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Ferroelectric BaTiO_(3) /Pr_(2)O_(3) heterojunction harvesting roomtemperature cold–hot alternation energy for efficiently pyrocatalytic dye decomposition

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Journal of Advanced Ceramics 2024年第1期13卷 44-52页

作者： Zheng Wu taosheng xu Luohong Zhang Tingting Liu Zhansheng Wu Gangqiang Zhu Yanmin Jia School of Environmental and Chemical Engineering Xi’an Key Laboratory of Textile Chemical Engineering AuxiliariesXi’an Polytechnic UniversityXi’an 710048China School of Physics and Information Technology Shaanxi Normal UniversityXi’an 710062China

The strong pyrocatalytic dye decomposition of the BaTiO_(3)/Pr_(2)O_(3) heterojunction catalyst under cold–hot alternation conditions has been demonstrated in this *** pure BaTiO_(3) nanofibers,~54%rhodamine B(RhB)dye is decomposed under the cold–hot alternation of 29–57℃.With the loading content of Pr_(2)O_(3) increases from 0 to 4 wt%,the pyrocatalytic decomposition ratio of RhB solution increases first and then decreases,eventually achieving a maximum of 91%at 3 wt%.The enhanced pyrocatalytic performance after loading Pr_(2)O_(3) can be attributed to an internal electric field of the heterojunction,which effectively separates positive and negative *** strongly pyrocatalytic performance of BaTiO_(3)/Pr_(2)O_(3) makes it hopeful for applications in the dye wastewater treatment through harvesting the environmental cold–hot temperature alternation thermal energy in future.

关键词： pyroelectric materials BaTiO_(3) pyrocatalysis BaTiO_(3)/Pr_(2)O_(3)heterojunction dye decomposition

A Remote Intelligent Greenhouse Distributed Control System Based on ZIGBEE and GPRS

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A Remote Intelligent Greenhouse Distributed Control System B...

交互式双分支特征融合的草莓病害程度快速诊断方法

2013年中国智能自动化学术会议

作者： Ning Su taosheng xu Liangtu Song Shu Yan Department of Automation University of Science and Technology of China Institute of Intelligent Machines Chinese Academy of Sciences

In order to improve the production efficiency and automation of the greenhouse,a new remote intelligent greenhouse control system based on ZIGBEE and GPRS technology is put forward in this *** this system data and commands are transmitted through ZIGBEE and GPRS which not only realizes higher efficiency for the real-time monitoring of multiple greenhouses,but also achieves the remote cluster control of the shutter and sprinkler *** system is composed of a central control unit and multiple field monitoring *** information collecting and field automatic control are implemented by the field monitoring units distributed in each greenhouse,while data display,storage,query, analysis and remote command control are realized by the central control *** test is done in Qinghai Province,*** result indicates that the system bears perfect function and steady performance.

关键词： ZIGBEE GPRS Wireless network Intelligent control Greenhouse control

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农业机械学报 2023年第11期54卷 225-235页

作者：胡晓波许桃胜黄伟王儒敬中国科学技术大学研究生院合肥230026 中国科学院合肥物质科学研究院合肥230031 安徽省智慧农业工程实验室合肥230031

针对现有草莓病害程度诊断方法存在识别精度低、参数量大、推理时间长等问题,提出了一种基于交互式双分支特征融合的草莓病害程度快速诊断方法。该方法首先以短程密集连接模块为基础,构建一种轻量化的交互式双分支特征融合网络(Interact... 详细信息

针对现有草莓病害程度诊断方法存在识别精度低、参数量大、推理时间长等问题,提出了一种基于交互式双分支特征融合的草莓病害程度快速诊断方法。该方法首先以短程密集连接模块为基础,构建一种轻量化的交互式双分支特征融合网络(Interactive bilateral feature fusion network,IBFFNet),用于提取图像的语义特征和细节特征。然后,通过注意力简化的金字塔池化模块获取上下文分支中的多尺度语义特征,利用边缘增强模块丰富空间分支中的边缘细节特征。最后,融合多尺度语义特征和空间细节特征,实现病斑和叶片区域的精确分割。在草莓叶部病害程度数据集上的实验结果显示,IBFFNet2_Seg的平均交并比达到77.8%,在单张NVIDIA GTX1050显卡上处理速度可达40.6 f/s,满足实际应用中对算法实时性和分割精度的要求。此外,在测试集上IBFFNet2_Seg预测病害程度与真实程度的决定系数R2为0.98,说明该模型可以准确预测草莓病害严重程度。本研究可为草莓病害精准防治提供可靠的技术支撑。

