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刘芬 《和田师范专科学校学报》2007,27(3):231-231
高校作息时间系统的开发为了实现教学时间控制由人工管理向智能控制转变,在开发的过程中涉及到多条时间记录的存取问题.本文就这一方面提出了几种对多条记录存取的实现方式,通过列举说明每种方式的特点,以此为我们开发作息时间系统提供有利的依据。 相似文献
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薛锦 《福建师大福清分校学报》2005,16(1):63-68
本文从语言心理学的角度,分析一些口误和笔误的数据对比英汉口笔误的特点.并以此来探究英汉心理词典中储存状况;同时从认知实验的研究成果进一步阐释英语和汉语的储存结构的异同。 相似文献
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研究了周期系统中电磁场的储能问题以及周期系统中的功率流,为分析周期系统中的各种电磁现象提供了能量守恒的依据. 相似文献
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采用密度泛函理论研究了钴掺杂氨硼烷分子(Co-NH3BH3)在结构和能量方面的变化.首先对氨硼烷分子在不同波函数基组下进行优化.然后,将Co掺杂在优化后的氨硼烷分子中,计算Co掺杂后对氨硼烷分子的影响.结果表明,当钴掺杂之后,氨硼烷分子中氢原子Mulliken电荷变化明显,氢原子稳定性变差,体现了钴作为催化剂对氨硼烷分子的影响. 相似文献
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Arun Kumar B. S. Dhillon D. N. Rao Geetha Menon Hari Shankar L. K. Dhaliwal Maiti Leema Nomita Chandhiok Neeta Kumar Rohini Sehgal Suneeta Mittal Sumitu Sahdev Kandpal Shobha V. L. Jindal 《Indian journal of clinical biochemistry : IJCB》2012,27(4):405-409
Malondialdehyde (MDA) is widely used as oxidative stress biomarker in biomedical research. Plasma is stored in deep freezers generally till analysis. Effect of such storage on MDA values, which may be variable and prolong, was incidentally observed in the ongoing study which is to estimate oxidative stress with oral iron. Plasma from blood samples of pregnant women (20–30 years age) in third trimester of singleton pregnancy (n = 139), consuming oral iron tablets was stored at −20 °C with intention of MDA estimation, as soon as possible. However logistic problems led this storage for prolonged and variable period (1–708 days). When values of MDA estimated using “Ohkawa” 79 method and readings were plotted against time to check the temporal effect, it showed a hyperbolic curve. Standard deviation (SD) was lowest when samples were tested within 3 weeks time. The samples analyzed within 3 weeks had mean ± SD value of 31.59 ± 26.11 μmol/L, while 123.7 ± 93.97 and 366.5 ± 189.8 μmol/L for samples stored for 1–3 and 4 months to 1 year respectively. Mean ± SD were 539.9 ± 196.8 in the samples store for more than a year. Rate of change in values was also lowest (0.0433 μmol/L/day) in the samples tested within first 3 weeks, which rose to 1.2 μmol/L/day during 3 month’s storage. This rate peaked at storage of 120 days (1.87 μmol/L/day) and fell to 0.502 μmol/L/day in the second year of storage. It is concluded that at −20 °C, only 3 weeks of storage time should be considered valid for fairly acceptable stability in MDA values. 相似文献
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虚拟存储技术在未来数字图书馆中的应用 总被引:8,自引:0,他引:8
分析目前国内外几种有代表性的虚拟存储技术模型和所涉及的相关协议。介绍该技术在国家数字图书馆中的应用设想。探讨虚拟存储技术的应用将对国内数字图书馆产生的深远影响。 相似文献