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An improved algorithm based on equivalent sound velocity profile method at large incident angle

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Acta Oceanologica Sinica 2024年第2期43卷 161-167页

作者： qianqian li Qian Tong Fanlin Yang Qi li Zhihao Juan Yu Luo College of Geodesy and Geomatics Shandong University of Science and TechnologyQingdao 266590China College of Underwater Acoustic Engineering Harbin Engineering UniversityHarbin 150001China

With the development of ultra-wide coverage technology,multibeam echo-sounder(MBES)system has put forward higher requirements for localization accuracy and computational efficiency of ray tracing *** classical equivalent sound speed profile(ESSP)method replaces the measured sound velocity profile(SVP)with a simple constant gradient SVP,reducing the computational workload of beam ***,in deep-sea environment,the depth measurement error of this method rapidly increases from the central beam to the edge *** analyzing the positioning error of the ESSP method at edge beam,it is discovered that the positioning error increases monotonically with the incident angle,and the relationship between them could be expressed by polynomial ***,an error correction algorithm based on polynomial fitting is *** simulation experiment conducted on an inclined seafloor shows that the proposed algorithm exhibits comparable efficiency to the original ESSP method,while significantly improving bathymetry accuracy by nearly eight times in the edge beam.

关键词： equivalent sound speed profile ray tracing method large incident angle edge beam deep sea error correction multibeam echo-sounder system

An improved positioning model of deep-seafloor datum point at large incidence angle

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Journal of Oceanology and limnology 2024年第1期42卷 90-100页

作者： qianqian li Shoulian CAO Fanlin YANG Yu LUO Qian TONG College of Underwater Acoustic Engineering Harbin Engineering UniversityHarbin 150000China College of Geodesy and Geomatics Shandong University of Science and TechnologyQingdao 266590China Key Laboratory of Ocean Geomatics Ministry of Natural ResourcesQingdao 266590China

The inhomogeneous sound speed in seawater causes refraction of sound waves,and the elimination of the refraction effect is essential to the accuracy of underwater acoustic *** raytracing method is an indispensable tool for effectively handling ***,this method has a conflict between localization accuracy and computational *** equivalent sound speed profile(ESSP)method uses a simple sound speed profile(SSP)instead of the actual complex SSP,which can improve positioning precision but with residual *** residual error is especially non-negligible in deep water and at large beam incidence *** analyzing the residual error of the ESSP method through a simulation,an empirical formula of error is *** data collected in the sailing circle mode(large incidence angle)of the South China Sea are used for *** experiments show that compared to the ESSP method,the improved algorithm has higher positioning precision and is more efficient than the ray-tracing method.

关键词： underwater acoustic positioning seafloor datum points large incident angle equivalent sound speed profile(ESSP) deep water

Hole-Transporting Materials with Rational Combination of Pyridine and Dibenzo[a,c]phenazine as Electron Acceptor for Dopant-Free Perovskite Solar Cells

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Chinese Journal of Chemistry 2024年第10期42卷 1100-1106页

作者： Weidong ling Fei Wu Wentao Yuan linna Zhu qianqian li Zhen li Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials Department of ChemistryWuhan UniversityWuhanHubei 430072China Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energy Faculty of Materials&EnergySouthwest UniversityChongqing400715China TaiKang Center for life and Medical Sciences Wuhan UniversityWuhanHubei 430072China

Perovskite solar cells(PSCs)have been proven to be a promising option for photovoltaic *** the aim to achieve efficient and stable PSCs,it is essential to explore dopant-free hole-transporting materials(HTMs)with high hole ***,HTMs bearing electron donor(D)-electron acceptor(A)-electron donor(D)structures have been constructed with strong intramolecular charge transfer(ICT)effect,based on rational combination of dibenzo[a,c]phenazine and pyridine as electronic acceptors and anchoring groups to perovskite ***,high hole mobility(7.31×10^(-5) cm^(2)·V^(-1)·s^(-1))and photoelectric conversion efficiency(20.45%)have been achieved by dopant-free DPyP-based *** afforded an efficient way to design HTMs with high hole mobility by adjustment of molecular configurations and electronic property of conjugated systems.

