GPS掩星技术低轨卫星计划的现状及进展

主要介绍了几个国际上已经实施的GPS掩星计划（GPS／MET，Φrsted,Sunsat,SAC-C,CHAMP)和在研的（COSMIC，ACE）低轨卫星计划的现状及取得的进展。通过总结可知，下一代GPS掩星接收器应具有体积小、质量轻（几百克）、低功耗的特点；能提供实时的卫星物理状态参数；飞行器上的自主计算和控制；星上数据通信和命令解释；所有跟踪数据应符合厘米级精密定轨的要求；能提供掩星和海洋反射实验的测量。     

Modeling impacts of vegetation in western China on the summer climate of northwestern China

Using the monthly NCEP-NCAR reanalysis dataset, the monthly temperature and precipitation at surface stations of China, and the MM5 model, we examine impacts of vegetation cover changes in western China on the interdecadal variability of the summer climate over northwestern China during the past 30 years. It is found that the summer atmospheric circulation, surface air temperature, and rainfall in the 1990s were different from those in the 1970s over northwestern China, with generally more rainfall and higher temperatures in the 1990s. Associated with these changes, an anomalous wave train appears in the lower troposphere at the midlatitudes of East Asia and the low-pressure system to the north of the Tibetan Plateau is weaker. Meanwhile, the South Asian high in the upper troposphere is also located more eastward. Numerical experiments show that change of vegetation cover in western China generally forces anomalous circulations and temperatures and rainfall over these regions. This consistency between the observations and simulations implies that the interdecadal variability of the summer climate over northwestern China between the 1990s and 1970s may result from a change of vegetation cover over western China.     

地分割证在房地产交易中的应用

当前，各地房地产市场活跃，房地产交易日益频繁，房地产价格一路攀升，在房地产交易中，当你用攒了半辈子的钱买了一套新房却长期拿不到土地使用证的时候，当你想进行房地产交易却因“两证”不全暗自焦急的时候，当你为办理各种房产证明不得不四处奔波的时候，就会想有没有一种措施能做到便民、省心呢？     

基于GIS技术的三江平原热量资源评价

基于GIS技术,使用黑龙江省气象观测站和农垦、森工系统观测站的气温资料,以及数字高程模型(DEM)资料,运用趋势面分析法和线性内插法得到三江平原栅格化的热量资源数据。分析表明,三江平原纬度和高度因子对各项热量指标分布均有影响,经度因子主要影响年平均气温、4月平均气温、7月平均气温、≥0℃积温和≥10℃积温;佳木斯西部、双鸭山西部、鸡西大部热量资源较丰富,而青黑山、完达山、老爷岭和太平岭等地区热量资源相对较差。分析结果为合理开发利用三江平原热量资源提供了依据。     

Evaluating CEOP model performance with the observational data from Tongyu reference site, semi-arid region of China

Using data archived in the Coordinated Enhanced Observing Period (CEOP) project, comparisons between field observations undertaken at Tongyu CEOP reference site in China and model output from year 2003 to 2004 have been implemented, and in particular, the time series and diurnal cycles of precipitation, near-surface temperature, air temperature, and latent and sensible heat fluxes are presented. The results show that the ability of the model simulations on the temperatures, such as air temperature and the surface temperature, is satisfactory compared with the simulations on the land surface heat fluxes and the precipitation at Tongyu site. In addition, the multi-model ensemble exhibits better results over all items in comparison with the observations. The differences of the precipitation at the interannual and the seasonal time scales between the model results and observations indicate that some of the models are able to reproduce the larger amount of precipitation in 2003 than that in 2004, which is consistent with the trend of the observations at Tongyu site even though the mean square errors of models output calculated from daily precipitation during year 2003 and 2004 are even greater than the daily amount of the precipitation. The poor skill in the quantitative simulation of the precipitation indicates that the deficiency of the models in simulating the surface heat fluxes may be closely related to the biases of the precipitation simulations. In terms of the seasonal time series of the precipitation, there is an increase during summer, accompanied by the same increased trend of the latent heat flux and the decreased trend of the sensible heat flux from the insitu observations.     

辽东隆昌地区辽河群划分及其构造样式演变

从岩石组合、沉积序列、接触关系及变形变质方面分析辽东隆昌地区的辽河群是一套在沉积上连续的,并且经历了相同变形变质历史的中浅变质沉积岩系。详细的构造分析表明它经历了三期构造变形,第一期为北北西向平褶皱,第二期为北北四向斜歪褶皱,第三期为北东东向宽缓直立褶皱。     

Inversion of two-dimensional tidal open boundary conditions of M<Subscript>2</Subscript> constituent in the Bohai and Yellow Seas

Two-dimensional tidal open boundary conditions of the M2 constituent in the Bohai and Yellow Seas(BYS) have been estimated by assimilating T/P altimeter data.During inversion,independent point(IP) strategy was used,in which several IPs on the open boundary is assumed,values at these IPs can be optimized with an adjoint method,and those at other grid points are determined by linearly interpolating the values at IPs.The reasonability and feasibility of the model are tested by ideal twin experiments.In the practical experiment(PE) after assimilation,the cost function may reach 1% or less of its initial value.Mean absolute errors in amplitude and phase can be less than 5 cm and 5°,respectively,and the obtained co-chart can show the character of the M2 constituent in the BYS.The results of the PE indicate that using only two IPs on the open boundary can yield better simulated results.     

原子吸收法测定矿石中的锂铷铯

本文研究了锂、铷、铯三元素在丙酮有机溶剂中的行为,测定条件,干扰离子的影响及消除,使灵敏度分别比在水相中提高为2.5—3.5倍。方法灵敏度高,干扰少,测定范围为0～5PPM,适用于矿石中微量锂、铷、铯三元素同时测定。     

沧县隆起中段献县凸起和阜城凹陷岩溶型地热资源特征

为探究华北平原的岩溶热储分布规律,以及如何高效开发利用献县凸起和阜城凹陷地热田的地热资源,结合前人研究成果与已有地热井的测井、地震、水化学等资料,分析了岩溶热储分布规律以及献县凸起和阜城凹陷地热田的四大要素即"源、储、通、盖"等地热地质条件,建立了地热田概念模型,并精细评价了地热资源量.研究表明地热田是形成于渤海湾盆地...     

南堡凹陷南部沙一段控砂模式

南堡凹陷盆地内部构造特征复杂,砂体时空分布差异较大。为了明确砂体分布规律,首先对南部缓坡带构造-沉积背景进行研究和岩心相观察,识别了沙一段辫状河三角洲前缘砂体;进而通过对南部缓坡带层序地层格架的建立、沉积学研究和地震地质解释,发现沙一段砂体同时受到顺源和逆源两种同沉积断裂坡折带类型控制。其中,顺源坡折带控制了断槽物源通道的走向,逆源坡折带改变了水流的流向,阻止了砂体的运移。据此,建立了南堡凹陷南部缓坡带沙一段同沉积断裂的控砂模式,得出沙一段砂体具有"沙垒田凸起供砂,断槽物源通道输砂,逆源坡折带阻砂和同沉积洼槽带聚砂"的发育特点。