射电类星体黑洞质量和射电特性的研究

收集了117个类星体(20个射电宁静类星体和97个射电噪类星体)的红移、热光度、H_β发射线宽度、5 100 A的单色光度、射电噪度.利用反响映射法计算了样本的黑洞质量和爱丁顿比,利用总的5 GHz流量密度计算出射电光度.分析了它们之间的相关性,得到的结论如下:(1)射电宁静类星体的黑洞质量和热光度、射电噪度、射电光度之间具有弱相关性,而射电噪类星体黑洞质量和热光度、射电噪度、射电光度之间具有强相关性;(2)射电宁静类星体热光度和射电光度、5 100 A的单色光度之间具有弱的相关性,而射电噪类星体热光度和射电光度、5 100 A的单色光度之间具有强的相关性;(3)射电宁静和射电噪类星体的黑洞质量、发射线宽度和爱丁顿比分布有差异.基于这些结果得到:射电宁静和射电噪类星体发射线宽度的差异可能是导致它们黑洞质量不同的原因;射电宁静和射电噪类星体本质的不同是由于内秉物理性质的不同造成的;黑洞质量、黑洞自旋、爱丁顿比和寄主星系形态是解释射电噪度起源和双峰状分布的重要参量;射电喷流和盘的吸积率之间具有紧密的关系.     

The unification of RBLs with XBLs

Many astronomers have discussed the property of BL Lacertae objects, including the variation of spectrum, the correlation of multi-wave bands and the property of polarization, which could give good information for studying intrinsic correlation of components and position of BL Lacertae objects. In the paper, we investigated the properties of RBLs and XBLs and RBLs/XBLs (these objects can also be found by radio survey as by X-ray survey). Firstly, we collected the light curve of 28 BL Lacertae objects, and gained their short timescales by Structure Function (SF). Secondly, we analyzed the distribution of the short timescales of some BL Lacertae objects, including 28 objects’ timescales calculated by SF, as well as the distribution of the redshift and the black hole mass and the flux densities of the multi-wavebands (radio, near-infrared, optical and Gamma-ray). Based on statistical analysis, the result of the paper support the unification model of RBLs and XBLs.     

Comparison of monthly rainfall generated from dynamical and statistical downscaling methods: a case study of the Heihe River Basin in China

Theoretical and Applied Climatology - Monthly rainfall in the Heihe River Basin (HRB) was simulated by the dynamical downscaling model (DDM) and statistical downscaling model (SDM). The...     

基于Internet的GPS数据自动处理系统的研究

利用Internet技术、数据库技术和Bernese 5.0研究出一套基于Internet的GPS数据自动处理系统,即Auto-Bernese。论述该系统的开发目标、配置环境、系统结构,并在最后给出一处理实例。     

关于悬沙级配沿垂线分布的有效悬浮指标

讨论了要流悬沙中某级泥沙所占全体悬沙之Ｐｉ的两种定义,根据Ｈ．Ｒｏｕｓｅ含沙量分布公式,导出了相应的Ｐｉ／Ｐａ、Ｐｉ／Ｐｉｐｊ、Ｐｉ／ＰｉｐｊＱ等３种形式的悬沙级配沿垂线相对分布表达式;表达了有效悬浮δｉ的物理函义及其实际应用取值问题。     

考虑桩顶冠梁效应的水泥土挡墙变形计算方法

以ｍ法为基础,建立了考虑桩顶冠梁效应的挡墙变形计算模型,给出了计算公式。工程实例表明：该方法预测挡墙变形是可行的。     

基于GIS分析法识别城区水安全敏感区研究

近年来,随着海绵城市建设的推进,我国学者对于城市雨洪管理方面的研究日益加深。然而海绵城市的建设相关问题也日益凸显,首要问题就是对于城区大范围积水分析、水安全分析等技术相对薄弱,使得大范围海绵城市的建设流于形式。以宜良县建成区为例,查阅相关文献并对积水点实际调研。借助ArcGIS工具的强大功能对城区的各项指标进行综合分析,得出宜良县建成区水安全敏感区分布图,从而使得海绵城市建设可以根据各区域水安全敏感情况制定不同策略,对今后海绵城市的建设具有借鉴意义。     

降雨对呼和浩特地震台形变观测的影响

为了研究降雨对定点形变观测的影响,在了解呼和浩特地震台形变观测环境后,分析了伸缩仪、水管倾斜仪和垂直摆倾斜仪的观测数据质量,统计了降雨量和各仪器分量的变化,并进行了相关分析,得到不同形变仪器测项数据变化幅度对降雨量的响应函数,结果显示两者间呈较好的线性相关。     

Dynamic mechanisms controlling the topography of Longmenshan area

The Longmenshan fault, which defines the eastern edge of the Tibetan Plateau, is one of the steepest margins of the plateau with a sharp elevation drop of about 4 km over a distance less than 100 km across the Longmenshan fault. The mechanism which is responsible for controlling and maintaining the elevation difference is highly debated. Using multiple observations including seismic velocity model, Moho depth, effective elastic thickness of the lithosphere, we conducted a quantitative study for elucidating the contributions from crust and lithospheric mantle by an integrated analysis of lithospheric isostasy and flexure. It is shown that the topography of the Longmenshan fault is supported by both lithospheric isostasy and flexure statically, and lower crustal channel flow and mantle convection dynamically. Different mechanisms have different weights for contribution to the topography of the Songpan-Ganzi block and the Sichuan Basin. The static and dynamic support contribute roughly the same to the topographic difference of ~4 km between the two sides of the Longmenshan fault. The static topographic difference of ~2 km is mainly resulted from the lithospheric isostasy, while the dynamic one of ~2 km is contributed by the uprising of the accumulated material in the lower crust beneath the Songpan-Ganzi block and the downward drag force caused by the upper mantle convection under the Sichuan Basin. It is thus suggested that the lower crustal flow and upper mantle convection are dynamic forces which should be taken into account in the studies on the dynamics in the Longmenshan and surrounding regions.     

基于2D地图的城市户外ARGIS视觉辅助地理配准技术

针对当前便携式位姿传感器获取的户外6DOF绝对位姿精度通常不足,致使基于位姿传感器的户外AR地理配准精度不高,提出了一种以2D地图作为参考数据进行户外视觉辅助定位进而提高ARGIS系统地理配准精度的方法和技术框架。在位姿传感器获取初始位姿的基础上,详细阐述了基于2D地图进行图像位姿优化和辅助校正的基本原理;并通过试验验证了该方法可以对位姿传感器获取的初始位姿进行优化,进而提高户外AR地理配准精度的有效性。