关键词： Perovskite solar cell Charge transfer Donor-acceptor systems Energy conversion Hole mobility

Catalytic degradation of chlorinated volatile organic compounds(CVOCs)over Ce-Mn-Ti composite oxide catalysts

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Journal of Environmental Sciences 2024年第4期138卷 326-338页

作者： Zhiwei Zhou qianqian li Guijin Su Jiaxin Pang Bohua Sun Jing Meng Bin Shi Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou 450052China Key Laboratory of Environmental Nanotechnology and Health Effects State Key Laboratory of Environmental Chemistry and EcotoxicologyResearch Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

Developing industrially moldable catalysts with harmonized redox performance and acidity is of great significance for the efficient disposal of chlorinated volatile organic compounds(CVOCs)in actual exhaust ***,commercial TiO_(2),typically used for molding catalysts,was chosen as the carrier to fabricate a series of Ce_(0.02)Mn_(0-0.24)TiO_(x) materials with different Mn doping ratios and employed for chlorobenzene(CB)*** introduction of Mn remarkedly facilitated the synergistic effect of each element via the electron transfer processes:Ce^(3+)+Mn^(4+/3+)■Ce^(4+)+Mn^(3+/2+)and Mn^(4+/3+)+Ti^(4+)■Mn^(3+/2+)+Ti^(3+).These synergistic interactions in Ce_(0.02)Mn_(0.04-0.24)TiO_(x),especially Ce_(0.02)Mn_(0.16)TiO_(x),significantly elevated the active oxygen species,oxygen vacancies and redox properties,endowing the superior catalytic oxidation of *** the Mn doping amount increased to 0.24,a separate Mn_(3)O_(4) phase appeared,which in turn might weaken the synergistic ***,the acidity of Ce_(0.02)Mn_(0.04-0.24)TiO_(x) was decreased with the Mn doping,regulating the balance of redox property and ***,Ce_(0.02)Mn_(0.16)TiO_(x) featured relatively abundant B-acid *** coordinating redox ability and moderate acidity promoted the deep oxidation of CB and RCOOH-intermediates,as well as the rapid desorption of Cl species,thus obtaining sustainable *** comparison,CeTiO_(x) owned the strongest acidity,however,its poor redox property was not sufficient for the timely oxidative decomposition of the easier adsorbed CB,resulting in its rapid *** finding provides a promising strategy for the construction of efficient commercial molding catalysts to decompose the industrial-scale CVOCs.

关键词： Chlorobenzene Ce_(0.02)Mn_(0-0.2)4tiox materials Redox ability Acidity Synergistic interaction

Source apportionment and suitability evaluation of seasonal VOCs contaminants in the soil around a typical refining-chemical integration park in China

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Journal of Environmental Sciences 2024年第3期137卷 651-663页

作者： Xu Zhao Jing Meng qianqian li Guijin Su Qifan Zhang Bin Shi lingwen Dai Yong Yu Key Laboratory of Environmental Nanotechnology and Health Effects State Key Laboratory of Environmental Chemistry and EcotoxicologyResearch Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring China National Environmental Monitoring CenterBeijing 100012China

Accurate source apportionment of volatile organic compounds(VOCs)in soil nearby petrochemical industries prevailing globally,is critical for preventing ***,in the process,seasonal effect on contamination pathways and accumulation of soil VOCs is often ***,Yanshan Refining-Chemical Integration Park,including a carpet,refining,synthetic rubber,and two synthetic resin zones,was selected for *** variations resulted in a gradual decrease of 31 VOCs in soil from winter to summer.A method of dry deposition resistance model coupling partitioning coefficient model was created,revealing that dry deposition by gas phase was the primary pathway for VOCs to enter soil in winter and spring,with 100 times higher fux than by particle *** profiles for five zones were built by gas sampling with distinct substance indicators screened,which were used for positive matrix factorization factors *** of the five zones were 14.9%,20.8%,13.6%,22.1%,and 28.6%in winter and 33.4%,12.5%,10.7%,24.9%,and 18.5%in spring,*** variation in the soil sorption capacity of VOCs causes inter-seasonal differences in *** better correlation between dry deposition capacity and soil storage of VOCs made root mean square and mean absolute errors decrease averagely by 8.8%and 5.5%in winter compared to *** study provides new perspectives and methods for the source apportionment of soil VOCs contamination in industrial sites.

