红花主要农艺性状与单株籽粒产量的相关和通径分析

为了分析不同红花品种主要农艺性状与单株籽粒产量的关系,对20个红花品种的10个农艺性状进行了相关和通径分析.结果证明,9个相关性状对单株籽粒产量的影响顺序是百粒重单株有效果球数、二级分枝数分枝长度一级分枝数茎粗顶花球直径株高第一分枝高.多元回归分析表明,茎粗、一级分枝数、单株有效果球数、分枝长度、第一分枝高、百粒重为影响单株籽粒重的主要因素.通径分析发现,百粒重、一级分枝数对单株籽粒产量影响最大,因此,在适当控制茎粗、分枝长度、第一分枝高、单株有效果球数的基础上,将提高百粒重、一级分枝数作为红花品种的主要选育方向.     

海黍子(Sargassum muticum)不同分枝的形态观察与离体培养

【目的】观察海黍子不同分枝的形态特征,并研究离体培养条件下三生分枝的生长和生殖托数量的变化情况。【方法】采用形态观察法和离体培养技术,分别研究三生分枝在次生分枝上的分布、其数量与次生分枝长度的关系、其长度与生殖托数量的关系,并对离体培养前后三生分枝特定生长率及生殖托数量变化情况进行研究。【结果】三生分枝数量与次生分枝长度呈正相关;生殖托数量同三生分枝的长度呈正相关。离体培养实验期内,生殖托数量增长一般不超过2个;三生分枝均有不同程度的增长,特定生长率多数集中在0%~2%。【结论】海黍子不同分枝尤其是三生分枝的生长和发育有助于海黍子有性繁殖过程,可以保障海黍子群体的不断繁衍。     

分枝马氏过程与超过程的中心极限定理

给出近几年来在分枝马氏过程与超过程的极限理论方面得到的部分结果.主要包括分枝机制满足二阶矩条件的分枝Hunt过程的中心极限定理;分枝机制满足二阶矩条件的一般超过程的中心极限定理;分枝机制是空间齐次的稳定分枝机制的超OU过程的中心极限定理.文章同时涉及到大数律结果.     

影响植物分枝的一些基因及其分子机制

了解植物分枝机理不仅具有理论意义,对于农业、林业、果树、蔬菜和花卉等生产实践更具有重要意义.由于分子生物学的发展,人们有机会获得转基因植物和突变体,利用这些材料从不同角度对植物分枝机理进行深入研究.影响植物分枝的分子机制是多种多样的,对激素感知、激素代谢、激素运输等方面的影响都可以改变植物的分枝状况.目前,分枝的分子机制研究已取得较大进展.     

矮秆蓖麻杂交种产量与主要农艺性状的相关及多元回归分析

对自选的15个矮秆蓖麻杂交组合的产量与主要农艺性状进行了相关及多元回归分析.结果表明:单株产量与生育期、主茎节数、二级分枝有效果穗数间成不显著负相关,与有一级分枝有效果穗数成显极著正相关,与有效分枝数、一级分枝穗蒴果数成显著正相关,与其他性状成不显著正相关.通过逐步回归分析建立了数学模型,通径分析结果表明,一级分枝穗长、一级分枝有效穗数、株高对产量具有正向效应,主茎穗位、生育期对产量具有负向效应.因此选育一级分枝有效穗数多、一级分枝穗较长、穗位低,同时兼顾株高、生育期适中的组合易获得高产杂交种.     

油菜不同部位分枝籽粒生产力对氮肥反应的差异

研究了不同氮肥用量对杂交油菜“秦油2号“主序及各分枝生产力的影响.结果表明, 随着氮肥用量的增加,主序产量占单株产量的比例逐渐降低,施氮量过大则又略有回升.主序籽粒约占产量1/4时,单株产量最高;在不同氮肥用量下,上部分枝生产力的变化趋势类似于主序,而中部分枝则与全株一致;在分枝产量构成因素中,氮肥用量对分枝角果数的影响最大;主序及上位分枝中氮素累积量受氮肥用量的影响程度较小,而中下位分枝则较大.     

顺序分枝法—零件归类成组的一种实用方法

零件归类成组是实施成组技术的基础。提出的顺序分枝法是一种较为完善的、用于零件分类的生产流程分析方法。 本文论述了顺序分枝法的基本原理。顺序分枝法乃是将待分类的全部零件按其工艺流程遂个地判别,使之归属于相应的各级分枝组,进入各级分枝组的零件在工序(主要的)数目和顺序上完全一致;然后,遵循推荐的原则把各级分枝组合并为零件种数适当的加工族。 顺序分枝法为计算机辅助零件分类提供了逻辑、判断模式。本文列出了采用顺序分枝法的计算机辅助分类的结果。     

关于随机环境分枝过程混合重组的一个注记

给定一个繁衍概率母函数均值待定的两状态独立同分布随机环境分枝过程,证明了若该随机环境分枝过程是下临界的,则通过适当选择其繁衍概率母函数均值的取值后,它的两个独立复制过程总能够混合重组为一个上临界随机环境分枝过程;但反之,若该随机环境分枝过程是上临界的,则它的两个独立复制过程不一定总能够混合重组为一个下临界随机环境分枝过程。     

番茄分枝方式的形态学和解剖学观察研究

对番茄茎分枝方式的形态学观察及相关部位解剖结构的观察分析,结果表明:番茄的分枝方式为互生的不等二叉状合轴分枝,其花序实际上为顶生花序.讨论并界定了二叉状分枝和花(花序)腋外生的概念.提出一新的形态学术语——假节.     

一种带有寄生分枝的倒置F型双频天线

提出一种新型的带有寄生分枝的双枝倒置F型内置双频天线（IFA）。该天线以传统的平面倒置F型天线（PIFA）为基础,采用单馈点同轴线馈电和带有寄生分枝的双辐射分枝形式,并综合运用分枝弯曲及反复曲折、容性垂直单元加载和在天线辐射分枝上开槽等技术。仿真和实测结果表明,所提出的天线满足900MHz／1800MHz双频段通信系统的要求。     

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