用于神经保护治疗仪的LCD脑电显示系统的研制

叙述了一种采用AT89C51单片机和点阵式LCD显示器技术而设计的神经保护治疗仪的LCD脑电显示系统,它能提供准确、高清晰度显示的脑电波形和治疗控制菜单.给出了AT89C51与LCD的接口电路、汉字以及脑电波形显示软件编程,该显示系统具有体积小、成本低、操作简单等特点.     

基于CPLD的数字存储示波器的设计

本文主要介绍一种以可编程逻辑器件为主要控制核心,利用单片机实现控制显示和输入的数字存储示波器。系统中,根据模数转换器特征在CPLD内设计了高速信号采集模块和数据缓存功能的接口单元。利用单片机简单易行的处理能力实现了液晶显示屏(LCD)显示控制和键盘的输入控制。CPLD和单片机的结合,使得该系统利用CPLD快速采集输入信号并利用单片机控制慢速的LCD显示。     

基于DSP+MCU的小型捷联惯性导航计算机系统

结合现代导航技术发展的特点,设计了一种基于DSP的捷联惯性导航计算机.该导航计算机采用DSP 单片机的双CPU体系结构,DSP主要负责数据计算,而单片机主要负责数据采集与系统级的控制,同时CPLD完成译码和控制.通过DSP的HPI口来实现单片机与DSP的数据交换.给出了系统的硬件结构框图和程序设计流程图,利用本方案,对于实现军事和工程领域中导航系统微小型化、降低系统成本和体积具有重要意义.     

基于单片机的点阵式汉字显示系统设计

本系统针对只显示文字、图形符号的文字LED显示屏系统进行研究,通过对显示屏的远程控制,随时可以更新显示内容。PC机编辑显示内容,由汉字多点阵字模提取子程序生成汉字点阵,以串行方式发送字模信息和控制信息,AT89S51单片机接收来自上位机的数据,经转码子程序将显示内容转换为合适的形式输出给LED显示屏,实现动态循环显示。     

基于单片机的简易频谱分析系统的设计

目的设计一种简易的频谱分析系统,实现系统的硬件和软件设计。方法该系统以C8051F020单片机作为核心处理器,利用单片机内部的500ksps、8位逐次逼近式转换器进行A/D转换,使用FFT技术对信号频域进行分析,并将频谱分析的结果通过LCD屏实时显示并上传至上位机。结果与结论该系统具有较高的可靠性和较强的实时性,可以实现信号频谱的显示和信号波形的显示,并能实现数据的快速测量和传输。     

LED显示屏控制系统的软件设计

LED显示系统是根据点阵数据来显示汉字、字符及图像信息的。该设计利用字库将输入文本的字模提取出来,转换为适用于单片机的格式,并可将其保存为.txt文件或利用VB的Ac-tiveX控件通过串口与单片机进行通信,具体的通信参数可以动态设置,从而实现对LED显示屏的控制作用。     

测量气体绝热指数的智能仪器研制

设计了一种用单片机控制的新型测量气体绝热指数智能实验仪.该智能仪器的硬件核心部分是MCS51单片机,外围电路包括传感器、A/D转换器、键盘和LCD显示模块等四部分.传感器将压力、温度转换成电学信号,A/D转换器对这些信号进行数字化转换,单片机对采集的压力和温度数据进行简单处理,再送入具有图形和文字显示功能的LCD显示模块,实现对压力和温度的实时显示.键盘电路完成实验人员对仪器的设置和操作.单片机程序设计使用模块化设计方法,便于以后对实验装置的进一步完善.     

点阵式液晶显示器汉字显示程序设计

详细地介绍了点阵式LCD汉字显示的程序设计思路,并给出点阵式图形显示器ACM12864D基于单片机PIC16C65的汉字显示程序,同时还在实践的基础上给出获取汉字点阵数据的一种简单方法.该程序已成功地应用于研制的通讯检测仪器中,具有一定的实用价值.     

一种智能无线数据采集系统的设计与实现

提出了一种基于PC机控制的智能无线采集系统设计的新方法.利用A/D转换芯片采集数据,选用编解码芯片实现对数据的无线发送和接收,利用串口实现PC机与接收端单片机之间的通信,可实现对采集点进行单点循环或多点循环采集,并显示与保存采集到的数据.     

基于STC12C2052的直流电机调速及控制系统的设计与应用

介绍了以基于STC12C2052单片机为核心的直流电机调速系统,该系统采用四个按钮调节电机速度,用光电开关测速模块测量电机速度,用74HC595将串行数据转换为并行数据并驱动LCD1602显示电机速度,以及用蜂鸣器进行超速堵转报警,从而实现对电机高速、高精、高效控制.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to