THE THREE-DIMENSIONAL CALCULATING MODEL OF INVERSE PROBLEM IN ECG AND A SPECIAL BOUNDRYVALUE PROBTEM

In this paper, the mathematical model and the three-dimensional finite clement formulation of inverse problem in electrocardiography (ECG) under a general inhomogcneous and anisotropic configuration of the torso conductor is focused on. The following points are especially considered: 1. The mathamatical model is described by a differential equation instead of the Fredholm integral equation. 2. A kind of special boundary value problem is defined as ill-posed boundary value problem. 3. A group of finite element formulation, in which the method that treats anisotropic medium, is built up. 4. The calculating method of ill-posed boundary value problem is discussed.     

紫花苜蓿三种同功酶分析

采用聚丙稀酰胺凝胶电泳技术,测定33个紫花苜蓿品种的过氧化物酶、酯酶和亮胺酸氨基肽酶三种同功酶,利用遗传距离进行聚类分析,结果表明：同功酶谱相似程度与品种的秋眠数之间有一定关系.     

辐照大豆诱发突变及其突变体的检测

不同剂量的γ射线、电子束单因子及其与不同浓度的苯甲酰胺复因子处理大豆种子，均能诱发其生育期、孕性和株高等农世性状的突变，同时还能诱发蛋白质、氨基酸等品质突变，而且复因子处理较单因子处理的突变频率高。此外，筛选出的不同类型的突变体，其过氧化物酶海性及过气体物酶同工酶酶谱均有明显差异。因此，可应用过氧化物酶等同工酶酶谱分析法对突变体进行检测。