透地通信系统的现状和主流技术分析

简要回顾了透地通信系统的发展历史,介绍了当前国内外透地通信系统的研究现状、使用效果,分析了当前主流的透地通信技术,展望了透地通信技术在煤矿的应用前景和可能的发展方向。     

Semantic Interoperability Aggregation in Service Requirements Refinement

Semantic refinement of stakeholders’ requirements is a fundamental issue in requirements engineering. Facing with the on-demand collaboration problem among the heterogeneous, autonomous, and dynamic service resources in the Web, service requirements refinement becomes extremely important, and the key issue in service requirements refinement is semantic interoperability aggregation. A method for creating connecting ontologies driven by requirement sign ontology is proposed. Based on connecting ontologies, a ...     

基于钢轨的应急通信系统设计

针对煤矿、在建隧道坍塌后通信中断、内外失联的问题,设计了基于钢轨的应急通信系统。该系统采用单片机控制产生振动信号,通过未彻底损坏的钢轨传输信号,并采用振动传感器拾取信号,最终实现应急通信。实验结果表明,该系统可以有效地实现信息的传递,能够达到灾后救援应急通信的目的。     

基于信息技术的赛博空间对抗研究

伴随着信息技术的不断扩展与相互融合,新兴的赛博空间军备竞赛形势也随之加剧。世界各个大国都在逐步推进与赛博空间有关的技术的研究与发展,以期在赛博空间秩序维护与规则的制定上占有主导权与话语权。文中全面介绍了赛博空间的概念,并且系统阐述了赛博空间对抗的组成、特点与内涵,具体剖析了与之相关的关键技术。通过分析了解到赛博空间的最新技术要求与发展创新趋势,希望对我国在新兴赛博空间领域的技术发展与认识有所启示。     

煤矿应急通信保障系统的设计

提出了一种煤矿应急通信保障系统的设计方案。该系统的核心即应急救援软件平台通过中继网关、专用转换器等设备整合井下扩播电话机、小灵通、WiFi手机、调度电话机、井下广播系统,从而实现各通信系统间的互联互通;该系统通过应急救援软件平台实现与矿井人员定位系统的互联互通、与矿井工业以太网的综合接入。实际测试结果表明,该系统具有线路管理、音频播放、一键通、广播及应急通信救援等功能,提高了应急救援工作的效率。     

现代化矿井通信技术与系统

提出了由矿用有线调度通信系统、矿井移动通信系统、矿井广播通信系统和矿井救灾通信系统等组成的煤矿井下通信技术体系。提出矿用调度通信系统应采用矿用有线调度通信系统。提出全矿井移动通信系统宜采用WiFi、3G、4G等通信技术。提出矿井广播通信系统既可采用矿用有线调度通信系统远程供电广播技术,也可采用基于以太环网和无源光网络的IP通信技术。提出矿井救灾通信系统应采用无线多媒体通信技术,宜采用WiFi和MESH等通信技术。提出矿井移动通信系统应满足手机脱网通信、基站脱网通信、无线自组织网络、接入煤矿井下有线宽带传输平台等要求。指出在手机脱网通信、接入煤矿井下有线宽带传输平台、无线自组织网络、矿用无线摄像机、基站脱网通信、多功能矿井移动通信系统、矿井无线宽带传输等方面,WiFi优于WCDMA、CDMA2000和TD-SCDMA。提出多功能矿井移动通信系统和矿井无线宽带传输宜采用WiFi。     

Job task characteristics of Australian emergency services volunteers during search and rescue operations

Search and rescue operations are necessary in locating, assisting and recovering individuals lost or in distress. In Australia, land-based search and rescue roles require a range of physically demanding tasks undertaken in dynamic and challenging environments. The aim of the current research was to identify and characterise the physically demanding tasks inherent to search and rescue operation personnel within Australia. These aims were met through a subjective job task analysis approach. In total, 11 criterion tasks were identified by personnel. These tasks were the most physically demanding, frequently occurring and operationally important tasks to these specialist roles. Muscular strength was the dominant fitness component for 7 of the 11 tasks. In addition to the discrete criterion tasks, an operational scenario was established. With the tasks and operational scenario identified, objective task analysis procedures can be undertaken so that practitioners can implement evidence-based strategies, such as physical selection procedures and task-based physical training programs, commensurate with the physical demands of search and rescue job roles.

Practitioner Summary: The identification of physically demanding tasks amongst specialist emergency service roles predicates health and safety strategies which can be incorporated into organisations. Knowledge of physical task parameters allows employers to mitigate injury risk through the implementation of strategies modelled on the precise physical demands of the role.     

矿用数字广播救援引导系统的设计

为解决煤矿井下灾害救援时通信信息不畅的问题,设计了一种新型的矿用数字广播救援引导系统,介绍了系统关键技术、主要装备及特点。该系统采用IP网络通信、多媒体处理、数字广播通信等技术,为煤矿井下危险区域人员紧急疏散及撤离、地面远程指挥管理决策、救援通信与逃生引导等工作提供了针对性的实时信息与技术保障,提高了矿井应对突发情况的能力。     

On the practicalities of place-based virtual communities: Ontology-based querying,application architecture,and performance

While the Internet has allowed geographical boundaries to be transcended, with the increasing use of the mobile Internet, there is a shift towards a focus on locality and place-specific applications. This paper proposes a novel approach for constructing context-aware mobile services for a place using a commonly shared knowledge base, that captures not only static but dynamic aspects of a place. The approach is based on a conceptual model of a Place-Based Virtual Community (PBVC), represented using an ontology; a PBVC for a place augments the place with context-aware services based on querying an ontology. We present an implementation of a framework based on the ontology and an evaluation of the performance of queries over the ontology. We also illustrate architectures of specific applications as specialisation of a generic PlaceComm architecture.     

基于Mesh技术的矿井应急救灾通信系统设计研究

针对矿井应急通信系统存在的呼吸器影响语音清晰度、缺少视频信息、缺少环境参数监测和传输功能等问题,提出了一种基于无线Mesh技术的矿井应急救灾通信系统设计方案,简要介绍了无线Mesh的基本原理及结构,给出了矿井应急救灾通信系统的组网方式、整体架构和主要设备的设计方案,详细阐述了网络服务质量的保证、无线Mesh网络的动态路由选择、业务准入与控制和音视频流无缝移动传输等关键技术难题及解决办法。实际应用表明,该系统能同时实现井上指挥中心、井下指挥中心和井下救护人员之间的语音和视频通信功能,并能在井上和井下指挥中心实时显示救灾现场的环境参数。     

A Dynamic Foundational Architecture for Semantic Web Services

The combination of Web services and ontologies is gaining momentum as the potential silver bullets for tomorrows Web, i.e., the Semantic Web. We propose an architectural foundation for managing semantic Web services in dynamic environments. We introduce the concept of community to cater for an ontological organization of Web services. We develop an ontology called community ontology that serves as a template for describing communities of Web services. We also propose a peer-to-peer approach for managing communities in dynamic environments.     

赛博空间态势感知技术研究

文章从赛博空间的概念和态势感知的流程出发,构建赛博空间态势感知框架,以安全栓测和安全事件分析技术为支撑,提出多层次多角度的态势评估模型,在此基础上使用时间序列分析方法预测安全态势的发展趋势。     

网络安全态势感知研究进展

首先指出了网络安全态势感知研究的必要性,介绍了网络安全态势感知的概念、含义和主要任务;其次,详细阐述了网络安全态势感知国内外的研究现状和涉及到的关键技术;最后,总结和展望了网络安全态势感知当前存在的难题和今后的研究方向。