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UV/H_(2)O_(2)促进饮用水氯化消毒中高毒性卤代乙醛生成的机制

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科学通报 2024年第26期69卷 3984-3994页

作者：王玉姚璐杨欣中山大学环境科学与工程学院广东省环境污染控制与修复技术重点实验室广州510006 仲恺农业工程学院资源与环境学院广州510225

饮用水消毒过程中,氯不可避免地与溶解性有机质(dissolved organic matter,DOM)发生反应,进而生成消毒副产物(disinfection byproducts,DBPs).随着紫外/过氧化氢高级氧化技术(UV/H_(2)O_(2)advanced oxidation process,UV/H_(2)O_(2)AOP)广泛应用于水中新污染物的去除,DOM的结构及其DBPs生成潜能也将发生改变.但目前关于该工艺对不同类型DOM生成DBPs的影响及反应机制尚不清楚,特别是Br^(-)存在下高毒性溴代DBPs的生成潜能亟待研究.本研究通过生成潜能试验探究了Br^(-)存在和不存在下UV/H_(2)O_(2)对6种天然有机质(natural organic matter,NOM)和藻类有机质(algal organic matter,AOM)在氯化消毒过程中DBPs的生成潜能及反应机制.结果表明,UV/H_(2)O_(2)均显著促进了NOM和AOM的DBPs生成潜能,且AOM的上升趋势更为显著.当Br-存在时,UV/H_(2)O_(2)氧化后使AOM的DBPs生成潜能和毒性分别增加了4.1~4.7倍和49~81倍.荧光光谱分析结果表明UV/H_(2)O_(2)主要通过改变AOM的蛋白质或微生物代谢物等结构促进氯化过程中高毒性溴代乙醛(brominated haloacetaldehydes,Br-HALs)生成.进一步利用模型化合物探究UV/H_(2)O_(2)影响Br-HALs生成的机制,结果表明UV/H_(2)O_(2)改变了AOM中氨基酸等的分子结构,生成的氧化产物在后氯化过程中与HOBr(由氯与Br^(-)反应而成)反应生成高毒性Br-HALs.采用MIEX?DOC树脂预处理和氯胺替代消毒的方式可以使DBPs的生成潜能分别降低48.1%~96.7%和83.5%~97.7%,其中氯胺替代消毒可使DBPs的总毒性降低84.2%~98.2%.本研究可为饮用水厂应对含溴高藻水污染问题提供科学参考并指导生产.

关键词：饮用水处理 UV/H_(2)O_(2) 溴溶解性有机质消毒副产物生成机制

Transport properties of Hall-type quantum states in disordered bismuthene

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Chinese Physics B 2024年第4期33卷 16-23页

作者：周娇娇余江应成淑光江华 Key Laboratory of Advanced Electronic Materials and Devices School of Mathematics and PhysicsAnhui Jianzhu UniversityHefei 230601China Department of Physics Northwest UniversityXi'an 710069China School of Physical Science and Technology Soochow UniversitySuzhou 215006China

Bismuthene,an inherently hexagonal structure characterized by a huge bulk gap,offers a versatile platform for investigating the electronic transport of various topological quantum *** nonequilibrium Green's function method and Landauer-Büttiker formula,we thoroughly investigate the transport properties of various Hall-type quantum states,including quantum spin Hall(QSH)edge states,quantum valley Hall kink(QVHK)states,and quantum spin-valley Hall kink(QSVHK)states,in the presence of various *** on the exotic transport features,a spin-valley filter,capable of generating a highly spin-and valley-polarized current,is *** valley index and the spin index of the filtered QSVHK state are determined by the staggered potential and the intrinsic spin-orbit coupling,*** efficiency of the spin-valley filter is supported by the spacial current distribution,the valley-resolved conductance,and the spin-resolved *** with a sandwich structure for QSVHK,our proposed spin-valley filter can work with a much smaller size and is more accessible in the experiment.

关键词： electronic transport bismuthene spin-valley filter

Review of Baduanjin and resistance exercise for the mental health of patients with hematologic malignancies

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World Journal of Psychiatry 2024年第8期14卷 1165-1173页

作者： Ya-Zhou Shen Feng Chen Jia-Wen yu Yan Zhang Ling-Xiang Lu Yong-Li Huo Si-Ting Chu Bing Cao Lei-Wen Tang Department of Nursing Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhou 310000Zhejiang ProvinceChina Department of Nursing The Second Affiliated Hospital of Zhejiang University School of MedicineHangzhou 310000Zhejiang ProvinceChina

Patients with hematological tumors experience physical and psychological stress,and negative psychological ***,an emerging psychological rehabil-itation method combined with resistance exercise,has received widespread *** study reviews the current status of the application of Baduanjin combined with resistance exercise in improving the negative psychological state of patients with hematological tumors and discusses its problems and *** a literature review and comprehensive analysis,the application of Baduanjin and resistance exercise in the psychological rehabilitation of patients with hematological tumors was identified and *** results showed that Baduanjin with resistance exercise had a positive effect on improving negative psychological states of patients with hematological tumors,which can alleviate anxiety,depression,and other adverse emotions,and improve quality of ***,there is a lack of unified and standardized exercise intervention programs for practical application,and patient participation and compliance must be *** combined with resistance exercise can potentially improve the negative psychological status of patients with hematological tumors;however,it is still necessary to further standardize and improve the exercise program improving patient participation and *** studies should strengthen theoretical exploration and empirical research,providing more effective psychological rehabilitation strategies for patients with hematological tumors.

