电路实验教学改革与素质教育的探讨

论述了进行电路实验教学改革是培养高素质通信人才的关键举措。指出要进行电路实验教学改革首先要实现教学观念的变革，要把培养学生的创新精神作为实验教学改革的目标，采用分层次实验教学和开放式实验教学等方法，建立适应实验教学的成绩评定标准等措施，逐步将电路实验室建成培养高素质创新人才的基地。     

Apply geometric duality to energy-efficient non-local phenomenon awareness using sensor networks

A powerful concept to cope with resource limitations and information redundancy in wireless sensor networks is the use of collaboration groups to distill information within the network and suppress unnecessary activities. When the phenomena to be monitored have large geographical extents, it is not obvious how to define these collaboration groups. This article presents the application of geometric duality to form such groups for sensor selection and non-local phenomena tracking. Using a dual-space transformation, which maps a non-local phenomenon (e.g., the edge of a half-plane shadow) to a single point in the dual space and maps locations of distributed sensor nodes to a set of lines that partitions the dual space, one can turn off the majority of the sensors to achieve resource preservation without losing detection and tracking accuracy. Since the group so defined may consist of nodes that are far away in physical space, we propose a hierarchical architecture that uses a small number of computationally powerful nodes and a massive number of power constrained motes. By taking advantage of the continuity of physical phenomena and the duality principle, we can greatly reduce the power consumption in non-local phenomena tracking and extend the lifetime of the network.     

Fluorescence spectra of ARE2I5 and AREI3 in the solid state (A ≡ K, Rb, Cs, Ti; RE ≡ Sm, Eu)

The fluorescence spectra of ARE₂I₅(s) and AREI₃(s) (A ≡ K, Rb, Cs, Tl; RE ≡ Sm₁ Eu) have been studied systematically. The regular shift of the central wavelengths is discussed in a preliminary manner on the basis of crystal lattice field and covalence effects.     

Using thermally stimulated currents to find defective capacitors

BaTiO₃ multilayer capacitors with a nominal capacitance of 3.5nF have been carefully measured using the thermally stimulated current (TSC) technique. When a 300V polarization voltage is applied at room temperature, a new TSC peak appeared in defective sample A after it has been immersed in water. No new peak was found in good-quality sample B after a similar treatment. The accelerated life test shows that sample A hasa much shorter life than sample B in terms of insulation resistance.     

分压式电阻测量的闭环负反馈方法

提出一种反馈分压式电阻测量方法，给出了两种改进方案，分析了它们的测量误差，指出了减小误差的途径和方法。     

嘉陵江上游区滑坡泥石流预警信息系统初步研究

本文在嘉陵江上游区滑坡泥石流预警网络的基础上,结合我国及嘉陵江上游区的具体情况和经济承受能力,提出了嘉陵江上游区滑坡泥石流预警信息系统的基本结构、内容、运行原理。此系统的建立对于当地的减灾、防灾和经济发展具有重要意义。     

油显示分析仪测定有机碳的替代容量分析

本介绍油显示分析与容量分析中非水滴定测定的有机碳结果对比及替代建议。统计结果，两种方法分析结果是等效的，具有相同的精度。     

精密深孔表面环状硬挤条纹的产生机理与控制

本文建立了不同条件下环状硬挤条纹的生成模型,详细分析了其产生机理.用理论解析和试验验证了所建模型的可靠性,最后提出了控制其产生的方法.     

天然糖甙类化合物^13C—NMR位移范围规律的计算机解析方法

本文从糖甙类化合物的数据特点出发,用较严格的数学推导总结出原则上适用于任何类型的~(13)C-NMR 图谱化学位移范围规律计算机自动解析的方法,并从多方面说明了该方法的研究及实现对实际的~(13)C-NMR 图谱解析工作的意义和重要作用。