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Task assignment in ground-to-air confrontation based on multiagent deep reinforcement learning

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Defence Technology（防务技术） 2023年第1期19卷 210-219页

作者： jia-yi liu Gang Wang Qiang Fu Shao-hua Yue Si-yuan Wang Air and Missile Defense College Air Force Engineering UniversityXi'an710051China Air Force Engineering University Changle East RoadXi'anShaanxi710051China

The scale of ground-to-air confrontation task assignments is large and needs to deal with many concurrent task assignments and random *** at the problems where existing task assignment methods are applied to ground-to-air confrontation,there is low efficiency in dealing with complex tasks,and there are interactive conflicts in multiagent *** study proposes a multiagent architecture based on a one-general agent with multiple narrow agents(OGMN)to reduce task assignment *** the slow speed of traditional dynamic task assignment algorithms,this paper proposes the proximal policy optimization for task assignment of general and narrow agents(PPOTAGNA)*** algorithm based on the idea of the optimal assignment strategy algorithm and combined with the training framework of deep reinforcement learning(DRL)adds a multihead attention mechanism and a stage reward mechanism to the bilateral band clipping PPO algorithm to solve the problem of low training ***,simulation experiments are carried out in the digital *** multiagent architecture based on OGMN combined with the PPO-TAGNA algorithm can obtain higher rewards faster and has a higher win *** analyzing agent behavior,the efficiency,superiority and rationality of resource utilization of this method are verified.

关键词： Ground-to-air confrontation Task assignment General and narrow agents Deep reinforcement learning Proximal policy optimization(PPO)

Omental mass combined with indirect inguinal hernia leads to a scrotal mass: A case report

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World Journal of Clinical Cases 2021年第26期9卷 7850-7856页

作者： jia-yi liu Shuai-Qi Li Shi-Jie Yao Qian liu Department of Urology Tianjin First Central HospitalSchool of MedicineNankai UniversityTianjin 300192China School of Medicine Nankai UniversityTianjin 300192China

BACKGROUND Primary omental tumors are uncommon,and omental fibromas account for 2%of these *** to the low incidence of omental fibromas and the limited relevant literature,it is challenging for clinicians to make an accurate diagnosis of this condition,especially before *** SUMMARY A 30-year-old man was admitted to the hospital because of a left epididymal mass with vague discomfort for more than 1 mo.A physical examination was performed,and the findings showed that the epididymal mass may have entered the abdominal *** computed tomography was performed in our hospital and revealed a left inguinal hernia with a mass in the hernial contents,and no masses were found in the left epididymis.A traditional inguinal hernia incision was *** hernia contents were found to be of the greater omentum,and a 2.5 cm-diameter mass was found at the distal end of the greater *** scrotum and epididymis did not exhibit other ***,the mass of the greater omentum was *** frozen pathological examination suggested a spindle cell *** postoperative pathological examination suggested that the mass was an omental ***,the patient recovered well and was *** re-examinations were performed at 1 mo and half a year after the operation and showed no obvious *** Due to the low morbidity rate associated with and latent nature of omental tumors,these tumors are difficult to diagnose preoperatively;thorough medical history taking,detailed physical examinations,and necessary imaging auxiliary examinations can help clinicians diagnose and treat these cases.

关键词： Diagnosis Epididymal mass Omental mass Inguinal hernia Angiofibroma Case report

Shearing-force-driven delamination of waste residue into oxidatively stable MXene composites for high-performance Si anode

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Rare Metals 2023年第7期42卷 2226-2237页

作者： Peng liu Zhi-Hao Zhu Wen Zhang jia-yi liu Zhong Su Xin-Hua liu Shi-Chun Yang Chao Lai School of Chemistry and Materials Science Jiangsu Normal UniversityXuzhou221116China School of Transportation Science and Engineering Beihang UniversityBeijing100191China

