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Multi-Dimensional Composite Frame as Bifunctional Catalytic Medium for Ultra-Fast Charging Lithium-Sulfur Battery

Nano-Micro Letters 2022年第12期14卷 91-105页

作者： Shuhao Tian Qi Zeng Guo Liu Juanjuan Huang Xiao Sun Di Wang Hongcen Yang Zhe Liu xichao mo Zhixia Wang Kun Tao Shanglong Peng National and Local Joint Engineering Laboratory for Optical Conversion Materials and Technology School of Materials and EnergyLanzhou UniversityLanzhou 730000People’s Republic of China School of Physical Science and Technology Lanzhou UniversityLanzhou 730000People’s Republic of China

The shuttle effect of soluble lithium polysulfides(LiPSs)between electrodes and slow reaction kinetics lead to extreme inefficiency and poor high current cycling stability,which limits the commercial application of Li-S batteries.Herein,the multi-dimensional composite frame has been proposed as the modified separator(MCCoS/PP)of Li-S battery,which is composed of CoS_(2) nanoparticles on alkali-treated MXene nanosheets and carbon nanotubes.Both experiments and theoretical calculations show that bifunctional catalytic activity can be achieved on the MCCoS/PP separator.It can not only promote the liquid-solid conversion in the reduction process,but also accelerate the decomposition of insoluble Li_(2)S in the oxidation process.In addition,LiPSs shuttle effect has been inhibited without a decrease in lithium-ion transference numbers.Simultaneously,the MCCoS/PP separator with good LiPSs adsorption capability arouses redistribution and fixing of active substances,which is also beneficial to the rate performance and cycling stability.The Li-S batteries with the MCCoS/PP separator have a specific capacity of 368.6 mAh g^(−1) at 20C,and the capacity decay per cycle is only 0.033%in 1000 cycles at 7C.Also,high area capacity(6.34 mAh cm^(−2))with a high sulfur loading(7.7 mg cm^(−2))and a low electrolyte/sulfur ratio(7.5μL mg^(−1))is achieved.

关键词： MXenes Transition metal sulfides Lithium-ion transference Bifunctional catalysis Reaction kinetics

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Bionic Hand motion Control Method Based on Imitation of Human Hand movements and Reinforcement Learning

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Journal of Bionic Engineering 2024年第2期21卷 764-777页

作者： Jibo Bai Baojiang Li xichao Wang Haiyan Wang Yuting Guo The School of Electrical Engineering Shanghai DianJi UniversityShanghai201306China

Bionic hands are promising devices for assisting individuals with hand disabilities in rehabilitation robotics.Controlled primarily by bioelectrical signals such as myoelectricity and EEG,these hands can compensate for lost hand functions.However,developing model-based controllers for bionic hands is challenging and time-consuming due to varying control parameters and unknown application environments.To address these challenges,we propose a model-free approach using reinforcement learning(RL)for designing bionic hand controllers.Our method involves mimicking real human hand motion with the bionic hand and employing a human hand motion decomposition technique to learn complex motions from simpler ones.This approach significantly reduces the training time required.By utilizing real human hand motion data,we design a multidimensional sampling proximal policy optimization(PPO)algorithm that enables efficient motion control of the bionic hand.To validate the effectiveness of our approach,we compare it against advanced baseline methods.The results demonstrate the quick learning capabilities and high control success rate of our method.

关键词： Bionic hand Reinforcement learning motion decomposition Multidimensional sampling PPO algorithm

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Robust multi-sensor image matching based on normalized self-similarity region descriptor

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Chinese Journal of Aeronautics 2024年第1期37卷 271-286页

作者： Xuecong LIU xichao TENG Jing LUO Zhang LI Qifeng YU Yijie BIAN College of Aerospace Science and Engineering National University of Defense TechnologyChangsha 410073China High-Tech Institute Qingzhou 262500China

