一类递归编程的特殊方法探讨

介绍了递归模型的一般形式、递归程序的执行过程及递归程序设计.重点从数学公式的角度探讨了复杂递归问题的一类特殊编程方法及其应用.     

纳米金与二茂铁在葡萄糖传感器中的相互作用

针对纳米金颗粒修饰的葡萄糖生物传感器对葡萄糖的响应电流随着工作电压的下降快速下降的问题,进一步利用电子媒介体二茂铁对其进行修饰,并选用丝网印刷电极研究了纳米金颗粒和二茂铁之间的相互作用。实验结果表明:二茂铁有效地降低了纳米金颗粒修饰的葡萄糖生物传感器响应电流的下降值,纳米金颗粒降低了电子媒介体二茂铁的氧化还原反应电位,并且,纳米金颗粒与电子媒介体二茂铁在葡萄糖生物传感器中表现协同增效效应。     

TMS320C28x模数转换器的精度校正

TMS320C28x系列DSP内部集成ADC转换模块,为提高ADC转换精度,对TMS320F2812的ADC模块转换误差及其影响进行分析测试,提出一种用于提高ADC模块精度的校正算法。实际应用证明使用该方法补偿效果良好,有效改善ADC的转换精度,并具有普遍性。     

安全信息计算机管理系统软件设计及应用

介绍安全信息化监督管理软件的开发,利用计算机网络技术将ORACLE与DELPHI有机地结合起来。     

基于van der Waals状态方程的剩余自由能模型

结合 Wong- Sandler的混合规则 ,即在无穷大压力下剩余 Helmholtz自由能与无穷小剩余 Gibbs自由能近似相等的关系 ,给出了一个基于 van der Waals状态方程的剩余自由能模型 ,由此得到可以描述汽液相平衡的活度系数模型。通过对 35个体系的考核表明 ,该模型可以较好的关联实验数据 ,包括极性与极性物系 ,其结果好于 Wilson、Mar-gules、NRTL与 Uniquac等模型的计算结果。同时 ,因为该模型基于 Wong- Sandler的混合规则 ,因此可以实现在理想溶液中 ,由 Wong- Sandler混合规则到 van der Waals混合规则平滑过渡。     

英语测试改革初探--英语测试中增加口试的改革实践

从理想的英语测试体系及英语测试现状谈英语测试改革的必要性,从我校英语测试改革实践及成效论在英语测试中增加口试的可行性.     

Optimal power control system of a research nuclear reactor

The power control system is a key control system for a nuclear reactor, which directly concerns the safe operation of a nuclear reactor. Much attention is paid to the power control system performance of nuclear reactor in engineering. The designers put a high value upon design of an optimal power control system. In this paper, a design method is applied to the design of power control system. According to the optimal control theory, an objective function, quadratic performance index with weight factors is proposed. Then, the objective function is transformed into frequency domain form by use of Paserval's theorem. In frequency domain, an optimal transfer function can be obtained at the lowest value of objective function. The system with optimal transfer function has an optimal performance. The transfer function of the power control system is derived from a typical research nuclear reactor. Using the state feedback theory, the transfer function is synthesized to the optimal transfer function. The simulative results with the optimal controller and with a conventional controller show that the performance of the optimal power control system is largely improved on dynamic characters. The method applied here not only can be used for research nuclear reactor but also can be easily extended to pressurized water reactor power plant and other fields.     

宽带接入技术及其比较

章介绍了基于LAN、PSTN、光纤、同轴电缆和无线的多种宽带接入技术，对其性能、优劣势进行了分析、比较，为运营商、开发商和用户选择接入方式提供了依据，也为开发更好的接入技术提供了参考。     

一种智能仪器仪表的通用人机接口方案

讨论了智能仪器仪表人机接口的交互式方案，将LCD显示屏划分为运行模式、预置参数、运行参数、提示信息等4个显示区，采用优先权编码器作为键盘编码器，按键读数直接送至MCU，实现了占用单片机I／O口线少、占用单片机机时少、简化相应程序等最优设计。     

UV-vis and photoluminescent spectra of TiO<Subscript>2</Subscript> films

TiO₂ fims have been deposited on glass substrates using DC reactive magnetron sputtering at different oxygen partial pressures from 0. 10 Pa.to 0.65 Pa. The transmittance (UV-vis) and photoluminescence (PL) spectra of the films were recorded. The results of the UV-vis spectra show that the deposition rate of the films decreased at oxygen partial pressure P(O₂)≥0.15 Pa, the band gap increased from 3.48 eV to 3.68eV for direct transition and from 3.27 eV to 3.34 eV for indirect transition with increasing the oxygen partial pressure. The PL spectra show convincingly that the transition for films was indirect, and there were some oxygen defect energy levels at the band gap of the films. With increasing the O₂ partial pressure, the defect energy levels decreased. For the films sputtered at 0.35 and 0.65 Pa there were two defect energy levels at 2.63 eV and 2.41 eV, corresponding to 0.72 eV and 0.94 eV below the conduction band for a band gap of 3.35 eV, respectively. For the films sputtered at 0.10 Pa and 0.15 Pa, there was an energy band formed between 3.12 eV and 2.06 eV, corresponding to 0.23 eV and 1.29 eV below the conduction band. ZHAO Qing-nan : Born in 1963 Funded by Natural Science Foundation of Hubei Province, China.