液蜡分离单体烃工艺的研究

C12H26，C13H28，C14H30等正构烷烃是重要的化工原料，可通过液蜡精馏得到。文章对液蜡精馏的工艺设计进行探讨，对影响工艺的参数进行了比较，寻找出精馏工艺的较佳方案，并通过了生产实践的检验。     

具有大电流输出能力的开关电源

本文介绍大电流输出的开关电源芯片MAX1623的特点，设计原理和典型应用电路。     

从四氢呋喃、甲醇、水三元混合物系中分离四氢呋喃的研究

叙述了以液—液萃取、间歇精馏为手段，从四氢呋喃、甲醇、水三元混合物系中分离四氢呋喃的方法。四氢呋喃纯度超过９８％，收率６４．８％。     

单塔精馏生产优级品乙酸的研究

用理论计算与实验相结合的办法 ,采用单塔精馏生产优级品乙酸 ,以降低能耗 ,减少物料损失 ,提高产品收率 ,缩短生产周期 ,避免了双塔精馏所造成的设备与能源的浪费。在国内首次成功研究了单塔精馏生产优级品乙酸的生产工艺。     

采用同步整流技术的反激逆变器研究

本文提出了一种新型的单级式隔离逆变电路——反激逆变器，较传统的两级式逆变器，拓扑结构大大简化，在小功率尤其是低压大电流场合中的应用具有明显的优势。文中介绍了该电路的工作原理以及电路主要参数的设计。为了减小在低压输出场合中整流二极管的导通损耗，本文提出了一种同步整流的控制策略，有效地提高了整机效率。仿真分析和实验验证了该新型电路以及同步整流控制策略的可行性。     

Spin-filter silicene devices induced by asymmetric electrodes

Using nonequilibrium Green's function in combination with the density functional theory, we investigate the spin-dependent transport properties of three silicene-based heterojunctions. The calculated results show that the heterojunctions are promising multifunctional devices in spintronics due to their nearly perfect bipolar spin-filter effect and high rectification ratio. Also shown are the obvious negative differential resistance behaviors for both spin channels. By analyzing the spin-resolved transmission spectra and the band structure of ZSiNR electrodes, as well as the spatial resolved local density of states, the mechanisms for these intriguing properties are demonstrated in detail.     

Controllable memristive patterns in poly(9,9-dioctylfluorene)-based sandwich device

Currently, there are two prevalent types of I-V memristive patterns for memristive applications, 0-type and 8-type hysteresis loop, and their respective characteristics result in their specific applications in different situations, such as data storage and neuromorphic computing. In spite of the abundant achievements of these remarkable performances, scarce works are specially concerned about the relations and regulations between them for persuing the multiple functions in a single element, and an ideal platform with both the achievements and controllable transformations has been rarely reported. Herein, the novel organic material—poly(9,9-dioctylfluorene) (PFO) is utilized to construct the sandwich prototype. The electrical transporting properties are systematically investigated through particular programming protocols. The 0-type and 8-type memristive patterns are successfully obtained during low and high voltage sweeps, respectively. Then the sectionalized fitting results of the current curves, the carrier transporting behaviors as well as the regulations of device energy levels are associatively demonstrated to analyze the electrical activity-dependent transformations between different memristive patterns. More importantly, the appearance of the 8-type hysteresis loop can be regulated by the rectification property, and the rectification can be largely enhanced by the reconfiguration of device energy levels. Consequently, for the versatile memristive device, based on the 0-type hysteresis, it can serve as a data storage or artificial synapse element, and the rectification-modified memristive behaviors can effectively impede the unintended sneak current paths for high-density integration.     

含醇污水甲醇回收工艺技术探讨

天然气开发过程中伴随着大量的污水采出,这些污水除了含有矿物质、悬浮物、机械性杂质及乳化油等,同时还含有人们在井筒和地面管线中定期加注一定量的水合物抑制剂甲醇溶液。甲醇具有剧毒,直接排放会造成严重的环境污染,为了节能环保,含醇污水必须进行甲醇回收。重点探讨了苏里格气田污水的预处理工艺以及双塔精馏工艺流程,分析了预处理药剂及用量的问题,介绍了双塔精馏装置操作及常见的操作问题,为现场人员的操作提供一定的指导。