x-ray
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X-ray and Near-IR Variability of the Anomalous X-ray Pulsar
a r X i v :0707.2093v 2 [a s t r o -p h ] 17 D e c 2007Accepted in ApJ,2007December 2
Preprint typeset using L A T E X style emulateapj v.10/09/06
X-RAY AND NEAR-IR VARIABILITY OF THE ANOMALOUS X-RAY PULSAR 1E 1048.1?5937:FROM QUIESCENCE BACK TO ACTIVITY
Cindy R.Tam,1Fotis P.Gavriil,2,3Rim Dib,1Victoria M.Kaspi,1,4Peter M.Woods,
5,6Cees Bassa,1
Accepted in ApJ,2007December 2ABSTRACT We report on new and archival X-ray and near-infrared (near-IR)observations of the anomalous X-ray pulsar 1E 1048.1?5937performed between 2001-20
Automatic physical phasing X-ray crystallography
Phase invariants are important pieces of information about the atomic structures of crystals. There are several mathematical methods in X-ray crystallography to estimate phase invariants. The multi-wave diffraction phenomenon offers a unique opportunity of
AutomaticphysicalphasingX-raycrystallography
S´ergioL.Morelh ao,1, LuisH.Avanci,1andStefanKycia2
12
arXiv:cond-mat/0409487v1 [cond-mat.mtrl-sci] 19 Sep 2004
InstitutodeF´ sica,UniversidadedeS aoPaulo,CP66318,05315-970S aoPaulo,SP,Brazil
Laborat´orioNacionaldeLu
X-Ray衍射分析思考题
X-Ray衍射分析思考题
1-1 X射线与可见光相比有何异同及特点?这些特点将带来一些什么重要作用与用途。 1-2 解释为什么会有吸收限,在X射衍射中吸收限的应用有哪些? 1-3 试解释X射线与物质发生相互作用时的光电效应。
1-4 X射线管中产生的连续谱和标识谱与电学参量之间有什么关系?如何控制X射线管的电学参 量以达到改变X射线波长和强度的目的。 1-5 连续谱和标识谱各有哪些规律,试解释之。
1-6 研究纯铁时该用什么靶和滤波片,不能用什么靶。 1-7 X射线与物质发生的相互作用有哪些。 1-8 X射线光管的组成包括哪几部分。 1-9 获得X射线必须具备哪些基本条件。
1-10 标识谱的波长与阳极物质的原子序数的关系是什么。
1-11 欲使钼靶所发射的X射线能激发放置在光束中的铜块发射K系荧光辐射,必须施加的电压 是多少,所发射的荧光辐射的波长是多少。
1-12 Co Ka射线滤波器通常是由氧化铁(Fe2O3)粉末制成,假使滤波器含有Fe2O3为5mg/cm2, 求Co Ka线透射因子(IX/I0)以及IX/I0=0.5时的厚度。 2-1 空间点阵与晶体结构的关系是
2-2 晶体宏观对称变换可归纳为哪四种。
X-RAY - Dage - XD7500保养手册 - 图文
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Fitting the spectrum of the X-ray background the effects of high metallicity absorption
Recent work by Risaliti et al.(1999) suggests that more than half of all Seyfert 2 galaxies in the local universe are Compton-thick (N_H > 10^24 cm^-2). This has implications for AGN synthesis models for the X-ray background (XRB), the flexibility of which
Mon.Not.R.Astron.Soc.000,000–000(0000)Printed1February2008
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FittingthespectrumoftheX-raybackground:thee ects
ofhighmetallicityabsorption
R.J.WilmanandA.C.Fabian
InstituteofAstronomy,MadingleyRoad,CambridgeCB30HA
1February2008
arXiv:astro-ph/9907204v1 15 Jul
Image definition evaluation functions for X-ray crystallography a new idea on the phase problem
Image definition evaluation functions for X-ray crystallography: A new perspective on the
phase problem
Hui LI*, Meng HE* and Ze ZHANG
