Compositional and geochemical characteristics of light hydrocarbons for typical marine oils and typical coal-generated oils in China

Different types of crude oils have different light hydrocarbon compositional and geochemical characteristics. Based on the light hydrocarbon data from two kinds of oils, i.e., coal-generated oils and marine oils in China, light hydrocarbons in marine oils in the Tazhong area are generally relatively enriched in n-heptane, and coal-generated oils from the Turpan Basin are enriched in methylcyclohexane. The K1 values, reported by Mango （1987）, range from 0.97 to 1.19 in marine oils, basically consistent with what was reported by Mango on light hydrocarbons in terms of the majority of the crude oil data. But the K1 values of coal-generated oils are particularly high （1.35-1.66） and far greater than those of marine oils; heptane values in marine oils, ranging from 32.3% to 45.4%, and isoheptane values, ranging from 1.9 to 3.7, are respectively higher than those of coal-generated oils, indicating that the oils are in the high-maturity stage. In addition, expulsion temperatures of coal-generated oils from the Turpan Basin are obviously lower than those of marine oils from the Tazhong area.     

利用NOAA卫星资料估算陆地沙尘量的方法

提出一种利用NOAA卫星可见光通道估算北方干旱陆地上空沙尘含量的方法。该方法考虑到在短时间内某一固定区域的地面反射率变化较小,因此可以利用沙尘暴发生和晴空2个不同时刻卫星测量到的这一像素区的辐射值来消除地面反射率的影响,估算陆地上空沙尘暴的光学厚度。在2002年4月6日左右沙尘暴发生期间,利用该方法计算的沙尘光学厚度与载沙量的结果和同步观测的TSP值与地面气象数据在趋势与分布上是一致的。     

地理国情数据集成管理研究与实现

简要阐述了湖南省地理国情数据的内容与特点;针对数据集成管理、统计分析和应用服务的需要,从设计思想、系统架构、系统功能等方面对地理国情数据库管理与应用服务系统进行了分析和设计;结合湖南省工作实践,构建了省级地理国情空间数据库,开发了地理国情数据库管理与应用服务系统,可为类似数据集成管理平台建设提供参考和借鉴.     

矿山遥感监测数据发布和核查方法研究

针对矿山遥感动态监测工作中的监测数据下发不及时和数据核查质量差等问题提出了一种矿山遥感动态监测数据服务发布和核查方法:利用天地图在线服务体系将监测影像和图斑数据按照规范进行发布和注册,形成完整的“服务发布、服务注册、用户发现、服务共享”机制;设计使用智能终端外业核查、上报矿山遥感解译图斑信息.该方法应用于山东省基岩地区露天开采矿山遥感动态监测工作中.     

一种基于占有率反馈的虚拟网络映射算法

网络虚拟化技术通过对物理资源的抽象,可以有效解决现有互联网架构中存在的网络结构僵化、可扩展性差等问题.虚拟网络映射问题是指将用户发送的所有虚网请求映射到底层物理网络中,同时还要满足虚网请求中对各个资源的限制要求（如节点计算能力、链路带宽等）.从节点负载平衡的角度出发,在基于就近原则的虚网映射算法基础上,引入节点负载平衡的反馈机制,引导各个虚网请求更均匀地映射到底层物理网络中.另外,在k短路径算法机制中引入了当前链路资源占有率作为评价参考标准,这样可以尽可能均匀地分散链路压力.同时,在检验链路资源是否满足虚网请求的过程中,由于优先选中的链路资源占有率低,所以算法映射成功率高,映射耗时更短,虚拟网络映射效率得到了有效提高.     

Optimization of simulation and visualization analysis of dam-failure flood disaster for diverse computing systems

Simulation and subsequent visualization in a network environment are important to glean insights into spatiotemporal processes. As computing systems become increasingly diverse in hardware architectures, operating systems, screen sizes, human–computer interactions and network capabilities, effective simulation and visualization must become adaptive to a wide range of diverse devices. This paper focuses on the optimization of simulation and visualization analysis of the dam-failure flood spatiotemporal process for diverse computing systems. First, an adaptive browser/server architecture of the dam-failure simulation application was designed to fill the hardware performance and visualization context gap that exists within diverse computing systems. Second, a data flow and an optimization method for multilevel time-series flood data were given to provide more support to network simulation, visualization and analysis on diversified terminals. Finally, a user interaction friendly and plugin-free prototype system was developed. The experiment results demonstrate that the methods addressed in this paper can cope with the challenge in simulation, visualization and interaction of a dam-failure simulation application on diversified terminals.     

