对薄板理论中两个边界条件的商榷

本文发现在涉及经典板理论的著作中,给定两正交自由边交点B的自由角点的边界条件R_B=0是不正确的。联系Kirchhoff变换的正确运用,本文提出了一个正确的自由角点条件R_B=2(M_(xy))_B,并以同理给出一个新的广义简支边的边界条件。     

SOME REFLECTIONS CONCERNING VALENCE VARIATION AND ATOMIC STRUCTURE

In bringing to a conclusion these few scattered reflections concerning valence variation and atomic structure, may I be permitted to say this: He who is experimentally inclined may henceforth take heart and he need not be quite so timid in interpreting strange chemical reactions on the assumption of possible anomaly in the valence of the reactants. The physicist has no hesitation in speaking of the temporary existence, at the higher temperature employed in spectroscopic work, of such molecules as BaCl, AlO, (HO), CH(+), CH(2), MgF, etc. Is it not possible that under the influence of surface forces somewhat similar valence variation may not be excluded even at lower temperatures? That these strange compounds are thermodynamically unstable may be true. Nevertheless, they may function as the mysterious catalysts, or as initiators of chain reactions.     

围护结构冷辐射对人体热舒适的影响

本文以Ｆａｎｇｅｒ热舒适方程以及热舒适评价指标ＰＭＶ为理论依据,对不同墙体结构、外围护结构面积、室外采暖温度的房间模型中各种不同位置的人体舒适性进行了计算分析,并计算出一定条件下保持人体热舒适所需的室内温度,着重揭示了冬季外围护结构内表面冷辐射对人体舒适性的影响,从而为暖通设计人员选择合理的室内采暖参数提供了理论依据。     

水田垄作制和平作制中水肥输运的模拟及机理分析

水田垄作制中,水、肥的定向有序输运较平作制中的混乱无序扩散优越,这正是垄作制较平作制省水、省肥,能大幅度增产的重要原因之一。