GNSS导航卫星多维粗差定位算法研究

针对现有GNSS导航卫星多维粗差定位算法研究较少,本文提出采用全局-局部测试法查找观测值中的粗差。从函数模型方面详细论述全局测试和局部测试判断并定位粗差的过程,并且结合蒙特卡罗方法模拟的导航实验数据验证本文所提出的方法。模拟实验表明,该方法能比较快速且准确地定位含粗差观测值,从理论上补充了GNSS导航卫星多粗差定位的算法,也在一定程度上提高了多星座导航完备性。     

江苏高邮、宝应交界4.9级地震的震害分析

Based on the network monitoring data and field investigations, the basic characteristics of the Ms4. 9 earthquake at the juncture of Gaoyou and Baoying in Jiangsu Province on July 20, 2012 have been introduced, and the focal mechanism solutions have also been obtained. According to the regional tectonic features and site macroscopic survey, the occurrence of the earthquake was probably related to the Yangchacang-Sangshutou fault. Based on site survey data, both the evaluation criterion of seismic intensity of this region and the seismic intensity maps have been proposed. According to the damage characteristics of brick-concrete structure and brick-wood structure, the main reasons of serious damage for buildings are poor foundation conditions, low seismic bearing capacity, poor quality of construction and disrepair. Considering the differences of earthquake damage in the different regions, advice on accelerating the new rural construction, improving the resistance against earthquake disasters of rural residential areas and strengthening the seismogenic research on strong and moderate size earthquake is proposed, which will be possibly helpful for earthquake damage survey, prediction and prevention.     

基于地形图测绘方法的比较与分析

本文比较分析了现阶段地形图测绘的主要方法,论述了针对不同地形图测绘项目,科学合理选用相应的测绘方法顺利完成测绘任务,具有非常重要的经济价值和社会意义。     

我国天文视宁度Fried参数r0的计算与统计分析

在塔塔尔斯基理论模式下，使用全国81个探空气象站1986—1995年10年探空资料计算了各测站不同高度上的Pried参数r0，统计结果表明，r0年平均值存在明显的地理分布，高值中心在3000m高度上是夏河合作、丽江和上海；在1500m高度上为民勤和贵阳，在900m高度上为汉中；在测站海拔高度上为定日，r0的月平均值的地理分布存在显著的季节变化，这种变化与东亚副热带急流季节性变化相吻合．     

论地勘企业产品结构调整

党的十二届三中全会以来,随着地勘单位“一业为主,多种经营”方针的实施,许多地勘单位兴办了以产品或服务直接面向市场的企业,或是地勘业的延伸产业,或是当时市场前景看好,进入门槛较低的产业。二十多年来,地勘单位的多种经营企业为地勘单位承接了转产职工,增加了对外收入,增强     

黄狼沟铜矿区的地质特征与找矿标志

通过对矿体围岩、围岩蚀变、矿物成份、伴生组份的研究,从地质特征入手,详细研究了地层、构造、岩浆岩对矿体的规模、形态、赋存位置及矿石质量的影响因素,找到了主要的找矿标志,为下步找矿提供了方向.     

煤田构造演化新解—从成煤盆地到赋煤构造单元

中国成煤盆地类型多样、后期改造强烈,绝大多数成煤盆地已遭受破坏解体,煤系现今分布范围与原型盆地相去甚远。针对中国煤田构造的上述特点,以成煤盆地研究为基础,建立了成煤盆地原型综合分类方案,划分了我国主要成煤期的成煤盆地类型。采用赋煤构造单元的概念表征现今煤系赋存特点,认为煤田构造格局的形成和演化就是成煤盆地原型经历不同程度改造,形成现今各类赋煤单元的过程。晚古生代以来,中国大陆经历了海西、印支、燕山和喜马拉雅四大构造旋回,多期性质、方向、强度不同的构造运动,使各成煤期形成的不同类型的成煤盆地遭受不同程度的改造,原型盆地分解破坏、叠合反转,煤系发生变形、变位、变质作用,形成不同级别和不同构造属性的赋煤构造单元,由此决定了煤炭资源的现今赋存状态。      

织锦巴菲蛤(Paphia textile)过氧化氢酶基因cDNA全长克隆、序列同源分析与组织表达

Catalase is an important antioxidant protein that can protect organisms against various forms of oxidative damage by eliminating hydrogen peroxide. In this study, the catalase c DNA of Paphia textile(Pt CAT) was cloned using RTPCR and rapid amplification of c DNA ends(RACE). Pt CAT is 1 921 bp long and consists of a 5′-UTR of 50 bp, a 3′-UTR of 349 bp, and an ORF of 1 542 bp that encodes 513 amino acids with a molecular weight of 58.4 k D and an estimated isoelectric point of 8.2. Sequence alignment indicated that Pt CAT contained a highly conserved catalytic signature motif(~(61)FNRERIPERVVHAKGAG~(77)), a proximal heme-ligand signature sequence(~(352)RLFSYSDP~(359)), and three catalytic amino acid residues(H~(72), N~(145), and Y~(356)). Pt CAT also contains two putative N-glycosylation sites(~(34)NKT~(36) and ~(437)NFT~(439)) and a peroxisome-targeting signal(~(511)AQL~(513)). Furthermore, Pt CAT shares 53%–88% identity and 29%–89% similarity with other catalase amino acid sequences. Pt CAT m RNA was present in all tested organs, including the heart, digestive gland, adductor muscle, gonad, gill, and mantle, but its expression was highest in the digestive gland. High-temperature-induced stress produced two expression patterns of Pt CAT m RNA: first, an initial up-regulation followed by a down-regulation in the heart, digestive gland, and gonad and, second, consistent down-regulation in all other organs. These results demonstrate that Pt CAT is a typical member of the catalase family and might be involved in the responses to harmful environmental factors.     

SPATIO-TEMPORAL CHARACTERISTICS OF NO2 IN PRD URBAN GROUP AND THE ANTHROPOGENIC INFLUENCES ANALYSIS BASED ON OMI REMOTE SENSING DATA

Spatio-temporal distribution characteristics and variation trends of tropospheric NO_2 in Pearl River Delta(PRD) urban group and its adjacent areas were analyze from 2005 to 2013 based on remote sensing data from ozone monitoring instrument(OMI) satellite, and further explored the impact of human activities on NO_2. Compared with the ground observation data, the OMI NO_2 remote sensing data displayed high reliability. Due to active industrial production, high car ownership, great energy and power consumption, the average tropospheric NO_2concentration(7.4×1015molec/cm2) of PRD region is about 3 times of the adjacent areas. At the same time, the regional high pollution NO_2 in PRD region as a whole, the urban group effect is remarkable. Sinusoidal model can well fit the periodic variation of the NO_2 in PRD and adjacent areas. NO_2 concentration was highest in winter while lowest in summer. The concentration of NO_2 in PRD region is decreasing in recent 9 years, which has a significantly negative correlation with the second industry output and car ownership. This suggests that the nitrogen oxide emissions governance in PRD region had achieved initial results. The concentration of NO_2 increased significantly in the eastern and northern Guangdong Province, there are good positive correlations with the second industrial outputs and car ownerships, it is thus clear that industrial emissions and automobile exhausts are important sources of NO_2 in these regions. The concentration of NO_2 in western Guangdong area is stable.