浮体升沉和纵摇运动对甲板上浪载荷影响数值研究（英文）

In this paper,the influence of heave and pitch motions on green water impact on the deck is numerically investigated.The vessel motions are determined using a potential theory based method and provided as input to finite volume based CFD computations of green water phenomenon.A dynamic mesh approach is adopted to determine instantaneous body positioning in the fluid domain.Detailed validation studies with published experimental results for 2D and 3D fixed vessel cases are initially performed to validate the present numerical approach before studying the moving vessel problem.The results show that inclusion of heave and pitch motion changes the disturbed wave field near the bow which influences the free surface as well as the impact loading due to green water.The effect of wave steepness on green water impact is also investigated and it is seen that the present numerical method is capable of capturing green water load.It is observed that the effects of vessel motions on green water load are not negligible and one should consider this effect too.The incorporation of vessel motions in the vertical plane affects the green water loading on the deck.

间接液化的生物工艺

0 引言由来自煤的煤气和甲醇生物合成液体燃料的方法对于发展高选择性、高效率的煤液化工艺具有很大的潜力。大量的诸如一氧化碳、氢气、二氧化碳和甲醇之类的碳一原料能够从煤或天然气等矿物燃料中得到。这种间接液化技术的焦点集中在两个阶段的厌氧生物转化上。第一阶段是通过适应于一氧化碳的甲基营养的丁酸杆菌(Butyribacterium methylotro--phicum)把合成气体(CO,H_2/CO_2)转化成为挥发性脂肪酸。第二阶段是通过乙酰丁基型梭状芽孢杆菌(Clostridium acetobutylicum)把脂肪酸生物转化成为可燃的丙酮、丁醇和乙醇溶剂。酸性基因细菌能将一氧化碳或甲醇直接转化成为乙酸酯(acetate)和丁酸酯(butyrate)而不消耗合成气中的氢。所需要的氢来自于水而无须进行转换反应。

提高载重轮胎的燃油经济性和使用寿命（译文）

含纤维的弹性体的增强作用组合了橡胶的弹性和增强纤维的强度及刚度。用连续纤维来增强弹性体众所周知，但是这种类型的混和物主要限用于轮胎的特定部位（如胎体，带束层或胎冠层）、胶管和运输带。用连续性纤维增强的弹性体无法用作复杂形状（如胎面、花纹基部护胶）的胶料。