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The basic theories and architectures of conditional access system ,IPTV as well as IP set-top box are introduced in this paper.

在IPTV平台上集成有条件接收系统将会保护IPTV内容提供商的合法权益，也是实现其产业化的前提条件。

It requires a subscription and IPTV set-top box, and offers key advantages over existing TV cable and satellite technologies.

它需要订购和IPTV机顶盒，并提供关键的优势，现有的有线电视和卫星电视的技术。

The TV is capable of receiving advanced digital cable services such as VOD without a set-top box.

这种电视能接受先进的数字有线服务，譬如无机顶盒的视频点播。

Applicable in modem, set-top box, and other office

适用于调制解调器，机顶盒和其它

The structure and application of an improved box style mixer settler in vanadium extraction are introduced.

介绍了一种改进型箱式混合澄清器的结构特点及其在提钒新工艺萃取过程中的应用情况。

Bless you: New Year's down, as always, the two together, three homes, four singing, Wufu quick succession 66 Shun Yi, seven-up to financial, P Plus Box, 99 good luck, very happy!

祝福您：新年大吉，一如既往，二人同心，三口之家，四季欢唱，五福临门，六六顺意，七喜来财，八方鸿运，九九吉祥，十分美满！

Shadow box is a good way to keep fit.

打太极拳是很好的健身运动。

It is said that all Chinese people can shadow box, isn't it?

听说 中国人都会打太极拳，是吗？

Little 5th grade shadow box project of that book one of my girls did.

我的一个女儿为这本书做了一个小小的五级展示柜。

Tink said that the shadow was in the big box.

叮叮铃说，影子是在那只大箱子里，她指的是那只带抽屉的柜子。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。