查询词典 operation of symmetric difference

As a differential detection is used between the intercarrier, the proposed algorithm overcome the high sensitivity to timing error of conventional algorithm and is robust to multi-path. The effect of sample frequency offset can't be ignored in a continuous OFDM system of a large number of subcarriers. The estimation precision of the conventional algorithm is low and the realization is complex. A joint estimation of sample frequency offset and fine frequency offset based on difference operation is proposed. As averaging use a large number of samples in a maximum likelihood algorithm, the estimation precision is very high. The use of difference operation cancel the effect of carrier frequency offset, and the proposed sampling frequency estimation algorithm is robust to carrier frequency offset.

最后，本文对连续系统中的采样频率和载波频率精同步技术进行较为深入的研究，由于子载波数目大的连续OFDM传输系统中，采样频率偏差不可忽视，以往的采样频率估计方法精度低、实现复杂，因此本文提出了一种基于差分处理的采样频率偏差和精载波频率偏差联合估计算法，利用了最大似然算法进行采样频率偏差的估计，由于采用了差分处理方法，消除了载波频率偏差对采样频率偏差估计的影响，采用的最大似然算法对大量样点进行平均化处理，所以，相对以往算法，提出的联合算法估计精度高，而且采样频率偏差估计对载波频率偏差具有鲁棒性。

Results There's little difference in the operational complicated disease,A-class healing rate of the cut,gut response,use of sedative,the first out-bed activity time after operation and anal exsufflation after operation.The entry into the venterimus and operation of the small-cut ventrotomy takes less time than the celioscopeoperation does,and the cost of the former is lower.

结果 两组手术并发症、切口甲级愈合率、胃肠道反应、使用镇静剂、术后第1次下床活动时间、术后肛门排气时间差异无显著性；小切口剖腹组进入腹腔时间、手术时间较腹腔镜组少，小切口剖腹组费用较腹腔镜组低。

The changes were observed and anlysised. Results In the normal days and after operation, the far distance binocular vision and near distance stereoacuity were no significant difference between 14 cyclic esotropia cases and normal. In 16 cases of consecutive esotropia, 12 cases had no binocular vision before operation, and after operation, simultaneous perception were acquired in 16 cases (100%), fusional power in l6 cases (100%) while the range of fusion was lower than normal, far distance stereoscopic vision in 10 cases (62.5%), near distance stereoscopic vision in 8 cases (50%).

观察术前、术后的远双眼视觉，近立体视锐度变化：结果 14例周期性内斜视患者术前正位日及术后远双眼视觉及近立体视锐度与正常人群相比无显著性差异。16例恒定性内斜视术前12例(75%)无双眼视觉，术后16例(100%)具有同时知觉能力，16例(100%)可获得融合力，但融合范围低于正常人群。10例(62.5%)获远立体视，8例(50%)获得不同程度近立体视。

Results The operation of treatment appendicitis perforation with diffuse peritonitis by McBurney incisions whose incisions pain disappeared quickly, intestine function recoveried fast, length of stay was short, scar was little and secluding, the complication of abdominal cavitywas residual abscess was only 0.7% higher than operation by righ middle abdomen paramedian incisions, but incisions infectious rate reduced 2.19%, pulmonary infection and pulmonary atelectasis decreased 1.50%, incisional hernia incidence rate cut down 1.50%, adhesion of intestine after operation was no difference between two groups.

结果 经麦氏切口手术治疗阑尾炎穿孔合并弥漫性腹膜炎组切口痛消失时间短，肠功能恢复快，住院时间短，疤痕小且隐蔽，在并发症中腹腔残余脓肿发生率较经右中腹旁正中切口仅高出0.70%，术后发生肠粘连无差异；而较经右中腹旁正中切口，感染率降低2.19%，肺部感染、肺不张发生率降低1.50%，切口疝发生率降低1.50%。

Cases include cholecyst operation, appendix operation hernia mending operation, biliary duct operation, and other stomach operations.

手术病例有胆囊手术、阑尾手术、疝修补手术、胆道手术、腹部其他手术病人，年龄18-65岁。

Open introduction of official of closure operation center, use small drop oneself since active defence software, opened system of information of network of closure operation center to be prevented successfully hacker and the attack that to operation center hundreds computer adds up to 1856 times mixes all sorts of virus inbreak, never had happened to open closure to wait for incident of all sorts of information divulge a secret about plan, the development unit that BOCOG orders active defence software for this Xiang Wei -- small drop company was issued " outstanding contribution " commemorative certificate, open closure operation center to send letter acknowledgment technically also.

开闭幕式运营中心官员介绍，自使用微点主动防御软件以来，开闭幕式运营中心网络信息系统成功阻止了黑客和各种病毒对运营中心数百台电脑共计1856次的攻击和入侵，从未发生过开闭幕式有关方案等各种信息泄密事件，北京奥组委为此向微点主动防御软件的研制单位——微点公司颁发了"突出贡献"纪念证书，开闭幕式运营中心也专门致信感谢。

Take shanghai this cosmopolis as the base, integrates global resources, takes the brand as the key point, processes the commercial operation and the promotion, onedear marketing team operation range covers the entire brand operation, from brand promotion, channel operation, overseas market, the government cooperation as well as the special channel and so on.

以上海这一国际大都市为基地，整合全球资源，以品牌为重点，进行商业运作和推广，运营范围涵盖从品牌推广、渠道运营、海外市场、政府合作以及特殊渠道等全方位品牌营销。

Is revised to read, The rural collective economic organizations apply the dual operation system characterized by the combination of centralized operation with decentralized operation on the basis of operation by households under a contract.

修改为：农村集体经济组织实行家庭承包经营为基础、统分结合的双层经营体制。

In part one (chapter 2-3), two new methods and systems of optical parallel logic operation are studied. Triple-in Double-out shadow-casting logic operation system is proposed and realized for the first time. Based on this, optical full adder and 3-bit decoder array logic have been obtained. It is the first time to use coding pattern and different reading-writing model to realize BSO-PROM optical parallel logic operation where the time-order operation is avoided, so that the computing speed of optical parallel logic gate which uses this kind of spatial light modulator is increased, and it is successfully used in optical symbolic substitution .

在第一部分，对两种新的并行光学布尔逻辑运算方法及系统进行了研究：首次提出并实现了三输入、双输出铸影光学逻辑运算系统及其由此得到的光学全加器，并提出一种以此为基础的3-比特译码器阵列逻辑，首次利用图形编码和不同的读写模式实现了无时序操作的BSO-PROM光并行逻辑运算，大大提高了这种空间光调制器用作光并行逻辑门的运算速度，使之成功地用于光学符号代换之中。

This paper from the case and the operation mode to achieve the theoretical basis to start,First of all, with mixed operation will be separate operation compared,Analysis of their gifted child,In conjunction with our financial status of the actual situation,Mixed Operation thus put forward in the implementation of China's need for.

本篇论文从实现混业经营的事例和理论基础入手，首先将混业经营与分业经营进行对比，分析其各自优虐，并结合我国金融现状的实际情况，进而提出混业经营在我国实施的必要性。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？