塞曼效应实验中CCD线阵相对位置的讨论

塞曼效应实验中,分裂谱线的波长或波长差是通过测量干涉环的直径来实现的。直径可以用光强分布曲线对应的左右两个峰的位置差求得。本文通过讨论得到结论:当CCD线阵不经过圆心时对测量结果不产生影响。     

Narrow-band interference suppression in Time-Division-Duplex CDMA systems using preprocessing techniques

This letter presents two preprocessing techniques for narrow-band interference （NBI） rejection in Time- Division-Duplex （TDD） CDMA systems. In the proposed methods, at the transmitter, by using Karhaunen-Loeve Transform and Discrete Fourier Transform, the transmitted power is set to zero in the directions of the eigenvectors that will be severely contaminated by NBI; and therefore less part of the transmitted energy will be polluted by NBI in channel. The processing is transferred from receiver to transmitter, and thus the complexity of the receiver is significantly reduced. It is assumed that channel state information can be estimated at the transmitter because in symmetric TDD systems each receiver in turn also acts as a transmitter.     

A Contact and Non-Contact Hybrid Profilometer with Large Range

A novel hybrid instrument of contact and non-contact measurement with large range is developed, and both measurement systems are based on a Linnik interference microscope and on white-light interference measuring techniques. The ambiguity presented in conventional monochromatic interferometers is not present in the contact and non-contact measurement, and they have a virtually unlimited unambiguous range. For the contact measurement, the vertical measuring range is ±5 mm with a resolution of 1 nm and the horizontal measuring range is ±25 mm in x-range and y-range with a resolution of 1.25 μm; for the non-contact measurement, the vertical measuring range is ~5 mm with a resolution of 1 nm and the horizontal resolution better than 0.5 urn.     

光的相干条件

较详细地理论上讨论了光的相干条件，包括必要条件，补充条件，时间相干性和空间相干性。     

双向载荷对双共线裂纹干涉J积分的影响

利用二维弹塑性有限元，计算了双向载荷下双共线裂纹干涉不同路径Ｊ积分值并与单向载荷Ｊ积分值作了比较。结果表明：材料进入塑性后横向载荷对Ｊ积分值的影响必须考虑，且材料进入塑性后Ｊ积分的路径无关性已很难保证。     

Blind Equalization Algorithm Based on MCMA and DSE-CMA

A new blind equalization algorithm based on the modified constant modulus algorithm （MCMA） and dithered signederror constant modulus algorithm （DSE-CMA） is proposed. This dithered signed-error MCMA （DSE-MCMA） can not only reduce the computational complexity, but also recover the phase rotation in the complex channel. Simulation results have verified the analysis and indicated the good property of DSE-MCMA.     

高内涵筛选NF-κB信号通路的技术体系建立

NF-κB是参与免疫调节、炎症反应、肿瘤发生等过程重要的转录因子,在TNFα、IL-1β、LPS等因子诱导下NF-κB发生核转位并激活其转录活性。尝试利用高内涵筛选(High Content Screening,HCS)和RNA干扰(RNAinterference,RNAi)技术建立NF-κB核转位高通量筛选体系,该体系的应用将有助于发现新的NF-κB信号通路调节因子,为免疫与肿瘤的机制研究提供线索。     

利用MATLAB GUI模拟双缝干涉

在光的干涉基本理论的基础上,根据干涉实验装置建立了相应的数学模型,利用MATLAB GUI工具对杨氏双缝干涉实验进行计算机仿真.仿真界面丰富直观,可以直接在界面输入和改变参数而不需要改变原程序,直观地分析各参数对干涉这一抽象、复杂的物理现象的影响.为光学理论分析与实验教学提供了方便,为相关课件的设计提供了新的途径.