两等同双能级原子与三模腔场任意多光子共振相互作用辐射谱的一般特征

本文研究了两个偶极——偶极力关联的等同双能级原子与三模腔场间任意多光于共振相互作用的辐射谱。对三模腔场分别处于不同数态:即三模均为真空场、三模均为强场、一模为真空场两模为强场以及两模为真空场一模为强场时辐射谱的结构特征及物理特性进行了详细分析,从而揭示出“三模腔场——两原子系统”的多光子辐射谱的一般特征。     

非线性光学有机分子吸收光谱的测定及跃迁偶极矩的计算

通过测定两种具有D—π—D结构的有机分子的吸收谱,并根据三能级模型对其跃迁偶极矩进行了计算.并从结构-性质的关系对其高阶非线性光学效应进行了预测,认为这两种分子将会具有较大双光子吸收截面.     

基于调制重叠双正交变换的扩频通信非正交型窄带干扰抑制

Traditional lapped transform domain excision techniques obtain good performance at the expense of increased processing delay. Extension of transform domain filtering techniques to the lapped biorthogonal transform domain can help solve the problem. By incorporating biorthogonality into the lapped transforms, more flexibility is obtained in the design of windows. Thus transform bases with better stopband attenuation can be generated by designing windows, but not by increasing the overlapping factor. In this paper, a new modulated lapped biorthogonal transform (MLBT) with optimized windows is introduced for efficient compression of multi-tone interfering signal energy. The bit error rate (BER) performance of the receiver employing the proposed MLBT excision technique is analyzed and compared with that of the lapped transform domain excision-based receivers. Simulation results demonstrate the improved performance and increased robustness of the proposed technique.     

电视高频信号源的混合设计与应用

本文简述了电视高频信号与电视标准测试信号的混合使用，通过工程实践，分析并比较两种信号源的频谱分布结构情况，为两种信号的合理混合应用提出可行的设计方案。     

同步检波器的计算机虚拟仿真实验

以同步检波器解调DSB、SSB信号为例,提出利用电子仿真软件Multisim8.0进行计算机虚拟仿真作为高频电子线路实验的辅助手段,阐述计算机虚拟仿真的效果和结果.     

Test and Analysis of an Existing Tunnel Vibration Induced by Blasting Construction of Diaphragm Wall

According to the blasting construction of the diaphragm wall of Puxi approaching section of East Fuxing Road river-crossing tunnel, the monitoring project of the vibration of the existing tun-nel induced by the blasting construction is put forward, which includes the sensors’ location, moni-tor method and the vibration monitoring system. Based on the monitoring data of the explosion vibration, the vibration wave forms, velocities, acceleration responses, main frequencies and fields of measure points are analyzed under the conditions of three locations and different charge quanti-ties. According to the safety-judging standard of explosion vibration, the conclusion that the exist- ing tunnel is safe under the explosion vibration is then drawn. Furthermore, the spectrum character-istics of three explosion vibrations and the spectrum changing properties of explosion vi-bration wave transmitting in different directions are concluded, which can provide reference to similar projects.     

人类科学中的新极限论（I）

从新构建的基础理论学的角度,在无穷观及与之密切相关的数量体系的理论框架中讨论人类科学中长期被忽视的现有极限论的基础问题,得到“经典无穷理论体系基础理论中的本质性缺陷决定了人类不可能在经典无穷理论体系的框架中构建科学的极限论,而新无穷观和与之密切相关的新数谱的产生为极限论的体系性和基础理论奠定了新的、牢固的基础,决定了新极限论的产生”的明确结论．     

WCDMA上行链路扩频调制的仿真与研究

介绍了第三代移动通信系统WCDMA扩频调制的原理及操作过程,利用MATLAB工具建立了WCDMA的上行链路扩频调制过程的仿真模型,最后给出了各个处理阶段信号的频谱图等仿真结果,并进行了分析,得出利用OVSF扩频码进行扩频调制能够很好地解决不同业务传送及多用户干扰的问题。     

基于System View的扩频通信中同步的仿真

PN码序列的同步是扩频系统所持有的,也是扩频技术中的难点。本文根据扩频通信中同步的基本原理,利用滑动相关法实现PN序列码的同步,采用Svstem View软件对其进行仿真验证。     

^11B^35Cl和SiC的势能函数

采用从头计算的方法研究了^11B^35Cl和SiC的结构和势能函数。对基态的^11B^35Cl,采用的是CISD／6—311＋G＊的方法。对基态的SiC分子采用的是B3LYP／6—311＋＋G＊＊的方法。根据CISD方法（对^11B^35Cl）和B3LYP方法（对SiC）的计算结果,采用最小二乘法拟舍出了Murrell-Sorbie势能函数的参数。并得出了力常数和光谱数据。