A dinoflagellate <Emphasis Type="Italic">Cochlodinium geminatum</Emphasis> bloom in the Zhujiang (Pearl) River estuary in autumn 2009

A severe Cochlodinium geminatum red tide (>300 km2) was observed in the Zhujiang (Pearl) River estuary, South China Sea in autumn 2009. We evaluated the environmental conditions and phytoplankton community structure during the outbreak. The red tide water mass had significantly higher dissolved inorganic phosphate (DIP), ammonia, and temperature, but significantly lower nitrite, nitrate, dissolved inorganic nitrogen (DIN), and DIN/DIP relative to the non-red-tide zones. The phytoplankton assemblage was dominated by dinoflagellates and diatoms during the red tide. C. geminatum was the most abundant species, with a peak density of 4.13×107 cell/L, accounting for >65% of the total phytoplankton density. The DIN/DIP ratio was the most important predictor of species, accounting for 12.45% of the total variation in the phytoplankton community. Heavy phosphorus loading, low precipitation, and severe saline intrusion were likely responsible for the bloom of C. geminatum.     

偏序向量空间中集值映射的一类扩张定理

经典的Hahn-Banach扩张定理及其推广定理有着非常广泛的应用,但主要都是讨论单值映射的扩张性质。为了进一步讨论多值映射的扩张性质,通过构造的方法,利用了zorn引理及偏序向量空间的完备性,得到了当定义域空间是一个实向量空间,而值域空间是由锥引入序的Dedekind完备的偏序向量空间时集值映射的一类扩张性质,以及当给值域空间引入相应拓扑时连续集值映射的一类扩张性质。其结果进一步推广了Hahn-Banach扩张定理,扩大了其应用范围。     

基于MRPs无陀螺卫星姿态确定的抗差估计算法

针对精确航天器姿态问题,采用修正罗德里格参数(MRPs)表示姿态,用动力学方程进行角速率的传播,分别基于等价协方差和观测残差统计特性的协方差调整方法,实现UKF算法的抗差效果,并通过仿真验证该方法的有效性。仿真结果表明：在含有粗差的情况下,两种抗差UKF算法均能得到稳定的状态估计值,而第二种方法计算效率更高。     

复方新诺明在罗氏沼虾中的药代动力学和组织分布

研究了单剂量肌肉注射给药[甲氧苄氨嘧啶(SMZ)0 60 mg/kg]、口灌给药[磺胺甲基异噁唑(SMZ)100 mg/kg]和复方口灌给药(SMZ 100 mg/kg和TMP 20 mg/kg)三种给药方式下,SMZ和TMP在罗氏沼虾中的代谢动力学,分析了SMZ和TMP血淋巴、肌肉和肝胰腺中的分布特征。结果表明,SMZ以肌肉注射方式给药后的血淋巴中,药物经时浓度曲线符合二室开放房室模型,而SMZ&TMP口灌给药后却不能用房室模型拟合。肌注给药后,SMZ的消除半衰期(t1/2β)为24.92 h,单方和复方口灌给药后SMZ的消除半衰期(t1/2β)分别为40.70和47.197 h。复方口灌给药后TMP的消除半衰期(t1/2β)为28.77 h,TMP对SMZ的药代动力学并无显著影响。口灌给药后,SMZ和TMP在肝胰腺中的药物浓度高于同时间肌肉中的药物浓度,但肌肉和肝胰腺中的SMZ消除速度基本一致。     

硫氰酸盐光度法测定地质岩石矿物中的三氧化钨

试样经Na2O2熔融,在3～4mol/L的HCl介质中,以TiCl3为还原剂,将W 6还原为W 5,并与SCN-作用生成稳定的黄色络合物,借此进行光度测定,该络合物采用721分光光度计在430nm处测定,有最大吸收,此方法灵敏度高,重线性好,适用于地质样品中ω(WO3)/10-2=0.03～5.0的测定。     

