宽鳍鱲对不同化学信息的行为响应

【目的】考察高山急流生境宽鳍鱲(Zacco platypus)的化学信息识别和应答特征。【方法】对比空白实验组以及依次加入与化学预警信息(CAC)溶液和捕食者信息溶液等体积的水、CAC溶液(宽鳍鱲自身皮肤组织提取液)和乌鳢(Channaargus)气味溶液后的宽鳍鱲游泳速度、移动总距离、运动时间比等的行为参数变化。【结果】宽鳍鱲在依次加入水、CAC溶液和捕食者信息溶液后行为反应参数均无统计学意义上的变化。【结论】宽鳍鱲的化学信息识别和应答可能缺失,推测应与急流生境化学信息难以保持、接收和传递,水体透明度高因而视觉信息传递更为准确和有效,以及因食物缺乏而节约能量有关。     

侧条光唇鱼和宽鳍鱲的两个地理种群形态比较

对采集于广东南岭和海南五指山的侧条光唇鱼和宽鳍鱲进行外部形态比较研究.侧条光唇鱼和宽鳍鱲的两个地理种群,五指山的种群生长速度大于南岭种群,但其形态差异不大,两个地理种群仍是同一种.     

鲤亚目三种鱼的核型研究兼论■亚科鱼类的核型演化以及双孔鱼科、胭脂鱼科、鲤科的分类地位

报道了采自西双版纳州的双孔鱼,金线■丽色低线鱲的核型分析结果,讨论了■并科鱼类的倍性关系,否定了中国的宽鳍鱲和马口鱼可能都是三倍体说法。本文从核型演化     

水平荷载下鳍桩承载力的数值模拟

大直径桩广泛应用于近海风电基础中,采用桩侧增加鳍片的方法可有效抵抗水平推力。文章基于有限元分析软件ANSYS,采用服从Drucker-Prager屈服准则的完全弹塑性本构模型,建立了大直径薄壁钢管鳍桩三维有限元模型;针对不同鳍长、鳍宽、桩身长度和桩身直径等因素,分析了水平荷载作用下鳍桩的变形。计算结果表明,鳍桩抵抗水平荷载的能力明显高于普通单桩,与鳍宽相比,鳍长对鳍桩水平承载的能力影响较大。     

宽鳍

对华南森林溪流中鲤形目鲤科(鱼丹)亚科宽鳍     

异鱲的形态及地理分布

异鱲是易危级濒危动物。该种下颌前端正中有1突起，与上颌凹陷相吻合；臀鳍有分支，鳍条5～6根，背鳍起点与腹鳍起点相对或稍后；无口须；腹部有明显腹棱。调查表明，异鱲分布于我国的福建南部，广东、广西南部及越南北部。     

宽鳍Lie的形态学研究

对宽鳍Lie的外部形态及呼吸、消化、循环、排泄、生殖和神经6个系统进行了解剖观察和详细的描述。发现鳔、肠、肾、生殖腺表现出较原始的特征，而形状特异的咽突和清晰可见的间脑，在鲤科鱼类中较少见。     

大鳍鳠臀鳍和脂鳍的比较组织学研究

大鳍鳠臀鳍和脂鳍均是皮肤特化的产物．臀鳍的组织结构可分为表皮层、胶原纤维层、胶原下层和鳍条４部分；脂鳍可分为表皮层、胶原纤维层和脂肪层．臀鳍和脂鳍的表层均与皮肤的表皮相似，而发达的胶原纤维层与皮肤真皮的致密层相当．臀鳍的胶原下层、脂鳍的脂肪层与皮下层相当，而鳍条则是矿化的结缔组织．从特化程度来看，脂鳍的特化程度不如臀鳍高，表明脂鳍应是奇鳍褶的痕迹器官．     

四种鳕鱼的形态学研究

本文对蓝鳕（Micromesistus poutassou），远东宽突鳕（Eleginus gracilis），大西洋鳕（Gadus morhua）和太平洋鳕（G.macrocephalus）等4种经济鳕鱼类进行了细致的观察，对其分节及量度特征进行了测定分析，发现所测数据与国内外资料存在一些差异，并补充描述了各种的身孔、牙齿等形态特征。统计检验表明，蓝鳕的第1臂鳍鳍条数，鳃耙数与其他鳕鱼存在显著差异，远东宽突鳕的脊椎骨数与其他鳕鱼存在显著差异，大西洋鳕和太平洋鳕在上述性状上的差异不明显，但2者的体色有明显差异，从形态特征聚类分析图得知宽突鳕属与鳕属亲缘关系近，而蓝鳕属与鳕属亲缘关系远。     

河道汇流口水力特性对鱼类栖息地的影响

利用河道水流增量法（IFIM）研究了交汇河口汇流比、汇流口下游弗劳德数及汇流口下游宽深比这3个主要水力控制因素对鲤科鱼类及平鳍鳅科鱼类栖息地的影响．结果表明：在交汇河口,水力条件的变化对鲤科鱼类及平鳍鳅科鱼类适宜栖息地分布影响不大;随着汇流比增大,加权可用面积（WUA）逐渐减小;随着汇流口下游弗劳德数增大,WUA迅速减小;随着汇流口下游宽深比增大,WUA逐渐增大,且增幅很小、WIM可以给出鱼类适宜栖息地面积与各水力控制因素之间的定量关系,可为河流管理与决策提供支持．     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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