离散系统中具有功能性反应的捕食-食铒模型的定性分析

运用差分方程的稳定性理论，对一类具有功能性反应的捕食-食饵两种群模型，分析了模型平衡点的稳定性，证明了在某些参数下存在渐进稳定的平衡点，从生态学的意义上得到了两种群持续生存的充分条件．     

一些稀有气体化合物稳定性的热力学探讨

运用化学热力学原理,从共价型和离子型两个模式,讨论一些稀有气体化合物的稳定性和合成途径的可行性.     

带有时滞的多非线性区间Lurie系统的鲁棒绝对稳定性

讨论了一类带有时滞多非线性区间系统的鲁棒绝对稳定性,通过引入区间矩阵,以及Lyapunov稳定性理论,给出了区间Lurie系统鲁棒绝对稳定性的判别条件,推广了参考文献[5]的结论.     

浅谈“法治”与“德治”

坚持“法治”与“德治”相结合的重要思想是我党治国方略的新发展。法治以其权威性和强制性手段规范社会成员的行为，德治以其特有的感召力和劝导力提高社会成员的思想认识和道德觉悟。二者在内容上相互渗透，在功能上相辅相成，在实施效果上相互促进，都是保证社会稳定的重要手段，发展社会主义市场经济不可或缺的两大保障。     

高填土结构基础稳定、路面沉降的计算及测试结果分析

通过对某桥台高路堤工程勘察及历时一年的原位动态变形监测，重点阐述了粘性土直接修筑高路堤结构的变形特征、历时规律和变形稳定性，提出粘性土高路堤工后3年自身变形尚未完全稳定的结论。     

Viewing students consistently: how stable are teachers’ expectations?

ABSTRACT

Over the past 50 years, research has shown that teacher expectations can influence student outcomes. Many studies have examined within-year effects. There is, however, a paucity of research that has investigated the stability of teachers’ expectations across a single year, and there are no studies that have examined stability beyond 1 year. The current study examined the stability of 94 teachers’ expectations within 3 separate years and across 3 years in mathematics and reading. In both subject areas, teachers’ expectations remained relatively stable from beginning to end-of-year for each separate year and also across 3 years. Additionally, teachers who under- or overestimated their students by more than half a standard deviation continued to do so across all periods in the study. This was despite the teachers having different students each year. The study suggests that teachers view students’ capabilities similarly despite having different student cohorts.     

非自治扩散的两种群Lotka-volterra模型的持久性

考虑具有扩散的捕食——被捕食系统,得到系统的最终有界性,对应周期系统正周期解的存在性、唯一性以及全局渐近稳定性.     

大坝与坝基稳定性分析研究

大坝与坝基的稳定一直是工程师密切关注的一个安全问题. 论文提出2种分析重力坝和坝基稳定的方法: 一种是基于刚体极限平衡原理的直接分析方法, 它将坝体和岩基作为不变形的刚体, 利用该方法可直接计算出可能滑动面的安全因数; 另一种是基于弹塑性理论的间接分析方法, 它采用非线性有限元方法分析大坝和坝基的应力和变形. 根据收敛和突变准则来确定稳定安全度.结果表明:工程建筑物的破坏不仅仅是由于施加荷载的原因,同时也与组成材料的性质有关.     

基于随机化的排序过程分析

随机化算法的流程和结果受所使用的随机函数的影响，按影响的性质和程度分为“随机不影响算法的执行结果”、“随机影响执行结果的正确性”、“随机影响执行结果的优劣”三种情况，主要表现在算法的时间效率上．用随机函数全部或部分地抵消最坏输入，可使算法的时间效率不完全依赖于输入的好坏，通过对输入的适当控制，使得执行结果相对稳定．     

Geometrical nonlinear stability analyses of cable-truss domes

The nonlinear finite element method is used to analyze the geometrical nonlinear stability of cabletruss domes with different cable distributions. The results indicate that the critical load increases evidently when cables, especially diagonal cables, are distributed in the structure. The critical loads of the structure at different rise-span ratios are also discussed in this paper. It was shown that the effect of the tensional cable is more evident at small rise-span ratio. The buckling of the structure is characterized by a global collapse at small rise-span ratio; that the torsional buckling of the radial truss occurs at big rise-span ratio; and that at proper rise-span ratio, the global collapse and the lateral buckling of the truss occur nearly simultaneously. Project (No. 50278086) supported by the National Natural Science Foundation of China