国际HPM的发展历程及启示

目的探讨国际HPM的发展及启示。方法科学史文献研究。结果介绍了国际HPM兴起的原因；着重介绍了HPM最近20多年的发展，包括HPM团队的发展、HPM学术会议的举办情况、HPM活动期间出版的各类刊物、HPM的前任主席等方面的情况。同时，介绍了世界上不同国家和地区HPM的活动情况。结论国际HPM的发展对于中国数学教育改革具有借鉴意义。     

含羟基马来酰亚胺固化邻甲酚醛环氧树脂

合成N-对羟基苯基马来酰亚胺,并将其用作固化剂固化邻甲酚醛环氧树脂.采用DSC方法研究了HPM固化邻甲酚醛环氧树脂反应的固化反应动力学.对固化产物的热分析结果表明:N-对羟基苯基马来酰亚胺是非常良好的耐热固化剂,可明显提高邻甲酚醛环氧树脂的耐热性能,固化产物的起始热分解温度为338℃,分解10%时的温度为386℃,700℃时的残留百分量为49%.     

地雷电引火头的高功率微波效应研究

高功率微波（HPM）武器是一种对付C^4I和各种电子系统的新概念定向能武器。高功率微波扫雷是一种正在发展的高新技术。通过地雷电引火头的HPM效应模拟实验和用时域有限差分方法（FD－TD），计算HPM照射下地雷电引火头的感应电流，分析了地雷电引火头的HPM效应机理，初步探讨了地雷在HPM作用下的失效模式。     

HPM视野中的问题及方法研究

目的提出国际HPM的研究问题，启发国内开展HPM研究工作。方法用分析归纳的方法阐述讨论集中的具体问题。结果较全面地总结了国际HPM组织关注的主要问题和研究方向，明确其宗旨为在实践上，将数学史成功地运用于数学教学中，以提升数学的学习成效和教学品质；在理念上，树立数学是一门活的科学的新观念。结论国际HPM的研究问题为国内开展HPM研究提供了很好的借鉴与启发，数学史的教育意义体现在具体的实践开发中。     

填料对环氧树脂胶粘剂机械性能的影响

在环氧树脂胶粘剂中加入定量的填料可大大提高胶粘涂层的强度。通过实验得出粉煤灰、未处理蒙(MMTO)、有机化蒙脱土(MMT)三种填料在环氧树脂胶粘剂体系中最佳含量。分析填料的增强作用，并通过XRD分析表明有机化蒙脱土／环氧树脂胶粘剂为纳米体系，获得纳米胶粘剂。对纳米蒙脱土／环氧树脂胶粘剂组分进行优化选择并推荐了纳米蒙脱土／环氧树脂胶粘剂的最佳配方。为其在粘接领域的应用提供基础数据。‘牡￡，^!㈨…L、^……、『，…I     

溴化环氧树脂印刷线路板热解产物的分析

在固定床反应器中惰性气氛条件下应用程序加热方法对典型的溴化环氧树脂基板进行热解试验，用气相色谱／质谱和傅里叶变换红外光谱等方法分析所收集的高沸点液体和气体产物的性质．结果表明，环氧树脂中非溴化树脂结构在热分解过程中发生O-CH2，C-C，C-N键断裂，生成苯酚，且芳香／脂肪醚．环氧树脂溴化部分的热分解中产生1或2溴苯酚，且脂肪链上包含1或2个溴原子的芳香／脂肪醚，证明了C-Br，C-C，N-CH2，O-CH2键的断裂．     

硝化聚酰亚胺／多官能团环氧树脂的相容性及断裂行为

研究了聚酰亚胺的硝化反应，并用ＮＭＲ、红外光谱、元素分析和粘度测定对硝化聚酰亚胺进行表征．将硝化聚酰亚胺与多官能团环氧树脂共混，通过ＳＥＭ、ＤＭＴＡ和三点弯曲试验分析共混物的相容性和断裂行为，结果显示了硝化聚酰亚胺与环氧树脂相容性良好，可作为聚酰亚胺／环氧树脂共混体系的增容剂．但是，纯硝化聚酰亚胺则不能有效地提高环氧树脂临界应力强度因子（ＫＩＣ）和临界应变能释放速率（ＧＩＣ）．     

脉冲频率对钛合金微弧氧化膜/环氧树脂结合强度的影响

采用微弧氧化法在钛合金表面制备了氧化物陶瓷膜，研究了脉冲频率对膜层组织形貌及膜层／环氧树脂结合强度的影响。用剪切法测试氧化膜与环氧树脂之间的结合强度，通过SEM等研究了陶瓷膜剪切前后表面形貌的变化。结果表明：陶瓷膜表面的微孔直径、粗糙度随微弧氧化脉冲频率的增大而减小。陶瓷膜／环氧树脂的结合强度随脉冲频率的增加先是快速上升，当脉冲频率增加至400Hz时膜层的结合强度达到最高56．9MPa，随后结合强度逐渐下降并趋于平缓。     

关于HPM和PME结合的研究

目的探讨HPM和PME结合的可行性。方法通过对HPM和PME的比较，以数学学习心理为依据，结合数学史对数学教学的既有研究，从数学学习层面分析数学史对数学教育的作用。结果数学史通过影响认知因素及非认知因素参与并推动数学学习活动，由此影响数学学习活动的全过程。结论与PME相结合，是HPM被数学教育界认可的一个走向。     

数学史与数学教育研究现状及展望

HPM主要研究数学史与数学教育之间的关系,是数学教育研究的重要组成部分.本文主要通过对HPM研究的相关文献进行分析,指出未来HPM研究有两个需要关注的方向:‘HPM研究’的方法论研究,HPM与PME结合的研究.     

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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