基于SOPC技术的服装压力测量系统中自定义IP设计

为了测量服装作用于人体的压力,设计了一款基于SOPC技术的自定义IP核.IP核主要由ADC控制逻辑和FIFO组成,分别由VHDL硬件描述语言和SOPC Builder软件提供的LPM模块实现.实验结果表明,该自定义IP核设计可行,能够实现对服装压力的连续采集.     

基于MicroBlaze的SOPC数字频率计设计

给出了一种测周的数字频率计的SOPC实现方法.该方法通过配置嵌入式软核MicroBlaze微处理器和封装AXI测频和测占空比IP核,将数据传输到软核处理器,完成系统的功能.数字频率计的参数测量由FPGA逻辑进行实现.计算、控制以及显示由MicroBlaze实现,两者完成对频率和占空比的测量.本系统在Digilent公司推出的Basys3板卡上进行了验证.通过测试,结果表明,本系统测量精确,稳定性好,方案简洁,成本较低.达到了预期的结果,验证了本方案的可行性.     

一种基于Qsys的双IP核无人机飞行控制系统设计与实现

该文分析研究了当前国内外较先进无人机飞行控制系统各模块的原理和关键技术,采用Verilog HDL语言设计完成了传感器驱动模块、导航控制模块、飞行控制模块和Avalon总线控制等模块,并用Altera公司最先进的SOPC集成开发工具Qsys构建了导航控制IP核和飞行控制IP核,最终设计实现了一个以导航和控制双IP核为核心的无人机飞行控制系统。基于Qsys工具开发的双IP核无人机飞行控制系统不仅指令处理速度快、占用硬件资源少,且具有系统集成度高、成本低、鲁棒性好、重构性强等优点,其性能优于传统微控制器和普通DSP芯片构建的无人机飞行控制系统,具有一定的应用价值和实际意义。     

μCLinux下主从式SOPC实现的嵌入式电测综合仪器

为对电子测量仪器进行大规模综合集成,在μCLinux下,以主从分布式FPGA／SOPC构建仪器数字平台,设计32位Nios-Ⅱ软核处理器的嵌入如CLinux系统,设计模拟电路,在μCLinux的控制下,有效地实现双通道100MHz示波器、32通道100MHz逻辑分析仪、30MHz任意信号发生器、2．7GHz频率计、常用数字IC故障测试仪、全自动LCR测量仪等仪器集成．详细介绍仪器集成的结构、各子仪器的FPGA／SOPC及μCLinux系统操作平台设计,实验效果好,实践表明该设计是行之有效的。     

等精度数字频率计几种设计方案的实验研究

研究了采用不同器件、不同设计方法实现等精度频率计的5种设计方案。依据等精度频率测量原理,分别针对51单片机、C8051F单片机、FPGA与单片机、FPGA及SOPC几种系统的等精度频率计设计方法、特点进行了详细的分析和实验教学研究。以及在此基础上扩展实现周期测量、占空比测量、脉宽测量功能的方法。意在引导学生拓展思路,使等精度数字频率计设计的实验教学实施具有启发性、开放性、探索性等特点。     

基于FPGA的液晶显示SOPC系统设计

使用Altrera公司提供的IP核来加快开发NiosII外设的速度,提高外设性能,并加上由个人编写的LCD控制器IP核,构建一个软硬件复合的液晶显示SOPC系统．使用FIFO模块作为缓冲解决跨时钟域的问题．使用2个SRAM作为双显存,可以有效避免显存的读写冲突．采用7寸模拟液晶大屏,TFT—LCD工艺制造,真彩256色,性价比高,非常适合应用于工控领域．使用NIOS处理器进行袜子缝头机界面开发,实现了清晰的动态显示．     

基于NiosⅡ软核处理器的通信信号源SOPC设计

介绍了SOPC及NiosII嵌入式软核处理器的概念和优势。详细论述了SOPC系统的架构、设计框图以及全数字信号发生器和调制器的原理和结构。给出了一个基于NiosII嵌入式软核处理器和大量自定义IPcore的多功能全数字通信信号源的SOPC设计实例,并给出了详细的测试结果。     

一种动态视频采集系统的调试与验证方法

以SOPC软核技术为设计基础,通过采用一种双DMA模块与系统IP互连,实现了一种动态视频采集系统;给出了调试结果和验证方法,优化了动态图像处理系统的性能,最后方案在硬件开发平台DE2上实现。     

SystemC在UART的IP软核设计中的应用

在IP软核的设计过程中,可以利用SystemC行为模型描述特点代替传统HDL语言,建立行为模型和验证平台.以一个通用异步收发器的IP核设计为例,详细讨论整个IP软核的设计流程,重点分析了行为模块和验证模块的设计.结果表明,SystemC对于提高代码效率和IP开发速度有着重要作用.     

基于FPGA的TFT-LCD显示驱动IP核设计

对简单IP核的设计方法进行研究,设计出满足LCD控制器的功能要求.在QuartusⅡ的组件SOPC Builder中定制用户IP,在QuartusⅡ中实现布局布线,并在NiosⅡ9.1 Software BuildTools for Eclipse完成-相应的软件工程,最后生成相应的下载文件,并下载到Terasic公司的DE0开发板上进行调试.调试结果证明该方法行之有效,完全可以取代传统的利用单片机来驱动液晶显示的方法.     

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.     

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.     

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.     

A computer generator for randomly layered structures

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

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.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-