关键词： Dry deposition resistance model Positive matrix factorization model Partitioning coefficient model Contamination pathway Source profile

iTRAQ-based proteomics reveals the mechanism of action of Yinlai decoction in treating pneumonia in mice consuming a high-calorie diet

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Journal of Traditional Chinese Medical Sciences 2024年第1期11卷 21-32页

作者： qianqian li Tiegang liu Chen Bai Xueyan Ma Hui liu Zi’an Zheng Yuxiang Wan He Yu Yuling Ma Xiaohong Gu School of Traditional Chinese Medicine Beijing University of Chinese MedicineBeijing 102488China Institute of Chinese Medicine Epidemic Disease Beijing University of Chinese MedicineBeijing 102488China School of Traditional Chinese Medicine Guizhou University of Traditional Chinese MedicineGuiyang 550025China Department of Acupuncture and Mini-invasive Oncology Beijing University of Chinese Medicine Third Affiliated HospitalBeijing 100029China OCMRC Center University of OxfordOxford OX13PTUnited Kingdom

Objective:To uncover the underlying mechanisms of action of the Yinlai decoction on high-calorie dietinduced pneumonia through proteomics ***:Based on the Gene Expression Omnibus(GEO)database,lung tissue samples from normal and high-fat diet(HFD)fed mice in the GSE16377 dataset were selected as test cohorts to identify differentially expressed genes and conduct bioinformatics *** the animal experiments,mice were randomly divided into the control(N),high-calorie diet pneumonia(M),and Yinlai decoction treatment(Y)*** in the M group received high-calorie feed and a 0.5 mg/mL lipopolysaccharide solution spray for 30 min for 3 *** mice in the Y group were intragastrically administered 2 mL/10 g Yinlai decoction twice daily for 3 *** evaluation of the lung tissue was *** expressed proteins(DEPs)in the lung tissue were identified using quantitative proteomics and bioinformatics *** drug-target relationships between Yinlai decoction and core DEPs in the lung tissue were verified using AutoDock Vina and Molecular Graphics Laboratory(MGL)*** were verified by western ***:GEO data mining showed that an HFD altered oxidative phosphorylation in mouse lung *** Yinlai decoction alleviated pathological damage to lung tissue and pneumonia in mice that were fed a high-calorie diet.A total of 47 DEPs were identified between the Y and M *** analysis revealed their association with energy metabolism pathways such as the tricarboxylic acid cycle(TCA)and oxidative *** protein-protein interaction network revealed that Atp5a1,Pdha1,and Sdha were the target proteins mediating the therapeutic effects of Yinlai *** docking results suggested that the mechanism of the therapeutic effect of Yinlai decoction involves the binding of brassinolide,praeruptorin B,chrysoeriol,and other components in Yinlai decoction to ***:The Yinlai decoction allevia

关键词： Yinlai decoction High-calorie diet Pneumonia iTRAQ proteomics Energy metabolism

2022汤加海底火山活动的测高海面观测异常分析

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测绘学报 2024年第2期53卷 263-273页

作者：李倩倩鲍李峰王勇中国科学院精密测量科学与技术创新研究院大地测量与地球动力学国家重点实验室湖北武汉430077 中国科学院大学北京100049

2022年1月14日—2022年1月15日,汤加海底火山发生剧烈喷发并造成全球性海啸,引起了国际广泛关注。针对汤加火山喷发引起的海洋环境异常综合观测,本文提出了利用Jason-3测高卫星数据研究火山喷发对海洋环境的短期和长期影响。针对短期影... 详细信息

