取样

As we all know, the more points we have, the more can be constructed triangulations, and the city construction's details are show more. But now the point cloud data we collected existence of a large quantity and data redundancy, it would greatly enhance the time cost of the follow-up Grid Construction and other operating.

众所周知，在城市建筑物表面上取样点越多，可以构造出越多的三角片，越有利于呈现细致化的效果，但是现在机载激光雷达采集的点云数据量很大，数据有冗余，这样会大大增加网格构建的时间和其他后续操作的开销。

Theoretic analysis shows that the output signal R can overcome problems from fouling of the sampling tube or electronic drift.

理论分析表明，检测仪输出值R不受取样管管壁的粘污以及电子元件老化、漂移等不利因素的影响。

P in Shule River Alluvial Fan Oasis in Gansu subsidized by CNSF. Through field geological and environmental observations and sampling, quartz OSL dating, organic carbon ~(14)C dating, as well as analysis of TOC,grain size and Pollen assemblage of the samples from ten sediment profiles in front fine grain sediment zone of the Shule River Fan, the results obtained as follows:(1)The vegetation evolution history on Shule River Alluvial Fan and circumjacent since about 13 ka B.P. could be divided into 6 phases: about 12.1-13.1ka, a sparse coniferous and broadleaf trees - shrub grassland, cold and wet climate; 9.2-12.1ka, shrub grassland, temperature rising but precipitation and humidity getting down; 5.8-9.2ka, sparse forest with the most flourish shrub grassland under the optimal climate; 4.3-5.8ka, coniferous and broadleaf mixed forests -shrub grassland, temperature rising slightly and getting dry; 4.3-2.8ka, grass vegetation and climate became more dry; 2.8-2.3ka, coniferous forests -shrub grassland, precipitation and temperature getting down, but a higher relative humidity.

本文依托于&甘肃疏勒河冲积扇5万年来古天气环境与古水文演化&项目，以疏勒河冲积扇为研究对象，通过对疏勒河冲积扇扇缘细土带全新世古天气和古水文演变进行了20余个剖面的观测和取样、石英OSL和~(14)C测年、粒度组成和TOC分析以及孢粉鉴定，获得了以下成果和熟悉：(1)距今约13ka年来冲积扇和周边植被演化经历了6个阶段：约13.1～12.1ka，以针叶林为主的针阔混交林～灌丛草原，天气冷湿；12.1～9.2ka，灌丛草原，气温升高，降水量较低；9.2～5.8ka，疏林灌木草原，植被茂盛，温度和降水最佳；5.8～4.3ka，以针叶树为主的针阔混交林～灌丛草原，气温较高，降水减少；4.3～2.8ka，草原植被，天气变干；2.8～2.3ka，针叶林～灌木草原，降水减少，温度降低，相对湿度有所增加。

A feasibility study was conducted in Vientiane and Savannakhet with a convenience sampling.

目前，正在万象和沙湾拿吉通过便利取样的方法，展开一项可行性研究。

The resistance level of German cockroach from different sites was analyzed by average linkage method.

比较德国小蠊对7种杀虫剂的抗性程度差别；比较8个取样点德国小蠊种群的抗性差别，并以类平均法做聚类分析。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。