基于像散的并行全场三维检测新方法

基于像散原理,提出了一种全场并行三维检测新方法,该检测方法利用微透镜阵列产生的二维点光源阵列来实现并行像散光路,实现了对测量表面的全场同步检测.利用像散特性曲线中的线性关系,实现在较大采样间距下获得较高的轴向分辨率.介绍了并行全场三维检测的测量原理,对像散光学系统的性能参数和影响因素进行了分析和讨论,并进行了可行性实验.实验结果中像散特性与理论分析是基本吻合的,表明像散法在并行三维检测中可以应用.     

基于差动共焦的并行三维形貌检测系统的研究

为提高并行共焦检测系统的测量精度和分辨率，基于差动共焦原理，提出了一种全场非扫描三维形貌检测系统．该检测系统利用微透镜阵列产生的二维点光源阵列来实现并行全场共焦探测；反射光路采用差动设计，使用两个CCD同步测量离焦光斑强度信号。通过使用光斑光强差动算法，可以有效抑制光源的噪声和漂移对测量结果的影响；利用差动共焦特性曲线中的线性关系，实现在较大采样间距下获得较高的轴向分辨率。实验证明该检测系统是可行的。     

高功率激光二极管线性阵列光束特性的研究

该文对激光二极管线性阵列的光束特性进行了研究．基于二阶矩定义，对激光二极管线性阵列光束的光束质量(M＾2因子)、束宽、远场发散角和内禀像散不变量等光束特征参数作了理论推导和分析．对激光二极管线性阵列光束的近场光强分布的理论模拟与实验结果相符．     

利用共焦成像原理实现微米级的三维轮廓测量

以普通光学成像透镜取代显微物镜,以针孔阵列(500×500)取代单针孔,实现了全场并行共焦测量.在数据处理上,采用了内插值三维重构算法,以及二次曲面拟合的系统误差校正算法,可以在较大的采样间距下获取较高的测量精度.实验表明,系统的最大横向测量范围为5mm×5mm,横向测量精度约为13μm,纵向测量精度约为5μm,因此可大大提高测量视场及测量速度.     

一种提高并行共焦显微测量重复性精度的方法

并行共焦测量是利用微透镜和小孔列阵产生一个二维点光源阵列,实现对物面上一个二维阵列物点的同步共焦测量。传统的共焦显微测量系统对三维形貌进行重构,是通过搜索各个轴向扫描图像中光斑光强极值点的位置来获取三维轮廓,轴向扫描间距的选取对测量精度和重复性的影响很大。文章介绍了一种新的数据处理方法,其先对各物点的轴向光强采样值进行线性拟合,再由拟合得到的直线确定最大光强所对应的轴截面位置,这样可以在较大的轴向采样间距下获得较高精度的三维轮廓信息。实验结果表明,采用这种数据处理方法,测量精度和重复性精度均有所提高。     

环型空间阵列扭矩传感器读数头测量原理分析

利用球对称特性和交流电磁感应的环型空间阵列扭矩测量原理,讨论了一种适合于极端环境下测量扭矩的环型空间阵列扭矩传感器读数头的工作原理。针对测量扭矩时遇到的难题,设计了读数头电路,并对其进行了仿真实验,获得较为满意的结果。     

高通量、多组分表面等离子体谐振生化分析系统研究

基于表面等离子体谐振(surface plasmon resonance,SPR)原理,利用图像分析技术和自动进样技术,研制成一种新型高通量、多组分图像SPR生化分析系统;对微阵列SPR敏感芯片进行动态检测,实现高通量、多参数、多组分快速检测和定量分析．以15单元的阵列芯片为例,对兔IgG和人IgG分别与羊抗兔IgG和羊抗人IgG的免疫结合反应进行了实验检测．结果表明,该分析系统可进行实时高通量、多参数检测,具有灵敏度高、免标记等优点,而且阵列芯片中所设置的参比单元可以消除溶液本体折射率和温度变化的影响,提高了测量精度和准确性;另外芯片可以再生重复使用,降低了测试成本．     

基于机器微视觉的微结构平面运动测试技术

为了对MEMS的微结构平面运动特性参数进行提取和分析，基于机器微视觉构建MEMS动态测试系统，提出模糊图像合成技术．在连续光照明下获取微结构运动图像，利用光学检测方法增强模糊特征带，引入亚像素定位技术提取特征结构边缘，最终获得微结构的平面运动特性参数．实验结果表明，该系统测量误差小于100nm，具有较好的测量重复性精度，与现有系统相比，该系统测量原理简单，实现方便，且能满足微结构的测试需求．     

热交换法测量皮下血流量的实验研究

利用热交换法进行皮下静脉微血管血流量测量的实验研究，这种方法在进行测量时可以。不损伤皮肤．叙述了热交换法的测量原理和测量系统的设计，测热探头的构造和工作原理以及传感元件的选择，并对误差放大器和温度刻度线性化电路以及相关关键参数的选择进行了重点说明，最后给出了测量系统的运行结果，据以分析系统的跟踪特性并进行系统优化讨论．     

自动网格形状测试技术

采用网格投影和亚象素技术，成功地进行了自动网格法的三维形状自动测量．提出了一种新的网格点分割法——全场阈值函数法，加快了分割速度，提高了分割质量．并且还提出了一种利用网格相邻位置关系进行搜索编码的新方法，解决了大变形或含空缺点网格点阵的自动编码和匹配问题．通过对标准斜面和圆柱面进行的实测研究，验证了自动网格形状测试法可以快速自动地进行高精度测量．文中给出了部分实验结果     

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.     

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.     

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.     

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.     

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.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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.