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Investigation on Cu promotion effect on Ce-based solid solution-anchored Rh single atoms for three-way catalysis

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Chinese Chemical Letters 2025年第02期36卷 574-578页

作者： Jianing He Xiao wang Zijian wang Ruize Jiang ke wang Rui Zhang Huilin wang Baokang Geng Hongyi Gao Shuyan Song Hongjie Zhang State key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences School of Applied Chemistry and Engineering University of Science and Technology of China China School of Materials Science and Engineering University of Science and Technology Beijing Department of Chemistry Tsinghua University

The three-way catalyst（TWC）, as a promising approach to control automobile exhaust emission, has been widely studied and applied. However, it still suffers from the high light-off temperature and poor ***, we synthesized a multicomponent catalyst Rh/Cu-CeSn by using Cu metal doping to modify the Ce-based solid solution, which exhibited good TWC catalytic performance: the light-off temperatures for CO, NO, and C3H6conversion are 172 ℃, 266 ℃, and 193 ℃, respectively. Moreover, the catalyst still maintained good activity after 12 h of the continuous reaction under high-temperature conditions. The experiments and mechanism studies reveal that due to the redox pair Cu+/Cu2+, the Cu incorporation can effectively inhibit the Rh transition to the oxidation state and greatly enhance the catalytic activity and stability. This work provides a viable strategy for precise characteristic modulation of composite oxide supports during the fabrication of noble metal-based catalysts, which significantly reduces environmental pollution from energy applications.

关键词： Co-precipitation Oxygen vacancies Rhodium (Rh) catalyst Solid solution Three-way catalysts (TWC)

Latitudinal patterns of tree β-diversity and relevant ecological processes vary across spatial extents in forests of southeastern China

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Plant Diversity 2025年第1期47卷 89-97页

作者： Maochou Liu Wenxiang Wu ke wang Xinshuai Ren Xueqin Zhang Lei wang Jing Geng Bo Yang key Laboratory of Land Surface Pattern and Simulation Institute of Geographic and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Department of Environment and Resources University of Chinese Academy of SciencesBeijing 100049China Zhai Mingguo Academician Work Station Sanya UniversitySanya 572022China

Latitudinal patterns of treeβ-diversity reveal important insights into the biogeographical processes that influence forest *** previous studies have extensively documentedβ-diversity within relatively small spatial extents,the potential drivers ofβ-diversity along latitudinal gradients are still not well understood at larger spatial *** this study,we determined whether treeβ-diversity is correlated with latitude in forests of southeastern China,and if so,what ecological processes contribute to these patterns of treeβ-*** specifically aimed to disentangle the relative contributions from interspecific aggregation and environmental filtering across various spatial *** delineated regional communities comprising multiple nearby national forest inventory(NFI)plots around random focal *** number of NFI plots in a regional community served as a surrogate for spatial *** also used a null model to simulate randomly assembled communities and quantify the deviation(β-deviation)between observed and expectedβ-*** found thatβ-diversity decreased along a latitudinal gradient and that this pattern was clearer at larger spatial *** addition,latitudinal patterns ofβ-deviation were explained by the degree of species spatial *** also identified environmental factors that driveβ-deviation in these forests,including precipitation,seasonality,and temperature *** larger spatial extents,these environmental variables explained up to 84%of theβ-*** results reinforce that ecological processes are scale-dependent and collectively contribute to theβ-gradient in subtropical *** recommend that conservation efforts maintain diverse forests and heterogeneous environments at multiple spatial extents to mitigate the adverse effects of climate change.

