In this paper , we consider the correlated risk processes with negative risk sums . we define the correlation between the two classes of insurance business as the thinning dependence structure . we mainly study how the dependence between the two classes impacts on the ruin probability 本文引入了一类相关负风险和风险过程,负风险和类之间的相关性由稀疏相关结构定义,主要研究类之间的相关性对破产概率的影响。
A new type of viscoelastic stochastic finite element method is established using first - order perturbation theory based on local averaging method of random field and karhunen - loeve expansion theory of random process . the amount of computations is greatly reduced by transforming correlated random variables to a set of uncorrelated random variables . the relations of different random response variables are analyzed and monte carlo simulations for viscoelastic stochastic structures are investigated 基于随机场的局部平均法以及随机过程的karhunen - loeve分解理论，通过一阶随机摄动方法建立了考虑材料近似不可压缩的粘弹性随机有限元公式，由相关结构分解减少计算量，分析了各结构随机响应量之间的关系，给出了数字特征的计算方法，研究了粘弹性随机结构的montecarlo模拟验证方法。
Part 2 analyses beam landing shifts made by thermal deformations of a shadow mask and vibration of a new type of shadow mask - aperture grille . an automatic measurement system for cpt decolorization and a vibration measurement system for aperture grille are established . part 3 analyses the difference of perception and discrimination to color between the human eyes and ccd system , and develops a new method based on ccd technology to evaluate the screen white - balance 主要内容分为三部分： ( 1 )分析着屏电子束分布与电子枪、偏转系统及荫罩之间的关系，研制自动测试装置，为设计和改进相关结构提供依据； ( 2 )分析荫罩热变形和振动对显示屏色纯度影响，建立了色纯漂移自动测试装置和张紧式荫罩振动测试系统； ( 3 )分析了人眼与ccd对彩色刺激的不同响应，建立了基于ccd的显示器全屏色纯均匀性测试方法。
These characteristics are in sharp contrast to what one observes in the traditional models for network traffic , models that are based on an exponentially fast decaying correlation function , implying that time - aggregation time series quickly results in white noise traffic characterized by the absence of any temporal correlations 这些新发现的网络业务量行为特征与传统业务量模型行为特征有极大的不同? ?传统业务量模型一般假定指数递减的相关结构的存在，这意味着随着时间聚合时间序列将演变为白噪音，即时间相关性渐进地消失了。
Result : the c3 to c7 , intervertebral discs , spinal cord , cervical nerves , vertebral artery , longus colli , larynx ( trachea ) , pharynx ( esophagus ) , common carotid artery ( internal and external carotid artery ) , internal jugular vein , vagus nerve and sternocleidomastoid were successfully reconstructed and displayed 结果：成功重建并立体显示第3 ~ 7颈椎、椎间盘、脊髓、颈神经、椎动脉、颈长肌、喉（气管） 、咽（食管） 、颈总动脉（颈内、外动脉） 、颈内静脉、迷走神经和胸锁乳突肌等解剖结构的位置关系，建立了颈前入路相关结构的三维可视化模型。
The numerical and experimental results of this y - branch structure indicate that the proposed y - branch structure , without extra fabrication technologies , has a lower excess loss as compared with the conventional ones . optimal designs of the structural parameters for the multimode interference coupler are carried out . low loss and high uniformity of the multimode interference couplers are achieved when the waveguide is weakly guiding 研究了y分支耦合器中分支顶端间距(为工艺制作方便)带来的附加损耗，提出了低损耗新型y分支耦合器结构，并给出了相关结构参数的优化设计方法，我们的理论计算和实验测试结果均表明，该新型结构可以在常规光波导制作工艺下提高器件的指标。
But , so far , there is little study with the relationship between cb and visceral nociceptive stimulation . morphological study of the distribution of cb - immunoreactive neurons involved in modulating visceral nociceptive signal in the related nuclei in brainstem and the projection of those neurons from nts to bst was investigated in the present study 本文主要对cb在大鼠脑干内相关结构特别是与内脏伤害性信息传递和调控相关联核团内的分布，以及参与内脏伤害性信息传递的cb样神经元由孤束核向终纹床核的投射进行了研究。
