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Chinese Journal of Chemistry 2024年第14期42卷 1571-1581页

作者： Yongjie Chen Yanwei Wang Jun Nong dan yuan Yingming Yao Key Laboratory of Organic Synthesis of Jiangsu Province College of ChemistryChemical Engineering and Materials ScienceDushu Lake CampusSoochow UniversitySuzhouJiangsu215123 China

Eight zwitterionic rare earth metal complexes stabilized by amino-bridged tris(phenolato)ligands bearing quaternary ammonium side-arms were synthesized and *** complexes were used as single-component catalysts for the cycloaddition of CO_(2)and epoxides,and their catalytic activities are obviously higher than those of their binary *** studies revealed that the halide anions(Cl^(–),Br^(–),I^(–))and the metal complexes influenced the catalytic activity,and the lanthanum complex bearing iodide anion showed the highest catalytic activity for this addition reaction.A variety of mono-substituted epoxides were converted to cyclic carbonates in good to excellent yields(55%—99%)with high selectivity(>99%)at 30℃and 1 bar CO_(2),whereas internal epoxides required higher both reaction temperatures(60—120℃)and catalyst loading(2 mol%)for high *** catalyst was recyclable for four times without noticeable loss of catalytic *** on the results of kinetic studies and in℃situ IR reactions,a plausible reaction mechanism was proposed.

关键词： Bifunctional catalyst Carbon dioxide Cyclic carbonate Rare-earth metal Tris(phenolato)ligand Insertion Cycloaddition C1 building blocks

Study on the occurrence and influencing factors of gastrointestinal symptoms in hemodialysis patients with uremia

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World Journal of Gastrointestinal Surgery 2024年第7期16卷 2157-2166页

作者： dan yuan Xiao-Qi Wang Feng Shao Jing-Jing Zhou Zhong-Xin Li Department of Nephrology Beijing Luhe Hospital Affiliated to Capital Medical UniversityBeijing 101100China

BACKGROUND Gastrointestinal symptoms are common in patients with uremia undergoing hemodialysis,and these symptoms seriously affect patients'*** To assess the occurrence and factors influencing gastrointestinal symptoms in patients with uremia undergoing *** We retrospectively selected 98 patients with uremia who underwent regular hemo-dialysis treatment in the blood purification center of our hospital from December 2022 to December *** gastrointestinal symptoms and scores of each dimension were evaluated using the Gastrointestinal Symptom Grading Scale(GSRS).Patients were divided into gastrointestinal symptoms and no gastrointestinal symptom groups according to whether they had gastrointestinal *** factors that may affect gastrointestinal symptoms were identified by single-factor *** logistic regression analysis was performed to identify independent risk factors for gastrointestinal *** Gastrointestinal symptoms included indigestion,constipation,reflux,diarrhea,abdominal pain,and eating disorders,and the total average GSRS score was 1.35±*** study showed that age,number of tablets,dialysis time,glucocorticoid,parathyroid hormone(PTH),combined diabetes mellitus and C-reactive protein(CRP)were independent risk factors for gastrointestinal symptoms in patients with uremia undergoing hemodialysis,whereas body mass index(BMI),hemoglobin(Hb),and urea clearance index were independent protective factors(P<0.05).CONCLUSION Gastrointestinal symptoms are mostly mild in patients with uremia undergoing hemodialysis,most commonly including dyspepsia,eating disorders,and gastroesophageal *** independent influencing factors mainly include the BMI,age,number of pills taken,dialysis time,urea clearance index,Hb,use of glucocorticoids,and thyroid hormone ***,CRP,and diabetes are clinically related factors influencing the occurrence of gastrointestinal symptoms,and targeted prevention can be perform

关键词： Uremic hemodialysis Gastrointestinal symptoms Influencing factors Blood pressure dialysis Chronic renal failure

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跨学科教研共同体的样态及其建构

课程．教材．教法 2024年第8期44卷 129-133页

作者：袁丹重庆第二师范学院教师教育学院重庆400065 西部儿童脑与认知科学研究院

《义务教育课程方案(2022年版)》强调,“设立跨学科主题学习活动,加强学科间相互关联,带动课程综合化实施”^([1]前言4),“原则上,各门课程用不少于10%的课时设计跨学科主题学习”^([1]11)。与此相呼应,各学科课程标准对本门课程中的“... 详细信息

