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基于临床-MRI形态学指标预测胎盘植入性疾病不良临床结局模型的构建与验证

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临床放射学杂志 2024年第6期43卷 977-982页

作者：曾浩扬李俊凯刘伟豪杨焕程杨忠袁阳光吴翔梅航汝万璐刘翰林深圳大学第三附属医院(深圳市罗湖医院集团)放射科 518000 深圳大学第三附属医院(深圳市罗湖医院集团)泌尿外科 518000 汕头大学医学院罗湖临床学院(深圳市罗湖医院集团) 深圳市人民医院(暨南大学第二临床医学院)放射科深圳市人民医院(暨南大学第二临床医学院)妇产科

目的探讨基于临床-MRI形态学指标构建的模型能否为胎盘植入性(placenta accreta spectrum, PAS)疾病的不良临床结局提供稳健的预测。方法回顾性分析来自两个医疗中心的125例PAS孕妇的资料,将其分为训练集(内部数据集,85例)和外部测试... 详细信息

目的探讨基于临床-MRI形态学指标构建的模型能否为胎盘植入性(placenta accreta spectrum, PAS)疾病的不良临床结局提供稳健的预测。方法回顾性分析来自两个医疗中心的125例PAS孕妇的资料,将其分为训练集(内部数据集,85例)和外部测试集(外部数据集,40例)。PAS不良临床结局定义为术中出血超过1500 ml和/或行子宫切除术。本研究提取5个MRI形态学指标[宫颈管长度、子宫下段膨隆比值、胎盘内T2(T2WI)低信号带面积、胎盘内增粗血管直径和面积]以及6个PAS临床高危因素(年龄、孕周、孕次、产次、剖宫术次数和清宫术次数)作为模型输入,构建了一个以XGBoost为算法基础的PAS不良临床结局预测模型(低风险vs.高风险)。此外,还采用五折交叉验证和多中心外部测试的策略验证模型的稳定性和泛化性能。最后,计算单一特征的Shapley Additive exPlanation(SHAP)量探索每个特征对模型决策的贡献。结果对于PAS不良临床结局(低风险vs.高风险)预测模型,五折交叉验证的ROC曲线下面积(AUROC)分别为0.94、0.86、0.87、0.93和0.92,准确率分别为92%、81%、81%、85%和85%。最优模型的训练集和测试集AUROC分别为0.94和0.85,均落在95%置信区间内,其准确率分别为92%和78%,敏感度分别为93%和80%,特异度分别为92%和80%。结论基于临床-MRI形态学指标构建的PAS孕妇不良临床结局预测模型可为术前评估PAS不良临床结局发生风险提供一个强有力的依据。

关键词：胎盘植入性疾病磁共振成像不良临床结局

Functional microfluidics:theory,microfabrication,and applications

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International Journal of Extreme Manufacturing 2024年第3期6卷 140-173页

作者： Mingzhu Xie Ziheng Zhan Yinfeng li junkai Zhao Ce Zhang Zhaolong Wang Zuankai Wang Interdisciplinary Research Center of Low-carbon Technology and Equipment College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082People’s Republic of China Energy Research Institute of Shandong Academy of Sciences Qilu University of Technology(Shandong Academy of Sciences)Jinan 250014People’s Republic of China Qian Xuesen Laboratory of Space Technology China Academy of Space Technology(CAST)Beijing 100094People’s Republic of China Department of Mechanical Engineering Hong Kong Polytechnic UniversityHong Kong Special Administrative Region of China 999077People’s Republic of China

Microfluidic devices are composed of microchannels with a diameter ranging from ten to a few hundred ***,quite a small(10-9–10-18l)amount of liquid can be manipulated by such a precise *** the past three decades,significant progress in materials science,microfabrication,and various applications has boosted the development of promising functional microfluidic *** this review,the recent progress on novel microfluidic devices with various functions and applications is ***,the theory and numerical methods for studying the performance of microfluidic devices are briefly ***,materials and fabrication methods of functional microfluidic devices are ***,the recent significant advances in applications of microfluidic devices are highlighted,including heat sinks,clean water production,chemical reactions,sensors,biomedicine,capillaric circuits,wearable electronic devices,and ***,perspectives on the challenges and future developments of functional microfluidic devices are *** review aims to inspire researchers from various fields engineering,materials,chemistry,mathematics,physics,and more—to collaborate and drive forward the development and applications of functional microfluidic devices,specifically for achieving carbon neutrality.

