Deformation Effect on the Center-of-Mass Correction Energy in Nuclei Ranging from Oxygen to Calcium

The microscopic c.m. correction energies for nuclei ranging from oxygen to calcium are systematically calculated by both spherical and axially deformed relativistic mean-field （RMF） models with the effective interaction PK1. The microscopic c.m. correction energies strongly depend on the isospin as well as deformation and deviate from the phenomenological ones. The deformation effect is discussed in detail by comparing the deformed with the spherical RMF calculation. It is found that the direct and exchange terms of the c.m. correction energies are strongly correlated with the density distribution of nuclei and are suppressed in the deformed case.     

博物馆展厅与库房空气中有害气体的测定与除去研究

用被动采样和主动采样测定了中国钱币博物馆部分展厅内二氧化硫和二氧化氮的浓度； 采用三乙醇胺浸润过的定量滤纸吸收室内空气中的二氧化硫，用三乙醇胺、饱和碳酸钠溶液浸润过的定量滤纸吸收二氧化氮， 研究其吸收特性。     

Robust adaptive matched field processing with environmental uncertainty

The main challenges on detection and localization of quiet targets in littoral regions for passive sonar are the complicated acoustic propagation and the prevalence of loud ship interferences on the surface. Adaptive matched field processing can provide the ability to null surface interferences, but the mismatch between the computed and actual array steering vectors due to environment uncertainty, and the motion of both targets and interferences can result in loss of array gain significantly. To address the problem of environmental mismatch and target motion, a robust motion compensation algorithm and a system scheme for adaptive matched field processing have been developed. Both Numerical simulation and analysis of experimental data demonstrates that the robust AMFP scheme could suppress surface loud interferences and improve the detection performance for underwater weak moving targets in complex shallow water.     

LD泵浦Cr∶YAG被动调Q556nm黄光激光器

通过对谐振腔镜镀制合理的激光薄膜,成功实现了LD泵浦Nd∶YAG1.112μm激光谱线的运转.利用LBO腔内倍频Nd∶YAG/Cr∶YAG结构获得了高重复频率被动调Q556nm全固态黄光激光器,在注入泵浦功率为1.6W时,得到平均功率51mW,脉冲宽度48ns,重复频率8.9kHz,峰值功率高达119W的脉冲黄光输出.     

一种实时高精度的机器人用超声波测距处理方法

本文提出了一种适用于可移动智能机器人定位，测障及简单形体识别的实时，高精度超声测距处理方法，介绍了以单片机实现该方法在超声测距系统，该方法既能６ｍ以保证测距误差不大于０．１３％，又提高了超声波距的实行性（３５ｍｓ）。     

被动光学限幅器的机制与研究进展

被动光学限幅器是利用介质的非线性光学性质实现对光的强度进行控制的器件，它在科研，军事和民用方面都具有广泛的应用，文章讨论了被动光学限幅器的反饱和吸收，双光子吸收，自由载流子吸收，非线性折射，光致散射和光折变机制，每种机制在光限幅器应用中的有效性及局限性，介绍了国内外研究状况及自己的工作；指出了今后被动光学限幅器研究的发展方向。     

用Cr4+∶YAG晶体实现Nd3+∶YAG 0.946 μm激光被动调Q运转

以Cr4+∶YAG晶体作为可饱和吸收体 ,氙灯作为抽运源 ,实现了Nd3 +∶YAG晶体在 0 946 μm波长处的调Q运转。激光脉冲宽度为 38ns ,能量为 1 7mJ。     

时间压缩式相关器/延迟线IC设计

相关器、延迟线在信号处理领域中有着非常广泛的应用.但到目前为止尚没有看到这类集成电路 的报道.依据[1]文提及的新型时间压缩式相关器,本文给出了通用相关器/延迟线的专用集成电路设计,该集成电路(IC)可以完成极性相关和多比特相关、同时还可以作为延迟线应用,可构成768级以下任意长延时,在8kHz采样频率下单片IC最大延时可达96ms.此IC可以多片应用,满足不同场合的应用要求.     

Diode-Pumped Self-Starting Mode-Locked Nd：YVO4 Laser with Semiconductor Saturable Absorber Output Coupler

By using a semiconductor saturable-absorber output coupler as a mode-locking device, we experimentally realized the operation of a diode-pumped passively mode-locked Nd:YVO4 laser. Stable laser pulses with duration of 2.3ps were generated at the output power of about 1W. With increasing the pump power to 9 W, the maximum mode-locked power of 1.7 W was obtained, which corresponds to a slope conversion efficiency of 44 % and opticalto-optical conversion efficiency of 19%.