《义务教育课程方案(2022年版)》强调,“设立跨学科主题学习活动,加强学科间相互关联,带动课程综合化实施”^([1]前言4),“原则上,各门课程用不少于10%的课时设计跨学科主题学习”^([1]11)。与此相呼应,各学科课程标准对本门课程中的“跨学科”内容与方式都提出了崭新的要求,期待通过打破学科壁垒,聚焦不同的主题,实现学科之间的纵横联通,在概念、思维及价值观等方面相互回应与融合,培养学生的核心素养,实现学科协同育人。然而,在基础教育领域以分科教学为主的当下,学科教师是课程实施的主体.

关键词：课程综合化义务教育课程分科教学协同育人核心素养基础教育领域学科课程标准主题学习

Risk factors and predictive model of cerebral edema after road traffic accidents-related traumatic brain injury

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Chinese Journal of Traumatology 2024年第3期27卷 153-162页

作者： Di-You Chen Peng-Fei Wu Xi-Yan Zhu Wen-Bing Zhao Shi-Feng Shao Jing-Ru Xie dan-Feng yuan Liang Zhang Kui Li Shu-Nan Wang Hui Zhao Institute for Traffic Medicine Daping HospitalArmy Medical UniversityChongqing400042China Department of Radiology Daping HospitalArmy Medical UniversityChongqing400042China Chongqing Key Laboratory of Traffic Injury and Vehicle Ergonomics Chongqing400042China Wound Trauma Medical Center State Key Laboratory of TraumaBurns and Combined InjuryInstitute of Surgery ResearchDaping HospitalArmy Medical UniversityChongqing.400042China

Purpose:Cerebral edema(CE)is the main secondary injury following traumatic brain injury(TBI)caused by road traffic accidents(RTAs).It is challenging to be predicted *** this study,we aimed to develop a prediction model for CE by identifying its risk factors and comparing the timing of edema occurrence in TBI patients with varying levels of ***:This case-control study included 218 patients with TBI caused by *** cohort was divided into CE and non-CE groups,according to CT results within 7 *** data,imaging data,and clinical data were collected and *** variables that follow normal distribution were presented as mean±standard deviation,those that do not follow normal distribution were presented as median(Q1,Q3).Categorical variables were expressed as *** Chi-square test and logistic regression analysis were used to identify risk factors for *** curve fitting was performed to predict the time to secondary CE in TBI patients with different levels of *** efficacy of the model was evaluated using the receiver operator characteristic ***:According to the study,almost half(47.3%)of the patients were found to have *** risk factors associated with CE were bilateral frontal lobe contusion,unilateral frontal lobe contusion,cerebral contusion,subarachnoid hemorrhage,and abbreviated injury scale(AIS).The odds ratio values for these factors were 7.27(95%confidence interval(CI):2.08-25.42,p=0.002),2.85(95%CI:1.11-7.31,p=0.030),2.62(95%CI:1.12-6.13,p=0.027),2.44(95%CI:1.25-4.76,p=0.009),and 1.5(95%CI:1.10-2.04,p=0.009),*** also observed that patients with mild/moderate TBI(AIS≤3)had a 50%probability of developing CE 19.7 h after injury(χ^(2)=13.82,adjusted R2=0.51),while patients with severe TBI(AIS>3)developed CE after 12.5 h(χ^(2)=18.48,adjusted R2=0.54).Finally,we conducted a receiver operator characteristic curve analysis of CE time,which showed an area under the curve of 0

关键词： Road traffic accident Traumatic brain injury Cerebral edema Risk factors Time window

新高考背景下学生科目选择动机对专业满意度影响机制研究

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中国高教研究 2024年第2期 40-46页

作者：袁旦方萌萌浙江工业大学公共管理学院浙江杭州310023 浙江省舆情研究中心浙江杭州310023 浙江工业大学健行书院浙江杭州310023 浙江工业大学教育科学与技术学院浙江杭州310023

