排序方式: 共有41条查询结果,搜索用时 7 毫秒
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Intensification of methane and hydrogen storage in clathrate hydrate and future prospect 总被引:1,自引:0,他引:1
Gas hydrate is a new technology for energy gas (methane/hydrogen) storage due to its large capacity of gas storage and safe. But industrial application of hydrate storage process was hindered by some problems. For methane, the main problems are low formation rate and storage capacity, which can be solved by strengthening mass and heat transfer, such as adding additives, stirring, bubbling, etc. One kind of additives can change the equilibrium curve to reduce the formation pressure of methane hydrate, and the other kind of additives is surfactant, which can form micelle with water and increase the interface of water-gas. Dry water has the similar effects on the methane hydrate as surfactant. Additionally, stirring, bubbling, and spraying can increase formation rate and storage capacity due to mass transfer strengthened. Inserting internal or external heat exchange also can improve formation rate because of good heat transfer. For hydrogen, the main difficulties are very high pressure for hydrate formed. Tetrahydrofuran (THF), tetrabutylammonium bromide (TBAB) and tetrabutylammonium fluoride (TBAF) have been proved to be able to decrease the hydrogen hydrate formation pressure significantly. 相似文献
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时距信息加工的认知研究 总被引:20,自引:2,他引:20
黄希庭 《西南师范大学学报(自然科学版)》1993,(2)
概述了时距信息加工的三个认知模型(存储容量模型、加工时间模型、变化/分割模型)的理论要点.用已有的实验材料分析了它们的预测效度,提出了进一步研究该问题的设想.作者认为,上述三个认知模型对理解人类时距观念的形成都作出了自己特殊的贡献,但需要加以发展. 相似文献
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高密度光学全息存储技术的新进展:向光盘存储挑战 总被引:6,自引:0,他引:6
光全息存储的独特优点,尤其是体全息存储的高容量和高数据传输速率,使光全息存储最有希望成为下一代海量存储技术。通过与现有的光盘和磁盘存储技术的对比,介绍了全息存储的原理和材料,以及在这一活跃的研究领域中的新进展,特别是为了提高存储容量和抑制串象噪音所发展起来的各种全息复用技术。对全息存储技术取得实用性进展的前景也作了简略讨论。 相似文献
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为满足现代高分辨率雷达大容量高速缓存以及被动雷达和时差定位系统采样预触发的需要,提出了采用多片先进先出(FIFO)芯片级联的硬件结构实现可编程采样预触发和缓存容量扩展.分析了两级FIFO级联时芯片间接口的时序,给出了对FIFO可编程标志位的设置方法.实际应用证明,采用该结构可使系统的缓存容量达到2 MB,预触发量达到1 MB,且两种功能可由FPGA控制切换.该结构也适用于其它具有可编程标志的FIFO. 相似文献
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