聚酰亚胺薄膜的热扩散特性研究

研究一种可见光/红外转换薄膜. 给出转换薄膜热扩散的理论公式,并进行求解,得出薄膜的温度扩散分布曲线. 对于3种不同厚度的薄膜热扩散距离的仿真结果分别为113.0,113.4,114.2 μm. 制备了不同厚度的聚酰亚胺薄膜并设计了实验,热扩散距离的实验结果分别为119.6,121.6,122.8 μm. 实验结果表明,该理论模型是基本正确的. 基于这种薄膜制备的可见光/红外图像转换器,可用于对各种红外成像仪器进行性能检测和实验.      

光学微扫描显微热成像系统超分辨力图像处理方法研究

为提高已研制光学微扫描显微热成像系统的空间分辨力,基于改进的频域图像配准技术和凸集投影超分辨力算法,提出了显微热成像系统光学微扫描超分辨力图像处理方法。给出了该方法的原理及步骤,采用不同重构方法行了仿真研究,给出了评价参数和结论。利用光学微扫描显微热成像系统采集低分辨力显微热图像序列进行了超分辨力处理实验,实验结果表明本文提出方法的有效性,光学微扫描显微热成像系统的空间分辨力得到提高从而可满足需要高分辨力显微热分析的场合。该方法还可以应用于其它不可控光学微扫描成像系统中,具有广泛的应用前景。     

一种新型的D／A转换器

多值逻辑是计算机科学的一个新分支．本文首次将多值逻辑的概念应用于Ｄ／Ａ转换器，提出了通用多值Ｔ型电阻解码网络电路形式与计算方法。并由此设计出一种新型的多值Ｄ／Ａ转换器。分析和实验证明：多值Ｄ／Ａ转换器在灵敏度、转换精度方面优于二值ＴＴＬＤ／Ａ转换器。     

直接数字频率合成及其杂散分析

直接数字频率合成采用全数字技术，具有分辨力高、频率转换快和相位噪声低等优点。该文介绍了直接数字频率合成原理，分析了在没有相位截断和Ｄ／Ａ转换器理想情况下，正弦波输出及脉冲输出中的杂散分量．     

利用SVGA实现红外全灰度图像的实时显示

论述了一种用于红外测试系统的对SVGA进行高级编程的方法，通过对显示适配器底层功能的调用成功地实现了对全灰度数字红外图像的实时显示，可以替代红外成像测试系统中传统的录像机记录模式．给出了若干关键的程序函数和编程技巧，并给出了实验结果．研究表明，通过高效率编程直接把图像数据传输和显示，具有硬件简单、无信号损失、检索方便等优点．     

基于红外图像处理的埋地石油管道自动探测技术

埋地石油管道的辅助巡线以及对偷油支管的快速定位与排查是目前油田亟待解决的问题．为此，根据输油管道加温后辐射红外能量的特点，提出了应用红外热成像技术探测埋地输油管道的方法．介绍了基于非制冷红外焦平面阵列的，具有便携、实时成像特点的红外管道探测仪的硬件设计；在对原始红外图像进行去噪和增强的基础上，采用基于最大类内距离比准则的递归带通分割法对输油管道的红外图像进行自动阈值分割，并结合Freeman直线链码方法对细化后的图像进行骨架跟踪处理，提取管道主干，标记管道走向并定位偷油支管分支．实验证明，本算法自适应性好，执行效率高，管道定位准确，实现了埋地输油管道的自动检测．     

基于VC和OpenGL的三维图形的开发

介绍了利用VC 6．0和OpenGL进行三维图形开发的基本步骤、方法。并以红外成像系统所产生的光斑图像为原始数据．详细介绍了如何利用OpenGL强大的图形、图像及动画处理功能，开发出成像系统焦平面上的光斑图像的三维能量分布图．并绘制出任意方向的截面图。开发过程中利用图像采集卡采集的每个点的行、列和光强(灰度)作为三维图形的x,y，z坐标，采用绘制网格图的形式绘制三维图形。实验结果表明：利用VC 6．0和OpenGL作为开发工具来进行三维图形的开发非常方便．有效。     

交叉增益型全光波长转换器性能的实验研究

对基于半导体光放大器的交叉增益型波长转换器的性能进行了实验研究．给出了波长转换的实验结果,研究了放大器增益特性、泵浦光功率、探测光功率以及放大器注入电流对转换效率、消光比特性和噪声特性的影响,并对实验结果作了分析和讨论,对进一步的波长转换实验及结构参数的优化有指导作用．     

日光图像至夜间点光源照明图像的转换

分别从日光和夜间点光源照明模型出发，研究了目标和景物在此照明模型下的成像性质，分析了传输介质对照明和成像光束的衰减作用，得出了光学成像系统像面照度的计算公式．在此基础上对目光图像转换为夜间点光源照明下的图像进行了研究，分析了在转换中可能产生误差的各种原因，并给出了一些转换结果     

压电式电/气转换装置实验研究

介绍了一种压电式电／气转换装置的结构、工作原理．实验研究证明，以压电复合圆盘作为执行器的转换装置响应快、反应灵敏、性能稳定，在较低电压下很容易实现输出气压0．02～0．1MPa的工业现场要求，为新型压电结构电／气转换器的研制打下了基础．     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.