LINES OF DIVISION,LINES OF CONNECTION: STEWARDSHIP IN THE WORLD OCEAN

ABSTRACT. This article investigates the history of drawing lines across ocean space. Although drawing lines generally is perceived as an act of division—as exemplified by the line drawn through the Atlantic Ocean by Pope Alexander VI in 1493—lines, like the ocean itself, often signify connection or other, more complex social relationships. In an attempt to break through commonly held perspectives on line drawing in marine governance, I suggest that key events (and lines) of modern marine history are characterized by a common norm of stewardship. I conclude by considering the flexibility of stewardship and by alerting the reader to alternate norms that could be used to generate ocean-governance systems.     

武山铜矿北矿带ICu矿体砷的分布规律

武山铜矿化矿带ＩＣｕ矿体是高砷矿体,分析了砷在各金属矿物中含量及分配情况和含砷量的分布规律,确定了高砷采场或矿段,指出了进行矿石质量控制,配矿管理的降砷途径。     

现代中国人起源的实证──颅骨特征的时空变化

本文用数学方法系统地检测了从早期智人到现代人时期中国人颅骨测量性特征的时空变化规律。结果显示,从早期智人到晚期智人的演化过程出现逆向变化、不连续;同时,长江以北的和长江以南的颅骨特征时态变化趋势也呈现显著差异。这两种现象的存在,揭示了现代北方的和南方的中国人可能由各自地区的早期智人演化而来。     

非线性时间序列分析的最新进展及其在地球科学中的应用前景

评述了非线性时间序列分析的最新进展,包括相空间重构、序列性质的鉴别、建模与预报,同时介绍了非线性时间序列分析在地球科学中的应用概况。     

基于标准化残差的相关观测抗差估计模型

根据观测误差与解差函数的关系,建立了山标准化残差构造的相关观测抗差估计模型。     

Nighttime convection in the interior of a dense Douglas fir forest

Infrared radiative surface temperatures as observed over a dense Douglas fir forest during stable atmospheric conditions are analyzed. It is shown that the concept of a single surface temperature to describe both the thermal coupling and the radiative coupling between atmosphere and forest fails when longwave cooling is large and wind speeds are low. In such cases a decoupling of the radiative surface temperature from the air temperature aloft is observed. Conditions for decoupling are formulated in terms of an appropriate Richardson number. It is shown that a convective surface temperature comes into play that is coupled to the forest interior air temperature. Observed radiative surface temperature is then composed of this convective surface temperature and the aerodynamic surface temperature. Forest interior air temperature during nighttime is, in general, lower than air temperature above the canopy. A simple two-layer canopy model is used to explain this phenomenon in terms of the distribution of atmospheric sensible heat flux and storage heat flux over the two canopy layers.     

GPS网与常规网三维联合平差的一种简便模型

提出了GPS控制网与常规控制网三维联合平差时分别固定平面坐标与高程的简便方法,从而简化了三维联合平差的模型,并给出算例验证了模型。     

用标贯击数确定抗液化振动挤密砂桩的间距

在考虑了抗液化振动挤密砂桩的侧向和竖向加密的同时,又考虑了砂桩的充盈系数对加固作用的影响,从而提出了一种基于抗震规范的液化判别方法,根据标准贯入击数确定抗液化振动挤密砂桩间距的经验关系。     

基于尺度空间的分层聚类方法及其在遥感影像分类中的应用

基于尺度空间的分层聚类方法（ＳＳＨＣ）是一种以热力学非线性动力机制为理论基础的新型聚类算法,是视觉松驰化过程的模拟。与传统基于统计方法的聚类算法相比较,ＳＳＨＣ具有样本空间可服从自由分布、通过规则可获取最优聚类中心点及类别、可在聚类过程中融合后验知识等优点。本文从聚类和热力学运动机制和视觉模拟过程出发,对ＳＳＨＣ聚类算法进行综合分析,并对如何生成聚类树的过程进行详细描述邮通过融合点的部分自由能进行     

相空间相似预报的一种新方法

本文针对相空间相似预报方法应用过程中存在需要同时确定时滞和维数的困难,引入历史预报准确率最高原则,提出了一种相空间相似预报的新方法。应用昆明站近百年（1901年～1992年）逐月雨量和气温时间序列对该方法进行了检验。计算结果表明此方法是可行的。