2022年1月14日—2022年1月15日,汤加海底火山发生剧烈喷发并造成全球性海啸,引起了国际广泛关注。针对汤加火山喷发引起的海洋环境异常综合观测,本文提出了利用Jason-3测高卫星数据研究火山喷发对海洋环境的短期和长期影响。针对短期影响,利用距离火山最近的弧段186的重复轨道,对比不同时间观测值,分析火山喷发时期海平面变化、有效波高和电离层总电子含量(TEC)异常。结果表明:卫星测高可观测到火山喷发引起的海面异常。火山喷发期间:海平面产生短期变化,原因可能与火山活动引起的波浪、海洋环境变化和海底地形变化有关;火山喷发引起部分海域有效波高显著增加,弧段186区域电离层TEC明显降低。针对长期影响,构建了研究区域内2016年2月—2023年2月共7年区域平均海面观测时间序列,并采用小波变换、奇异谱分析方法探测时间序列中的异常扰动,分析其与火山活动的关系,从而推断火山喷发活动对海洋环境的长期影响。结果表明:火山喷发可能会对海平面变化产生长期影响,海平面变化分布与俯冲带位置相关,其影响还与EI Nino和La Nina事件产生的影响耦合,需要更多资料进一步分析;另外,汤加火山喷发对研究海域内的平均有效波高和电离层TEC分布长期影响较小。

关键词：汤加火山卫星测高海平面变化电离层异常有效波高

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球形TiNb_(2)O_(7)的固相法制备和嵌脱锂离子性能研究

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新能源进展 2024年第3期12卷 361-364页

作者：李倩倩康宗维李鹏北方奥钛纳米技术有限公司河北邯郸056300 河北格力钛新能源有限公司河北邯郸056300

通过湿法研磨和喷雾干燥法制备球形前驱体,采用高温固相法合成球形TiNb_(2)O_(7)材料,并对其进行XRD、SEM表征和电化学性能测试。结果表明,制备的TiNb_(2)O_(7)是由一次颗粒组成的二次球形颗粒,平均粒径约4~6μm,内部存在大量孔隙;以0.... 详细信息

通过湿法研磨和喷雾干燥法制备球形前驱体,采用高温固相法合成球形TiNb_(2)O_(7)材料,并对其进行XRD、SEM表征和电化学性能测试。结果表明,制备的TiNb_(2)O_(7)是由一次颗粒组成的二次球形颗粒,平均粒径约4~6μm,内部存在大量孔隙;以0.1 C在0.8~3.0 V电压下充放电,球形TiNb_(2)O_(7)材料首次放电比容量为316.5 mA·h/g,首次库伦效率为99.7%,1 C倍率下经过100次循环后,容量保持率为82.0%,10 C倍率下的放电比容量为234.7 mA·h/g,具有良好的倍率性能。

关键词：锂离子电池 TiNb_(2)O_(7) 固相法电化学性能

青少年特发性脊柱侧凸患者术后早期离床活动的研究进展

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中国护理管理 2024年第6期24卷 872-876页

作者：李倩倩王秀玲安徽医科大学附属阜阳人民医院骨科脊柱及创伤病区安徽省阜阳市236000

青少年特发性脊柱侧凸行后路矫形融合术患者术后早期离床活动可促进呼吸、胃肠、肌肉骨骼等多系统功能恢复,有利于预防肺部感染、压力性损伤和下肢深静脉血栓形成。文章综述了青少年特发性脊柱侧凸患者术后早期离床活动的时机、内容、... 详细信息

青少年特发性脊柱侧凸行后路矫形融合术患者术后早期离床活动可促进呼吸、胃肠、肌肉骨骼等多系统功能恢复,有利于预防肺部感染、压力性损伤和下肢深静脉血栓形成。文章综述了青少年特发性脊柱侧凸患者术后早期离床活动的时机、内容、效果、影响因素、存在问题等研究进展,旨在为临床医护人员安全有效地指导青少年特发性脊柱侧凸患者术后早期离床活动及相关研究提供参考。

关键词：青少年特发性脊柱侧凸下床综述