一种可与安全系统集成的车载导航系统

驾驶、导航与安全保护一体化,可以改善车辆的安全性,提高其舒适程度.车载导航系统采用微惯性测量组合、磁强计、GPS实时测量车辆的姿态和位置信息.通过CAN总线与安全保护系统相连,可以实现导航与安全一体化集成.给出了基于嵌入式工业计算机和数字信号处理器的系统结构、硬件组成及软件工作流程等设计结果.     

基于移动互联网的北斗终端位置信息获取

目前大部分GPS终端上只能在本机上查看位置信息,设计一种在北斗终端获取位置信息,并且能通过手机上查看该北斗终端位置信息的系统,本系统借助4G移动网络系统,通过手机短信方式激活远端的北斗终端,让其先拨号连接运营商服务器,让运营商服务器分配动态IP地址给北斗终端.此时北斗终端将已经获得IP地址回传给手机.则用户就可以使用手机浏览器访问北斗终端的嵌入式Web服务器,最终获取北斗终端的位置信息.     

轨道机动航天器SINS/GPS自主组合导航算法

为了实现空间机动目标的自主导航,提出了一种基于地心惯性坐标系的轨道机动航天器SINS/GPS自主组合导航算法.首先分析了轨道机动航天器的特点,选取地心惯性坐标系作为导航坐标系.然后建立了导航滤波器的状态方程以及量测方程,其中考虑了SINS系统平台失准角、加速度计误差、陀螺仪误差和加速度计的安装位置和航天器质心之间偏差的影响.最后进行了相关的数学仿真验证,仿真结果表明,该算法可以较准确地给出位置和速度导航信息.     

基于GPS的仪表着陆系统飞行检验建模

GPS是新一代卫星导航与定位系统,它定位精度高,具备提供多维的时空位置速度信息及连续导航能力。文中根据GPS定位原理、飞行动力学理论及仪表着陆系统信号体制,建立了以GPS作为基准系统的ILS飞行检验模型,为进一步的研究提供指导。     

多天线GPS和微机械惯导组合进行姿态确定

描述了一种多天线GPS和微机械惯导系统组合来进行姿态确定的系统.目的是设计和装配一种具有可靠的高精度姿态确定性能、而且具有高输出率、低耗、快速初始化、通过数据合成而具备坚固和冗余性的多天线GPS和MEMS惯导组合的系统.这个系统在一段时间内没有GPS测量信息也能提供姿态以及其他的导航信息.性能分析显示在200 Hz状态下姿态、位置、速度、加速度以及角速率可以达到0.08o/s、1.5 m、0.1 m/s、0.12 m/s2和0.1o/s.     

航弹SINS/GPS组合导航系统半实物仿真试验设计

针对某型远程航空弹药SINS/GPS组合导航系统的组成,设计了SINS/GPS组合导航的半实物仿真试验框架结构,探讨了在试验过程中多机时钟同步的问题,检验了捷联惯导系统导航计算机的解算性能和GPS信息的修正效果.试验结果表明,捷联惯导系统的算法正确,解算精度和解算时延满足控制系统的要求,GPS信息修正效果良好,SINS/GPS组合导航系统可以应用到航空弹药的制导与控制系统中.     

我国全球卫星导航信号设计研究

我国全球卫星导航信号应具有较大的信号带宽,其公开导航信号可与GPS,Galileo和GLONASS公开导航信号实现互操作,授权导航信号可与GPS和Galileo授权导航信号实现射频兼容共存,互不影响性能.设置导频信号以利于接收机捕获、跟踪,提高测量精度.全球卫星导航信号还应具有抗干扰,防欺骗能力.提出了一种关于我国全球卫星导航信号结构的方案.     

精确空投系统的导航方法研究

导航单元是空投系统能够精确的将物资投送到指定地点,并安全实施雀降的重要保证。在总结国外相关导航方案的基础,同时结合特殊条件下的空投要求,提出了将IMU/GPS同时辅以激光测距计的组合方式应用于空投系统,利用卡尔曼滤波技术,得到高精度的速度、位置信息,并通过Matlab仿真对导航结果进行了验证,结果证明满足了空投对导航精度的要求。     

现代无线通信中手机定位服务及应用探析

手机定位是通过无线通信系统和用户手机之间的信息传递来对用户提供精确的位置信息服务。手机定位服务在现代社会生活和生产中已经成为了一个新的热点,越来越多的无线通信商正在对其进行深入的研发。目前,使用较多的应用包括紧急事件的处理、导航和个性化信息服务等。     

什么是全球定位系统

不论在地球什么地方,只要你从口袋里拿出一只像手机大小的设备,就可以知道你现在所处的精确位置,以及此刻的精确时间。这并非神话,它就是全球定位系统(简称GPS)。1973年,美国国防部根据军事上的需要,开始部署了一种卫星无线电定位、导航与报时的系统,即GPS,并于1992年全部建成。GPS是由导航星座、地面台站和用户定位设备三部分组成。     

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