全球品牌标签领导者——艾利丹尼森RFID标签应用案例介绍

艾利丹尼森打印系统部是全球最大的条码打印机和RFID标签生产商之一,一直引领条码应用科技。本文介绍了艾利丹尼森公司RFID应用的一些案例。     

荧光原位杂交技术在活性污泥菌群识别中的研究进展

荧光原位杂交技术(FISH)广泛地应用于分析环境微生物的群落组成,能够同时对微生物进行定性、定量分析,并确定微生物群落空间分布情况.本文阐述了FISH法应用于活性污泥处理系统的重要作用,综述了FISH法在活性污泥及生物膜微生物菌群的组成、结构与功能的研究和应用,同时讨论了其在应用中存在的不足,并在此基础上总结了一系列可...     

一种新型2．4GHz频带RFID抗金属标签天线

设计了一款能应用于金属货物识别的新型标签天线--准八木标签天线.基于折合振子和错位阵列技术,并使用高介电常数的介质基材,使天线的厚度限制在0.024λ,从而满足标签天线尺寸的要求.经实测验证,新型天线贴附在金属物体表面时,能达到5dBi的增益.     

基于BP神经网络的智能轮胎标签仿真研究

轮胎中植入的RFID标签,可以长时间的很好的存储轮胎的型号、胎压、出厂日期等信息。RFID标签在空气中的阅读距离可以达到很大的距离,但是一旦植入轮胎中,很容易受到轮胎中的金属层和炭黑等电介质的影响,导致读取距离下降。所以,需要寻找合适的方法来预测不同RFID标签情况下的阅读器读取距离,就显得尤为重要了。 为了更加快捷方便的研究两者之间的关系,在天线长度、轮胎的介电常数、与钢丝层的距离都变化的情况下,利用FEKO电磁仿真软件建立了不同情况下的天线,并仿真得到反射系数S_11,然后利用弗林斯传输方程（Friis）计算得到仿真读取距离。MATLAB中有可供调用的神经网络工具箱,利用MATLAB强大的数据处理能力,建立BP神经网络预测模型,从而建立起标签天线长度、轮胎中标签与钢丝层的距离、轮胎介电常数和已得到的仿真读取距离之间的BP神经网络模型。实际测量值与训练后得到的预测仿真值在误差允许的范围内可以认定为实际测量距离。 因此,可以通过建立BP神经网络模型的方法,快速方便的在一定精度范围内预测阅读器的阅读距离。     

Low power wide gates for modern power efficient processors

In this paper, a low power register file and tag comparator is proposed which has lower leakage and higher noise immunity without dramatic speed degradation due to the wide fan-in gates. Simulation of register files and tag comparators designed is done using low-V_th 90 nm CMOS process technology model in all process corners. The results demonstrate 20% power reduction and 2× noise-immunity improvement in the implemented register file using the proposed circuit at the same delay compared to the standard domino circuits. On the other hand, simulation of tag comparators implemented using the other proposed circuit shows 41%, 22% and 7.5% reduction in power, delay and area, respectively compared to the standard footless domino at the same robustness condition. Moreover, the register file and the tag comparator designed with the proposed circuits respectively show 2.48 and 3 times improvement in the defined figure of merit compared to the counterpart circuits designed with the conventional domino circuit. Thus, the proposed are power efficient and suitable approaches for embedded processors with multi-ported register file and fully-associative caches with large number of tag comparators.     

电子专用设备的人性化设计

电子专用设备的品质的完整概念是顾客的满意度。在科技进步日新月异,国际化竞争日趋激烈的今天,我们的设备要提高市场竞争力,就要更全面地理解可用、实用、耐用,更需要注重的是好用、宜人。在设计上遵循人性化才可以拉近人与设备的距离,才可以最大限度地满足操作者的需要,使人操作方便、反应准确、减少差错、提高工作效率,为操作者创造最舒适、方便、安全的工作环境。人性化的设计是一种人文精神的体现,能够达到人与设备的完美和谐,真正体现出对人的尊重和关心。从设计原则和标识等方面着重讨论了电子专用设备的人性化设计。     

适于UHF RFID标签芯片的高性能电源恢复电路

针对ISO 18000-6C标准,提出一种双电压输出稳压电路,有效降低了整体芯片功耗。基于Cadence Spectre设计仿真平台和TSMC 0.18μm CMOS混合信号工艺进行设计并流片。在-20℃～80℃温度范围内,工艺角从ff到ss变化,仿真得到整流电路的能量转换效率(PCE)为29.88%,稳压电路的温度系数为2.4×10-5/℃,电源噪声抑制比(PSRR)为91.4dB@10Hz和34.5dB@10MHz。同时对芯片进行测试,标签可以工作的最低输入射频功率为-9.5dBm,此时整流效率可达23.1%,稳压高低两路电压输出分别稳定在1.8±0.1V和1.0±0.05V,芯片面积约为0.166mm2。     

Adsorptive detagging of poly-histidine tagged protein using hexa-histidine tagged exopeptidase

The ubiquitous use of poly-histidine fusion tags has made the purification of the recombinant target proteins much simpler, although the presence of residual fusion tags can generate immunogenic products or products with changed biological activities. This work presents a generic method of removing poly-histidine fusion tags from recombinant proteins through the use of a hexa-histidine tagged exopeptidase (DAPase) when both tagged species are adsorbed to the immobilized metal affinity chromatography (IMAC) adsorbent. Adsorptive detagging was performed in the presence of 50mM imidazole in order to allow the cleavage reaction by the hexa-histidine tagged DAPase to occur. The progress of batch and adsorptive detagging by DAPase of maltose binding protein (MBP) tagged with two variants of hexa-histidine fusion tag was successfully monitored using cationic exchange chromatography. A single-step, column-based detagging strategy was then optimized to maximize the recovery of native MBP. The kinetics of batch and on-column digestion for both HT6 and HT15 fusion tags were investigated. The process involved the sequential removal of dipeptides during the digestion of full-length fusion protein down to its fully detagged native form. During the course of tag digestion, 4 and 7 different intermediates were detected for HT6 and HT15 tagged MBP respectively. The characteristics of on-column cleavage of poly-histidine fusion tags by DAPase as a function of incubation temperature and amount of protease activity used were examined. It was found that the influence of fusion tag design on the batch and column-based detagging yield and efficiency was substantial. In addition, the structural difference of fusion tags affects the binding strength of the fusion protein, which can influence the resulting product purity. Despite being a longer tag, HT15 fusion tag was the preferred sequence for shortening the time needed for on-column detagging. These results can be applied to the wider use of the proposed platform protocol for the on-column cleavage of poly-histidine tagged proteins using exopeptidases.     

RFID电子门票解决方案(一)

当前,各种展览、体育比赛、演唱会、会议和旅游景区门票种类多种多样,管理混乱,不但给赛会、景区带了经济损失还留下很多安全隐患。盛天和业内首次采用先进的RFID技术、数据库技术、定位技术和呼叫中心等通信和信息安全技术,有效地解决了展览、体育比赛、演唱会、会议场馆、旅游景区门票的头痛问题。本文对目前各种门票和门票管理现状进行介绍,对光盘门票的应用原理、系统结构、系统组成、系统功能、系统安全防御和扩展进行说明,让大家了解光盘门票系统的优势。