激发条件

Among the large number of nonlinear absorbers, the material applied most extensively is phthalocyanine reverse saturable absorption compound which is organic large molecule with central symmetry two-dimensional π-electron conjugate system. In the off-resonance condition, its absorption coefficient will raise along with the increasing of incoming light intensity, which shows its reverse saturable absorption properties.

在非线性光学材料中目前最具应用价值的是酞菁类的反饱和吸收材料，这是一类具有中心对称二维π电子共轭体系的有机大分子，在非共振激发条件下，吸收系数往往会随入射光强的增加而增加，体现反饱和吸收。

This method is for measuring photoconductive phaseshift of spreading resistance under a point contact.

这方法是测量触针下分布电阻的光电导相位移，在不同的表面情况和不同的激发光光谱成分下，导得各种结果表达式，文中对通常所使用的测量条件即粗磨表面和长波激发条件给出数值计算的结果。

The powder method is found to be satisfactory with a medium quartz spectrograph and an activated a.

采用了交流电弧碳电极粉末法，应用现有的设备(中型光谱仪、不纯碳电极、质量低的照相板)进行试验，找出了比较适当的激发条件和分析线对。

Firstly, the principle of SPR and its exciting conditions are respectively discussed in the paper.

首先，本文研究并讨论了表面等离子体波共振效应的原理及其激发条件。

The teachability, which is a problem of driving the states of a hybrid system to a given region, is realized by designing a state feedback controller of Petri net, the firing conditions of transitions and the controller of the continuous system.

研究了系统的可达性问题，通过设计受控Petri网状态反馈控制、变迁的激发条件和连续系统的控制器，实现系统的可达性，即驱动混合系统的状态进入某一预先给定的状态区域。

The influence of acidity on fluorescence and absorption spectra were investigated. Using quinine bisulphate as a reference, fluorescence quantum yield of aesculin in the condition of pH=4.96 was determined to be 0.76 at excitation wavelength 335nm, and in pH=9.40 was 0.80 at 375nm.

探讨了酸度与浓度对其荧光和吸光性质的影响，以硫酸奎宁为参比，测得秦皮甲素水溶液的两种强荧光型体的荧光量子产率，在pH=4.96，激发波长335nm条件下，荧光量子产率为0.76；在pH=9.40，激发波长375nm条件下，荧光量子产率为0.80。

So when choose the stimulated energy the certain at the same time make sure the characteristic frequency of the eradiate photons, both for a mineral is constant.

所以在选定激发能量的同时确定发射光子的特征频率，两者对于一个矿物来说都是固定不变的，因而用它就可以直接获得矿物在不同激发条件下的释光谱图。

In order to improve the accuracy of spectrochemical analysis of high speedsteels, a systematic study of the effect of different excitation conditions and di-fferent micro-structures of the samples on the accuracy of analysis has been made.

为了提高高速钢光谱分析的准确度，在本文中比较系统地研究了激发条件和样品的组织结构对于准确度的影响。

The results show that with a sudden mechanical vibration, regardless can whether the rock contains quartz, a strong enough electromagnetic radiation signal can be generated and received by the new system.

并且在机械振动激发条件下，无论岩石是否含有石英，都会产生足够强的电磁辐射信号。

The results of the study showed that:① Using dozens of kilograms of explosives the signal can be detected at distances up to 200 km;②Active source has a certain degree of repeatability among different shots;③This paper presents the following shooting mode and signal detection method based on the similarity of different shots: In light of the similarity between the signals of big shot and small shot, this paper presents a cross-correlation method using signal from big shot signal with high SNR and small shot signal to detect weak small shot signal, the method can effectively detect the small shot signal and pick up the start time of phase, this method can help us make full use of past seismic exploration data records.

野外实验采用1次大当量激发和16次小当量激发，研究结果表明：①有可能利用数十公斤当量的炸药实现200km距离的探测；②在激发条件相同时，不同当量的激发波形滤波后存在一定的相似性；③依据人工震源可重复性采用以下的激发组合方式和处理方法能够有效提高信噪比：针对大当量激发与小当量激发波形的相似性，利用大当量激发的波形作模板与小当量激发的波形作相关，可判断台站是否接受到小当量激发的信号并检测其震相到时信息。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。