基于脱氧核糖核酸计算模型的概念创新设计

采用脱氧核糖核酸(DNA)计算方法解决了概念模型筛选问题.首先,引入骨骼结构表示概念模型,构建了骨骼结构及设计了偏转角度和骨骼弧度DNA分子编码方式.其次,在提出了DNA计算的算法流程后用计算机模拟实验的方法验证了算法流程的可行性.然后,依据提取出的DNA分子片段长度并按照K-means方法把每种组件划分为了5类.再次,采用信息熵计算方法,计算出了每一个评价参数权重之后,建立了概念模型的评价函数.最后,实验结果表明:合理的评价函数可以描述出概念模型的结构特点,进而根据其评价函数可以快速有效地找到符合需求的设计方案.此外,由于相似的概念模型其评分很接近,可以通过比较相近评分的概念模型提取出共有的设计组件,从而为后续设计开发提供素材.     

3D卡通角色的快速骨架提取算法

为了简化模型的骨骼绑定工作,设计一套自动计算骨架的方法。该算法以模型的2D轮廓作为输入,从轮廓中提取候选关节点并构造2D骨架,再映射到相应的3D模型上,并采用神经网络算法增强骨架的通用性和质量。试验证明:使用该算法可大幅度提升骨架提取的性能,在移动设备上可以在1s内完成整个骨架计算流程,且其精度损失基本可以忽略不计;该算法可以处理多样化的卡通角色,既能帮助普通用户完成骨骼绑定工作,也可以提高专业设计师的工作效率。     

基于“DNA折纸术”设计图着色问题的解决方案

色数是图论中的一个重要的参数,其属于著名NP(Non-deterministic Polynomial)-完全问题范畴.巨量的着色方案使验证变得相当困难,以至于在传统计算机上无法实现.目前已经有多种算法用于研究图定点着色问题,比如遗传算法,粒子群算法,神经网络算法和模拟退火算法等.随着DNA自组装技术与DNA计算机研究的展开,一些NP-完全问题以及NP-难问题的计算模型被相继提出.除了传统的DNA分子结构被用作计算材料外,其他的DNA分子结构也被用于分子生物计算,比如质粒DNA分子、分子信标结构以及DNA Tile等.采用DNA纳米折纸结构编码信息,借助于纳米结构之间的粘性末端进行自组装,给出了一种非确定性的图着色模型.通过创建数以亿计的参与计算的DNA纳米折纸结构,该算法可以并行的测试每种可能的着色方案.     

基于改进的克隆选择算法的分子对接设计与实现

详述了分子对接方法的基本原理,讨论分子对接过程中两个要素:评分函数和构象搜索算法.利用经验结合自由能的评价函数,对分子对接软件Auto Dock原有模型进行了改进.通过对评分函数的改进,用改进的克隆选择算法作为分子对接过程中的构象搜索算法.经实验效果对比,此方法寻优能力较好.     

不同适应度函数的遗传算法在桥梁结构传感器布设中的应用

从模态振型正交性和模态能量两方面出发设计了3个适应度函数,将其分别应用于改进遗传算法和单亲遗传算法。采用两步法对大跨径桥梁结构传感器布设进行定量和定位分析。通过对两种遗传算法、3个适应度函数及有效独立算法在大跨径拱桥中的对比分析,证实了单亲遗传算法比改进遗传算法更适合于桥梁结构传感器的布设,基于组合评价准则适应度函数比单一评价准则适应度函数布设出的传感器位置更加合理,验证了两步法用于传感器定量及定位计算的有效性 。     

基态SiC(X~1Σ~ )分子势能函数的研究

运用Gaussian 94程序 ,由从头计算方法计算了基态SiC(X1Σ )分子的平衡结构和离解能 ,利用单点计算的结果 ,采用Murrell Sorbie函数形式 ,拟合出了SiC分子的分析势能函数 ,并计算出SiC分子的光谱常数ωe,ωeχe,Be,αe的值 .     

改进多种群粒子群算法辨识光伏组件参数

针对光伏组件参数辨识问题,通过调整光伏单二极管超越方程重构低计算复杂度的目标函数,以预估计模型参数对搜索空间进行优化.然后,结合多种群粒子群算法与单纯形算法的优点,构造出N-MPSO混合新算法用于光伏组件模型参数的精确稳定辨识.最后,利用多种实际光伏组件测量数据对所提方法进行检验.结果表明:N-MPSO算法相较于传统算法能够更加准确、快速,且能稳定地辨识出任意环境条件下光伏组件的模型参数,对于光伏组件及光伏电站的设计、测试与诊断具有实际意义.     

工作流技术在医学影像算法平台中的应用研究

将工作流技术引入算法开发平台,采用组件与多层体系结构建立了一个算法流程,可以动态管理的集成化医学影像算法平台,并给出了一个算法列表组件实例来分析工作流技术在算法平台中的应用.通过该平台研发出的肺癌计算机辅助诊断原型系统,算法流程定义灵活,基于多名临床肺癌患者CT影像测试,对于肺结节检测敏感性较高,基本满足医生临床诊断需求.     

结合免疫聚类和免疫进化规划的RBF网络设计方法

提出了一种结合免疫聚类和免疫进化规划的径向基函数(RBF)网络设计方法.该方法采用人工免疫聚类机制根据输入数据集合自适应地确定RBF网络隐层中心的数量和初始位置,并通过提取RBF网络核函数宽度的先验知识作为疫苗构成免疫算子.该算子可以缩小进化算法搜索空间的范围,提高算法的收敛速度.仿真结果表明,采用本方法设计的RBF网络结构精简,具有较强的泛化能力.     

军事仿真概念模型向组件模型的转换方法研究

作战过程涉及内容繁多,把静态的军事仿真概念模型转化为可重用性较高的仿真模型,对作战过程仿真具有重要意义.为此,提出了军事仿真概念模型向组件模型的转换方法.首先,对军事仿真概念模型和组件模型进行阐述并给出了形式化定义;其次,给出了军事仿真概念模型向组件模型的转换框架以及实现流程;最后,通过城市防空这个实例验证了军事仿真概念模型向组件模型转换方法的有效性.     

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.