长岛妈祖文化嬗变的文化人类学解读

阐述长岛作为妈祖文化北向传播的中转站及我国北方妈祖文化中心,妈祖文化曾在该地区盛极一时。历史上,它随着我国海运的发展,由妈祖文化的发源地福建沿海地区传播而来,历经宋、元、明、清四个朝代,逐渐嬗变,成为该地区民众的重要精神信仰,对于族际交流与社区凝聚力的形成,起到过重要作用。如今它则成为了推动长岛旅游业继续向前发展的重要文化资本。     

Variation of satellite transponder delay

For precise orbit determination of geosynchronous earth orbit(GEO)satellites using transfer ranging observations,it is generally assumed that the variation of the satellite transponder delay is very small and that it can be solved as a constant parameter together with satellite orbit parameters.However,this assumption is too general and it reduces the accuracy of orbit determination for GEO satellites.To study and analyse the impact of the satellite transponder delay on GEO satellites orbit determination,two schemes were proposed.First,the satellite transponder delay was eliminated by forming single-difference observations between two ground stations;second,the satellite transponder delay was described as a constant parameter.The preliminary results demonstrate a difference of about1–2 m between the two schemes when used for precise orbit determination of GEO satellites.By fixing the GEO satellite orbit and other relevant parameters estimated by single-difference model,we inversed the instantaneous transponder delay from non-difference observation.It was found that the satellite transponder delay has a distinct diurnal variation,with an amplitude of 3–4 m.The findings of this paper are helpful in establishing an accurate model of satellite transponder delay and in improving the accuracy of GEO satellites orbit determinations and predictions.     

基于ArcGIS Engine和.NET的海水环境数据分析评价系统的设计与实现

以AreGIS Engine技术为核心,.NET为开发平台,集成SQLServer、WinForm和一键导出word等技术,设计了北海区海水环境监测数据分析评价系统,实现监测数据导入与标准化处理、监测数据预警、数据库管理、查询与统计、海水质量评价和一键式产品制作等功能。实际应用表明,系统运行良好。利用代码实现Spatial Analyst Tools中的分析功能,可显著提高业务人员的办公效率和业务质量,为其他海洋环境监测与评价系统的研发提供了示范,并为海洋管理部门实时掌握海洋监测数据信息、快速诊断海洋环境质量状况提供了技术保障。     

销钉用于HPF加固混凝土构件的界面黏结性能

为了对HPF加固混凝土构件界面黏结性能进行研究,通过外包HPF加固混凝土试件的双面剪切试验,研究了修补界面所植入抗剪切销钉对界面黏结性能的影响.试验结果表明,植入销钉能够有效提高界面的黏结性能,提高试件抗剪承载力.销钉因素对界面黏结性能的灰关联分析表明,钢筋的级别对界面黏结性能的影响最大,其次是植入销钉的数量,再次是销钉的直径大小.     

基于非线性最小二乘算法的超宽带TOA估计

研究室内密集多径信道环境下的超宽带到达时间(TOA)估计技术.提出一种改进的门限比较TOA估计算法,利用非线性最小二乘算法同时估计多径延时和幅度,采用迭代算法提高参数估计精度,根据判决门限比较结果终止多径搜索过程并估计出TOA.分析该算法在室内多径信道模型中的性能,给出门限的设置方案.仿真结果表明,在不同的信噪比下设置合理的判决门限后,该算法具有较高的估计精度,能够满足精确定位需求.     

基于遥感技术的测风雷达

研究风廓线雷达的探测威力和我国对流层大气湍流常数(C2n)随季节的变化规律.结合目前对流层风廓线雷达的研制经验以及我国北方地区的试验数据进行分析与探讨,介绍了风廓线雷达的组成原理,推导了风廓线雷达方程和最大探测距离估算公式.各地区C2n的变化是造成目前风廓线雷达探测距离估算误差的主要原因,试验数据表明,我国北方地区对流层-C2n(均值)随季节的起伏小于边界层-C2n随季节的起伏幅度.此外,信号处理损耗也是风廓线雷达威力估算时一个不可忽视的因素.     

Paleoclimate change recorded in the red earth and brown-yellow sediment of Late Quaternary for northeastern part of Guangdong Province, south to the Nanling Mountains, China

The paleoenvironment indicated by the geochronology, major oxides SiO2, Al2O3 and TOFE （Fe2O3 ＋ FeO）, and CIA （Chemical Index of Alteration） value of the red earth and brown-yellow silt primarily characterized by the Linjiang stratigraphic section, based on the geological investigation of Late Quaternary along the river banks of northeastern part of China＇s Guangdong Province, south to the Nanling Mountains, allow us to hypothesize that the red earth on the first terrace in northeastern part of Guangdong belongs to reticulated red clay developed in a hot-wet environment of the last interglacial period （132-73 ka BP）, similar to the monsoon environment in the northern margin of modern tropical zone, while the overlying brown-yellow silt layer mainly accumulated in a monsoon environment of warm temperate zone in the last glacial period （73-11 ka BP）, with the aeolian sand LJ3 representing an extreme period of worsening climate. Such a hypothesis corresponds well with predecessors＇ research on the paleoenvironment indicated by abundant fossils in both south and east to the Nanling Mountains. Hence, it follows that the bioclimatic zone did experience a large and rapid vicissitude in northeastern part of China＇s Guangdong Province, and even in the full extent of the region south to the Nanling Mountains from the last interglacial period to the last glacial period, with the red earth being replaced by the brown-yellow silty sediment, and even maybe with the Ailuropoda-Stegodon Fauna being replaced by the Penghu Fauna. This study may provide an important geological demonstration for the environmental response to global change in China＇s low latitudes on a 10 ka scale.     

企业虚拟营销战略探讨

随着经济全球化时代的到来,网络技术的日趋完善,企业的营销环境呈现出了新的特点,新的市场营销形态——虚拟营销已经悄然出现。文章研究了虚拟营销的特点,分析了其在当今经济环境中竞争优势和运作规律,提出了我国出口企业要取得强有力的竞争力应采取的措施。     

TIMP-4 mRNA在小鼠子宫中的表达和激素调节

为研究TIMP-4 mRNA在子宫中的变化规律,采用半定量RT-PCR方法,观察了TIMP-4 mRNA在出生后小鼠子宫不同发育期、动情周期、妊娠早期以及假孕早期子宫中的表达和激素调节。结果发现,TIMP-4 mRNA在出生后不同发育期的小鼠子宫中、动情周期的任何时期、妊娠第1天以及假孕第1天的子宫中都不表达,但在妊娠和假孕第2天、第3天、第4天的子宫中都表达。以上结果提示,TIMP-4 mRNA在妊娠小鼠子宫中的表达可能不依赖存活胚胎的激活,而可能受母体妊娠分泌物的上调。     

Optimal carrier-smoothed-code algorithm for dual-frequency GPS data

Carrier-smoothed-code (CSC) algorithm is an effective pseudorange multipath mitigation technique, which can alleviate the computational burden and reduce the communication bandwidth needed for the transmission of GPS observations. This paper presents an improved Hatch filter and address the optimal CSC algorithm for dual-frequency GPS data based on the optimal parameter estimation theory. The smoothed observations have the same information content as that of the raw dual-frequency GPS data from which they are derived. Consequently, the optimal CSC algorithm is equivalent to the uncombined algorithm. Theoretical analyses show that the data precision of the optimal CSC algorithm is better than that of Hatch filter and its improved version.