The present research introduces a unique concept of scarf joint technique in friction stir welding(FSW)of aluminum alloy AA 6061-T6 plates and an investigation on weld quality.A new joint configuration with two distinct scarf angles(75° and 60°)was consid
A layered charge composed of the JH-2 explosive enveloped by a thick-walled cylindrical casing(active aluminum/rubber and inert lithium fluoride/rubber composites)was designed and explosion experi-ments were conducted in a 1.3 m3 tank and a 113 m3 bunker.
In this research,a promising class of insensitive and high-energy dense biopolymers,which contain nitrogen-rich 1H-tetrazol-1-yl acetate and nitrate ester functional groups,was successfully synthesized through tetrazole derivatization and nitration of cel
To improve the feature extraction of ship-radiated noise in a complex ocean environment,a novel feature extraction method for ship-radiated noise based on complete ensemble empirical mode decomposition with adaptive selective noise(CEEMDASN)and refined co
Multi-element array photoelectric detector is the core devices to form a photoelectric detection target with a large field of view.This photoelectric detection target brings about the problem of uneven detection sensitivity distribution in the detection s
A kind of phase change material(PCM)-based nanocomposite was prepared and added into high energy propellants containing RDX as additives to investigate its effect on thermal decomposition and burning characteristic of high energy propellants.The effect of
A moving target tracking control problem for marching tank based on adaptive robust feedback control scheme is addressed.A series of preparations is needed for tank gun before shooting a target,the pur-pose of this paper is to design a control system to f
在“互联网+”背景下,随着互联网技术的发展,企业经营方式多样化,运营模式也呈现出多样化的发展趋势.本文从公司的运营模式角度出发,探究文娱行业泛娱乐化的“互联网+”背景下,公司运营模式对企业风险承担水平的影响.作者从盈利来源、盈利点、盈利措施及利润屏障四个方面分别选取不同的评价指标来进行分析,从而得出文娱行业运营模式所具有的一般特征,然后,进一步探究这种运营模式对公司风险及风险承担水平的影响.研究发现:“互联网+”背景下,泛娱乐化的营运模式能增加财务风险,提高公司风险承担水平;并且营运模式的泛娱乐化程度越高
Focused energy delivery(FED)is a technique that can precisely bring energy to the specific region,which arouses wide attention in precision electronic warfare(PREW).This paper first proposes a joint opti-mization model with respect to the locations of the
网络环境下大学生的生活方式、学习习惯、价值观念等不断发生改变,这也一定程度上加大高校辅导员的工作难度.文章首先简单介绍高校辅导员的工作职责,分析网络环境下加强辅导员建设的重要性,总结“互联网+”时代下高校辅导员工作模式创新的多种困境,最后,从校园APP、抖音APP、蓝墨云班课平台的应用方面,提出辅导员工作载体优化措施,也探究辅导员工作模式创新激励机制,以期促进网络环境下高校辅导员工作模式的不断创新和教育水平的不断提升.