Feature Solution in the Process of Parameterizing Port Model

Aimed at attaining to an integrated and effective pattern to guide the port design process, this paper pats forward a new conception of feature solution, which is based on the parameterized feature modeling. With this solution, the overall port pre-design process can be conducted in a virtual pattern. Moreover, to evaluate the advantages of the new design pattern, an application of port system has been involved in this paper; and in the process of application a computational fluid dynamic analysis is concerned. An ideal effect of cleanness, high efficiency and high precision has been achieved.     

正逆向重构技术在航空发动机机匣中的应用

为提高传统正、逆向工程设计中的模型重构效率与精度,解决航空发动机机匣因形状复杂导致实体造型困难的问题,研究逆向工程与正向建模相结合的模型重构方法及其特点。以某型航空活塞发动机机匣为研究对象,绘制机匣正逆向混合重建流程图,搭建测量扫描环境,利用三维扫描设备对机匣形面进行数据采集,并使用Geomagic Design X等软件进行数据处理与优化,最终得到机匣数字重构模型。通过偏差检测分析得出,模型平均重构精度误差小于0.5mm,重要配合端面平均误差小于0.1mm,与实际情况相吻合,验证了正逆向重构技术的正确性与便捷性,对航空发动机机匣性能预测、疲劳仿真及结构维修具有一定指导意义。     

新一代网络搜索系统ASK MSR的结构分析

针对现有搜索引擎准确度不高．所得结果仍需用户花费大量精力筛选的现状．Microsoft提出一种基于“问题—回答”系统的新型搜索系统。它对一个给定的问题，经过问题解析，网上搜索，过滤筛选．答案提取等几步，能给出相对应的直接答案。本文着重介绍了该系统的核心部件“问题—回答”系统的体系结构及其各组成部件的工作原理。     

倾听学生意见开展教学改革

素质教育要求教师不断开展教学改革和探索新形势下的教学规律。本文介绍的在课程结束后全面调查学生意见的方法是进行教学改革、提高教学质量的有效途径之一。它一方面从学生的角度对课程的教学质量做出权威的评价,另一方面为教师积极进行教学改革提供最有价值的参考。     

沉积学和海洋生物学野外综合实习模式的探索

沉积学和海洋生物学都是实践性很强的学科。本文就实习的准备、实习阶段的实施、实习报告的写作,以及成绩的评定几个方面,对如何做好两者之间的野外综合实习做了初步探索。     

Development of the International Ocean Literacy Survey: measuring knowledge across the world.

The Ocean Literacy movement began in the U.S. in the early 2000s, and has recently become an international effort. The focus on marine environmental issues and marine education is increasing, and yet it has been difficult to show progress of the ocean literacy movement, in part, because no widely adopted measurement tool exists. The International Ocean Literacy Survey (IOLS) aims to serve as a community-based measurement tool that allows the comparison of levels of ocean knowledge across time and location. The IOLS has already been subjected to two rounds of field testing. The results from the second testing, presented in this paper, provide evidence that the IOLS is psychometrically valid and reliable, and has a single factor structure across 17 languages and 24 countries. The analyses have also guided the construction of a third improved version that will be further tested in 2018.     

基于自动化卓越工程师计划实训教学改革

教育部为了贯彻落实《国家中长期教育改革和发展规划纲要(2010-2020年)》和《国家中长期人才发展规划纲要(2010-2020年)》项目,实施了卓越工程师教育培养计划。文章分析了自动化卓越工程师计划实训教学改革必要性、实训教学体系中存在的关键问题,并对卓越工程师实训教学改革进行探索。研究成果有助于培养自动化卓越人才的创新意识和工程素质,提高工程实践动手能力和专业知识,更好地适应社会经济发展。     

柴油机起动困难的原因及诊断排除

柴油机具有比汽油机更高的可靠性、经济性,因而应用也日益广泛,而柴油机的故障原因、诊断排除与汽油机又不尽相同,主要从高、低压油路;柴油的品质;喷油量及喷油质量等方面讨论了柴油机起动困难的原因及故障排除,并通过实例对其进行分析.     

发动机防喘装置故障监控方案制定

民用航空飞机设计有防喘装置预防发动机喘振。防喘装置故障会导致发动机喘振裕度下降,可靠性降低。重要的防喘装置故障飞机须停场排故,导致可用率降低,非计划停场率增加。通过对喘振及防喘装置工作原理进行研究,对故障信息进行分类,分析产生原因,结合历史故障数据,总结排故方法,并应用于飞机故障监控系统中。实现在飞机运行过程中实时监控防喘装置故障,提前制定排故方案,调配所需资源,以缩短排故时间,提高运行效率。     

Impact of commercial search engines and international databases on engineering teaching and research

For the last three decades, the engineering higher education and professional environments have been completely transformed by the ‘electronic/digital information revolution’ that has included the introduction of personal computer, the development of email and world wide web, and broadband Internet connections at home. Herein the writer compares the performances of several digital tools with traditional library resources. While new specialised search engines and open access digital repositories may fill a gap between conventional search engines and traditional references, these should be not be confused with real libraries and international scientific databases that encompass textbooks and peer-reviewed scholarly works. An absence of listing in some Internet search listings, databases and repositories is not an indication of standing. Researchers, engineers and academics should remember these key differences in assessing the quality of bibliographic ‘research’ based solely upon Internet searches.