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Eco-evolutionary evidence for the global diversity pattern of Cycas(Cycadaceae)

Journal of Integrative Plant Biology 2024年第6期66卷 1170-1191页

作者： Jian Liu Anders JLindstrom Yiqing gong Shanshan Dong Yusheng(Chris)Liu Shouzhou Zhang xun gong CAS Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China Department of Economic Plants and Biotechnology Yunnan Key Laboratory for Wild Plant ResourcesKunming Institute of BotanyChinese Academy of SciencesKunming 650201China University of Chinese Academy of Sciences Beijing 100049China Global Biodiversity Conservancy 144/124 Moo3Soi Bua ThongBangsalaeSattahipChonburi 20250Thailand Key Laboratory of Southern Subtropical Plant Diversity Fairy Lake Botanical GardenShenzhen&Chinese Academy of SciencesShenzhen 518004China Department of Earth and Environmental Sciences Indiana University-IndianapolisIndianapolisIN 46202USA

The evolution of the latitudinal diversity gradient(LDG),characterized by a peak in diversity toward the tropics,has captured significant attention in evolutionary biology and ***,the inverse LDG(i-LDG)mechanism,wherein species richness increases toward the poles,remains inadequately *** are among one of the oldest lineages of extant seed plants and have undergone extensive diversification in the ***,the extant cycad abundance exhibits an i-LDG pattern,and the underlying causes for this phenomenon remain largely ***,using 1,843 nuclear genes from a nearly complete sampling,we conducted comprehensive phylogenomic analyses to establish a robust species-level phylogeny for Cycas,the largest genus within *** then reconstructed the spatial-temporal dynamics and integrated global environmental data to evaluate the roles of species ages,diversification rates,contemporary environment,and conservatism to ancestral niches in shaping the i-LDG *** found Cycas experienced decreased diversification rates,coupled with the cooling temperature since its origin in the Eocene from continental *** regions have distinctively contributed to the formation of i-LDG for Cycas,with the northern hemisphere acting as evolutionary museums and the southern hemisphere serving as ***,water-related climate variables,specifically precipitation seasonality and potential evapotranspiration,were identified as paramount factors constraining Cycas species richness in the rainforest biome near the ***,the adherence to ancestral monsoonal climates emerges as a critical factor in sustaining the diversity *** study underscores the imperative of integrating both evolutionary and ecological approaches to comprehensively unravel the mechanisms underpinning global biodiversity patterns.

关键词： cycads latitudinal diversity gradient niche conservatism spatiotemporal diversification species richness

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Noise-Tolerant ZNN-Based Data-Driven Iterative Learning Control for Discrete Nonaffine Nonlinear MIMO Repetitive Systems

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IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 344-361页

作者： Yunfeng Hu Chong Zhang Bo Wang Jing Zhao xun gong Jinwu Gao Hong Chen State Key Laboratory of Automotive Simulation and Control Jilin UniversityJilin UniversityChangchun 130025China College of Communication Engineering Jilin UniversityJilin UniversityChangchun 130025China Department of Electromechanical Engineering University of MacaoMacao 999078China School of Artificial Intelligence Jilin UniversityChangchun 130012China IEEE College of Electronics and Information Engineering Tongji UniversityShanghai 200092China

Aiming at the tracking problem of a class of discrete nonaffine nonlinear multi-input multi-output(MIMO) repetitive systems subjected to separable and nonseparable disturbances, a novel data-driven iterative learning control(ILC) scheme based on the zeroing neural networks(ZNNs) is proposed. First, the equivalent dynamic linearization data model is obtained by means of dynamic linearization technology, which exists theoretically in the iteration domain. Then, the iterative extended state observer(IESO) is developed to estimate the disturbance and the coupling between systems, and the decoupled dynamic linearization model is obtained for the purpose of controller synthesis. To solve the zero-seeking tracking problem with inherent tolerance of noise,an ILC based on noise-tolerant modified ZNN is proposed. The strict assumptions imposed on the initialization conditions of each iteration in the existing ILC methods can be absolutely removed with our method. In addition, theoretical analysis indicates that the modified ZNN can converge to the exact solution of the zero-seeking tracking problem. Finally, a generalized example and an application-oriented example are presented to verify the effectiveness and superiority of the proposed process.

