检索结果-南通市图书馆

Chinese Journal of Chemical Engineering 2024年第1期65卷 1-7页

作者： Risheng Shen Shilong Li Yuqing Sun yuan bai Jian Lu Wenheng Jing State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing Tech UniversityNanjing 210009China National Energy Group Science and Technology Research Institute Co. Ltd.Nanjing 210023China

Membrane technology has become the mainstream process for the production of electronic grade hydrogen peroxide(H_(2)O_(2)).But due to the oxidation degradation of the organic membranes(***)by the strong oxidative radicals(e.g.OH)generated via the activation of H_(2)O_(2)by iron ions(Fe^(3+)),the short effective lifetime of membranes remains a *** nano tin oxide(SnO_(2))has great potential for the removal of Fe^(3+)in strongly oxidative H_(2)O_(2)because of its ability to stabilize H2O_(2)and preferentially adsorb Fe^(3+).Herein,we have designed for the first time a flower-like robust SnO_(2)membrane on the ceramic support by in situ template-free one-step hydrothermal *** three-dimensional loose pore structure in the membrane built by interlacing SnO_(2)nanosheets endows the SnO_(2)membrane with a high specific surface area and abundant adsorption sites(AOH).Based on the coordination complexation and electrostatic attraction between the SnO_(2)surface and Fe^(3+),the membrane shows a high Fe3+removal efficiency(83%)and permeability(24 L·m^(-2)·h^(-1)·MPa^(-1))in H_(2)O_(2).This study provides an innovative and simple approach to designing robust SnO_(2)membranes for highly efficient removal of Fe^(3+)in harsh environments,such as strong oxidation conditions.

关键词： Hydrogen peroxide SnO_(2)membrane Adsorption Hydrothermal

Visible Light-Induced Photocatalysis:Self-Fenton Degradation of p-CIPhOH Over Graphitic Carbon Nitride by a Polyethylenimine Bifunctional Catalyst

在线全文

学校读者我要写书评

暂无评论

Transactions of Tianjin University 2024年第2期30卷 130-139页

作者： yuan bai Shuangjun Li Bolin Yin Jinpeng Zhao Hexing Li Key Laboratory of Resource Chemistry of Ministry of Education Shanghai Key Laboratory of Rare Earth Functional MaterialsCollege of Chemistry and Materials ScienceShanghai Normal UniversityShanghai 200234China

Deep degradation of organic pollutants by sunlight-induced coupled photocatalytic and Fenton (photo-Fenton) reactions is of immense importance for water purification. In this work, we report a novel bifunctional catalyst (Fe-PEI-CN) by codoping graphitic carbon nitride (CN) with polyethyleneimine ethoxylated (PEI) and Fe species, which demonstrated high activity during p-chlorophenol (p-ClPhOH) degradation via H_(2)O_(2) from the photocatalytic process. The relationship between the catalytic efficiency and the structure was explored using diff erent characterization methods. The Fe modification of CN was achieved through Fe-N coordination, which ensured high dispersion of Fe species and strong stability against leaching during liquid- phase reactions. The Fe modification initiated the Fenton reaction by activating H_(2)O_(2) into ·OH radicals for deep degradation of p-ClPhOH. In addition, it eff ectively promoted light absorption and photoelectron-hole (e-h ^(+) ) separation, corresponding to improved photocatalytic activity. On the other hand, PEI could significantly improve the ability of CN to generate H_(2)O_(2) through visible light photocatalysis. The maximum H_(2)O_(2) yield reached up to 102.6 μmol/L, which was 22 times higher than that of primitive CN. The cooperation of photocatalysis and the self-Fenton reaction has led to high-activity mineralizing organic pollutants with strong durability, indicating good potential for practical application in wastewater treatment.

关键词： Fe-PEI-CN bifunctional catalyst Photo-Fenton p-chlorophenol(p-ClPhOH)degradation Synergetic effect

税收服务长江经济带发展战略的实践与思考——以湖北税务推进“税护长江”工程为例

在线全文

学校读者我要写书评

暂无评论

税务研究 2024年第6期 26-31页

作者：白渊国家税务总局湖北省税务局

长江经济带发展战略是关系国家发展全局的重大战略。税收作为国家宏观调控的重要政策工具,在服务长江经济带发展战略中大有可为。国家税务总局湖北省税务局实施“税护长江”工程,为税收服务长江经济带发展战略提供了实践经验。本文建议... 详细信息

长江经济带发展战略是关系国家发展全局的重大战略。税收作为国家宏观调控的重要政策工具,在服务长江经济带发展战略中大有可为。国家税务总局湖北省税务局实施“税护长江”工程,为税收服务长江经济带发展战略提供了实践经验。本文建议把准税收服务长江经济带发展战略的方向、构建税收服务长江经济带发展战略的联盟、完善税收服务长江经济带发展战略的税制、提升税收服务长江经济带发展战略的能力,以期更好发挥税收服务区域经济发展和中国式现代化的职能作用。