关键词：草莓病害语义分割病害程度快速诊断交互式双分支特征融合边缘增强

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基于密度峰值多起始中心的融合聚类算法

计算机工程与应用 2021年第22期57卷 78-85页

作者：梅婕魏圆圆许桃胜中国科学院合肥物质科学研究院智能机械研究所合肥230031 中国科学技术大学合肥230026 安徽省智慧农业工程实验室合肥230031

经典K-Means算法不能有效处理非球型数据集的聚类问题,且聚类目标数需预先指定。SMCL(Self-adaptive Multiprototype-based Competitive Learning)算法是一种K-Means的改进算法,它引入Multi-Prototypes机制,并将距离相近的Prototypes所代表的样本簇融合成聚类簇。在SMCL算法基础上提出DP-SMCL(Density Peak-SMCL)算法,使用密度峰值聚类算法确定初始聚类中心集,借助1-D高斯混合概率密度模型合并以Prototypes为中心的相近子簇来获得精确聚类结果。实验结果表明,DP-SMCL算法可应用于非球型数据集聚类,且能自动确认聚类的目标类别数,相比于K-Means和DBSCAN(Density-Based Spatial Clustering of Applications with Noise)等经典聚类算法能够获得更加准确的聚类结果。同时,与SMCL算法相比,DP-SMCL可以快速完成初始Prototypes的选定,显著提升算法准确率和执行效率。

关键词： K-Means Multi-Prototypes 聚类 1-D高斯混合概率密度模型非球型数据集

Enantio-divergent C–H borylation with two different ligands from a single chiral source

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Science China Chemistry 2025年第1期68卷 226-232页

作者： Rongrong Du Senmiao xu State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics Chinese Academy of Sciences College of Material Chemistry and Chemical Engineering Key Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of Education Hangzhou Normal University University of Chinese Academy of Sciences

Reported here is an iridium-catalyzed enantio-divergent C（sp3）–H borylation of α-gem-dimethyl groups of trifluoromethyl ketone-derived hydrazones to construct a series of acyclic all-carbon quaternary stereocenters with a high level of chiral induction. Two different chiral bidentate boryl ligands from a common chiral source not only can switch the enantioselectivity but also are complementary in terms of the substrate scope.

关键词： asymmetric catalysis C–H borylation all-carbon quaternary stereocenters synthetic methods

Aquaporin-4-IgG-seropositive neuromyelitis optica spectrum disorders:progress of experimental models based on disease pathogenesis

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Neural Regeneration Research 2025年第2期20卷 354-365页

作者： Li xu Huiming xu Changyong Tang Department of Neurology The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina

Neuromyelitis optica spectrum disorders are neuroinflammatory demyelinating disorders that lead to permanent visual loss and motor *** date,no effective treatment exists as the exact causative mechanism remains ***,experimental models of neuromyelitis optica spectrum disorders are essential for exploring its pathogenesis and in screening for therapeutic *** most patients with neuromyelitis optica spectrum disorders are seropositive for IgG autoantibodies against aquaporin-4,which is highly expressed on the membrane of astrocyte endfeet,most current experimental models are based on aquaporin-4-IgG that initially targets *** experimental models have successfully simulated many pathological features of neuromyelitis optica spectrum disorders,such as aquaporin-4 loss,astrocytopathy,granulocyte and macrophage infiltration,complement activation,demyelination,and neuronal loss;however,they do not fully capture the pathological process of human neuromyelitis optica spectrum *** this review,we summarize the currently known pathogenic mechanisms and the development of associated experimental models in vitro,ex vivo,and in vivo for neuromyelitis optica spectrum disorders,suggest potential pathogenic mechanisms for further investigation,and provide guidance on experimental model *** addition,this review summarizes the latest information on pathologies and therapies for neuromyelitis optica spectrum disorders based on experimental models of aquaporin-4-IgG-seropositive neuromyelitis optica spectrum disorders,offering further therapeutic targets and a theoretical basis for clinical trials.

