我校获1989年国家教委科技进步一等奖项目简介

2.2D,3D-SRAT-1型表面粗糙度自动测量分析仪 2D,3D-SRAT-1型表面粗糙度自动测量分析仪,是对制件表面微观形貌进行自动测量分析的精密、高效、多功能仪器。它特别适用于研究制件的表面粗糙度,表面加工质量以及表面间的摩擦、磨损、润滑特性和微变形等。该仪器由触针式传感器、精密X-Y双向电动工作台、APPLEⅡ或IBM-PC/XT微型计算机等构成。     

表面粗糙度“平均间距”的功率谱与回归分析

表面粗糙度是评定机器及仪器零件加工表面质量的重要技术指标。为了描述加工表面的粗糙度,各国采用了一系列评定粗糙度的参数,如R_a、R_2、R_t、R_p等。这些参数无疑对评定表面质量具有重要的价值。但这些参数都属微观几何轮廓垂直方向(波幅)的导出参数,也称一维粗糙度参数。它们忽略了加工表面不规则间距的信息,故不能描述     

磨削表面粗糙度的R_a值与H_(ck)值的试验研究

研究磨削表面粗糙度的形成机理从而揭示磨削表面光洁度诸量的相互关系,有助于全面掌握磨削表面粗糙度的变化规律,对于合理选择和制定表面光洁度的评定标准、简化测量方法和仪器结构,具有很大的实际意义。日本宇都宫大学进村武男对磨削表面粗糙度的算术平均偏差(R_a)与均方根偏差(H_(ck))的关系所作的理论分析结果表明:在各种不同磨削条件下,(?),而文     

基于白光干涉泥岩表面形貌试验研究

基于白光干涉法,以泥岩作为研究对象,对泥岩抛光表面形貌进行了测定,并采用统计学方法和分形几何方法对泥岩抛光表面形貌二维图像的粗糙度和分形维数进行了分析。结果表明:统计学方法得到的粗糙度参数反映的是泥岩抛光表面局部形貌,不具有唯一性;分形几何法得到的分形维数是岩石表面形貌的固有参数,不依赖于测定仪器的分辨率和取样长度,具有唯一性。     

DRNI型磁盘表面粗糙度非接触测量仪

本文论述了研制成的一种用于计算机硬盘盘片等超精密表面粗糙度非接触测量的智能化仪器;提出了基于外差干涉原理的平行双光束设计方案,简述了该测量仪结构、光学系统、驱动控制系统、光电转换系统、数据处理系统及精密定位系统;给出了表面粗糙度多刻线标准样板以及磁盘表面粗糙度的实测曲线.测试结果表明,该测量仪的示值误差优于3%,示值变动性小于±3%,可实现自动调焦自动测量.     

热处理对镍钛合金表面性能的影响

采用扫描电子显微镜（scanning electron microscope,SEM）、原子力显微镜（atomic force microscope,AFM）及电化学工作站等仪器,研究退火温度和时间对镍钛合金表面形貌、表面粗糙度以及耐腐蚀性能的影响。从SEM和AFM分析结果可知,在400~600℃退火温度内,随着退火温度升高,镍钛合金表面先产生小颗粒,最后这些小颗粒连接形成片状形貌,而表面粗糙度随着温度升高呈现增大趋势。改变退火时间时,表面形貌的变化趋势基本和处理温度相似,表面粗糙度在退火时间15 min时最小。用电化学工作站测试得到极化曲线,表明退火温度400℃和500℃时试样有较好的耐腐蚀性能。短时保温易获得良好的耐腐蚀性能。     

表面粗糙度的多参数测量—单片机智能化轮廓仪

本文介绍将单片机应用于表面粗糙度测量仪,该仪器首次试制成功,能进行国标提出的基本与附加参数的测量。经标准样板测试对比,满足设计要求。     

GC-1型光纤表面粗糙度测量仪研制成功

该仪器是一种在线(或离线)监测(或测量)精密加工表面粗糙度的装置,特别适于镜面加工条件,能对各种工程材料如金属、半导体材料、工业陶瓷和石材等加工表面微观几何     

高粘度导电浆料微滴喷射成形导电线路表面质量研究

为了评价高粘度浆料冲击喷射导电线路的成形质量,提出了线路水平轮廓精度与截面轮廓粗糙度指标。根据微滴融合特性建立了导电线路水平轮廓与截面轮廓质量模型,开展了不同单微滴直径和微滴间距的导电线路喷射成形实验。采用激光共聚焦显微镜扫描、MATLAB图像处理等手段,获取了成形线路的平均线宽、横向轮廓峰谷差以及纵向高度数据,计算了水平轮廓精度与截面轮廓粗糙度数值。结果表明：当微滴间距与单微滴直径的比值为(0,0.5]时,线路具有较小的水平轮廓波动;且该比值约为0.1时,线路同时具有最小的截面轮廓波动,并且截面轮廓质量随着比值的增大迅速下降。在高粘度浆料冲击喷射成形工艺中,针对不同的单微滴直径设置合理的微滴间距,可以有效改善线路表面形貌,提高导电线路喷射成形质量。     

2201型表面粗糙度检查仪微机化改造

在2201型表面粗糙度检查仪原有的电子设备基础上，提出从软、硬件两方面对表面粗糙度检查仪进行微机化改造，硬件电路主要以PIC16F877单片机为核心，可以完成仪器启动、数据采集和与微机串行连接，测量软件由4个模块组成，简要地描述了各个模块的功能，改造后的检查仪在实际应用中性能明显提高，证明该改造的实用性和可靠性。     

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