The low yield of MXene is normally related to the delaminating step,contributing to the key technical challenges in moving toward industrial ***,a shearing-force-driven strategy is proposed for re-exfoliating waste MXene residue to prepare oxidatively stable MXene composites in a low-cost manner,where the strong shear stress in the assisted solvent,such as carbon nanotubes(CNTs),chitosan(CS),and polyacrylamide(PAM)aqueous solutions,acts on the surface of MXene(Ti_(3)C_(2)T_(x))through coordination between hydroxyl and Ti atoms,resulting in a rapid and efficient exfoliation of waste Ti_(3)C_(2)T_(x)residue under ***,this formed coordinate bond helps to stabilize the low-valent Ti atoms on the surface of MXene,thereby enhancing the oxidative stability of Ti_(3)C_(2)T_(x).Besides,the CNT@MXene composite is selected to construct a free-standing membrane to encapsulate Si nanoparticles,achieving a high and reversible capacity after 50 *** work supports the concept of valorizing waste and adopts a fluid shear forceassisted method to re-exfoliate waste residues,which greatly reduces the cost of processing and improves the chemical stability of *** importantly,this work has uncovered a new direction for the commercialization of MXene composites and has significantly improved the realworld applications of MXene-based materials.

关键词： Waste residue Shear stress MXene composites Oxidatively stable Si anode

Roasting and leaching behaviors of vanadium and chromium in calcification roasting–acid leaching of high-chromium vanadium slag

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International Journal of Minerals,Metallurgy and Materials 2018年第5期25卷 515-526页

作者： Jing Wen Tao jiang Mi Zhou Hui-yang Gao jia-yi liu Xiang-xin Xue School of Metallurgy Northeastern University Liaoning Key Laboratory for Recycling Science of Metallurgical Resources

Calcification roasting–acid leaching of high-chromium vanadium slag(HCVS)was conducted to elucidate the roasting and leaching behaviors of vanadium and *** effects of the purity of Ca O,molar ratio between Ca O and V_2O_5(n(Ca O)/n(V_2O_5)),roasting temperature,holding time,and the heating rate used in the oxidation–calcification processes were *** roasting process and mechanism were analyzed by X-ray diffraction(XRD),scanning electron microscopy(SEM),and thermogravimetry–differential scanning calorimetry(TG–DSC).The results show that most of vanadium reacted with Ca O to generate calcium vanadates and transferred into the leaching liquid,whereas almost all of the chromium remained in the leaching residue in the form of(Fe_(0.6)Cr_(0.4))_2O_*** trends of the vanadium and chromium leaching ratios were always opposite because of the competitive reactions of oxidation and calcification between vanadium and chromium with Ca ***,Ca O was more likely to combine with vanadium,as further confirmed by thermodynamic *** the HCVS with Ca O added in an n(Ca O)/n(V_2O_5)ratio of 0.5 was roasted in an air atmosphere at a heating rate of 10°C/min from room temperature to 950°C and maintained at this temperature for 60 min,the leaching ratios of vanadium and chromium reached91.14%and 0.49%,respectively;thus,efficient extraction of vanadium from HCVS was achieved and the leaching residue could be used as a new raw material for the extraction of ***,the oxidation and calcification reactions of the spinel phases occurred at 592and 630°C for n(Ca O)/n(V_2O_5)ratios of 0.5 and 5,respectively.

关键词： high-chromium vanadium slag calcification roasting roasting behaviors leaching behaviors vanadium extraction

In vivo astrocyte-to-neuron reprogramming for central nervous system regeneration:a narrative review

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Neural Regeneration Research 2023年第4期18卷 750-755页

作者： Zuliyaer Talifu jia-yi liu Yun-Zhu Pan Han Ke Chun-jia Zhang Xin Xu Feng Gao Yan Yu Liang-Jie Du jian-Jun Li School of Rehabilitation Capital Medical UniversityBeijingChina Department of Spinal and Neural Functional Reconstruction China Rehabilitation Research CenterBeijingChina Chinese Institute of Rehabilitation Science BeijingChina Center of Neural Injury and Repair Beijing Institute for Brain DisordersBeijingChina Beijing Key Laboratory of Neural Injury and Rehabilitation BeijingChina School of Rehabilitation Sciences and Engineering University of Health and Rehabilitation SciencesQingdaoShandong ProvinceChina

The inability of damaged neurons to regenerate within the mature central nervous system(CNS)is a significant neuroscientific *** are an essential component of the CNS and participate in many physiological processes including blood-brain barrier formation,axon growth regulation,neuronal support,and higher cognitive functions such as *** reprogramming studies have confirmed that astrocytes in the mature CNS can be transformed into functional *** on in vitro work,many studies have demonstrated that astrocytes can be transformed into neurons in different disease models to replace damaged or lost ***,many findings in this field are controversial,as the source of new neurons has been *** review summarizes progress in reprogramming astrocytes into neurons in vivo in animal models of spinal cord injury,brain injury,Huntington’s disease,Parkinson’s disease,Alzheimer’s disease,and other neurodegenerative conditions.

