面向个人自组织网络的硬件资源管理

随着各类智能终端的普及,多屏互动等跨设备使用硬件资源的应用不断涌现,对硬件资源管理的跨平台性和交互扩展性提出了更高的要求.然而,当前针对硬件资源共享的应用大多是缺少交互性的跨设备投影镜像技术,或者只是相互独立的简单应用,面向的平台、硬件资源类型单一,难以灵活有效地应对新增需求.针对这一问题,研究了个人自组织网络环境下多设备的硬件资源（键盘、鼠标、摄像头等）的管理调配,并提出一个具有良好跨平台性、可扩展性的应用框架,使得设备能够像使用本机硬件一样使用其他设备上的硬件资源,借此方便用户对其多个设备进行管理控制.该框架包括设备间通信和硬件资源管理两层,前者提供信息传输服务,保证实时通信,后者负责管理可以访问到所有硬件资源,并提供资源申请、使用和状态改变通知等功能,极大地方便了跨设备应用的开发.     

Bayesian zero-order TSK fuzzy system modeling

Different from the existing TSK fuzzy system modeling methods, a novel zero-order TSK fuzzy modeling method called Bayesian zero-order TSK fuzzy system (B-ZTSK-FS) is proposed from the perspective of Bayesian inference in this paper. The proposed method B-ZTSK-FS constructs zero-order TSK fuzzy system by using the maximum a posteriori (MAP) framework to maximize the corresponding posteriori probability. First, a joint likelihood model about zero-order TSK fuzzy system is defined to derive a new objective function which can assure that both antecedents and consequents of fuzzy rules rather than only their antecedents of the most existing TSK fuzzy systems become interpretable. The defined likelihood model is composed of three aspects: clustering on the training set for antecedents of fuzzy rules, the least squares (LS) error for consequent parameters of fuzzy rules, and a Dirichlet prior distribution for fuzzy cluster memberships which is considered to not only automatically match the “sum-to-one” constraints on fuzzy cluster memberships, but also make the proposed method B-ZTSK-FS scalable for large-scale datasets by appropriately setting the Dirichlet index. This likelihood model indeed indicates that antecedent and consequent parameters of fuzzy rules can be linguistically interpreted and simultaneously optimized by the proposed method B-ZTSK-FS which is based on the MAP framework with the iterative sampling algorithm, which in fact implies that fuzziness and probability can co-jointly work for TSK fuzzy system modeling in a collaborative rather than repulsive way. Finally, experimental results on 28 synthetic and real-world datasets are reported to demonstrate the effectiveness of the proposed method B-ZTSK-FS in the sense of approximation accuracy, interpretability and scalability.     

软件设计模式课程实验教学系统探索

设计模式是软件工程专业的重要核心课程,兼具理论性和实践性,但其高度的抽象性给学生学习带来较大困难.针对该课程及学生的认知特点,设计开发了一个基于Spring框架的设计模式实验教学系统-在线教务管理平台,该系统采用B/S架构,综合了多种常用设计模式,不仅展示了单个设计模式的特点,同时展示了这些设计模式在实际项目开发中的复合应用,有助于学生加深设计模式方法学理论精髓的理解,提高实践动手能力,从而为进一步掌握高级软件工程知识奠定基础.     

ASP.NET MVC模型绑定应用研究

分析了ASP.NET MVC框架中模型绑定的本质及过程,说明了何时需要自定义扩展,并给出了模型绑定框架中的自定义扩展的实现方法。     

使用Qt/C++编程操作Microsoft Office软件的应用

Microsoft office系列软件在日常工作中应用广泛。我单位在工程项目中大量使用Office软件进行数据处理及交换,对这些原始数据采取适当的方法分析挖掘,可以极大地缩短设计与试验周期、降低成本。由于项目产生的临时数据常以不同格式存放在各种办公软件中,且数量巨大,所以需要一个可以控制Office系列办公软件的程序来完成原始信息的收集及输出。给出了通过使用基于C++的Qt框架并结合COM、ODBC技术获取、处理数据,并输出至数据库或XML文档的实现方法。     

