对地质遗迹类自然保护区法律保护问题的研究

地质遗迹是不可再生的地质自然遗产,它对人类有着极其重要的意义。阐述了建立地质遗迹类自然保护区的重要意义以及目前地质遗迹类自然保护区发展中存在的立法不足;提出了相关的立法建议。     

六种蔬菜对土壤中微量元素富集性的比较研究

研究蔬菜对土壤中微量元素富集性的规律有助于指导海南蔬菜的种植。以建立的该测定方法对6种蔬菜以及土壤中6种微量元素的含量进行比较研究,结果表明:同一蔬菜样品对不同元素生物吸收系数不同,说明富集性不同;不同蔬菜样品对同一元素的生物吸收系数不同,说明富集性不同。     

Hierarchical clustering of spatially correlated functional data

Classification problems of functional data arise naturally in many applications. Several approaches have been considered for solving the problem of finding groups based on functional data. In this paper, we are interested in detecting groups when the functional data are spatially correlated. Our methodology allows to find spatially homogeneous groups of sites when the observations at each sampling location consist of samples of random functions. In univariable and multivariable geostatistics, various methods of incorporating spatial information into the clustering analysis have been considered. Here, we extend these methods to the functional context to fulfil the task of clustering spatially correlated curves. In our approach, we initially use basis functions to smooth the observed data, and then, we weight the dissimilarity matrix among curves by either the trace‐variogram or the multivariable variogram calculated with the coefficients of the basis functions. This paper contains a simulation study as well as the analysis of a real data set corresponding to average daily temperatures measured at 35 Canadian weather stations.     

中微量元素肥料的生产与应用研究进展

本文阐述了中微量元素肥料在农业生产中所发挥的重要作用,分析了我国中微量元素的现状及发展前景,概述了中微量元素生产的原料来源及工艺技术,对发展我国中微量元素的生产和应用提出了合理建议。     

Estimation of the trace of the scaled covariance matrix of a multivariate t-model using a known information

The trace of the scaled covariance matrix of the multivariate t-distribution is considered for estimation using a power transformation. The proposed estimator always dominates the usual maximum likelihood estimator in the sense of having smaller risk under a quadratic loss function. The dominance behaviour is proved analytically as well as computationally by using Monte-Carlo simulation.     

On a class of loans with a systematic amortisation schedule

Abstract

In this paper we show that a single set of formulas will characterise a wide range of standard loans. This makes it possible to describe these loans in a compact manner and facilitates the design of computer programs calculating their characteristics. The characterisation includes the entire amortisation schedule before and after tax and the duration and convexity measures.     

浅谈风险导向审计在跟踪审计中的运用

工程跟踪审计这一新生的方法在工程项目控制中收到了很好的效果,但是也大大的增加了审计成本。这一切又引出了一个新的问题,到底跟踪审计的经济性如何?所有的工程项目都要进行跟踪审计吗?本文试在跟踪审计中运用风险导向审计,使人们能够在今后的工程项目中,从经济的角度权衡跟踪审计!     

关于Bellman不等式的一个注记Ⅱ

对Bellman不等式的一种新的推广形式进行探讨，在文献[1]的基础上继续得到了另一个重要不等式，并进一步利用该不等式得到了关于矩阵特征值的一个不等式形式。     

CCD动态测量的接口技术

文章给出了CCD在动态数据采集过程中实时跟踪信号的变化来调整采集速度和信号增益的方法.     

寸关尺脉象的物理溯源

根据流体力学原理，分析了中医脉象的形成机制，并利用反射波与压力波的叠加，率先解释了脏腑病变与寸、关、尺脉象的对应关系。