关键词： astrocyte astrocyte-to-neuron central nervous system in vivo nerve regeneration neurological disorders reprogramming review

Heteroatom anchors Fe-Mn dual-atom catalysts with bi-functional oxygen catalytic activity for low-temperature rechargeable flexible Zn-air batteries

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Journal of Energy Chemistry 2024年第3期90卷 610-620,I0014页

作者： Yuting He Hongtao Li yi Wang Yufei jia Yongning liu Qiang Tan State Key Laboratory for Mechanical Behaviour of Materials School of Materials Science&EngineeringXi’an Jiaotong UniversityXi’an 710049ShaanxiChina

M-N-C(M=Fe,Co,Ni,etc.) catalyst owns high catalytic activity in the oxygen catalytic reaction which is the most likely to replace the Pt-based *** it is still a challenge to further increase the active site *** article constructs the high-efficiency FeMn-N/S-C-1000 catalyst to realize ORR/OER bifunctional catalysis by hetero-atom,bimetal(Fe,Mn) doped simultaneously *** evaluated it as bi-functional electro-catalysts,FeMn-N/S-C-1000 exhibits excellent catalytic activity(E_(1/2)=0.924 V,E_(j=10)=1.617 V) in alkaline media,outperforms conventional Pt/C,RuO_(2) and most non-precious-metal catalysts reported recently,Such outstanding performance is owing to N,S co-coordinated with metal to form multi-types of single atom,dual atom active sites to carry out ***,nitrite poison test provides the proof that the active sites of FeMn-N/S-C are more than that of single-atom catalysts to promote catalytic reactions *** better understand the local structure of Fe and Mn active sites,XAS and DFT were employed to reveal that FeMn-N_5/S-C site plays the key role during ***,the FeMn-N/S-C-1000 based low-temperature rechargeable flexible Zn-air also exhibits superior discharge performance and extraordinary durability at-40℃.This work will provide a new idea to design diatomic catalysts applied in low-temperature rechargeable batteries.

关键词： Fe Mn-N/S-C-1000 ORR OER Rechargeable flexible Zn-air batteries

In-situ polymerized PEO-based solid electrolytes contribute better Li metal batteries:Challenges,strategies,and perspectives

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Journal of Energy Chemistry 2024年第5期92卷 548-571页

作者： Zhihui jia Yong liu Haoming Li yi Xiong yingjie Miao Zhongxiu liu Fengzhang Ren School of Materials Science and Engineering Henan Key Laboratory of Non-Ferrous Materials Science&Processing TechnologyHenan University of Science and TechnologyLuoyang 471023HenanChina Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal new Materials and Advanced Processing Technology Henan University of Science and TechnologyLuoyang 471023HenanChina

Polyethylene oxide(PEO)-based solid polymer electrolytes(SPEs)with good electrochemical stability and excellent Li salt solubility are considered as one of the most promising SPEs for solid-state lithium metal batteries(SSLMBs).However,PEO-based SPEs suffer from low ionic conductivity at room temperature and high interfacial resistance with the electrodes due to poor interfacial contact,seriously hindering their practical *** an emerging technology,in-situ polymerization process has been widely used in PEO-based SPEs because it can effectively increase Li-ion transport at the interface and improve the interfacial contact between the electrolyte and ***,we review recent advances in design and fabrication of in-situ polymerized PEO-based SPEs to realize enhanced performance in *** merits and current challenges of various SPEs,as well as their stabilizing strategies are ***,various in-situ polymerization methods(such as free radical polymerization,cationic polymerization,anionic polymerization)for the preparation of PEO-based SPEs are *** addition,the application of in-situ polymerization technology in PEO-based SPEs for adjustment of the functional units and addition of different functional filler materials was systematically discussed to explore the design concepts,methods and working ***,the challenges and future prospects of in-situ polymerized PEO-based SPEs for SSLMBs are also proposed.

