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Spatial Differentiation Characteristics and Driving Factors of Soil Organic Carbon in Various Landscape Complexes

Huanjing Kexue/Environmental Science 2025年第3期46卷 1679-1689页

作者： Kong, Chen-Chen Yan, Fang Wang, Wei-Rui Zhang, Shi-Wen guo, Dan-Dan Wang, shan School of Earth and Environment Anhui University of Science & Technology Huainan232001 China Beijing Cultivated Land Construction and Protection Center Beijing100020 China

Investigating the spatial differentiation characteristics of soil organic carbon（SOC）in regional agricultural land and analyzing its driving factors are important for screening auxiliary variables for SOC prediction in agricultural land and the accurate prediction of soil carbon stock. This study considered SOC in different types of agricultural land landscape complexes in Beijing as the research object. The differences in SOC content and its stock in different landscape complexes were explored based on the long-term positional monitoring data on the quality of cultivated land in Beijing and the field sampling and testing data. Utilizing multi-source and open-source data as environmental variables that affected SOC spatial differentiation，we explored the quantitative and spatial relationships between SOC and climate，topography，soil parent material，land use，and biomass factors in different landscape complexes through GeoDetector and geographically weighted regression modeling. Additionally，we constructed a structural equation model to reveal the pathways that influence each driving factor on SOC in terms of direct and indirect effects. Ultimately，the major controlling factors of SOC were identified in the study area. The results showed that：① The mean values of ω（SOC）for various types of landscape complexes in the study area ranged from 6.23 to 28.26 g·kg−1，with a variation coefficient of 3.80% to 33.92%，showing spatial heterogeneity. ② Climate，topography，soil parent material，land type，and biomass factors contributed to SOC at highly significant levels（P © 2025 Science Press. All rights reserved.

关键词： Soil testing

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Deciphering fungal metabolon coupling tandem inverse-electrondemand Diels-Alder reaction and semipinacol rearrangement for the biosynthesis of spiro polycyclic alkaloids

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Science China Chemistry 2025年第1期68卷 288-296页

作者： Shuai Liu Wen-Qiang Xu Ying-Tong Di Man-Cheng Tang Ding-Kang Chen Ming-Ming Cao Yao-Wen Chang Hong-Yu Tang Chun-Mao Yuan Jun-Bo Yang Zhi-Li Zuo Han guo Zi-Fei Xu Ying Zeng yun-Dong Wu Xiao-Jiang Hao Key Laboratory of Phytochemistry and Natural Medicines(Chinese Academy of Sciences) Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China Lab of Computational Chemistry and Drug Design State Key Laboratory of Chemical OncogenomicsPeking University Shenzhen Graduate SchoolShenzhen 518055China Shenzhen Bay Laboratory Shenzhen 518055China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Microbial Metabolism School of Life Sciences&BiotechnologyShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical UniversityGuiyang 550014China Molecular Biology Experimental Center Germplasm Bank of Wild Species in Southwest ChinaKunming Institute of BotanyChinese Academy of SciencesKunming 650201China yunnan Key Laboratory for Wild Plant Resources Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China Research Unit of Chemical Biology of Natural Anti-Virus Products Chinese Academy of Medical SciencesBeijing 100730China

In the intricate process of natural product biosynthesis,a metabolon can enhance metabolic flux by associating sequential enzymes.A fungal metabolon,comprising of flavin-dependent monooxygenase Spe F and P450 monooxygenase Spe G,is identified in the biosynthesis of spiro polycyclic alkaloids(+)-notoamide B and its diastereomer(+)-versicolamide *** notoamide E as a substance,Spe F/Spe G metabolon can control the stereoselectivity of its 2,3-epoxidation,followed by hydrogen atom ion at C-17 to generate reactive epoxide tau-m A with dienyl iminium ***,(+)-notoamide B and(+)-versicolamide B are produced via tandem nonenzymatic inverse-electron-demand Diels-Alder reaction and semipinacol *** provides the first example of metabolon in the biosynthesis of spiro-prenylated indole alkaloids.

关键词： metabolon Diels-Alder reaction semipinacol rearrangement biosynthesis notoamides spiro polycyclic alkaloids

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Rethinking the diagnosis and treatment of renal anastomotic hemangioma after partial nephrectomy

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World Journal of Clinical Cases 2025年第5期13卷 58-60页

作者： yun-Peng guo Gaurab Pokhrel Yu-Yang Wang Quan Wen Gai Hang Bo Chen Tongliao Clinical Medical College Inner Mongolia Medical UniversityTongliao 028000Inner Mongolia Autonomous RegionChina First Affiliated Hospital of Zhengzhou University Zhengzhou UniversityZhengzhou 450000Henan ProvinceChina Department of Urinary Surgery Tongliao City HospitalTongliao 028000Inner Mongolia Autonomous RegionChina