关键词： capillary theory functional devices functional microfluidics

Towards Ultrahigh Capacity and High Cycling Stability lithium-Conducting Polymer Batteries by In Situ Construction of Nanostructured Porous Cathodes

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CCS Chemistry 2024年第3期6卷 749-760页

作者： junkai Yang Jixing Yang Yunhua Xu Yuesheng li School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin 300350

Conducting polymers(CPs)have long been studied as cathode materials for lithium-ion batteries,but the low doping level(maximum:30–50%or even lower)and poor cycling stability limit their ***,we have developed a method of nanoporeconfined in situ electropolymerization to prepare nanostructured polythiophene-type porous cathodes,achieving significantly improved doping availability and long cycle *** was verified that the nanosized polymer formed in situ and loose porous structure are conducive to the doping reaction and maintain high electrochemical *** constructed thieno[3,2-b]thiophene(TtTP)/active carbon cathode delivers an ultrahigh reversible capacity of 309.2 mAh g^(−1)(doping level up to 80.9%)along with an ultrahigh energy density of 1252.3 Wh Kg^(−1),and an ultrahigh rate capability(172.4 mAh g^(−1) at 30 A g^(−1)),which far exceed all the CPs and even all the p-type organic cathode materials ***,an excellent long cycle life of 2000 cycles at 5 A g^(−1) is also revealed,which is a new record for CPs-based cathode materials in nonaqueous lithium-ion *** method provides an effective strategy to improve the doping level and cycling stability of CP-based cathode materials.

关键词： organic cathode materials conducting polymers lithium-ion batteries porous carbon in situ electropolymerization

Data Recovery Based on Intelligent Pattern Matching

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China Communications 2010年第6期7卷 107-111页

作者： Yi junkai Tang Shuo li Hui Beijing University of Chemical Technology Beijing 10029 P. R. China

To solve the problem of data recovery on free disk sectors, an approach of data recovering based on intelligent pattern matching is proposed in this paper. Different from the methods based on the file directory, this approach utilizes the consistency among the data on the disk. A feature pattern library is established based on different types of files according to the internal constructions of text. Data on sectors will be classified automatically by data clustering and evaluating. When the conflict happens on data classification, the digestion will be initiated by adopting context pattern. Based on this approach, the paper achieved the data recovery system aiming at pattern matching of txt, word and PDF files. Raw and formatting recovery tests proved that the system works well.

关键词：模式匹配数据恢复智能磁盘扇区文件目录内部结构背景图案 Word

N-(苯基)噻唑酰胺类衍生物的合成及杀菌活性

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合成化学 2024年第2期32卷 150-157页

作者：张勇时锦超胡勇廖灿王美美朱祥余林花李俊凯长江大学农学院湖北荆州434025 长江大学农药研究所湖北荆州434025 贵州大学绿色农药与农业生物工程国家重点实验室培育基地/教育部重点实验室贵州贵阳550025

为了寻求以天然产物为先导结构的绿色、高效新型杀菌剂,以苯甲腈、3-溴丙酮酸乙酯和不同取代苯胺为原料,通过活性亚结构拼接合成了12个N-(苯基)噻唑酰胺类衍生物(6a~6l)。产物结构均经过^(1)H NMR、^(13)C NMR和HR-MS(MSI)表征。杀菌活... 详细信息

