constant volume sampling (CVS)

The total content and the available content of heavy metals(Cu,Pb,Zn,Cr,Ni,Cd,As and Hg) in soils from main cities' suburbs of the Pearl River delta were analyzed.

分析了珠江三角洲主要城市郊区农业土壤的8种重金属Cu、Pb、Zn、Cr、Ni、Cd、As和Hg的全量和有效态含量。

The state of heavy metal content of agriculture soil in Guangzhou suburbs (Haizhu District, Tianhe District, Huangpu District, Fangcun District, Baiyun District) was investigated, the total content and available content of 8 heavy metal elements (Cu, Pb, Zn, Cr, Ni, Cd, As and Hg) were analyzed and meatured.

调查了广州市郊区(海珠区、天河区、黄埔区、芳村区、白云区)农业土壤重金属的含量,分析测定了Cu、Pb、Zn、Cr、Ni、Cd、As和Hg 8种重金属元素的全量和有效态含量。

Availability contents of Cu, Zn, Mn, Fe and Co in surface soil horizon exceeded the critical value of availability, and the relationship between total contents and available contents of five elements has been established.

各种类型土壤表层中微量元素Fe、Mn、Zn、Cu、Co的有效量均大于其有效态临界值 ,并且Cu、Zn、Mn全量与有效量之间呈明显的相关关系。

THEORETICAL RESEARCH ON THE WORKING CHARACTERISTICS OF AN ADVANCED ENERGY STORAGE SYSTEM USING NH_3-H_2O AS WORKING FLUID,PART TWO—simulation and analysis of working process under the full-storage strategy;

采用氨水溶液的先进蓄能系统工作特性研究(2)—全量蓄能策略下工作过程模拟及分析

The total compensation method (TCM) provides an effective approach to the solution of the composite inversion problem with incomplete input information.

全量补偿法的提出为部分输入未知条件下的结构参数识别以及荷载反演提供了一个很好的思路,但由于该算法在进行参数估计时没有考虑已知输入与未知输入的可信度差别,因此参数收敛过程中会产生振荡现象,收敛速度相对较慢。