析学术期刊页码的编排

页码是期刊的一个重要组成部分.目前学术期刊页码的编排形式多种多样.要高度重视和规范学术期刊页码的编排.在页码编排这一细节中要引入CIS中的VI(视觉识别),页码应是VI的一个重要组成.     

Four and twenty blackbirds: how transcoding ability mediates the relationship between visuospatial working memory and math in a language with inversion

Writing down spoken number words (transcoding) is an ability that is predictive of math performance and related to working memory ability. We analysed these relationships in a large sample of over 25,000 children, from kindergarten to the end of primary school, who solved transcoding items with a computer adaptive system. Furthermore, we investigated the nature of transcoding difficulty of over 300 two- and three-digit numbers. All data come from a Dutch sample, meaning that transcoding is complicated by decade-unit inversion: 24 is pronounced as ‘four-and-twenty’. Omission to invert the digits of a spoken number when writing it down is an inversion error: the incidence of these declined but did not disappear in later elementary school. Furthermore, transcoding ability mediated the relationship between visuospatial working memory and mathematics performance, a strong effect that declined with age. Inversion error making mediated this same relationship in an inverted U-shaped curve, peaking around grade 2 (8 years old). At the item level, structural characteristics related to inversion and irregular pronunciation of units and decades explained a large part of the variance in item difficulty. We conclude that number transcoding is an important ability to develop mathematical proficiency and discuss the implications of these findings.     

图的符号边控制的若干下界

设G=(V,E)是一个非空图,一个函数f:E→{-1,1},如果满足∑e’∈N[e]f(e’)≥1对于每一条边e∈E(G)均成立,则称f为图G的一个符号边控制函数。图G的符号边控制数记为r’s(G),定义为r’s(G)=min{∑e∈E(G)f(e)︱f}为G的一个符号边控制函数。全文对图的符号边控制函数进行了研究,得到了图的符号边控制数的若干新的下界。     

内部排序算法的性能分析与探讨

文章论述了算法的评价因素,通过设计随机乱序算法程序,针对各种长度的可排序表,采用不同的测试组数,测试了6种常用的内部排序算法的关键字比较次数和移动次数,从时间复杂度方面给出了6种排序算法的优劣.     

正则图同构判定的一个充要条件

给出了正则图同构判定的一个新充要条件,该条件对近似正则图同构判定也是有效的。     

基层公共图书馆如何做好地方文献工作

地方文献在一个地区经济发展中体现出越来越重要的作用，各基层公共图书馆在地方文献的发展、组织、整理上应采取一些措施和方法。     

基于大数因式分解的一种数字签名方案

本文利用大数因式分解的困难性提出不同于RSA公钥密码体制一种数字签名方案,并讨论了该方案的安全性。     

48 million configurations and counting: platform numbers and their capitalization

Platforms are important actors in contemporary cultural economic processes. They include social network sites, online content management systems, streaming media platforms, mobile communication infrastructures, supply chain logistics solutions, and cryptocurrencies. Analysis of platforms and their capitalization should take into account the ways they structure social practice as assets and the constitutive opacity of platforms as configured realities. It explores capitalization by focusing on the problems of counting people and things on platforms. Via a case study of the software repository platform [Github.com] (https://github.com), it analyzes how 'platform numbers’ participate in capitalization. It describes attempts to enumerate the elements of the platform by counting, mapping or listing them. The paper shows how attempts to enumerate people and things encounter forms of association, duplication, combination, imitation and configuration that are crucial to the ensemble but remain refractory to capitalization. It proposes configurative enumeration of the platform numbers as a way of conceptualizing these un-enacted excesses. In a configurative enumeration, the composition, the rhythms of imitation, variation and commutation, and constant relating, repairing and adjusting of configurations crucial to the ongoing formation of platforms come into view. Configurative enumerations engage the inventive realities of platformization, realities that precede and sometimes overflow their capitalization.     

在不同校区图书馆之间建立动态典藏机制的探讨

提出了在通借通还基础上建立一种动态典藏机制的思想。利用图书的自然流向,逐步使典藏结构趋于合理,实现典藏与读者需求的随动平衡。     

古典概型下样本空间的选取及其意义

在解答古典概率问题时,选取适当的样本空间,可以避免某些复杂的排列组合计算,使问题变得简单、直观．