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Interlayer gap widened TiS_(2) for highly efficient sodium-ion storage

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Journal of Materials Science & Technology 2022年第12期107卷 64-69页

作者： Chengcheng Huang Yiwen Liu Runtian Zheng Zhengwei Yang Zhonghao Miao Junwei Zhang xinhao cai Haoxiang Yu Liyuan Zhang Jie Shu School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China

As an alternative for lithium-ion batteries(LIBs),sodium-ion batteries(SIBs)have lately received tremendous interest due to their abundant reserves as well as low cost.Nevertheless,the lack of suitable anode materials severely hinders the application of sodium-ion batteries.TiS_(2)is elected as a representative material owing to its unique layered structure.But it always suffers from capacity fade due to poor electrochemical kinetics and structural stability.In this work,we fabricate a pre-potassiated TiS_(2)as a host material for sodium storage by an electrochemical pre-potassiation strategy.The intercalation/extraction mechanism,structural changes and reaction kinetics are completely investigated to reveal the outstanding electrochemical property of pre-potassiated TiS_(2)electrode.It turns out that the large interlayer space of pre-potassiated TiS_(2)is conducive to the diffusion of sodium ions,inducing the reduction of entropic barrier for the electrochemical reactions.In addition,the pre-potassiated host structure is still firmly maintained upon repeated cycles.Therefore,the pre-potassiated TiS_(2)presents superior rate capability(165.9 mA h g^(−1) at 1 C and 132.1 mA h g^(−1) at 20 C)and long-term cycling stability(85.3%capacity retention at 5 C after 500 cycles)for SIBs.This research provides an avenue to construct long-life sodium energy storage systems based on pre-potassiated TiS_(2).

关键词： Pre-potassiation TiS_(2) Expanded interlayer gap Anode material Sodium-ion batteries

Organic interlayer engineering of TiS_(2) for enhanced aqueous Zn ions storage

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Journal of Materials Science & Technology 2023年第9期140卷 135-141页

作者： Chengcheng Huang Yiwen Liu Jing Li Zhonghao Miao xinhao cai Zhouxiang Wu Haoxiang Yu Lei Yan Liyuan Zhang Jie Shu School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China

Aqueous rechargeable zinc-ion batteries(ARZIBs)have a bright future for energy storage due to their high energy density and safety.However,for traditional ARZIBs,cathode materials always suffer from the limited space for large-sized zinc ions storage and transport,leading to low Coulombic efficiency and inferior cycling performance.To build a reliable host with large tunnel,1-butyl-1-methylpyrrolidinium ion(PY14^(+))pre-intercalated TiS_(2)(PY14^(+)-TiS_(2))is designed as an alternative intercalation-type electrode.As the insertion organic guest widens the interlayer space of TiS_(2)and buffers the lattice stress generated during the electrochemical cycles,the structural reversibility,cycling stability and kinetics properties of PY14^(+)-TiS_(2) are enhanced greatly.A specific capacity of 130.9 mAh g^(−1) with 84.3%capacity retention over 500 cycles can be achieved at 0.1 A g^(−1).Therefore,this study paves the way for enhancing the aqueous Zn ions storage capability by organic interlayer engineering.

关键词： Pre-intercalation Organic interlayer engineering TiS_(2) Intercalation-type electrode Aqueous zinc-ion batteries

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针对目标检测模型的物理对抗攻击综述

计算机工程与应用 2024年第10期60卷 61-75页

作者：蔡伟狄星雨蒋昕昊王鑫高蔚洁火箭军工程大学导弹工程学院西安710025

深度学习模型容易受到对抗样本的影响,在图像上添加肉眼不可见的微小扰动就可以使训练有素的深度学习模型失灵。最近的研究表明这种扰动也存在于现实世界中。聚焦于深度学习目标检测模型的物理对抗攻击,明确了物理对抗攻击的概念,并介... 详细信息

深度学习模型容易受到对抗样本的影响,在图像上添加肉眼不可见的微小扰动就可以使训练有素的深度学习模型失灵。最近的研究表明这种扰动也存在于现实世界中。聚焦于深度学习目标检测模型的物理对抗攻击,明确了物理对抗攻击的概念,并介绍了目标检测物理对抗攻击的一般流程,依据攻击任务的不同,从车辆检测和行人检测两个方面综述了近年来一系列针对目标检测网络的物理对抗攻击方法,简单介绍了其他针对目标检测模型的攻击、其他攻击任务和其他攻击方式。最后讨论了物理对抗攻击当前面临的挑战,引出了对抗训练的局限性,并展望了未来可能的发展方向和应用前景。

