Is TOL 1326-379 a Prototype of γ-Ray Emitting FR0 Radio Galaxy?

With the possible spacial association to the Fermi/LAT source 3FGL J 1330.0-3818,TOL 1326-379 may be the first one that is identified as a γ-ray emitting Fanaro...     

Uniform head in horizontal and vertical wells

The steady-state head within a fully penetrating well may be estimated by evaluating the Thiem equation at the radius of the well. A method is presented here to extend results from the Thiem equation to horizontal wells and to partially penetrating wells. The particular model used in this investigation is based upon the analytic element method; it accurately reproduces a boundary condition of uniform head along the cylindrical surface at the perforated face of the well. This model is exercised over a representative range of parameters including the well's length, radius, and pumping rate, and the aquifer's hydraulic conductivity and thickness. Results are presented in a set of figures and tables that compare the well's drawdown to the drawdown that would have been obtained using the Thiem solution with the same pumping rate and radius. A methodology is presented to estimate the head within a horizontal or partially penetrating well by adding a correction term to results that can be readily obtained from computer models of vertical fully penetrating wells. This approach may also be used to contrast the differences in head between horizontal and vertical wells of various lengths, radii, and placement elevations.     

基于球面六边形网格系统的空间信息处理方法

利用球面离散网格系统管理全球海量空间信息是一种受到普遍关注的新途径.文中提出的方法首先采用施奈德等积多面体投影将平面多分辨率六边形网格映射到球面构成网格系统;然后通过边界点四元组将球面六边形网格之间的空间关系转化为球面三角四叉树处理,利用扩展的QTM编码方案在3轴离散网格坐标系下实现了经纬度和单元地址码之间的转换;最后提出了单元分析和检索算法.实验结果表明,这种数据处理方法直接对单元地址编码进行操作,具有较高的效率.     

Fluid evolution in the Rushan lode gold deposit of Jiaodong Peninsula, eastern China

The Rushan gold deposit in the Jiaodong Peninsula is currently the largest lode gold in China. Gold occurs mainly in pyrite- and polymetallic sulfide–quartz vein/veinlet stockworks. Fluid inclusions in the deposit are divided into three main types, namely CO₂–H₂O, H₂O–CO₂ ± CH₄ and aqueous ones. Microthermometric data show that the pre-gold fluids were CO₂-dominant (X_CO2 up to 0.53), and the total homogenization temperatures fall in the range of 298377 °C. These fluids, modified by fluid/wallrock reactions, gradually evolved into fluids with less CO₂ (X_CO2 = 0.010.19) in the main ore-forming stage, and the total homogenization temperatures range from 170 to 324 °C. Hydrogen and oxygen stable isotope data suggest that ore-forming fluids were mixture of magmatic and meteoritic origin. Co-occurrence of gold and sulfides implies that gold was most likely transported in the form of gold–sulfide complexes. The wide distribution of CO₂ inclusions means that the pH variation during gold transportation was controlled by CO₂ buffering.     

An evaluation of potential solar radio emission power threat on GPS and GLONASS performance

The L-band solar radio emission has recently been regarded as a potential threat to stable GPS and GLONASS performance. However, the threat has not been completely investigated or assessed so far. We evaluate in detail the occurrence of GPS/GLONASS signal tracking failures under the direct exposure of wideband solar radio emission. By means of theoretical analysis, we found that the solar radio emission power level of 1,000?sfu (solar flux units) or higher can cause GPS/GLONASS signal tracking failures especially at L2 frequency. In order to prove this evaluation, we investigated GPS/GLONASS signal tracking failures at L1 and L2 frequencies during power solar flares X6.5 (December 6, 2006) and X3.4 (December 13, 2006). Comparing these events with weaker solar flare X17.2 on October 28, 2003, we found that L2 signal tracking failures appeared when the solar radio emission power exceeds 1,000?sfu. Therefore, our theoretical and experimental results confirm the earlier results by other authors.     