关键词： aquaporin-4 experimental model neuromyelitis optica spectrum disorder pathogenesis

Reducing the measurement errors in nonadiabatic holonomic quantum computers

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 64-70页

作者： Guo-Fu xu Department of Physics Shandong University

Nonadiabatic holonomic quantum computers serve as the physical platform for nonadiabatic holonomic quantum *** quantum computation has entered the noisy intermediate-scale era, building accurate intermediate-scale nonadiabatic holonomic quantum computers is clearly necessary. Given that measurements are the sole means of extracting information, they play an indispensable role in nonadiabatic holonomic quantum computers. Accordingly, developing methods to reduce measurement errors in nonadiabatic holonomic quantum computers is of great importance. However, while much attention has been given to the research on nonadiabatic holonomic gates, the research on reducing measurement errors in nonadiabatic holonomic quantum computers is severely lacking. In this study, we propose a measurement error reduction method tailored for intermediate-scale nonadiabatic holonomic quantum computers. The reason we say this is because our method can not only reduce the measurement errors in the computer but also be useful in mitigating errors originating from nonadiabatic holonomic gates. Given these features,our method significantly advances the construction of accurate intermediate-scale nonadiabatic holonomic quantum computers.

关键词： quantum holonomy quantum computation measurement errors

Mitophagy in acute central nervous system injuries:regulatory mechanisms and therapeutic potentials

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Neural Regeneration Research 2025年第9期20卷 2437-2453页

作者： Siyi xu Junqiu Jia Rui Mao Xiang Cao Yun xu Department of Neurology Nanjing Drum Tower HospitalClinical College of Jiangsu UniversityNanjingJiangsu ProvinceChina Department of Neurology Nanjing Drum Tower HospitalChinese Academy of Medical Science&Peking Union Medical CollegeNanjingJiangsu ProvinceChina Department of Neurology Nanjing Drum Tower HospitalAffiliated Hospital of Medical SchoolNanjing UniversityNanjingJiangsu ProvinceChina State Key Laboratory of Pharmaceutical Biotechnology and Institute of Translational Medicine for Brain Critical Diseases Nanjing UniversityNanjingJiangsu ProvinceChina Jiangsu Key Laboratory for Molecular Medicine Medical School of Nanjing UniversityNanjingJiangsu ProvinceChina Nanjing Neurology Medical Center NanjingJiangsu ProvinceChina

Acute central nervous system injuries,including ischemic stro ke,intracerebral hemorrhage,subarachnoid hemorrhage,traumatic brain injury,and spinal co rd injury,are a major global health *** optimal therapies and improving the long-term neurological functions of patients with acute central nervous system injuries are urgent *** are susceptible to damage after acute central nervous system injury,and this leads to the release of toxic levels of reactive oxygen species,which induce cell ***,a selective form of autophagy,is crucial in eliminating redundant or damaged mitochondria during these *** evidence has highlighted the significant role of mitophagy in acute central nervous system *** this review,we provide a comprehensive overview of the process,classification,and related mechanisms of *** also highlight the recent developments in research into the role of mitophagy in various acute central nervous system injuries and drug therapies that regulate *** the final section of this review,we emphasize the potential for treating these disorders by focusing on mitophagy and suggest future research paths in this area.

关键词： autophagy intracerebral hemorrhage ischemic stroke mitochondria mitochondrial biogenesis mitochondrial quality control mitophagy spinal cord injury subarachnoid hemorrhage traumatic brain injury

Applications of in-situ solid-state nuclear magnetic resonance in methanol to olefins reaction

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Science China Chemistry 2025年第1期68卷 134-151页

作者： Jing Niu Shutao xu Yingxu Wei Zhongmin Liu National Engineering Research Center of Lower-Carbon Catalysis Technology Dalian Institute of Chemical PhysicsChinese Academy of Sciences State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences

The methanol-to-olefins（MTO） reaction offers an alternative pathway for the production of low-carbon olefins from non-oil feedstocks. Fundamental research has been impeded by a lack of comprehensive understanding of its underlying mechanism,despite the significant progress made in industry. In-situ solid-state nuclear magnetic resonance（ss NMR） spectroscopy has emerged as a pivotal tool, offering crucial insights into key species under real-time operando conditions. Furthermore, the host–guest interaction between zeolites or surface species residing on zeolites and the reactant/active intermediates is revealed by the combination of in-situ13C MAS NMR and 2D correlation spectroscopy. Moreover, recent technological advancements in hyperpolarization（HP） methods, including HP129Xe NMR and dynamic nuclear polarization（DNP）, have significantly improved the sensitivity of ss NMR, enabling detailed structural and kinetic analysis as well as the detection of trace species. In this feature article, we summarized recent advancements in（in-situ） ss NMR spectroscopy applied to MTO reaction processes,encompassing mechanistic investigations at various stages and the intricate host–guest interactions. These theoretical insights into the dynamic evolution of MTO reactions lay a solid foundation for the optimization of catalytic processes and the development of efficient catalysts, thereby advancing the techniques towards more sustainable and economical production route for olefins.

关键词： MTO zeolites in-situ ssNMR reactive intermediates reaction mechanism