自然论解的理性时间与空间以及理性计数     

侯广坤  周端宁 《中山大学学报论丛》1996,(6)

建立满足统一结构且相互关联自然论解的理性时间概念和理性空间概念；并描述来自于基本运动的“变”与“不变”群体相互作用的计数制和时、空坐标系．  相似文献   

固定资产会计信息失真的表现形式     

陈德修  余华茂 《赣南师范学院学报》2003,(4):89-90

固定资产会计信息失真是当前会计打假的重要方面之一。由于固定资产会计信息失真的表现形式较为隐蔽,对社会经济造成重大危害,本文就固定资产增加、折旧、减值、修理、减少的会计信息失真表现形式进行了阐述。  相似文献   

Verbal counting skill predicts later math performance and difficulties in middle school     

《Contemporary educational psychology》2019

This study examined the role of verbal counting skill as an early predictor of math performance and difficulties (at or below −1.5 standard deviation in basic math skills) in middle school. The role of fourth-grade level arithmetical skills (i.e., calculation fluency, multi-digit arithmetic i.e. procedural calculation, and word problem solving) as mediators was also investigated. The participants included 207 children in central Finland who were studied from kindergarten to the seventh grade. Path modeling showed that verbal counting in kindergarten is a strong predictor for basic math performance in seventh grade, explaining even 52% of the variance in these skills after controlling for the mothers’ education levels. This association between early verbal counting skill and basic math performance was partly mediated through fourth-grade procedural calculation and word problem solving skills. Furthermore, verbal counting had an unique predictive relation to middle school math performance above and beyond the basic arithmetical and problem solving skills in fourth grade. Poor kindergarten verbal counting skill was a significant indicator for later difficulties in mathematics.  相似文献   

Exploring all-author tripartite citation networks: A case study of gene editing     

Feifei Wang  Chenran Jia  Xiaohan Wang  Junwan Liu  Shuo Xu  Yang Liu  Chenyuyan Yang 《Journal of Informetrics》2019,13(3):856-873

Constructing academic networks to explore intellectual structure realize academic community detection, which can promote scientific research innovation and discipline progress, constitutes an important research topic. In this study, tripartite citation is fused with co-citation and coupling relations as a way of weighting the strength of direct citations, and all-author tripartite citation networks were constructed due to the contributions of all authors to the resulting publications. For purpose of exploring the potential of the all-author exclusive and inclusive tripartite citation networks, gene editing is taken as a case study. The extensive experimental comparisons are conducted with the traditional author single-citation networks and first-author tripartite citation network in terms of network structure characteristics, identifying core scholars, and exploring intellectual structures. The following conclusions can be drawn as follows: our all-author tripartite citation networks are able to help identify the most influential scholars in the field of gene editing, and the intellectual structures from exclusive tripartite citation networks are optimal.  相似文献   

Publication counting methods for a national research evaluation exercise     

Przemyslaw Korytkowski  Emanuel Kulczycki 《Journal of Informetrics》2019,13(3):804-816

In this paper, we investigate the effects of using four methods of publication counting (complete, whole, fractional, square root fractional) and limiting the number of publications (at researcher and institution levels) on the results of a national research evaluation exercise across fields using Polish data. We use bibliographic information on 0.58 million publications from the 2013–2016 period. Our analysis reveals that the largest effects are in those fields within which a variety publication and cooperation patterns can be observed (e.g. in Physical sciences or History and archeology). We argue that selecting the publication counting method for national evaluation purposes needs to take into account the current situation in the given country in terms of the excellence of research outcomes, level of internal, external and international collaboration, and publication patterns in the various fields of sciences. Our findings show that the social sciences and humanities are not significantly influenced by the different publication counting methods and limiting the number of publications included in the evaluation, as publication patterns in these fields are quite different from those observed in the so-called hard sciences. When discussing the goals of any national research evaluation system, we should be aware that the ways of achieving these goals are closely related to the publication counting method, which can serve as incentives for certain publication practices.  相似文献   

如何实现光电式数粒机的准确计数     

曹健 《南通职业大学学报》2006,20(2):70-72

分析了光电传感器的有效检测区域和PLC的输入/输出响应速度对光电式数粒机数粒精度的影响,并给出相应的解决办法,以保证数粒机能够高速准确地计数。  相似文献   

不定积分计算中几类常见错误成因分析及对策   总被引：2，自引：0，他引：2  

唐小丹 《贵州教育学院学报》2004,15(2):4-5

归纳不定积分中几类常见错误，并分析成因提出对策。  相似文献   

激动人心的英雄史诗——数系扩张的历史回顾     

郭龙先 《昭通师范高等专科学校学报》2006,28(5):16-22

数系扩张这一漫长而曲折的历程中，既蕴含着无数的经验教训，又凝结着人类的大智大勇．在筚路蓝缕的求索中，数学的王国虽曾笼罩过理性的迷雾，但人类思想的智慧之光终将照彻寰宇．回顾数学史上这伟大的乐章，能够从这震撼人心的旋律中获得不断前进的勇气、智慧和力量．  相似文献   

Analysis of Acoustic Emission Signal by Fractal Theory in Aluminum Alloy Spot Welding     

罗震 董安单平  邢志东 《天津大学学报(英文版)》2007,13(3):186-190

Spot welding was widely applied inindustries such asaviation, automobile , and other production departments .Aluminumstructures gradually take a prominent positionowingto lightweight and high intensity. But in quality in-spectionof aluminumalloys ,a single electrical parameter orthermal parameters[1]cannot effectivelyforecast the diame-ter of the weld nugget ,the intensity of spot weld, andsplashing duetotheinstabilityof weldzone caused byalloycompositions and fragile surface oxidation. Theref…  相似文献   

2-5岁超常儿童的计数及其策略研究     

徐浙宁  方俊明 《中国特殊教育》2006,(8):66-72

本研究选取2-5岁超常儿童46名、普通儿童54名,通过实验考察了早期超常儿童的计数及其策略。结果显示:(1)超常儿童更早掌握“一一对应”的计数原则;(2)4岁前,超常儿童相对同龄普通儿童能掌握更大范围的基数;特别是3-4岁超常儿童,基本已经掌握了20以内的基数概念,显著优于同年龄普通儿童;(3)2-5岁超常儿童普遍具有比同年龄普通儿童更好的计数策略;(4)4-5岁超常儿童相对同龄普通儿童和3-4岁超常儿童,能够更有效地运用计数策略完成“随机性”计数任务。  相似文献