Multi-modal image matching is crucial in aerospace applications because it can fully exploit the complementary and valuable information contained in the amount and diversity of remote sensing images.However,it remains a challenging task due to significant non-linear radiometric,geometric differences,and noise across different sensors.To improve the performance of heterologous image matching,this paper proposes a normalized self-similarity region descriptor to extract consistent structural information.We first construct the pointwise self-similarity region descriptor based on the Euclidean distance between adjacent image blocks to reflect the structural properties of multi-modal images.Then,a linear normalization approach is used to form modality Independent Region Descriptor(MIRD),which can effectively distinguish structural features such as points,lines,corners,and flat between multi-modal images.To further improve the matching accuracy,the included angle cosine similarity metric is adopted to exploit the directional vector information of multi-dimensional feature descriptors.The experimental results show that the proposed MIRD has better matching accuracy and robustness for various multi-modal image matching than the state-of-the-art methods.MIRD can effectively extract consistent geometric structure features and suppress the influence of SAR speckle noise using non-local neighboring image blocks operation,effectively applied to various multi-modal image matching.

关键词： Remote sensing Multi-modal image matching Template matching Feature descriptor Similarity metric Synthetic Aperture Radar(SAR)

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Lateral root elongation in maize is related to auxin synthesis and transportation mediated by N metabolism under a mixed NO_(3)^(–) and NH_(4)^(+) supply

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Journal of Integrative Agriculture 2024年第3期23卷 1048-1060页

作者： Peng Wang Lan Yang xichao Sun Wenjun Shi Rui Dong Yuanhua Wu Guohua Mi Key Laboratory of Tobacco Biology and Processing of Ministry of Agriculture and Rural Affairs Tobacco Research InstituteChineseAcademy of Agricultural SciencesQingdao 266101China Department of Plant Nutrition College of Resources and Environmental SciencesChina Agricultural UniversityBeijing 100193China College of Resources Hunan Agricultural UniversityChangsha 410128China Agro-Environmental Protection Institute Ministry of Agriculture and Rural AffairsTianjin 300191China

A mixed nitrate (NO_(3)^(–)) and ammonium (NH_(4)^(+)) supply can promote root growth in maize (Zea mays),however,the changes in root morphology and the related physiological mechanism under different N forms are still unclear.Here,maize seedlings were grown hydroponically with three N supplied in three different forms (NO_(3)^(–)only,75/25 NO_(3)^(–)/NH_(4)^(+)and NH_(4)^(+)only).Compared with sole NO_(3)^(–)or NH_(4)^(+),the mixed N supply increased the total root length of maize but did not affect the number of axial roots.The main reason was the increased total lateral root length,while the average lateral root (LR) length in each axle was only slightly increased.In addition,the average LR density of 2nd whorl crown root under mixed N was also increased.Compared with sole nitrate,mixed N could improve the N metabolism of roots (such as the N influx rate,nitrate reductase (NR) and glutamine synthase (GS)enzyme activities and total amino content of the roots).Experiments with exogenously added NR and GS inhibitors suggested that the increase in the average LR length under mixed N was related to the process of N assimilation,and whether the NR mediated NO synthesis participates in this process needs further exploration.Meanwhile,an investigation of the changes in root-shoot ratio and carbon (C) concentration showed that C transportation from shoots to roots may not be the key factor in mediating lateral root elongation,and the changes in the sugar concentration in roots further proved this conclusion.Furthermore,the synthesis and transportation of auxin in axial roots may play a key role in lateral root elongation,in which the expression of ZmPIN1B and ZmPIN9 may be involved in this pathway.This study preliminarily clarified the changes in root morphology and explored the possible physiological mechanism under a mixed N supply in maize,which may provide some theoretical basis for the cultivation of crop varieties with high N efficiency.

关键词： maize NO_(3)^(–)/NH_(4)^(+)ratio lateral root elongation N assimilation indole-3-acetic acid

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Rapid Phase Ambiguity Elimination Methods for DOA Estimator via Hybrid Massive MImo Receive Array

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Chinese Journal of Electronics 2024年第1期33卷 175-184页

作者： xichao ZHAN Zhongwen SUN Feng SHU Yiwen CHEN Xin CHENG Yuanyuan WU Qi ZHANG Yifan LI Peng ZHANG School of Information and Communication Engineering Hainan University School of Electronic and Optical Engineering Nanjing University of Science and Technology

