Dual ISM band printed antenna with omnidirectional radiation pattern and better radiation efficiency

Designing a high gain planar antenna on the low‐cost FR4 substrate is one of the major challenging tasks for the researchers. The omnidirectional radiation pattern is desired for 360° coverage. Both of these requirements have been addressed in this article. This article presents a dual band printed antenna designed on an FR4 substrate of 1.6 mm thickness. The proposed antenna operates in the ISM band of 2.4 and 5.8 GHz for the application of dual‐band WLAN/WIFI. The proposed antenna consists of a circular patch and ring‐shaped ground plane. The overall dimension of the antenna is 66 × 66 × 1.6 mm³. Excellent impedance matching and radiation efficiency for both the bands have been achieved. The proposed antenna shows omnidirectional radiation pattern at 2.4 GHz ISM band and nearly omnidirectional pattern along with high gain of 4.7 dBi at 5.8 GHz ISM band.     

ISM与4G网络融合的无线热计量云系统设计与实现

针对我国建筑能耗监测系统中热计量数据远程采集难度大,建筑内部近距离计量节点部署不灵活等问题,将ISM无线网络技术和4G网络技术相融合应用于热计量数据的采集、转换、传输和处理过程中,对ISM网络热计量节点有效组网方式和4G网络数据传输转换方法进行了研究,构建了ISM与4G网络融合的无线热计量系统,提出了一种基于云服务器的远程热计量数据采集平台,并在后期实践中验证了系统功能的可靠性。研究结果表明,使用ISM网络可以方便灵活地对建筑内部热计量节点进行近距离数据采集,降低线路铺设改造成本,结合4G网络和云服务器TCP/IP技术进行远程数据传输与处理可以高效地对热计量数据在云端进行集中实时优化管理,同时也为多种类型的远程热计量数据应用提供了一种解决方案。     

Establishing an Integrated Process Management System (IPMS) in ship management companies

This paper motivates on redesigning the traditional management style of global shipping firms in order to originally establish an Integrated Process Management System (IPMS) on the basis of quality aspects, environmental concerns, and occupational health and safety requirements. The requirements of ISO 9001:2000, ISO 14001:2004, and OHSAS 18001:2007 are comparatively assessed with respect to International Safety Management (ISM) Code clauses via using Fuzzy Axiomatic Design (FAD) while Analytic Network Process (ANP) enables to identify critical managerial processes of shipping business. Consequently, the fundamental structure of IPMS is proposed based on the quantitative outcomes of FAD and ANP approaches. In practice, the IPMS can be adopted into shore-based organizations in accordance with the prior principles of ship management companies.     

An SRR based miniature implantable antenna with a slit loaded ground at MedRadio and ISM bands for biotelemetry applications

A miniaturized implantable microstrip split‐ring antenna (IMSRA) is proposed for wireless biotelemetry. The IMSRA takes up a miniaturized volume of 153.35 mm³ (10.5 × 11.5 × 1.27) and provides a dual‐band operation in 360 to 620 MHz and 2.32 to 2.54 GHz that covers The Medical Device Radiocommunications Service (MedRadio) (401‐406 MHz) and Industrial, Scientific, and Medical (ISM) (433‐434 MHz and 2.4‐2.48 GHz) bands. The principal part of the radiator consists of three homocentric split‐ring elements. In addition, three conductor paths located between the split rings are used for precise adjustment of the frequency. In order to reduce the antenna size, a shorting pin is appropriately inserted between one of the metallic rings and the ground plane. The impedance matching of the antenna is improved by the use of a hook‐shaped slit placed on the ground plane. For verification of the in vivo operation, the proposed IMSRA was measured in two separate skin‐mimicking gels for MedRadio and ISM bands. A prototype was also tested in the skin tissue sample of a donor rat. The proposed antenna offers 53% (360 ~ 620 MHz) bandwidth at 490 MHz and 9% (2.32 ~ 2.54 GHz) bandwidth at 2.43 GHz. The IMSRA exhibits well‐behaved radiation patterns and SAR values at the respective bands.     

基于ISM的信息化推动工业化影响因素分析

从信息化推动工业化发展的现状出发,应用解释结构模型法（IsM）,得到信息化推动工业化发展影响因素的三级递阶模型,提炼出信息技术创新、资源节约和设备信息化改造是信息化推动工业化发展的直接影响因素,并从鼓励信息技术创新、节能减排和设备的智能化、数字化和网络化改造等方面提出具体对策。     

基于SOPC的射频模块控制器的设计

针对ISM射频模块UTC-903SE,提出一种基于嵌入式软核的设计方法,在FPGA片上系统中构建出UTC-903SE控制器IP核以及嵌入式处理器Nios II软核。通过FPGA控制无线射频模块,可以实现数据的无线收发,并具有实时性,为需要远距离采集数据的场合提供了方便快捷的方法。     

基于轮式机器人的实时3D栅格地图构建

移动机器人在各种任务中需要进行建图、定位和路径规划，但是目前的视觉SLAM只能输出相机的运动轨迹图，而不能生成用于路径规划和导航的地图。因此，在ORB_SLAM2的基础上，与RGB-D相机相结合，提出了一种实时3D栅格地图构建算法。建立了一个逆传感器模型（Inverse Sensor Model，ISM）；针对ISM模型，重新构建了3D栅格地图的算法；联合ORB_SLAM2进行数据集实验、仿真环境实验和实时构建实验。经实验验证，该算法能够利用ORB_SLAM2实时构建出具有尺度的3D栅格地图，且能够清晰地显示障碍物位置，验证了该算法的有效性。     

基于ISM-ANP的绿色包装灰色评价模型研究

目的 对绿色包装设计方案进行多维度综合评价,提供具体的包装优化依据,解决过度包装、废弃包装带来的环境问题。方法 首先建立涵盖环境、产品性能、创新性、经济性、用户体验感五大属性的评价指标体系,以ISM分析指标之间的内在关联情况并利用ANP确定权重值;其次通过灰色模糊评价对包装等级进行划分;最后以综合评价方法求得包装的绿色度评分。结果 将指标权重值与传统AHP方法得出的结果进行比较,发现本研究模型更科学合理。以一项小麦壳制保鲜包装设计为例,运用该综合评价模型进行运算后得出该方案评价值为5.043,再根据指标的得分数据有针对性地提出包装优化方向。结论 研究模型适用于各类绿色包装设计方案的筛选与优化,有助于包装设计与生产相关人员进行决策,引导我国包装行业更好地向绿色模式转变。     

关于Bluetooth跳频序列的研究

根据工作环境和性能要求, Bluetooth采用了跳频技术作为接入方式.针对Bluetooth跳频系统中跳频序列的产生问题做了分析,并提出了改进的方案.     

Interpretive structural modelling of risk sources in a virtual organisation

Speedier network decision making together with shorter time to bring items to market together with lower network operating costs all result from enhanced knowledge sharing. In addition reuse of enterprise and network knowledge resulting from improved capture means that any risk of repeating earlier project work is limited, repetition of past mistakes is reduced. Decisions are made with greater awareness of any risks involved and therefore there is likely to be a reduction in costs arising from faulty decisions and failed collaborations. While there are many advantages attached to the use of virtual organisations (VOs) there are also challenges, including risks that have become apparent through undertaking a review of the literature. In total 13 sources of risk were found stemming from the network related risks in a VO, where the emphasis of the study was placed. This paper contains a thorough study that will identify these threats as well as gaining a sound understanding of them by examining them one by one as they have been identified by the literature and previous studies. Subsequently, their relative importance will be analysed through the use of interpretive structural modelling (ISM) using information gathered in a questionnaire.