多目标规划的Johri对偶形式

通过约束集合和目标函数的改变构造单目标规划的对偶规划,利用多目标与单目标规划的关系,构造多目标规划的Johri对偶形式,证明了对偶定理.     

具有竞争机理局部稳定的两种群模型及其保解析性

通过对一类具有竞争机理局部稳定的两种相互作用生态种群模型保解析性的讨论，进一步将生态环境系统的调控严谨化，给一类生态系统的动态分析与调控优化提供了一种有价值的方法与手段．这不仅对于两种互相竞争和互惠互存的生态系统的建模与分析具有重要意义，而且对于更为复杂的生态环境系统的动态分析与宏观调控也具有较大的指导作用与应用价值．     

森林致命性病虫害模型的解及稳态分布

在一定条件下得到定常同龄纯林致命性病虫害的林龄结构模型解的存在唯一性，给出解的解析表达形式，并计算出模型的稳态分布     

非自治的离散Smith方程的全局吸引性

QinqinZhang和ZhanZhou在文献 [1]中获得了方程xn+ 1=xnexp(rn(1-xn) )收敛于 1的充分条件。离散的非线性型Smith方程中 {rn}为一个非负实数序列 ,k ,β∈ (0 ,+∞ ) ,初值x0 >0 ,从而获得了满足条件的Smith方程的任意解{xn}关于正平衡解k全局吸引的充分条件是 : ∞n =0rn =∞且Lim　n∞suprn ≤ 2。其结果推广了文 [1]等的结果。     

共存组分参与的反应的平衡处理

共存组分参与的反应的化学平衡，是把组分与共存组分的生成物作为反应物，再与另一组分反应处理的。其平衡常数等于组分间反应的平衡常数与组分和共存组分的平衡常数之比。     

累积平衡常数在无机化学中的应用

本文运用热力学知识对多重平衡的累积平衡常数的数学表达式进行了证明，并对其应用提出新的看法．     

复合萃取剂醋酸乙二醛液液相平衡研究

研究了复合萃取剂醋酸乙二醛三元体系在 2 5℃时的液液相平衡关系 ,通过自动电位滴定仪测定了两平衡相中醋酸的含量 ,用浑浊法测定了体系的分层曲线 ,并绘出了三元相图。从三元相图看 ,复合萃取剂具有良好的萃取性能。     

Reconceptualising equilibrium in Boltzmannian statistical mechanics and characterising its existence

In Boltzmannian statistical mechanics macro-states supervene on micro-states. This leads to a partitioning of the state space of a system into regions of macroscopically indistinguishable micro-states. The largest of these regions is singled out as the equilibrium region of the system. What justifies this association? We review currently available answers to this question and find them wanting both for conceptual and for technical reasons. We propose a new conception of equilibrium and prove a mathematical theorem which establishes in full generality – i.e. without making any assumptions about the system׳s dynamics or the nature of the interactions between its components – that the equilibrium macro-region is the largest macro-region. We then turn to the question of the approach to equilibrium, of which there exists no satisfactory general answer so far. In our account, this question is replaced by the question when an equilibrium state exists. We prove another – again fully general – theorem providing necessary and sufficient conditions for the existence of an equilibrium state. This theorem changes the way in which the question of the approach to equilibrium should be discussed: rather than launching a search for a crucial factor (such as ergodicity or typicality), the focus should be on finding triplets of macro-variables, dynamical conditions, and effective state spaces that satisfy the conditions of the theorem.     

力平衡式传感器在力测试系统实验的应用

将力平衡式传感器应用于力测试系统实验 ,可使测量精度、灵敏度和稳定性等指标大大提高。文章阐述了将涡流传感器、激振器以及力平衡式传感器用于力测试系统的测量原理和实验过程     

二甲基二氯硅烷-二甲基二乙氧基硅烷二元体系等压汽液平衡研究

利用新型泵式沸点仪,在101.3kPa下测定了二甲基二氯硅烷-二甲基二乙氧基硅烷二元体系汽液相平衡数据,并对二甲基二乙氧基硅烷的临界性质进行了估算,分别用Wilson,NRTL,Margules,Van Laar四种模型进行了关联,结果令人满意.