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本文提出了一种热力学函数图式运算方法，这种方法把函数和变量的关系按照三种运算规则排列成图形：1) 相邻两函数之差等于连接这两个函数的共轭变量之积；2) 一个函数的微分等于它的两个特征变量的微分乘其共轭系数之和；3) 函数图内圈上每三个变量组成的偏导数等于按反转规则运行的另外三个变量组成的偏导数。运算规则安排巧妙，操作方便，容易掌握。可供教学和科研工作者使用。
A graphic algorithm for the derivation of the characteristic thermodynamic functions has been presented. The relation between the functions and variables are arranged in graphics according to the following three rules. 1) The dif- ference of two neighboring functions is equal to the product of the two conjugate variables which link the two functions; 2) The differential of a function is equal to its characteristic variable differential multiplied by its conjugate coefficient; 3) The partial derivative formed by three variables arranged sequentially along the inner circle is equal to its counterpart formed by another three variables by using reverse arrangement rule. This algorithm is intelligible, operation convenient and easy to grasp, which proves to be beneficial for the teaching and studying.
The comparative experiment was carried out by the application of calcium cyanamide in the amount of 600 kg/hm2 to the soil where the Lei bamboo plantation had been more than 5 years so as to control the soil pathogens and improve the yield of bamboo shoot in Ling’an Lei bamboo forestry. To verify the main factors affecting the recession of Ling’an Lei bamboo forestry, investigation on the changes of soil traits and soil pathogens in the typical surface soil (0 - 20 cm) of Lei bamboo forestry was carried out in the present study. The results showed that 18 types of pathogenic bacteria were detected; the soil acidity was decreased dramatically, the lowest soil pH value reached 3.91; organic matter and available phosphorus content of soil increased significantly, the highest available phosphorus content reached 1272.03 mg/kg in the typical surface soil (0 - 20 cm) of Lei bamboo plantation more than five years without calcium cyanamide treatment. In contrast, in the soil with the supply of calcium cyanamide, no pathogenic bacteria was identified; soil acidity pH value reached 4.98, pH value increased by 1.07, showed statistical significant difference (P < 0.05).
利用MIDAS结构计算软件，计算了跨径108 m的原油码头钢拱引桥在矢高12 m、15 m、18 m、21 m、24 m、27 m下的吊索、拱肋、纵梁、横梁等主要受力构件的轴向拉压应力、竖向剪应力及弯矩变化规律，并通过分析不同矢高下各应力变化规律，提出钢拱引桥矢跨比的设计范围及引桥设计时应注意的事项。
By using the MIDAS structure calculating software, the axial forces, shear force, bending moments of the cross beam, longitudinal beam, arch rib, suspender cable are calculated, which are the main stressed members of the 108-m span length steel arch approach bridge in crude oil terminal when the vector height is 12 m,15 m,18 m,21 m,24 m,27 m. By analyzing the variation of the stresses, the range of the rise-span ratio and points for attention in the design of steel arch approach bridge are put forward.