关键词： Adaptive control control system synthesis data-driven iterative learning control neurocontroller nonlinear discrete time systems

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Hydrocarbon Generation Potential and Organic Matter Enrichment Mechanism of the Cambrian Marine Shale in the Tadong Low Uplift, Tarim Basin

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ACTA GEOLOGICA SINICA-ENGLISH EDITION 2024年第5期98卷 1301-1321页

作者： Miao, Huan Wang, Yanbin Jiang, Zhenxue Zhao, Shihu Shang, Peng gong, xun Tao, Chuanqi Zhang, Yu China Univ Petr Natl Key Lab Petr Resources & Engn Beijing 102249 Peoples R China China Univ Petr Unconvent Oil & Gas Sci & Technol Res Inst Beijing 102249 Peoples R China China Univ Min & Technol Coll Geosci & Surveying Engn Beijing 100083 Peoples R China SINOPEC Petr Explorat & Prod Res Inst Beijing 102206 Peoples R China PetroChina Changqing Oilfield Co Gas Prod Plant 2 Yulin 719000 Shaanxi Peoples R China Peking Univ Sch Earth & Space Sci Beijing 100871 Peoples R China Liaoning Petrochem Univ Sch Civil Engn Fushun 113001 Liaoning Peoples R China

Cambrian shales in China and elsewhere contain abundant oil and gas resources. However, due to its deep burial and limited outcrop, there has been relatively little research conducted on it. The Cambrian shale of the Tadong low uplift in the Tarim Basin of western China, specifically the Xidashan-Xishanbulake Formation (Fm.) and overlying Moheershan Fm. provide a case study through the use of organic petrology, mineralogy, organic and elemental geochemistry, with the aim of analyzing and exploring the hydrocarbon generation potential (PG) and organic matter (OM) enrichment mechanisms within these shale formations. The results indicate that: (1) the Cambrian shale of the Tadong low uplift exhibits relatively dispersed OM that consists of vitrinite-like macerals and solid bitumen. These formations have a higher content of quartz and are primarily composed of silica-based lithology; (2) shale samples from the Xidashan-Xishanbulake and Moheershan formations demonstrate high total organic carbon (TOC) and low S-2 content. The OM is predominantly type I and type II kerogens, indicating a high level of maturation in the wet gas period. These shales have undergone extensive hydrocarbon generation, showing characteristics of relatively poor PG; (3) the sedimentary environments of the Xidashan-Xishanbulake and Moheershan formations in the Tadong low uplift are similar. They were deposited in warm and humid climatic conditions, in oxygen-deficient environments, with stable terrigenous inputs, high paleoproductivity, high paleosalinity, weak water-holding capacity, and no significant hydrothermal activity; and (4) the relationship between TOC and the paleoproductivity parameter (P/Ti) is most significant in the Lower Cambrian Xidashan-Xishanbulake Fm., whereas correlation with other indicators is not evident. This suggests a productivity-driven OM enrichment model, where input of land-derived material was relatively small during the Middle Cambrian, and the ancient water exhibi

关键词： Conventional resources hydrocarbon generation potential geochemistry sedimentary environment enrichment mechanism organic matter Cambrian Tadong low uplift SOUTH CHINA CONSTRAINTS SOURCE-ROCK EVALUATION TURPAN-HAMI BASIN GEOCHEMICAL CHARACTERISTICS BLACK SHALES RARE-EARTH NW CHINA LOWER ORDOVICIAN SILICEOUS ROCKS TRACE-ELEMENTS

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Correlation between the gut microbiome and neurodegenerative diseases:a review of metagenomics evidence

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Neural Regeneration Research 2024年第4期19卷 833-845页