The mass-balance characteristics and sensitivities to climate variables of Laohugou Glacier No. 12, western Qilian Mountains, China

Due to global warming, glaciers on the Tibetan Plateau(TP) are experiencing widespread shrinkage; however, the mechanisms controlling glacier variations across the TP are still rather unclear, especially on the northeastern TP. In this study, a physically based, distributed surface-energy and mass-balance model was used to simulate glacier mass balance forced by meteorological data. The model was applied to Laohugou No. 12 Glacier, western Qilian Mountains, China, during2010~2012. The simulated albedo and mass balance were validated and calibrated by in situ measurements. The simulated annual glacier-wide mass balances were-385 mm water equivalent(w.e.) in 2010/2011 and-232 mm w.e. in 2011/2012,respectively. The mean equilibrium-line altitude(ELA) was 5,015 m a.s.l., during 2010~2012, which ascended by 215 m compared to that in the 1970 s. The mean accumulation area ratio(AAR) was 39% during the two years. Climatic-sensitivity experiments indicated that the change of glacier mass balance resulting from a 1.5 °C increase in air temperature could be offset by a 30% increase in annual precipitation. The glacier mass balance varied linearly with precipitation, at a rate of130 mm w.e. per 10% change in total precipitation.     

P16INK4A联合HPV L1壳蛋白检测在宫颈鳞状上皮内病变诊断中的应用

目的 初步探讨P16^INK4A联合HPV L1壳蛋白检测在宫颈鳞状上皮内病变诊断中的应用价值。方法 选择在温州市人民医院就诊患者,收集69例宫颈鳞状上皮内病变标本,行P16^INK4A、HPV L1壳蛋白检测,分析P16^INK4A、HPV L1壳蛋白及P16^INK4A联合HPV L1壳蛋白在各级宫颈病变中的表达差异。结果 P16^INK4A在LSIL组、HSIL组、SCC组中的阳性率分别为45.5%、85.2%、100.0%。同LSIL组比较,P16^INK4A在HSIL组及SCC组阳性率明显升高（P<0.01）。HPV L1壳蛋白在LSIL组、HSIL组、SCC组中的阳性率分别为63.6%、18.5%、0%,HPV L1壳蛋白在LSIL组中阳性率明显低于HSIL组及SCC组（P<0.01）。随着宫颈病变加重,P16+/L1-阳性率有升高趋势（P<0.01）,P16-/L1+阳性率有下降趋势（P<0.01）。LSIL组中P16+/L1-阳性率明显低于HSIL组和SCC组（P<0.01）,SCC组P16+/L1-阳性率较HSIL组有明显提高（P<0.05）。LSIL组中P16-/L1+阳性率明显低于HSIL组和SCC组（P<0.01）。P16+/L1-较P16^INK4、HPV L1壳蛋白单一检测筛查HSIL+特异性明显升高（P<0.01）。结论 P16^INK4A联合HPV L1壳蛋白有望成为诊断宫颈鳞状上皮内病变的有效指标。     

小生境遗传算法求解多峰问题在反演中应用

基于反演问题的不确定性和目标函数的多峰性，引入改进的小生境遗传算法，求解出目标函数的若干个局部峰（或全局峰），然后利用先验知识，判定得到满意解，并利用褶积模型进行层速度反演，通过理论速度与反演速度的比较，验证了进行多峰优化的有效性。     

地磁加卸载响应比方法应用初探

以新疆地磁观测资料为基础，采用加卸载响应比方法进行回顾性研究发现，若响应比值P（Z）≥4.1，则在喀什周边地区有可能与1－11个月以后的地震有较好的对应。响应比值一般在震前1－11个月出现最大异常，个别地震在震前几天或发震同日出现；并且高响应比值对应的地震震级相对较高。乌鲁木齐的地磁响应比值异常并不意味着一定有中强地震对应，它主要反映了构造应力的变化。