carrier n. 1.运送人,搬夫;负荷者;使役,〔美国〕信差,邮递员;送报人;〔英国〕运输行,运输业者。 2.传书鸽,信鸽。 3.(车后的)货架;吊架;托架。 4.水管,引水沟。 5.运载工具;搬运机;移动滑车。 6.【医学】带菌者,病媒。 7.航空母舰。 8.【电学】载波;载流子;【拓】承载子;【化学】载体,填料;导染剂。 a mail [letter] carrier邮递员。 a band carrier传送带。
Obtain damage exception report from carrier forwarder or tally report from tally company to the same effect ; or mark damage exception on the delivery receipt at the time of delivery ; immediately put notice of claim on carrier forwarder within the time limit set out in the contract of carriage 从承运人货代处取得货物损坏遗失报告或从理货公司处取得记载有货物损坏遗失的理货报告或在收货时在收货回单上就损坏遗失情况加以批注
It is necessary in digital communication system that carrier recovery can compensate frequency offset and phase jitter brought by transmission and modulation . this paper is mainly focused on carrier recovery technique . we introduce the channel model at cable headed and receiving site . firstly , we introduce the principle of carrier recovery and give some algorithms of them , which are directed - decision , reduced constellation and frequency sweeping 本论文紧紧围绕着数字通信系统中的载波恢复技术,在介绍了有线通信系统所用的调制解调信道模型后,首先阐述了载波恢复技术的思想和基本原理,在此基础上给出了三种载波恢复算法,即判决导向算法、简化星座判决算法和扫频算法,并且给出了其各自的仿真图:然后深入研究了一种适合高阶qam并且能纠正较大频偏的载波恢复技术:极性判决算法。
The four chapter discusses the employment of the right to cancellation of contract provided by contract law under charter party . the last chapter discusses the impact of carrier ' s liability for damage compensation provided by contract law on carriers under charter party , including the validity of exception clause under charter party and the application of the principles of liability for damage compensation provided by contract law under charter party 第五章探讨了新合同法有关承运人赔偿责任制度的规定对租船合同中承运人赔偿责任制度的影响,这其中包括新合同法中有关运输合同的归责原则对承运人的影响、新合同法下,租船合同中的免责条款的效力、以及新合同法中的损害赔偿责任原则在租船合同中的适用三个问题。
For the issue of blind parameter estimation of dsss / bpsk signal damaged by strong additive white gaussian noise ( awgn ) , this dissertation mainly researches on carrier doubler method ( cdm ) , auto - correlation method ( acm ) , delay - and - multiply ( dm ) method and fourth - order cumulant 2 - d slice method 针对受强高斯噪声污染的dsss / bpsk信号对抗技术中的盲参数估计问题,本文着重研究了平方倍频法、时域自相关法、延迟相乘法三种常规的单参数估计法以及四阶累积量2 - d切片多参数估计法。
In the era of knowledge economy , enterprises " competition , creation , using and increment of knowledge and rational deployment of resources finally rely on carrier of knowledge namely knowledge worker ( kw ) to realize . by way of knowledge ' s carrier , knowledge workers are more important in enterprises " actions and become the important component of enterprises values 知识经济时代,企业之间的竞争,知识的创造、利用与增值,资源的合理配置,最终都要依靠知识的载体? ?知识型员工来实现,作为知识载体的知识型员工在企业中的作用越来越重要,成了企业价值的重要组成部分。
In this thesis , firstly , we put forward a new algorithm of the synchronization of carrier reference phase , that is to use the curve synthesizing with the general digital carrier phase looper to have an estimation on carrier frequency within 10 ms so as to meet the need of meteor burst communication . we have done some simulations to get the performance of carrier frequency estimation using two modulation modes ( 16qam and 4 - qpsk ) , and had some test on the carrier phase looper in conditions when using different baud rate transmission and when the baud tuning have windage 我们对两种正交调制方式( 16qam和4 - qpsk )进行了模拟工作并给出了模拟结果,同时讨论了码元同步定时误差对锁相环路工作的影响并根据流星通信中使用变速率传输时锁相环路的载波同步性能进行了测试;然后在基于软件无线电思想的数字处理平台(该数字处理平台实现了中频数字化)上用dsp软件完成了载波的相位跟踪。
At present the manufacture of surface acoustic wave use the technology of the final submicron . a series of the devices of low insertion loss , high q saw rayleigh surface acoustic wave resonators or stws that insertion loss has less than 5db , load quality factor ( ql ) is more than 1000 on the quartz piezoelectric with zero of first temperature factor in the research . these difference frequencies are 60mhz , 280mhz , 739mhz and 1ghz of normal frequency and at also surface acoustic wave . using 1 . 25db noise factor amplifier , careful design curcuit , good setting printed curcuit board , and using the 1ghz surface transverse wave resonator as frequency element , researching the low phase noise surface acoustic wave with sideband phase noise near ? 120dbc / hz deviating 1khz on carrier , spurious suppress with 80db 本研究采用一阶温度系数为零的压电石英基片上制作出损耗小于5db 、有载品值因素( ql值)超过1000的一系列低损耗、高q值声表面波rayleigh波或stw谐振器,频率分别为60mhz 、 280mhz 、 739mhz和1ghz等不同频率的高性能声表面波谐振器。并采用噪声系数为1 . 25db的低噪声系数放大器,精心设计电路,优化设计布置印制电路板,用标称频率为1ghz的声表面波谐振器为频率控制元件,制作出在偏离载频1khz处的单边带相位噪声近- 120dbc / hz 、杂波抑制达80db以上的低相位噪声声表面波振荡器。
10 . a experiment is done which apply the gps surveying technology to yaw and speed of the large - scale irrigation system in remote control with other auxiliary sensors . it is shown that gps high accuracy surveying technology based on carrier pha 将高精度的gps偏航距离和速度测量技术应用于大型平移式喷灌机的导向与速度遥测、遥控系统中,配合其它辅助传感器组成实时测量与导航控制系统,试验证明基于载波相位的gps高精度测量技术能否满足大型喷灌机变量控制的各项技术性能要求。
Low temperature plasma has been extensively investigated for catalyst preparation , including plasma chemical synthesis of ultra - fine particle catalysts , plasma regeneration or plasma treatment of catalysts , plasma - assisted deposition of catalytically active compounds on carriers and combination of plasma and catalyst in reaction system 摘要低温等离子体技术在化学生产中的用途越来越广泛,它在催化剂领域的应用主要表现在以下几个方面:超细颗粒催化剂合成,催化剂再生,催化剂表面处理,活性组分沉淀到基体以及低温等离子体系统中添加催化剂。