电力线

Home network; power line carrier wave; orthogonal frequency division multiplexing; digital signal processor

家居网络；电力线载波；正交频分多路复用；数字信号处理器

Hence only one line of force can pass through each point of the field.

因此电场中任一点只能通过一条电力线。

First, the basic principles of power line communication and spread spectrum are introduced.

论文首先介绍了电力线载波通信和扩频技术的基本原理。

In order to solve the problem of interference of power line, the spread spectrum technology is used in the system.

同时，SSC的引入较好地解决了电力线的干扰问题。

The assistive communication developed by this project consists of head, eye, brain wave, hand language, speech, lip language, mouth, Morse code, The environmental control includes home appliances, door, window, security, Internet, multimedia by using the communication media such as infrared, radio, power line, and phone line.

本整合计划有六个子计划分成四组(职治组、人机组、特教组、科技组)来进行辅具开发的合作，其中辅助沟通包含头部、眼晴、脑波、手语、语音、唇语、嘴巴、摩斯码；而环境控制则包含家电、门窗、保全、网页、多媒体等，所使用的通讯介面有红外线、无线电、电力线、电话线。

Therefore, there is a wide foreground for the study and application of low-voltage power line communication technology.

因此，研究、开发和应用低压电力线载波通信技术具有非常重大的意义和十分广阔的前景。

Show to list the word carrier machine and simulated carrier machine of entire quantity on transmission capacity comparison.

全数字电力线载波机在占用4kHz线路频带不变的前提下，成倍地扩展了传输容量。

The hardware of master and terminal are developed while emphasis is placed on power line communication module.

第五章在分析现有的几种电力线载波通信协议的基础上，参照OSI模型设计了照明控制系统的通信协议。

The ELF magnetic field generated by a video terminal measures only a few milligauss, or about one-hundredth the strength of the earth's own magnetic field, The electric fields surrounding a power line can be as high as 10 kilovolts per meter, but the corresponding field induced in human cells will be only about 1 millivolt per meter.

测量视屏终端产生的 ELF 磁场只有几毫 GAUSS ，或只有地球本身的百分之一，电力线周围的电场能达10K 伏每米但相应的场作用于人的细胞只有1毫伏每米。

Besides, a model of power line transceiver is also introduced in the thesis.

另外，本文还提出了一个电力线载波收发器在软、硬件上的实现模型。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。