基于植被状态指数的云南省农业干旱状况时空分析

本文首先计算了云南省2004-2013年农业干旱指数VCI,然后使用Pearson相关系数评价降水与VCI的相关性,基于VCI识别云南省2004-2013年农业干旱事件,最后,与SPEI气象干旱识别结果进行对比分析,在VCI农业干旱识别的基础上,使用干旱频率和干旱面积占比指标分析了云南省2004-2013年农业干旱时空特征。结果表明：降水只是影响VCI指数的关键因素之一;VCI和SPEI指数均能够较好对干旱进行监测并识别典型干旱,但两者的识别结果存在差异;云南省农业干旱频率在春冬两季较高,夏季较低,秋季介于夏季和春冬季之间;春夏冬三季农业干旱频率空间分布较为均匀,秋季农业干旱频率呈南低北高的分布态势,整体上北部干旱频率高于南部;2004-2013年云南省整体干旱面积占比呈现先减小后增加再波动的趋势,春冬两季整体干旱面积占比最高,分别为46.63%和47.18%,呈现下降趋势,夏季整体干旱面积占比最低,为43.81%,呈现上升趋势,秋季整体干旱面积占比介于冬春季和夏季之间,为45.74%,呈现下降趋势。总之,云南省农业干旱春冬易发性最高,影响范围最大,夏季易发性最低,影响范围最小。     

A new record of a flathead fish (Teleostei: Platycephalidae) from China based on morphological characters and DNA barcoding

A new record of Platycephalus sp.1 (sensu Nakabo, 2002) was documented based on morphological characters and DNA barcoding. We collected 174 specimens of the genus Platycephalus from Chinese coastal waters of Dongying, Qingdao, Zhoushan, and Beihai. Samples were identified as Platycephalus sp.1 morphologically. The coloration, meristic traits, and morphometric measurements are consistent with previously published records. In brief, it is an orange-brown flathead fish with dark brown spots scattered on head and body, lateral line scales 83 to 99 with one or two spine-bearing anteriormost pored scale, no yellow blotch on the caudal fin. Cytochrome oxidase I subunit (COI) gene fragments were sequenced for phylogenetic analysis. The mean evolutionary distance within the species Platycephalus sp.1 was 0.1%. Net evolutionary distances between Platycephalus sp.1 and other species of Platycephalus ranged from 10.8% to 19.7%, which is much greater than the threshold for species delimitation. The COI sequence analysis strongly supports the validity of Platyceohalus sp.1 at genetic level.     

Omni-directional distribution patterns of montane coniferous forest in the Helan Mountains of China

Slope aspect has significant effect on the development and distribution of montane forest,especially in arid and semiarid regions.This paper,using SPOT5 images and 1:50,000 DEM,digitally extracts and analyzes the spatial information of montane coniferous forest(mainly Qinghai spruce),and thereby explores how the upper and lower limits and the altitudinal range of coniferous forest vary and how the area of coniferous forest is related with annual insolation with all aspects in the Helan Mountains.The results show that: 1) In the eastern flank,the lower limit of coniferous forest is between 1,600 m and 2,000 m a.s.l.,and the upper limit between 2,800 m and 3,000 m a.s.l.;in the western flank,the lower limit of coniferous forest is between 2,000 m and 2,300 m a.s.l.,and the upper limit between 2,800 m and 3,100 m a.s.l.2) The altitudinal ranges of coniferous forest are 806~1,435 m,438~1,140 m for eastern flank and western flank,respectively.3) The area of coniferous forest takes on a normal distribution with aspect,and it has a close relationship with annual insolation.This distribution model developed in this paper quantitatively reveals the significant effect of slope aspect on the distribution of coniferous forest in arid and semi-arid land.     

差分InSAR处理及其应用分析

本文结合实例分析和介绍了影响In SAR处理结果的几个重要环节。如: 数据源及像对选择 ;影响In SAR处理的因素等。目前有4～5种雷达卫星数据可以用于In SAR的处理,ERS-1/2卫星数据效果最好; 差分In SAR处理的工作步骤中,亚像元精度的配准、相干性分析、全相位恢复等是其中的关键技术。In SAR的精度和噪声水平是In SAR能否实用的重要条件,噪声影响地物的相干性,噪声较大部位相干性消失,在整幅图像中噪声区域不大于30% ,将不影响整体的In SAR测量结果。     

中南4省(区)产铀层基本特征及其与铀成矿的关系

豫鄂湘桂4省(区)共有49个产(富)铀层组.主要有上震工统一下寒武纯、中泥盒统,下二叠统及上由叠统.其时空分布与地壳演化有关.受特定的构造捷回和大地构造单元控制.岩性为一定地质时期形成的海相碳硅泥岩建造和河流一滨湖三角洲相砂岩建造.富铀层往往是极重要的铀源层及良好的储铀层.产(富)铀层的岩性序列组合,岩石的化学和物理性质及构造一岩浆作用的叠加,严格控制着铀矿化的形成和富集.