分组

The analysis and simulation in the paper shows that the PER and throughput of ACL packets decreases logarithmically as the distance and the number of piconets raises.

通过分析和仿真可以看出，各ACL数据分组的丢包率和吞吐量基本随通信距离和干扰微微网的数量呈对数下降关系。

The performance of LEO/MEO mobile satellite communication networks with intersatellite links is analyzed in chapter 6 based on the mean message traversal.

通过增加网络中节点间星际链路的数目可以改善网络的性能，而且这种改善对采用分组交换的系统比采用电路交换的系统大。

The thickness of alveolar wall, the areas of mesenchyma in lung tissue were measured by HE staining. Immunohistochemical evaluation was to detect the expression of TNF-α, TGF-β1, FN protein.

灌药后第7、14、28天分组处死动物，提取肺组织，HE染色行肺泡炎、肺纤维化程度分级及免疫组化测定肺组织TNF-α、TGF-β_1、FN蛋白表达。

According to the monotonically increasing match criteria around the location of the optimal motion vector a fast fractional motion estimation algorithm based on the group error is presented.

根据匹配准则的目标函数在最优运动矢量的附近都是单调递增这一假设，提出一种基于分组误差的快速分数像素运动估计算法。

The morbility of fatty liver was analysed by age and gender,and the association between nutrition variables and fatty liver.

按性别、年龄段分组比较脂肪肝的患病率，并分析各项营养指标与脂肪肝患病的关系。

Methods:One hundred and sixtyeight patients meeting the diagnostic criteria were randomly divided into 3 groups: Moutan powder with Aspirin group, Moutan powder alone group and Aspirin alone group, 56 patients in each group.

采用分组对照的方法，对符合诊断标准的168例患者随机分为三组，每组56例。治疗组给予牡丹皮散加阿司匹林，中药对照组给予牡丹皮散，西药对照组给予阿司匹林。

First, this paper gives an introduction of some methods of unequal probability sampling, their estimators and variance estimators, including sampling with pps with replacement, methods of sampling without replacement suggested by Brewer, Durbin, Sampford , Des Raj , Murthy , Rao-Hartley-Cochran. Then, at the basis of Rao and Bayless's study , we consider that population can be splited two random subpopulations, which are respectively drawn from different infinite super-populations, and compare the stabilities of estimators of the methods that given above.

本文首先从理论上介绍了若干种不等概率抽样方法，它们的估计量、估计量的方差及其估计，其中包括有放回PPZ及PPS抽样，不放回不等概率抽样中的Brewer、Durbin、Sampford、Des Raj，Murthy、Rao-Hartley-Cochran等人的方法；其次，在Rao和Bayless两人就样本单元数n=2的情形对上述抽样方法进行比较的基础上，将总体随机地分成两个子总体，视每个子总体取自不同的线性超总体，在文中，我们利用计算机实现随机分组，并通过画图比较各方法估计量的稳定性，结果表明，对变异系数C.V。

First, this paper gives an introduction of some methods of unequal probability sampling, their estimators and variance estimators, including sampling with pps with replacement, methods of sampling without replacement suggested by Brewer, Durbin, Sampford , Des Raj , Murthy , Rao-Hartley-Cochran.Then, at the basis of Rao and Baylesss study , we consider that population can be splited two random subpopulations, which are respectively drawn from different infinite super-populations, and compare the stabilities of estimators of the methods that given above.

本文首先从理论上介绍了若干种不等概率抽样方法，它们的估计量、估计量的方差及其估计，其中包括有放回PPZ及PPS抽样，不放回不等概率抽样中的Brewer、Durbin、Sampford、Des Raj，Murthy、Rao-Hartley-Cochran等人的方法；其次，在Rao和Bayless两人就样本单元数n=2的情形对上述抽样方法进行比较的基础上，将总体随机地分成两个子总体，视每个子总体取自不同的线性超总体，在文中，我们利用计算机实现随机分组，并通过画图比较各方法估计量的稳定性，结果表明，对变异系数C.V。

Patients were grouped according to surgical approach and preoperative neurological status (myelopathic versus nonmyelopathic).

根据手术入路和术前神经系统状况（存在脊髓病vs不存在脊髓病）对患者进行分组研究。

Methods 203 cleft palate patients(406 ears)were investigated by pure tone audiometry,acoustic immitance audiometry and auditory brainstem response.21 cleft palate patients with SOM underwent palatoplasty and myringotomy with tube insertion at the same time.

方法对 2 0 3(4 0 6耳)例腭裂患者进行年龄分组，采用声导抗，纯音测听或听性脑干反应检查判断中耳功能。2 1例腭裂伴分泌性中耳炎患者在作腭裂修复术的同时，行鼓室置管术，术前术后作听力学检测。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。