关键词：税收职能长江经济带绿色税制税收优惠税收营商环境

Compound extreme inundation risk of coastal wetlands caused by climate change and anthropogenic activities in the Yellow River Delta,China

在线全文

学校读者我要写书评

暂无评论

Advances in Climate Change Research 2024年第1期15卷 134-147页

作者： Xiao-Li WANG Ai-Qing FENG Xi-Yong HOU Qing-Chen CHAO bai-yuan SONG Yu-Bin LIU Qi-Guang WANG He XU Yu-Xin ZHANG Dong Li Li-Jie DONG Yu GUO CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China Shandong Key Laboratory of Coastal Environmental Processes Yantai 264003China China Meteorological Administration Key Laboratory for Climate Prediction Studies National Climate CentreBeijing 100081China Tongji Urban Planning Design Research Institute Shanghai 200092China School of Geography and Tourism Qilu Normal UniversityJinan 250200China China Meteorological Administration Training Centre China Meteorological AdministrationBeijing 10008China University of Chinese Academy of Sciences Beijing 100049China Marine Science and Technology College Zhejiang Ocean UniversityZhoushan 316022China

The coastal wetlands of the Yellow River Delta(YRD)in China are crucial for their valuable resources,environmental significance,and economic ***,these wetlands are also vulnerable to the dual threats of climate change and human *** substantial attention to the historical shifts in YRD's coastal wetlands,uncertainties remain regarding their future trajectory in the face of compound risks from climate change and anthropogenic *** on a range of remote sensing data sources,this study undertakes a comprehensive investigation into the evolution of YRD's coastal wetlands between 2000 and ***,the potential fate of coastal wetlands is thoroughly analyzed through the Land Use/Cover Change(LUCC)simulation using System Dynamic-Future Land Use Simulation(SD-FLUS)model and the extreme water levels projection integrated future sea-level rise,storm surge,and astronomical high tide in 2030,2050,and 2100 under scenarios of SSP1-2.6,SSP2-4.5,and *** revealed that YRD's coastal wetlands underwent a marked reduction,shrinking by 1688.72 km²from 2000 to *** decline was mostly attributed to the substantial expansion in the areas of artificial wetlands(increasing by 823.78 km2),construction land(increasing by 767.71 km²),and shallow water(increasing by 274.58 km²).Looking ahead to 2030-2100,the fate of coastal wetlands appears to diverge based on different *** the SSP1-2.6 scenario,the area of coastal wetland is projected to experience considerable *** contrast,the SSP5-8.5 scenario anticipates a notable decrease in coastal *** to the inundated area suffered from the current extreme water levels,the study projects a decrease of 6.8%-10.6%in submerged coastal wetlands by 2030 and 9.4%-18.2%by 2050 across all *** 2100,these percentages are projected to decrease by 0.4%(SSP2-4.5)and 27.1%(SSP5-8.5),but increase by 35.7%(SSP1-2.6).Results suggest that coastal wetlands in th

关键词： Climate change Anthropogenic activities Compound extreme risk Coastal wetlands Yellow River Delta

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

GNSS技术在煤炭勘查控制测量中的应用

陕西煤炭 2024年第9期43卷 136-141页

作者：白媛甘肃煤田地质局一四九队甘肃兰州730000

控制测量是地质测量中的基础工作,是煤炭勘查地质测量中重要的工作步骤。可靠的控制点成果可以有效保障煤炭勘查后续工作中测点的空间位置,同时可以提高整个测区地质图的精度。相较于传统的控制测量技术,GNSS技术以其自动化、全天候、... 详细信息

控制测量是地质测量中的基础工作,是煤炭勘查地质测量中重要的工作步骤。可靠的控制点成果可以有效保障煤炭勘查后续工作中测点的空间位置,同时可以提高整个测区地质图的精度。相较于传统的控制测量技术,GNSS技术以其自动化、全天候、高精度、高效益、测站间无需通视等显著特点在地勘工程测量作业中发挥着举足轻重的作用。以甘肃省永昌县H探区煤炭勘查为例,分析E级GNSS控制点测量的原理和控制测量工程的实施步骤,通过对数据处理结果的分析,得到可靠的成果资料,从控制网的设计到图根点测量,使煤炭勘查地质测量工作更加可靠、准确。

关键词： E级GNSS控制测量控制点基线解算网平差

Risk of infection with arboviruses in a healthy population in Pakistan based on seroprevalence

