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数量调查

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Based on the survey of community plots, a quantitative analysis of the communities at Luya Mountain is performed with TWINSPAN Two Way Indicator Species Analysis and DCA Detrended Correspondence Analysis methods. 82 quadrates collected from Luya Mountains were classified into 28 types by TWINSPAN, which belong to seven vegetation types. The result of DCA indicated that those 28 types were reliable. Diagonal line of the two-dimensional ordination diagram of DCA reflects the gradient changes of elevation, temperature and humidity. It is considered that the major factors that restrict the community distribution of the mountains are elevation、temperature and humidity.

本文在群落样方调查基础上,采用双向指示种分析法TWINSPAN和除趋势对应分析DCA对山西芦芽山植物群落进行数量分类和排序TWINSPAN等级分类将芦芽山82个样方分为28类,可归属于7个植被型,分类结果反映了植物群落类型与环境梯度之间的关系,并在 DCA二维排序图上得到较好的验证DCA排序轴对角线基本反映了海拔、温度和湿度的梯度变化,表明群落生境所在地的海拔、温度和湿度是决定群落分布的主要因素

The quality and quantity of rations should be discussed regularly with the displaced people, and complaints should be investigated.

应当定期与灾民讨论口粮的质量和数量,并对投诉进行调查。

In the end genius reconquered the vast amount of material collected by research and purely objective investigation was forced to submit to hypothetical inference and to become the latter's servant in the procurement of further factual evidence derived from analogies.

最后,天才们终于重新夺回了这些数量庞大的研究材料。完全客观的调查被迫服从于假设推论,为类推获取相应的实证,从这个意义上说,前者沦为了后者的仆从。

Because soil vapor extraction technology and air sparging technology mainly depend on physical mechanisms, such as basic computation of fluid dynamics, the expected results are often obtained if one can control the required variables.

本论文主要针对国内已完成整治加油站污染场址,经由场址背景资料汇整与场址采用整治方式之适切性及其成效做探讨,分析几个影响整治成果之因素,包括采样位置、污染时间、地下水位等,进一步选定常见的土壤气体抽除法及空气注入法成功案例评析,而依据各场址整治流程发现,整治工法能否成功,掌握改善作业之关键点因素是最重要的部分,如场址特徵,污染物扩散情形、土壤质地,及是否适合现地整治等,由於土壤气体抽除法及空气注入法之整治方式,主要为物理性机制,牵涉到一些基本流体力学的计算,只要掌握足够之变数因子,利用推导方式,设置适合之整治井数量,通常应能获得预期之成效,但前提仍是现地场址的特性调查须完整,如此推导之结果才具有足够之可信度,由於国内整治计画及成果报告内容中,针对污染场址所施行工法的设计参数资料大多仅略述,仅将重点放在整治后采样之数据上,因此往往其整治成效在理论推导上较缺乏支持。

And understates the real income of most Americans.

许多因素造成了报告的误差,其中最关键的,是这份调查显然低估了美国公众所享受的真实经济资源数量和年收入。

When arrived at Longbaotan National Nature Reserve on May 15th and 16th , we found only 4~5 pairs of Black-necked Cranes at the altitude of

途中调查了黑颈鹤的分布与数量。5月15-16日在青海玉树地区的&隆宝国家级自然保护区&访问和实地调查,只遇见4-5对黑颈鹤,海拔

Through actual investigations, at present, the combination machine in a factory has a huge proportion require boring hole machining of parts is also a lot of volume, so Boring power head has plenty of room for development and broad application prospects.

通过实际调查,目前,组合机床在工厂中占有很大的比重,需进行镗内孔加工的零件数量也很多,所以,镗削动力头有很大的发展空间和广阔的运用前景。

Through the diversity investigation of weed in large area of white clover seed production atMaming (1)In the seed production of white clover in large area, by the growing of white clover, the species and quantity of weed are increasing rapidly;(2) Because the growth speed of white clover is slower than other grass in the seeding year,the early field management is effect to prevent the fast growth of the weeds.

通过对农业部白三叶种子生产项目在云南省马龙县马鸣乡大面积生产中杂草的多样性调查,结果表明:(1)在白三叶种子大面积生产中,随着白三叶的生长,田间杂草的种类和数量逐步增加;(2)由于在白三叶播种当年其生长速度不快,因而在其生长前期应适时除杂,以防止杂草的迅速生长。

Quantity of systemic insecticides in cotton seeding was analysed at regular intervals, and the effect on cotton aphid control was surveyed.

用涂茎、喷雾和拌种3种方法施药,定时采样测定棉苗中内吸杀虫剂的数量动态及调查对棉蚜的控制作用。

Census of Crow Pheasant was conducted in Guangdong Haifeng Avian Nature Reserve in 2005. Among four seasons, there were thirty two individuals recorded in summer which was the most. The mean-individual of each line in summer was significantly higher than that in spring and autumn (P.05). The population density in summer was the highest, 17.78 ind./km^2 vs. 1.11 ind./km^2 in winter which was the lowest.

为掌握褐翅鸦鹃在广东海丰鸟类自然保护区的种群现状,提出有针对性的保护措施,2005年对保护区内褐翅鸦鹃数量行了调查。4个季节中,夏季记录的个体数最多(32只),其样线平均个体数与春季、秋季相比,差异性显著(P.05);夏季种群密度最大,达17.78只/平方公里,冬季仅为1.11只/平方公里。

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