查询词典 acquisition

to reduce the impact of carrier frequency offset in ofdm system,this thesis designs a new carrier frequency offset estimation scheme for ofdm system.the carrier frequency offset estimation includes acquisition and tracking.we adopt variable step size adaptive algorithm.the acquisition range of the proposed algorithm is as large as one half of the overall signal bandwidth.through this method we can not only avoid the feedback by using forward error correction,but also reduce the times of complex multiplication in order to reduce the power consumption of the system.this algorithm not only has low complexity and fast convergence nut also can improve the demodulation performance of ofdm system.computer simulation illustrates the superior performance of the proposed algorithm with regard to estimation accuracy in both awgn channel and multi—path channel.

摘 要：为了减小正交频分复用系统受频率偏差的影响，在ofdm系统中设计了一种新的载波频偏估计算法。频偏估计包括跟踪和捕获两个阶段，文中采用变步长自适应算法来进行跟踪，这个跟踪算法的捕捉范围是整个信号带宽的一半。通过此方法，不但可以利用前向纠错的方式来避免反馈，而且可以缩减复数乘法的次数以降低计算复杂度和系统功耗。该方法运算复杂度低，并具有较好的收敛性，能改善odfm的解调性能。从计算机的仿真效果可以看出无论是在awgn信道上还是在多径信道上都表现出了卓越的性能。

This article, taking data acquisition and the monitoring system theory as a background, taking as real-time signal processing design TMS320 series DSP is the control core specially, using the CAN bus communication. Using Visual C++ developing compter monitoring system, has composed high speed, real-time data acquisition and processing system.

本文以数据采集和监控系统理论为背景，以专为实时信号处理设计的TMS320系列DSP为控制核心，采用CAN总线通信、Visual C++开发的上位机监控系统组成了一个高速、实时数据采集与处理系统。

ABSTRACT Data acquisition and processing system of target diagnostication in Inertial Confinement Fusion experiments are very important parts, which support acquisition, storage and processing of target-diagnostic data.

ICF实验靶物理诊断系统中的数据采集和处理系统是ICF实验中的重要组成部分。

After looking carefully, discover the author sums up hold out actually classical: Those who break the law die surely, do not update content die surely, acquisition station is waited a moment to death surely, carried to stationmaster friend on the footing that stands in summary wake, do not go again 7 years rubbish stands, the old road of acquisition station, or does electronic business affairs, make a product, or is done make choice only.

仔细看过之后，发现作者总结的其实挺经典的：违法乱纪的必死，不更新内容的必死，采集站必死等等，站在总结的立场上给站长朋友提了个醒，不要再走07年垃圾站，采集站的老路，要么做电子商务，做产品，要么就做专做精。

And due to the nature of the data acquisition, three data acquisition circuit board are adopted. They are voltage to digit data converting circuit board, current to digit data converting circuit board and digit data input/output circuit board. These circuit boards are used to acquire the main running parameter of the multifunctional experimentation equipment and to control the output of alarm message.The monitor and control program is developed on Delphi5.0 which is an excellent product of Borland Corp.

数据监控系统的硬件以一台工业控制PC机为核心，并根据采集信号的性质配置了电压-数字量转换板、电流-数字量转换板及开关量输入／输出板，对实验台的主要运行参数进行采集并进行报警控制；监控系统的软件以BORLAND公司的Delphi5.0作为开发平台，采用了面向对象的设计方法，运用了多线程、数据库等技术，做到了界面美观、操作方便。

In this report, the author tried to dissociate conscious from unconscious aspect of each component of language acquisition and provide supporting evidence for these two aspects of acquisition.

还有一些在开始时是意识的，但最后掌握的却是无意识的知识。这些面向都不是用单纯的「天生」的观点可以解释清楚的。

The tide of international banking ascendant, appear a series of new features: the acquisition of main motivations for international banking industry has become the supremacy of merger, acquisition based on the way to the focus has moved eastwardly, merger, the next round of the Asian region, hot will be triggered by the international banking mergers acquisitions of big financial.

当前国际银行业并购的浪潮方兴未艾，呈现出一系列新的特征：并购的主要动机已变成争夺国际银行业的霸主地位，并购的方式以合并为基础，并购的重心已经东移，下一轮并购的热点将是亚洲地区，由银行业并购引发了整个国际金融业的大并购。

A data acquisition and data analysis software for the fast fluorscence kinetics fluorometer of our laboratory is redesigned and recompiled using assembly and BASIC language. The data acquisition rate in the fast rising part of the fluorescence kinetics curves is one order faster (100μs/point) than the old one. It can measure fluorescence parameters, such as Fo and Fi more accurately for calculation of the relative content of inactive PSⅡ, etc.

用N80-BASIC语言结合汇编语言重新编写了本室快速叶绿素动力学荧光计的测控程序，使快速荧光上升曲线的采样速度提高了一个数量级（达到100μs／点），可对Fo、Fi等关键荧光参数进行精确测定，为无活性PS Ⅱ中心相对含量的准确测定奠定了基础。

In this paper, problems and related technical measures about structure of acquisition system, preamplifier , power and earthing, which must be considered in designing foreside of high-speed data acquisition system, are discussed.

研究了关于高速数据采集系统前端设计时需考虑的结构、前置放大器、电源和接地等问题及其相应的技术措施，从而为设计高性能的高速数据采集系统提供参考。

The merger, to be effected through SP Telemedia acquisition of TPG for an acquisition price of $150 million in cash, to be funded through debt, plus 270 million SP Telemedia shares.

合并后，要通过sp电信收购TPG的收购代价1.5亿美元的现金，以资助是通过债务，再加上2.7亿sp电信的股份。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。