基于同步压缩短时傅里叶变换的微型无人机识别

针对利用雷达微多普勒效应的微型无人机识别问题,提出了一种基于同步压缩短时傅里叶变换（Synchrosqueezing Short-Time Fourier Transform,SSTFT）的分类识别方法。首先对无人机的微多普勒回波信号进行SSTFT从而获得信号时频谱,然后对时频谱进行多维度特征提取获得回波信号的时频特征及频率变化特征,最后将所获得联合特征输入到支持向量机（Support Vector Machine,SVM）中进而实现无人机的分类识别。基于实际雷达数据的实验结果表明,所提无人机分类方法准确率可达到97.03%。     

后疫情时代高校毕业生就业意愿的变化分析及对策研究

自新冠肺炎疫情爆发以来,在全国各级政府采取积极防疫措施的背景下,疫情的严峻形势得到缓解、经济发展逐渐复苏,防疫工作也进入了后疫情时代,但整体经济发展动力仍显不足。此外,2020年高校毕业生数量为874万,达到历史峰值,这无形中对高校毕业生就业工作的开展与进行增加了难度,就业形势面临严峻挑战。本文通过对合肥市高校毕业生在后疫情时代的就业意愿与求职行为变化进行调查,以及对企业人资部门的招聘效果和质量进行分析和走访,再对合肥市人力资源社会保障部门进行访谈,详细了解主管部门相关政策的实际落地情况,从而针对突发性公共卫生事件背景下的毕业生就业问题提出对策建议。     

员工敏捷行为研究：概念界定与量表开发

基于相关理论与文献,提出并界定了"员工敏捷行为"这一概念,同时严格按照Hinkin提出的量表开发程序,编制了员工敏捷行为的初始测量量表,采用探索性因子分析技术和验证性因子分析技术对初始量表进行了修订和验证.结果表明:员工敏捷行为是一单维度变量,所开发的包括10个题项的测量量表具有良好的信度和效度,为后续的深入研究奠定了基础.     

Can psychological capital reduce stress and job insecurity? An experimental examination with indian evidence

Increasingly, work stress and job insecurity have become pervasive issues in today’s dynamic workplace. Extant literature suggests that individual psychological resources play a significant role in job insecurity and stress. A review of the literature on psychological capital (PsyCap) suggests that there is a dearth of experimental investigation on the effect of PsyCap interventions (PCI) on stress and job insecurity. The primary purpose of this study is to experimentally examine whether an increase in PsyCap through PCI results in a significant decrease in stress and job insecurity. This experimental investigation was conducted on a sample of 234 adults employed in the telecom sector. This study used a two-group (treatment group and placebo control group) pre-test and post-test design. Subjects were randomly assigned either to the treatment group (N?=?124) or the placebo control group (N?=?110). Findings suggest that those subjects who were given PCI (treatment group) developed their PsyCap and there was a significant reduction in stress and job insecurity. On the contrary, participants of the placebo control group did not report any significant change in stress and job insecurity. Theoretical and managerial implications are discussed.

     

基于低秩稀疏约束的穿墙雷达成像算法

针对穿墙雷达(TWR)成像过程中墙杂波与成像空间分别具有低秩性和稀疏性的特点，提出了一种基于低秩稀疏约束的穿墙雷达成像算法。所提成像算法通过奇异值软阈值法和l1范数最小化技术进行迭代求解低秩稀疏约束优化问题，实现在墙体强反射波存在的探测环境中基于压缩感知框架对墙后隐蔽目标的准确成像重建。仿真和实验数据的处理结果验证了所提成像算法的有效性和准确性。     

基于多测量向量模型的极化探地雷达成像算法

针对极化探地雷达(GPR)工作过程中目标成像空间的联合稀疏性，提出了一种基于多测量向量模型的极化探地雷达成像算法。在建立极化探地雷达回波信号模型的基础上，利用各极化通道测量数据的联合稀疏性将各个极化通道的测量数据等效成多测量向量（MMV），通过多任务贝叶斯压缩感知（MT-BCS）算法对各个极化通道的测量数据进行联合处理从而实现各个极化通道对应的探测场景反射率的重建。基于时域有限差分（FDTD）法的仿真数据处理结果表明所提成像算法在目标位置重建的准确性和背景杂波抑制能力上均优于单测量向量（SMV）模型的极化探地雷达成像算法。