作者： Xiaoyan Liu Yi Liu Junlin Liu Hantao Zhang Chaofan Shan Yinglu Guo xun gong Mengmeng Cui Xiubin Li Min Tang School of Life Sciences Jiangsu University Institute of Animal Husbandry Jiangsu Academy of Agricultural Sciences Department of Rheumatology&Immunology Affiliated Hospital of Jiangsu University Department of Neurology The Second Affiliated Hospital of Shandong First Medical University

A growing body of evidence suggests that the gut microbiota contributes to the development of neurodegenerative diseases via the microbiota-gut-brain *** a contributing factor,microbiota dysbiosis always occurs in pathological changes of neurodegenerative diseases,such as Alzheimer’s disease,Parkinson’s disease,and amyotrophic lateral ***-throughput sequencing technology has helped to reveal that the bidirectional communication between the central nervous system and the enteric nervous system is facilitated by the microbiota’s diverse microorganisms,and for both neuroimmune and neuroendocrine ***,we summarize the bioinformatics analysis and wet-biology validation for the gut metagenomics in neurodegenerative diseases,with an emphasis on multi-omics studies and the gut *** pathogen-associated signaling biomarkers for identifying brain disorders and potential therapeutic targets are also ***,we discuss the role of diet,prebiotics,probiotics,postbiotics and exercise interventions in remodeling the microbiome and reducing the symptoms of neurodegenerative diseases.

关键词： biomarker diet pattern gut microbiota gut-brain axis metagenomics mitochondrial dysfunction multi-omics neurodegenerative disease neuroinflammation probiotic

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现代北太平洋中层水研究进展综述

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地球科学 2024年第8期49卷 2914-2924页

作者：刘辉宫勋中国地质大学广州南沙地大滨海研究院广东广州511462 中国地质大学生物地质与环境地质国家重点实验室湖北武汉430074 齐鲁工业大学(山东省科学院) 山东省计算中心(国家超级计算济南中心)算力互联网与信息安全教育部重点实验室山东济南250014

北太平洋中层水是北太平洋最大的原生水体,是目前发现的北太平洋表层与底层水发生交换的唯一通道,因此认识北太平洋中层水生成和传输过程是理解北太平洋垂向水交换及其环流结构的必要一环.同时,北太平洋中层水的水体特征和环流结构在“... 详细信息

北太平洋中层水是北太平洋最大的原生水体,是目前发现的北太平洋表层与底层水发生交换的唯一通道,因此认识北太平洋中层水生成和传输过程是理解北太平洋垂向水交换及其环流结构的必要一环.同时,北太平洋中层水的水体特征和环流结构在“海—气—冰”耦合系统内显著影响全球碳循环系统和海洋生态系统,进而可能改变全球气候变暖进程.围绕北太平洋中层水的物理海洋学研究主要从20世纪70年代开始,已有研究多依赖走航断面和站点数据,少部分结合数值模拟方法.本文对已有的北太平洋中层水研究工作进行了综述,进而提出继续深化对北太平洋中层水的研究包括如下几个方面:北太平洋中层环流系统趋势和“季节性—年际—年代际”振荡的特征识别;北太平洋中层环流系统对大气环流和上层海洋过程的响应机制研究;北太平洋中层环流系统稳定性及对气候变暖的反馈机制研究.

关键词：北太平洋中层水中层环流垂向水交换海洋地质

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Hydrocarbon Generation Potential and Organic Matter Enrichment Mechanism of the Cambrian Marine Shale in the Tadong Low Uplift, Tarim Basin

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Acta Geologica Sinica(English Edition) 2024年第5期 1301-1321页

作者： MIAO Huan WANG Yanbin JIANG Zhenxue ZHAO Shihu SHANG Peng gong xun TAO Chuanqi ZHANG Yu State Key Laboratory of petroleum Resources and Engineering China University of Petroleum Unconventional Unconventional Petroleum Research Institute Research Institute China University of Petroleum College of Geoscience and Surveying Engineering China University of Mining and Technology Petroleum Exploration and Production Research Institute SINOPEC Second Gas Production Plant PetroChina Changqing Oilfield Company School of Earth and Space Sciences Peking University School of Civil Engineering Liaoning Petrochemical University

