红外多波段成像末制导技术研究现状与展望

随着红外干扰对抗、人工智能、无人协同等技术的不断发展,红外成像制导武器越来越多地面临强背景干扰、强人工干扰、强战术动作干扰等强对抗作战环境,传统的单一波段红外成像探测技术已无法满足复杂战场环境下的目标识别与抗干扰任务,由此红外多波段成像末制导技术受到了广泛关注,按功能阶段划分其主要包括红外多波段图像融合、目标检测和多波段抗干扰技术等。目前,对红外多波段成像末制导技术的研究主要集中在红外多波段图像融合方面,但相关综述较少。从末制导技术现状、多波段信息运用技术现状和未来技术发展方向等角度对红外多波段成像末制导技术进行了综述。首先,对红外多波段成像制导技术的发展现状做出了总结,分析了多波段红外场景特性与波段选段,介绍了国内外现役多波段成像制导武器,并总结了目前红外多波段制导武器面临的主要问题;其次,重点对国内外研究集中的图像融合技术进行了分类和分析;然后,从多波段信息运用角度,介绍了基于红外多波段图像的目标检测、目标识别、抗干扰技术发展现状;最后,对红外多波段成像末制导技术的未来发展趋势进行了展望,分析了群体智能协同化、多模态智能运用与信息融合和探感导一体化智能对抗的重要性。

场景抽象语义综合模型及其在红外弱小目标检测中的应用

多任务、跨域复杂环境下弱小目标准确、稳定检测在红外预警、搜索与跟踪、精确制导等领域具有重要作用。针对当前算法过于依赖人工设计策略与先验知识,以提取目标信息为目的,对于场景信息的挖掘和利用不充分,性能受限且环境适应性不足等问题,提出了基于场景抽象语义综合的弱小目标检测方法。首先,利用交叉注意力、孪生网络、扩展语义图和自学习双通道的方法设计了4种场景抽象语义综合模型。接着,基于4种语义综合模型设计了基于场景语义综合的弱小目标检测网络,将场景类别语义信息引入到红外弱小目标检测过程实现多类复杂背景下红外弱小目标检测。最后,实验结果表明提出的基于自学习双通道语义综合的弱小目标检测算法精确度到达84.24%,召回率达到89.68%。

Identification of serum biomarkers for evaluating seizure outcome after resective epilepsy surgery

Although patients with drug-resistant temporal lobe epilepsy(TLE)achieve good seizure control with resective surgery combined with anti-epileptic drugs(AEDs)treatment,it is still not clear when to withdraw AEDs after the surgery due to a lack of objective strategy for assessing the surgery outcome.Our aim is to identify objective and efficient biomarkers for assessment of surgery outcome to guide postoperative pharmacotherapy.Here,we detected 469 proteins differentially expressed between pre-and post-operative sera of TLE patients with postoperative seizure freedom,and identified six candidate proteins(HBA1,HBB,PRDX2,CA1,CAT and BLVRB)for validation.These six proteins were significantly reduced within three months after surgery,indicating these proteins may be potential biomarkers to assess the surgery outcome for TLE patients in the early stage.Interestingly,we found HBA1 to HBB ratio was superior to individual proteins to evaluate the postoperative surgery outcome with 90.0%sensitivity,90%specificity and area under the curve of 0.960.We also suppose these proteins were derived from epilepsy foci due to the rat experiment results that HBA1,HBB,PRDX2,CA1 and CAT were highly expressed in cerebrospinal fluid of epilepsy rat models.Additionally,HBA1,HBB,PRDX2,CA1 and BLVRB proteins were highly expressed in the sera of TLE patients with postoperative seizure freedom when compared to TLE patients with postoperative seizure and patients with other types of epilepsy,suggesting surgery outcome or the original sites of seizure might be assessed before the operation through monitoring these protein levels in the sera.Our study provides experimental data for establishing objective indicators for assessing seizure freedom after resective surgery and also proposed potential markers for specific diagnoses of TLE and prediction of TLE surgery outcome.