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基于无人机和地面调查的典型草原“种-面积”关系

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中国环境科学 2024年第9期44卷 5169-5179页

作者：朱萨宁高吉喜万华伟尤春赫杨雪郭雨桐祝晨佳吕娜中国环境科学研究院生态研究所北京100012 生态环境部卫星环境应用中心北京100094 北京林业大学草业与草原学院北京100091

本研究以呼伦贝尔市典型草原为研究对象,通过传统地面样方调查和无人机调查,系统研究了“种-面积”关系,确定了典型草原地面与无人机调查的最小调查面积.调查结果表明:1)典型草原的物种数量与调查面积呈非线性关系,“种-面积”关系呈现... 详细信息

本研究以呼伦贝尔市典型草原为研究对象,通过传统地面样方调查和无人机调查,系统研究了“种-面积”关系,确定了典型草原地面与无人机调查的最小调查面积.调查结果表明:1)典型草原的物种数量与调查面积呈非线性关系,“种-面积”关系呈现为S=aln(bA+1).基于组合样方法,至少要包括8个1m^(2)小样方,才能达到涵盖80%物种的目标,基于巢式样法,需要的最小调查面积为8.63m^(2);2)针对典型草原,无人机调查的平均物种发现率为传统地面调查方法的81.7%,无人机可作为地面调查的辅助手段,提高调查的效率;3)在典型草原物种监测中,可选取1个或2个组合样方,并使用无人机进行4~5次随机拍摄作为补充,此时可发现典型草原物种总数的84.7%~88.3%.该方法相对传统的3~5次重复样方调查,代表性更高,调查效率更高.

关键词： “种-面积”关系无人机地面调查典型草原

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台港澳及海外华人的比较文学及其诗学传统

学术研究 2024年第5期 163-170页

作者：纪建勋朱云上海师范大学都市文化研究中心上海师范大学人文学院上海200234 南京农业大学外国语学院江苏南京210095

台港澳及海外华人的比较文学在我国比较文学史上具有特别的意义。建构严谨完整的比较文学史,梳理与考察对应的四种比较文学及其诗学传统,需要把中国内地作为比较的基点,聚焦台港澳地区比较文学的学科建设与发展、代表性研究成果及研究特... 详细信息

台港澳及海外华人的比较文学在我国比较文学史上具有特别的意义。建构严谨完整的比较文学史,梳理与考察对应的四种比较文学及其诗学传统,需要把中国内地作为比较的基点,聚焦台港澳地区比较文学的学科建设与发展、代表性研究成果及研究特点;同时,还要把海外华人的比较文学作为第二个比较的基点,围绕中西比较诗学理论体系、中国抒情传统的开创和研究,以及跨学科视野下的中国文学研究三个层面,梳理海外华人比较文学的成就及特色。在厘清以上两方面脉络的基础上,重点辨析台港澳及海外华人比较文学的诗学传统,尤其是“比较文学的中国学派”“文学比较之于比较文学”“中国抒情传统之于跨文化研究”等重要议题对于国际比较文学发展第三阶段的方法论意义。

关键词：台港澳海外华人比较文学跨文化研究诗学传统

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“抱团出海”:战略联盟与企业对外直接投资

金融论坛 2024年第7期 3-13,25页

作者：王天韵王稳华祝继高对外经济贸易大学国际商学院云南财经大学会计学院昆明650221

以2009-2022年中国沪深A股上市公司为研究对象,探究企业如何利用战略联盟来驱动对外直接投资。研究发现,战略联盟与企业对外直接投资呈显著的正相关关系,表明战略联盟这一“抱团”合作方式有助于企业走好“出海”之路。路径检验发现,企... 详细信息

以2009-2022年中国沪深A股上市公司为研究对象,探究企业如何利用战略联盟来驱动对外直接投资。研究发现,战略联盟与企业对外直接投资呈显著的正相关关系,表明战略联盟这一“抱团”合作方式有助于企业走好“出海”之路。路径检验发现,企业参与战略联盟的对外直接投资促进效应通过提高企业生产效率和增强企业创新能力来实现。进一步地,相比于其他类型的战略联盟,股权式战略联盟以及联盟对象为政府部门、银行和海外企业更能有效促进企业对外直接投资。

关键词：战略联盟对外直接投资生产效率创新能力

Dcalycinumines A-E,Alkaloids with Cytotoxic Activities of Nasopharyngeal Carcinoma Cells from Daphniphyllum calycinum

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Chinese Journal of Chemistry 2024年第1期42卷 35-42页

