Based on the Hamiltonian governing equations of plane elasticity for sectorial domain, the variable separation and eigenfunction expansion techniques were emplo
创新是指把一种状况变为另一种,或者把一个事物转换为另一个。教育可以从两个维度来理解:一是老师把知识传授给学生;二是主动进入学习过程。除非知识是始终如一且恒久不变的,否则
On the basis of existing plasticity-based damage model for plasticity coupled with damage for localization analysis, constitutive parameter identification was c
<正> 明末农民战争中,张献忠、李自成长期采用流动作战的方针,抗击明军的镇压,取得反围剿斗争的胜利。然而这种流动作战表现出明显的流寇主义作风,攻城略地,随占随弃,忽视建立根据地以发展和巩固革命战争成果。但至崇祯末年,农民军在中原、江汉痛歼明军主力,改变敌强我弱局面之后,张献忠也开始意识到克服流寇主义、建立农民政权的必要性,因而相继在武昌、湖南、四川试建农民政权。本文主要论述张献忠在湖南建立政权的问题。一张献忠于崇祯十六年(1643)夏,乘李自成略定荆襄,威震江汉,左良玉望风顺江东遁之机,自
It was proposed that a robust and efficient parallelizable preconditioner for solving general sparse linear systems of equations, in which the use of sparse app
“2010年1月的中原大地天寒地冻。可是,在河南省新安县一个偏远的山村农户家中传出了欢声笑语,洋溢着温暖幸福生活的气息。村民高兴地围坐在改良的炉灶旁边,耐心地听着河南省疾
扁担山白水河谷是位于贵州省中部地区的典型喀斯特河谷地貌区,在长约30km,宽约1km的河谷中,分布有上百个具备特色的布依族山地聚落,其中48个在历史上即被称为“扁担山布依48大寨
Interactions between different scales in turbulence were studied starting from the incompressible Navier-Stokes equations. The integral and differential formula
大青叶在临床上应用广泛,具有抗菌消炎的作用,可用于流行性乙型脑炎、上呼吸道感染、流行性感冒的防治。用法如下:1.流行性乙型脑炎 单味大青叶水煎剂,对轻、重型流行性乙型脑炎治
A newly developed Z fracture criterion for the composite materials was introduced,the new concepts of in-plane average strain,in-plane dilatational strain energ