Closed-loop PLM for intelligent products in the era of the Internet of things

With the advent of the information and related emerging technologies, such as RFID, small size sensors and sensor networks or, more generally, product embedded information devices (PEID), a new generation of products called smart or intelligent products is available in the market.Although various definitions of intelligent products have been proposed, we introduce a new definition of the notion of Intelligent Product inspired by what happens in nature with us as human beings and the way we develop intelligence and knowledge. We see an intelligent product as a product system which contains sensing, memory, data processing, reasoning and communication capabilities at four intelligence levels. This future generations of Intelligent Products will need new Product Data Technologies allowing the seamless interoperability of systems and exchange of not only Static but of Dynamic Product Data as well. Actual standards for PDT cover only lowest intelligence of today’s products. In this context, we try to shape the actual state and a possible future of the Product Data Technologies from a Closed-Loop Product Lifecycle Management (C-L PLM) perspective.Our approach is founded in recent findings of the FP6 IP 507100 project PROMISE and follow-up research work. Standards of the STEP family, covering the product lifecycle to a certain extend (PLCS) as well as MIMOSA and ISO 15926 are discussed together with more recent technologies for the management of ID and sensor data such as EPCglobal, OGC-SWE and relevant PROMISE propositions for standards.Finally, the first efforts towards ontology based semantic standards for product lifecycle management and associated knowledge management and sharing are presented and discussed.     

基于CL语言的反应釜温度控制方案

针对过程生产温控现状,根据PID调节器的控制特性,结合CL语言的顺控功能,设计了双调节器温控回路,实现了冷、热媒顺利可靠的切换.实践证明,温控准确率达到±1℃,同时从热媒到冷媒的切换时间小于5s,实现了温度的在线控制.     

消雷器静态电场分布及其并行计算

以分析新型防雷装置消雷器静态电场为例 ,提出一种非常适合于多个 CPU并行计算机上实现的并行算法——奇偶并行法。通过算例证实该算法容易实现、效率比较高 ,同时也容易推广至其它数值计算领域。最后给出伞形导体消雷器的静态电场分布 ,并首次提出了判别消雷器设计期间的优劣标准 ,为进一步设计消雷器奠定理论基础。     

基于CL多小波变换和组合位平面理论的秘密信息共享算法

针对信息隐藏算法容量和不可见性与鲁棒性矛盾的特点,提出了一种新的基于Chui-Lian(CL)多小波变换和组合位平面(CBP)理论的数字图像载体预处理算法,并将该算法用于以数字图像为载体的信息隐藏,以实现秘密通信和图像共享。其中,CL多小波变换能够将载体图像划分为4个能量等级不同的最低分辨率子图像,组合位平面理论可将子图像解析为不同的位平面层次,在隐藏秘密信息时,可根据最低分辨率子图和组合位平面的能量等级由高到低分别嵌入鲁棒信息、秘密信息和脆弱信息。实验结果表明,在25%的嵌入率时,与基于离散余弦变换和最低有效位方法的信息隐藏算法（DCT-LSB）、基于离散小波变换和最低有效位方法的信息隐藏算法（DWT-LSB）相比,所提算法针对若干常见攻击的鲁棒性有一定程度提升,峰值信噪比（PSNR）分别提高了37.16%和20.00%。     

化学发光法测定原花青素的研究

本文建立了测定葡萄籽提取物中原花青素的流动注射-抑制化学发光分析方法。利用原花青素还原ClO-,抑制ClO--Luminol体系的化学发光,在碱性条件下,其抑制程度的大小与原花青素的浓度在一定范围内呈现良好的线性关系。该方法线性范围为0.08～19.0μg/ml,检出限为0.06μg/ml,11次测定的RSD为1.2%。本法对样品可直接进行测定,不需特殊处理。     

A practical method to calibrate the slant angle of central X-ray for laminography scanning system

Computed laminography (CL) has a particular function in plate-type structure tomography. For CL reconstruction, slant angle of the central X-ray is an important parameter and must be calibrated accurately. A practical feasible calibration method to determine the slant angle is proposed. According to this method, a spherical phantom is fixed on the rotary table and turns a full 360° rotation. Then, image processing and the least-square fitting are performed to figure out the locus of the projection. Consequently, the slant angle is achieved in accordance with the property of the fitted ellipse. The experimental results prove that this method is easy to implement and meet the inspection requirements.     

Development of an experimentally validated semi-empirical fully-coupled performance model of a PEM electrolysis cell with a 3-D structured porous transport layer

A semi-empirical non-isothermal model incorporating coupled momentum, heat and mass transport phenomena for predicting the performance of a proton exchange membrane (PEM) water electrolysis cell operating without flow channels is presented. Model input parameters such as electro-kinetics properties and mean pore size of the porous transport layer (PTL) were determined by rotating disc electrode and capillary flow porometry, respectively. This is the first report of a semi-empirical fully coupled model which allows one to quantify and investigate the effect of the gas phase and bubble coverage on PEM cell performance up to very high current densities of about 5 A/cm². The mass transport effects are discussed in terms of the operating conditions, design parameters and the microstructure of the PTL. The results show that, the operating temperature and pressure, and the inlet water flowrate and thickness of the PTL are the critical parameters for mitigating mass transport limitation at high current densities. The model presented here can serve as a tool for further development and scale-up effort in the area of PEM water electrolysis, and provide insight during the design stage.     

台达PUTNC-H4CL在镀膜玻璃自动卸片机上的应用

采用台达PUTNC-H4CL通用数控设备，台达ASDAD伺服控制器和EMC-313-10伺服电机，实现了镀膜玻璃自动卸片。达到节省人力，降低劳动强度，保障人工安全，维护方便和节约电能的目的。     

ASTM A668 CL.E材料断口分析

针对ASTM A668 CL.E材料试样出现抗拉强度、伸长率不合格等质量问题,通过扫描电镜分析,判断断口缺陷性质为白点。