不同叶幕结构对赤霞珠葡萄生长发育的影响

为探索酿酒葡萄赤霞珠不同叶幕结构对葡萄果实品质的影响,自2001年至2002年对河北省秦皇岛市酿酒葡萄赤霞珠适宜的叶幕结构进行了研究。试验试材为2.5m×0.5m栽植密度,1.60m架高的双篱架赤霞珠,四根横梁距地面距离从下到上依次是40,80,120,160cm时,在葡萄上架时进行以下处理:A横梁上铁丝间水平距离分别为:35,60,100,150cm。B横梁上铁丝间水平距离分别为:30,50,90,120cm。C横梁上铁丝间水平距离分别为:20,40,70,100cm。D横梁上铁丝间水平距离分别为:50,90,100,110cm。通过对不同架式赤霞珠枝叶生长、果实发育、枝条成熟等指标调查测定,结果表明:处理间光合强度、光照度、叶片生长发育、枝条生长、果实品质等多项调查测定指标没有规律性的显著差异。上口间距100cm和120cm的处理有利于葡萄枝条成熟,120cm处理的产量较高。150cm处理的架面不易保持稳定。     

步冷试验温度曲线剖析

对加氢反应器常用材料2.25Cr-1Mo钢进行了步冷试验、经步冷再经593℃×1 h热处理试验以及步冷加538℃×15 h热处理试验.结果表明,步冷试验温度曲线中的第一阶段(593℃×1 h)和第二阶段(538℃×15 h)热处理过程在再次步冷试验过程中是一个脱脆过程.     

深州蜜桃F1代初果期果实性状的变化

为了解果实性状的形成规律及性状间的相关规律,以深州蜜桃实生后代为材料,从第一次结果开始,逐年记载各单株的开花期、成熟期、单果重、甜酸味、可溶性固形物含量、香味、苦味、果汁、着色度、果形和果顶形状,并在年度间进行趋势分析、相关分析和通径分析。结果表明：随实生树结果年龄的增加,果实生育期相对稳定,果实的内部品质有提高的趋势,外观品质受当年树体条件和环境条件的影响较大,多数果实性状在年民间表现了不同的相关和决定程度。     

遮光处理对酿酒葡萄果实品质的影响

文章以"赤霞珠"葡萄品种为材料,设置不同遮光条件,调查光照条件对宁夏贺兰山东麓酿酒葡萄果实品质成分的影响。结果表明:遮光处理后,葡萄的可溶性固形物、总糖、糖酸比和总花色苷的量显著降低,但是总酸、总酚和单宁的量上升;其中遮光处理对葡萄果实中的单宁影响最大,其次为总花色苷;遮光率为40%条件下,葡萄的可溶性固形物、总糖、糖酸比和总花色苷的量分别下降了4.21%、4.07%、8.85%和13.22%,总酸、总酚和单宁的量分别上升了5.23%、8.46%和43.86%。综合考虑酿酒工艺对葡萄原料的要求,遮光率为40%条件下能够在一定程度上提升酿酒葡萄品质。     

不同留叶量对赤霞珠葡萄品质的影响

以赤霞珠葡萄为试验材料,在果实膨大期对新梢进行不同留叶量的控制,并对赤霞珠葡萄果实品质指标、病果率等进行测定分析。试验结果表明,18片留叶量处理的果实可溶性固形物含量、可溶性总糖含量最高,病情指数最低;随着留叶量的减少,果实可溶性固形物含量、可溶性总糖含量逐渐降低,病情指数逐渐提高;不同留叶量处理的果实有机酸含量、花青苷含量、出汁率、单穗重等均差异不显著。     

改进的膨胀土直剪试验方法研究

通过改变加载板结构和加载形式,改进常规直剪试验装置,使试样在固结过程中保持体积恒定.以广西百色中膨胀土为研究对象,对常规和改进直剪试验结果进行了对比;通过不同干密度下的改进直剪试验,得到了抗剪强度指标随干密度的变化规律;结合研究成果进行了案例工程的稳定性分析.结果表明:改进的直剪试验消除了干密度变化对试验结果的影响,且...     

双-(0，0′-二正丁基二硫代磷酸酯)合镍(Ⅱ)与氮碱加合反应的研究

本文报道了 Ni[(C_4H_9O)_2PS_2]_2与氮碱的加合反应,用光谱法测定了苯溶液中加合反应的平衡常数,在31℃时吡啶加合物的 K_1=33.1,β_2=7.94×10~3,联吡啶加合物的 K=2.51×10~6,用热重分析和 NMR 方法研究了加合物的热分解性质、磁性质和自旋密度分布.当 d~8低自旋的标题化合物与吡啶和正丁胺反应生成 d~8高自旋的加合物时,观察到了顺磁效应,未成对自旋密度离域到吡啶环和正丁胺上,导致各类质子共振向低场位移.未成对电子自旋密度通过σ键体系从 Ni(Ⅱ)离域到配体上.     

葡萄耐氯性研究

在观察施用含氯化肥对葡萄生长发育影响的基础上,以巨峰、红富士为试材,进行葡萄含氯肥料施用效果试验。试验结果得出:葡萄可以使用适量含氯化肥(即树龄三年生以上,密度为120株/亩以下的葡萄株施Cl~-227.5～355.7克/年),不必受“忌氯”束缚,对葡萄生长、产量和品质无不良影响,而对产量、萌芽率、抗病性及果实可溶性固形物等含量的提高,具有一定的促进作用。这种促进作用与氯离子能提高葡萄叶片的叶绿素和可溶性糖含量,增加对灰分元素的吸收有关。但株用量一次超过300克Cl~-时,会引起严重的氯害。     

修正步冷试验方法

以广泛应用于加氢反应器材料2.25Cr-1Mo钢为研究对象,对步冷试验温度曲线进行分析.进行了步冷加524 ℃×24 h和步冷加524 ℃×27 h热处理试验.结果表明,步冷试验温度曲线中的第三阶段524 ℃×24 h热处理在再次步冷试验过程中具有脆化倾向.同时对步冷试验温度曲线进行修正,提出了修正步冷试验温度曲线.     

重庆新白沙沱长江特大桥施工江段鱼类时空分布特征研究

【目的】了解重庆新白沙沱长江特大桥施工江段鱼类的时空分布特征及对该特征可能有影响的环境因子。【方法】于2015年12月22日和2016年3月29日、8月3日、11月2日在大桥上下游江段使用 Simrad EY60回声探测仪对渔业资源进行水声学调查。【结果】4次调查结果显示:大桥上游江段的鱼类平均密度分别为5.8×10-3,9.1×10-3,24.6×10-3和8.4×10-3个 ·m-3,大 桥 下 游 江 段 的 鱼 类 平 均 密 度 分 别 为 7.4×10-3,15.3×10-3,39.4×10-3和20.6×10-3个·m-3;2016年8月3日在大桥下游江段探测到的鱼类密度大于其他3次调查在同一江段探测到的鱼类密度,差异具有统计学意义(p<0.05)。【结论】新白沙沱长江特大桥上下游江段鱼类密度分布不均,下游的鱼类密度比上游的大,夏季的鱼类密度比冬、春季的大;鱼类密度的空间差异性和季节差异性可能与鱼类生命活动的季节变化、当地的河流环境差异相关,也可能与桥梁的施工影响相关。
     

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.     

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     

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

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