带干扰的双险种非齐次复合泊松风险模型

研究了一类带干扰的双险种风险模型,其中索赔到达计数过程和保费到达计数过程均为非齐次Poisson过程,用鞅方法得到了有限时间破产概率的一个上界,并给出了当两个险种的个体索赔均服从指数分布时,有限时间破产概率的上界估计.     

带干扰的二元广义双Poisson风险模型下的破产概率

讨论了一类带干扰的双险种风险模型,其中保费到达过程和索赔到达过程是相互独立的,且索赔过程均为广义复合Poisson过程,并在模型中加上了随机干扰项。运用鞅的理论得到了最终破产概率的一般表达武和破产概率的一个上界估计。     

广义二元复合非齐次Poisson风险模型的破产概率

研究了一类双险种风险模型,其中索赔到达计数过程和保费到达计数过程(假定每次保费收入均为常数)均为非齐次Poisson过程,用鞅方法得到了有限时间破产概率的一个上界.并给出了当两个险种的个体索赔额均服从指数分布时,有限时间破产概率的上界估计.     

广义二元复合非齐次Poisson风险模型的破产概率

研究了一类双险种风险模型,其中索赔到达计数过程和保费到达计数过程(假定每次保费收入均为常数)均为非齐次Poisson过程,用鞅方法得到了有限时间破产概率的一个上界.并给出了当两个险种的个体索赔额均服从指数分布时,有限时间破产概率的上界估计.     

带投资组合和超额赔款的再保险双Cox风险模型

对于保单到达过程与索赔过程均为 Cox 过程的情况,考虑到保险公司为了规避风险进行投资组合和再保险,将经典风险模型推广,建立了一类再保险双 Cox 风险模型,运用鞅论方法得到了此模型 Lund-berg 指数上界和破产概率的上界,并给出了最终破产概率的解析表达式。     

索赔为稀疏过程的二维风险模型的破产概率

研究了二维风险模型,其中保单到达是复合Poisson-Geometric过程,且索赔发生是保单到达过程的q-稀疏过程.对二维模型定义了3种不同的破产概率,并运用一维风险模型的相关理论得到了 3种破产概率的明确表达式或者上界     

广义二元复合非齐次Poisson风险模型的破产概率

研究了一类双险种风险模型,其中索赔到达计数过程和保费到达计数过程(假定每次保费收入均为常数)均为非齐次Poisson过程,用鞅方法得到了有限时间破产概率的一个上界．并给出了当两个险种的个体索赔额均服从指数分布时,有限时间破产概率的上界估计。     

带马尔科夫利率的双险种复合双二项离散风险模型破产概率研究

在引入投资的情况下,对经典离散时间风险模型的保费收取、索赔过程及险种三个方面进行推广。引入双险种,且保险收取与索赔过程服从二项分布,利用等价变换及全概率公式得到模型的破产概率积分表达式,通过鞅方法证明改进后的模型存在破产概率上界,并应用停时定理证明该破产概率上界优于不带投资情况下的破产概率上界。     

双Cox风险模型

 双Cox风险模型作为经典风险模型的一个推广,在保费的到达和理赔的发生都服从Cox过程的假定下,得到了破产概率的上界.并在假设保单的到达和理赔的发生具有相同的累积强度过程时,给出了破产概率的明确表达式.     

条件Poisson风险模型破产概率与破产时间期望的界限

推广了经典的风险模型。对于索赔次数,我们用一个条件泊松过程刻画,通过构造一个下鞅,在破产时盈余为零的假设基础上给出了索赔到达为条件Poisson过程的风险模型破产概率的下界和破产时刻期望的上界;对于带红利情形,我们在红利线为线性情况下,给出了破产概率的下界。     

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.