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Variability is a common phenomenon in AGN and is observed over wide range from radio to X-ray .

光变是活动星系核的普遍现象，从射电到X射线的所有波段都观测到了活动星系核的光变。

How did the second AGN remain hidden for so long ?

第二个活动星系核是如何保持隐藏了这么久？

Research on Characteristic of Multi-band Spectral Energy Distribution and Evolution of AGN

AGN的多波段性质与演化研究

There are three basic models to interpret the observed AGN variability .

目前，有三种基本的理论模型可以解释活动星系核的光变。

AGN changes in the optical spectra and light changes between standard Is there some relationship ?

活动星系核的光学谱变化与光变时标之间是否存在某种关系？

The steps and methods of how to use the AGN to model an FAS were studied .

研究了AGN用于柔性装配系统（FAS）的建模的方法和步骤。

AGN Variability and Spectral Slope Variability in the Optical Band

活动星系核在光学波段的光度及光谱斜率变化

Structure function and auto-correlation function are major tools for studying the variability properties of AGN samples .

结构函数和自相关函数等是研究活动星系核样本光变性质的主要方法。

The results show that these two models can qualitatively explain the AGN variability in the optical band .

结果表明：这两种模型是定性解释活动星系核光学波段光变的合理模型。

Objective To study the clinical significance of the IgG in urine in acute glomerulonephritis ( AGN ) .

目的探讨小儿急性肾小球肾炎（AGN）尿IgG测定的临床意义。

EGRET has detected 66 AGN with high reliability .

EGRET已检测到66颗可信度很高的活动星系核。

It provides a powerful tool for constraining the physical mechanisms and models of the central engine of AGN .

光变对活动星系核中心区域的物理机制和理论模型作了有力的限定。

We weren 't seeing many double AGN , so we turned to Chandra for help .

“我们没有看到很多双活动星系核，所以我们求助于钱德拉”。

This highlights the critical importance of high-resolution observations at high X-ray energies in locating binary AGN .

这显示在二进制活动星系核的定位在高X射线能量高清晰度观测至关重要。

The conclusion is : the short term variability behavior provides a strong support to the thick accretion disk model of AGN .

这些讨论表明，活动星系核的短时标光变特征对厚吸积盘模型提供了强有力的支持。

Quasars and Seyfert galaxies are two types of AGN .

类星体和Seyfert星系是两类AGN。

In this present paper , we focus on the radiative processes of AGN , especially blazar 's jets mostly discussed yet .

在本文中，我们主要关注讨论得最多的活动星系核，特别是blazar天体中的喷流过程。

The content of SOD was significantly lower in PNS and AGN groups than in the control group ( P < 0 . 05 ) .

PNS组和AGN组全血SOD均显著低于对照组（P＜0.05）；

Radio images of egret detected Agn

EGRET检测到的γ射线活动星系核的射电图像

The Unified Scheme of AGN can be used to explain many physical properties reasonably , but has yet to be further observations and confirmation .

统一模型能够对AGN的物理性质作出比较合理的解释，但还需进一步的观测和证实。

Both AgN and DAB had good antimicrobial effectiveness in clinical used concentration and obviously increased the early take rate of CEA on wound beds .

AgN和DAB在临床使用浓度时抗菌效果较好，以此分别准备烧伤或肉芽创面，显著地提高了CEA早期成活率。

The Unified Schemes of AGN

活动星系核的统一模式

On the other hand , galaxy-mass black holes are found in Active Galactic Nuclei ( AGN ) .

另一种有星系质量大小的黑洞常发现存在于活跃的星系核心（AGN）。

The Mass Relation between the Black Hole and the Bulge for AGN ; a satellite with sensors to detect nuclear explosions .

活动星系核中黑洞与核球质量关系研究有探测核辐射的传感器的卫星。

The AGN apparently produces the seed radio photons and the X-ray photons or shock waves need to pump the maser material .

所有超脉泽星系显示出核的活动，显然，脉泽是由核活动所产生的射电和X射线光子或激波来抽运的。

Wedding Ceremony on the " Milky Way " Ferryboat The Mass Relation between the Black Hole and the Bulge for AGN

银河号上的婚礼活动星系核中黑洞与核球质量关系研究

Quasars is one category of active galactic nuclei ( AGN ), which is can be detected in the most distance so far .

类星体是活动星系核（AGN）的一种，是我们迄今为止探测到的最遥远的天体。

The survey is sensitive to AGN up to650 million light-years away and has uncovered dozens of previously unrecognized systems .

这项调查是敏感的活动星系核高达650亿光年远，并发现了先前未知的系统几十人。

In this paper , using disk-instability model and starburst model , the AGN optical variability and spectral slope variability are simulated and confronted with observations .

本文中我们利用盘不稳定模型和星爆模型的基本思想，模拟活动星系核在光学波段的光度和光谱斜率变化，并将模拟的结果和观测进行比较。

Objective : To investigate the role of nitric oxide ( NO ) and tumor necrosis factor α( TNF α) in the pathogenesis of acute glomerulonephritis ( AGN ) .

目的：探讨血清一氧化氮（NO）和肿瘤坏死因子α（TNFα）在小儿急性肾小球肾炎（AGN）中的作用及其相互关系。