为了寻求以天然产物为先导结构的绿色、高效新型杀菌剂,以苯甲腈、3-溴丙酮酸乙酯和不同取代苯胺为原料,通过活性亚结构拼接合成了12个N-(苯基)噻唑酰胺类衍生物(6a~6l)。产物结构均经过^(1)H NMR、^(13)C NMR和HR-MS(MSI)表征。杀菌活性结果显示:该类化合物对水稻纹枯病菌、白芨白绢病菌和水稻稻瘟病菌有良好的抑制作用。化合物6c和6l对水稻稻瘟病菌的EC_(50)值分别为0.015 mmol/L和0.020 mmol/L,优于对照药剂申嗪霉素(EC_(50)=0.031 mmol/L),其作为以天然产物为先导结构的新型杀菌剂,值得进一步探索研究。

关键词：噻唑酰胺合成杀菌活性 Thiasporine A

Morphological and Molecular Data Revealed One New Species of the Short-legged Toads Brachytarsophrys Tian and Hu,1983(Anura,Megophryidae)from Yunnan,China

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Asian Herpetological Research 2024年第1期15卷 22-30页

作者： Yanhong HE Renda AI junkai HUANG Xianqi li Xiaolong liU Junlin LAN Jinmin CHEN Zhiyong YUAN Key Laboratory of Freshwater Fish Reproduction and Development(Ministry of Education) School of Life SciencesSouthwest UniversityChongqing 400715China Key Laboratory for Conserving Wildlife with Small Populations in Yunnan Southwest Forestry UniversityKunming 650224YunnanChina Guangxi Key Laboratory of Rare and Endangered Animal Ecology Guangxi Normal UniversityGuilin 541004GuangxiChina Wenshan National Nature Reserve of Yunnan Province Wenshan 663099YunnanChina Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources College of Life SciencesAnhui Normal UniversityWuhu 241000AnhuiChina

A new species of the genus Brachytarsophrys,named Brachytarsophrys wenshanensis ***.,has been identified in southeastern Yunnan,*** new species can be readily distinguished from other known congeners by both morphological criterion and molecular analysis of three mitochondrial gene segments:16S,COI,and *** classification is based on the following morphological characters:(1)medium body size(SVL 83.8–85.1 mm in two adult males);(2)enormous head,with head width nearly 1.2 times the length;(3)tongue pyriform,feebly notched;(4)non-meeting heels;(5)male lacking nuptial pad;(6)tibiotarsal articulation reaching angle of mouth when hindlimbs are extended forward alongside the body;(7)absence of outer metatarsal tubercle,inner metatarsal tubercle elliptic and approximately equal to first toe;(8)rudimentary toe webbing,webbing formula:Ⅰ(2–)–(2^(++))Ⅱ(2^(–))–(3^(++))Ⅲ(2^(½))–(4)Ⅳ(4^(+))–(2^(⅔))V;(9)lateral fringes narrow;(10)dermal ridge or glandular fold on dorsum absent;(11)pectoral glands distinct and irregular,femoral gland *** work increases the number of species within the genus Brachytarsophrys to 9.

关键词： amphibians molecular phylogeny species diversity taxonomy

Ru-Ni alloy nanosheets as tandem catalysts for electrochemical reduction of nitrate to ammonia

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Nano Research 2024年第6期17卷 4815-4824页

作者： Xingchao You Jiawei Xu Zechao Zhuang junkai Xia Suwen Wang Haiyan Wei Yongfu li Yanjiang Cai Hai Xiang Bing Yu State Key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityHangzhou 311300China Ecological-Environment&Health College(EEHC) Zhejiang A&F UniversityHangzhou 311300China Jiangsu Key Laboratory of Numerical Simulation of Large Scale Complex Systems and School of Chemistry and Materials Science Nanjing Normal UniversityNanjing 210023China Department of Chemistry Tsinghua UniversityBeijing 100084China Department of Chemical Engineering Columbia UniversityNew YorkNY 10027USA

