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关键词： 道路桥梁设计   结构化   设计研究  

摘要： 目前,我国的经济真处于稳步发展,城市化进程的脚步逐渐增快.道路桥梁设计的是否合理,将直接影响到整体交通的质量和状况.在有限的占地面积下,道路规划和道路桥梁的设计的重要性日渐凸显.本文主要阐述了道路桥梁设计中关于结构化设计的研究、结构化设计的研究过程中所出现常见的问题以及常见问题的相关解决方案.以期在提升交通系统的安全性和稳定性的同时,也能提升交通的效率.

关键词： 重构   面向对象分析   面向对象设计   Refactor   代码  

摘要： 本文揭示了代码重构的详细过程,阐述和解释了重构的原理和最佳实践方式,并给出了代码重构的改善建议。本文提出的重构过程将帮助我们改善代码的质量和可读性,减少软件开发过程的风险。

关键词： 自主式水下机器人(AUV)   混合式控制   VxWorks   控制系统  

摘要： 为提高自主式水下机器人(Autonomous Underwater Vehicle,AUV)控制系统的鲁棒性,将分层递阶结构与包容式结构相结合,提出了一种混合式控制体系结构,开发了基于VxWorks的微小型AUV控制系统.该系统以"海事金枪鱼"号AUV为载体,以嵌入式PC104计算机为系统核心,通过传感器的信息融合、算法实现和多任务运行,控制系统驱动推进器、舵、翼等执行单元实现AUV的姿态调整、导航和路径规划,最终达到自主作业的目的."海事金枪鱼"号AUV的开发应用,验证了方案的可行性以及控制系统的可靠性和稳定性.

关键词： UML   RFID   图书馆   模型  

摘要： 使用UML语言对图书馆管理系统进行建模,分析和设计出了系统的主要架构和功能,介绍了该系统的方案设计、硬件配置和程序设计,并对其中的特色功能进行了分析。

关键词： 联锁   进路控制   Event-B方法   多智能体系统(MAS)  

摘要： 基于计算机联锁系统是一个对列车行驶系统提供安全条件的系统,车站联锁系统是保证车站行车安全和提高运输效率的典型安全苛求性系统。以形式化方法 Event-B为基础,引入角色Agent对联锁系统进行规范定义,通过智能体与Event-B的建模和验证,构造了车站联锁进路控制逻辑形式化验证模型,并进行了形式化规范和推理,该模型在RODIN平台上进行验证,通过实例验证,满足了计算机联锁系统的安全需求。

关键词： DFT   DSP processor   FFT   Single path delay feedback   Multi path delay commutator  

摘要： The modern real time applications like orthogonal frequency division multiplexing and etc., demand high performance fast Fourier transform (FFT) design with less area and clock cycles. This paper proposes efficient FFT VLSI architectures using folded/parallel implementation. In the proposed folded FFT architecture, the number of cycles required to complete the operation is less than single path delay feedback (SDF)/multi-path delay commutator (MDC) architectures. In the proposed parallel FFT architecture, N-point FFT is implemented by using one N/2-point FFT without much extra hardware. Both the proposed architectures are implemented for radix-2, 2(2), and 4 using 45 nm technology library. The proposed parallel architecture achieves 56.7% and 40.6% of area reduction as compared with the existing parallel architecture based 16-point radix-2 and radix-2(2) DIF FFTs respectively. The proposed folded architecture achieves 65.5%, 51.1%, and 35.8% of worst path delay reduction as compared with the existing SDF based 16-point radix-2, radix-2(2), and radix-4 DIF FFTs respectively. (C) 2016 Elsevier B.V. All rights reserved.

关键词： Graded porous structures   Minimal surfaces   Failure mechanism   Additive manufacturing  

摘要： Since the advent of additive manufacturing techniques, triply periodic minimal surfaces lave emerged as a novel tool for designing porous scaffolds. Whereas scaffolds are expected to provide multifunctional performance, spatially changing pore patterns have been a promising approach to integrate mechanical characteristics of different architectures into a unique scaffold. Smooth morphological variations are also frequently seen in nature particularly in bone and cartilage structures and can be inspiring for designing of artificial tissues. In this study, we carried out experimental and numerical procedures to uncover the mechanical properties and deformation mechanisms of linearly graded porosity scaffolds for two different mathematically defined pore structures. Among TPMS-based scaffolds, P and ID surfaces were subjected to gradient modeling to explore the mechanical responses for stretching and bending dominated deformations, respectively. Moreover, the results were compared to their corresponding uniform porosity structures. Mechanical properties were found to be by far greater for the stretching dominated structure (P-Surface). For bending dominated architecture (D-Surface), although there was no global fracture for uniform structures, graded structure showed a brittle fracture at 0.08 strain. A layer by layer deformation mechanism for stretching dominated structure was observed. For bending dominated scaffolds, deformation was accompanied by development of 45 shearing bands. Finite element simulations were also performed and the results showed a good agreement with the experimental observations. (C) 2016 Elsevier Ltd. All rights reserved.

关键词： 工作室   实践教学   软件工程   项目驱动  

摘要： 为使软件工程专业的毕业生能较好适应软件企业需求,提升本专业学生的综合能力势在必行。近年来我校在软件工程专业中引入依托工作室的实践教学形式,取得了良好的教学效果,毕业生的就业率明显提升。该文从工作室的定位、教学项目的选择以及工作室的运作等方面进行了较为详细的阐述,对依托工作室的实践教学进行了有益的探索。

关键词： 软件工程   教学改革   实践教学   案例教学   实践环节  

摘要： 软件工程是计算机专业中一门重要的基础课程,其实践性、应用性很强。文章根据软件工程课程教学存在的问题,结合软件工程课程教学的实际,提出了相应的改革策略,有效地提高了教学效果。