基于势能平衡的图像骨架抽取算法

基于骨架的基本特征和势能的概念，提出了一种基于势能平衡方式的二值图像骨架抽取算法．将抽取对象的边缘点作为零势能的等势点，计算出处于势能平衡点上的基本骨架点，并据此通过向势能小处延伸的方式构建出骨架，还解决了由于各点周围参考零势能点数量不同而带来的各点势能值间难以比较的问题。通过计算机模拟显示，本算法对于边界噪声影响不太敏感，且在端点处的畸变比最大圆盘方式小。     

B样条曲线曲面的一种光顺算法

文章给出了一种新的B样条曲线曲面光顺算法,该算法以型值点的变动量为未知量,以型值点变动量的变动范围为约束条件,给出能量函数;通过遗传算法对能量函数最小化求解,直接得到光顺后的新的型值点;最后给出实例,表明该B样条曲线曲面光顺算法是一种有效的光顺算法。     

均匀三次B样条曲面顶点反求的整体算法

本文推导出一个由均匀三次B样条曲面上型值点反求网格顶点的整体算法公式,明显地展示出型值点与网格顶点间的函数关系.如果给定曲面上m×n个型值点,再按边界条件给最外层网格顶点赋值,则其余m×n个网格顶点全部可由该式解出.计算过程很简单.克服内存不足的几种措施也在此作了介绍.     

B 样条曲面在防毒面具中的应用

本文选用双三次均匀基 B 样条曲面为数学漠型,着重讨论了 B 样条曲面在不同边界条件下顶点反算和曲面拼合问题.根据所推导的算法特点对面具口罩芯模和矿用面罩密合框进行划分,采样型值点,构造出其定量化模型,在计算机屏幕上显示其三维图形(透视图),取得较满意的效果.     

计算机辅助几何设计凸轮型线的探讨

本文论述对凸轮型线进行计算机辅助几何设计。用等距曲线设计凸轮型线,用B样条曲线的计算方法拟合凸轮型线。提出了四点循环编程方法,在APPLEⅡ微型计算机上进行了分析计算,同时在DMP—29型绘图仪上画出图形。结果表明,该方法计算精度高,算法简单,修改设计参数灵活方便,易于生产实际中应用。     

一种光顺样条的快速生成算法

提出了一种光顺样条的快速生成算法，得到通过型值点的曲线，具有运行速度快及光顺性好的特点，且能保证精度，算法的有效性由实验得到了证实。     

SUSAN角点检测算法改进

提出了一种改进的角点检测算法．本着好的算法不依赖于人为干涉的思想，在SUSAN算子基础上．通过对图像灰度值和对比度分析，提出灰度阈值t和比较函数C的快速自适应选取．针对SUSAN算法中对某些特殊型角点检测会失败的情况，构造一种针对SUSAN圆形模饭的二圆环模板，对一些与边缘点难以区分的角点进行检测．试验表明，改进的算法近一步提高了检测的准确性．     

基于物流配送系统的运输路径分析及应用

物流配送系统中运输路径的优化研究对于节约物流成本、提高物流效率有着重要的意义。经典Dijkstra算法在求解最短网络中两点间最短路径时，需要计算大量与最短路径无关的结点间的路径。占用了大量计算机的内存。本文在此基础上提出了改进算法，该算法避免使用含有大量无穷值的关联矩阵，节省了内存，使之更适合处理带有拐向限制和包含大量结点信息的最短路径问题。     

浮动连杆上浮动点轨迹的 CAD 算法的改进

针对文献［１］中的六杆机构中浮动连杆上浮动点轨迹的计算机辅助设计方法较复杂、程序运行效率较低等缺点。在对文献［１］重新分析的基础上，提出了一种方法简单、程序运行效率较高的计算机辅助设计算法。并给出了改进方法的算法流程图及Ｃ语言实现的源程序     

基于内点保留的二值图像细化算法

提出一种基于内点保留的并行细化算法，与一般基于边缘点去除的细化算法比较，它具有运算速度快，程序简单，便于硬件实现，能够完整地保存图像的拓朴结构，所获得的骨架对称性好等优点。在ＩＩＳ图像处理系统上进行了初步实验，结果表明，所提出的二值图象细化方法为解决二值图像细化问题开辟了一条新途径。     

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.     

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.     

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.     

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.     

The Analects and the Moment in Peking——The influence of a Confucian education system on the personality formation,the way of thinking and the fate of the main characters

0.Preface China has long been boasting of its colorful and immense culture which comprises of Taoism,Confucianism and Buddhism.The interwoven influence among the religions on Chinese way of thinking,on the nation＇s behavior in their social life throughout the long history is beyond list.