热注入法制备Ni3S4纳米棒及其电化学性能

针对采用涂敷法制备电极材料时,运行一段时间后会出现电极的比容量性能下降较快的问题,利用热注入的方法,合成电化学性能优异、尺寸约为100 nm的Ni3 S4纳米棒.研究表明:制备小尺寸的纳米材料作为超级电容器的电极材料,有利于反应过程中电解液的快速渗透,能够进一步提高其电化学性能;制备的Ni3 S4纳米棒正极材料可以在0...     

Control of vehicle platoons for highway safety and efficient utility: Consensus with communications and vehicle dynamics

Platoon formation of highway vehicles is a critical foundation for autonomous or semiautonomous vehicle control for enhanced safety,improved highway utility,increased fuel economy,and reduced emission toward intelligent transportation systems.Platoon control encounters great challenges from vehicle control,communications,team coordination,and uncertainties.This paper introduces a new method for coordinated control of platoons by using integrated network consensus decisions and vehicle control.To achieve suitable coordination of the team vehicles based on terrain and environmental conditions,the emerging technology of network consensus control is modified to a weighted and constrained consensus-seeking framework.Algorithms are introduced and their convergence properties are established.The methodology employs neighborhood information through on-board sensors and V2 V or V2 I communications,but achieves global coordination of the entire platoon.The ability of the methods in terms of robustness,disturbance rejection,noise attenuation,and cyber-physical interaction is analyzed and demonstrated with simulated case studies.     

从高考数学谈高等数学与初等数学结合教学的必要性

高考是高等院校选拔人才的重要手段,其考试大纲和要求对中学教育起着引导作用,同时也对高等教育具有一定的启示作用。通过2018年四川高考数学一道题的解法和考生作答情况,对数学教育的现状和存在的问题进行分析,从而提出高等数学与初等数学结合的必要性和重要性。     

Social Innovation Action Research for Lifestyle Improvement of Child Labour in Tehran (Social Innovation’s Idea on Child Labour Lifestyle)

Systemic Practice and Action Research - Child labour has become an ever growing social problem in developing countries like Iran. This study presents a strategy for solving this problem regarding...     

Correction to: Social Innovation Action Research for Lifestyle Improvement of Child Labour in Tehran (Social Innovation’s Idea on Child Labour Lifestyle)

Systemic Practice and Action Research - A Correction to this paper has been published: https://doi.org/10.1007/s11213-021-09566-9