基于图像熵的快速Chan-Vese模型分割算法

提出了基于图像熵的快速Chan-Vese模型分割算法.该算法利用实时图像熵自适应计算模型能量函数中的拟合参数以提高分割速度,并通过检测熵在曲线形变过程中的变化来判定曲线演化的稳定态.实验表明.针对含噪严重、目标模糊且边缘不连续的红外图像目标检测,所提出的分割算法可以取得精确、高效的分割结果.     

基于噪声图像2D直方图的快速分割方法

提出了一个基于2D直方图的有效的图像分割算法·该算法运用了迭代优化方式,使一个加权平方和目标函数最小化,从而在灰度直方图上获得最优的图像分割效果·从基于2D直方图的图像分割结果上看,该算法同Otsu算法、熵算法具有非常相近的分割结果,而且该算法占有时间上的优势充分体现出来·因此,在要求实时性较高的系统中,例如,实时识别、实时跟踪和监控等系统,新算法具有更大的应用价值·     

采用仿射迭代最近点的晶圆分割方法

针对依赖硬件设施的晶圆分割方法存在生产成本高、工艺复杂且分割效果不稳定的问题,提出以仿射迭代最近点(ICP)算法为核心的基于图像形状配准思想的晶圆分割方法。该方法采用Canny算子提取图像边缘,建立晶圆模板图像与目标图像的特征点集;对目标图像的边缘图像进行基于Hough的直线检测,得到粗略的晶圆矩形边框信息;以矩形左上角的点坐标作为匹配搜索区域的初始值进行基于仿射ICP算法的精确配准,通过晶圆产品图像与模板图像的特征匹配,实现晶圆的快速、准确分割。理论分析及实验结果表明:该方法计算复杂度较低,单独样本分割时间约为0.9s,样本分割精度明显高于其他算法,满足自动化生产线的实时在线检测需求。     

基于OLS算子和小波分解的分水岭图像分割算法

针对分水岭图像分割算法导致目标图像被过分割或者欠分割的不足,提出了一种基于OLS算子和小波分解的改进分水岭算法。首先,利用OLS算子和小波分解构造多尺度的边缘保持方法。然后,通过增加或减少层次,在保证平滑性和细节性基础上选择最佳新图像。最后,基于分水岭分割算法对选择的图像进行分割。试验结果表明,该方法能够更准确地分割图像,使用的技术比其他算法分割更加精确,对于复杂图像,其分割精度维持在0.80以上。     

基于爆破矿石图像分割优化算法的大块率统计方法

矿石图像分割效果受光照条件、目标密集性及边缘对比度低等因素制约，致使大块率统计精度偏低.为此以鞍千矿爆破矿石图像为数据源，首先利用双边滤波算法去除特征增强后的图像噪声，然后分别采用自适应阈值算法和整体嵌套边缘检测(holistically-nested edge detection, HED)算法初步分割矿石图像，再利用形态学和去除连通域算法去除因矿石表面纹理形成的分割孔洞，进一步融合两种分割结果，引入基于距离运算的分水岭算法消除矿石图像欠分割现象，最终实现矿石图像的优化分割.研究结果表明，该方法可有效提高爆破矿石图像分割准确性，实现露天矿爆破大块率精确统计，为爆破效果智能评价提供技术支持.     

针对车辆与行人检测的感兴趣区域自适应分割算法

在基于图像的车辆与行人检测中,针对固定比例/区域的感兴趣区域(region of interest, ROI)图像分割适应性低的问题,提出基于消失点和车辆高度的ROI自适应分割算法。首先,利用车道消失点得出道路位置,避免分割区域浪费;其次,综合车辆实际高度和检测距离计算图像上车辆高度,定位ROI边界,减少车辆及行人目标的不完整分割;最后,循环利用当前帧的车道消失点及其推导的实时俯仰角更新下一帧ROI,实时适应不断变化的路面坡度及车身俯仰姿态。实验表明,该算法计算简单,适应性强,满足不同情况下快速精确的ROI分割要求,提高后续目标检测的实时性和准确性。     

针对车辆与行人检测的ROI自适应分割算法

在基于图像的车辆与行人检测中,针对固定比例/区域的感兴趣区域(Region of Interest, ROI)图像分割适应性低之问题,提出基于消失点和车辆高度的ROI自适应分割算法：首先,利用车道消失点得出道路位置,避免分割区域浪费;其次,综合车辆实际高度和检测距离计算图像上车辆高度,定位ROI边界,减少车辆及行人目标的不完整分割;最后,循环利用当前帧的车道消失点及其推导的实时俯仰角更新下一帧ROI,实时适应不断变化的路面坡度及车身俯仰姿态。实验表明,该算法计算简单,适应性强,满足不同情况下快速精确的ROI分割要求,提高后续目标检测的实时性和准确性。     

基于遗传算法的阈值图像分割研究

图像阈值分割技术在图像分析和图像识别中具有重要的意义，最大熵方法具有很多优点，但同时也存在弱点：需要大量的运算时间，因此需要引入优化算法，文中将遗传算法用于最大熵阈值的图像分割方法中，提出了一种基于遗传算法的最大熵阈值图像分割方法。仿真实验表明，该方法可以有效地提高最大熵图像分割的计算速度，提高图像处理的实时性。     

改进灰度共生矩阵的指纹图像分割算法

针对灰度共生矩阵对指纹图像分割过程中人工选取阈值不精确、繁琐等缺点,提出了一种采用自适应阈值分割的灰度共生矩阵的指纹图像分割算法。首先,用整幅指纹图像的对比度方差值的均值Mv作阈值对图像进行初分割;然后,不断调整Mv,通过试验验证当指纹区域对比度方差值的均值Pv与Mv的比值在一个特定的区间(即Pv/Mv∈[1.5,2])时,才能获得最好的分割效果,由此获得灰度共生矩阵的自适应分割阈值Mv,从而精确地分割出指纹图像的有效区域。试验结果表明,相比于已有的分割算法,该算法在分割错误率和耗时方面均较优,并且分割更准确。     

区域生长型分水岭算法及其在图像序列分割中的应用

针对物体基视频编码中的图像分割,提出了一种区域生长的分水岭算法,它直接对要分割的图像而不是其形态梯度信号进行分割,克服了传统形态分割方法使用形态梯度信号而导致轮廓信息丢失的缺点。此外,在具体实现算法时,采用了一种基于分级队列结构进行图像扫描的巧妙方法,大大提高了算法的效率。模拟结果表明,该算法能有效地分割运动物体,能较精确地定位运动物体的边缘。     

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.