A/O法废水处理碱源的研究与实践

从理论到实践阐述了以具有价格优势的 Na OH替代 Na2 CO3做碱源 ,解决 A / O法运行成本高的问题。     

Structural characterization of 1,2-polybutadiene by 13C-n.m.r. spectroscopy: 2. Sequence distribution of 1,2-unit in hydrogenated polybutadienes

The configurational sequences of 1,2-unit in a series of hydrogenated syndiotactic 1,2-polybutadienes were determined in relation to the sequence distribution of 1,2- and 1,4-units on the basis of the ¹³C-n.m.r. signal assignment of the methyl carbons. The observed triad distributions of 1,2- and 1,4-units and configurational distributions of the 1,2-unit are in good agreement with the calculated distributions from transition probabilities. The number average sequence lengths of the 1,2-unit and the 1,2-unit in the racemic addition are 5.7 to 8.0 and 4.1 to 5.4, respectively. From the extrapolation of the plot of the number average sequence length against the crystallinity of the starting 1,2-polybutadienes, the minimum sequence length for crystallization is estimated to be 3.7 for the 1,2-unit in the racemic addition.     

冰箱门面板冲压工艺分析及模具设计

分析冰箱门面板的冲压工艺,介绍模具设计中应注意的问题及滚压式结构的特点     

加强环滚弯成形工艺及锻模设计

通过对加强环零件的分析 ,确定了合理的加工原材料规格、成形工艺方案和锻模结构 ,解决了原生产过程中存在的材料浪费、加工困难等问题 ,提高了经济效益。     

线材轧制技术的新进展

介绍了ＤａｎｉｅｌｉＭｏｒｇａｒｄｓｈａｍｍａｒ公司与Ｍｏｒｇａｎ公司提供的线材生产的新设备、新技术。并对其做了分析比较，特别对实现无序轧制多品种生产进行了讨论，指出新型高效线材轧机、高速切头飞剪和相关技术的采用，将推进线材轧制技术的新进展。     

20G高压锅炉管裂纹原因分析

对20G高压锅炉管产生裂纹的原因进行了分析，结果表明是冷拔工艺不当所致。     

Achievements and developing trend of welding technology in Chinese shipbuilding

ＡｃｈｉｅｖｅｍｅｎｔｓａｎｄｄｅｖｅｌｏｐｉｎｇｔｒｅｎｄｏｆｗｅｌｄｉｎｇｔｅｃｈｎｏｌｏｇｙｉｎＣｈｉｎｅｓｅｓｈｉｐｂｕｉｌｄｉｎｇ￥ＺＨＯＵＧｕｏｓｈｅｎｇａｎｄＷＵＪｉｎｇ（ＳｃｉｅｎｃｅａｎｄＴｅｃｈｎｏｌｏｇｙＢｕｒｅａｕｏｆＣＳＳＣ...     

Effect of surface modification of metal hydride electrode on performance of MH/Ni batteries

A novel method was applied to the surface modification of the metal hydride(MH)electrode of MH/Ni batteries.Both sides of the electrode were plated with a thin silver film about 0.1μm thick using vacuum evaporation plating technology,and the effect of the electrode on the performance of MH/Ni batteries was examined.It is found that the surface modification can enhance the electrode conductivity and decrease the battery ohimic resistance.After surface modification,the discharge capacity at 5C(7.5A)is increased by 212 mA.h and the discharge voltage is increased by 0.11 V,the resistance of the batteries is also decreased by 32%.The batteries with modified electrode exhibit satisfactory durability.The remaining capacity of the modified batteries is 89%of the initial capacity even after 500 cycles.The inner pressure of the batteries during overcharging is lowered and the charging efficiency of the batteries is improved.     

表用步进电机铁芯冲压工艺及模具设计

介绍了几种进口生产线的铁芯冲压工艺和模具结构 ,对进口铁芯的冲压工艺和模具结构进行了分析,给出了适合国内中小企业使用的模具结构和制造工艺     

薄壁防渗墙施工工艺

结合建造薄壁防渗墙工程实例,通过分析几种施工工艺的成墙原理和优缺点,合理选择薄壁防渗墙施工工艺。