汽车主模型ABS轻量化后地板检测模块的设计制造研究

后地板检测模块在燃油车与电动车内饰切换时拆卸频繁,为操作方便,需将后地板模块轻量化。而传统铝制模块密度大,质量易超标,因此,有必要采用轻量化材料如丙烯腈-丁二烯-苯乙烯共聚物(ABS)塑料来制备后地板检测模块。ABS材料密度小,成本低,但硬度低,强度弱,表面光洁度差。为解决这些问题,采用铝制骨架与ABS模块喷漆相结合的设计方式,通过设计阶段的强度计算,确定了质量轻、强度与表面质量均满足要求的后地板检测模块的设计方法。     

汽车前端框架轻量化进展

简要回顾了汽车前端框架设计方案轻量化的演变历史,基于前端框架设计指标、虚拟仿真和材料方案三个方面轻量化现状的详细描述,论证了前端框架日趋精益轻量化的趋势。     

Compressive behaviour of thin catalyst layers. Part II - Model development and validation

In the second part of this study, a new analytical model for catalyst layers (CLs) compression is developed using effective medium theory, using a geometric “unit cell”, to accurately predict the deformation of CLs under compression. Based on SEM images, a representative unit cell is proposed using microstructural properties of CL such as porosity, pore size distribution, and ionomer to carbon weight ratio (I/C) to simplify the random complex structure of CLs. Deformation of the ionomer film that covers carbon agglomerates is found to be the main deformation compared to other mechanisms such as Hertzian compliance of carbon particles and deformation of agglomerates. The present model is validated using the experimental results obtained for five different CL designs, presented in Part 1 of this study. The analytical model is capable of predicting the non-linear compressive behaviour of CLs with a reasonable accuracy since a continuous change of CL porosity is considered in the model. The proposed geometrical model has also been used for other properties of CL in our group and successfully predicted thermal conductivity and gas diffusivity of CL.     

大功率绝缘门极双极晶体管的特性分析与实际应用

关于该种晶体管的结构、特性、使用方法和它在单相逆变器或直流斩波器中作为功率开关的系统组成，本文均逐一作了阐述，并对配存该晶体管的几种电路的应用条件给予了评价。结合实践，还指出了该晶体管在使用时应注意的几个问题。     

PLC在马钢二铁3#高炉中的应用

将PLC引入高炉自动化控制,重点介绍了西门子ST-300PLC系统的硬件结构,网络构成及软件设计.     

美国密歇根大学生命科学综合体

密歇根大学生命科学综合体是文丘里·斯科特·布朗及合伙人事务所的近作,文章从规划设计与建筑设计两个方面对其进行了分析与阐述。     

Johnson楼控系统DDC程序的编写实践

本文简述了美国江森楼控系统,并重点介绍了如何运用江森楼控系统图形模块化的编程软件MetasysCCT编制楼控系统中的空调机组DDC控制程序。最后总结MetasysCCT图形模块化编程语言的特点。     

The implementation of IEEE 802.16m protocol module for ns-3 simulator

This paper presents the first IEEE 802.16m medium access control (MAC) protocol module embedded in the network simulator version 3 (ns-3). The designed module provides a validation tool for researchers to verify simulated results related to the IEEE 802.16m. This module supports the basic MAC functions which includes an initial ranging (IR) function; four types of bandwidth request (BR) procedures; five types of standard-specified quality-of-service (QoS); a QoS-based transmission scheduler; an adaptive modulation and coding (AMC) selection function; a physical (PHY) layer with a channel propagation model. The designed module provides modification flexibility to adapt to other simulation modules. Various scenarios are simulated to show the capacity of the implemented IEEE 802.16m module in details. Results of different types of traffic are tested with the path loss effect on transmission to visualize the numeric capability of the module.     

Design and setup of a testing device to investigate a reduced sized attachment system mock up for the ITER EU HCPB-TBM under different mechanical loading conditions

In order to determine the forces acting on the EU-Helium Cooled Pebble Bed Test Blanket Module (HCPB-TBM) during operation, a measurement system is developed. Therefore, two force reconstruction (FR) methods using measured strain signals are selected that are suitable for the application to the TBM. The first one, the augmented Kalman filter is a combined deterministic-stochastic approach. A second FR method based on the concept of a model predictive controller is proposed in this paper, which uses an optimization algorithm. In order to test the selected methods a testing device has been built which can be used to apply different force excitations on a reduced sized TBM mock up and measure the resulting strain signals of 16 strain gages. A simple tube mock up has been designed and manufactured to test and calibrate the FR algorithms. In addition, a second TBM mock up with attachment system is described. Finally, first results of the FR of a worst-case test case from simulated strain data of the simple tube mock up are presented.     

基于.NET的设备管理系统的设计与实现

.NET平台是应用非常广泛的平台,文中结合SQL Server2005数据库来开发某高职院校的设备管理信息系统.系统的运行,极大的提高了设备管理工作的质量和效益,减少差错,减轻劳动强度,从而提高学校的整体管理水平.