Cambrian shales in China and elsewhere contain abundant oil and gas resources. However, due to its deep burial and limited outcrop, there has been relatively little research conducted on it. The Cambrian shale of the Tadong low uplift in the Tarim Basin of western China, specifically the Xidashan–Xishanbulake Formation（Fm.） and overlying Moheershan Fm. provide a case study through the use of organic petrology, mineralogy, organic and elemental geochemistry, with the aim of analyzing and exploring the hydrocarbon generation potential（PG） and organic matter（OM） enrichment mechanisms within these shale formations. The results indicate that:（1） the Cambrian shale of the Tadong low uplift exhibits relatively dispersed OM that consists of vitrinite-like macerals and solid bitumen. These formations have a higher content of quartz and are primarily composed of silica-based lithology;（2） shale samples from the Xidashan–Xishanbulake and Moheershan formations demonstrate high total organic carbon（TOC） and low pyrolytic hydrocarbon content（S2） content. The OM is predominantly type Ⅰ and type Ⅱ kerogens, indicating a high level of maturation in the wet gas period. These shales have undergone extensive hydrocarbon generation, showing characteristics of relatively poor PG;（3） the sedimentary environments of the Xidashan–Xishanbulake and Moheershan formations in the Tadong low uplift are similar. They were deposited in warm and humid climatic conditions, in oxygen-deficient environments, with stable terrigenous inputs, high paleoproductivity, high paleosalinity, weak water-holding capacity, and no significant hydrothermal activity; and（4） the relationship between TOC and the paleoproductivity parameter（P/Ti） is most significant in the Lower Cambrian Xidashan–Xishanbulake Fm., whereas correlation with other indicators is not evident. This suggests a productivity-driven OM enrichment model, where input of landderived material was relatively small during the Middle Cambrian, and the a

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基于文本引导下的多模态医学图像分析算法

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电子学报 2024年第7期52卷 2341-2355页

作者：樊琳龚勋郑岑洋西南交通大学计算机与人工智能学院四川成都611756 可持续城市交通智能化教育部工程研究中心四川成都611756 综合交通大数据应用技术国家工程实验室四川成都611756 四川省制造业产业链协同与信息化支撑技术重点实验室四川成都611756

结合胃镜超声和白光内镜可以更准确地识别胃肠道间质瘤.但是现有的多模态方法往往仅关注于图像特征,忽略了诊断文本信息中所包含的语义信息对于精确理解和诊断医学图像的重要性.为此,本文提出一种新的基于文本引导下的多模态医学图像分... 详细信息

结合胃镜超声和白光内镜可以更准确地识别胃肠道间质瘤.但是现有的多模态方法往往仅关注于图像特征,忽略了诊断文本信息中所包含的语义信息对于精确理解和诊断医学图像的重要性.为此,本文提出一种新的基于文本引导下的多模态医学图像分析算法框架(Text-guided Multi-modal Medical image analysis framework,TMM-Net).TMM-Net使用多阶段的诊断文本来引导模型学习,以提取图像中的关键诊断信息特征,然后通过交叉模态注意力机制促进多模态特征之间的交互.值得注意的是,TMM-Net通过预测病变属性来模拟临床诊断过程,从而增强了可解释性.验证实验在两个中心包含10 025个模态数据对的数据集上进行.结果表明,该方法相比目前最优的GISTs诊断方法精度提升7.7%,同时获得了最高的(Area Under the Curve,AUC)值:0.927,其可解释性可以更好地适合临床需求.

关键词：多模态融合模型可解释性图像-文本匹配胃肠道间质瘤胃镜超声白光内镜

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面向乳腺超声分类的低尺度形态特征重校准方法

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西南交通大学学报 2024年第3期59卷 539-546,563页

作者：龚勋朱丹杨子奇罗俊西南交通大学计算机与人工智能学院四川成都611756 西南交通大学可持续城市交通智能化教育部工程研究中心四川成都611756 西南交通大学综合交通大数据应用技术国家工程实验室四川成都611756 西南交通大学四川省制造业产业链协同与信息化支撑技术重点实验室四川成都611756 四川省人民医院四川成都610072

