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关键词： 结构化设计   道路桥梁   应用  

摘要： 我国的改革开放政策取得了巨大成功,从而推动了道路桥梁的发展,道路桥梁在国家经济建设中扮演着非常重要的角色,因此为了让国家经济有更大的进步,我国在道路桥梁的设计和建设方面投入了很多资金,并取得了令人欣喜的成绩。近年来人们对道路桥梁中的结构化设计越来越重视,旨在通过研究提高道路桥梁施工水平,笔者正是以此为目的,首先对道路桥梁施工中应用结构化设计的原则做了介绍,随后阐述了结构化设计在道路桥梁中的具体应用。

关键词： 项目导向   软件工程   教学改革  

摘要： 从市场需求的角度分析《软件工程》课程人才培养需求,对《软件工程》课程知识、能力、素养体系,教学模式,教学方法,考核机制等进行了研究,以此激发学生学习该学科内容的主动性和自主学习能力,从而提高《软件工程》课程教学质量.

关键词： 结构化设计   桥梁   应用  

摘要： 随着我国经济的飞速发展,交通运输业也获得了巨大的发展与进步,作为交通业中重要的组成部分,桥梁工程设计也得到了广泛的关注。论文阐述了桥梁结构化设计的必要性,并对结构化设计在桥梁中的应用进行了分析和探讨。

关键词： Internet of Everything  

摘要： After PC Internet and mobile Internet, the world is entering an era of smart Internet (Web) of everything, which is also called the human-cyber-physical ternary computing era. A main feature is that "computers" are not restricted to just PCs or smartphones anymore, but are embodied in the physical world, manifesting as trillions of smart devices. These smart devices will need diverse policies, to satisfy different needs on innovation freedom, security, privacy, governance, and user experience. One set of control policies is unlikely to satisfy the needs of the global smart Web of everything. However, the global smart Web can be divided into zones, each being a zone of control, a zone of rights, and a zone of governance. A zone has its own controlling scope and policies, such as whether the devices in a zone are tethered or tetherless. This paper proposes an architectural style for smart Web of everything, called zone-oriented architecture (ZOA), learning from the experiences of the service-oriented architecture (SOA) and the representational state transfer (REST) style. We present a zone algebra with four operators on zones, a set of three normal forms, and a set of two recommended and three optional architectural constraints. We discuss five problems of the smart Web of everything, use an application scenario to show how ZOA can help, and present open problems for future research. © 2019, Science Press. All right reserved.

关键词： Bearing multi-degree fault diagnosis   Architecture of deep learning network (DLN)   Ensemble empirical mode decomposition (EEMD)   Autoencoder   Softmax classifier  

摘要： This paper proposes a deep learning network (DLN) as the basis for a bearing fault diagnosis technique, which is constructed by the autoencoders and softmax classifier for the purpose of identifying the various multi-degree bearing fault. Firstly, the ensemble empirical mode decomposition (EEMD) method is used to decompose the original vibration signal into intrinsic mode functions (IMFs). A high-dimensionality feature vector is formed by analyzing the statistical parameters in the time domain and the frequency domain of the first several IMFs. Then, this feature vector serves as the input for DLN to classify the bearing fault pattern. In a DLN, an autoencoder performs the unsupervised feature self-learning phase to generate a final significant feature vector for training the softmax classifier. Finally, the parameters of a complete DLN based on stacking auto-encoders and the softmax classifier together is fine-tuned with respect to supervised learning criterion aiming to optimize the classification error. Experimental results have shown a great effect for bearing fault diagnosis based on the proposed DLN. The identification accuracy result has been achieved in the bearing fault status even with the unpredictable defects tests on the inner race and roller element of bearing. Methodologies in this study offer confidence for complex data classification.

关键词： Elliptic curve cryptography (ECC)   Elliptic curve scalar multiplication (ECSM)   Field programmable gate arrays (FPGA)   Internet of Things (IoT)  

摘要： In recent years, the usage of elliptic curve cryptography (ECC) in IoT applications is steadily increasing. The end nodes in IoT applications demand optimized device performance in terms of reduced power consumption and improved computing speed while not compromising on the security of the connected devices. ECC provides better security standards compared with many conventional cryptographic algorithms providing further scope to optimize the performance parameters. This work focuses on improving the key parameters like computing speed, area required for hardware implementation of ECC and demonstrates an efficient way of using the hardware resource sharing and scheduling mechanisms in elliptic curve group operations in affine coordinates which is crucial for implementation of scalar multiplication over prime field Fp. With the proposed scalar multiplication hardware architecture, we have achieved a good area-delay product and a significant reduction in cycle count when compared with other reported designs using the same affine coordinates. The proposed architecture has been implemented with 256 bits in both Xilinx Kintex-7 and Virtex-7 FPGA devices. The FPGA synthesis results show that a throughput of 68.52kbps at a clock frequency of 124.2MHz is achieved for F256 and the computation time is reduced around 1ms without using any DSP slices.