Renal anastomotic hemangioma(AH)is a rare,benign vascular tumor with unique histopathological features,a disease that is clinically rare,and existing clinical cases offer different treatment *** reported in the text,this is a very unusual case of renal AH with AH secondary to residual renal tissue after renal clear cell carcinoma,describing a rare renal AH and a history of renal clear cell carcinoma,including ultrasound,computed tomography and magnetic re-sonance ***,the available imaging data and the literature do not provide an effective basis for the diagnosis of the disease,raising the lack of un-derstanding and misdiagnosis,where the patient eventually underwent neph-rectomy,but the author is not the most appropriate surgical *** po-stoperative pathological results of the patient are benign lesions,and it is unde-niable that nephrectomy is suspected to be *** reading the literature,we provide different insights into the treatment of the patient,and we hope that this paper can provide some help for the future clinical diagnosis and treatment.

关键词： Anastomotic hemangioma Renal Ultrasound Computed tomography Case report

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CO catalytic oxidation over Pd/CeO2 with different chemical states of Pd

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Rare Metals 2020年第7期39卷 800-805页

作者： guo-Feng Zhou Jian Ma shan Bai Li Wang yun guo School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Research Institute of Industrial Catalysis East China University of Science and TechnologyShanghai 200237China Equipment R&D Center China Nuclear Power Technology Research InstituteShenzhen 518000China

Three Pd/CeO2 catalysts were,respectively,prepared by reduction-deposition and impregnation method(IMP)to investigate the effect of chemical state of Pd on CO *** kinds of surface Pd species,namely PdO and Pdδ+(2<δ≤4)in PdxCe1-xO2,were identified in all Pd/CeO2 samples although their relative ratios in each sample were *** PdxCe1-xO2 species were found to be very active for CO oxidation,and it could act as a channel by which active oxygen species can be transferred from CeO2 to Pd species for CO *** results reveal that the preparation method can severely influence the chemical state of Pd which can further determine the activity for CO oxidation.

关键词： Supported Pd catalyst CeO2 Chemical state of Pd CO oxidation

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YOLOX-SwinT algorithm improves the accuracy of AO/OTA classification of intertrochanteric fractures by orthopedic trauma surgeons

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Chinese Journal of Traumatology 2025年第1期28卷 69-75页

作者： Xue-Si Liu Rui Nie Ao-Wen Duan Li Yang Xiang Li Le-Tian Zhang Guang-Kuo guo Qing-shan guo Dong-Chu Zhao Yang Li He-Hua Zhang Department of Medical Engineering Daping HospitalArmy Medical UniversityChongqing400042China Department of Information Southwest HospitalArmy Medical UniversityChongqing400038China Department of Radiology Daping HospitalArmy Medical UniversityChongqing400042China Division of Trauma and War Injury Daping HospitalArmy Medical University of PLAState Key Laboratory of Trauma and Chemical PoisoningChongqing400042China

Purpose:Intertrochanteric fracture(ITF)classification is crucial for surgical ***,orthopedic trauma surgeons have shown lower accuracy in ITF classification than *** objective of this study was to utilize an artificial intelligence(AI)method to improve the accuracy of ITF ***:We trained a network called YOLOX-SwinT,which is based on the You Only Look Once X(YOLOX)object detection network with Swin Transformer(SwinT)as the backbone architecture,using 762 radiographic ITF examinations as the training ***,we recruited 5 senior orthopedic trauma surgeons(SOTS)and 5 junior orthopedic trauma surgeons(JOTS)to classify the 85 original images in the test set,as well as the images with the prediction results of the network model in *** analysis was performed using the SPSS 20.0(IBM Corp.,Armonk,NY,USA)to compare the differences among the SOTS,JOTS,SOTS+AI,JOTS+AI,SOTS+JOTS,and SOTS+JOTS+AI *** images were classified according to the AO/OTA 2018 classification system by 2 experienced trauma surgeons and verified by another expert in this *** on the actual clinical needs,after discussion,we integrated 8 subgroups into 5 new subgroups,and the dataset was divided into training,validation,and test sets by the ratio of 8:1:***:The mean average precision at the intersection over union(IoU)of 0.5(mAP50)for subgroup detection reached 90.29%.The classification accuracy values of SOTS,JOTS,SOTS+AI,and JOTS+AI groups were 56.24%±4.02%,35.29%±18.07%,79.53%±7.14%,and 71.53%±5.22%,*** paired t-test results showed that the difference between the SOTS and SOTS+AI groups was statistically significant,as well as the difference between the JOTS and JOTS+AI groups,and the SOTS+JOTS and SOTS+JOTS+AI ***,the difference between the SOTS+JOTS and SOTS+JOTS+AI groups in each subgroup was statistically significant,with all p<*** independent samples t-test results showed that

