关于一个矩阵不等式的推广

文章在文献[1]的基础上研究了矩阵不等式,利用矩阵Lyapunov方程改进了矩阵二次型的LaSalle不等式,同时给出了相关的一个矩阵方程的通解和几个常用的推论．     

四元数矩阵谱半径的估计

给出了四元数矩阵谱半径的概念,定义了四元数矩阵的范数,并在谱半径概念的基础上,讨论了谱半径的估计,得到一系列重要结果.     

Approximate merging of multiple Bézier segments

This paper deals with the approximate merging problem of multiple adjacent Bézier curves with different degrees by a single Bézier curve, which is a frequently seen problem in modeling. The unified matrix representation for precise merging is presented and the approximate merging curve is further derived based on matrix operation. Continuity at the endpoints of curves is also discussed in the merging process. Examples show that the method in this paper achieves satisfying merging results.     

CNKI中关于计算机等级考试研究的文献统计分析

以中国知识资源总库（CNKI）为数据来源,对2010—2014年我国计算机等级考试的相关研究文献进行了统计分析,力求较为客观地反映近5年我国计算机等级考试研究的现状,从中发现其特点及存在的问题,为今后相关的研究提供参考。     

矩阵变换器输出谐波和共模电压分析

针对矩阵变换器共模电压产生的机理及其抑制原则,分析了共模电压瞬时值的大小,波形及其谐波频谱,得出了矩阵变换器共模电压的本质特征,并对SPWM控制策略不同开关状态下的共模电压进行了理论分析及仿真.     

关于代数与数论的一些结果

在本文中我们用模型论方法证明了关于代数与数论的一些结果.     

New non-invasive photo-identification technique for free-ranging giant anteaters (Myrmecophaga tridactyla) facilitates urgently needed field studies

ABSTRACT

Pelage patterns, colouration and other biometric traits are perceived to be uniform in the Neotropical giant anteater (Myrmecophaga tridactyla), a conception precluding the identification of individuals, which is essential for field research on the little known aspects of the species’ ecology and behaviour.

Here we present a new, non-invasive technique of matrix photo-identification to identify individual giant anteaters by their natural markings. In a long-term field study in the Brazilian Pantanal, photographs of 475 giant anteater observations (396 = direct sightings, 79 = camera traps) were captured from 2010 to 2015 and considered for our analysis. Photographs were stored in a catalogue and coded in a computerised identification table, with biometric traits being categorised and described for each observed individual in a matrix. In 71% of all photographed giant anteaters, differences in pelage marking patterns, as well as other characteristics such as ear shape and scars, allowed individual recognition. We ensured consistency of the method by conducting a double-blind verification by an experienced researcher and naïve volunteers.

This simple, non-invasive method can push the level of information about life history and population structure of giant anteaters, as it applies to a large array of study designs. It can thus enhance future studies, be integrated in ongoing research projects or supply additional information out of older data sets. It is applicable to expand data collection and raise awareness in local communities, and potentially for participatory citizen science methods. Altogether these are important cornerstones for conservation actions on the species which is listed as ‘Vulnerable’ on the International Union for Conservation of Nature Red List of Threatened Species.     

矩阵张量积数值半径的一个不等式和一个等式（英文）

借助矩阵张量积和矩阵数值半径的性质,证明了不等式r（A1×…×Ak）≥∏ i=1 r（Ai）和等式r（A×B）=r（B×A）,其中A1,…,Ak,A,B∈L（U）.同时,举例说明了不等式r（k×A）≤rk（A）不成立.而当A1,…,Ak为正规阵时,有r（A1×…×Ak）=∏ i=1^ k r（As）.     

不完全判断矩阵权值的粒子群优化算法计算

不完全判断矩阵权值求解是一个重要问题。在分析不完全判断矩阵权值求解的各种方法基础上，提出以使判断矩阵的最大特征值达到最小为目标，建立求解权值准则。给出利用粒子群优化算法解决此问题，实例表明该方法比较有效。     

一种多接口视频矩阵的系统集成方案及其实现

随着视频监控应用的日益广泛,新技术和新产品不断涌现.然而,视频监控系统的建设由来已久,各个时期的产品也将继续在各自岗位上长期发挥着重要的作用.如何充分整合现有视频监控资源和局域网络资源成为人们关注的问题,文章针对不同接口的视频矩阵提出一种系统集成方案,并给出了具体的实现.