大别山地区黄山松和油松树轮宽度的气候意义

本文基于2010年采自大别山地区黄山松、油松树轮资料分别建立了树轮宽度标准年表,利用相关函数检验了年表与附近的麻城气象站1959-2009年月平均最高气温、月平均气温、月平均最低气温和月降水量之间关系,旨在探讨黄山松、油松树轮宽度的气候意义。研究结果显示,平均敏感度、标准差、信噪比等统计量黄山松年表均高于油松年表,表明黄山松年表较油松年表包含更多的气候信息,具有更高的树轮气候学研究价值。黄山松径向生长主要受当年2-7月平均气温限制,任何月份及月份组合降水量对黄山松径向生长的限制作用均不显著;油松径向生长主要受当年5-6月降水总量限制,任何月份及月份组合气温对油松径向生长的限制作用均不显著。研究表明,在中国亚热带暖湿地区,气候要素的年际变化亦可对部分树种径向生长具有较强的限制作用,树木年轮宽度的变化对气候具有指示意义。研究结果将进一步弥补中国亚热带暖湿地区树轮宽度年表的不足,为树轮气候重建研究提供参考和依据。     

中国沿海大都市出口加工区生命周期研究——以上海金桥出口加工区为例

以产品生命周期理论和企业生命周期理论等为基础,对上海市金桥出口加工区生命周期演化进行了分析。出口加工区生命周期的分析应结合不同时期产品结构和企业结构的表现特征,根据产品结构和企业结构的演变特征,金桥出口加工区的生命周期历经了加工导向期、制造导向期和创新导向期3个时期。金桥出口加工区生命周期演化的本质是产品的更新换代和企业动态的集聚与消亡过程,是两大类因素共同作用的结果:生产成本上升、投资门槛增高等内部投资环境产生的推力因素;国际直接投资向高科技化和服务化转变、中西部出口加工区竞争力增强、本地开发区的产业联动等外部投资环境产生的拉力因素。反映出金桥出口加工区生命周期是投资主导型的演化过程。     

人工影响天气后下游地面湿度响应分析探讨

2008年8月8日下午到夜间,针对北京地区西北部、西部和西南部强对流天气进行了人工影响天气作业。为了解大规模进行人工影响天气作业后下游地区地面湿度的变化情况,文章结合空中天气形势,利用北京城区和郊区215个自动站及非自动站资料进行降水分布研究,重点利用其有湿度记录的108个站资料,对大规模人工影响后的地面湿度变化结合同期降水资料进行分析,以期为今后大规模的人工影响天气提供实验依据。结果表明,2008年8月8日夜间北京地区引导气流为西南东北向,天气系统基本沿西南—东北向移动,18：00—00：00的6小时累计降水量,呈东北西南向带状分布,北京城区处在降水量比较少的＂豁口＂处,＂鸟巢＂无降水。人工影响天气部门在北京地区西南部进行大规人工模影响强对流天气作业。作业后,在大规模人工影响作业区下风方带状范围内,地面水汽压随时间具有明显的突变（地面水汽压突然减小,持续时间大致在25分钟左右）,且这种突变从由西南向东北减弱,突变开始的时间逐渐推后。在带状中心轴线附近这种突变比较明显,远离中心轴线这种突变减弱,开始突变的时间也推后;而在带状范围外,则没有这种现象。究其原因,主要由于大规模发射火箭弹进行作业,一是火箭弹尾喷的播撒作用,二是尾喷激起的强大扰动作用,有利于大的雨滴降落,或迅速长大后降落,形成下沉气流,下沉气流将高层的干冷空气带到低层引起地面水汽压减小;此下沉气流沿着引导气流向下游传播,在传播过程中逐渐衰减。进一步分析2008年8月8日20时500 hPa风,根据此高度风速大小估算大规模作业区距离分析地面水汽压发生较大变化测站的时间,发现测站地面水汽压的发生较大变化时间与由上游空气柱移来的时间比较一致。     

黄河流域冬、夏季水汽输送及收支特征

利用NCEP/NCAR再分析资料和我国实测雨量资料,对黄河流域1月和7月多年平均及旱、涝年整层积分的水汽通量、辐合(辐散)及各分区水汽收支进行了研究。结果表明,1月黄河流域无明显的水汽输送,而7月水汽沿西南、东南及西北3条路径输送,前两支气流在多年平均时主要影响黄河下游区。涝年时影响到黄河中、下游区,而上游区水汽流入较小;旱年,黄河中、上游区均无明显的水汽输送,只有下游的小范围地区受西南气流影响。各区净水汽通量分别与其地面降水的时空演变相对应,而经向净水汽通量是影响水汽收支变化及供给流域降水的主要水汽来源;涝年的水汽净收支与各边界水汽流入明显大于旱年。1月,西边界和北边界微弱的水汽输入远小于东边界和南边界的输出,各区均为水汽净辐散,不利于降水;7月,大量的水汽主要来自西边界和南边界,涝年各区均为水汽盈余,多年平均也以净辐合为主,而旱年则以水汽亏损为主。