关键词： Hematological tumors Baduanjin Resistance exercise Negative psychological state Psychological rehabilitation

基于优化A-BiLSTM的滚动轴承故障诊断

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吉林大学学报（工学版） 2024年第8期54卷 2156-2166页

作者：余萍赵康曹洁兰州理工大学电气工程与信息工程学院兰州730050 甘肃省工业过程控制重点实验室兰州730050 兰州理工大学电气与控制工程国家级实验教学示范中心兰州730050

为提高超参数设置的效率及其与模型的适配性,改善人工设置模型参数的高成本和低效率问题,提出一种基于蜜獾算法(Honey badger algorithm,HBA)优化注意力双向长短时记忆网络(HBA-A-BiLSTM)的滚动轴承故障诊断方法。首先,通过HBA对A-BiLST... 详细信息

为提高超参数设置的效率及其与模型的适配性,改善人工设置模型参数的高成本和低效率问题,提出一种基于蜜獾算法(Honey badger algorithm,HBA)优化注意力双向长短时记忆网络(HBA-A-BiLSTM)的滚动轴承故障诊断方法。首先,通过HBA对A-BiLSTM模型进行最优超参数组合搜寻,然后基于最优超参数下的A-BiLSTM模型进行故障诊断性能测试。最后,基于不同工况的数据集进行模型泛化能力测试。采用CWRU数据集对所提方法的故障诊断效果进行验证,利用诊断精度以及混淆矩阵进行评价。实验结果表明,与其他群智能优化算法相比,蜜獾算法搜索全局性能好,收敛速度快,优化后的最终模型的故障诊断准确率达到了99.5%,具有良好的效果,且在不同工况下能够实现稳定、准确的故障诊断性能,泛化能力强。

关键词：故障诊断蜜獾算法参数优化双向长短时记忆网络注意力机制

中国成为世界重要教育中心:何以必要、何以可能与何以可为

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新疆师范大学学报（哲学社会科学版） 2024年第1期45卷 127-138页

作者：周洪宇李宇阳华中师范大学教育学院湖北武汉430079 国家教育治理研究院湖北武汉430079

纵观文艺复兴以来的世界历史,世界教育中心的形成与转移皆有迹可循——意大利、英国、法国、德国、美国先后成为世界教育中心。成为世界重要教育中心,既是我国教育发展的宏伟目标与重要归宿,又是以中国式教育现代化助推中华民族伟大复... 详细信息

纵观文艺复兴以来的世界历史,世界教育中心的形成与转移皆有迹可循——意大利、英国、法国、德国、美国先后成为世界教育中心。成为世界重要教育中心,既是我国教育发展的宏伟目标与重要归宿,又是以中国式教育现代化助推中华民族伟大复兴的需要,更是世界各国人民利益所系。回首历史、立足现在、展望未来,中国教育凤凰涅槃势不可挡。当前,全球创新格局发生明显变化,呈现由欧美地区向亚太地区、由大西洋区域向太平洋区域转移的趋势。我们要抓住历史机遇,在借鉴世界教育中心成功经验的基础上,结合中国本土教育实践,不断提升中国教育的支撑力、贡献力、国际影响力和全球引领力,使中国早日成为世界重要教育中心。

关键词：世界教育中心教育强国中国式教育现代化中国式现代化

Metal-Free,Site-Selective C-H Fluorination of Heteroarenes Under Visible Light

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CCS Chemistry 2024年第7期6卷 1681-1688页

作者： Cheng Huang Chang-Ming You yu-Shu Qin Rui-Nan Ci Peng Xiao Sheng Tang Bin Liu Zhenhong Wei Li-Zhu Wu Hu Cai School of Chemistry and Chemical Engineering Nanchang UniversityNanchangJiangxi 330031 Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesBeijing 100190 School of Future Technology University of Chinese Academy of SciencesBeijing 100049

The site-selective C-H fluorination of heteroarenes is a straightforward approach to accessing valuable heteroaryl fluorides but remains a formidable ***,we report a general strategy for visible-light-induced C-H fluorination of heteroarenes via the merger of N-F fluorinating reagents and *** paramagnetic resonance experiments provide evidence for the homolytic cleavage of the N-F bond under blue light-emitting diode irradiation,which is the key step in the *** transformation is metal-free,photocatalysts-free,and site-selective under mild reaction conditions(ambient temperature,visible-light irradiation,tolerant to H2O).The robustness of this protocol has also been highlighted by late-stage modification of complex and medicinally relevant molecules.

