crop marks
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In this paper we analyze the marks of the 2003 grade students and give some explanations to the results. Three parts are included as follows:(1) In the first chapter we study the 2003 grade students" math term marks and their cet-4 marks according to their entrance marks by using the clustering analysis of ordered sample. From the results we find some factors that affect the students" marks. And we also prepare for the analysis of variance that include quantitative variable.
本文通过对我校2003级学生的各种成绩及相关信息采用不同的统计方法进行分析,并对统计分析结果的实际意义进行解释和讨论,主要涉及以下三方面内容:(1)第一章中用有序样本聚类的原理,对学生的高考成绩和高等数学统考成绩以及四级成绩进行聚类分析,初步找到一些影响学生成绩的因素,同时也为后面包含定量变量的方差分析模型做了准备。
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Results showed that the CO2 absorb ability in the eight Crop systems net productivity process was 4 032 366ta^(-1); the amount of CO2 outlet in the soil was 3981753ta^(-1), less than the CO2 adsorb ability, so that the whole crop system was a weaker carbon sink process in the atmosphere. The continue planting species such as Rice, sugarcane, cassava, and melon crop or high haulm crops have the characteristics of annually crop net productivity CO2 absorb ability bigger than soil CO2 outlet and this systems had bigger carbon sink function ability; the short haulm crop systems of peanut, soybean, flowers, and vegetable annually crops net productivity CO2 absorb ability less than soil CO2 out let, but also carbon sink source. The CO2 absorb ability of fruits and economic parts above ground bigger than that which growth under ground. Except of the CO2 absorb ability less than the soil CO2 outlet in the peanut during growth in procreate period, the other seven crops CO2 absorb ability were bigger than that soil CO2 outlet during procreate period. Most of crops during growth in procreate period had carbon sink function ability, and only in barren period showed the carbon source function phenomenon.
结果表明:2005年广州市8种农作物系统作物净生产力吸收CO2 4032366ta^(-1),其土壤CO2排放3981753ta^(-1),吸收大于排放,对大气CO2而言,整个农作物系统是一个弱的碳汇;水稻、甘蔗、木薯和果用瓜4种连作或高杆作物系统每年作物净生产力吸收CO2量大于土壤CO2的排放量,系统具有较大的碳汇功能,花生、大豆、花卉和蔬菜4种矮杆作物系统每年作物净生产力吸收CO2量小于土壤CO2的排放量,系统起着碳源作用;果实或经济产量生长在地上部分的作物其单位面积吸收CO2能力比果实生长在地下的作物大;除花生在生育期间生物量吸收CO2量少于同期土壤排放以外,其余7种作物在生育期间生物量吸收CO2的量大于同期土壤排放,大多数农作物在生育期间具有碳汇功能,在撂荒期才体现碳源作用。
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The planting structure has been converted from the duality of "food crop-economics crop" to the triplicity of "food crop-economics crop-forage crop".
利用实地调查,文献分析的研究方法,分析西藏一江两河地区种植业结构和畜牧业结构。
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Crop marks:剪切标记
Comound path 复合路径 | Crop marks 剪切标记 | Graph 图表
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Crop marks:剪切记号
705cropn. 农作物,产量,平头; v. 收割,修剪,种植 | 706crop marks剪切记号 | 708cross cursor十字光标
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Crop marks:裁切标记
crop guide 裁切参考线 | crop marks 裁切标记 | cross correlation 交叉相关
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Crop marks:剪裁标示
剪裁 crop | 剪裁标示 crop marks | 剪裁 cropped
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Adding Crop Marks:添加裁切标志
Adjusting Margins and Gutters 调整边空和间距 | Adding Crop Marks 添加裁切标志 | Saving a Template 保存模板