商丘近40 a蒸发量变化特征及原因分析

利用商丘1961-2000年小型蒸发皿蒸发量资料,分析了商丘蒸发量的变化趋势及引起蒸发量变化的因子,结果表明,商丘年、季和月蒸发量均存在明显的下降趋势,影响蒸发量变化的因子主要有风速、日照、相对湿度、水汽压等.     

铝片还原-硫酸铁铵容量法测定钛铁矿中高含量

试样经碱熔,盐酸提取的钛,在以盐酸、硫酸、磷酸组成的强酸性溶液体系中,利用铝片的强还原性,还原四价钛为三价钛。再用三价铁氧化三价钛为四价钛,过量的三价铁离子与硫氢酸根离子生成血红色络合物,根据此原理测定高含量钛。实验证明,溶液在此强酸性体系中,隔绝空气和控制时间的条件下,其含量范围在0.13%～100%内,测定结果准确度高。     

The effect of the wave-induced mixing on the upper ocean temperature in a climate model

The significant underestimation of sea surface temperature （SST） and the temperature in the upper ocean is one of common problems in present climate models. The influence of the wave-induced mixing on SST and the temperature in the upper ocean was examined based on a global climate model. The results from the model coupled with wave-induced mixing showed a significant improvement in the simulation of SST and the temperature in the upper ocean compared with those of the original model without wave effects. Although there has still a cold bias, the new simulation is much closer to the climatology, especially in the northern ocean and tropical ocean. This study indicates that some important physical processes in the accurate simulation of the ocean may be ignored in present climate models, and the wave-induced mixing is one of those factors. Thus, the wave-induced mixing （ or the effect of surface waves） should be incorporated properly into climate models in order to simulate or forecast the ocean, then climate system, more accurately.     

Surface current field and seasonal variability in the Kuroshio and adjacent regions derived from satellite-tracked drifter data

The muhiyear averaged surface current field and seasonal variability in the Kuroshio and adjacent regions are studied. The data used are trajectories and （1/4） ° latitude by （1/4） ° longitude mean currents derived from 323 Argos drifters deployed by Chinese institutions and world ocean circulation experiment from 1979 to 2003. The results show that the Kuroshio surface path adapts well to the western boundary topography and exhibits six great turnings. The branching occurs frequently near anticyclonic turnings rather than near cyclonic ones. In the Luzon Strait, the surface water intrusion into the South China Sea occurs only in fall and winter. The Kuroshio surface path east of Taiwan, China appears nearly as straight lines in summer, fall, and winter, when anticyclonic eddies coexist on its right side; while the path may cyclonically turning in spring when no eddy exists. The Kuroshio intrusion northeast of Taiwan often occurs in fall and winter, but not in summer. The running direction, width and velocity of the middle segment of the Kuroshio surface currents in the East China Sea vary seasonally. The northward intrusion of the Kuroshio surface water southwest of Kyushu occurs in spring and fall, but not in summer. The northmost position of the Kuroshio surface path southwest of Kyushu occurs in fall, but never goes beyond 31 °N. The northward surface current east of the Ryukyu Islands exists only along Okinawa-Amami Islands from spring to fall. In particular, it appears as an arm of an anti- cyclonic eddy in fall.     

三种数学模型在海洋经济预测中的应用

根据可得的海洋经济统计数据,采用三种数学模型对2007年至2010年中国主要海洋产业的产值进行了预测,通过对历史数据拟合的比较,认为ARIMA模型拟合度较差,三次指数平滑法的拟合精度居中,灰色系统拟合误差最小。     

Repacking practice for G-3 engineering driller power unit with drive shaft of dual channel reverse circulation

In order to satisfy operating requirements for constant core drilling technology in reverse circulation with hollow-through DTH,the power unit of G-3 engineering driller was ameliorated. The new one with dual channel drive shaft, achieved the perfect assemble with transmission structure of the original power unit. It could interconvert according to need by using two sets of drive shafts with direct and reverse circulation. The repacked G-3 engineering driller carried on experiment in the field test in Luanchuan molybdenum mine of Henan, whose effect was very good.     

海南近海野生鞍带石斑鱼群体遗传多样性的RAPD分析

用RAPD技术分析海南近海野生鞍带石斑鱼群体的遗传多样性,从48个随机引物中筛选出20个引物对鞍带石斑鱼的DNA进行扩增,结果共检测出131个位点,其多态位点比例(P)为48.09%;利用RAPDdistance1.04软件获得海南野生鞍带石斑鱼群体21个个体间的遗传距离矩阵,依此计算出个体间平均遗传距离(D)为0.2650,个体间平均遗传相似系数(S)为0.7350;利用POPGENE1.3软件计算出Shannon遗传多样性指数(H0)为0.2266;与其他种类的石斑鱼群体的RAPD分析结果比较可知,海南近海野生鞍带石斑鱼群体仍保持着较丰富的遗传多样性.因此在海南发展鞍带石斑鱼的养殖业,可以选择海南近海的野生鞍带石斑鱼作为亲本进行人工繁殖,但应采取一些有效的保护措施,以避免遗传多样性的丧失.     

长江和黄河入海沉积物不同粒级中长石/石英比值及化学风化程度评价

长石/石英(F/Q)比值是评估碎屑沉积物化学风化强度的传统指标.在长江大通站和黄河利津站及相应河口区各取9个沉积物样品,将其<125 μm的部分按1间隔分离成7组不同的粒级,用X-ray衍射法半定量分析测定了全样和不同粒级沉积物中石英和长石的相对含量,计算了长石/石英(F/Q)、钾长石/石英(Fk/Q)、斜长石/石英(Fp/Q)比值,据此评估了长江和黄河入海沉积物化学风化强度随粒级的变化.结果显示取自黄河样品的F/Q,Fk/Q和Fp/Q比值在总体上显著高于长江样品,与长江流域的化学风化强度高于黄河的结论一致,可以作为流域沉积物化学风化强度替代指标.长江样品的F/Q,Fk/Q和Fp/Q比值随粒级变细持续变低,黄河样品则呈波动式下降.黄河样品的F/Q高出长江样品的部分主要发生在＜32 μm的细粒级,在粗粒级区间差别很小,当沉积物粒级下降到一定区间后F/Q差异出现快速增加,显示长江流域沉积物的风化程度高于黄河主要发生在较细粒级.上述比值在黄河样品的2～4 μm粒级中高出长江样品3～5倍,是凸显两河化学风化强度差别的敏感粒级,也可以作为两河物源示踪的指标.     

《中国改革开放30年地图集》选题研究与创意设计

紧紧围绕"纪念改革开放30年"这一主题,对展示内容的设计和地图表现方法进行了深入的研究与实践,总结出一套行之有效的设计思想,可供类似工作参考.     

重力异常辅助惯性导航中匹配区提取方法

由于重力场中的重力异常数据是以格网的形式表示的,它与地形的DEM在数据结构上有一定的相似性.因此可借鉴一些数字地形分析的方法,提取重力场的特征区域(匹配区)用于辅助惯性导航.首先,对重力场进行特征提取,通过对特征的比较分析选取其中的某些因子作为重力场特征因子;然后,利用等值线方法对重力场特征数据进行区域分割,提取栅格特征数据区域的矢量边缘,并对这些矢量表示的区域进行聚类处理;最后,利用凸壳算法提取这些区域的凸壳范围线,获得重力异常变化比较显著的区域(匹配区).从而为重力匹配辅助导航提供了必要的参考数据.