“成长三角”贸易发展影响因素的系统分析

用结构模型化技术,研究了影响“成长三角”贸易发展的因素。为“成长三角”贸易发展政策和措施的制定提供了科学依据.     

An Additive-Multiplicative Cox-Aalen Subdistribution Hazard Model for Competing Risks Data

This paper proposes a flexible additive-multiplicative Cox-Aalen hazard model which allows time-varying covariate effects for the subdistribution in a competing risks study. Weighted estimating equation approaches under an covariates-dependent adjusted weight by fitting the Cox proportional hazard model for the censoring distribution are established for inference on the model parametric and nonparametric components. In addition, large number properties are presented and the finite sample behavior of the proposed estimators is evaluated through simulation studies, estimators from the proposed method perform satisfactorily on reduction of the bias. The authors apply our model to a competing risks data set from a tamoxifen trail for breast cancer study.     

4×4整数变换的流算法研究

4×4整数变换是H.264视频压缩标准的关键技术之一,对H.264编解码器的整体性能有重要影响。基于流处理的思想,提出了一种适用于H.264整数变换的混合流式变换算法MSTA,并将其映射到了Imagine流处理器上。实验结果表明,MSTA流实现处理一次4×4整数变换仅需4.5ns,远超出当前实时应用的需求。另外,流处理器良好的灵活性将使MSTA拥有更广阔的应用前景。     

基于支持向量机的重力匹配算法

为了在重力异常特征微弱区域内实现重力辅助导航以及提高惯性导航系统在重力异常特征明显区域内的定位精度和匹配率,提出了基于支持向量机的重力匹配算法.研究了支持向量机学习样本的选取、支持向量机参数和重力粗糙度的关系,构造了用于重力匹配算法的支持向量机.经计算仿真研究表明,通过选择适当的支持向量机参数,可以实现重力辅助导航,算法在重力特征显著的区域具有较高的匹配率,组合导航系统的定位误差在一个重力图网格左右.     

A Java-Based Approach for Developing Web Application System

1.INTRoDUCTIONCreatingInternet,IntranetandExtranetapplicationsarecurrentlycenterofprogrammingfocus.Theyallbelongtoweb-basedbusinessapplications[1lthatrequiredatabaseconnec-tion,userauthentication,sessionmanagementanddynamicHTMLgeneration.Web-basedapplicationsshouldhavefollowingfeatures:1)Platform-independelltontheclientside,usuallyabrowser;2)Platform-independentontheserverside,suchasincludingbothUnixandWindowsenvironments;3)Beabletoconnecttoavarietyofdatabase,suchasincludingoracle,Inf…     

A situation calculus based approach to dynamic management of e-business services

In the era of e-businesses, the traditional business services are greatly challenged by the ever-increasing demands from customers with various backgrounds and personalities. Large numbers of new e-businesses are driven by the needs of customers. The existing dynamics inherent in the customer needs require the corresponding dynamic management of services. Attempting to respond to customers in a rapid and intelligent way, this paper proposes a situation calculus based approach for dynamically managing e-Business services in the ubiquitous environment. By employing the formalism of the situation calculus to enable intelligence and automation, the approach can implement. the functions of service automatic composition and model verification. These functions will improve the degree of customer-orientation and enable fast responsiveness in the emerging e-service systems.     

基于深度强化学习的云作业调度及仿真研究

针对复杂瞬变的多用户多队列多数据中心云计算环境中作业调度困难的问题,提出一种基于深度强化学习的作业调度方法.建立了云作业调度系统模型及其数学模型,并建立了由传输时间、等待时间和执行时间三部分构成的优化目标.基于深度强化学习设计了作业调度算法,给出了算法的状态空间、动作空间和奖赏函数.设计与开发了云作业仿真调度器,完成作...     

一种自适应的图象位移估计算法

本文从最优化方法的观点出发,提出了一种新的图象位移估计算法。它对一定时间间隔内两次采样得到的图象进行运算,用最陡梯度下降法直接迭代出图象位移的估计值。本文还对算法的性能进行了详细的分析,得出估计方差与信噪比、图象相关函数等参数之间的定量关系式,以及由于坐标量化引起的算法对图象特性的限制条件。理论分析和实验表明,该算法具有较强的抗干扰能力和计算量少等优点,可应用于成象跟踪和图象编码等领域。