根据用户隐式反馈建立和更新用户兴趣模型

提出一种通过获取用户的隐式反馈信息建立和更新用户兴趣模型的方法．这种方法不需要用户显式地提供兴趣信息，只要通过观察用户在浏览Web页面时所采取的动作来获取隐式的反馈信息，并利用这些信息建立与更新用户兴趣模型，从而减轻用户的负担．     

f2组态离子在三角配位场中的库仑矩阵元计算

通过选用与群链[(OD3C3)×SU(2)]N相匹配的单电子基矢,使其直积构成多电子fN体系的D3C3旋量群的不可约表示的基矢,并讨论了有关的Coulomb矩阵元的计算.     

基于4f5d能级的Pr3+∶ZBLAN上转换紫外光纤放大器

运用稳态粒子数速率方程和传播方程理论, 研究Pr³⁺∶ZBLAN光纤中基于 4f5d能级的上转换紫外光纤放大器的激光动力学过程. 计算了输入信号饱和功率、 输出功率、 斜率效率和最佳光纤长度等参量, 并与光纤振荡器的结果做了比较. 结果表明, 输入信号存在一个饱和功率, 大于该值时, 输出功率基本上与输入信号功率无关. 信号光饱和功率约为3 mW, 且几乎不随泵浦功率和光纤长度变化. 在相同条件下, 放大器输出功率和斜率效率可达到振荡器的2~3倍. 利用光纤放大器可有效提高Pr³⁺∶ZBLAN光纤4f5d上转换紫外激光器系统的输出功率和斜率效率.     

按严格递归法则生成的多重分形及其谱维数方程

本文在给出了广义Ｈａｕｓｄｏｒｆｆ维数定义的基础上得到了按严格递归法则生成的多重分形的谱维数Ｄｑ＝Ｄ（ｑ）的一般函数关系式─谱维数方程．作为谱维数方程的应用，得到了一维Ｃａｎｔｏｒ集的Ｄｑ谱和ｆ（ａ）谱的解析表达式     

矿井用压力变形仪

对所设计的单片机控制智能矿压仪的硬件电路及控制处理软件进行了详尽的论述．该仪器主要用于测试综合采煤设备顶板压力和活柱下缩量，进行连续测量和数据存贮，并用ＰＣ机进行数据处理与打印．     

利用大失谐的Jaynes-Commings模型实现薛定谔猫态的隐形传态

提出了利用一个二能级原子与腔场的相互作用,通过大失谐的J-C模型来隐形传输腔场的薛定谔“猫态”的方案．在此方案中我们只需要一个二能级原子和两个单摸腔场,而不需要其他的辅助粒子．     

MSP430F413在射频卡水表中的应用

TI公司的MSP430F413是一种超低功耗性能的单片机。基于MSP430F413的超低功耗功能,以e5550射频卡为信息传输媒介,实现家用水表低功耗设计的水表预付费控制器。     

Hierarchical recognition on the taxonomy of <Emphasis Type="Italic">Nitzschia closterium</Emphasis> f. minutissima

Nitzschia closterium f. minutissima, a marine eukaryotic unicellular diatom, originally classified as Bacillariophyta/Bacillariophyceae/Bacillariales/Bacillariaceae/Nitzschia, is one of the most important feed sources in mariculture. In this study, its morphological features were examined under DIC Microscopy （differential interference contrast microscope）; its pigments and fatty acids composition were analyzed by using High Performance Liquid Chromatography （HPLC） and gas chromatography （GC）; the complete Actin cDNA, part 18S rDNA, complete ITS1 and ITS2 sequences, part 28S rDNA sequences, and a putatively encoding A5 fatty acid desaturase gene were cloned respectively and further functioned in transgenic yeast. The sequence alignments were separately conducted using the related sequences from Nitzschia closterium f. minutissima, Cylindrotheca closterium （Bacillariophyta/Baci- Ilariales/Bacillariaceae/Cylindrotheca） and Phaeodactylum tricornutum （Naviculales） with ClustalX 1.83. No distinct difference was discovered between N. closterium f. minutissima and P. tricornutum in both biochemical and molecular level. Their identity was more than 99.6% among 18S rDNA, 5.8S rDNA and actin-gene sequences, and is up to 98.6% even among ITS1 and ITS2 sequences. Their △5 desaturase similarity was 99.4%. However, the lower similarity was disclosured between N. closterium f. minutissima and Cylindrotheca closterium, which shared less than 40% identity in the ITS1 and ITS2 sequences. So, N. closterium f. minutissima should not be placed in Bacillariales, Bacillariaceae, Nitzschia, but in Naviculales, Phaeodactylaceae, Phaeodactylum, and it was actually a strain of P. tricornutum.     

点正则变换下Woods-Saxon势映射Pschl-Teller I势

利用在点正则变换下形状不变势的映射方法,给出了Woods-Saxon势和Pschl-Teller I势之间的点正则变换关系,并由Pschl-Teller I势的束缚态能级和波函数求得了Woods-Saxon势的束缚能级和波函数.     

求解VLSI不可二划分布图规划问题的混合遗传算法

超大规模集成电路(VLSI)布图规划是VLSI物理设计的关键环节之一,对集成电路的芯片面积、线长等性能指标有重大影响.基于B*-tree的结构表示,结合遗传算法的思想,提出一种用于解决VLSI不可二划分布图规划问题的混合遗传算法,并用MCNC标准测试例子对所设计的算法进行测试,证明该算法的有效性.