关键词：对抗攻击物理攻击深度学习深度神经网络

基于背景抑制和分类校正的小样本目标检测方法

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应用光学 2024年第2期45卷 405-414页

作者：蔡伟王鑫蒋昕昊杨志勇陈栋火箭军工程大学导弹工程学院陕西西安710025

为进一步提升小样本条件下对空中来袭目标的检测识别成功率,提出一种基于背景抑制和分类校正的小样本目标检测方法。首先,针对空中来袭目标背景前景易混淆问题,在区域候选网络前端引入背景抑制模块,通过抑制背景特征和增强前景特征来减... 详细信息

为进一步提升小样本条件下对空中来袭目标的检测识别成功率,提出一种基于背景抑制和分类校正的小样本目标检测方法。首先,针对空中来袭目标背景前景易混淆问题,在区域候选网络前端引入背景抑制模块,通过抑制背景特征和增强前景特征来减轻目标背景对检测的影响;其次,在背景抑制模块后插入特征聚合模块,聚焦目标特征,通过缓解小样本条件导致目标特征难提取、不明显的问题,校正网络模型的分类参数;最后,在检测头网络中引入对比分支,增强了类别内相似性和类别间独特性,缓解来袭目标“类间相似性高,类内差异性大”的问题,实现了对网络分类的进一步校正。实验结果表明,所提出的算法在1、2、3、5、10 shot实验中均表现最佳,平均精度分别达到28.3%、32.8%、39.9%、42.9%和56.2%,提升了小样本空中来袭目标的检测性能。

关键词：小样本目标检测空中来袭目标背景抑制分类校正深度学习

双水相提取小蓟多酚工艺优化及其生物活性研究

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北方园艺 2024年第11期 88-96页

作者：蔡静张景怡叶润段宝卿黄雅琴刘新浩信阳农林学院药学院河南信阳464000 信阳农林学院中心实验室河南信阳464000

以信阳小蓟为试材,采用乙醇-(NH_(4))_2SO_4双水相法(ATPE)提取多酚,研究了多酚的提取工艺及其对淀粉消化酶的抑制作用和对亚硝酸盐的清除能力,以期为小蓟多酚作为降血糖药品或食品添加剂的开发利用提供参考依据。结果表明:最佳提取工... 详细信息

以信阳小蓟为试材,采用乙醇-(NH_(4))_2SO_4双水相法(ATPE)提取多酚,研究了多酚的提取工艺及其对淀粉消化酶的抑制作用和对亚硝酸盐的清除能力,以期为小蓟多酚作为降血糖药品或食品添加剂的开发利用提供参考依据。结果表明:最佳提取工艺条件为(NH_(4))_2SO_4质量分数23%,乙醇质量分数26%,提取时间60 min,液料比30∶1 mL·g^(-1),提取温度81℃。在此条件下,多酚得率为(9.36±0.51)mg·g^(-1),对α-淀粉酶和α-葡萄糖苷酶抑制率的IC_(50)值分别为0.014 mg·mL^(-1)和0.061 mg·mL^(-1),明显优于阿卡波糖,且对亚硝酸盐的清除率高达82.05%,表现出良好的降血糖活性和清除亚硝酸盐的能力。

关键词：小蓟多酚双水相提取 α-淀粉酶 α-葡萄糖苷酶亚硝酸盐

猫爪草多酚双水相提取工艺优化及抗氧化活性研究

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食品科技 2024年第5期49卷 216-224页

作者：蔡静刘琦叶润刘新浩孙伟乔新荣王星霈李笑格信阳农林学院药学院河南信阳464000 信阳农林学院中心实验室河南信阳464000

通过优化猫爪草多酚的提取工艺及分析其抗氧化活性,以提高猫爪草的综合利用率。研究采用超声辅助PEG6000-柠檬酸钠双水相法提取猫爪草多酚,通过响应面法优化其提取工艺,并从多酚提取液对1,1-二苯基-2-三硝基苯肼(1,1-Diphenyl-2-picrylh... 详细信息

通过优化猫爪草多酚的提取工艺及分析其抗氧化活性,以提高猫爪草的综合利用率。研究采用超声辅助PEG6000-柠檬酸钠双水相法提取猫爪草多酚,通过响应面法优化其提取工艺,并从多酚提取液对1,1-二苯基-2-三硝基苯肼(1,1-Diphenyl-2-picrylhydrazyl,DPPH)自由基清除率、2,2-联氨-双-3-乙基苯并噻唑啉-6-磺酸(2,2’-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid),ABTS)阳离子自由基清除率和铁离子还原能力3个方面分析其抗氧化活性。结果表明,猫爪草多酚的最佳提取工艺条件为:柠檬酸钠质量分数15%、PEG6000添加量1.6 g、投料质量0.8 g、超声时间30 min,在此条件下,多酚提取量为0.408 mg/g,约是文献报道的1.6倍。该法得到的猫爪草多酚提取液对DPPH自由基和ABTS阳离子自由基均具有较好的清除能力,其IC_(50)值分别为1.302 mg/L和0.6624 mg/L,且具有一定的还原能力。因此,超声辅助双水相法作为一种新型提取和分离方法,可高效、快速提取猫爪草中的多酚。猫爪草多酚具有良好的体外抗氧化活性,可进一步开发为天然抗氧化剂。

