PTCR耐电压自动测试系统

根据PTCR生产中耐电压测试要求，研制了计算机控制的PTCR耐电压自动测试系统，采用PC机、串行通信接口、并行打印接口、智能化仪表及各种外围接口电路，实现了PTCR耐电压性能的在线测试，系统具有耐电压测试、限值测量、自动分选等多种功能，提高了测试效率。     

某大气数据计算机自动测试系统的设计

自动测试、通用化是航空测试仪器研制的发展趋势，采用模拟化，数字化，自动测试技术，针对大气数据计算机自动测试系统信号给定电路，信号测试电路，接口电路以及测试系统自检等电路进行了设计，从工程实践出发，成功的解决了自动检测和抗干扰问题，该自动测试系统在航修厂得到了推广使用。     

用Socket实现“112”系统自动处理接口

介绍了“１１２”系统的结构及用Ｓｏｃｋｅｔ处理自动受理、自动测试接口的实现方法。     

高温超导桥结特性自动测试研究

本文报告了自行研制的高温超导桥结特性自动测试系统，该系统包括软件控制及相关电路两部分。由系统软件控制实现自动测量、自动存储、显示及打印等多种功能。文章最后给出部分测试结果，优于常规系统的测试精度．     

气敏元件测试电路的研究

提出了新的测试电路，配合函数记录仪，实现了敏感元件的自动加热，多功能敏感特性的自动测试与记录     

以逻辑分析仪为主的自动测试系统

智能逻辑分析仪ＳｏｎｙＴｅｋｔｒｏｎｉｘ３１８带有标准ＲＳ－２３２接口，具有完备的远控指令集，本文以逻辑定时分析，实现最佳采样频率的自动选择为例，介绍该逻辑分析仪的可程控特性及经它为主组建的自动测试系统。     

自动控制仿真实验系统的设计与实现

该文探讨了基于Visual C＋＋与Matlab接口的自动控制仿真实验系统的实现问题,分析了Visual C＋＋与Matlab接口实现的多种途径及特点,并就系统软件设计进行初步研究,指出了开发过程中所遇到的问题。     

基于GPIB接口数据采集系统的设计

提出了一种基于CPIB接口的数据采集系统的设计和实现方案,并详细介绍了该数据采集系统的硬件结构、接口电路和软件设计.GPIB接口应用到数据采集系统中,提高了数据采集系统的可程控性,增强了系统的抗干扰能力和数据传输的可靠性.同时,基于GPIB接口的数据采集系统也大大降低组建自动测试系统的成本,提高了测试人员的工作效率.     

大阵列应变计电阻精密测试系统设计与分析

为提高电阻式应变计测试效率,研制了一套大阵列应变计测试系统。基于ADG884模拟开关,设计了多路测量电路切换阵列。在工控机架构下,基于LabVIEW环境,开发了控制程序。利用多功能数据输入输出卡和232接口实现了对测量电路阵列的自动切换和高精度数字多用表的自动测试任务。在对各个测试端进行短接的条件下,对测试阵列切换电路的随机电阻误差进行了测试分析,测试结果显示,切换电路的最大随机偏差在±0.002 7Ω内,完全满足产品分类测试要求。     

基于TLl6C550C实现TMS320C6711的异步串行通信

为解决TMS320C67ll在通信接口控制能力方面存在的缺陷，提出了一种基于TLl6C1550C实现TMS320C67ll的异步串行通信的新方案。该方案采用一片可编程的自动流量控制专用串行异步接口芯片(TLl6C550C)来扩展TMS320C67ll的串行异步接口，结合简单的寄存器配置程序来实现TMS320C67ll的高速异步串行通信。同时，给出应用电路实例及进一步改进的方法。     

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.     

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