中国东北槭树属（AcerL.）七种植物花粉形态研究

用光学显微镜和扫描电镜观察了分布于我国东北地区的七种槭树属（ＡｃｅｒＬ．）植物花粉形态,本属花粉为近球形,亚长球形,亚扁球形,极面观为三裂圆形,花粉大小为（２１．４～３５．５）μｍ×（１８．７～３３．９）μｍ萌发孔类型为三沟,三拟孔沟,根据扫描电镜观察,槭树属花粉外壁多为条状纹饰,有时在条状纹饰上分布着许多小穿孔,只有糖槭（ＡｃｅｒｎｅｇｕｎｄｏＬ．）花粉外壁为细网状纹饰,网脊相连成条纹,花粉形态     

双参考光相移全息干涉计量

本文描述了一种性能优良的条纹分析系统.该系统将相移技术应用于全息干涉计量中,能自动、快速、准确地获得干涉图的相位场.分析一幅条纹图(256×256×8bit)仅需2分钟,重复精度可达±5°.     

3种黑麦类作物花药和花粉粒显微形态学比较

以3种不同倍性黑麦类作物为材料进行体视镜花药形态观察和扫描电子显微镜花粉粒形态观察。体视镜花药形态观察结果显示,六倍体小黑麦和八倍体小黑麦花药颜色相近,形状相似,二倍体黑麦与上述两者在花药形态方面有明显差异;3种不同倍性的黑麦类作物在花药大小上有显著差异。扫描电镜花粉粒形态观察结果显示,3种不同倍性黑麦类作物的花粉粒极轴长和赤道轴长存在差异,外壁纹饰都是颗粒状纹饰,但颗粒的大小排列疏密程度各有不同。本次研究通过对3种不同倍性黑麦类作物花药和花粉粒的显微结构观察和比较,给出了3种黑麦类作物之间的异同点并探讨了其分类学意义。     

流体攻角对滴形钉头管流体阻力特性的影响

利用风洞实验 ,研究了Re =1× 10 4～ 1× 10 5范围内滴形钉头管在不同攻角下的流阻特性 .实验结果表明 ,攻角对滴形钉头管的流阻特性影响显著 ,流阻最小值出现在攻角α为 180°时 ,最大值出现在攻角α为10 0°～ 110°时 .还给出了不同攻角下Eu与Re之间的关联式 .     

广西乐业大石围大型岩溶漏斗的形成特征

大石围大型岩溶漏斗位于云贵高原南缘的桂西北边陲的岩溶斜坡地带.红水河右岸百郎地下河上游的高楼至韩家沟风岩洞地下河支流的中段.地面标高1 000 m～1 500 m,漏斗口直径为500 m×380 m,口部面积为1.4×105m2,底部直径为200 m×100 m,底部面积20 000 m2,总容积为3×107m3～5×107m3.其深度和容积在世界同类大型岩溶漏斗中位居第5位或是中国的第3位.研究表明,区域构造或垂向深切"X"型共轭节理、裂隙, 对岩溶漏斗周边岩壁的崩塌和平行后退起着至关重要的作用;而第四纪以来的大幅度抬升,是造成岩溶向纵深发育或漏斗深切作用的主要原因.大石围岩溶漏斗是地表和地下岩溶的长期共同作用,逐渐崩塌、扩大其容量和增加其深度而实现的.     

稳定区的第二类6×6核素分布区

在氘氚结团核素图中说明了坐标S=2Z-N与加J=S+K常数列确定的13个6×6核素区分布情况.这类核素分布区可组成14个由3个6×6核素区组合成的单位区或16个并列双3区;8个6×6核素区组合成5个亚区,一个亚区是坐标S的2×4区,一个亚区是差K的3+5区,还有3个是3平行线共线组合区,5个亚区中心沿5核素I12753327421,Cs13255337722,La13757348023,Ce14058348224Pr14359348425和分布.核素区的范围是坐标S24～S42,H42～H2与(S+K)=34～54.组合区中心的数值显示出美妙的联系.     

钠双线对干涉牛顿环的影响

本文根据干涉原理,讨论钠光源（钠双线）对等厚干涉-牛顿环产生的影响,由于干涉条纹的间隔与光波波长有关,因而波长仅差5,893×10－4μm的钠双线所产生的两组牛顿环叠加使干涉条纹的可见度下降.     

铊的环境生态迁移与扩散

报道某含铊黄铁矿矿石和各工艺过程产物中铊的含量和分布 ,各类矿石中铊含量范围 10 .0～ 5 6 .4× 10 -6;尾砂矿中铊含量约 5 0× 10 -6;炉渣中铊含量范围 2 1.7～ 4 5 .4× 10 -6;炉灰中铊含量 30 .2～ 6 8.1× 10 -6;矿区山泉水中铊含量 0 .35～ 7.86× 10 -9;选矿水中铊含量 4 .82× 10 -9;自来水中铊含量 10～ 30× 10 -12 ;硫酸厂解析水中铊含量5 5 .2～ 4 5 0× 10 -9;炉尘冲洗水中铊含量 17.1～ 37.9× 10 -9;炉渣冲洗水中铊含量 4 .2 2× 10 -9;排放水中铊含量 9.30～ 2 1.6× 10 -9.根据这些数据 ,讨论了铊在自然环境中的迁移、转化、扩散过程和生态污染 ,提出了在含铊矿产资源利用过程中 ,必须高度重视铊的环境污染效应和后果 ,采取必要的预防污染措施 ,同时应积极开展治理技术研究 .     

阳离子表面活性剂-AuI-2体系光谱特性及应用

在HCl介质中,AuI-2与阳离子表面活性剂可形成较稳定的缔合微粒,它在560nm产生一个吸收峰,在320,470nm产生2个同步散射峰,在580nm产生1个共振散射峰.在一定条件下,阳离子表面活性剂浓度在0～7.0×10-5mol/L范围内遵循比尔定律,摩尔吸光系数高达1.904×104L·mol-1·cm-1.用于合成样和新洁尔净样品中阳离子表面活性剂的测定,结果满意.     

高锰酸钾-甲醛-多巴酚丁胺化学发光体系的研究

在酸性条件下,盐酸多巴酚丁胺与高锰酸钾能够产生微弱化学发光,而甲醛能够大大地增强该发光.在一定条件下,发光强度与多巴酚丁胺的浓度呈良好的线性关系.由此并结合流动注射分析技术,建立了一种测定多巴酚丁胺的新方法.方法的检出限为8 7×10-9g/mL(IUPAC),线性范围为1 0×10-8～1 0×10-6g/mL,对1 0×10-7g/mL多巴酚丁胺平行测定11次,其相对标准偏差为2 3%.     

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.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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