新高考改革强调“选择性”教育理念,其直接体现就是取消文理分科、实行科目选考制。将学生科目选择动机分为兴趣型、策略型两种,尝试构建科目选择动机与学生进入大学后的专业承诺、专业满意度之间的关系模型,考察两种动机对专业满意度... 详细信息

新高考改革强调“选择性”教育理念,其直接体现就是取消文理分科、实行科目选考制。将学生科目选择动机分为兴趣型、策略型两种,尝试构建科目选择动机与学生进入大学后的专业承诺、专业满意度之间的关系模型,考察两种动机对专业满意度的直接影响以及专业承诺在动机与满意度之间的中介作用。通过对浙江省高考生源的1273份调查样本进行实证分析发现:学生选科的兴趣型动机要高于策略型动机,兴趣型动机在性别、父亲学历上存在显著差异;两种动机均会对专业满意度产生显著正向影响,且兴趣型动机影响更强;专业承诺在兴趣型动机影响专业满意度时具有部分中介作用,在策略型动机影响专业满意度时则具有完全中介作用,且在两种动机各自影响路径中,情感承诺的中介作用比经济承诺更大。研究表明,学生按兴趣选科更有利于大学的专业学习,因而在新高考改革之下更需引导学生从兴趣因素选择考试科目。

关键词：新高考科目选择动机兴趣策略专业满意度专业承诺

新型建筑技术与建筑材料在可持续发展中的应用

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农业伦理学融入农学院校课程的思政价值及其实践路径

建筑与装饰 2024年第3期 187-189页

作者：袁丹中机第一设计研究院有限公司安徽合肥 230601

环保、节能绿色建筑思想深入人心,尤其是一些建筑中融入了节能建筑理念,既满足了生活需求,也达到了节约成本的目的,这对提升人们生活质量,减少能源消耗具有重要的意义.但是从现阶段来看,我国建筑节能技术还不成熟,在应用上还未普及,在... 详细信息

环保、节能绿色建筑思想深入人心,尤其是一些建筑中融入了节能建筑理念,既满足了生活需求,也达到了节约成本的目的,这对提升人们生活质量,减少能源消耗具有重要的意义.但是从现阶段来看,我国建筑节能技术还不成熟,在应用上还未普及,在推广上还不到位,一些技术需要专业人员施工才能实现,但是建筑企业缺乏绿色施工人才,导致建筑节能技术很难真正地落实到具体的施工中,因此,本文对建筑绿色施工管理以及建筑节能技术等方面进行研究.

关键词：新型建筑技术建筑材料可持续发展

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草业科学 2024年第5期41卷 1266-1273页

作者：周岐燃袁丹王平周青平西华大学机械工程学院四川成都611730 西华大学建筑与土木工程学院四川成都611730 喀什大学物理与电气工程学院新疆喀什844000 西南民族大学草地资源学院四川成都610041

农业伦理观的缺失是我国“三农问题”长期得不到妥善解决的根源之一,高等院校课程思政建设是实现人才培养质量提升的重要抓手,将农业伦理学融入农学院校课程思政,建立农业伦理学学科体系,培养具有大国农业情怀的新时代农学工作者极为迫... 详细信息

农业伦理观的缺失是我国“三农问题”长期得不到妥善解决的根源之一,高等院校课程思政建设是实现人才培养质量提升的重要抓手,将农业伦理学融入农学院校课程思政,建立农业伦理学学科体系,培养具有大国农业情怀的新时代农学工作者极为迫切。本文阐述了国内外农业伦理学的起源和发展,以及中国农业伦理学内涵,指出了农业伦理学融入农学院校课程思政的价值,提出了推广农业伦理学核心通识课程、建立农业伦理学研究体系、发掘农业伦理中的思政元素、搭建农业伦理课程思政交流平台、健全农业伦理课程思政教学评价体系等建议,对于促进农业伦理学学科体系发展和农业可持续发展具有重要意义。