关键词：猫爪草多酚双水相提取响应面优化抗氧化活性

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可见光条件下伪装目标智能化分割算法综述

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火箭军工程大学学报 2024年第2期38卷 72-87页

作者：蔡伟高蔚洁蒋昕昊王鑫狄星雨火箭军工程大学

对可见光下的伪装目标分割（Camouflage Objects Segmentation,COS）算法的国内外研究现状进行了梳理。首先，将COS的26个模型分为多阶段学习、联合辅助任务和引入额外先验信息3类，阐述了这3类方法的核心思想及各自的优势和不足；其次... 详细信息

对可见光下的伪装目标分割（Camouflage Objects Segmentation,COS）算法的国内外研究现状进行了梳理。首先，将COS的26个模型分为多阶段学习、联合辅助任务和引入额外先验信息3类，阐述了这3类方法的核心思想及各自的优势和不足；其次，详细介绍了COS常用的4个评价指标和8个公共数据集；然后，在3个公共数据集上对这些模型进行定量、定性的分析评估；最后，介绍了COS的主要应用领域，指出了现有算法的局限性，并对COS未来的研究方向进行了探讨。

关键词：伪装目标分割深度学习多阶段学习辅助任务先验信息

Treatment of Heavy Metal Pollution in Sediment and Its Resource Utilization in Building Ceramics

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Asian Agricultural Research 2023年第5期15卷 14-16页

作者： Chenhao LIANG Lidan cai Zhuoxu NIE xinhao ZHAO Chen WANG Xiaohong XIONG College of Urban Construction Jiangxi University of TechnologyNanchang 330022China College of Business Nanchang Jiaotong InstituteNanchang 330022China

With the rapid development of China's social economy and the acceleration of urbanization,a large quantity of production and domestic sewage is discharged into rivers and lakes,and the concentration of pollutants leads to serious excessive heavy metals in sediment,which affects the ecological environment.In this paper,the treatment technology of heavy metal pollution in sediment and its resource utilization in building ceramics in China are systematically analyzed and summarized,in order to provide a reference for the treatment of sediment in rivers and lakes and the sustainable development of building ceramics industry.

关键词： Sediment Building ceramics Resource utilization Research progress

Optimization of Extraction Conditions of Pomegranate Peel Polyphenols and Its Protective Effect on Acute Alcoholic Liver Injury in Mice

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Agricultural Biotechnology 2023年第4期12卷 16-21,40页

作者： Dianwu KONG Miao cai Jing LI Xinyu HAO xinhao YANG Xianglong WANG Liyan LI Medical School Huanghe Science and Technology CollegeZhengzhou 450063China

[Objectives]This study was conducted to explore the optimization of ultrasonic-assisted organic solvent extraction of pomegranate peel polyphenols(PPPs),and to study the protective effect of PPPs on acute alcoholic liver injury in mice.[Methods]The optimal extraction conditions of PPPs were determined by single factor and orthogonal experiments,and an acute alcoholic liver injury model in mice was established.Bifendate was used as the positive control group to investigate the protective effect of low,medium and high doses of PPPs on acute alcoholic liver injury.[Results]The optimum extraction process parameters were followed as 60%ethanol concentration,solid-liquid ratio of 1:40(w/v),extraction temperature of 50℃,and extraction time of 1.5 h,and the yield was 1.42%.The results of animal experiments showed that PPPs could effectively reduce the degree of alcoholic liver injury in mice,reduce the levels of serum alanine aminotransferase(ALT)and aspartate aminotransferase(AST),and reduce the inflammation and necrosis of liver tissue in mice.Meanwhile,the total polyphenols from pomegranate peel also significantly reduced the expression levels of malondialdehyde(MDA),tumor necrosis factor(TNF-α)and interleukin-6(IL-6)in mice,and increased the levels of superoxide dismutase(SOD)and reduced glutathione(GSH)in liver tissue of mice,indicating its antioxidant and anti-inflammatory effects,further illustrating its protective effect on alcoholic liver injury.[Conclusions]PPPs could reduce the expression levels of TNF-α,IL-6 and MDA in mice,and increase the expression levels of SOD and GSH to achieve the protective effect on acute alcoholic liver injury in mice.This study will provide new ideas for the development of new anti-alcoholic liver injury drug resources.

关键词： Pomegranate peel polyphenols Extraction condition optimization Alcoholic liver injury Oxidative stress Inflammatory factor