低比转速高速液氮离心泵的设计与试验研究.rar

本文件规定了通过使用原料氨或离解氨来进行气体氮化低合金钢和工具钢的程序和要求。其他合金和钢族（例如，不锈钢）也可以使用公认的工程组织可接受的参数进行氮化。

150W, AC-19.5VDC PFC+LLC Demo Board This design uses a Critical Conduction Mode (CrCM/DCM) PFC (AC-400 VDC), followed by an LLC DC-DC (400-19.5 VDC). For both stages, the switching frequency was increased to the maximum allowed by the off-the-shelf control ICs available. The board is designed to be a ‘demonstration’ board, and is not yet optimized as a production design. With this design, a power density of 1.56 W/cc or 25.5 W/in3 is achieved, which is around 2x typical and 40% more than the best-on-class Si-based design today. Customer designs are expected to achieve even higher power density.

采用锌-柠檬酸铵溶液还原体系，从偶氮苯制备氢化偶氮苯。选取偶氮苯与锌粉的物质的量比、饱和柠檬酸铵溶液的稀释倍数、柠檬酸铵溶液的用量及水浴温度作为影响产率的主要因素，采用四因素三水平的正交表L9(34)设计实验，确定了最佳反应条件：偶氮苯与锌粉物质的量比为1∶4(偶氮苯0．625mmol)，稀释1．0倍的饱和柠檬酸铵溶液的用量为2．0mL，水浴温度82．0℃，反应时间约4min，收率为86．4％．

低温液氮离心泵的研制.rar

复合氮化硅陶瓷刀具在渣浆泵工艺中的应用.rar

附录4－3氮氧化物排放._ODName附录4-3 氮氧化物排放.xls

灵活型加氢裂化技术加工高氮环

第5讲 硫和氮的氧化物.pdf

模拟温室气体排放和农田N平衡的模型。目前DNDC 9.2在世界范围内已得到广泛验证，是做温室气体排放和C和N循环模拟值得尝试的模型之一。