关键词： Environmental filtering Latitudinal pattern Forest beta diversity Spatial extent Species spatial aggregation Regional community

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Prediction of remaining parking spaces based on EMD-LSTM-BiLSTM neural network

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Journal of Traffic and Transportation Engineering(English Edition) 2025年第01期 201-213页

作者： Changxi Ma Xiaoting Huang ke wang Yongpeng Zhao School of Traffic and Transportation Lanzhou Jiaotong University

The traffic congestion caused by the mismatch between the demand of car owners and the supply of parking spaces has become one of the severe traffic problems in various places. It is important to predict the remaining parking space which can not only help the driver to plan their trips reasonably but also reduce the pressure on urban road traffic. To reduce the stochastic fluctuations of complex data and improve the predictability of parking spaces, a hybrid prediction model EMD-LSTM-BiLSTM is proposed, which is combined the adaptive ability of empirical mode decomposition(EMD) to process time series data and the advantage of long short-term memory network(LSTM) and bidirectional long short-term memory network(BiLSTM) to solve long-range dependencies. First, the EMD algorithm is employed to decompose the components of different scales in the time series and generate a series of mode functions with the same characteristic scale. Next, the construction,training, and prediction of the LSTM-BiLSTM neural network are completed in the deep learning framework of keras. BiLSTM was built for proposing the bi-directional temporal features of the sequences, and LSTM was responsible for learning the output features,which effectively avoids large prediction errors. Finally, the performance of the model is verified by the actual parking data sets of different parking lots for parking space prediction. The proposed hybrid model is compared with a variety of current mainstream deep learning algorithms, and the effectiveness of the EMD-LSTM-BiLSTM method is *** results may provide some potential insights for parking prediction.

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Processing,microstructure,and mechanical properties of wire arc additively-manufactured AZ91 magnesium alloy using cold arc process

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中国有色金属学报 2025年第1期35卷 91-104页

作者： Bai-hao CAI Ji-kang FAN Jie LI Dong-qing YANG Yong PENG ke-hong wang key Laboratory of Controlled Arc Intelligent Additive Technology Ministry of Industry and Information TechnologyNanjing University of Science and TechnologyNanjing 210094China School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China

Thin walls of an AZ91 magnesium alloy with fine equiaxed grains were fabricated via cold arc-based wire arc additive manufacturing(CA-WAAM),and the droplet transfer behaviours,microstructures,and mechanical properties were *** results showed that the cold arc process reduced splashing at the moment of liquid bridge breakage and effectively shortened the droplet transfer *** microstructures of the deposited samples exhibited layered characteristics with alternating distributions of coarse and fine *** layer-by-layer deposition,the β-phase precipitated and grew preferentially along grain boundaries,while the fineη-Al_(8)Mn_(5)phase was dispersed in the α-Mg *** mechanical properties of the CA-WAAM deposited sample showed isotropic *** ultimate tensile strength and elongation in the building direction(BD)were 282.7 MPa and 14.2%,*** microhardness values of the deposited parts were relatively uniform,with an average value of HV 69.6.

关键词： AZ91 magnesium alloy droplet transfer microstructure mechanical properties cold arc process

Air target intent recognition method combining graphing time series and diffusion models

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Chinese Journal of Aeronautics 2025年第1期38卷 507-519页

作者： Chenghai LI ke wang Yafei SONG Peng wang Lemin LI Air and Missile Defense College Air Force Engineering UniversityXi’an 710051China

Air target intent recognition holds significant importance in aiding commanders to assess battlefield situations and secure a competitive edge in *** in this domain has been hindered by challenges posed by imbalanced battlefield data and the limited robustness of traditional recognition *** by the success of diffusion models in addressing visual domain sample imbalances,this paper introduces a new approach that utilizes the Markov Transfer Field(MTF)method for time series data *** visualization,when combined with the Denoising Diffusion Probabilistic Model(DDPM),effectively enhances sample data and mitigates noise within the original ***,a transformer-based model tailored for time series visualization and air target intent recognition is *** experimental results,encompassing comparative,ablation,and denoising validations,reveal that the proposed method achieves a notable 98.86%accuracy in air target intent recognition while demonstrating exceptional robustness and generalization *** approach represents a promising avenue for advancing air target intent recognition.