关键词： In-situ polymerization Polyethylene oxide Solid polymer electrolytes Lithium metal anodes

Anti-OX40 Antibody Combined with HBc VLPs Delays Tumor Growth in a Mouse Colon Cancer Model

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Biomedical and Environmental Sciences 2024年第2期37卷 187-195页

作者： liu jia jia SU Qiu Dong yi Yao SHEN Li Ping BI Sheng Li National Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and PreventionBeijing 102206China

Objective Combination immunotherapy strategies targeting OX40,a co-stimulatory molecule that can enhance antitumor immunity by modulating the proliferation,differentiation,and effector function of tumor-infiltrating T cells,have attracted much attention for their excellent therapeutic *** this study,we aimed to evaluate the antitumor efficacy of combined anti-OX40 and hepatitis B core viruslike particles(HBc VLPs)therapy using a mouse colon cancer *** Humanized B-h OX40 mice were injected subcutaneously with MC38 colon tumor cells and treated with HBc VLPs+anti-h OX40 *** growth was *** cytometric analysis was performed to evaluate the populations of T cell subsets in the *** The combination of anti-OX40 with HBc VLPs resulted in a significant delay in tumor growth,suggesting that a potent antitumor immunity was induced by the combination *** studies revealed that HBc VLPs+anti-OX40 treatment induced a significant increase in effector T cells(Teffs)and a significant decrease in regulatory T cells(Tregs)in the tumor microenvironment(TME),which accounted for the synergistic antitumor effect of anti-OX40 in combination with HBc *** Combination therapy of anti-h OX40 and HBc VLPs provides synergistic antitumor activity in colon cancer-bearing mice,which may represent a potential design strategy for cancer immunotherapy.

关键词： Anti-OX40 antibody Hepatitis B core virus-like particles Tumor Combination therapy

Association between brain N-acetylaspartate levels and sensory and motor dysfunction in patients who have spinal cord injury with spasticity:an observational case-control study

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Neural Regeneration Research 2023年第3期18卷 582-586页

作者： jia-yi liu Ya-Jing Li Xin-ying Cong Zuliyaer Talifu Xin Zhang Feng Gao jian-Jun Li School of Rehabilitation Capital Medical UniversityBeijingChina Department of Spinal and Neural Function Reconstruction China Rehabilitation Research CenterBeijingChina China Rehabilitation Science Institute BeijingChina Beijing Key Laboratory of Neural Injury and Rehabilitation BeijingChina Center of Neural Injury and Repair Beijing Institute for Brain DisordersBeijingChina Rehabilitation Department Shanghai Huashan HospitalShanghaiChina Department of Medical Imaging China Rehabilitation Research CenterBeijingChina

Spinal cord injury is a severe and devastating disease,and spasticity is a common and severe complication that is notoriously refractory to ***,the pathophysiological mechanisms underlying spasticity and its development remain largely *** goal of the present study was to find differences,if any,in metabolites of the left precentral gyrus and basal ganglia of patients who have spinal cord injury with or without spasticity,and to explore the relationship between the brain metabolite concentrations and clinical ***-six participants were recruited for magnetic resonance spectroscopic examination:23 with spinal cord injury(12 with spasticity and 11 without spasticity)and 13 healthy *** acquired localized proton spectra from the precentral gyrus and basal ganglia via 10 mm^(3) ***,univariate linear regression analysis demonstrated that the lower that the N-acetylaspartate concentration(a marker for neuronal loss)was in the precentral gyrus of the patients,the lower their ASIA(American Spinal Injury Association)light-touch scores,pinprick scores,and motor ***,longer durations of injury were associated with higher N-acetylaspartate levels in the precentral *** with the healthy participants and patients without spasticity,N-acetylaspartate levels in the patients with spasticity were significantly lower in both the precentral gyrus and basal *** N-acetylaspartate levels also correlated with greater sensory and motor dysfunction in the patients who had spinal cord injury with spasticity.

关键词： ASIA motor score ASIA sensory score basal ganglia central nervous system duration of injury magnetic resonance spectroscopy N-acetylaspartate precentral gyrus spasticity spinal cord injury