关键词： Artificial intelligence Intertrochanteric fracture Fracture classification Assist diagnosis YOLOX Swin transformer

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基于霍特林模型的中欧班列最佳补贴值

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交通运输系统工程与信息 2025年第1期25卷 289-297页

作者：吴刚杨锋江山郭茜西南交通大学唐山研究院河北唐山063000 西南交通大学交通运输与物流学院河北唐山063000 西南交通大学综合交通运输智能化国家地方联合工程实验室成都611756

随着政府逐年减少对中欧班列运营企业的补贴,班列开行量的增速放缓,部分班列平台货源结构出现剧烈波动。本文将霍特林(Hotelling)模型中客户基于空间分布推广至基于货值分布的情形,构建一个包含地方政府、班列企业、海运企业和托运人的... 详细信息

随着政府逐年减少对中欧班列运营企业的补贴,班列开行量的增速放缓,部分班列平台货源结构出现剧烈波动。本文将霍特林(Hotelling)模型中客户基于空间分布推广至基于货值分布的情形,构建一个包含地方政府、班列企业、海运企业和托运人的博弈模型,旨在确定最优政府补贴额度,并对班列和海运企业明确各自货源市场及制定运价策略进行探讨。首先,根据区域货物的价值分布和不同托运人在运输价格和时间上的偏好差异,构建地方政府、班列企业和海运企业的效用函数。然后,通过网格法求解不同补贴额度下的博弈均衡状态,并分析货值分布、边际运输成本和碳交易价格变化对政府效用和最优补贴值的影响。案例结果显示:当班列补贴值为1200 USD·FEU^(-1)时,政府效用达到最高,此时班列运输和海运的均衡定价分别为8969 USD·FEU^(-1)和4273 USD·FEU^(-1);价值超过252847 USD·FEU^(-1)的货物更倾向于高时效性的班列运输,而低于此价值的货物则偏好低成本的海运;取消班列补贴将导致班列企业竞争力急剧下降和政府效用减少,故地方政府当前需对班列企业维持一定的补贴水平;未来,实现补贴完全退坡的关键在于降低班列运输的边际成本。

关键词：铁路运输补贴 Hotelling模型中欧班列货物时间价值定价

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A new energy efficient management approach for wireless sensor networks in target tracking

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Defence Technology（防务技术） 2021年第3期17卷 932-947页

作者： Ce Pang Gong-guo Xu Gan-lin shan yun-pu Zhang Army Engineering University Hebei Shijiazhuang050003China

This paper mainly studied the problem of energy conserving in wireless sensor networks for target tracking in defensing combats. Firstly, the structures of wireless sensor nodes and networks were illustrated;Secondly, the analysis of existing energy consuming in the sensing layer and its calculation method were provided to build the energy conserving objective function;What’s more, the other two indicators in target tracking, including target detection probability and tracking accuracy, were combined to be regarded as the constraints of the energy conserving objective function. Fourthly, the three energy conserving approaches, containing optimizing the management scheme, prolonging the time interval between two adjacent observations, and transmitting the observations selectively, were introduced;In addition, the improved lion algorithm combined with the Logistic chaos sequence was proposed to obtain sensor management schemes. Finally, simulations had been made to prove the effectiveness of the proposed methods and algorithm.

关键词： Wireless sensor networks Target searching Target tracking Energy efficiency Lion algorithm

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数据驱动的多时间尺度高炉煤气利用率模型预测控制

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控制理论与应用 2025年第1期42卷 189-201页

作者：安剑奇赵国宇何勇李炜俊郭云鹏吴敏中国地质大学(武汉)未来技术学院湖北武汉430074 中国地质大学(武汉)自动化学院湖北武汉430074 复杂系统先进控制与智能自动化湖北省重点实验室湖北武汉430074 地球探测智能化技术教育部工程研究中心湖北武汉430074 娄底华菱云创数智科技有限公司湖南娄底417009

煤气利用率(GUR)是衡量高炉能耗和稳顺运行的重要指标,受布料和送风操作在不同时间尺度下影响.现有对煤气利用率的建模、预测和控制仅在单一时间尺度上进行,忽略了多时间尺度特性,影响预测和控制的准确性.因此,提出一种数据驱动的多时... 详细信息

煤气利用率(GUR)是衡量高炉能耗和稳顺运行的重要指标,受布料和送风操作在不同时间尺度下影响.现有对煤气利用率的建模、预测和控制仅在单一时间尺度上进行,忽略了多时间尺度特性,影响预测和控制的准确性.因此,提出一种数据驱动的多时间尺度高炉煤气利用率模型预测控制方法(MTSGURMPC).首先,根据经验模态分解和相关性分析得到布料和送风对煤气利用率影响的不同尺度;然后,建立布料长时间尺度和送风短时间尺度模型,提出了多时间尺度模型预测控制结构用于快速准确寻找高炉最优操作策略,该结构将煤气利用率划分为不同尺度进行模型预测控制,兼顾了高炉多时间尺度和模型预测控制动态优化特性,不断反馈优化趋近最优解;最后,基于某钢铁厂高炉工业数据进行应用实验,结果表明该方法能够实现煤气利用率准确预测和控制,并有效提高控制精度.

