查询词典 fading

The time-varying channel was modeled as an autoregressive process and a low-dimensional Kalman filter based on pilots was used to estimate the AR parameters,and the LS algorithm was adopted to track the time-varying channel fading factors.

采用AR过程对信道进行建模，利用基于导频的低维Kalman滤波算法进行信道估计，并采用LS算法估计时变的信道衰减因子。

For simplicity, a one-dimensional autoregressive process is used to model the time-varying channel, and the least square algorithm based on pilot signals is adopted to track the time-varying channel fading factor a.

为了简化计算，采用一阶自回归过程对时变信道进行建模。

This just proves that alternative distribution and marketing can sell more DVDs than sticking to the traditional, slow, expensive and fading distribution model, said Gary Baddeley, president of the Disinformation Company.

这部纪录片的DVD每张售价12.95美元，特别是在沃尔玛"炮轰"该影片后，其销售量反而激增。

However, with the memory of suppression under previous regimes fading--Mr Museveni has ruled for 23 years--and with the allocation of senior government positions (at some stage the prime minister, vice-president and finance minister have all been Baganda) insufficient to appease hard-line Buganda nationalists pressing for more autonomy, a showdown is looming.

但是，由于随着新政权统治时间的增长，（到现在穆塞韦尼总统已经统治了23年）在前政权下曾经遭受统治者镇压的历史渐渐被淡忘，（有些时期，总理副总统以及财政部长全都是巴干达人）已经不足以满足他们，这些有着强硬态度的布干达国家主义者一直迫切要求得到更多的自治权，摊牌的时刻迫在眉睫。

We compare the clinical symptoms,physical sign fading time ,the Balthazar grade of CT examination after treatment for three days and by statistic methods.

目的 研究静脉使用甘露醇辅助治疗急性胰腺炎的临床疗效方法对经保守治疗好转的急性胰腺炎病例进行回顾性分析，从中随机抽取40例辅助使用甘露醇的病例和40例未使用的病例分成两组，通过对比使用组与未使用组临床症状、体征缓解的时间及治疗3天后CT检查的Balthazar评分，并进行统计学处理。

Methods We analyze the acute pancreatitis cases who were cured by conservation therapy retrospectively. We divided the patients into two groups each one has 40 patients.We give mannitol to one group random and not to another group. We compare the clinical symptoms,physical sign fading time ,the Balthazar grade of CT examination after treatment for three days and by statistic methods.

对经保守治疗好转的急性胰腺炎病例进行回顾性分析，从中随机抽取40例辅助使用甘露醇的病例和40例未使用的病例分成两组，通过对比使用组与未使用组临床症状、体征缓解的时间及治疗3天后CT检查的Balthazar评分，并进行统计学处理。

Such images made Inman happy, as did the following pages wherein Bartram, ecstatic, journeyed on to the Vale of Cowee deep in the mountains, breathlessly describing a world of scarp and crag, ridge after ridge fading off blue into the distance, chanting at length as he went the names of all the plants that came under his gaze as if reciting the ingredients of a powerful potion.

这派景象让英曼感到心旷神怡。后面几页是巴川姆游历群山环绕下的考维谷时所见所闻，无不令人心驰神往。作者一口气描绘了一个悬崖峭壁，层峦叠嶂，山峦与天际一线的世界。还不厌其详列出他所有见到的植物的名字，如数家珍。

Firstly the basic principle of OFDM and its anti-multi-path-fading are briefly introduced in this paper. Then basing on this point, we researched the basic principle, the coding designing and the algorithm of the signal detection of these MIMO-OFDM systems. At the same time, the performances of STBC-OFDM and SFBC-OFDM were analyzed and simulated under short wave circumstance, and got some useful conclusions, they have certain reference value for more research of short wave communication in future.

本文首先介绍了OFDM系统的基本原理以及它对抗多径的基本原理，然后在此基础上，对其所形成的几种MIMO-OFDM系统的基本工作原理，码字设计以及相应的信号检测算法进行了研究，详细分析研究了STBC-OFDM和SFBC-OFDM系统的性能并在短波信道下对其性能进行了仿真和对比分析，得出了有用的结论，这对以后短波通信的深入研究具有参考价值。

I'm fading, while you are only beginning to blossom and bear fruit.

我已经走上了飘落的路。你还是在开花结果的时节。

The simulation results show that this method has a good BER performance and is robust to fast fading channel.

仿真结果表明该信道跟踪方法具有良好的误码率性能，且对快衰落有很强的鲁棒性。

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。