Electron theory analysis of alloying elements impoverishment in 12cr1mov 固溶体中贫化的电子理论分析
Electron theory studies on structure andproperties for tib2 and zrb2 phases 2晶体结构与性能的电子理论研究
Collective electron theory 集体电子理论
Study on valence electron theory of phase relationship in a m transformation 奥氏体向马氏体转变时位向关系的价电子理论研究
By employing one - dimension planar gap model , the physical mechanism of rtto is studied by single electron theory approximately 采用一维平板间隙模型,运用单电子理论分析了rtto的工作机制。
Design the configuration parameter of the electromagnets using magnetic circuit theory , and check the temperature increase of the electromagnet . and design a power device using igbt with electric and electron theory . it can supply the electromagnets excitation current which changes regularly on a given rule 对于弯扭矩检测系统,运用应变仪的原理,在试件上的合适位置加贴应变片并组成惠斯登全桥差动电路,检测出实际加载在试件上的弯矩和扭矩的大小。
The following results are achieved : ( 1 ) in accordance with the empirical electron theory of solids and molecules , considering the number of covalent bond pairs on the strongest bond in a segregation structure na , the elements for matrix - strengthening can be chosen . ( 2 ) on the basis of the available phase - equilibrium thermodynamics calculation of alloy system and phase diagrams , which have been worked out , the contents of alloy elements can be identified with reference to the types , quantity and phase - transformation of carbides . ( 3 ) both the values relating to toughness ( including bending strength , yield strength , impact value of unnotched samples ) and hardness of new dm9 die steel are higher than those of crl2mov die steel 结果得出: ( 1 )根据固体与分子经验电子理论,利用偏聚结构单元的最强共价键上的共用电子对数n _ a ,可以选择工模具钢基体相的强化元素; ( 2 )根据合金系相平衡热力学计算及已有的相图,可以碳化物类型、数量及其相变确定合金元素含量; ( 3 )新型dm9钢在强韧性(抗弯强度、屈服强度、无缺口冲击值)和硬度方面均高于cr12mov钢; ( 4 )以dm9钢与6crw2si 、 7cr2wmovsi ( dm7 ) 、 h13和cr12mov四种模具钢的实验比较,进一步验证了上述冷作模具钢合金设计方案是合适的。
Based on the transferred - electron theory of the iii - v compound semiconductor and the research on the lock - on effect of the si - gaas pcss ' s , this paper proposes the monopole charge domain model similar to the guun or high - field domain to explain the peculiar switching phenomena occurring in the lock - on mode theoretically 本文基于gaas等?族化合物半导体的转移电子理论,结合半绝缘gaas光电导开关中特有的lock - on效应的研究,提出了类似于耿畴(高场畴或偶极畴)的单极电荷畴理论模型,对光电导开关lock - on效应的各种现象给出了理论解释。
The influence of a static electric field was investigated systemic in three stratifications : the electron scope of single atom , multi - atom local effect and macro - materials character based on electron theory . the multi - scope effect of electric field on metals and alloys , such as the atomic energy , solute elements , microstructure and precipitates , fracture character , mechanic and physical properties , were studied with the purpose of finding the mechanism and the nature of the electric field 针对目前电场作用研究中的问题,本文以铝合金为研究对象,分别在三个不同尺度的理论范畴:单原子的电子理论,多原子(原子团簇)的微观局域效应,和材料宏、微观行为,系统的、多层次的研究了电场在电子层次,溶质行为,微观组织,以及宏观的断裂特征和性能等多个尺度的电场效应。