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利用聚变系统分析程序在大半径与小半径之和保持不变的条件下,通过优化聚变-裂变混合堆中心螺管尺寸,对紧凑型聚变-裂变混合堆发电成本进行了优化分析,并找出其最佳设计点,计算结果表明该堆具有较好的经济优势. 相似文献
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能源是国民经济的基础产业和战略性资源,是保障和促进经济增长与社会发展的重要物质基础。四川作为西部的第一经济大省和强省,要实现工业化和城市化的战略目标,必须以能源产量的增长来保障GDP增长目标的实现。基于这一背景,刘朝明教授以其主持的有关项目取得的研究成果为基础,出版的《四川省能源需求预测与开发战略研究》一书具有十分重要的现实意义。 相似文献
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Magnetic anisotropy manipulation and interfacial coupling in Sm3Fe5O12 films and CoFe/Sm3Fe5O12 heterostructures 下载免费PDF全文
The magnetic anisotropy manipulation in the Sm3Fe5O12 (SmIG) films and its effect on the interfacial spin coupling in the CoFe/SmIG heterostructures were studied carefully. By switching the orientation of the Gd3Ga5O12 substrates from (111) to (001), the magnetic anisotropy of obtained SmIG films shifts from in-plane to out-of-plane. Similar results can also be obtained in the films on Gd3Sc2Ga3O12 substrates, which identifies the universality of such orientation-induced magnetic anisotropy switching. Additionally, the interfacial spin coupling and magnetic anisotropy switching effect on the spin wave in CoFe/SmIG magnetic heterojunctions have also been explored by utilizing the time-resolved magneto-optical Kerr effect technique. It is intriguing to find that both the frequency and effective damping factor of spin precession in CoFe/SmIG heterojunctions can be manipulated by the magnetic anisotropy switching of SmIG films. These findings not only provide a route for the perpendicular magnetic anisotropy acquisition but also give a further path for spin manipulation in magnetic films and heterojunctions. 相似文献
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High-Power Continuous-Wave Diode-End-Pumped Intracavity Frequency Doubled Nd:YVO4 Laser at 671 nm with a Compact Three-Element Cavity 总被引:2,自引:0,他引:2 下载免费PDF全文
We report a high-power high-efficient continuous-wave (cw) diode-end-pumped Nd:YVO4 1342-nm laser with a short plane-parallel cavity and an efficient cw intracavity frequency-doubled red laser at 671 nm with a compact three-element cavity. At incident pump power of 20.6 W, a maximum output power of 7 W at 1342 nm is obtained with a slope effciency of 37.3%. By inserting a type-Ⅰ critical phase-matched LBO crystal as intracavity frequencydoubler, a cw red output as much as 2.85-W is achieved with an incident pump power of 16.9 W, inducing an optical-to-optical conversion efficiency of 16.9%. To the best of our knowledge, this is the highest output of diodepumped solid-state Nd:YVO4 red laser. During half an hour, the red output is very stable, and the instability of output power is less than 1%. 相似文献
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分子生物学“中心法则“揭示了DNA→RNA→蛋白质的遗传信息流的深刻内涵,它是现代基因工程技术发展的基础.最近研究表明,信使RNA在蛋白质合成中,不但表现出一维序列上的对应,且在两者的空间构象上也表现出某些对应关系.这为细胞因子等蛋白多肽类生物制药的工艺改进提供了科学依据. 相似文献
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以Struts框架构建Web系统的安全性设计 总被引:2,自引:0,他引:2
Struts是基于Servlet,Jsp以及标签库技术的一个实现良好的MVC框架,可以更快的利用MVC理论进行Web系统的设计和开发,对于任何一个完善的Web系统来说,安全性设计都是一项重要的内容,文章介绍了Struts框架,以及在该框架下实现的Web系统中,如何实现安全性设计. 相似文献