关键词：高炉煤气利用率数据驱动建模多时间尺度系统模型预测控制经验模态分解

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新时期国有企业降本增效工作的管理策略

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价值工程 2025年第3期44卷 62-65页

作者：郭芸天津海运职业学院天津300350

本文针对新时期国有企业在市场竞争中面临的挑战,提出了一系列降本增效的管理策略。主要内容包括国有企业降本增效的重要意义,当前面临的主要问题,以及具体的管理措施。通过优化资源利用、提高企业盈利能力、提升企业竞争力等方面的综... 详细信息

本文针对新时期国有企业在市场竞争中面临的挑战,提出了一系列降本增效的管理策略。主要内容包括国有企业降本增效的重要意义,当前面临的主要问题,以及具体的管理措施。通过优化资源利用、提高企业盈利能力、提升企业竞争力等方面的综合管理,旨在为国有企业实现经济效益最大化、提升核心竞争力提供实用的参考。同时,本文还探讨了如何借鉴先进管理理念和引入科技手段,推动降本增效策略的落地执行,确保企业在激烈的市场竞争中保持优势。本文希望通过系统化的管理策略,帮助国有企业在新时代背景下不断提升管理水平,实现可持续发展。

关键词：国有企业降本增效管理策略效益提升

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The GECAM ground search system for gamma-ray transients

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Science China(Physics,Mechanics & Astronomy) 2025年第3期68卷 161-174页

作者： Ce Cai Yan-Qiu Zhang Shao-Lin Xiong Ping Wang Jian-Hui Li Xiao-Bo Li Cheng-Kui Li Yue Huang Shi-Jie Zheng Li-Ming Song Shuo Xiao Qi-Bin Yi Yi Zhao Sheng-Lun Xie Rui Qiao Yan-Qi Du Zhi-Wei guo Wang-Chen Xue Chao Zheng Jia-Cong Liu Chen-Wei Wang Wen-Jun Tan Yue Wang Jin-Peng Zhang Chao-Yang Li guo-Ying Zhao Xiao-yun Zhao Xiao-Lu Zhang Zhen Zhang Wen-Xi Peng Xiang Ma Jing-Yan Shi Dong-Ya guo Jin Wang Xin-Qiao Li Xiang-Yang Wen Zheng-Hua An Fan Zhang College of Physics and Hebei Key Laboratory of Photophysics Research and Application Hebei Normal UniversityShijiazhuang050024China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing100049China University of Chinese Academy of Sciences Beijing100049China School of Physics and Electronic Science Guizhou Normal UniversityGuiyang550001China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal UniversityGuiyang550001China School of Physics and Optoelectronics Xiangtan UniversityXiangtan411105China School of Computer and Information Dezhou UniversityDezhou253023China Institute of Astrophysics Central China Normal UniversityWuhan430079China

In the era of time-domain,multi-messenger astronomy,the detection of transient events on the high-energy electromagnetic sky has become more important than *** gravitational wave high-energy electromagnetic counterpart all-sky monitor(GECAM)is a dedicated mission to monitor gamma-ray transients,launched in December,2020.A real-time on-board trigger and location software,using the traditional signal-to-noise ratio(SNR)method for blind search,is constrained to relatively bright signals due to the limitations in on-board computing resources and the need for real-time *** this work,we developed a ground-based pipeline for GECAM to search for various transients,especially for weak bursts missed by on-board *** pipeline includes both automatic and manual mode,offering options for blind search and targeted *** targeted search is specifically designed to search for interesting weak bursts,such as gravitational wave-associated gamma-ray bursts(GRBs).From the ground search of the data in the first year,GECAM has been triggered by 54 GRBs and other transients,including soft gamma-ray repeaters,X-ray binaries,solar flares,terrestrial gamma-ray *** report the properties of each type of triggers,such as trigger time and light *** this search pipeline and assuming a soft Band spectrum,the GRB detection sensitivity of GECAM is increased to about 1.1×10^(-8)erg cm^(-2)s^(-1)(10-1000 ke V,burst duration of 20 s).These results demonstrate that the GECAM ground search system(both blind search and targeted search)is a versatile pipeline to recover true astrophysical signals which were too weak to be found in the on-board search.

关键词： gamma-ray sources gravitational waves data analysis gamma-ray telescopes

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