through-the-earth communication

In the end, sound waves Through-the-Earth communication system is simulated.

最后对透地通信系统进行了仿真。

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In this theme, the modulation scheme of the low-frequency elastic wave through-the-earth communication system and the realization related to the system for hardware and software is a great platform for the further work. The result provides available experience in future to use the technique.

本文介绍的低频弹性波透地通信的调制方案以及相关的软硬件实现，为后续的研究工作做了一个铺垫，提供了一定的借鉴经验。

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A Realizing Scheme of Mine Through-the-earth Communication System with Digitization

一种数字化矿井透地通信系统实现方案

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The transmission characteristic of the radio wave in complex medium of the stratum is analyzed and researched in this subject, which provide the theoretic basis for design of the through-the-earth communication system for Mine.

本课题基于煤矿安全的无线电透地通信系统设计，分析和研究无线电波在大地复杂媒质中的传播特性。

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With the development of science and technology, the applied range of sound wave Through-the-Earth communication system will become wider and wider, after Through-the-Earth communication system technology getting matured.

随着技术的发展，当声波透地通信技术成熟后，声波透地通信的应用范围会越来越广。

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Abstract: The VLF Through-the-Earth Communication system is recognized as the most reliable way of conveying dispatching information due to its special transmission media.

文摘：由于大地信道稳定，低频透地通信被认为是最可靠的救急通信方式。

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Through analysing DICOM protocol model and utilizing TCP/ IP protocol, this paper discusses how to implement digital imaging communication in medicine. Besides, an application program corresponding to DICOM is compiled.

通过分析DICOM协议模型和利用TCP/IP协议，本文阐述了如何实现医学图像传输服务，并在实际中将其加以运用，编写了相应的DICOM网络应用程序。

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The conclusion obtained can provide theory basis for the design of the through-the-earth radio communication system. Besides, it can provide the experiences for other non-free spaces such as underground buildings and tunnel etc and it involves some theoretic value and practice significance.

所得的结论为矿井透地通信系统的设计提供一定的理论支持，且能为地下建筑及隧道等非自由空间中的通信提供借鉴，具有一定的实际意义。

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Creating a totally new communication experience through a medium characterized by new media technology.

以新媒体技术为特点的传播媒介给人们的沟通营造了一种全新的体验。

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But these issues to regional science and technology through several rooms, school libraries access to a lot of communication of relevant information was eventually overcome.

但这些问题通过多次前往自治区科技厅、学校图书馆沟通查阅大量相关资料最终被作者克服。

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Once participants are immersed, adventure becomes a powerful vehicle for taking a group's pulse, breaking through stale assumptions, identifying barriers to communication, cooperation and effectiveness, and opening minds to new ideas, roles and possibilities.

一旦参与者都专心投入活动之中，历险活动便成为了解团队，打破陈腐观念的有效工具，能够明确指出沟通合作的障碍，效率低落的原因，还能敞开心胸接受新观念、新角色和新的可能性。

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Based on this layered survivability model, this paper does summary designs for service request registration and communication interface of same layer, and carries through a feasibility analysis and functionality verification by using a Markov state transferring model.

在该模型下，对服务请求注册和同层次的通信接口进行了概要设计，并运用马尔科夫状态转移模型对服务系统的多态迁移进行了可行性分析和功能性验证。

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The theme mainly focused on the problem how to apply Orthogonal Frequency Division Multiplexing modulation technology to the low-frequency elastic wave through-the-earth communication system which takes the layered earth for transmission medium.

本课题研究的是把正交频分复用调制技术应用在以分层大地为传输媒介的低频弹性波透地通信系统中。

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In the low-frequency elastic wave through-the-earth communication system, severe Inter-Symbol Interference ( ISI) is generated and the bit error rate ( BER) is increased after transmission because of the multipath transmission caused by the characteristics of the layered earth.

在低频弹性波透地通信系统中，由于分层大地信道的多径传输特性，弹性波信号经过信道传输以后，产生了严重的码间干扰，增加了通信的误码率。

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The Research of Sound Waves Through-The-Earth Communication Correlation Technique Based on OFDM

基于OFDM的声波透地通信相关技术的研究

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