作者： Qing Tang Xiao-Yong Dai Qiang Lin Zhi-Peng Ling Yi-Kun Hao Tian-Xi zhu ji-Hui Zhang Yi-Bo Hou Yao-Lan Li Lai-Qiang huang jing-Hao Wang Guo-Cai Wang Yu-Bo Zhang Guangdong Clinical Translational Centerfor Targeted Drug Department of PharmacologySchoolof MedicineJinan University GuangzhouGuangdong 510632China Institute of Traditional Chinese Medicine&Natural Products Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs ResearchCollegeof PharmacyJinan UniversityGuangzhouGuangdong511443China Institute of Biopharmaceutical and Health Engineering Shenzhen Key Laboratory of Gene and Antibody TherapyState Key Laboratory of Chemical OncogenomicsShenzhen International Graduate SchoolTsinghua UniversityShenzhenGuangdong 518055China The Guangzhou Key Laboratoryof Basic and Translational Research on Chronic Disease Department of PharmacyThe First Affiliated HospitalJinan UniversityGuangzhouGuangdong 510630China

Fivenovel Daphniphyllum alkaloids,named dcalycinumines A-E(1-4,6),andeight previously described Daphniphyllum alkaloids(5,7-13)were isolated from Daphniphyllum *** 1 is the first Daphniphyllum alkaloid possessing a highly rearranged 6/6/6/7/5/6 hexacyclic architecture with a unique 3-methyl-1-azabicyclo[4,4,0]decane ring *** 2 represents a rare diamino Daphniphyllum alkaloid with an unprecedented 6/5/5/6/6/5 carbon skeleton featuring a unique 1-aza-6-azaspiro[4,5]decane unit,whereas 3 also represents a rare diamino Daphniphyllum alkaloid as a possible precursor of *** 4 is the second example of c-22-nor yuzurimine-type *** structures and absolute configurations were elucidated by HRESIMS,NMR spectroscopic analyses,EcD calculations,and single-crystal X-ray ***,compound 1 showed remarkable antitumor activities,which could inhibit the proliferation,migration and invasion of nasopharyngeal carcinoma cells,and promoted nasopharyngeal carcinoma cells apoptosis.

关键词： Daphniphyllum calycinum Natural products Daphniphyllum alkaloid Structural elucidation Biological activity Apoptosis Nasopharyngealcarcinoma

Prediction of sepsis within 24 hours at the triage stage in emergency departments using machine learning

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World Journal of Emergency Medicine 2024年第5期15卷 379-385页

作者： jingyuan Xie jiandong Gao Mutian Yang Ting Zhang Yecheng Liu Yutong Chen Zetong Liu Qimin Mei Zhimao Li huadong zhu ji Wu Department of Electronic Engineering Tsinghua UniversityBeijing 100084China Center for Big Data and Clinical Research Institute for Precision MedicineTsinghua UniversityBeijing 100084China Institute of Medical technology Peking University Health Science CenterBeijing 100091China Emergency Department State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College HospitalChinese Academy of Medical Science and Peking Union Medical CollegeBeijing 100005China Department of Health Care Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100005China

BACKGROUND:Sepsis is one of the main causes of mortality in intensive care units(ICUs).Early prediction is critical for reducing *** approximately 36%of sepsis occur within 24 h after emergency department(ED)admission in Medical Information Mart for Intensive Care(MIMIC-IV),a prediction system for the ED triage stage would be *** methods such as the quick Sequential Organ Failure Assessment(qSOFA)are more suitable for screening than for prediction in the ED,and we aimed to fi nd a light-weight,convenient prediction method through machine ***:We accessed the MIMIC-IV for sepsis patient data in the *** dataset comprised demographic information,vital signs,and synthetic *** Gradient Boosting(XGBoost)was used to predict the risk of developing sepsis within 24 h after ED ***,SHapley Additive exPlanations(SHAP)was employed to provide a comprehensive interpretation of the model's *** percent of the patients were randomly selected as the testing set,while the remaining patients were used for training with 10-fold ***:For 10-fold cross-validation on 14,957 samples,we reached an accuracy of 84.1%±0.3%and an area under the receiver operating characteristic(ROC)curve of 0.92±*** model achieved similar performance on the testing set of 1,662 *** values showed that the fi ve most important features were acuity,arrival transportation,age,shock index,and respiratory ***:Machine learning models such as XGBoost may be used for sepsis prediction using only a small amount of data conveniently collected in the ED triage *** may help reduce workload in the ED and warn medical workers against the risk of sepsis in advance.

关键词： Sepsis Machine learning Emergency department Triage Informatics

纳洛酮胸腰筋膜平面阻滞在TLIF术后镇痛效果

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中国矫形外科杂志 2024年第11期32卷 1038-1041页