关键词： Intent Recognition Markov Transfer Field Denoising Diffusion Probability Model Transformer Neural Network

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Digital PCR-free technologies for absolute quantitation of nucleic acids at single-molecule level

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Chinese Chemical Letters 2025年第2期36卷 118-126页

作者： Xinyi Luo ke wang Yingying Xue Xiaobao Cao Jianhua Zhou Jiasi wang Guangdong Provincial key Laboratory of Sensor Technology and Biomedical Instrument School of Biomedical Engineering Shenzhen Campus of Sun Yat-sen University School of Biomedical Engineering Sun Yat-sen University Guangzhou National Laboratory Guangzhou International Bio Island

Ultrasensitive detection of nucleic acids is of great significance for precision medicine. Digital polymerase chain reaction (dPCR) is the most sensitive method but requires sophisticated and expensive instruments and a long reaction time. Digital PCR-free technologies, which mean the digital assay not relying on thermal cycling to amplify the signal for quantitative detection of nucleic acids at the singlemolecule level, include the digital isothermal amplification techniques (d IATs) and the digital clustered regularly interspaced short palindromic repeats (CRISPR) technologies. They combine the advantages of d PCR and IATs, which could be fast and simple, enabling absolute quantification of nucleic acids at a single-molecule level with minimum instrument, representing the next-generation molecular diagnostic technology. Herein, we systematically summarized the strategies and applications of various dIATs, including the digital loop-mediated isothermal amplification (dLAMP), the digital recombinase polymerase amplification (dRPA), the digital rolling circle amplification (dRCA), the digital nucleic acid sequencebased amplification (d NASBA) and the digital multiple displacement amplification (d MDA), and evaluated the pros and cons of each method. The emerging digital CRISPR technologies, including the detection mechanism of CRISPR and the various strategies for signal amplification, are also introduced comprehensively in this review. The current challenges as well as the future perspectives of the digital PCR-free technology were discussed.

关键词： Absolute quantification Digital bioassay Digital CRISPR/Cas Isothermal amplification Nucleic acid detection

Peri-centrosomal localization of small interfering RNAs in C. elegans

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Science China Life Sciences 2025年

作者： Qile Jin Xuezhu Feng Minjie Hong ke wang Xiangyang Chen Jiewei Cheng Yan Kuang Xiaoyue Si Mingjing Xu Xinya Huang Shouhong Guang Chengming Zhu Department of Obstetrics and Gynecology The First Affiliated Hospital of USTC The USTC RNA Institute Hefei National Research Center for Physical Sciences at the Microscale School of Life Sciences Division of Life Sciences and Medicine Biomedical Sciences and Health Laboratory of Anhui Province University of Science and Technology of China School of Basic Medicine Anhui Medical University

The centrosome is the microtubule-organizing center and a crucial part of cell division. Centrosomal RNAs(cnRNAs) have been reported to enable precise spatiotemporal control of gene expression during cell division in many species. Whether and how cnRNAs exist in C. elegans are unclear. Here, using the nuclear RNAi Argonaute protein NRDE-3 as a reporter, we observed potential peri-centrosome localized small interfering(si)RNAs in C. elegans. NRDE-3 was previously shown to associate with pre-mRNAs and pre-rRNAs via a process involving the presence of complementary siRNAs. We generated a GFP-NRDE-3 knock-in transgene through CRISPR/Cas9 technology and observed that NRDE-3 formed peri-centrosomal foci neighboring the tubulin protein TBB-2, other centriole proteins and pericentriolar material(PCM)components in C. elegans embryos. The peri-centrosomal accumulation of NRDE-3 depends on RNA-dependent RNA polymerase(RdRP)-synthesized 22G siRNAs and the PAZ domain of NRDE-3, which is essential for siRNA binding. Mutation of eri-1, ergo-1, or drh-3 significantly increased the percentage of pericentrosome-enriched NRDE-3. At the metaphase of the cell cycle, NRDE-3 was enriched in both the peri-centrosomal region and the spindle. Moreover, the integrity of centriole proteins and pericentriolar material(PCM) components is also required for the peri-centrosomal accumulation of NRDE-3. Therefore, we concluded that siRNAs could accumulate in the pericentrosomal region in C. elegans and suggested that the peri-centrosomal region may also be a platform for RNAi-mediated gene regulation.

