Oxidation-abrasion of TiC-based cermets in SiC medium

The aim of the current study was to investigate the effect of oxidation on abrasive wear behaviour of TiC based cermets at temperatures ranging from 20 to 900 °C. Three types of material performance maps were constructed: oxidation rate maps, wear rate maps and maps showing the effect of oxidation on abrasion. Discussion on the performance of different cermet grades is supported by the SEM images combined with EDS and XRD analysis. The results should facilitate the selection of TiC-based cermets providing optimum composition of cermets for high temperature applications.     

GPS-RTK与全站仪相结合在矿业权实地核查中的应用

在大同市矿业权实地核查过程中,根据相关规范和设计方案,采用GPS-RTK与全站仪相结合的方法,应用南方CASS软件成图,并对采集的数据进行检核,实践证明,该方法可以快速准确的获得实地矿区特征点、地物点的定位信息,满足矿业权实地核查的精度要求.     

基于复映测量的球头刀具磨损数据处理及其软件开发

在铣削加工中,刀具磨损对产品加工质量有重要的影响,以球头刀具磨损为研究对象,为了建立刀具磨损模型,采用复映测量手段获取刀具磨损,在复映测量获得刀具磨损的过程,针对复印测量的球头铣削刀具磨损数据提出了数据处理的方法,并以Visual C++为开发平台实现了基于复映测量的刀具磨损数据处理模块,为基于复映测量的刀具磨损建模提供了基础,所提出的刀具磨损数据处理方法可有效对刀具磨损数据进行分析建立刀具磨损模型。     

变杆长参数化四杆机构的运动学仿真

基于商用软件平台ADAMS,采用参数驱动技术创建了铰链四杆机构的运动学仿真模型和相应的人机操作界面,通过建模和运动学仿真,方便快捷地绘制了精确的四连杆机构分析图谱,实现了铰链四杆机构连杆曲线图谱的绘制功能,从而为四杆机构设计提供了准确的设计数据.该研究成果对于四杆机构运动轨迹选型和尺度综合具有一定的工程指导意义和应用价...     

三维建模与机械制图课程测绘改革探索

随着三维CAD技术的发展,三维建模技术不仅在工程图学教学中对提高学生的形象思维能力和抽象思维能力起着重要作用,同时也是今后工程设计的主要手段。但是,由于各大、专院校受课程开设和学时的限制,这就要求制图教学加大改革力度,进一步转变图学教育思想,在机械制图测绘实验课中增加这一内容,将使三维建模技术教育成为可能,并为后继课程学习打下良好基础。     

移动互联技术助力博物馆社会化服务

移动互联网技术和智能手机发展给博物馆带来了新的契机,同时也给观众带来了新颖独特的体验,利用移动互联网延伸博物馆的社会教育服务功能,科技与文化相结合,将文化送到公众手上,科技助力文化传播可以让文化更亲民,让文化服务更惠民。借助移动互联网技术,利用3G/4G手机、PAD等各类移动终端,运用最新的掌上微游、数字导览、知识图谱、社交互动等方式打造可以随身携带的博物馆。     

虚拟网络映射模型和算法研究

虚拟网络映射是网络虚拟化的关键问题之一,其目的是在满足虚拟网络资源需求的前提下,为该虚拟网络分配合适的底层网络节点和链路资源,从而在共享的物理网络基础设施之上构建彼此隔离的多重异构虚拟网络,为网络基础创新研究提供实验环境和平台,为网络新应用提供承载服务。论述了虚拟网络映射模型和映射算法,并提出基于最小割集理论设计VN映射算法。     

Load mapping for seamless interface between hydrodynamics and structural analyses

This paper addresses the problem of a seamless interface between hydrodynamics and structural analyses. A pressure distribution on a hydro model computed from seakeeping analysis needs to be transferred to a structural model for evaluating structural strength and its integrity. However, due to the differences in the computation and representation methods for both analyses, the load on the hydro model may not be correctly transferred to the structural model, leading to a different load distribution on the structural model and resulting in some unbalanced force and moment components. In this paper, a method is proposed to solve this problem. A pressure distribution on the hydro model is mapped on the structural model through projection, and force and moment imbalances on the structural model are eliminated through optimization of the nodal forces on the structural model. Moreover, a viscous force distribution along the center of each member of the hydro model is transferred to the nodal forces on the structural model based on the minimum distance measure with resolving any force and moment imbalance. Examples are presented to demonstrate the validity of the proposed method.     

In search of computer-aided social support in non-communicable diseases care

Non-communicable diseases burden is well-known and care for these diseases goes beyond patients’ engagement, extending to their family, friends, and acquaintances. The ability of social relations in alleviating the harmful effects of health risks is known as social support. Computing can be used to promote social support to enhance the care of non-communicable diseases. However, it is unclear how computing obtains such enhancement. This paper presents a systematic review, in the form of a mapping study, aiming to answer how computing enhances non-communicable diseases care by using social data and by promoting social support. It also looks for available computing models focused on social support promotion in non-communicable diseases care. The study was guided by a two-phase process review, resulting in 38 reviewed papers from journals, conferences, and chapters in the period from 2010 to 2016. In general, the reviewed papers focus on controlled trials, frameworks and systems, knowledge discovery, simulation models or social media usage analysis. Knowledge discovery was the predominant subject, followed by social media usage analysis, and frameworks and systems.     

Advanced Adaptive Sonar for Mapping Applications

An advanced adaptive sonar module is described, capable of being configured to different circumstances and distances according to reflectors found in the environment. Thanks to the sensory distribution, it is possible to identify three basic types of reflector (planes, edges and corners). Furthermore, a heuristic map of the environment is built. The proposed methods have been computationally optimized, and implemented in a real-time system based on a Field-Programmable Gate Array (FPGA) and a Digital Signal Processor (DSP). Results have been obtained in the detection, classification and mapping of obstacles; and finally testing has been carried out on a commercial vehicle.