For a sub-connected hybrid multiple-input multiple-output(MImo) receiver with K subarrays and N antennas, there exists a challenging problem of how to rapidly remove phase ambiguity in only single time-slot. A direction of arrival(DOA) estimator of maximizing received power(Max-RP) is proposed to find the maximum value of K-subarray output powers, where each subarray is in charge of one sector, and the center angle of the sector corresponding to the maximum output is the estimated true DOA. To make an enhancement on precision, Max-RP plus quadratic interpolation(Max-RP-QI) method is designed. In the proposed Max-RP-QI, a quadratic interpolation scheme is adopted to interpolate the three DOA values corresponding to the largest three receive powers of Max-RP.To achieve the Cramer Rao lower bound, a Root-MUSIC plus Max-RP-QI scheme is developed. Simulation results show that the proposed three methods eliminate the phase ambiguity during one time-slot and also show low computational complexities. The proposed Root-MUSIC plus Max-RP-QI scheme can reach the Cramer Rao lower bound,and the proposed Max-RP and Max-RP-QI are still some performance losses 2–4 d B compared to the Cramer Rao lower bound.

关键词： Hybrid analog and digital Direction of arrival Massive hybrid multiple-input multiple-output Phase ambiguity Low computational complexity

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Glacial debris flow susceptibility mapping based on combined models in the Parlung Tsangpo Basin,China

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Journal of mountain Science 2024年第4期21卷 1231-1245页

作者： ZHOU Yonghao HU Xiewen XI Chuanjie WEN Hong CAO xichao JIN Tao ZHOU Ruichen ZHANG Yu GONG Xueqiang Faculty of Geosciences and Engineering Southwest Jiaotong UniversityChengdu 611756China School of Architecture and Civil Engineering Xihua UniversityChengdu 610039China

Machine learning(ML)-based prediction models for mapping hazard(e.g.,landslide and debris flow)susceptibility have been widely developed in recent research.However,in some specific areas,ML models have limited application because of the uncertainties in identifying negative samples.The Parlung Tsangpo Basin exemplifies a region prone to recurrent glacial debris flows(GDFs)and is characterized by a prominent landform featuring deep gullies.Considering the limitations of the ML model,we developed and compared two combined statistical models(FA-WE and FA-IC)based on factor analysis(FA),weight of evidence(WE),and the information content(IC)method.The final GDF susceptibility maps were generated by selecting 8 most important static factors and considering the influence of precipitation.The results show that the FA-IC model has the best performance.The areas with a very high susceptibility to GDFs are primarily located in the narrow valley section upstream,on both sides of the valley in the middle and downstream of the Parlung Tsangpo River,and in the narrow valley section of each tributary.These areas encompass 86 gullies and are characterized as"narrow and steep".

关键词： Parlung Tsangpo Basin Glacial debris flow Factor analysis Susceptibility mapping Weight of evidence Information content method.

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世界卫生组织《结核分枝杆菌耐药相关基因突变目录(第2版)》解读

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中国防痨杂志 2024年第3期46卷 260-266页

作者：裴少君欧喜超北京大学公共卫生学院全球卫生学系北京100191 中国疾病预防控制中心传染病溯源预警与智能决策全国重点实验室结核病预防控制中心北京102206

耐药结核病是2035年实现全球终结结核病流行目标的巨大障碍。世界卫生组织(World Health Organization,WHO)倡导采用快速分子药物敏感性检测技术进行耐药结核病早期诊断,而覆盖全面可靠的耐药检测靶标是提高分子药物敏感性检测技术可靠... 详细信息

耐药结核病是2035年实现全球终结结核病流行目标的巨大障碍。世界卫生组织(World Health Organization,WHO)倡导采用快速分子药物敏感性检测技术进行耐药结核病早期诊断,而覆盖全面可靠的耐药检测靶标是提高分子药物敏感性检测技术可靠性的关键。WHO于2023年11月发布《结核分枝杆菌耐药相关基因突变目录(第2版)》,目的是基于更广泛的全球数据汇总形成更为全面准确的耐药相关基因突变目录,为开发与完善基于测序或其他方法的新型分子药物敏感性检测技术提供支持。本文对第2版目录相较于第1版目录在分析流程与耐药突变等内容的更新进行了详细的解读,并对未来目录完善的方向进行了展望。

