关于基于近似次梯度的非光滑优化束方法的对偶问题的研究

利用目标函数值和近似次梯度,构建了非光滑无约束优化问题目标函数的一个下近似模型,通过对该近似模型取极小寻找下一个可能使目标函数值下降的试探点.利用Lagrange函数写出了原近似问题的对偶问题,揭示了原近似问题的最优解与对偶问题最优解之间的关系,并进一步分析了相应的近似次梯度的某种凸组合与目标函数在当前迭代点的次微分以及目标函数的近似模型在当前迭代点的近似次微分之间的所属关系.所得结果为原近似问题的求解开辟了新思路,也使整个外层束方法的执行变得简单易行.     

回调函数的C++封装

回调函数是应用程序参与操作系统运行的一个非常重要的接口，在DirectX Play开发过程中，经常需要使用到回调函数，直接使用回调函数显得复杂麻烦。介绍了用C 完成回调函数的封装的方法，使回调函数的处理变得容易。     

基于动态规划法的成品油管道管径优选

成品油管道工艺方案优化设计的目标是使所设计的管道在其计算期内经济效益最佳，由于影响工艺方案的因素较多，设计人员通常期望能够通过优化的方法获得多个预选方案，然后就一些影响因素和工程实际情况进行具体分析后，再确定最优工艺方案。以成品油管道系统计算期内总费用现值最小为目标函数，建立了管径优选数学模型，并应用动态规划法进行了求解。在求解时，把泵站投资表示为水力摩阻的函数，使得求解变得简单方便。具体的实例结果表明，同其他方法相比，应用动态规划法能够同时求解出最优和次优工艺方案，所得结果可以用于多方案比选。     

带有模糊数的多优先级多目标优化

针对目标函数中带有模糊数的多优先级多目标优化问题，采用单侧变可行域优化方法，通过人机交互，给出了满意的优化结果．仿真实例表明，该方法既可以保证各个目标函数较好地优化，又可以保证目标函数之间的优先级要求．     

平面度目标函数单谷性的研究

提出了一种通过几何分析与电算法，证明平面度目标函数为单谷函数的方法，解决 了完全用纯数学的方法难以解决的问题，为正确地优化计算平面度目标函数提供了理论 上的依据，也为论证圆度、圆柱度目标函数的单谷性提供了类似的方法。     

双正交小波的构造

由于多重尺度函数两尺度序列为矩阵序列，使得由尺度函数构造小波函数变得非常困难。通过引入多相矩阵的方法，给出了由紧支撑多重a(a∈Z,a≥2）惊讶双正交尺度函数构造双正交多小波的一种算法。该方法仅需用线性代数的知识可实现，较已有的方法简单易行。     

时变最优化信息处理技术及其应用(Ⅰ)——基本思想与系统辨识

分析了时变目标函数及其最优解的时变性能，提出了跟踪时变目标函数最优解的一阶和二阶方法，其中二阶方法能使时变目标函数最优解的跟踪以指数速率收敛。     

导函数极限的存在性及函数可导性关系初探

在讨论函数在某一点的可导性时，通常的做法是利用导函数的定义或用函数在该点的左、右导数来讨论，过程比较复杂，为了寻求一种简便的方法，总结出下面一组关于导函数极限的存在性与函数可导性间关系的命题，利用这两个命题，能使相应问题的讨论变得比较简单。     

模拟退火方法的改进及其在地震剩余静校正中的应用

分析了模拟退火非线性反演方法随机寻优的特点，提出了一种改进的具有较高计算效率的模拟退火方法，该方法采用数论中的均匀试验设计方法来建立候选解在解空间的均匀分布，少量的目标函数计算就能了解目标函数解空间性质，减少了目标函数的计算次数．理论和实际计算表明该方法具有较高的计算效率。     

随机JIT排序问题

讨论随机JIT排序问题.由于目标函数是完工时间与工期平方偏差和的数学期望(ESSD)时,有些问题的求解变的非常困难,采用的目标函数是期望完工时间与工期平方偏差和(SSDE).证明极小SSDE函数的最优排序具有V-形性质,这个性质对构造有效算法是非常有用的.于是使有的问题变得简单,使有的不能解决的问题得以解决.还证明了ESSD函数和SSDE函数的差别并不大.     

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.     

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.     

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.