针对乳腺超声图像具有类内差异大、类间差异小以及结节形状复杂多变等问题,提出一种形状特征重校准的乳腺超声图像算法,实现乳腺超声的自动化诊断.首先,构建端到端的网络模型,采用渐进训练方式,充分学习图像中更具辨别力的区域,获取更... 详细信息

针对乳腺超声图像具有类内差异大、类间差异小以及结节形状复杂多变等问题,提出一种形状特征重校准的乳腺超声图像算法,实现乳腺超声的自动化诊断.首先,构建端到端的网络模型,采用渐进训练方式,充分学习图像中更具辨别力的区域,获取更细粒度的特征信息;其次,提出分区打乱机制,降低网络中打乱图像时破坏结节区域所产生的噪声;然后,将模型底层提取的特征与通过掩膜图像获得的形状特征进行重校准,提出低尺度重校准损失函数;最后,构建一个包含1550张乳腺超声图像数据集LSRD(low-scale recalibration database),验证所提方法的有效性.实验结果表明:本文模型在LSRD上准确率94.3%、敏感性91.2%、特异性93.6%、ROC(receiver operator characteristic curve)与坐标围成的面积(area under curve,AUC)为0.941,均优于对比模型;在BUSI(breast ultrasound image)数据集上,相较于对比模型,其分类精度提升3.3%.

关键词：形状特征分区打乱机制低尺度重校准乳腺癌分类

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以四个“一体化”筑牢中学思政教育的根基

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教育理论与实践 2024年第17期44卷 5-6页

作者：贡建勋山西省实验中学山西太原030002

思想政治理论课是落实立德树人的关键课程。山西省实验中学思政教育建设以四个“一体化”构建了中学思政教育新范式,即提炼“一体化”主题、开发“一体化”课程、组织“一体化”教研、创建“一体化”基地,引导学生树立正确的人生观和价... 详细信息

思想政治理论课是落实立德树人的关键课程。山西省实验中学思政教育建设以四个“一体化”构建了中学思政教育新范式,即提炼“一体化”主题、开发“一体化”课程、组织“一体化”教研、创建“一体化”基地,引导学生树立正确的人生观和价值观,提升学生的道德品质和行为习惯,增强其社会责任感和创新能力,推动思政建设内涵式发展,促进学校教育高质量发展。

关键词：中学思政教育 “一体化”主题 “一体化”课程 “一体化”教研 “一体化”基地

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不同结晶度纤维素与1-丁基-3-甲基咪唑氯混合热解特性研究

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动力工程学报 2024年第2期44卷 196-202页

作者：张涛泮浩翔吕为智龚勋上海发电设备成套设计研究院有限责任公司上海200240 华中科技大学能源与动力工程学院煤燃烧国家重点实验室武汉430074

通过等体积浸湿的方法对不同结晶度的纤维素负载1-丁基-3-甲基咪唑氯([Bmim]Cl)离子液体,获得了负载离子液体的纤维素和再生纤维素样品,在固定床反应器上探究了不同结晶度纤维素负载离子液体的热解行为,并分别对其三态产物生物焦、生物... 详细信息

通过等体积浸湿的方法对不同结晶度的纤维素负载1-丁基-3-甲基咪唑氯([Bmim]Cl)离子液体,获得了负载离子液体的纤维素和再生纤维素样品,在固定床反应器上探究了不同结晶度纤维素负载离子液体的热解行为,并分别对其三态产物生物焦、生物油、生物气进行了分析。结果表明:纤维素再生过程会破坏内部晶体结构,使其无定形区域变大,脱水反应更加容易发生;热解温度为275℃时,与纤维素相比,结晶度更低的再生纤维素能够促进挥发物的生成以及抑制固体碳的生成,液体产率及固体产率分别从48.23%、48.81%变化至55.7%、37.67%,而热解温度在300~350℃的高温下却相反;负载离子液体后可以促进LGO等物质的生成,最高产率可达到16.1%,高结晶度能够促进离子液体对LGO的催化作用。

关键词：混合热解纤维素离子液体结晶度

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