在Pt／Al2O3催化剂上苯深度氧化的内扩散影响

测定了苯深度氧化的催化剂有效因子,其值在0.49～0.97之间。用近似方法计算了η的理论值。联合使用显式Adams-Bashforth和隐式Adams-Moulton数值解,得到O_2在催化剂孔内的分压分布。     

Pigeon milk: A new source of growth factor

Crude, partially purified and purified fractions of pigeon milk injected subcutaneously in newborn mice brought about precocious opening of eyelids by 2–3 days and eruption of incisors by 3–4 days. The biological activity of pigeon milk-derived growth factor (PMGF) compared well with that of mouse epidermal growth factor (mEGF).     

吕梁山土壤侵蚀成因规律及发展趋势研究

严重的土壤侵蚀是导致吕梁山区经济落后的根本原因，土壤侵蚀的形成是自然、人为因素综合作用的结果，其空间分布具有一定的规律性，时间的序列性，侵蚀方式的迭加性；研究现状、分析成因规律是为了更好地预测未来，吕梁山未来侵蚀发展趋势如何，关健在予软资源(意识行为、政策方针、管理等)配置是否合理．     

Prediction Method of Vessel Maintenance Outlay Based on the BP Neural Network

1 .ＩＮＴＲＯＤＵＣＴＩＯＮＦｏｒｍｅｒｌｙ ,ｔｈｅｍａｎａｇｅｍｅｎｔｏｆｖｅｓｓｅｌｏｕｔｌａｙｕｓｅｄｔｏｐａｙｍｏｒｅａｔｔｅｎｔｉｏｎｔｏｔｈｅｄｅｖｅｌｏｐｍｅｎｔｏｆｖｅｓｓｅｌｅｑｕｉｐｍｅｎｔａｎｄｔｈｅｉｎｖｅｓｔｍｅｎｔｉｎｐｕｒｃｈａｓｉｎｇ ,ｂｕｔｉｇｎｏｒｅｓｏｍｅｐｒｏｂｌｅｍｓｏｆｔｈｅｏｕｔｌａｙｓｐｅｎｔｏｎｔｈｅｕｓｅ ,ｍａｉｎｔｅｎａｎｃｅ ,ｅｔｃ .ｏｆｔｈｅｅｑｕｉｐｍｅｎｔ .Ｉｎｇｅｎｅｒａｌ,ｔｈｅｔｉｍｅｏｆｕｓｉｎｇｖｅｓｓｅｌｅｑｕｉｐｍｅｎｔｉ…     

火焰原子发射光谱法测定水中钾钠影响因素的探讨

文章对采用火焰原子发射光谱法测定水中钾钠存在的诸多影响因素和干扰问题进行了试验与探讨，得出了较准确的测定条件和数据。     

详细规划设计中的经济分析初探

社会主义市场经济要求城市规划设计进行经济分析。文章从影响投资效益因素分析入手，探讨了投资效益的指标及计算方法。     

煤矿矸石山喷爆的形成机制与影响因素

煤矿矸石山喷爆、是煤矿生产中常见的一种灾害。笔者通过灾害个案调查，从通风、降雨、挖掘三个角度探讨了喷爆的形成机制，较为系统地分析了喷爆的影响因素。矸石山中硫化物、油页岩、残存煤等可燃物的成分、含量及聚集状态，矸石的力学性质、破碎程度、堆积形式等是矸石山喷爆的内部原因；通风、降雨、气温、挖掘等燃烧条件的改善，是矸石山喷爆的外部原因。通过本文的分析与研究，旨在加深对矸石山喷爆的认识。为其灾害的预防与治理奠定基础。     

Neuroendocrine control of carbohydrate metabolism in the freshwater bivalve molluscLamellidens marginalis

Summary Blood sugars and foot muscle glycogen were measured in the mussel,L. marginalis after ablation of the cerebral ganglia, and in mussels injected with cerebral ganglionic extract 3 h after ablation. There is a rise in the blood sugar and decrease in foot muscle glycogen 3 h after operation, but no change in sham-operated controls. The effect of ablation is reversed by injecting brain extract into ablated mussels. No such effect could be seen in the controls. The results are suggestive of the presence, in the cerebral ganglia, of a hypoglycaemic factor similar to insulin.     

催化剂颗粒中的Dirichlet问题

用二维的正交配置法求解有限长圆柱体催化剂颗粒中的Dirichlet问题。计算催化剂的有效因子。方法简便,结果合理。