面向RFID的框架化数据融合中间件研究与设计

介绍了基于数据融合的结构可扩展软件开发框架（xDFF）及其规范体系,在此框架下,主要研究并设计了包括RFID数据资源集成与融合应用平台的建模方法、工具及实现方法,旨在设计一种高效且可扩展的,支持海量RFID数据采集、过滤、聚合、事件管理以及存储、维护、查询和安全管理等功能的环境与工具,实现普遍适配,提供二次开发接口,与企业数据集成并进行统一管理的模块化框架化RFID数据融合中间件产品.     

基于开源软件的WebGIS框架设计

WebGIS网络地理信息系统是Internet技术应用于GIS地理信息系统开发的产物.在互联网环境下,以Web页面作为GIS软件的用户界面,把Internet和GIS技术结合在一起,可为各种地理信息应用提供GIS功能,以提高系统性能,使用户共享互联网资源.为此,在开源软件的基础上,通过使用GeoServer、PostGIS数据库和OpenLayers实现了WebGIS的展示层、处理层和数据层三层体系框架.     

Combining intensional with extensional query evaluation in tuple independent probabilistic databases

In this paper, we prove that a query plan is safe in tuple independent probabilistic databases if and only if its every answer tuple is tree structured in probabilistic graphical models. We classify hierarchical queries into core and non-core hierarchical queries and show that the existing methods can only generate safe plans for core hierarchical queries. Inspired by the bucket elimination framework, we give the sufficient and necessary conditions for the answer relation of every candidate sub-query to be used as a base relation. Finally, the proposed algorithm generates safe plans for extensional query evaluation on non-boolean hierarchical queries and invokes the SPROUT algorithm [24] for intensional query evaluation on boolean queries. A case study on the TPC-H benchmark reveals that the safe plans of Q7 and Q8 can be evaluated efficiently. Furthermore, extensive experiments show that safe plans generated by the proposed algorithm scale well.     

A parallel two-level method for simulating blood flows in branching arteries with the resistive boundary condition

Computer modeling of blood flows in the arteries is an important and very challenging problem. In order to understand, computationally, the sophisticated hemodynamics in the arteries, it is essential to couple the fluid flow and the elastic wall structure effectively and specify physiologically realistic boundary conditions. The computation is expensive and the parallel scalability of the solution algorithm is a key issue of the simulation. In this paper, we introduce and study a parallel two-level Newton–Krylov–Schwarz method for simulating blood flows in compliant branching arteries by using a fully coupled system of linear elasticity equation and incompressible Navier–Stokes equations with the resistive boundary condition. We first focus on the accuracy of the resistive boundary condition by comparing it with the standard pressure type boundary condition. We then show the parallel scalability results of the two-level approach obtained on a supercomputer with a large number of processors and on problems with millions of unknowns.     

Towards inverse modeling of turbidity currents: The inverse lock-exchange problem

A new approach is introduced for turbidite modeling, leveraging the potential of computational fluid dynamics methods to simulate the flow processes that led to turbidite formation. The practical use of numerical flow simulation for the purpose of turbidite modeling so far is hindered by the need to specify parameters and initial flow conditions that are a priori unknown. The present study proposes a method to determine optimal simulation parameters via an automated optimization process. An iterative procedure matches deposit predictions from successive flow simulations against available localized reference data, as in practice may be obtained from well logs, and aims at convergence towards the best-fit scenario. The final result is a prediction of the entire deposit thickness and local grain size distribution. The optimization strategy is based on a derivative-free, surrogate-based technique. Direct numerical simulations are performed to compute the flow dynamics. A proof of concept is successfully conducted for the simple test case of a two-dimensional lock-exchange turbidity current. The optimization approach is demonstrated to accurately retrieve the initial conditions used in a reference calculation.