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农业碳指标,先行

5月24日、25日,第二轮中美战略与经济对话将在北京召开,美国国务卿希拉里将率领美国代表团前来,讨论一些  (本文共1页) 阅读全文>>

《印刷工业》2014年11期
印刷工业

Chinese CTP Market

According to Printing and Printing Equipment Industries Association of China(PEIAC)'s statistics to the plate manufucturer in China,in 2013,the actual offset plate production ...  (本文共1页) 阅读全文>>

《The Journal of China Universities of Posts and Telecommunications》2014年06期
The Journal of China Universities of Posts and Telecommunications

Low complexity joint time offset and frequency offset estimations for LTE uplink system

The orthogonal frequency division multiplexing(OFDM) is currently used in long term evolution(LTE) system. The time offset estimation(TOE) and frequency offset estimation(FOE) of OFDM is essential in mobile communication base. According to the conventional cross correlation TOE and FOE algorithms, a n...  (本文共7页) 阅读全文>>

《Journal of Semiconductors》2014年05期
Journal of Semiconductors

A high speed low power low offset dynamic comparator used in SHA-less pipelined ADC

A novel fully differential high speed high resolution low offset CMOS dynamic comparator has been implemented in the SMIC 0.18μm process used for a sample-and-hold amplifier(SHA)-less pipelined analogto-digital converters(ADC). Based on the analysis and optimization between delay time and offset, an enhanced reset architecture...  (本文共8页) 阅读全文>>

《The Journal of China Universities of Posts and Telecommunications》2013年06期
The Journal of China Universities of Posts and Telecommunications

Frequency offset estimation based on peak power ratio in LTE system

Orthogonal frequency division multiplexing(OFDM)is one of the key techniques for long term evolution(LTE)system.Frequency offset estimation of OFDM is an essential issue.Especially in the high-speed environment,the frequency offset will become large.Based on the features of LTE uplink physical random access channel(PRACH),this paper proposes a new frequency offset algorithm by using peak power ratio to enlarge th...  (本文共6页) 阅读全文>>

《信息系统工程》2013年05期
信息系统工程

分类汇总&OFFSET函数在数据统计中的若干应用

Excel作为数据统计的一把利器,功能强大。本文再现了笔者将分类汇...  (本文共1页) 阅读全文>>