在线全文

学校读者我要写书评

暂无评论

Virologica Sinica 2024年第3期39卷 369-377页

作者： Shengyao Chen Muhammad Saqib Hafiz Sajid Khan yuan bai Usman Ali Ashfaq Muhammad Khalid Mansoor Abulimti Moming Jing Liu Min Zhou Saifullah Khan Niazi Qiaoli Wu Awais-Ur-Rahman Sial Shuang Tang Muhammad Hassan Sarfraz Aneela Javed Sumreen Hayat Mohsin Khurshid Iahtasham Khan Muhammad Ammar Athar Zeeshan Taj Bo Zhang Fei Deng Ali Zohaib Shu Shen Key Laboratory of Virology and National Virus Resource Center Wuhan Institute of VirologyChinese Academy of SciencesWuhan 430071China University of Chinese Academy of Sciences Beijing 100049China Faculty of Veterinary Science University of Agriculture FaisalabadFaisalabad 38040Pakistan The Children's Hospital Faisalabad 38000Pakistan Department of Bioinformatics and Biotechnology Government College University FaisalabadFaisalabad 38000Pakistan f Department of Microbiology Faculty of Veterinary and Animal SciencesThe Islamia University of BahawalpurBahawalpur 63100Pakistan Hubei Jiangxia Laboratory Wuhan 430200China Key Laboratory of Special Pathogens and Biosafety Wuhan Institute of VirologyCenter for Biosafety Mega-ScienceChinese Academy of SciencesWuhan 430071China Armed Forces Institute of Pathology(AFIP) Rawalpindi 46000Pakistan Department of Clinical Studies Faculty of Veterinary&Animal SciencesPir Mehr Ali Shah Arid Agriculture UniversityRawalpindi 46300Pakistan Institute of Microbiology Government College University FaisalabadFaisalabad 38000Pakistan l Atta-ur-Rahman School of Applied Biosciences National University of Science and TechnologyIslamabad 44000Pakistan Department of Clinical Sciences University of Veterinary and Animal SciencesLahore Sub-campusJhang 35200Pakistan Department of Molecular Pathology National Medical Center DHA Phase 1Karachi 75500Pakistan

Infectious diseases caused by arboviruses are a public health concern in ***,studies on data prevalence and threats posed by arboviruses are *** study investigated the seroprevalence of arboviruses in a healthy population in Pakistan,including severe fever with thrombocytopenia syndrome virus(SFTSV),Crimean-Congo hemorrhagic fever virus(CCHFV),Tamdy virus(TAMV),and Karshi virus(KSIV)based on a newly established luciferase immunoprecipitation system(LIPS)assays,and Zika virus(ZIKV)by enzyme-linked immunosorbent assays(ELISA).Neutralizing activities against these arboviruses were further examined from the antibody positive *** results showed that the seroprevalence of SFTSV,CCHFV,TAMV,KSIV,and ZIKV was 17.37%,7.58%,4.41%,1.10%,and 6.48%,respectively,and neutralizing to SFTSV(1.79%),CCHFV(2.62%),and ZIKV(0.69%)were identified,as well as to the SFTSV-related Guertu virus(GTV,0.83%).Risk factors associated with the incidence of exposure and levels of antibody response were ***,co-exposure to different arboviruses was demonstrated,as thirty-seven individuals were having antibodies against multiple viruses and thirteen showed neutralizing ***,individuals aged40 years,and outdoor workers had a high risk of exposure to *** these results reveal the substantial risks of infection with arboviruses in Pakistan,and indicate the threat from co-exposure to multiple *** findings raise the need for further epidemiologic investigation in expanded regions and populations and the necessity to improve health surveillance in Pakistan.

关键词： Arbovirus Pakistan Seroprevalence Tick-borne virus Mosquito-borne virus

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

畸形性骨炎:1例报告与综述

中国矫形外科杂志 2024年第10期32卷 906-910页

作者：白元帅袁普卫康武林董佩陕西中医药大学陕西咸阳712000 陕西中医药大学附属医院陕西咸阳712000

畸形性骨炎为骨重建异常的一种非炎症代谢性骨病,主要表现为骨痛、骨骼膨大、骨畸形和骨折。本病在国内极为罕见,其形成的主要原因尚不清楚,文献中多数认为其发生与遗传因素和环境因素相关。目前无明确诊断标准,主要依靠血碱性磷酸酶升... 详细信息

畸形性骨炎为骨重建异常的一种非炎症代谢性骨病,主要表现为骨痛、骨骼膨大、骨畸形和骨折。本病在国内极为罕见,其形成的主要原因尚不清楚,文献中多数认为其发生与遗传因素和环境因素相关。目前无明确诊断标准,主要依靠血碱性磷酸酶升高及特征性的影像学改变来诊断。本文报道1例畸形性骨炎的病例,结合免疫组化更加明确诊断,并通过回顾文献,着重介绍其发病机理、诊断、治疗方法,旨在为畸形性骨炎的研究与诊治提供参考。