Beijing University of Technology, Beijing 100124, People’s Republic of China
CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for
Nanoscience and Technology, Beijing 100190, People’s Republic of China
Zhejiang University, Hangzhou 310014, People’s Republic of China
Correspondence e-mail: huilicn@ mhe@
In memoriam of Ms. Guang-Lian Tian
05/March/2015
Abstract
The core them
Constraints on Type Ia Supernova Models from X-ray Spectra of Galaxy Clusters
We present constraints on theoretical models of Type Ia supernovae using spatially resolved ASCA X-ray spectroscopy of three galaxy clusters: Abell 496, Abell 2199 and Abell 3571. All three clusters have central iron abundance enhancements; an ensemble of
ConstraintsonTypeIaSupernovaModels
fromX-raySpectraofGalaxyClusters
RenatoA.Dupke&RaymondE.WhiteIII
UniversityofAlabama,Tuscaloosa,AL35487-0324
arXiv:astro-ph/9907343v1 25 Jul 1999ABSTRACTWepresentconstraintsontheoreticalmodelsofTypeIasupernovaeusingspatiallyresolvedASCAX-
Mental - Ray - 教程精解
Mental ray是一个专业的3D渲染引擎,它可以生成令人难以置信的高质量真实感图象。现在你可以在3D Studio的高性能网络渲染中直接控制Mental ray 。
它在电影领域得到了广泛的应用和认可,被认为是市场上最高级的三维渲染解决方案之一。原来它一直是Softimage标榜自己身价的重要筹码,现在已经被好
心的软件商移植到了3 D Studio MAX上,其无缝的集成使3D Studio MAX的用户只需进行简单的学习就可以使用。也就是说现在在Max中你也能得到和在
Softimage中一样的高质量的渲染质感。
我们先来看一看Mental Ray的主要概念和功能:
1. 接近现实的快速反射效果Reflection(支持Ray Tracing贴图);
2. 接近现实的快速折射效果Refraction(支持Ray Tracing贴图);
3. 运动模糊(Motion Blur),特别是能够生成阴影的运动模糊;
4. 能渲染出原来只有在Video Post里才能实现的景深效果(Depth of Field );
5. 智能光全局照明Global Illumination,光线扩散(radiosity)使物体自身表面的色
V-Ray常用参数详解 精华总结
前言:本文是在学习VRAY中根据各种书面教程和视频教程总结的内容包括材质、灯光、渲染等,参考了VR帮助、黑石教程和印象教程,尽量把各类参数的具体设置做了补充,以供以后巩固理解。 一、帧缓冲器 解析:
1、启用内置帧缓冲器。勾选将使用VR渲染器内置的内置帧缓冲器,VR渲染器不会渲染任何数据到max自身的帧缓存窗口,而且减少占用系统内存。不勾选就使用max自身的帧帧缓冲器。 2、显示上一次VFB: 显示上次渲染的VFB窗口,点击按钮就会显示上次渲染的VFB窗口。 3、渲染到内存帧缓冲器。勾选的时候将创建VR的帧缓存,并使用它来存储颜色数据以便在渲染时或者渲染后观察。如果需要渲染高分辨率的图像时,建议使用渲染到V-Ray图像文件,以节省内存 4、从MAX获得分辨率:勾选时VR将使用设置的3ds max的分辨率。
5、渲染到V-Ray图像文件:渲染到VR图像文件。类似于3ds max的渲染图像输出。不会在内存中保留任何数据。为了观察系统是如何渲染的,你可以勾选后面的生产预览选项。
6、保存单独的渲染通道:勾选选项允许在缓存中指定的特殊通道作为一个单独的文件保存在指定的目录。
二、全局设置 解析: 1、几
Testing Mass Varying Neutrino With Short Gamma Ray Burst
In this paper we study the possibility of probing for the absolute neutrino mass and its variation with short Gamma Ray Burst (GRB). We have calculated the flight time difference between a massive neutrino and a photon in two different approaches to mass v
TestingMassVaryingNeutrinoWithShortGammaRayBurst
InstituteofHighEnergyPhysics,ChineseAcademyofSciences,
P.O.Box918-4,Beijing100049,P.R.Chinaand
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DepartmentofAstronomy,NanjingUniversity,Nanjing210093,P.R.China
Inthispaperwestudythepossibilityofprobingfortheabsoluteneutrinomassa