关键词： 新工科   工程教育   软件工程  

摘要： 在新工科背景下,探索一条适合民办院校工程教育改革的培养模式,提出了几点民办高校软件工程专业进行工程教育改革的措施,以培养学生运用所学专业知识解决实际负责工程问题的能力,提高学生走入社会的竞争力。

关键词： Distributed testing   system dependence graph   test case prioritization   test script   object-oriented program testing  

摘要： Software systems have increased in size and complexity. As a result, object-oriented programming (OOP) is increasingly being used in the development of such large and complex systems. Traditional procedural programming requires a design method that follows a sequential flow of control, which is difficult to follow in the case of large systems design. Thinking in terms of real-life objects and their interactions makes design easier in the case of OOP. However, OOP comes with its own set of disadvantages and testing is one of them. Testing of such systems requires much more effort and time. In our approach the program is analyzed to build a system dependence graph-based model. This model is analyzed for test script generation and to find state-save points within the program where the state of the program can be saved and reused for executing another test case. The test cases are prioritized looking at the structural complexity of the program. The distributed testing presented here is different from traditional distributed testing, where they address testing of web and distributed applications. The distributed architecture developed in this work enables testing of OOP in an efficient manner. The concept is implemented for Java programs as there is support for continuation.

关键词： 坚果类农产品   购物网站   结构化设计   微信公众号  

摘要： 坚果类农产品是黑龙江主要的森林特产之一,近年来由于其绿色健康无污染的优势而备受广大消费者青睐。随着互联网技术的发展,人们的购买方式发生了极大改变,传统的销售模式已经不足以应对市场需求。运用互联网技术能够有效地帮助企业实现对农产品的销售管理。本文设计开发基于微信公众号的坚果类农产品信息网,为黑龙江省坚果类农产品实现现代化销售,为涉农中小型企业提供适应市场需求新的销售模式。该网站是以微信公众号作为面向微信用户的购物网站,提供店主一个省时省力、美观综合的虚拟网络店面。该课题根据软件工程思想,研究应用技术,分析需求特点,设计分为两个子系统:前台商城子系统和后台管理中心子系统。前台商城可实现坚果类农产品展示、查询以及用户注册、登录、购物,顾客用户只需要关注该农产品信息网的公众号就能够轻松访问到网站的前台商城;后台管理中心对坚果类农产品、顾客、订单、公告进行管理以及提供数据分析的仪表盘等功能,方便店主用户及时了解前台商城的销售情况,帮助提供有效的销售决策信息。网站采用结构化设计,有利于网站的维护和功能的扩展。网站采用Apache服务器、MySQL数据库、PHP程序设计语言,基于Bootstrap前端框架以及Yii2框架,依托微信公众号进行开发实现。本文对该网站的需求分析、数据库设计、网站的设计实现与测试的开发过程进行了详细地描述。在需求分析阶段,了解了用户对于网站的基本需求,并进行了可行性分析。在概要设计阶段,设计了系统体系结构,并分别对子模块、数据中心、业务逻辑进行设计。在详细设计与实现阶段,从代码角度对系统各个功能进行了设计与实现。最后在测试阶段,对该坚果类农产品信息网整个系统进行了功能上的测试,确保功能上的完整性。本文设计实现的坚果类农产品信息网对于店主而言,可以大幅度降低投资的成本,方便店主经营管理,拓宽农产品的销售渠道。同时,也为其他类农产品的销售提供一个能够借鉴参考的可行性解决方案。

关键词： 供应链   金融管理   在线融资   凭证管理   UML建模  

摘要： 在经济全球化趋势下,供应链逐步由地区化想全球化发展,供应链金融随之应运而生。供应链金融是由供应链中实力最雄厚的企业向银行申请信用保证,从银行中完成资金借贷并利用资金在供应链中流通,保证整个供应链各节点处的企业都能够获得周转资金实现盈利,从而达到多方共赢。从银行角度来看,由于有实力雄厚的公司做保证,贷款的风险在可控范围内,通过贷款可以获得贷款利息等利润,对自身也有着有利的影响。近年来,随着计算机技术特别是互联网技术的迅速发展,供应链金融与互联网的耦合程度不断提高,信息化的供应链金融成为一种常态。本文将结合笔者所属公司的实际需求与市场调研,开发出一套基于真实贸易背景及核心企业信用,为各参与方提供实名认证、用户管理、在线融资、资金管理等功能的供应链金融管理平台。在对东方云供应链金融管理平台具体设计与实现过程中,在展开深入的市场调研后,对整个平台的功能需求进行了详细的分析,在此基础上,通过UML建模方式完成并设计了系统中的登录注册与开户、凭证管理、在线融资以及资金管理四大功能模块,在对整个供应链金融管理平台数据库设计过程中主要采用了SQL Server 2016数据库技术,在对整个系统架构进行设计时选取的是MVC架构技术进行。其中,在对系统功能模块进行设计时,主要对系统四大核心功能模块进行了设计与说明,在进行各个功能模块的设计时,完成了的工作时序图、工作流程图以及类图的设计。根据功能模块的设计,完成了论文系统的数据库总体E-R图设计,并设计了对应的数据信息表。最后对设计的四大功能模块进行了实现与功能测试。本课题开发的东方云供应链金融管理平台能够满足实际应用需求,利用这一平台,能够实现对供应链金融业务的管理,掌握整条供应链上的关联业务信息,并对供应链的具体经营风险能够合理控制,从而有效减少供应链运营过程中的成本,进而促进供应链中运营方与企业方等多方面的经济效益,实现互利共赢局面。另外该平台还能够有效降低银行等金融机构的贷款风险与管理成本,对提高金融机构资产质量也有着积极的作用。