关键词：畸形性骨炎诊断综述

2021—2023年黄石市蝇类密度及家蝇抗药性分析

在线全文

学校读者我要写书评

暂无评论

中华卫生杀虫药械 2024年第3期30卷 227-229页

作者：白元高雄黄石市疾病预防控制中心湖北黄石435000

目的了解黄石市2021—2023年蝇类种群密度、分布、季节消长规律及家蝇对常见杀虫剂的抗药性水平,为科学防控提供依据。方法 2021—2023年采用笼诱法对蝇类密度监测;2021年和2023年采用点滴法对家蝇抗药性调查,计算半数致死剂量(LD50)... 详细信息

目的了解黄石市2021—2023年蝇类种群密度、分布、季节消长规律及家蝇对常见杀虫剂的抗药性水平,为科学防控提供依据。方法 2021—2023年采用笼诱法对蝇类密度监测;2021年和2023年采用点滴法对家蝇抗药性调查,计算半数致死剂量(LD50)及抗性倍数。结果 2021—2023年全市共捕获蝇类739只,平均密度为4.40只/笼,其中麻蝇、厩腐蝇、家蝇分别占总数的46.55%、13.94%和13.26%。不同生境中,居民区蝇类密度最高,餐饮外环境密度最低。蝇类总体密度高峰出现在每年5—6月。家蝇对氯菊酯、高效氯氰菊酯均表现为敏感;对毒死蜱、溴氰菊酯、高效氯氟氰菊酯则产生了抗药性。结论初步掌握了黄石市蝇类种群构成及季节消长趋势,黄石城区家蝇种群对5种杀虫剂产生不同程度抗性。建议在今后蝇类防控工作中继续加强日常监测,科学合理用药,以延缓抗药性的发展。

关键词：蝇类密度季节消长抗药性

在线全文

学校读者我要写书评

暂无评论

经皮球囊主动脉瓣成形术在TAVR中的应用

中华心血管病杂志 2024年第5期52卷 566-570页

作者：关榆根白元赵仙先秦永文朱霓海军军医大学第一附属医院心血管内科上海200433

经皮球囊主动脉瓣成形术(PBAV)至今已有30余年历史。随着近年经导管主动脉瓣置换术(TAVR)的广泛开展,作为TAVR预扩张及后扩张的PBAV的应用也逐渐增多。同时PBAV也被用于血流动力学不稳定患者接受TAVR前的桥接治疗及即将接受高风险的非... 详细信息

经皮球囊主动脉瓣成形术(PBAV)至今已有30余年历史。随着近年经导管主动脉瓣置换术(TAVR)的广泛开展,作为TAVR预扩张及后扩张的PBAV的应用也逐渐增多。同时PBAV也被用于血流动力学不稳定患者接受TAVR前的桥接治疗及即将接受高风险的非心脏手术的重度主动脉瓣狭窄患者的预处理等。近年来有研究对TAVR术前和术后进行瓣膜预扩张和(或)后扩张的必要性进行了深入的研究和探讨。该文就PBAV的临床应用、并发症以及不同球囊的特点和创新研发方向进行总结。

关键词：主动脉瓣狭窄经皮球囊主动脉瓣成形术经导管主动脉瓣置换术预扩张后扩张桥接治疗

New Neural Network Response Surface Methods for Reliability Analysis

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2011年第1期24卷 25-31页

作者： REN yuan bai Guangchen School of Jet Propulsion Beijing University of Aeronautics and Astronautics Beijing 100191 China

This article presents two new kinds of artificial neural network （ANN） response surface methods （RSMs）： the ANN RSM based on early stopping technique （ANNRSM-1）, and the ANN RSM based on regularization theory （ANNRSM-2）. The following improvements are made to the conventional ANN RSM （ANNRSM-0）： 1） by monitoring the validation error during the training process, ANNRSM-1 determines the early stopping point and the training stopping point, and the weight vector at the early stopping point, which corresponds to the ANN model with the optimal generalization, is finally returned as the training result; 2） according to the regularization theory, ANNRSM-2 modifies the conventional training performance function by adding to it the sum of squares of the network weights, so the network weights are forced to have smaller values while the training error decreases. Tests show that the performance of ANN RSM becomes much better due to the above-mentioned improvements： first, ANNRSM-1 and ANNRSM-2 approximate to the limit state function （LSF） more accurately than ANNRSM-0; second, the estimated failure probabilities given by ANNRSM-1 and ANNRSM-2 have smaller errors than that obtained by ANNRSM-0; third, compared with ANNRSM-0, ANNRSM-1 and ANNRSM-2 require much fewer data samples to achieve stable failure probability results.

关键词： neural networks response surface reliability analysis early stopping regularization