计算机程序语言在初等数论中的应用

随着电子计算机的诞生和信息时代的到来,计算机与数论的关系越来越密切。这不仅体现在计算机在数论中的广泛应用,还体现在数论在计算机技术和网络领域的重大作用。尤其是计算机高级程序语言的诞生对数论的研究提供了强有力的工具。文章主要介绍计算机程序语言在的标准分解、Euler函数、中国剩余定理、Legendre符号等初等数论问题中的应用。     

scbf(n)函数的均值

引入了一个新的数论函数,并利用解析方法及可乘性质研究了这个数论函数的均值性质,给出了这个数论函数的一个渐近公式.     

初等数论在密码学中的应用

目的随着通信的数字化和计算机技术的发展,讨论数论这门古老的学科在密码学中广泛而深入的应用。方法从数论知识的角度,介绍同余理论、算术基本定理、中国剩余定理等在密码学中的应用。结果数论广泛应用于密码算法和各种密码协议中,给出其在字符密码、RSA公钥和密钥共享中的应用。结论数论在密码学中发挥着越来越重要的作用,数论与密码学密切相关。     

二个均值渐近公式

引入了一个新的数论函数,并利用解析方法及可乘性质研究了这个数论函数的均值性质,给出了这个数论函数的二个均值渐近公式。     

陈氏定理介绍——关于陈景润在数论上的新贡献

数论是研究整数性质的学问。由于数论问题的对象明确而困难,这就促使人们在研究数论时,想尽了种种方法,发展下来,数论至今便按方法分了类,有初等数论,解析数论,几何数论以及代数数论等分支。陈景润二十多年来的数学研究工作,对于解析数论方面作出了卓越的贡献,尤其是在古德巴赫(Goldbach)问题上达到了世界领先的高峰,引起了国内外数学界的高度重视。为了把陈氏定理介绍得清楚起见,今先说一点必需的数论基本概念与术语如下:除了1与本身以外,再也没有其它自然数因子的那种自然数,叫做素数(或称质     

我国初等数论课程教学改革的必要性及途径

结合初等数论课程教学实践,在分析我国初等数论课程教学现状的基础上,论述了进行初等数论课程教学改革的必要性,进而从教学观念的转变、教材内容的改革、教学方法的改进等方面探讨了我国初等数论课程教学改革的可能性途径,希望由此获得该课程教与学的"双赢".     

论数学思想方法在初等数论中的应用

通过对初等数论中重要定理的证明的回顾,以及几类数论问题的解决思路的总结,探讨了数论中蕴涵的转化、整体、配对及群论思想方法。     

杭州师范学院获国家、省自然科学基金资助项目简介

数论及其应用数论是数学学科中历史悠久的一个分支，长时间来，被认为是“很难有实际应用可能性”的纯理论学科。20世纪70年代，以数论为基础的公钥密码体制的出现，在科学界引起强烈反响，改变了人们对数论的应用研究的看法。于秀源教授自1986年开始对数论应用作研究。1989年以来，他先后主持的《数论及其应用群两项国家自然科学基金资助项目，和《无理数和伪随机数》等两项浙江省自然科学基金资助项目，都是以数论在密码学中应用为中心进行的理论研究，包括对同余方程的解数及最小解的分析，数论函数的阶的估计，无理数位数码的值分布，数…     

剩余类环Z_M与Z_M上的数论变换

剩余ZM类环是一类特殊的环.数论变换是以正整数M为模的正整数环(域)ZM上定义的线性正交变换.所用的计算方法是数论中的同余运算.介绍了剩余类环ZM上的几个方面的知识点,以及ZM上的数论变换的有关理论,及其数论变换应注意的几个问题.     

两个新的数论函数的均值

目的研究两个新的数论函数的性质。方法利用解析方法。结果给出两个新的数论函数均值的渐近公式。结论促进了这两个新的数论函数的研究。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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     

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