作者：崔彦虎柳钧朱瑞冀春吉甘肃医学院附属医院麻醉科甘肃平凉744000

[目的]探讨小剂量纳洛酮胸腰筋膜平面(thoracolumbar interfascial plane,TLIP)阻滞在经椎间孔腰椎椎体间融合术(transforaminal lumbar interbody fusion,TLIF)术后的镇痛效果。[方法]2020年5月—2023年5月腰椎退行性疾病在全麻下行TLIF的82例患者纳入本研究。根据术前医患沟通结果,40例采用常规TLIP阻滞(常规组),另外42例采用小剂量纳洛酮TLIP阻滞(纳洛酮组),比较两组围手术期临床与镇痛资料。[结果]两组手术时间、术中出血量和不良反应发生率差异无统计学意义(P>0.05)。两组术后2~48 h VAS评分均先上升后下降,但纳洛酮组6、24、48 h的VAS评分均显著低于常规组(P<0.05)。此外,纳洛酮组在首次补救镇痛[(10.5±1.8)h vs(6.4±1.6)h,P<0.001]、PCIA按压次数[(6.4±0.9)次vs(8.1±1.5)次,P<0.001]、舒芬太尼剂量[(72.6±14.6)μg vs(84.5±17.6)μg,P=0.001]、额外镇痛次数[(1.2±0.4)次vs(1.8±0.2)次,P<0.001]均显著优于常规组。[结论]小剂量纳洛酮TLIP阻滞能够有效缓解TLIF术后早期疼痛症状,减少术后镇痛药物使用量及次数。

关键词：经椎间孔腰椎椎体间融合术术后镇痛小剂量纳洛酮胸腰筋膜平面阻滞

Causal temporal graph attention network for fault diagnosis of chemical processes

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Chinese Journal of Chemical Engineering 2024年第6期70卷 20-32页

作者： jiaojiao Luo Zhehao jin Heping jin Qian Li Xu ji Yiyang Dai School of Chemical Engineering Sichuan UniversityChengdu 610065China China Three Gorges Corporation Beijing 100038China

Fault detection and diagnosis(FDD)plays a significant role in ensuring the safety and stability of chemical *** the development of artificial intelligence(AI)and big data technologies,data-driven approaches with excellent performance are widely used for FDD in chemical ***,improved predictive accuracy has often been achieved through increased model complexity,which turns models into black-box methods and causes uncertainty regarding their *** this study,a causal temporal graph attention network(CTGAN)is proposed for fault diagnosis of chemical processes.A chemical causal graph is built by causal inference to represent the propagation path of *** attention mechanism and chemical causal graph were combined to help us notice the key variables relating to fault *** in the tennessee Eastman(te)process and the green ammonia(GA)process showed that CTGAN achieved high performance and good explainability.

关键词： Chemical processes Safety Fault diagnosis Causal discovery Attention mechanism Explainability

Non-Hermitian CHSH^(*)Game with a Single Trapped-Ion Qubit

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Chinese Physics Letters 2024年第6期41卷 1-10页

作者：宋潇刘腾边纪陆鹏飞刘泱朱峰罗乐 School of Physics and Astronomy Sun Yat-sen UniversityZhuhai 519082China Shenzhen Research Institute of Sun Yat-Sen University Shenzhen 518057China Quantum Science Center of Guangdong-HongKong-Macao Greater Bay Area Shenzhen 518048China Guangdong Provincial Key Laboratory of Quantum Metrology and Sensing Zhuhai 519082China

The Clauser-Horne-Shimony-Holt(CHSH)game provides a captivating illustration of the advantages of quantum strategies over classical *** a recent study,a variant of the CHSH game leveraging a single qubit system,referred to as the CHSH^(*)game,has been *** demonstrate that this mapping relationship between these two games remains effective even for a non-unitary *** we delve into the breach of Tsirelson’s bound in a non-Hermitian system,predicting changes in the upper and lower bounds of the player’s winning probability when employing quantum strategies in a single dissipative qubit *** experimentally explore the impact of the CHSH^(*)game on the player’s winning probability in a single trapped-ion dissipative system,demonstrating a violation of Tsirelson’s bound under the influence of parity-time(PT)*** results contribute to a deeper understanding of the influence of non-Hermitian systems on quantum games and the behavior of quantum systems under PT symmetry,which is crucial for designing more robust and efficient quantum protocols.

关键词： quantum system dissipative

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中国国家治理的伦理意蕴及善治实践理路

中南民族大学学报（人文社会科学版） 2024年第9期44卷 120-127,186页

作者：邹吉忠朱曦中央民族大学哲学与宗教学学院北京100081

“家国一体”国家文明形态与文化认识理路,决定了中国与其他国家在治理理念与治理模式方面皆存在差异。在中国,“家”的本体论存在构成了现代中国人伦关系的基本价值规范和形成基础。中国国家治理在中西文明交流与对话中显现出独特伦理... 详细信息

“家国一体”国家文明形态与文化认识理路,决定了中国与其他国家在治理理念与治理模式方面皆存在差异。在中国,“家”的本体论存在构成了现代中国人伦关系的基本价值规范和形成基础。中国国家治理在中西文明交流与对话中显现出独特伦理品格,其品格本质上是马克思“真正共同体”意义上的善。中国国家治理善治的实现,必须要深入中国的社会历史现实,以观照中国人民的日常生活为逻辑起点,借助传统人伦关系的现代化转型,通过道德赋能使得伦理道德成为国家治理措施之外的有益补充。

关键词：中国国家治理家国一体真正共同体善治道德赋能

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