面向核辐射领域的飞行监测仪的研究与设计

设计具有飞行、监测能力的核辐射监测仪器.并对国内外现有研究成果以及相关产品进行了研究.本仪器设计的主要特色是针对核辐射地区,采用四旋翼飞行器作为飞行动力单元,并挂载核监测及GPS、GPRS模块,利用飞行器可定点悬停、飞行轨迹设定等优势,通过与辐射安全监控管理系统的无缝对接,实现对核辐射区域的辐射剂量定点式、移动式连续监控测量.并将监测数据实时传递回监控中心,保证监测数据的准确有效,从而减少了工作人员直接进入辐射区域进行测量而造成的伤害.     

飞行监测仪的研究与设计方案

针对核辐射事故现场对辐射泄漏点监测、辐射分布情况分析等应急处理需求,并结合国内外现有的研究成果以及相关产品的发展技术,设计出面向核辐射领域的具有飞行、监测能力的仪器。该仪器的飞行动力单元设计采用四旋翼飞行器,利用其适应环境能力强、可移动的特点,飞入到人不可能到达的地方进行辐射剂量监测,从而保证实时传回监测中心的数据更加准确与可靠。     

多通道辐射监测中主从单片机串行通讯与数据传送的研究

介绍了以多片8031单片机为核心的核辐射监测系统的组成及功能、单片机串行口在主从机之间完成通讯及辐射监测数据传送的软件设计方法,指出了主从多机系统监测的优点。     

基于GSM的核辐射测量系统

为了预防核辐射对环境污染,文章利用全球移动通信系统(Global System for Mobile communications, GSM)技术设计了一套远程核辐射监测系统,用来检测环境中实时的核辐射强度。该系统由若干个测量节点、服务器程序和用户界面组成。单个测量节点由太阳能供电模块、STM32控制器、G-M管传感器、GSM发送模块组成,分布于不同的目标区域并通过GSM技术组建分布式无线传感器网络,用来采集各个目标区域实时的核辐射信号并将该信号发送给系统服务器程序;系统服务器用来收集各个测量节点的实时辐射信号并将收集的信号存储在数据库中,然后将相关的数据传送给提出服务请求的用户;用户可通过人性化用户界面读取各个目标区域的核辐射强度,并对各个目标区域的历史数据进行访问。该系统实现了远程实时监测环境的核辐射强度,为提前发现并预防核污染提供了便利。     

某大型石化公司核辐射仪表运行期环境影响评价

用辐射监测仪对某大型石化公司核辐射仪表的周围环境进行监测,并依据国家有关标准的要求对仪表所安装位置的周围环境进行环境影响分析评价。评价结果表明,该公司使用的核辐射仪表中所带的放射源在正常运行过程中的辐射屏蔽防护符合有关标准要求,对放射性职业工作人员和周围公众的年有效剂量分别低于相应的剂量约束值。     

基于ZigBee无线网络的核辐射监测系统设计

文章提出了一套基于ZigBee无线传感器网络的核辐射监测系统的设计方案。以CC2530芯片为核心,通过核辐射探测器终端节点与ZigBee协调器的无线通信,实时采集并无线传输多个节点位置的核辐射剂量率信息,实现了对一定区域核辐射剂量水平的自动远程监测。该系统具有性能稳定、组网灵活、布置方便以及低成本、低功耗等优点,在测试试验中达到了设计要求。     

基于热力学方法的核辐射放射本能研究

基于Weisskopf的复合核蒸发理论,借鉴热辐射放射本能的研究方法,建立了研究核辐射的放射本能的热力学办法,得到了在单辐射通道情况下静止质量不为零发射物质内部的核辐射放射本能和自由核辐射的放射本能密度通量的计算公式.     

核电厂辐射监测系统仪表构架

介绍了核电厂辐射监测系统仪表构架不同阶段的特点,探讨了目前主流的辐射监测系统的仪表构架的设计趋势,为开展辐射监测系统设计提供有益的参考和建议.     

振动态对H2+谐波辐射频移的影响

理论研究了H_2~+在不同振动态下辐射高次谐波的特点.结果表明,在低振动态下,谐波辐射呈现红移现象.随着振动态增大,谐波红移现象逐渐减弱甚至消失.通过分析谐波辐射时频分析图以及双H核辐射谐波的特点,给出了振动态对H_2~+谐波辐射频移的原因.     

辐射环境领域XML Schema建模

从我国辐射环境领域数据管理的需要出发,参考国际上相关领域的最新进展,将XML Schema技术应用于辐射环境领域数据模型的创建,并应用于实际的核辐射数据库管理系统中.     

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