关键词： selective C-H fluorination heteroaryl fluorides C(sp^(2))-F bond formation photochemistry radical chemistry

Salivary metabolites are promising noninvasive biomarkers of druginduced liver injury

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World Journal of Gastroenterology 2024年第18期30卷 2454-2466页

作者： Si-Miao yu Hao-Cheng Zheng Si-Ci Wang Wen-Ya Rong Ping Li Jing Jing Ting-Ting He Jia-Hui Li Xia Ding Rui-Lin Wang School of Traditional Chinese Medicine Beijing University of Chinese MedicineBeijing 100029China School of Traditional Chinese Medicine Southern Medical UniversityGuangzhou 510515Guangdong ProvinceChina Department of Hepatology of Traditional Chinese Medicine The Fifth Medical Center of PLA General HospitalBeijing 100039China The First Clinical Medical College Henan University of Traditional Chinese MedicineZhengzhou 450000Henan ProvinceChina

BACKGROUND Drug-induced liver injury(DILI)is one of the most common adverse events of medication use,and its incidence is ***,early detection of DILI is a crucial challenge due to a lack of biomarkers and noninvasive *** To identify salivary metabolic biomarkers of DILI for the future development of noninvasive diagnostic *** Saliva samples from 31 DILI patients and 35 healthy controls(HCs)were subjected to untargeted metabolomics using ultrahigh-pressure liquid chromatography coupled with tandem mass *** analyses,including partial least squares-discriminant analysis modeling,t tests and weighted metabolite coexpression network analysis(WMCNA),were conducted to identify key differentially expressed metabolites(DEMs)and metabolite *** we utilized least absolute shrinkage and selection operato and random fores analyses for biomarker *** use of each metabolite and metabolite set to detect DILI was evaluated with area under the receiver operating characteristic *** We found 247 differentially expressed salivary metabolites between the DILI group and the HC *** WMCNA,we identified a set of 8 DEMs closely related to liver injury for further prediction ***,the distinct separation of DILI patients and HCs was achieved with five metabolites,namely,12-hydroxydodecanoic acid,3-hydroxydecanoic acid,tetradecanedioic acid,hypoxanthine,and inosine(area under the curve:0.733-1).CONCLUSION Salivary metabolomics revealed previously unreported metabolic alterations and diagnostic biomarkers in the saliva of DILI *** study may provide a potentially feasible and noninvasive diagnostic method for DILI,but further validation is needed.

关键词： Drug-Induced liver injury Salivary Metabolomics Biomarker Weighted metabolite Coexpression network analysis Machine learning Noninvasive Diagnostic method Metabolites

Emerging probing perspective of two-dimensional materials physics:terahertz emission spectroscopy

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Light(Science & Applications) 2024年第7期13卷 1278-1298页

作者： Yifei Wu yuqi Wang Di Bao Xiaonan Deng Simian Zhang Lin yu-chun Shengxian Ke Jianing Liu Yingjie Liu Zeli Wang Pingren Ham Andrew Hanna Jiaming Pan Xinyue Hu Zhengcao Li Ji Zhou Chen Wang State Key Laboratory of New Ceramics and Fine Processing Key Laboratory of Advanced Materials of Ministry of EducationSchool of Materials Science and EngineeringTsinghua University100084 BeijingChina Beijing Advanced Innovation Center for Integrated Circuits 100084 BeijingChina

Terahertz(THz)emission spectroscopy(TES)has emerged as a highly effective and versatile technique for investigating the photoelectric properties of diverse materials and nonlinear physical processes in the past few ***,research on two-dimensional(2D)materials has experienced substantial growth due to their atomically thin structures,exceptional mechanical and optoelectronic properties,and the potential for applications in flexible electronics,sensing,and ***,these materials offer advantages such as tunable bandgap,high carrier mobility,wideband optical absorption,and relatively short carrier *** applying TES to investigate the 2D materials,their interfaces and heterostructures,rich information about the interplay among photons,charges,phonons and spins can be unfolded,which provides fundamental understanding for future *** it is timely to review the nonlinear processes underlying THz emission in 2D materials including optical rectification,photon-drag,high-order harmonic generation and spin-to-charge conversion,showcasing the rich diversity of the TES employed to unravel the complex nature of these *** applications based on THz emissions,such as THz lasers,ultrafast imaging and biosensors,are also *** further,we analyzed the unique advantages of spintronic terahertz emitters and the future technological advancements in the development of new THz generation mechanisms leading to advanced THz sources characterized by wide bandwidth,high power and integration,suitable for industrial and commercial *** continuous advancement and integration of TES with the study of 2D materials and heterostructures promise to revolutionize research in different areas,including basic materials physics,novel optoelectronic devices,and chips for post-Moore’s era.

关键词： optoelectronic versatile exceptional

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实践活动中小组互动对创造性思维的影响研究

化学教学 2024年第9期 20-26页

作者：于晨余瑾占小红华东师范大学上海200062 上海市风华中学上海200072

构建实践活动中小组互动话语识别框架和创造性思维水平框架,对61个实践活动的小组互动片段进行分析,探索实践活动中小组互动对创造性思维的影响机制,并为优化实践活动教学和提升学生创造性思维水平提出建议。

关键词：实践活动小组互动创造性思维影响机制