Developing electrocatalysts that exhibit both high activity and ammonia selectivity for nitrate reduction is a significant and demanding challenge,primarily due to the complex nature of the multiple-electron reduction process *** encouraging approach involves coupling highly active precious metals with transition metals to enhance catalytic performance through ***,we report a ruthenium-nickel alloy catalyst with nanosheets(Ru-Ni NSs)structure that achieves a remarkable ammonia Faradaic efficiency of approximately 95.93%,alongside a yield rate of up to 6.11 g·h^(−1)·cm^(−2).Moreover,the prepared Ru-Ni NSs exhibit exceptional stability during continuous nitrate reduction in a flow reactor for 100 h,maintaining a Faradaic efficiency of approximately 90%and an ammonia yield of 37.4 mg·L^(−1)·h^(−1)using 0.05 M nitrate alkaline *** studies reveal that the catalytic process follows a two-step pathway,in which HONO serves as a migration *** presence of a partially oxidized Ru(002)surface enhances the adsorption of nitrate and facilitates the release of the migration intermediate by adjusting the strength of the electrostatic and covalent interactions between the adsorbate and the surface,*** the other hand,the Ni(111)surface promotes the utilization of the migration intermediate and requires less energy for NH_(3)*** tandem process contributes to a high catalytic activity of Ru-Ni NSs towards nitrate reduction.

关键词： alloy catalyst nitrate reduction ammonia synthesis Faradaic efficiency

Revealing the key role of non-solvating diluents for fast-charging and low temperature li-ion batteries

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Journal of Energy Chemistry 2024年第7期94卷 171-180页

作者： Yuping Zhang Siyin li junkai Shi Jiawei Lai Ziyue Zhuang Jingwen liu Wenming Yang liang Ma Yue-Peng Cai Jijian Xu Qifeng Zheng School of Chemistry Guangzhou Key Laboratory of Materials for Energy Conversion and StorageSouth China Normal UniversityGuangzhou 510006GuangdongChina Guangzhou Foreign Language School Guangzhou 511455GuangdongChina Department of Chemistry City University of Hong KongHong Kong 999077China

Fast-charging and low temperature operation are of vital importance for the further development of lithium-ion batteries(liBs),which is hindered by the utilization of conventional carbonate-based electrolytes due to their slow kinetics,narrow operating temperature and voltage ***,an acetonitrile(AN)-based localized high-concentration electrolyte(LHCE)is proposed to retain liquid state and high ionic conductivity at ultra-low temperatures while possessing high oxidation *** originally reveal the excellent thermal shielding effect of non-solvating diluent to prevent the aggregation of li^(+) solvates as temperature drops,maintaining the merits of fast li transport and facile desolvation as at room temperature,which bestows the graphite electrode with remarkable low temperature performance(264 mA h g^(-1) at-20 C).Remarkably,an extremely high capacity retention of 97%is achieved for high-voltage high-energy graphite||NCM batteries after 250 cycles at-20 C,and a high capacity of 110 mA h g^(-1)(71%of its room-temperature capacity)is retained at-30°*** study unveils the key role of the non-solvating diluents and provides instructive guidance in designing electrolytes towards fast-charging and low temperature liBs.

关键词： li-ion battery Fast-charging Low temperature Non-solvating diluent Shielding effect

构建面向未来产业的创新生态系统:结构框架与实现路径

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中国科学院院刊 2023年第6期38卷 887-894页

作者：李军凯高菲龚轶北京市科学技术研究院北京100089

前沿基础知识与共性关键技术持续涌现与突破,未来产业对创新生态系统的结构、功能与实现路径等多个维度提出新的理论与实践挑战。综合自然生态系统和创新系统等相关理论,基于未来产业特征与演化规律,构建由前沿知识创造群落、应用场景... 详细信息

前沿基础知识与共性关键技术持续涌现与突破,未来产业对创新生态系统的结构、功能与实现路径等多个维度提出新的理论与实践挑战。综合自然生态系统和创新系统等相关理论,基于未来产业特征与演化规律,构建由前沿知识创造群落、应用场景转化群落和产业价值实现群落组成的未来产业创新生态系结构框架,有为政府与企业家精神是未来产业创新生态系统中重要主体与关键要素。培育和发展未来产业的政策方向可考虑创新要素识别、创新主体协同和创新环境优化等方面。

关键词：未来产业创新生态系统有为政府企业家精神