三万兆移动硬盘问世

经过长期的研究与开发,爱国者推出了容量为5千兆至3万兆的USB移动存储王。它可以把相当于近40张光盘的图象、数据资料放入只有手机大小的爱国者USB移动存储王中。该产品轻巧美观、随意携带、即插即用,只需将连线插到主机的USB接口上,就可以进行数据的存储、移动共享等操作。此外,该产品采用先进的硅氧盘片,既可极大地提高数据在移动使用时的传输速率,又不受温差和磁场的影响,确保移动环境中数据的稳定。另外,它具有极强的兼容性,可适用于任何品牌的装备USB接口的PC机、苹果机和笔记本电脑。     

基于嵌入式和DS18B20的温度采集系统

利用MCU、温度传感器、Flash芯片和USB控制芯片设计一个基于嵌入式USBX机的温度采集系统．该系统能将采集到的温度数据存储在自己的Flash芯片中,能将数据通过USB接口存储到USB移动存储设备中,同时还能够作为PC机的一个外设,通过USB接口连接到PC机上,直接在PC软件上进行温度数据的分析和处理．重点论述了温度采集系统的设计与实现．     

USB接口信息电话机的数据采集与处理

用摩托罗拉公司的FSK解码芯片MC14LC5447完成对来电显示数据的解码,用AT89C2051单片机系统进行数据采集处理和数据存储,通过DLL动态链接库控制USB203(8位并行输入USB传输模块),完成对存储数据的传输,并对采集的数据进行分析处理。使用改进后的软件接口进行数据传输,实现了可用于VC、VB和DELPHI语言编程环境的接口函数。     

U盘存储与转存模块的设计与实现

本文主要介绍了基于ARM和GPS的数据采集记录仪中的U盘存储与转存模块的设计与实现.该数据采集记录仪以32位ARM7微处理器LPC2220为硬件平台,以uC/OSII嵌入式实时操作系统为软件环境,实现了对复杂工业信号的采集、记录以及对此过程的控制.该模块既能对数据采集模块采集的数据进行直接存储,也能对flash存储模块中的数据进行转存;同时利用GPS全球定位系统技术实现多仪器间的精确同步.该数据采集记录仪具有良好的人机交互性、稳定性、高效性.     

嵌入式USB主机系统

USB是一种得到了广泛应用的新型总线,本文描述了一种基于嵌入式USB主机的数据存取系统,该系统利用嵌入式USB主机控制器来实现数据存储,使控制系统、仪器仪表可以脱离PC独立运行和将数据存储在移动USB存储设备中,也使嵌入式系统的大容量数据存储成为了现实.     

嵌入式桥式起重机防撞器的USB通信

桥式起重机防撞器时刻监测着相邻起重机之间的距离,将距离数据记录并存储起来。为了加强桥式起重机防撞器的管理和统计能力,监控人员需对此数据进行定期分析。在此,利用USB通信,将防撞器上记录的历史数据转存至U盘,然后用计算机对数据进行分析。USB功能的实现依赖于CH375模块,利用串口方式实现U盘的读写。此设计进一步完善了记录仪对起重机运行状况的管理和统计能力。     

一种USB高速数据采集系统的LabVIEW程序设计

在LabVIEW虚拟平台下设计了一种用USB接口实现的高速数据采集系统。提出了自动分文件存储的方法解决了使用Excel文件存储数据产生的大文件问题。提出了一次最多读取两个文件依次读取的方法,解决了用波形显示多个文件的大量数据时占用大量内存甚至导致无法显示的问题。实验证明文中所用方法效果明显。该系统支持8条通道32位数据的同时采集、存储、波形回放,系统界面简洁、操作简单、可添加模块以拓展功能。     

温室CO2浓度数据记录仪的设计与实现

为了实现温室CO2浓度的自动测量和存储,设计了一种基于单片机的CO2浓度数据记录仪.记录仪采用STC12C5A32AD单片机作为微处理器,以时钟模块、传感器模块、显示模块、存储模块,通讯模块等部分分别完成定时、浓度测量、数据显示、存储及数据输出功能.在软件设计上,通过选用数字滤波方法提高传感器的测量精度,固定点测量结果表明其标准差低于4%.实验结果表明,测量仪能够完成温室CO2浓度的自动测量和存储,并可任意调整测量的间隔时间,提高了温室环境因子研究中浓度测量工作的自动化程度.     

汽车行驶记录仪中USB Host的研究及应用

本文介绍了基于CPU和SL811HST接口芯片在汽车行驶记录仪中实现USB HOST功能的设计方案,对USB HOST中的关键技术USB设备枚举、FAT32文件系统的实现做了较详细的说明.     

基于CAN总线和嵌入式USB主机的智能溶解氧传感器系统的设计

为了将水产养殖中的溶解氧进行采集并可靠地远传和存储,设计了基于CAN总线和嵌入式USB主机的智能溶解氧传感器系统。将CAN总线应用到水产养殖的现场环境中,利用CAN总线的实时性、可靠性和灵活性,能够实时显示水环境中的溶解氧含量,并可以与上位机进行通信。嵌入式USB主机可以脱离PC独立运行,将采集的数据保存到移动USB存储设备中,扩展了系统的存储容量。该系统为溶解氧浓度的控制提供了可靠的数据,具有良好的应用前景。     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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