The bark-percentage models and high models of Fraxinus mandshurica and Juglans mandshurica were P=129.

In contrast,the sectional area of bark is overestimated,since it is calculated by subtracting the area of wood section from over-bark area without considering bark splits.

Thermoevolution characteristics of hydrocarbon generation from Late Permian barkinite-rich coals in Shuicheng, Guizhou Province;

It can be concluded that: firstly,"barkinite" gave the highest pyrolysis yield overall(330mg/g TOC);secondly,"barkinite" is the closest to the adjacent field for typeⅠ and Ⅱkerogens in the ternary diagram of Larter;it is the same as many marine type Ⅱand type IIS kerogens;Third,the pyrolysis products of "barkinite" is the main intermediate c.

Based on the high-purity coal macerals separating and concentrating, Micro-FTIR technique was used to investigate the chemical compositions and structures of barkinite from Late Permian coals in South China, and parallel studies were also carried out on vitrinite, fusinite and sporinite from the Jurassic coals in Turpan basin, Northwest China.

Measuring tree crown volume based on three dimension laser scanning and mapping system—taking Pinus tabulaeformis as a case.;