关键词：农业伦理课程思政实践路径农业生态

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中小学作业治理中的利益冲突与化解

当代教研论丛 2024年第1期10卷 1-4页

作者：袁单单吴支奎安徽师范大学教育科学学院安徽芜湖241000

双减背景下,“减负增效”意见的提出促使中小学转变作业观念,积极开展作业治理,但治理进展远不如预期,出现治理无序、作业功能异化、家长焦虑、教师增负、校际竞争加剧等诸多教育乱象,究其原因在于利益冲突。作业治理中的利益冲突主要... 详细信息

双减背景下,“减负增效”意见的提出促使中小学转变作业观念,积极开展作业治理,但治理进展远不如预期,出现治理无序、作业功能异化、家长焦虑、教师增负、校际竞争加剧等诸多教育乱象,究其原因在于利益冲突。作业治理中的利益冲突主要表征为私益—公益、私益—私益冲突。虽然利益冲突无法避免,但作业治理属于教育问题,而教育利益的特殊性体现在利益主体间目的的一致性——促进学生的发展。因此,以共治着力化解中小学作业治理中的利益冲突便是解决当下基础教育工作的燃眉之急。

关键词： “减负增效” 作业治理利益主体利益冲突

SYNTHESIS OF A SILICON-CONTAINING FLAME RETARdanT AND ITS SYNERGISTIC EFFECT WITH POTASSIUM-4-(PHENYLSULFONYL)BENZENESULFONATE(KSS) IN POLYCARBONATE(PC)

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Chinese Journal of Polymer Science 2013年第10期31卷 1352-1358页

作者： dan-dan yuan Xu-fu Cai Department of Polymer Science and Materials State Key Laboratory of Polymer Materials Engineering Sichuan University

A novel flame retardant （DAPSiO）, containing silicon and nitrogen, was synthesized by using dichlorodiphenylsilane, γchloropropyl methyl dimethoxysilane and 1,2-ethanediamine. DAPSiO was used together with potassium-4-（phenylsulfonyl）benzenesulfonate （KSS） to prepare a flame-retardant system for polycarbonate （PC）. The structure of DAPSiO was characterized by Fourier transform infrared spectroscopy （FTIR）, and 1H-NMR tests. Flammability and thermal behaviors of PC/KSS/DAPSiO systems were estimated by limited oxygen index （LOI）, vertical burning test （UL-94） and thermogravimetric analysis （TGA） tests. The results showed that the flame retardancy and thermal stability of PC/KSS system were improved with the addition of DAPSiO. When 1 wt% DAPSiO and 0.5 wt% KSS were incorporated, the LOI value of PC was found to be 44, and class V-0 of UL-94 test was passed. The scanning electron microscopy （SEM） and FTIR indicated that PC/KSS/DAPSiO system held a more cohesive and denser char structure when compared with pure PC and PC/KSS system.

关键词： Flame retardant Thermal properties Silicon Polycarbonate.

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城市园林景观土地利用空间布局合理设计方法

计算机仿真 2024年第8期41卷 530-534页

作者：原丹丹姚延涛晋中信息学院食品与环境学院山西晋中030800 山西农业大学林学院山西晋中030800

园林景观空间布局的设计要考虑到土地不同功能需求,同时也要注重美学,将各种景观元素巧妙地结合起来,以实现全面协调的效果。由于景观土地的布局指标有不同的计量单位和数量级,导致空间布局设计难度较大。为进一步优化园林土地利用率,... 详细信息

园林景观空间布局的设计要考虑到土地不同功能需求,同时也要注重美学,将各种景观元素巧妙地结合起来,以实现全面协调的效果。由于景观土地的布局指标有不同的计量单位和数量级,导致空间布局设计难度较大。为进一步优化园林土地利用率,均衡分配土地资源,提出城市园林景观土地利用空间布局设计方法。无量纲处理地形位指数、植被覆盖率和景观风险指数等指标。将地域性、复层种植、季节性作为设计原则,结合土地利用现状,建立空间布局数学模型,以协调性和设计费用最小为目标函数,确立约束条件。利用模拟退火算法改进粒子群收敛性能,设置位置和速度迭代公式,通过不断迭代求解空间布局设计的数学模型,得到最佳设计方案。实验结果表明,所提方法设计的土地空间布局合理,提高了土地利用率。

关键词：城市园林景观土地利用空间布局设计改进粒子群优化算法目标函数