以丙酮作为介质，测试了所制备的多孔表面强化管的传热性能．结果表明，表面多孔管显著地强化了沸腾给热．以０．０７４～０．０４６ｍｍ紫铜粉和Ｒ粉的复合粉烧结多孔管为例，当热通量为２．００×１０４～６．８５×１０４ｋＪ／（ｍ２·ｈ），沸腾给热系数可达２．２３×１０４～５．２８×１０４ｋＪ／（ｍ２·ｈ·℃），比普通光滑管提高８～２４倍；总传热系数可达３８００～６２３６ｋＪ／（ｍ２·ｈ·℃），比普通光滑管提高０．７～６倍     

舟山以东浅水海域夏季水团及温盐日变化特征

为了探索舟山以东浅水海域夏季水团分布及温、盐日变化规律,基于舟山以东浅水区域时间分辨率为1h的温盐深(CTD)站点数据,首先对数据剖面取平均以研究其温、盐场结构特征,然后利用Fuzzy聚类法对该区域进行水团划分,最后根据水团划分结果分区域统计分析跃层特征,并计算温、盐日变幅极差值以研究其日变化空间的分布特征。结果表明:研究区域可分为沿岸流水团、近岸混合水团、黑潮水团、东海中-深层水团、东海中-深层混合水团;受黑潮支流与沿岸流混合下沉的影响,调查海域中部中-深层水体相对高温、低盐;沿岸流区与黑潮水区10~20m深度层的温、盐日变幅较大,与跃层深度对应较好,表层、次表层的较小,底层的近似为0;近岸混合水团跃层上界深度最大、平均强度最小,该区域表层、底层日变幅相对较大。     

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