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脑机接口技术在脑卒中患者下肢功能康复中的应用前景

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中国组织工程研究 2025年第14期29卷 3027-3033页

作者：王珂王雷李文杉公维军云南中医药大学云南省昆明市650000 杭州程天科技发展有限公司浙江省杭州市310000 首都医科大学北京市100000 首都医科大学附属北京康复医院北京市100144

背景:近年来,脑机接口技术通过对动作意图的识别实现对外部设备的操控,改变了人类与计算机的交互方式,可用于脑卒中后下肢功能的治疗,为脑卒中患者康复带来了新的希望。目的:分析和总结近些年脑机接口技术在脑卒中患者下肢运动功能康复... 详细信息

背景:近年来,脑机接口技术通过对动作意图的识别实现对外部设备的操控,改变了人类与计算机的交互方式,可用于脑卒中后下肢功能的治疗,为脑卒中患者康复带来了新的希望。目的:分析和总结近些年脑机接口技术在脑卒中患者下肢运动功能康复中的应用,探讨脑机接口技术在脑卒中患者下肢功能康复中的临床应用价值。方法:以“脑卒中,脑机接口,下肢”为中文检索词,在中国知网进行相关文献检索;以“stroke,brain-computer interfaces,lower extremity”为英文检索词,在PubMed数据库进行相关文献检索,检索时间范围为2014年1月至2024年6月。结果与结论:脑机接口对脑卒中患者下肢运动功能恢复具有良好的应用前景,在康复医学应用领域正在不断扩大,但其机制尚未完全阐释清楚;此外,在采集患者脑电信号方面存在一定的局限,导致脑机接口系统精确识别肢体运动的能力较差,并且目前该技术的解码方法对识别步态周期存在局限性,不能精确定位到下肢各关节与肌肉的随意运动,阻碍了脑机接口技术的应用。未来的研究应该集中在阐明脑机接口技术对脑卒中患者下肢运动功能恢复的神经机制,增强大脑运动信号提取技术和设备,为个体患者制定多模态反馈实现更有效的运动康复,以期推动脑机接口技术在下肢运动功能康复领域的进一步发展,改善患者的康复效果,提高生活质量。

关键词：脑卒中脑机接口下肢运动功能康复综述

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Role of nutrition in diabetes mellitus and infections

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World Journal of Clinical Cases 2025年第3期13卷 1-8页

作者： Xue-Lu Yu Li-Yun Zhou Xiao Huang Xin-Yue Li Ming-ke wang Ji-Shun Yang Naval Medical Center of PLA Naval Medical UniversityShanghai 200052China

In this editorial,we have commented on the article that has been published in the recent issue of World Journal of Clinical *** authors have described a case of unilateral thyroid cyst and have opined that the acute onset of infection may be linked to diabetes mellitus(DM).We have focused on the role of nutrition in the association between DM and *** with DM are at a high risk of infection,which could also be attributed to nutrition-related *** interventions for patients with diabetes are mainly based on a low-calorie diet,which can be achieved by adhering to a low-carbohydrate ***,dietary fiber supplementation is recommended to maintain the diversity of the gut ***,high-quality protein can prevent the increased risk of infection due to *** of vitamins C,vitamins A,vitamins D,and folic acid improves blood sugar control and facilitates immune *** deficiencies augment the risk of infection,but the relationship with diabetes is mostly U-shaped and a good intake should be maintained.

关键词： Diabetes mellitus Infection Macronutrients Vitamins Minerals