[目的]通过施用石灰改变土壤酸碱度,提高水稻单产。[方法]在相同的自然条件下,使用不同用量石灰,进行对比试验,总结出能夺取高产的最佳用量。[结果]山区水稻田施用石灰能调节
The method of lines based on Hu Hai-chang’s theory for the vibration and stability of moderate thick plates is developed. The standard nonlinear ordinary diffe
In this paper, the conformal mapping problem on the transformation from the interior of a unit circle to the interior of the simply connected region or exterior
一、街头小贩自制的食品,如糖葫芦、棉花糖、糖人人等,这些食品掺了一些色素和糖精,大多不符合国家规定的卫生要求,吃了对孩子的身体有害。二、幼儿不宜吃过咸食物,有些家长
In this paper, we consider a singularly perturbed problem without turning points. On a special diseretization mesh, a coupling difference scheme, resulting from
[目的]评估有机-无机复混肥在水稻上的田间应用效果。[方法]通过田间试验评价一种有机-无机复混肥在水稻上的应用效果。[结果]试验结果表明，在中等肥力条件下施用有机-无机复
In order to study natural convection effects on fluid flows under low-gravity in space, we have expanded variables into a power series of Grashof number by usin
This paper discusses the numbers of jump layers of boundary value problems in quasilinear differential equations. In addition, the paper gives several examples
An improved boundary clement method has been used in analyzing and calculating the problems of the torsion of a prismatic bar with elliptical cross-section. In
Using the Somigliana formula and the concepts of finite-part integral, a set of hypersingular integral equations to solve the arbitrary fiat crack in three-dime