J／Ψ粒子产生中xF〈0范围内的能量损失

根据色蒸发产生机制，应用三种不同的能量损失模型计算了RHIC和HERA能量下J／φ粒子产生中的核依赖性，给出了不同模型下xF〈0范围的α（xF）的xF分布，并与实验数据进行了对比．研究表明：选用相同的核遮蔽因子时，不同能量损失模型在xF〈0范围内的计算结果存在很大差异，与实验数据的吻合程度也明显不同，这表明并非所有的模型在xF〈0范围内都是适用的．     

复合型裂缝应力强度因子与能量释放率的关系

基于断裂力学理论和最大应力准则,结合单一型裂缝应力强度因子K与能量释放率G之间的关系和能量法,推导出Ⅱ-Ⅲ复合型裂缝K与G的关系公式;通过有限元软件对Ⅱ-Ⅲ复合型裂缝进行模拟,计算出Ⅱ-Ⅲ复合型裂缝的应力强度因子和能量释放率。模拟值与理论值之间的相对误差为4.44﹪,在允许范围内,验证了公式的合理性。     

微地震震源地震波能量的计算方法

由工程爆破中普遍采用的质点峰值振动速度与炸药量和震源距关系的经验公式推导出质点峰值振动速度与震源能量和震源距关系的经验公式,并作为微震地震波能量衰减公式.在公式中引入地震波能量特征系数K1描述震源能量与震源峰值振动速度之间的比例关系,并认为K1主要与震源场地介质特征有关,而与爆破参数无关.通过校验炮数据的回归分析获取监测区域能量特征系数K1.采用能量衰减模型,以微震事件各测点的峰值振动速度、震源距及K1为已知量,以震源能量及衰减系数为回归参数进行回归计算,直接反演出震源能量.本文方法为震源能量计算提供了新的思路和方法.     

微地震震源地震波能量的计算方法

由工程爆破中普遍采用的质点峰值振动速度与炸药量和震源距关系的经验公式推导出质点峰值振动速度与震源能量和震源距关系的经验公式，并作为微震地震波能量衰减公式.在公式中引入地震波能量特征系数 K1描述震源能量与震源峰值振动速度之间的比例关系，并认为 K1主要与震源场地介质特征有关，而与爆破参数无关.通过校验炮数据的回归分析获取监测区域能量特征系数 K1.采用能量衰减模型，以微震事件各测点的峰值振动速度、震源距及 K1为已知量，以震源能量及衰减系数为回归参数进行回归计算，直接反演出震源能量.本文方法为震源能量计算提供了新的思路和方法.     

三部图K(m,n,r)-A(|A|=2)的色唯一性

设G是简单图,用P(G,λ)表示图G的色多项式,令K(m,n,r)表示完全三部图.证明了1)当3≤m≤n≤r时,令s=1/√6√(n-m)2 (r-n)2 (r-m)2 12,若m n r＞2√3s 3s2,则K(m,n,r)-A(|A|=2)是色唯一图;2)当m≥4时,K(m,m,m)-A,K(m,m,m 1)-A,K(m,m 1,m 1)-A,(|A|=2)都是色唯一图;3)设n,k为非负整数,则当n＞k2 2√k2 6 k 2时,K(n-k,n,n)-A;当n＞k2 2√k2 6-k/3 2时,K(n,n,n k)-A;当n＞2√3k2 6 k2 2时,K(n-k,n,n k)-A(|A|=2)均为色唯一图.     

不同载体-宿主菌组合对重组蛋白表达量的影响

研究了不同载体-宿主菌组合对毕赤酵母重组蛋白表达量的影响。以豹蛙抗瘤酶(onconase,ONC)、IL-1α、IL-1β、IL-1Ra、人血清白蛋白(human serum albumin,HSA)与ONC的融合蛋白即HSA-(Gly_4Ser_1)_3-ONC(简称HSA-ONC)等5种重组蛋白为报告蛋白,设计并合成了5种基因。分别插入3种酵母表达载体p PIC9、p PIC9K和p PICZα-A中,转化3种毕赤酵母受体菌X-33、GS115和SMD1168。筛选得到7种载体-宿主菌组合,在摇瓶规模进行诱导并定量。研究结果表明:5种外源蛋白在p PICZα-A/X-33组合中表达量最高,在p PIC9/SMD1168组合中最低。从重组蛋白表达量来说,p PICZα-A/X-33组合优于其他6种载体-宿主菌组合。     

烟幕遮蔽能力的测试方法研究

烟幕的遮蔽能力是评定烟幕剂性能的一项重要技术指标。 本研究在运用全遮蔽能力定义(TOP=1/C_t·L_t)和朗伯-比耳定律(I=I_0~e~(6cL))求全遮蔽能力公式(TOP=K·log(I/I_0))的基础上,进一步提出了测定烟幕遮蔽能力的方法——比较法:(TOP_x=TOP_(基准)·(log(I/I_0)_x)/log(I/I_0)_(基准))本研究是以单质黄磷烟幕为基准的。 实验表明,比较法克服了人眼睛直接观测的困难和主观臆断性,提高了测试精度和分辨能力。它不仅适用于不同组份烟幕剂的烟幕遮蔽能力侧定,而且能适用于同组份不同配比的烟幕剂的遮蔽能力测试。     

拉、弯组合下单边裂纹板的线弹性解的随机有限元分析

本文给出了单边裂纹板在拉、弯组合作用下的断裂强度因子K在幂律指数时的有限元解K及其随机特征量,并与线弹性解进行了比较。     

车辆动力总成悬置系统的能量法解耦仿真分析

针对某国产车辆的橡胶悬置系统,应用机械系统动力学仿真分析软件ADAMS,建立了动力总成悬置系统六自由度的动力学模型.通过对动力总成橡胶悬置系统在不同工况下的自振频率、振型、系统的能量分布的计算,得到系统解耦的能量指标,并以该能量指标为设计目标,以各悬置的平动位移和角位移以及橡胶悬置的刚度系数为约束条件进行优化设计.优化结果表明:[1]Ryy方向的能量分布受刚度系数K.的影响最大,且优化后K9降低了66.51;在第1、4阶Ryy方向的能量分布明显增加,使能量集中分布,减少了这2阶系统能量的耦合程度,即Ryy方向的振动藕合程度减小,提高了隔振效果.[2]x和y方向的能量分布主要受K4的影响,而Rxy和Rzz方向的能量分布主要受到K1、K3的影响;随着能量分布在Rxy和Rzz方向的集中,K1明显减小,而K3显著增加,即悬置系统在x方向的刚度减小,在z方向的刚度增加.[3]优化后的动力总成悬置系统能量分布的解耦程度明显优于优化前系统,优化后悬置系统的隔振性能有所提高.     

基于接收信号强度测量的室内定位算法

首先对现有的“路径-损耗”模型进行了修正,引入距离估计误差随机变量,由于其一般误差较小,不足以改变现有的模型中遮蔽因子的概率密度函数,所以遮蔽因子仍然满足正态分布．然后,推导了一种迭代最大似然估计算法,通过有限次的迭代,可以将由遮蔽因子导人的误差减小到一定程度,并得到令人满意的用户位置的估计结果．模拟表明,该方法可以提供较高的精度。     

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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