Information space of sensor networks: Lagrangian,energy-momentum tensor,and applications

It is a challenge to investigate the interrelationship between the geometric structure and performance of sensor networks due to the increasingly complex and diverse architecture of them. This paper presents two new formulations for the information space of sensor networks, including Lagrangian and energy–momentum tensor, which are expected to integrate sensor networks target tracking and performance evaluation from a unified perspective. The proposed method presents two geometric objects to represent the dynamic state and manifold structure of the information space of sensor networks. Based on that, the authors conduct the property analysis and target tracking of sensor networks. To the best of our knowledge, it is the first time to investigate and analyze the information energy–momentum tensor of sensor networks and evaluate the performance of sensor networks in the context of target tracking. Simulations and examples confirm the competitive performance of the proposed method.     

YH－F1仿真系统中的信息管理子系统

ＹＨ－Ｆ１仿真系统中的信息管理子系统，为ＹＨ－Ｆ１仿真系统增加了汉化功能。其优点在于对仿真试验的输入输出信息全面管理，运载火箭控制系统仿真试验证实了该子系统的仿真效果。     

基于信息管理与融合技术在目标类型识别上的研究

在系统模型的基础上结合实战提出影响目标飞机类型识别的证据,并按照影响程度进行优先权排序;结合数据库,提出证据概率计算的数学表达式;采用深度优先搜索的融合模式,按照D-S证据理论进行融合计算;在传感器管理模块的作用下,对融合结果进行反馈控制;结合实例,对系统进行仿真验证,证明其可靠有效。     

从图像信息容量和图像功率谱看 CBERS-1卫星图像

文章从信息容量和图像功率谱这两个方面评价了CBERS-1的图像质量。并通过将同一地区的CBERS-1图像和TM图像进行比较,客现反映了CBERS-1卫星的图像质量。实验结果表明CBERS-1图像在信息丰富程度和图像综合的纹理特征上与TM图像质量相当,具有很好的可比性。     

国际空间站日本舱信息系统早期设计分析

文章基于国际空间站日本实验舱早期总体定义阶段的活动研究成果，概述了日本实验舱信息系统的结构、通信链路环境、系统基本组成要素，并详细介绍了信息系统的需求、功能、子系统、硬件架构、软件结构以及与美国舱信息接口等关键点。最后总结分析了日本实验舱信息系统的典型特点，包括通信链路备份、核心网络与有效栽荷网络相互独立、数据传输线路优化、分层控制体系、光技术应用、CCSDS标准应用、软件分层模块化设计等。     

Clicks,whistles and pulses: Passive and active signal use in dolphin communication

The search for signals out of noise is a problem not only with radio signals from the sky but in the study of animal communication. Dolphins use multiple modalities to communicate including body postures, touch, vision, and most elaborately sound. Like SETI radio signal searches, dolphin sound analysis includes the detection, recognition, analysis, and interpretation of signals. Dolphins use both passive listening and active production to communicate. Dolphins use three main types of acoustic signals: frequency modulated whistles (narrowband with harmonics), echolocation (broadband clicks) and burst pulsed sounds (packets of closely spaced broadband clicks). Dolphin sound analysis has focused on frequency-modulated whistles, yet the most commonly used signals are burst-pulsed sounds which, due to their graded and overlapping nature and bimodal inter-click interval (ICI) rates are hard to categorize. We will look at: 1) the mechanism of sound production and categories of sound types, 2) sound analysis techniques and information content, and 3) examples of lessons learned in the study of dolphin acoustics. The goal of this paper is to provide perspective on how animal communication studies might provide insight to both passive and active SETI in the larger context of searching for life signatures.     

Robustness evaluation method for unmanned aerial vehicle swarms based on complex network theory

Unmanned Aerial Vehicle (UAV) swarms have been foreseen to play an important role in military applications in the future, wherein they will be frequently subjected to different disturbances and destructions such as attacks and equipment faults. Therefore, a sophisticated robustness evaluation mechanism is of considerable importance for the reliable functioning of the UAV swarms. However, their complex characteristics and irregular dynamic evolution make them extremely challenging and uncertain to evaluate the robustness of such a system. In this paper, a complex network theory-based robustness evaluation method for a UAV swarming system is proposed. This method takes into account the dynamic evolution of UAV swarms, including dynamic reconfiguration and information correlation. The paper analyzes and models the aforementioned dynamic evolution and establishes a comprehensive robustness metric and two evaluation strategies. The robustness evaluation method and algorithms considering dynamic reconfiguration and information correlation are developed. Finally, the validity of the proposed method is verified by conducting a case study analysis. The results can further provide some guidance and reference for the robust design, mission planning and decision-making of UAV swarms.     

我国航空情报服务向航空信息管理方向发展探索

AIM是近年来国际民航界提出的一个新的航空信息管理的概念,它包含一系列航空信息服务的理论、目标和方法。本文通过对AIM的核心内容、目标和技术实现进行分析,提出了我国航空情报的发展方向。     

信息论视角下的翻译研究

本文主要探讨了描写翻译研究的一种研究方法，即翻译研究的信息论方法。文章概述了信息论方法的概念，并尝试利用信息论的研究成果来解决翻译中的冗余、翻译标准以及机器翻译等问题。     

对陕西农业信息市场建设的思考

农业信息市场的建立和完善对促进陕西农业经济发展具有重要的作用,也是增加农民收入、减少坑农害农的重要手段。转变思想、树立信息战略资源观念;加大政府投入;强化农业信息人员配置;创新信息传播载体和激励机制是建立陕西农业信息市场的有效措施。