核反应中两坐标系之间的关系

本讨论了核反应中的速度、动量、能量等物理量在实验室和质心两坐标系之问的换算关系，使实验值和理论值可以进行比较。     

InP材料UV激光直接刻蚀研究

利用UV激光的光解剥离(APD)效应,对半导体材料InP进行了直接刻蚀研究,获得了良好的结果。采用波长为308nm,光脉冲宽度20ns的XeCl)准分子激光器,APD刻蚀的光能量密度阈值为390mJ/cm~2;与理论结果相比较,两者具有良好的一致性。同时给出了刻蚀深度与脉冲速率及脉冲时间的实验曲线。     

小波分析在信号消噪中的应用浅析

本文简述了小波分析的基本原理和方法，在Matlab语言的基础上，对小波分析在信号消噪中的应用进行了探讨。     

非相干解调器门限的计算及降低之途径

本文认为信号的峰值和噪声的“峰值”相等是非相干解调器出现门限的临界点。据此算得FM波非相干解调器的门限值为dB,AM波的为4.3dB。最后还指明了降低非相干解调器门限值的途径。     

1.3μm InGaAsp/Inp DCC结构对激光器阈值和T_0值的影响

研究了 1 .3 μmInGaAsp InpDCC结构中间夹层厚度对激光器阈值和T0 值的影响 ,并得到了最佳的夹层厚度     

基于小波分析的信号消噪法

采用一种基于非线性阈值决策的小波去噪法，并就阈值的选取进行了说明，然后进行了理论分析和计算机仿真实验，取得了较满意的结果。     

一种改进型的多级关联规则挖掘算法

对经典算法ML—T2的剪枝策略进行了详细的研究，并针对其剪枝过程中存在的问题提出一种改进型的多级关联规则算法IML。     

Ventricular fibrillation threshold during acute ischemia in hypertrophied rat hearts

Summary Ventricular fibrillation threshold was significantly lower in hypertrophied hearts than in normal hearts. Ischemia produced by coronary occlusion reduced fibrillation threshold in both normal and hypertrophied hearts, but the maximum reduction in fibrillation theshold was observed earlier in hypertrophied hearts.     

The dental amalgam issue. A review

Summary Using an interdisciplinary approach, the current position in the dental amalgam controversy and the potential impact of amalgam mercury on human health are reviewed. Aspects of materials science, corrosion, mercury exposure, toxicology, neurology and immunology are included.New data on mercury exposure from corroded amalgam fillings in vivo are presented. The exposure can reach levels considerably over known threshold limit values. Also, measurements of mercury absorption from intraoral air are presented. The vital importance of avoiding a galvanic amalgam-gold coupling is emphasized. The symptomatology of a disabled patient, who recovered after amalgam removal, has been included.It is concluded that discussion of the dental amalgam issue has suffered from the lack of an interdisciplinary approach. It would be wise to learn from the lesson of acrodynia, and consider amalgam mercury among other possible factors in neurological and immunological diseases of unclear etiology.     

一种新的水平集停止项函数选取方法研究

现今的停止项采用的全局阈值法很难使经典水平集算法得到较准确的分割效果。为此,构建了一个新的停止项函数,该函数在梯度较小时为一个常数,超过某个阈值后为单调递减函数,直至到某个梯度时递减为零。这保证了采用该函数的水平集方法能够实现在同质区加速演化,在边缘区停止演化的目的。实验结果表明,采用新的停止项函数能够使水平集方法获得更好的分割结果。