关键词：分枝杆菌,结核抗药性细菌微生物敏感性试验基因突变

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微小RNA工程化外泌体在糖尿病创面中的作用研究进展

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中华烧伤与创面修复杂志 2024年第2期40卷 190-195页

作者：简喜超邓呈亮遵义医科大学附属医院烧伤整形外科遵义563003

糖尿病创面是糖尿病患者常见的并发症之一,治疗较为困难。目前,糖尿病创面的治疗方法包括清创、功能性敷料覆盖、负压治疗、骨水泥填充、皮肤移植等。微小RNA(miRNA)工程化外泌体具有减轻炎症、刺激血管生成、促进胶原沉积和再上皮化等... 详细信息

糖尿病创面是糖尿病患者常见的并发症之一,治疗较为困难。目前,糖尿病创面的治疗方法包括清创、功能性敷料覆盖、负压治疗、骨水泥填充、皮肤移植等。微小RNA(miRNA)工程化外泌体具有减轻炎症、刺激血管生成、促进胶原沉积和再上皮化等功能,在糖尿病创面修复中展现出巨大潜力,相关研究正在积极开展。该文对糖尿病创面的病理生理特征、miRNA与外泌体的特性、外泌体负载miRNA的工程化方法和miRNA工程化外泌体促进糖尿病创面愈合的机制进行综述,以期为miRNA工程化外泌体在糖尿病创面中的临床应用提供参考依据。

关键词：外泌体微RNAs 糖尿病创面修复

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《中国哲学与欧洲的哲学家》(下卷)评介

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国际汉学 2024年第1期 133-140页

作者：荣喜朝首都师范大学文学院河南科技大学外国语学院

“中学西传”,具体来说就是中国文化在西方1的传播和影响。这是个非常有意义的课题。自20世纪末以来,中日两国在该领域都取得了长足的进步。有意思的是当堀池信夫(1947-2019)先生致力探明中国思想、文化对欧洲著名哲学家产生的影响时,... 详细信息

“中学西传”,具体来说就是中国文化在西方1的传播和影响。这是个非常有意义的课题。自20世纪末以来,中日两国在该领域都取得了长足的进步。有意思的是当堀池信夫(1947-2019)先生致力探明中国思想、文化对欧洲著名哲学家产生的影响时,中国学者张西平先生也在从事同样的研究。堀池先生认为该事实“非常清楚地表明现在我们研究中国哲学的意义以及该研究被赋予的时代要求”2。他将“中学西传”研究上升到时代所需的高度。

关键词：中学西传传播和影响哲学家中日两国欧洲

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基于改进灰狼优化算法的舰载机着舰调度

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北京航空航天大学学报 2024年第3期50卷 803-813页

作者：刘玉杰韩维苏析超郭放海军航空大学航空基础学院烟台264001 海军招收飞行学员工作办公室北京100071 海军航空大学航空作战勤务学院烟台264001

针对第一类着舰模式下的舰载机着舰调度问题进行了研究,建立着舰调度模型,以最小化加权着舰延误时间和、着舰完成时间为优化目标,考虑舰载机战损程度、剩余燃油量的影响。为减轻人工调度的负担,提出一种改进灰狼优化(IGWO)算法对调度模... 详细信息

针对第一类着舰模式下的舰载机着舰调度问题进行了研究,建立着舰调度模型,以最小化加权着舰延误时间和、着舰完成时间为优化目标,考虑舰载机战损程度、剩余燃油量的影响。为减轻人工调度的负担,提出一种改进灰狼优化(IGWO)算法对调度模型进行优化求解,在灰狼优化(GWO)算法的基础上,改进算法选择历史最优解灰狼个体为α狼,引入混沌算子,设置算法参数更新控制变量,以应对GWO算法后期收敛速度慢、可能陷入局部最优解的缺点。通过不同规模着舰调度案例仿真和算法对比,验证了IGWO算法的有效性,所提算法在30、60、90机规模着舰调度案例中的优化效果均优于对比算法,证明其具备一定工程应用价值。

关键词：舰载机着舰调度灰狼优化算法参数控制混沌算子

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